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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 23070. Отображено 100.
06-04-2018 дата публикации

Дорн с дуплексным инструментом

Номер: RU0000178535U1
Автор: Александр Викторович Морозов, Евгений Александрович Токмаков
Принадлежит: Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновская государственная сельскохозяйственная академия имени П.А. Столыпина"

Полезная модель относится к машиностроению, в частности к инструментальной оснастке для поверхностного упрочнения, и может быть использована при упрочнении внутренних поверхностей деталей.Дорн с дуплексным инструментом содержит оправку с наружной резьбой в хвостовой части, гайку, две стяжные гайки, токоизоляционную втулку, калибрующий зуб, упрочняющий зуб, втулку-изолятор, изоляционные кольца. В верхней торцевой части оправки выполнено осевое глухое отверстие, герметично заглушенное винтовой пробкой. В средней части оправки, ниже стяжных гаек, выполнено радиальное глухое отверстие, сообщающееся с осевым отверстием и установлен штуцер. В нижней части оправки на внешней стороне выполнено два симметричных друг другу канала для подвода технологической жидкости к сопрягаемым поверхностям упрочняющего элемента и обрабатываемым поверхностям отверстия.Наличие системы каналов в оправке позволит обеспечить подвод технологической жидкости к сопрягаемым поверхностям упрочняющего элемента и обрабатываемым поверхностям отверстия, тем самым улучшить отвод тепла из зоны контакта и повысить качество закалки. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 178 535 U1 (51) МПК C21D 1/10 (2006.01) C21D 1/62 (2006.01) C21D 8/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК C21D 1/10 (2006.01) (21)(22) Заявка: 2017113864, 20.04.2017 (24) Дата начала отсчета срока действия патента: 06.04.2018 Приоритет(ы): (22) Дата подачи заявки: 20.04.2017 (45) Опубликовано: 06.04.2018 Бюл. № 10 1 7 8 5 3 5 R U (54) ДОРН С ДУПЛЕКСНЫМ ИНСТРУМЕНТОМ (57) Реферат: Полезная модель относится к машиностроению, в частности к инструментальной оснастке для поверхностного упрочнения, и может быть использована при упрочнении внутренних поверхностей деталей. Дорн с дуплексным инструментом содержит оправку с наружной резьбой в хвостовой части, гайку, две стяжные гайки, токоизоляционную втулку, калибрующий зуб, упрочняющий зуб, втулку-изолятор, изоляционные ...

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Номер записи: 1
08-03-2012 дата публикации

Method of manufacturing a bearing ring

Номер: US20120055587A1
Автор: Cornelius Petrus Antonius Vissers, Hendrikus Jan Kapaan, Jacobus Zwarts, Johannes Franciscus Van De Sanden
Принадлежит: SKF AB

The present invention resides in a method of manufacturing a bearing ring ( 101 ) for a rolling element bearing, wherein the bearing ring comprises a bearing race ( 102 ) made of a bearing grade steel and an overmoulded part ( 106 ) that is preferably made of a lightweight metal such as aluminium or a thermoplastic material such as polyamide. According to the invention, the method comprises a step of hardening at least a raceway surface ( 103 ) of the bearing race prior to a step of joining the overmoulded part ( 106 ) to the bearing race ( 102 ) in a moulding process. In a further development, the method comprises a step of temperature control, to ensure that the temperature of the raceway surface ( 103 ) is kept below a predetermined value during the moulding process.

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Номер записи: 2
03-05-2012 дата публикации

Localized Induction Heating For Residual Stress Optimization

Номер: US20120107644A1
Автор: Fernando Martinez Diez, Howard W. Ludewig, Kandrap Siddharthbai Patel, Michael Lynn Johnson, Pingshun Zhao, Steven R. Thompson, Tao Hong, Zhaolin Hu
Принадлежит: Caterpillar Inc

An apparatus for the heat-treating of a heat-hardenable steel cruciform article having a weld seam includes a heating element to heat the weld seam to a point that an austenitic transformation occurs, and a quenching chamber to cool the weld seam, causing the formation of Martensite and an associated expansion. The quenching is rapid since slow quenching may allow a crystalline phase other than martensite to form. The apparatus may comprise rollers operable to convey the welded cruciform article through the apparatus at a speed such that the weld seam is subjected to heating for a predetermined heat time sufficient to cause a formation of martensite there within, and such that the heated portion reaches the quenching chamber and is quenched to create a substantial amount of martensite, e.g., an amount sufficient to cause expansion of the part.

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Номер записи: 3
31-05-2012 дата публикации

Method for producing martensitic steel with mixed hardening

Номер: US20120132326A1
Автор: Laurent Ferrer, Philippe Heritier
Принадлежит: Aubert and Duval SA, SNECMA SAS

A method of producing a martensitic steel including a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of a last heat shaping pass of the steel is lower than the solubility temperature of aluminum nitrides in the steel, and a treatment temperature for each potential heat treatment after the last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in the steel.

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Номер записи: 4
18-10-2012 дата публикации

Hot-rolled steel car or wire rod

Номер: US20120263622A1
Автор: Akira Kito, Takayuki Nakamura, Yoshihiro Daitoh
Принадлежит: Sumitomo Metal Industries Ltd

A hot-rolled steel bar or wire rod consisting of C: 0.1 to 0.3%, Si: 0.05 to 1.5%, Mn: 0.4 to 2.0%, S: 0.003 to 0.05%, Cr: 0.5 to 3.0%, Al: 0.02 to 0.05%, and N: 0.010 to 0.025%, the balance being Fe and impurities, and the impurities containing P: 0.025% or less, Ti: 0.003% or less, and O: 0.002% or less, wherein the structure thereof is composed of a ferrite-pearlite structure, ferrite-pearlite-bainite structure, or ferrite-bainite structure; the standard deviation of ferrite fractions at the time when randomly selected 15 viewing fields of a transverse cross section are observed and measured with the area per one viewing field being 62,500 μm 2 is 0.10 or less; and in a region from the surface to one-fifth of the radius and a region from the center to one-fifth of the radius in the transverse cross section, the amount of Al precipitating as AlN is 0.005% or less, and the density in terms of the number of AlN having a diameter of 100 nm or larger is 5/100 μm 2 or less. In the hot-rolled steel bar or wire rod, even if hot forging is performed in various temperature ranges, austenite grains can be stably prevented from being coarsened at the time of heating for carburization.

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Номер записи: 5
01-11-2012 дата публикации

Method for manufacturing a hot press-hardened component, use of a steel product for manufacturing a hot press-hardened component and hot press-hardened component

Номер: US20120273092A1
Автор: Evelin Ratte
Принадлежит: THYSSENKRUPP NIROSTA GMBH

A method of manufacturing a hot press-hardened component comprises the following production steps: a) providing a steel product produced at least in sections from a stainless steel comprising of the following composition (specified in % wt.) C: 0.010-1.200%, P: up to 0.1%, S: up to 0.1%, Si: 0.10-1.5%, Cr: 10.5-20.0% and optionally one or more elements from the group “Mn, Mo, Ni, Cu, N, Ti, Nb, B, V, Al, Ca, As, Sn, Sb, Pb, Bi, H” with the requirement Mn: 0.10-3.0%, Mo: 0.05-2.50%, Ni: 0.05-8.50%, Cu: 0.050-3.00%, N: 0.01-0.2%, Ti: up to 0.02%, Nb: up to 0.1%, B: up to 0.1%, V: up to 0.2%, Al: 0.001-1.50%, Ca: 0.0005-0.003%, As: 0.003-0.015%, Sn: 0.003-0.01%, Sb: 0.002-0.01%, Pb: up to 0.01%, Bi: up to 0.01%, H: up to 0.0025%, remainder iron and unavoidable impurities; b) heating the steel product to an austenisation temperature above the Ac3 temperature of the stainless steel; c) hot press-hardening the heated steel product in a pressing die to form the component; and d) cooling at least one section of the component at a cooling rate that is high enough for a martensitic structure to form in each section that is rapidly cooled.

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Номер записи: 6
27-12-2012 дата публикации

Seamless steel pipe for high-strength hollow spring

Номер: US20120325364A1
Автор: Hitoshi Hatano, Kotaro Toyotake, Takuya Kochi
Принадлежит: Kobe Steel Ltd

Disclosed is a seamless steel pipe for a high-strength hollow spring, which comprises 0.20 to 0.70 mass % of C, 0.5 to 3.0 mass % of Si, 0.1 to 3.0 mass % of Mn, 0.030 mass % or less (including 0%) of P, 0.030 mass % or less (including 0%) of S, 0.02 mass % or less (including 0%) of N, and the remainder made up by Fe and unavoidable impurities, and which is characterized in that carbide has an equivalent circle diameter of 1.00 μm or less. The seamless steel pipe enables the production of a hollow spring having high strength and excellent durability.

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Номер записи: 7
11-04-2013 дата публикации

High strength steel sheet and method for manufacturing the same

Номер: US20130087253A1
Автор: Hiroshi Matsuda, Yasushi Tanaka, Yoshimasa Funakawa
Принадлежит: JFE Steel Corp

A high strength steel sheet has tensile strength of at least 1470 MPa and (tensile strength×total elongation) of at least 29000 MPa·% with a composition including, by mass %, C: 0.30% to 0.73%, Si: 3.0% or less, Al: 3.0% or less, Si+Al: at least 0.7%, Cr: 0.2% to 8.0%, Mn: 10.0% or less, Cr+Mn: at least 1.0%, P: 0.1% or less, S: 0.07% or less, N: 0.010% or less, and remainder as Fe and incidental impurities; and processing the steel sheet such that microstructure satisfies area ratio of martensite with respect to the microstructure of 15% to 90%; content of retained austenite of 10% to 50%; at least 50% of the martensite is constituted of tempered martensite and area ratio of the tempered martensite with respect to the microstructure is at least 10%; and area ratio of polygonal ferrite with respect to the microstructure is 10% or less.

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Номер записи: 8
18-04-2013 дата публикации

Martensitic antibacterial stainless steel and manufacturing method thereof

Номер: US20130092296A1
Автор: Dexin Qui
Принадлежит: Individual

This invention relates to antimicrobial martensitic stainless steels with nano precipitation and their manufacturing method of melting, forging, heat treatment. As the nano ε-Cu phases are precipitated in the matrix dispersedly, the martensitic stainless steels have excellent antimicrobial properties. The martensitic stainless steels may comprise from 0.35 to 1.20 weight percent C, from 12.00 to 26.90 weight percent Cr, from 0.29 to 4.60 weight percent Cu, 0.27 weight percent as less Ag, from 0.15 to 4.60 weight percent W, from 0.27 to 2.80 weight percent Ni, from 0.01 to 1.125 weight percent Nb, from 0.01 to 1.35 weight percent V, 1.8 percent or less Mn, from 0.15 to 4.90 weight percent Mo, 2.6 weight percent or less Si, 3.6 weight percent or less RE (rare earth) and the balance Fe and incidental impurities.

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Номер записи: 9
18-04-2013 дата публикации

Method for inhibiting corrosion under insulation on the exterior of a structure

Номер: US20130095313A1
Автор: Brian Joseph Fitzgerald, James Edward Feather, Shiun Ling
Принадлежит: ExxonMobil Research and Engineering Co

A method for inhibiting corrosion under insulation (CUI) on the exterior of a structure, e.g., pipelines, piping, vessels and tanks, is provided. The method involves providing a structure that is at least partially formed from a corrosion resistant carbon steel (CRCS) composition. The CRCS composition includes corrosion resistance alloying additions in the amount of 0.1 weight percent to 9 weight percent. At least one alloying addition has a low free energy of formation for its oxide and/or hydroxide, e.g., vanadium and/or titanium. A corrosion inhibited structure that includes a structure at least partially formed from a corrosion resistant carbon steel (CRCS) composition, and insulation positioned around at least a portion of the structure.

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Номер записи: 10
16-05-2013 дата публикации

Spring and manufacture method thereof

Номер: US20130118655A1
Автор: Kosuke Shibairi, Shimpei Kurokawa, Takeshi Suzuki, Yoshiki Ono
Принадлежит: NHK Spring Co Ltd

A spring consists of, by mass %, 0.5 to 0.7% of C, 1.0 to 2.0% of Si, 0.1 to 1.0% of Mn, 0.1 to 1.0% of Cr, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and inevitable impurities. The spring has a structure including not less than 65% of bainite and 4 to 13% of residual austenite by area ratio in a cross section. The spring has a compressive residual stress layer in a cross section from a surface to a depth of 0.35 mm to D/4, in which D (mm) is a circle-equivalent diameter of the cross section. The spring has a high hardness layer with greater hardness than a center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.

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Номер записи: 11
11-07-2013 дата публикации

HIGH FREQUENCY HEATING COIL

Номер: US20130175260A1
Автор: Oti Yosihide, Saiki Masao, Yamashita Hiroyuki
Принадлежит: HONDA MOTOR CO., LTD.

A high frequency heating coil is provided in which a main body part of a workpiece is surrounded by a loop part of the high frequency heating coil and subjected to high frequency heating, and a flange part of the workpiece is sandwiched by first and second lead-out parts of the high frequency heating coil and subjected to high frequency heating. The first and second lead-out parts oppose the flange part and are offset in the axial direction of the workpiece, thereby preventing eddy currents in opposite directions to each other from being generated in the flange part and preventing the flange part from being more difficult to heat than the main body part. The high frequency heating coil can uniformly heat a pipe-shaped workpiece having a flange part projecting radially outward from an outer peripheral face of a main body part. 1. A high frequency heating coil , in order to subject to high frequency heating a pipe-shaped workpiece having formed along an axial direction thereof a flange part projecting outward in a radial direction from an outer peripheral face of a main body part having a closed cross section , the high frequency heating coil comprising a loop part that surrounds the main body part and a pair of lead-out parts that extend outward in the radial direction from opposite ends close to each other in an axial direction of the loop part and face opposite faces of the flange part ,wherein the pair of lead-out parts are offset from each other toward opposite sides in the axial direction.2. The high frequency heating coil according to claim 1 , wherein the pair of lead-out parts are curved into a U-shape claim 1 , a V-shape claim 1 , or a squared U-shape.3. The high frequency heating coil according to claim 2 , wherein the pair of lead-out parts form a loop when viewed from a direction at right angles to the axis.4. The high frequency heating coil according to claim 1 , wherein the workpiece is formed by curving a metal plate material into a pipe shape claim 1 ...

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Номер записи: 12
18-07-2013 дата публикации

Press-formed product and method for producing same

Номер: US20130180635A1
Автор: Junya Naitou, Keisuke Okita, Shushi Ikeda
Принадлежит: Kobe Steel Ltd

There is provided a useful method for producing a press-formed product without causing disadvantages such as hardness variation, which product has favorable formability in a level so as to be able to be produced by deep drawing, and which method is carried out by heating a thin steel sheet to a temperature not lower than an Ac 3 transformation point thereof; and then cooling the thin steel sheet at a rate not lower than a critical cooling rate, during which the thin steel sheet is formed into the press-formed product, wherein the forming is started from a temperature higher than a martensitic transformation start temperature Ms thereof, the cooling rate is kept to be 10° C./sec. or higher during the forming, and the forming is finished in a temperature range not higher than the martensitic transformation start temperature Ms.

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Номер записи: 13
22-08-2013 дата публикации

MECHANICAL COMPONENT AND METHOD OF SURFACE HARDENING

Номер: US20130216856A1
Автор: Burtchen Marco
Принадлежит:

Mechanical component having a surface at least one part of which has been surface hardened by induction heating. A cross section of the mechanical component through the surface exhibits a hardness Hat the surface, and remains substantially equal through a first region, a hardness Hat the non-hardened core of the mechanical component and remains substantially equal through a third region and a transition, second region spanning between the first and third regions. The hardness profile in the first region has an average hardness Y, and the hardness profile in the third region has an average hardness Y. If a line is drawn on the hardness profile in the second region between the points (formula) and (formula), where 0 Подробнее

Номер записи: 14
10-10-2013 дата публикации

Ferritic Stainless Steel for Use as Conduit Members for Emission of Automotive Exhaust Gas

Номер: US20130263979A1
Автор: FUJIMURA Yoshitomo, Nagoya Toshirou, OKU Manabu
Принадлежит: NISSHIN STEEL CO., LTD.

A ferritic stainless steel useful as conduit members for emission of automotive exhaust gas consists of C up to 0.03 mass %, Si up to 1.0 mass %, Mn up to 1.5 mass %, Ni up to 0.6 mass %, 10-20 mass % of Cr, Nb up to 0.50 mass %, 0.8-2.0 mass % of Cu, Al up to 0.03 mass %, 0.03-0.20 mass % of V, N up to 0.03 mass % and the balance being Fe except inevitable impurities with a provision that at least 90% of Cu contained is dissolved in a steel matrix and that Nb□8(C+N). The steel may further contain 0.05-0.30 mass % of Ti and/or 0.0005-0.02 mass % of B. Mo as an inevitable impurity is controlled to be less than 0.10 mass %. The steel has excellent formability, low-temperature toughness and weldability as well as the same heat-resistance as Nb, Mo-alloyed steel. 1. A ferritic stainless steel for use as a conduit member for emission of automotive exhaust gas , consisting essentially of C up to 0.03 mass % , Si up to 1.0 mass % , Mn up to 1.5 mass % , Ni up to 0.6 mass % , 10-20 mass % of Cr , 0.50 mass % or less of Nb , 0.8-2.0 mass % of Cu , Al up to 0.03 mass % , 0.03-0.20 mass % of V , N up to 0.03 mass % and the balance being Fe except inevitable impurities with a provision that at least 90% of Cu contained is dissolved in a steel matrix and that Nb≧8(C+N).2. The ferritic stainless steel defined by claim 1 , wherein Mo as an inevitable impurity is controlled to be less than 0.10 mass %.3. The ferritic stainless steel defined by claim 1 , which further contains 0.05-3.0 mass % of Ti.4. The ferritic stainless steel defined by claim 1 , which further contains 0.0005-0.02 mass % of B.5. The ferritic stainless steel defined by claim 2 , which further contains 0.05-3.0 mass % of Ti.6. The ferritic stainless steel defined by claim 2 , which further contains 0.0005-0.02 mass of B.7. The ferritic stainless steel defined by claim 3 , which further contains 0.0005-0.02 mass % of B.8. The ferritic stainless steel defined by claim 5 , which further contains 0.0005-0.02 mass % of ...

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Номер записи: 15
28-11-2013 дата публикации

Spray Quench Systems for Heat Treated Metal Products

Номер: US20130312875A1
Автор: NALLEN Michael A., SCOTT Paul F.
Принадлежит: Thermatool Corp.

A method of quenching a workpiece is provided with one or more spray quench rings that eject a controlled variable volume of spray quench onto a workpiece passing through the quench rings by dynamically adjusting the axially adjustable distance between the inner and outer ring elements of each quench ring while the workpiece passes through the quench rings in response to mass cooling requirements of the workpiece passing through the quench rings. The quench rings can also be axial adjusted relative to each other in response to the mass cooling requirements. Dynamically adjustable reflected spray guards can be provided to prevent quench spray pattern interference between adjacent quench rings. 1. A method of quenching a workpiece comprising the steps of:passing the workpiece through a quench ring comprising an outer ring element and an inner ring element, the inner and outer ring elements separated from each other by an axially adjustable distance to form a plenum and a variable volume outlet passage between the inner surfaces of the inner and outer ring elements, an outlet of the plenum in communication with the variable volume outlet passage formed between an adjacent facing edges of the inner and the outer ring elements;supplying a quenchant to an opening in the outer ring element, the opening in communication with an inlet of the plenum; andejecting the quenchant in a conical volume from the variable volume outlet passage onto a surface of the workpiece passing through the quench ring.2. The method of further comprising the step of adjusting the axially adjustable distance separating the inner and the outer ring elements to change a variable volume of the variable volume outlet passage formed between the adjacent facing edges of the inner and the outer ring elements.3. A method of quenching a workpiece comprising the steps of:passing the workpiece through a quench ring assembly comprising at least two quench rings, each of the at least two quench rings having an ...

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Номер записи: 16
28-11-2013 дата публикации

Spray Quench Systems for Heat Treated Metal Products

Номер: US20130312879A1
Автор: NALLEN Michael A., SCOTT Paul F.
Принадлежит: Thermatool Corp.

A spray quench system is provided with one or more spray quench rings that eject a controlled volume of quenchant spray onto a workpiece passing through the quench rings. Supply of the quenchant to the quench rings is coordinated with control of the quench rings to selectively change the pressure, quenchant spray exit velocity from the quench rings, flow rate or pattern of the quenchant spray onto the workpiece depending upon mass cooling requirements as the workpiece passes through the quench rings. 1. A spray quench system for quenching a workpiece , the spray quench system comprising: an outer ring element having at least one exterior opening for connection to the supply of the quenchant to an interior region of the outer ring element;', 'an inner ring element at least partially inserted into the outer ring element;', 'a quench ring plenum formed from the interior region of the outer ring element in combination with an interior region of the inner ring element for receiving the supply of the quenchant from the at least one exterior opening;', 'an outlet passage from the quench ring plenum formed between an adjacent facing edges of the outer ring element and the inner ring element for receiving the quenchant from the quench ring plenum and ejecting the quenchant received from the quench ring plenum in a conical volume to make contact with a surface region of the workpiece; and', 'one or more fasteners joining the inner ring element and the outer ring element., 'a supply of a quenchant to one or more quench rings, each of the one or more quench rings comprising2. The spray quench system of further comprising a fastener control apparatus to dynamically adjust the one or more fasteners for at least one of the one or more quench rings to change the conical volume of the outlet passage.3. The spray quench system of wherein the supply of the quenchant comprises a means for variably controlling a flow rate of the quenchant from a quenchant reservoir to each of the one or ...

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Номер записи: 17
19-12-2013 дата публикации

METHOD AND APPARATUS FOR TREATING A STEEL ARTICLE

Номер: US20130333811A1
Автор: BATISTE John, COOPER Brad, HASELKORN Mike, NICHOLSON Brent, SLOAN Jim, SPARLING Jack, TUREK Mark, ZYRA Todd
Принадлежит: BUFFALO ARMORY LLC

A method for forming and treating a steel article of a high strength and high ductility alloy particularly suited for use as armor plate. The method includes the steps of providing a starting material for the steel article, heating the starting material to a peak temperature range in less than ten seconds, holding the heated steel composition at the peak temperature range for between two and six seconds, quenching the heated steel composition from the peak temperature range to below 100° C. (212° F.) at a temperature rate reduction of 400 and 3000° C./sec (752 and 5432° F./sec), removing residual quench media from the surface of the quenched steel composition, tempering the quenched steel composition at a temperature of 100 to 260° C. (212 to 500° F.); and air cooling the tempered steel composition to less than 100° C. (212° F.) to form a steel having desired mechanical properties. 1. A method for treating a steel article to form a high hardness and ductile alloy comprising the steps of:(a) providing a steel composition having a material thickness less than 0.5 inches (12.7 mm), having an initial microstructure of ferrite and pearlite, and having a composition of, by weight,carbon between 0.25 and 0.55%silicon between 0.15 and 0.35%,manganese between 0.40 and 1.0%,chromium between 0.80 and 1.10%,molybdenum between 0.15 and 0.25%,sulfur less than 0.040%,phosphorus less than 0.035%;(b) heating the provided steel composition to a peak temperature of between 850° C. (1562° F.) and 1150° C. (2102° F.) in less than ten seconds;(c) holding the heated steel composition at the peak temperature range for between two and ten seconds;(d) quenching the heated steel composition from the peak temperature range to below 100° C. (212° F.) at a temperature rate reduction of between 400 and 3000° C./sec (752-5432° F./sec);(e) removing residual quench media from the surface of the quenched steel composition;(f) tempering the quenched steel composition at a temperature from 100° C. to ...

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Номер записи: 18
09-01-2014 дата публикации

QUENCHING METHOD FOR STEEL PIPE

Номер: US20140007994A1
Автор: Arai Yuji, Okamura Kazuo, Omura Tomohiko, Sakamoto Akihiro, Yamamoto Kenji
Принадлежит: NIPPON STEEL & SUMITOMO METAL CORPORATION

A method for quenching a steel pipe by water cooling from an outer surface thereof, where pipe end portions are not subjected to water cooling, and at least part of a main body other than the pipe end portions is subjected to water cooling. A region(s) that is not subjected to direct water cooling over an entire circumference thereof can be along an axial direction at least in part of the main body other than the pipe end portions. The start and stop of water cooling can be intermittent at least in part of the quenching. During the water cooling of the pipe outer surface, an intensified water cooling can be performed in a temperature range in which the pipe outer surface temperature is higher than Ms point. Thereafter, the cooling can be switched to moderate cooling so that the outer surface is cooled down to Ms point or lower. 1. A method for quenching a steel pipe by water cooling from an outer surface thereof , whereinpipe end portions are not subjected to water cooling, and at least part of a main body other than the pipe end portions is subjected to water cooling.2. The method for quenching a steel pipe according to claim 1 , whereina region(s) that is not subjected to direct water cooling over an entire circumference thereof is provided along an axial direction at least in part of the main body other than the pipe end portions.3. The method for quenching a steel pipe according to claim 1 , whereinthe start and stop of water cooling are repeated intermittently at least in part of a quenching process.4. The method for quenching a steel pipe according to claim 1 , whereinin order to apply water cooling onto an outer surface of the steel pipe, an intensified water cooling is performed in a temperature range in which the temperature of the outer surface of the steel pipe is higher than Ms point, thereafter switched to a moderate water cooling or air cooling, and the outer surface is forcedly cooled down to Ms point or lower.5. The method for quenching a steel pipe ...

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Номер записи: 19
06-02-2014 дата публикации

Hot stamped article, method of producing hot stamped article, energy absorbing member, and method of producing energy absorbing member

Номер: US20140037980A1
Автор: Kaoru Kawasaki
Принадлежит: Individual

A hot stamped article has a component composition containing, in terms of % by mass, 0.002% to 0.1% of C, 0.01% to 0.5% of Si, 0.5% to 2.5% of Mn+Cr, 0.1% or less of P, 0.01% or less of S, 0.05% or less of t-Al, 0.005% or less of N, and 0.0005% to 0.004% of B which is optionally contained in a case where the Mn+Cr is 1.0% or more, the remainder being Fe and unavoidable impurities. The hot stamped article has a microstructure composed of, in terms of an area ratio, 0% or more and less than 90% of martensite, 10% to 100% of bainite, and less than 0.5% of unavoidable inclusion structures, or a microstructure composed of, in terms of an area ratio, 99.5% to 100% of bainitic ferrite, and less than 0.5% of unavoidable inclusion structures.

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Номер записи: 20
13-02-2014 дата публикации

ANNULAR WORKPIECE QUENCHING METHOD AND QUENCHING APPARATUS USED IN THE METHOD

Номер: US20140041771A1
Автор: HIRANO Tetsurou, Kuno Atsushi
Принадлежит: JTEKT CORPORATION

An annular workplace quenching method includes: cooling an annular workpiece with an inner die arranged radially inward of the workpiece heated at a quenching temperature; pressing the workpiece in a width direction at a low pressure and inserting the workpiece in an outer die with restraint of an inner peripheral surface of the workpiece continued, when the restraint is started by contact with the inner die, after a temperature of the workpiece is decreased to 500° C. or lower but before the temperature is decreased to a martensitic transformation start temperature (Ms point); and restraining the workpiece in the width direction by pressing the workpiece in the width direction at a high pressure, and restraining an outer peripheral surface of the workpiece that undergoes volume expansion due to martensitic transformation, using the outer die, after the temperature of the workpiece is decreased to the Ms point or lower. 1. An annular workpiece quenching method comprising the steps of:cooling an annular workpiece in a state where an inner die is arranged radially inward of the annular workpiece that has been heated at a quenching temperature;pressing the annular workpiece in a width direction at a low pressure and inserting the annular workpiece in an outer die with restraint of an inner peripheral surface of the annular workpiece continued, when the restraint of the inner peripheral surface of the annular workpiece is started by contact of the inner peripheral surface of the annular workpiece with the inner die due to contraction of the inner peripheral surface caused by cooling, after a temperature of the annular workpiece is decreased to a temperature equal to or lower than 500° C. but before the temperature of the annular workpiece is decreased to a martensitic transformation start temperature; andrestraining the annular workpiece in the width direction between the inner die and a widthwise restraint jig by pressing the annular workpiece in the width direction at ...

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Номер записи: 21
13-02-2014 дата публикации

Hot press-formed product, process for producing same, and thin steel sheet for hot press forming

Номер: US20140044585A1
Автор: Junya Naitou, Keisuke Okita, Shushi Ikeda, Toshio Murakami
Принадлежит: Kobe Steel Ltd

There is provided a hot press-formed product, including a thin steel sheet formed by a hot press-forming method, and having a metallic structure that contains retained austenite at 3% to 20% by volume, whereby balance between strength and elongation can be controlled in a proper range and high ductility can be achieved.

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Номер записи: 22
06-03-2014 дата публикации

Curing apparatus

Номер: US20140061508A1
Автор: Hoonseok Kang, Jaeyeol HEO, Jongho Song, Kyengbaek Ryu, Ojun Kwon
Принадлежит: LG Display Co Ltd

An exemplary embodiment of the present invention provides a curing apparatus comprising: a cassette; lamps configured in the cassette; a lamp housing having lamp accommodating portions disposed within the cassette to accommodate the lamps; and window plates separately configured so as to correspond to the positions of the lamp accommodating portions.

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Номер записи: 23
06-03-2014 дата публикации

Hot press-formed product, process for producing same, and thin steel sheet for hot press forming

Номер: US20140065007A1
Автор: Junya Naitou, Keisuke Okita, Shushi Ikeda, Toshio Murakami
Принадлежит: Kobe Steel Ltd

There is provided a hot press-formed product, including a thin steel sheet formed by a hot press-forming method, and having a metallic structure that contains martensite at 80% to 97% by area and retained austenite at 3% to 20% by area, the remainder structure of which is at 5% by area or lower, whereby balance between strength and elongation can be controlled in a proper range and high ductility can be achieved.

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Номер записи: 24
13-03-2014 дата публикации

Bumper

Номер: US20140070552A1
Автор: Shimotsu Koji
Принадлежит: ASTEER CO., LTD.

A bumper for vehicles having a high productivity and a large energy absorption amount in which the reinforcement beam is prevented from buckling. The bumper includes a reinforcement beam made of steel and support members protruding from a vehicle frame and supporting the reinforcement beam therebetween. The reinforcement beam is provided with a quenched portion provided at least over a portion where an obstacle hits the reinforcement beam. The reinforcement beam is further provided with unquenched portions next to the portion where the obstacle hits the reinforcement beam to sandwich the quenched portion. A mechanical strength of the unquenched portions is smaller than the mechanical strength of the quenched portion. 1. A bumper for a vehicle comprising:a reinforcement beam made of steel; andsupport members protruding from a vehicle frame and supporting the reinforcement beam therebetween;wherein the reinforcement beam is provided with a quenched portion provided at least over a portion where an obstacle hits the reinforcement beam, the reinforcement beam is further provided with unquenched portions next to the portion where the obstacle hits the reinforcement beam to sandwich the quenched portion, and a mechanical strength of the unquenched portions is smaller than the mechanical strength of the quenched portion.2. The bumper for a vehicle according to claim 1 , wherein the portion where the obstacle hits the reinforcement beam is around a middle portion of the reinforcement beam in an extending direction claim 1 , and the unquenched portions is symmetrically provided with respect to the middle portion of the reinforcement beam.3. The bumper for a vehicle according to claim 1 , wherein the unquenched portions are provided at least on a front face of the reinforcement beam.4. The bumper for a vehicle according to claim 1 , wherein the reinforcement beam has a hollow cross section having corners. 1. Field of the InventionThe present invention relates to a bumper for ...

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Номер записи: 25
03-04-2014 дата публикации

Multimedia Quench System and Process

Номер: US20140090754A1
Автор: Goldsteinas Aymeric, Grobler Werner Hendrik
Принадлежит: IPSEN, INC.

A process and apparatus for quenching a metal workload from an elevated heat treating temperature are disclosed. The process includes the step of flowing a vegetable oil quenchant over the metal workload to provide a cooling rate sufficient to transform the metal substantially completely to a desired second phase comprising martensite, bainite, pearlite, or a combination thereof within a preselected time period. The apparatus includes a quenching chamber that has a base, an upper housing, a door, and an associated actuator for opening and closing the quenching chamber. The apparatus also includes a vessel for holding a volume of a vegetable oil quenchant, means for conducting the vegetable oil quenchant from the vessel to the quenching chamber, and means disposed in the quenching chamber for flowing the vegetable oil quenchant over a metal workload disposed in the quenching chamber. 1. A process for cooling a metal workload that has been heated to an elevated temperature comprising the steps of:providing a metal workload that has been heated to an elevated temperature selected to transform the metal part substantially completely into an austenitic phase;placing the metal workload in a quenching chamber while the metal part is at the elevated temperature;closing the quenching chamber; and thenflowing a vegetable oil quenchant over the metal workload to provide a cooling rate sufficient to transform the metal substantially completely to a desired second phase comprising martensite, bainite, pearlite, or a combination thereof within a preselected time period.2. The process as set forth in comprising the step of applying a subatmospheric pressure in. the quenching chamber during said flowing step.3. The process as set forth in comprising the step of supplying an inert gas into the quenching chamber while the subatmospheric pressure is applied.4. The process as set forth in comprising the step of supplying an inert gas into the quenching chamber to pressurize the ...

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Номер записи: 26
06-01-2022 дата публикации

HORSESHOE NAIL AND METHOD FOR MANUFACTURING SUCH HORSESHOE NAIL

Номер: US20220000091A1
Автор: Kerckhaert Michiel Petrus M.
Принадлежит: Kerckhaert Hoefijzerfabriek B.V.

A horseshoe nail for nailing a horseshoe to a hoof. The horseshoe nail is made from steel with a carbon weight percentage between 0.18 and 0.25. The horseshoe nail contains a shank with a tip at one end and a widened head at the other end. The head is at least hardened over a part of its length from its free end. The shank is not hardened over its entire or almost entire length from the tip. 1. A horseshoe nail for nailing a horseshoe to a hoof , the horseshoe nail is made from steel with a carbon weight percentage between 0.18 and 0.25 , whereby the horseshoe nail contains a shank with a tip at one end and a widened head at the other end and whereby the head is at least hardened over a part of its length from its free end , whereas the shank is not hardened over its entire or almost entire length from the tip.2. The horseshoe nail according to claim 1 , wherein the horseshoe nail is made from steel with a carbon weight percentage of at least 0.18.3. The horseshoe nail according to claim 1 , wherein that only the head is hardened up to a length from 1.9 mm to 3.9 mm from its free end.4. The horseshoe nail according to claim 1 , wherein a hardened section of the head has a hardness HRC of 30 or more.5. The horseshoe nail according to claim 4 , wherein a cross-section of both the head and the shank of the horseshoe nail is rectangular claim 4 , whereby longest sides of both the cross-sections are parallel with each other.6. A combination of horseshoe and horseshoe nail claim 1 , whereby the horseshoe is provided with one or more grooves with one or more nail holes in a base whereby in a mounted condition of the horseshoe under a hoof claim 1 , the nail is partly sunken with its head in the groove with an end protruding from the groove claim 1 , wherein that the horseshoe nail is a horseshoe nail according to in which at least a protruding section of the head is hardened.7. The combination according to claim 6 , wherein that only the protruding section of the head is ...

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Номер записи: 27
06-01-2022 дата публикации

PRODUCTION METHOD FOR HIGH-STRENGTH STEEL SHEET

Номер: US20220002832A1
Автор: Kaneko Shinjiro, Minami Hidekazu
Принадлежит: JFE STEEL CORPORATION

A production method for a high-strength steel sheet having a tensile strength TS of 780 MPa or more is provided. The production method comprises: heating a steel slab having a predetermined chemical composition; hotrolling the steel slab; coiling the hot-rolled sheet; subjecting the hot-rolled sheet to pickling treatment; holding the hot-rolled sheet in a pre-determined temperature range for predetermined time; cold rolling the hot-rolled sheet to obtain a cold-rolled sheet; subjecting the cold-rolled sheet to first annealing treatment; cooling the cold-rolled sheet at a pre-determined average cooling rate; cooling the cold-rolled sheet to room temperature; reheating the clod-rolled sheet to perform second annealing treatment; cooling the cold-rolled sheet at a first average cooling rate; cooling the cold-rolled sheet at a second average cooling rate; reheating the cold-rolled sheet to a predetermined reheating temperature range; and holding the cold-rolled sheet in the reheating temperature range. 1. A production method for a high-strength steel sheet having a tensile strength TS of 780 MPa or more , the production method comprising: C: 0.08% or more and 0.35% or less,', 'Si: 0.50% or more and 2.50% or less,', 'Mn: 1.50% or more and 3.00% or less,', 'P: 0.001% or more and 0.100% or less,', 'S: 0.0001% or more and 0.0200% or less, and', 'N: 0.0005% or more and 0.0100% or less,', 'optionally, in mass %, at least one element selected from the group consisting of', 'Al: 0.01% or more and 1.00% or less,', 'Ti: 0.005% or more and 0.100% or less,', 'Nb: 0.005% or more and 0.100% or less,', 'V: 0.005% or more and 0.100% or less,', 'B: 0.0001% or more and 0.0050% or less,', 'Cr: 0.05% or more and 1.00% or less,', 'Cu: 0.05% or more and 1.00% or less,', 'Sb: 0.0020% or more and 0.2000% or less,', 'Sn: 0.0020% or more and 0.2000% or less,', 'Ta: 0.0010% or more and 0.1000% or less,', 'Ca: 0.0003% or more and 0.0050% or less,', 'Mg: 0.0003% or more and 0.0050% or less, and', ' ...

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Номер записи: 28
03-01-2019 дата публикации

Method for producing a pre-coated metal sheet

Номер: US20190001438A1
Автор: Ehling Wolfram
Принадлежит: ArcelorMittal

This method for preparing a pre-coated metal sheet for welding thereof to another pre-coated metal sheet, containing the following successive steps: 133-. (canceled)34. A method for preparing a pre-coated metal sheet for welding thereof to another pre-coated metal sheet , comprising the following successive steps:providing a pre-coated metal sheet comprising a metal substrate provided, on at least one of its faces, with a pre-coating layer, thenremoving, on at least one face of said pre-coated metal sheet, at least part of said pre-coating layer so as to form a removal zone, said removal being done by an impact of a laser beam on said pre-coating layer, the removal step comprising, over the course of the removal, the relative displacement of said laser beam with respect to the metal sheet in a direction of advance,wherein during the removal, the laser beam is inclined relative to the face of the metal sheet such that the orthogonal projection of the laser beam on said face of the metal sheet is located in the zone of the metal sheet in which the removal has already been done, and wherein the laser beam forms an angle of inclination comprised between 12° and 50° with the direction normal to the face of the metal sheet.35. The method according to claim 34 , wherein the pre-coating layer is a layer of aluminum claim 34 , an aluminum-based layer or a layer of aluminum alloy.36. The method according to claim 34 , wherein the pre-coating layer is a layer of aluminum alloy further comprising silicon.37. The method according to claim 34 , wherein the angle of inclination of the laser beam is comprised between 15° and 45°.38. The method according to claim 34 , wherein the angle of inclination of the laser beam is comprised between 20° and 40°.39. The method according to claim 34 , wherein the angle of inclination of the laser beam is comprised between 25° and 40°.40. The method according to claim 34 , wherein the angle of inclination of the laser beam is comprised between 25 ...

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Номер записи: 29
07-01-2016 дата публикации

PROCESS FOR TREATING STEEL ALLOYS FOR GEARS

Номер: US20160002747A1
Автор: Anderson Neil E., Angus Todd J, Bean Mathew J, Ogden William P
Принадлежит:

A process for treating a steel alloy component includes the steps of: providing a steel alloy component having a plurality of teeth with a root portion and a tip; and processing the steel alloy so that the root portion of the gear teeth are hardened without through hardening of the tips of the gear teeth. 1. A process for treating a steel alloy component , comprising the steps of:providing a steel alloy component having a plurality of teeth with a root portion and a tip; andprocessing said steel alloy so that said root portion of said gear teeth are hardened without through hardening of the tips of the gear teeth.2. The process of claim 1 , wherein said processing step comprises: subjecting said steel alloy component to a pre-oxidation step in an air; and subjecting said steel alloy component to a carburization treatment.3. The process of claim 2 , wherein said pre-oxidation step comprises heat treating said steel alloy component in air at a temperature in the range of from 800 to 1300 degrees Fahrenheit for one hour.4. The process of claim 2 , wherein said processing step further comprises copper plating at least a portion of said steel alloy component prior to said pre-oxidation step.5. The process of claim 2 , wherein said carburization treatment is an atmospheric carburization treatment.6. The process of claim 2 , wherein said carburization treatment comprises placing said steel alloy component in a carburizing furnace and subjecting the steel alloy component to a temperature in the range of from 1650 to 1710 degrees Fahrenheit.7. The process of claim 2 , wherein said processing step further comprises subjecting said steel alloy component to an austenitizing treatment after said carburizing treatment.8. The process of claim 7 , wherein said austenitizing treatment is carried out at a temperature in the range of from 1650 to 1750 degrees Fahrenheit.9. The process of claim 7 , wherein said processing step further comprises quenching said steel alloy component at a ...

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Номер записи: 30
05-01-2017 дата публикации

Quench and temper corrosion resistant steel alloy

Номер: US20170002447A1
Автор: David E. Wert
Принадлежит: CRS Holdings LLC

A quench and temper steel alloy is disclosed having the following composition in weight percent. C 0.2-0.5 Mn 0.1-1.0 Si 0.1-1.2 Cr   9-14.5 Ni 2.0-5.5 Mo 1-2 Cu   0-1.0 Co 1-4 W 0.2 max. V 0.1-1.0 Ti up to 0.5 Nb   0-0.5 Ta   0-0.5 Al   0-0.25 Ce   0-0.01 La   0-0.01 The balance of the alloy is iron and the usual impurities including not more than about 0.01% phosphorus, not more than about 0.010% sulful, and not more than about 0.10% nitrogen. A quenched and tempered steel article made from this alloy is also disclosed. The steel article is characterized by a tensile strength of at least about 290 ksi, a fracture toughness (k Ic ) of at least about 65 ksi, good resistance to general corrosion, and good resistance to pitting corrosion.

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Номер записи: 31
07-01-2021 дата публикации

PRESS HARDENED STEEL WITH SURFACE LAYERED HOMOGENOUS OXIDE AFTER HOT FORMING

Номер: US20210002746A1
Автор: Lu Qi, WANG JIANFENG
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A press-hardened steel is provided. The press-hardened steel has an alloy matrix including from about 0.01 wt. % to about 0.35 wt. % carbon, from about 1 wt. % to about 9 wt. % chromium, from about 0.5 wt. % to about 2 wt. % silicon, and a balance of iron. The alloy matrix is greater than or equal to about 95 vol. % martensite. A first layer is disposed directly on the alloy matrix. The first layer is continuous, has a thickness of greater than or equal to about 0.01 μm to less than or equal to about 10 μm, and includes an oxide enriched with chromium and silicon. A second layer is disposed directly on the first layer, and includes an oxide enriched with Fe. Methods of preparing the press-hardened steel are also provided. 1. A press-hardened steel comprising: carbon (C) at a concentration of greater than or equal to about 0.01 wt. % to less than or equal to about 0.35 wt. %,', 'chromium (Cr) at a concentration of greater than or equal to about 1 wt. % to less than or equal to about 9 wt. %,', 'silicon (Si) at a concentration of greater than or equal to about 0.5 wt. % to less than or equal to about 2 wt. %, and', 'a balance of iron (Fe),', 'the alloy matrix being greater than or equal to about 95 vol. % martensite;, 'an alloy matrix comprisinga first layer disposed directly on the alloy matrix, the first layer being continuous, having a thickness of greater than or equal to about 0.01 μm to less than or equal to about 10 μm, and comprising an oxide enriched with Cr and Si; anda second layer disposed directly on the first layer, the second layer comprising an oxide enriched with Fe.2. The press-hardened steel according to claim 1 , wherein the alloy matrix further comprises:manganese (Mn) at a concentration of greater than or equal to about 0.01 wt. % to less than or equal to about 3 wt. %,molybdenum (Mo) at a concentration of greater than or equal to about 0.01 wt. % to less than or equal to about 0.8 wt. %,niobium (Nb) at a concentration of greater than or equal to ...

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Номер записи: 32
03-01-2019 дата публикации

METHOD AND SYSTEM FOR LASER HARDENING OF A SURFACE OF A WORKPIECE

Номер: US20190002997A1
Автор: DOMÍNGUEZ Jesús, GABILONDO Amaia, OCAÑA José Luis, SORIANO Carlos
Принадлежит:

A method of laser hardening of a surface area of a workpiece, such as a surface of a journal of a crankshaft, including the steps of generating a relative movement between the surface of the workpiece and a laser source to allow a laser spot to subsequently be projected onto different portions of the surface area, and during the relative movement, repetitively scanning the laser beam so as to produce a two-dimensional equivalent effective laser spot on the surface area. The energy distribution of the effective laser spot is adapted so that it is different in a more heat sensitive subarea, such as in an area adjacent to an oil lubrication opening, than in a less heat sensitive subarea, so as to prevent overheating of the more heat sensitive subarea. 1. An apparatus for hardening a surface area of a workpiece , the surface area comprising at least one less heat sensitive subarea and at least one more heat sensitive subarea , the apparatus comprising a laser source arranged to project an effective laser spot onto the surface area and means for generating relative movement between said surface area and the effective laser spot so that said effective laser spot is moved along said surface area so as to subsequently and progressively heat different portions of said surface area to a temperature suitable for hardening , whereby said effective laser spot is arranged to feature a two-dimensional energy distribution , the apparatus further comprising a control system for controlling operation of the apparatus , wherein said control system is arranged to modify said two-dimensional energy distribution so that it is different in said more heat sensitive subarea than in said less heat sensitive subarea.2. The apparatus according to claim 1 , wherein said at least one more heat sensitive subarea includesan area adjacent to a hole in the surface area, such as an oil lubrication hole; and/ora fillet, such as an undercut fillet; and/ora previously hardened portion of the surface ...

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Номер записи: 33
03-01-2019 дата публикации

Low Alloy Steels with Enhanced Toughness and Fatigue Strength at High Hardness

Номер: US20190002998A1
Автор: Cryderman Robert L.
Принадлежит:

Methods of forming low alloy steels and steels produced by such methods are provided. Various alloy additions and elements, as well as heating and tempering times and method steps are provided herein. Methods and materials of the present disclosure provide for enhanced fatigue at high hardness as compared with more brittle conventional steels. 1. A method of forming a steel alloy , comprising:providing a carbon steel with between approximately 0.40 and approximately 0.60 carbon by weight percent;adding at least one of manganese, nickel, molybdenum, and tungsten as an alloy addition wherein the at least one alloy addition comprises not more than approximately 2.2 weight percent of the combined carbon steel and the alloy addition;austenitizing the carbon steel and the at least one alloy addition for between 1500 seconds and 2000 seconds at 900 degrees Celsius and at 1150 degrees Celsius;quenching the carbon steel and the at least one alloy addition in the presence of helium;tempering the carbon steel and the at least one alloy addition at a temperature between approximately 150 degrees Celsius and 250 degrees Celsius;performing a further austenitizing step comprising at least one of induction heating and direct-resistance heating; andquenching and tempering the carbon steel and the at least one alloy addition at between approximately 150 degrees Celsius and 250 degrees Celsius.2. The method of claim 1 , wherein the at least one of induction heating and direct-resistance heating comprises providing the carbon steel and the at least one alloy addition at 850 degrees Celsius for 2 seconds claim 1 , at 950 degrees Celsius for 10 seconds claim 1 , and 1050 degrees Celsius for 1000 seconds.3. The method of claim 1 , wherein the step of quenching and tempering the carbon steel and the at least one alloy addition is performed at a temperature of approximately 200 degrees Celsius.4. The method of claim 1 , wherein at least one of the austenitizing steps is performed with a ...

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Номер записи: 34
03-01-2019 дата публикации

OIL-IMMERSION QUENCHING COOLING PRECURSOR AND OIL-IMMERSION QUENCHING COOLING METHOD

Номер: US20190003001A1
Автор: GE Shengdong, HAO Xuezhi, WANG Shui, ZHANG Kejian
Принадлежит:

An oil-immersion quenching cooling precursor and an oil-immersion quenching cooling method includes an axle-type workpiece or a workpiece that has sections in an axle form. Several separation rings are arranged on the workpiece in the axial direction to separate the axle-type workpiece or the workpiece that has sections in an axle form into a plurality of sections before oil-immersion quenching cooling. In the method, there is a cutting procedure before a quenching cooling procedure. Several separation rings distributed in the axial direction are reserved outside a dimension required for the workpiece. sections before oil-immersion quenching cooling. In the method, there is a cutting procedure before a quenching cooling procedure. Several separation rings distributed in the axial direction are reserved outside a dimension required for the workpiece. 1. An oil-immersion quenching cooling precursor of a workpiece that is of an axle type or has sections in an axle form , formed by arranging several separation rings on the axle-type workpiece or workpiece that has sections in an axle form in the axial direction to separate the workpiece into a plurality of sections , wherein , the workpiece is separated into a plurality of sections to expel gas bubbles.2. The oil-immersion quenching cooling precursor according to claim 1 , wherein claim 1 , the separation rings are distributed on an axial surface of the workpiece.3. The oil-immersion quenching cooling precursor according to claim 1 , wherein claim 1 , the separation rings are machined out integrally with the axle-type workpiece.4. The oil-immersion quenching cooling precursor according to claim 1 , wherein claim 1 , at least one separation ring is arranged on the workpiece.5. The oil-immersion quenching cooling precursor according to claim 1 , wherein claim 1 , the longitudinal cross section of the separation ring is in a rectangular shape claim 1 , sloped shape claim 1 , stepped shape claim 1 , triangular shape claim 1 ...

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Номер записи: 35
03-01-2019 дата публикации

Vehicle part having high strength and excellent durability, and manufacturing method therefor

Номер: US20190003004A1
Автор: Hwan-Goo Seong, Ki-Hyun Park, Yeol-Rae Cho, Youn-Il CHUNG
Принадлежит: Posco Co Ltd

Provided are a part for vehicle having high strength and excellent durability, and a manufacturing method therefor. The part for vehicle comprises, by a weight ratio, a composition comprising 0.20-0.50% of C, 0.5% or less of Si, 1.0-2.0% of Mn, 0.01-0.1% of Al, 0.010% or less of P, 0.003% or less of S, 0.01-0.1% of Ti, 0.05-0.5% of Cr, 0.05-0.3% of Mo, 0.01% or less of N, and the remainder being Fe and other inevitable impurities, and the part for vehicle can have, by an area ratio, a microstructure comprising 90% or more of tempered martensite, 4% or less of retained austenite, and the remainder being one type or both of two types selected from among the ferrite and bainite structures.

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Номер записи: 36
03-01-2019 дата публикации

Method for Producing a High Strength Steel Sheet Having Improved Strength and Formability, and Obtained High Strength Steel Sheet

Номер: US20190003007A1
Автор: JUN Hyun Jo, VENKATASURYA Pavan
Принадлежит:

A method for producing a steel sheet having a microstructure including 71% to 91% martensite and bainite, 9% to 13% retained austenite, and at most 20% ferrite is provided. The method includes providing a cold-rolled steel sheet including, in weight percent: 0.13%≤C≤0.22%, 1.2%≤Si≤2.3%, 0.02%≤Al≤1.0%, with 1.25%≤Si+Al≤2.35%, 2.4%≤Mn≤3%, Ti≤0.05%, Nb≤0.05% and a remainder of Fe and unavoidable impurities, annealing the steel sheet to obtain 80% to 100% austenite and 0% to 20% ferrite, quenching the steel sheet at a cooling rate between 20° C./s and 50° C./s to a quenching temperature between 240° C. and 310° C., heating the steel sheet to a partitioning temperature between 400° C. and 465° C. and maintaining the steel sheet at the partitioning temperature for 50 to 250 seconds, then immediately cooling the sheet to room temperature. Steel sheets are also provided. 117to . (canceled)18. A method for producing a steel sheet having a microstructure consisting of between 71% and 91% of a sum of martensite and bainite , between 9% and 13% retained austenite , and at most 20% ferrite , the method comprising the following successive steps: 0.13%≤C≤0.22%,', '1.2%≤Si≤2.3%,', '0.02%≤Al≤1.0%,', 'with 1.25%≤Si+Al≤2.35%,', '2.4%≤Mn≤3%,', 'Ti≤0.05%', 'Nb≤0.05%, and, 'providing a cold-rolled steel sheet, made of a steel having a chemical composition containing by weighta remainder, the remainder including Fe and unavoidable impurities;{'sub': 'A', 'annealing the steel sheet at an annealing temperature Tso as to obtain a structure comprising from 80% to 100% austenite and from 0% to 20% ferrite;'}quenching the steel sheet at a cooling rate between 20° C./s and 50° C./s down to a quenching temperature QT between 240° C. and 270° C.;heating the steel sheet up to a partitioning temperature PT between 440° C. and 460° ;maintaining the steel sheet at the partitioning temperature PT for a partitioning time Pt between 50 s and 250 s; andimmediately after the maintaining step, cooling the ...

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Номер записи: 37
03-01-2019 дата публикации

Method For Producing a High Strength Steel Sheet Having Improved Ductility and Formability, and Obtained Steel Sheet

Номер: US20190003008A1
Автор: GOSPODINOVA Maya, Hebert Veronique, VENKATASURYA Pavan
Принадлежит: ArcelorMittal

A method for producing a steel sheet is provided. The method includes providing a cold-rolled steel sheet including in weight %: 0.15%≤C≤0.23%, 1.4%≤Mn≤2.6%, 0.6%≤Si≤1.5%, 0.02%≤Al≤1.0%, with 1.0%≤Si+Al≤2.0%, 0≤Nb≤0.035%, 0≤Mo≤0.3%, 0≤Cr≤0.3%, and a remainder of Fe and unavoidable impurities, annealing the steel sheet at an annealing temperature between Ac1 and Ac3 to obtaining at least 40% austenite and at least 40% intercritical ferrite, quenching the sheet from at least 600° C. at a cooling rate of at least 20° C./s to a quenching temperature between 180° C. and 260° C., heating the sheet to a partitioning temperature between 375° C. and 470° C. and maintaining the sheet at this partitioning temperature for a partitioning time Pt between 25 s and 440 s, then cooling the sheet to room temperature. A steel sheet is also provided. 133-. (canceled)34. A method for producing a steel sheet having a tensile strength of at least 980 MPa , a total elongation of at least 16% , and a hole expansion ratio HER of at least 20% ,the method for producing the steel sheet comprising the successive steps of: 0.15%≤C≤0.23%,', '1.4%≤Mn≤2.6%,', '0.6%≤Si≤1.5%,', '0.02%≤Al≤1.0%,', 'with 1.0%≤Si+Al≤2.0%,', '0≤Nb≤0.035%,', '0≤Mo≤0.3%,', '0≤Cr≤0.3%,', 'Ni<0.05%,', 'Cu<0.03%,', 'V<0.007%,', 'B<0.0010%,', 'S<0.005%,', 'P<0.02%,', 'N<0.010%, and, 'providing a cold-rolled steel sheet, made of a steel having a chemical composition including by weighta remainder, the remainder including Fe and unavoidable impurities;annealing the steel sheet at an annealing temperature TA between Ac1 and Ac3 to obtain a structure including at least 40% austenite and at least 40% intercritical ferrite;quenching the steel sheet from a temperature of at least 600° C., at a cooling rate of at least 20° C./s, down to a quenching temperature QT between 180° C. and 260° C.;heating the steel sheet up to a partitioning temperature PT between 375° C. and 470° C.;maintaining the steel sheet at the partitioning temperature ...

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Номер записи: 38
02-01-2020 дата публикации

Gudgeon pin for internal combustion engines, system, engine and use of a gudgeon pin of this type

Номер: US20200003305A1
Автор: Klaus Lades, Ralf Meske, Roland Böhm
Принадлежит: Federal Mogul Nuernberg GmbH

The present invention is directed to a gudgeon pin for internal combustion engines, which gudgeon pin consists of case-hardened steel and is characterized in that a ratio of a residual wall thickness of the gudgeon pin to an overall thickness of a case-hardened layer is <2, and a ratio of the inner diameter and the outer diameter of the gudgeon pin is >60%. Furthermore, the present invention is directed to a system comprising the gudgeon pin according to the invention and a piston, wherein the piston has a piston boss with a transverse ovality which corresponds with an ovalization of the gudgeon pin under maximum ignition pressure. The invention also comprises an engine, in particular an internal combustion engine, having the gudgeon pin or the system comprising the gudgeon pin and the piston, and a use thereof for engines, in particular internal combustion engines.

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Номер записи: 39
13-01-2022 дата публикации

SCALLOP-RESISTANT TRACK LINK AND METHOD OF MAKING SAME

Номер: US20220009569A1
Автор: Steiner Kevin
Принадлежит: CATERPILLAR INC.

A track link includes an elongate link body formed of a link body material that varies in hardness to form a first lower hardness zone, a second lower hardness zone, and a higher hardness zone. The higher hardness zone includes an upper rail surface of the elongate link body and extends substantially throughout the elongate link body outside of the first and second lower hardness zones, which surround the track pin bores. Related methodology for making a track link is also disclosed. 1. A method of making a track link comprising:heat treating an elongate link body having a lower shoe-mounting surface and an upper rail surface such that a material extending throughout the elongate link body is hardened;tempering the elongate link body such that a portion of the material that is hardened and forms a first and a second track pin bore in the elongate link body is softened; andforming, by way of the heat treating and the tempering of the elongate link body, a scallop-retarding pattern of varying hardness where the elongate link body has a first lower hardness zone extending circumferentially around a first track pin bore, a second lower hardness zone extending circumferentially around a second track pin bore, and a higher hardness zone that includes the upper rail surface.2. The method of wherein the heat treating of the elongate link body includes hardening the material extending throughout the elongate link body to a hardness greater than 50 HRC.3. The method of wherein the tempering of the elongate link body includes softening the material that is hardened to a hardness less than 50 HRC.4. The method of wherein the forming of the scallop-retarding pattern of varying hardness further includes:forming a greater depth of the higher hardness zone from the upper rail surface to the lower shoe-mounting surface at a longitudinal location between the first and the second track pin bores; andforming a lesser depth of the higher hardness zone that extends from the upper rail ...

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Номер записи: 40
08-01-2015 дата публикации

METHOD AND APPARATUS FOR MICRO-TREATING IRON-BASED ALLOY, AND THE MATERIAL RESULTING THEREFROM

Номер: US20150007914A1
Автор: COLA, JR. Gary M., Ziolkowski Jeff W., Ziolkowski Todd C.
Принадлежит: SFP Works, LLC

The invention discloses a process and apparatus for micro-treating an iron-based alloy including heating and immediately quenching to room temperature to produce high tensile iron-based alloy with varying thicknesses. The process may or may not be practiced with or without tension, under various controllable tensions in order to create desirable effects. The micro-treated iron-based alloy contains desirable bainite to increase its formability and tensile strength. The varying thickness of the iron-based alloys is desirable for different applications, such as forming automobile panels. 56. A method of making a single layer automobile panel , comprising:providing a micro-treated integral single layer steel sheet with bainite formed in at least a portion thereof, and the sheet being made of varying thicknesses by heating up to a selected temperature and immediately quenching under various tensions; andstamping the steel to form an automobile door panel having a front pillar and a rear pillar, whereby the front and rear pillars of the automobile door panel include at least a portion of bainite formed therein, which exhibits extreme strength for its thickness.57. The method of claim 56 , wherein the microtreatment step that had been performed on the single layer steel sheet was accomplished by heating up to a selected temperature of at least approximately 1832° F. and substantially immediately quenching thereafter without any holding period at the elevated temperature.58. The method of claim 56 , wherein the step of providing a microtreated steel sheet heated up to a selected temperature and then quenched is accomplished by the quenching step being performed substantially immediately after the heating step claim 56 , and wherein there is no holding at the selected temperature between the steps of heating and the quenching.59. The method of claim 56 , wherein the heating step is accomplished while the steel sheet is under tension claim 56 , including a first micro- ...

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Номер записи: 41
20-01-2022 дата публикации

COLD ROLLED AND HEAT-TREATED STEEL SHEET AND METHOD OF MANUFACTURING THE SAME

Номер: US20220017985A1
Автор: ALEXANDRE Patrice, BOUZAT Magali, CHAKRABORTY Anirban, GHASSEMI-ARMAKI Hassan, GIRINA Olga, JACOLOT Ronan, KOLTSOV Alexey, NADLER Aude, PANAHI Damon, SOLER Michel
Принадлежит:

A cold rolled and heat-treated steel sheet having a composition including, by weight percent: C 0.3-0.4%, Mn 2.0-2.6%, Si: 0.8-1.6%, Al 0.01-0.6%, Mo 0.15-0.5%, Cr 0.3-1.0%, Nb≤0.06%, Ti≤0.06%, Ni≤0.8%, S≤0.010%, P≤0.020% and N≤0.008%, the remainder of the composition being iron and unavoidable impurities resulting from the smelting, and having a microstructure consisting of, in surface fraction: between 15% and 30% of retained austenite, said retained austenite having a carbon content of at least 0.7%, between 70% and 85% of tempered martensite, at most 5% of fresh martensite and at most 5% of bainite. It also deals with a manufacturing method thereof. 117-. (canceled)18. A cold-rolled and heat-treated steel sheet , made of a steel having a composition comprising , by weight percent:C: 0.3-0.4%Mn: 2.0-2.6%Si: 0.8-1.6%Al: 0.01-0.6%Mo: 0.15-0.5%Cr: 0.3-1.0%Nb≤0.06%Ti≤0.06%Ni≤0.8%S≤0.010%P≤0.020%N≤0.008%Cu≤0.03%and optionally one or more of the following elements, in weight percentage:B: 0.0003-0.005%V≤0.2%a remainder of the composition being iron and unavoidable impurities resulting from processing,the steel sheet having a microstructure consisting of, in surface fraction:between 15% and 30% of retained austenite, said retained austenite having a carbon content of at least 0.7%;between 70% and 85% of tempered martensite;at most 5% of fresh martensite; andat most 5% of bainite.19. The cold-rolled and heat-treated steel sheet as recited in wherein the chromium content is between 0.6% and 0.8%.20. The cold-rolled and heat-treated steel sheet as recited in wherein the silicon content is below 1.5%.21. The cold-rolled and heat-treated steel sheet as recited in wherein the silicon content is below 1.4%.22. The cold-rolled and heat-treated steel sheet as recited in wherein the silicon content is below 1.3%.23. The cold-rolled and heat-treated steel sheet as recited in wherein the cumulated amount of silicon and aluminum is equal to or above 1.6%.24. The cold-rolled and heat ...

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Номер записи: 42
08-01-2015 дата публикации

Variable Hardening Depth In Track Link For A Ground-Engaging Track

Номер: US20150008730A1
Автор: Caroline Marie Brewer, Gregory J. Kaufmann, Kevin Lee Steiner, Mark Steven Diekevers, Temitope Olayemi Akinlua, Timothy Arthur Thorson
Принадлежит: Caterpillar Inc

A track link for a ground-engaging track includes an elongate link body having a lower hardness material forming a lower mounting surface for mounting a track shoe, and a sacrificial higher hardness material forming an upper rail surface for contacting rotatable track engaging elements. The lower hardness and higher hardness materials transition at a material interface within the elongate link body, and the material interface is longitudinally non-uniform, such that the sacrificial higher hardness material has a varying depth from the upper rail surface to retard scalloping.

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Номер записи: 43
12-01-2017 дата публикации

PISTON RING AND ITS PRODUCTION METHOD

Номер: US20170009314A1
Автор: SHIMA Yuji
Принадлежит: Kabushiki Kaisha Riken

To provide a piston ring of low-alloy steel having excellent nitridability, namely, a piston ring of low-alloy steel having excellent thermal conductivity and capable of being provided with a sufficient nitrided layer, steel comprising by mass 0.45-0.65% of C, 0.15-0.35% of Si, 0.65-1.00% of Mn and 0.60-1.10% of Cr as indispensable alloy elements, and less than 0.35% of Mo, less than 0.25% of V and less than 0.001% of B as optional alloy elements, the total amount of the indispensable alloy elements and the optional alloy elements being less than 3.0% by mass, is formed into a piston ring; and the nitrided layer is formed on its surface. 1. A piston ring made of steel comprising C , Si , Mn and Cr as indispensable alloy elements , and Mo , V and B as optional alloy elements;said indispensable alloy elements having a composition comprising by mass 0.45-0.65% of C, 0.15-0.35% of Si, 0.65-1.00% of Mn, and 0.60-1.10% of Cr;said optional alloy elements having a composition comprising by mass less than 0.35% of Mo, less than 0.25% of V, and less than 0.001% of B;the total amount of said indispensable alloy elements and said optional alloy elements being less than 3.0% by mass; anda nitrided layer being formed on the surface.2. The piston ring according to claim 1 , wherein the outermost surface of said nitrided layer is a diffusion layer exposed by removing a compound layer.3. The piston ring according to claim 2 , which has hardness of 700 HV0.05 or more to the depth of 40 μm from said outermost surface.4. The piston ring according to claim 2 , which has a hardness reduction ratio of 3 HV0.05/μm or less in a depth direction to the depth of 40 μm from said outermost surface.5. The piston ring according to claim 1 , whose base material has hardness claim 1 , which is 90-100% of the hardness before nitriding.6. The piston ring according to claim 1 , wherein said steel contains C concentrated in prior austenite grain boundaries.7. The piston ring according to claim 1 , ...

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Номер записи: 44
08-01-2015 дата публикации

METHOD FOR PRODUCING PACKAGING STEEL

Номер: US20150010779A1
Автор: Matusch Dirk, Oberhoffer Helmut, Sauer Reiner, Schlupp Martin, Szesni Anika
Принадлежит:

The invention relates to a method for producing packaging steel consisting of a cold-rolled steel sheet made of unalloyed or low-alloy steel having a carbon content of less than 0.1%. In order to provide high-strength packaging steel that has good formability and high corrosion resistance and can be produced in as energy-saving a manner as possible, the steel sheet according to the invention is first coated with a metallic coating and then annealed in a recrystallising manner at a heating rate of more than 75 K/s and preferably more than 100 K/s to temperatures of more than 700° C., such that the metallic coating melts. The coated and annealed steel sheet is then quenched to normal temperature at a cooling rate of at least 100 K/s. 120-. (canceled)21. Method for the production of a packaging steel from a cold-rolled steel sheet of an unalloyed or low-alloy steel with a carbon content of less than 0.1% , wherein the steel sheet is first coated with a metallic coating and subsequently annealed to temperatures of more than 600° C. , in a recrystallizing manner , at a heating rate of more than 75 K/s , so that the metallic coating melts , and the coated and annealed steel sheet is subsequently quenched with a cooling rate of at least 100 K/s , whereby in the steel a multi-phase structure is formed , which comprises ferrite and at least one of the structural constituents martensite , bainite and/or residual austenite.22. Method according to claim 21 , wherein the coated steel sheet is annealed to temperatures of more than 700° C. claim 21 , in a recrystallizing manner claim 21 , at a heating rate of more than 100 K/s and subsequently quenched at a cooling rate of at least 500 K/s.23. Method according to claim 22 , wherein the coating steel sheet is quenched after the recrystallizing annealing at a cooling rate of more than 700 K/s claim 22 , and preferably at least 1000 K/s.24. Method according to claim 21 , wherein the steel hasa manganese content of less than 0.4 wt %, ...

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Номер записи: 45
14-01-2021 дата публикации

Hot press processing method and processing device

Номер: US20210008610A1
Автор: Chie OKAWA, Ichirou INO, Naoyuki IRIE, Yoshihide HIRAO
Принадлежит: Mazda Motor Corp

A hot press processing device 1 includes steps of: a heating step of heating a workpiece W; a press step of press-molding the workpiece W heated in the heating step; a cooling step of cooling a part of the workpiece W press-molded in the press step and causing it to undergo martensite transformation to form a hard zone Zh in the workpiece W, and cooling another part of the workpiece W and causing it to undergo ferrite/bainite transformation to form a soft zone Zs in the workpiece W. In the cooling step, the hot press processing device 1 cools a predetermined portion Zb in the soft zone Zs after increasing rigidity and hardness of the predetermined portion Zb.

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Номер записи: 46
27-01-2022 дата публикации

IMPACT AND WEAR RESISTANT COMPONENT, AND METHOD FOR PRODUCING THE SAME

Номер: US20220025475A1
Автор: Amada Eiji, AMATA Takafumi, HATANO Mamoru, KITAMURA Kouji, KOBAYASHI Naomi, Maeda Kazuo, Miyanishi Kei, NEISHI Yutaka, NISHIJIMA Ryoji, NODA Takashi, TAKIGUCHI Daisuke
Принадлежит:

A ripper shank as the impact and wear resistant component is made of a steel of a specific component composition which has a hardness of HRC 53 or more and HRC 57 or less. The steel includes a matrix including a martensite phase and a residual austenite phase, and first nonmetallic particles dispersed in the matrix and including at least one species selected from the group consisting of MnS, TiCN, and NbCN. The steel does not include a M23C6 carbide. 1. An impact and wear resistant component made of a steel containing not less than 0.41 mass % and not more than 0.44 mass % C , not less than 0.2 mass % and not more than 0.5 mass % Si , not less than 0.2 mass % and not more than 1.5 mass % Mn , not less than 0.0005 mass % and not more than 0.0050 mass % S , not less than 0.6 mass % and not more than 2.0 mass % Ni , not less than 0.7 mass % and not more than 1.5 mass % Cr , not less than 0.1 mass % and not more than 0.6 mass % Mo , not less than 0.02 mass % and not more than 0.03 mass % Nb , not less than 0.01 mass % and not more than 0.04 mass % Ti , not less than 0.0005 mass % and not more than 0.0030 mass % B , and not less than 20 mass ppm and not more than 60 mass ppm N , with the balance consisting of iron and unavoidable impurities , and having a hardness of HRC 53 or more and HRC 57 or less , a matrix including a martensite phase and a residual austenite phase, and', 'first nonmetallic particles dispersed in the matrix and including at least one species selected from the group consisting of MnS, TiCN, and NbCN,, 'the steel including'}{'sub': 23', '6, 'the steel not including a carbide represented as MC(where M represents the metallic elements constituting the steel).'}2. The impact and wear resistant component according to claim 1 , wherein the steel further contains at least one species selected from the group consisting of not less than 0.05 mass % and not more than 0.20 mass % V claim 1 , not less than 0.01 mass % and not more than 0.15 mass % Zr claim 1 , ...

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Номер записи: 47
14-01-2016 дата публикации

ROUGHLY SHAPED MATERIAL FOR INDUCTION HARDENED COMPONENTS AND METHOD FOR PRODUCING SAME

Номер: US20160010166A1
Автор: KOYAMA Tatsuya, Yoshida Suguru
Принадлежит:

A Roughly Shaped material for induction hardened components including: a. steel as a base metal including, as a chemical composition, by mass %, C: 0.35% to 0.6%, Si: 0.02% to 2.0%, Mn: 0.30% to 1.5%, Al: 0.001% to 0.5%, Cr: 0.05% to 2.0%. S: 0.0001% to 0.05%, N: 0.003% to 0.0120%, P: 0.03% or less. 0: 0.0050% or less, an iron nitride layer having a thickness of 0.1 μm to 50 μm in a. depth direction is formed at a surface, and a volume fraction of a γ′ phase, which is a Fe nitride, in the iron nitride layer, is 80% or more. 1. A Roughly shaped material for induction hardened components comprising:a steel as a base metal consisting of, as a chemical composition, by mass %,C: 0.35% to 0.6%,Si: 0.02% to 2.0%,Mn: 0.35% to 1.5%,Al: 0.001% to 0.5%,Cr: 0.05% to 2.0%,S: 0.0001% to 0.05%,N: 0.003% to 0.0120%,P: 0.03% or less,O: 0.0050% or less,B: 0% to 0.005%,W: 0% to 0.5%,Mo: 0% to 1.0%,V: 0% to 1.0%,Nb: 0% to 0.3%,Ti: 0% to 0.2%,Zr: 0% to 0.05%,Sb: 0% to 0.1%,Sn: 0% to 0.1%,Cu: 0% to 2.0%,Ni: 0% to 2.0%,Ca: 0% to 0.01%,Mg: 0% to 0.01%,Te: 0% to 0.1%, andthe balance consisting of Fe and impurities,wherein an iron nitride layer having a thickness of 0.1 μm to 50 μm in a depth direction is formed at a surface, anda volume fraction of a γ′ phase, which is a Fe nitride, in the iron nitride layer, is 80% or more.2. The Roughly shaped material for induction hardened components according to claim 1 , further comprising:a magnetite coating film having a thickness of 0.1 μm to 5 μm on a surface of the iron nitride layer.3. The Roughly shaped material for induction hardened components according to or claim 1 ,wherein the steel as the base metal includes, as a chemical composition, by mass %, one or more ofB: 0.0003% to 0.005%,W: 0.0025% to 0.5%,Mo: 0.05% to 1.0%,V: 0.05% to 1.0%,Nb: 0.005% to 0.3%,Ti: 0.005% to 0.2%, andZr: 0.0005% to 0.05%,Sb: 0.0005% to 0.1%,Sn: 0.01% to 0.1%,Cu: 0.01% to 2.0%,Ni: 0.01% to 2.0%Ca: 0.0005% to 0.01%,Mg: 0.0005% to 0.01%, andTe: 0.0005% to 0.1%.4. ( ...

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Номер записи: 48
14-01-2016 дата публикации

Method for Hot Forming, in Particular for Press Hardening

Номер: US20160010169A1
Автор: Banik Janko, Lenze Franz-Josef, Sikora Sascha
Принадлежит:

A method for hot forming, in particular for press hardening, a component is disclosed, wherein in a local region of the component a reduced martensitic hardness is produced by locally reducing a forming pressure which is exerted on a surface of the component. 1. Method for hot forming , comprising press hardening a component , wherein in a local region of the component a reduced martensitic hardness is produced by locally reducing a forming pressure which is exerted on a surface of the component.2. Method according to claim 1 , wherein regulating the locally reduced forming pressure is performed by an element which is spring-mounted in a lower tool and/or in an upper tool of a hardening tool.3. Method according to claim 2 , wherein a side of the spring-mounted element that faces the surface of the component contacts in a form-fitting manner the surface of the component claim 2 , and a forming accuracy in the local region conforms to a remaining forming accuracy in further regions of the component.4. Method according to claim 1 , wherein regulating the locally reduced forming pressure is implemented by a gas pressure spring and/or a disc spring and/or an elastic spring as a spring-mounted element.5. Method according to claim 2 , wherein the spring-mounted element is mounted in a die and/or mould region of the lower tool and/or of the upper tool of the hardening tool.6. Method according to claim 2 , wherein a hydraulic installation is embedded in the lower tool and/or in the upper tool of the hardening tool.7. Device for hot forming a component claim 2 , comprising a device configured for producing in a targeted manner a local region with a reduced martensitic hardness in the component claim 2 , by locally reducing a forming pressure which is exerted on a surface of the component to press harden the component.8. Device according to claim 7 , wherein the device comprises:a lower tool which is configured for receiving on an upper side a component in a form-fitting ...

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Номер записи: 49
14-01-2016 дата публикации

DIE STEEL AND METHOD FOR PRODUCING SAME

Номер: US20160010189A1
Автор: Hosoda Yasuhiro, KATAOKA Hitoshi, SEKIYAMA Takaaki, SUGANO Ryuuichiroh
Принадлежит: HITACHI METALS, LTD.

A mold steel that is a steel having a composition containing, in terms of mass %: 0.07 to 0.15% of C; more than 0 and less than 0.8% of Si; more than 0 and not more than 1.0% of Mn; less than 0.05% of P; less than 0.02% of S; more than 0 and not more than 0.5% of Ni; more than 0 and less than 0.8% of Mo and W, either alone or as a complex (Mo+1/2W); more than 0 and less than 0.15% of V; and 0.25 to 1.5% of Cu, with the balance consisting of Fe, Cr and unavoidable impurities, wherein the content of Cr is more than 4.9% and not more than 5.3% and the hardness of the mold steel is 30 to 42 HRC. 2. The mold steel according to claim 1 , wherein a value of following Expression 1 satisfies not greater than 1.70 by mass % claim 1 , and a value of following Expression 2 satisfies not greater than 6.90 by mass %:{'br': None, '70×[C %]+6×[Si %]−[Cr %]−3×[(Mo+1/2W)%]−3×[V %]−0.5×[Cu %];and\u2003\u2003Expression 1'}{'br': None, '[Cr %]+3.3×[(Mo+1/2W)%],\u2003\u2003Expression 2'}where characters in brackets [ ] indicate a content of each element by mass %.3. The mold steel according to claim 1 , wherein Al claim 1 , N and O in the inevitable impurities are regulated claim 1 , respectively claim 1 , to less than 0.1% claim 1 , less than 0.06% and less than 0.0055% claim 1 , by mass %.4. A method for producing a mold steel claim 1 , comprising quenching the steel and tempering the steel at a temperature of not lower than 530° C. to regulate a hardness of the steel to 30 to 42 HRC claim 1 , the steel having a composition comprising claim 1 , by mass %:0.07% to 0.15% of C;more than 0% and less than 0.8% of Si;more than 0% to 1.0% of Mn;less than 0.05% of P;less than 0.02% of S;more than 0% to 0.5% of Ni;one or both of Mo and W, where an amount of (Mo+1/2W) is in a range of more than 0% and less than 0.8%;more than 0% and less than 0.15% of V;0.25% to 1.5% of Cu, andthe balance of Fe, Cr and inevitable impurities, wherein a Cr content is more than 4.9% and not more than 5.3%.5. The ...

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Номер записи: 50
11-01-2018 дата публикации

PROCESS FOR MANUFACTURING STEEL SHEET HAVING VERY HIGH TENSILE STRENGTH, DUCTILITY AND TOUGHNESS CHARACTERISTICS, AND SHEET THUS PRODUCED

Номер: US20180010220A1
Автор: Allain Sebastien, Colin Christine, Couturier Audrey, Iung Thierry
Принадлежит:

The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an R/Rratio of less than 0.75 and an elongation at break of greater than %, the composition of which contains, the contents being expressed by weight: 0.10%≦C≦0.25%; 1%≦Mn≦3%; Al≧0.015%; Si≦1.985%; Mo≦0.30%; Cr≦1.5%; S≦0.015%; P≦0.1%; Co≦1.5%; B≦0.005%; it being understood that 1%≦Si+Al≦2%; Cr +(3×Mo)≦0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%. 1. A process for manufacturing a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa , an R/Rratio of less than 0.75 and an elongation at break of greater than 10% , the process comprising the steps of: 0.10%≦C≦0.25%;', '1%≦Mn≦3%;', 'Al≧0.015%;', 'Si≦1.985%;', 'Mo≦0.30%;', '0.3%≦Cr≦1.5%;', 'S≦0.015%;', 'P≦0.1%;', 'Co≦1.5%;', 'B≦0.005%;', 'wherein 1%≦Si+Al≦2% and Cr+(3×Mo)≧0.3%, and', 'a balance of the steel composition includes iron and inevitable impurities resulting from smelting;, 'supplying a steel composition comprising, the contents being expressed by weightcasting a semi-finished product from the steel composition;heating said semi-finished product to a temperature above 1150° C.;hot-rolling said semi-finished product in a temperature range in which the microstructure of the steel is entirely austenitic; then{'sub': DR', 'FR', 'R', 'DR', 'FR', 'FR', 'S', 'S', 's', 's', 's, 'cooling the sheet thus obtained from a temperature Tlying above Ar3 down to a transformation temperature Tin such a way that the primary cooling rate Vbetween Tand Tis between 50 and 90° C./s and the temperature Tis between B′and M+50° C., B′denoting a temperature defined relative to the bainite transformation start temperature B, and Mdenoting the martensite transformation start ...

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Номер записи: 51
14-01-2021 дата публикации

LOW-TEMPERATURE STEEL MATERIAL HAVING EXCELLENT TOUGHNESS IN WELDING PORTION THEREOF AND MANUFACTURING METHOD THEREFOR

Номер: US20210010114A1
Автор: LEE Hak-Cheol
Принадлежит:

Provided according to a preferable aspect of the present invention are a low-temperature steel material having excellent toughness in a welding portion thereof and a manufacturing method therefor, the low-temperature steel material comprising, by weight %, 0.02-0.06% of C, 6.0-7.5% of Ni, 0.4-1.0% of Mn, 0.02-0.15% of Si, 0.02-0.3% of Mo, 0.02-0.3% of Cr, 50 ppm or less of P, 10 ppm or less of S, 0.005-0.015% of Ti, 60 ppm or less of N, with a Ti/N weight % ratio of 2.5 of 4, and the balance of iron (Fe) and other inevitable impurities; and having: an effective grain size of 50 micrometers or less, with a boundary angle found to be 15 degrees or greater as measured by EBSD in an area of a fusion line (FL)-FL+1 mm in a weld heat-affected zone of a weld portion welded at a heat input of 5-50 kJ/cm; and an impact toughness of 70 J or higher at −196° C. as measured in an area of fusion line (FL)-FL+1 mm. 1. A low-temperature steel material having excellent welding-portion toughness , comprising:in weight %, 0.02 to 0.06% of C, 6.0 to 7.5% of Ni, 0.4 to 1.0% of Mn, 0.02 to 0.15% of Si, 0.02 to 0.3% of Mo, 0.02 to 0.3% of Cr, 50 ppm or less of P, 10 ppm or less of S, 0.005 to 0.015% of Ti, 60 ppm or less of N, a Ti/N weight % ratio of 2.5 of 4, and a balance of iron (Fe) and other unavoidable impurities,wherein in a weld heat-affected zone of a welding portion welded with a heat input of 5 to 50 kJ/cm, an effective grain size having a boundary angle of 15 degrees or greater in an area of a fusion line (FL) to FL+1 mm, measured by EBSD, is 50 micrometers or less, and an impact toughness measured in the area of the fusion line (FL) to FL+1 mm is 70 J or higher at −196° C.2. The low-temperature steel material having excellent welding-portion toughness of claim 1 , wherein a yield strength of the low-temperature steel material is 585 MPa or higher.3. The low-temperature steel material having excellent welding-portion toughness of claim 1 , wherein an impact transition ...

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Номер записи: 52
14-01-2021 дата публикации

Forged part of bainitic steel and a method of manufacturing thereof

Номер: US20210010117A1
Автор: Victor BORDEREAU
Принадлежит: ArcelorMittal SA

A steel for forging mechanical parts including of the following elements, expressed in percentage by weight: 0.15% ≤C≤ 0.22%; 1.6% ≤Mn≤ 2.2%; 0.6% ≤Si≤ 1%; 1% ≤Cr≤ 1.5%; 0.01% ≤Ni≤ 1%; 0% ≤S≤ 0.06%; 0% ≤P≤ 0.02%; 0% ≤N≤ 0.013%; and having optional elements 0% ≤Al≤ 0.06%; 0.03% ≤Mo≤ 0.1%; 0% ≤Cu≤ 0.5%; 0.01% ≤Nb≤ 0.15%; 0.01% ≤Ti≤ 0.03%; 0% ≤V≤ 0.08%; 0.0015% ≤B≤ 0.004%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel having microstructure by area percentage including of cumulative presence of residual austenite and martensite-austenite island between 1% and 20%, the remaining microstructure being bainite having at least 80%, wherein the fraction of grain boundaries of bainite with a misorientation angle of 59.5° are at least 7% and with an optional presence of martensite between 0% and 10%.

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Номер записи: 53
14-01-2021 дата публикации

HOT STAMPED ARTICLE

Номер: US20210010118A1
Автор: FUJINAKA Shingo, HIKIDA Kazuo, Tanaka Tomohito, TODA Yuri
Принадлежит: NIPPON STEEL CORPORATION

A hot stamped article of high strength steel sheet excellent in bending deformability having a predetermined chemical composition, having an area rate of 90% or more of the microstructures of the steel sheet comprised of one or more of lower bainite, martensite, and tempered martensite, and having a ratio of the length of grain boundaries with a rotational angle about a rotational axis of the <011> direction of the crystal grains of the lower bainite, martensite, and tempered martensite of 15 or more with respect to the length of grain boundaries with a rotational angle of 5° to 75° of 80% or more. 1. A hot stamped article , having a chemical composition comprising , by mass % ,C: 0.35% to 0.75%,Si: 0.005% to 0.25%,Mn: 0.5% to 3.0%,sol. Al: 0.0002% to 3.0%,Cr: 0.05% to 1.00%,B: 0.0005% to 0.010%,Nb: 0.01% to 0.15%,Mo: 0.005% to 1.00%,Ti: 0% to 0.15%,Ni: 0% to 3.00%,P: 0.10% or less,S: 0.10% or less,N: 0.010% or less anda balance of Fe and unavoidable impurities,microstructures in which at least one of lower bainite, martensite, and tempered martensite are contained with an area rate of 90% or more, andwhen the <011> direction of the crystal grains of the lower bainite, martensite, and tempered martensite is a rotational axis, a ratio of a length of grain boundaries with a rotational angle 15° or more to a length of grain boundaries with a rotational angle of 5° to 75° is 80% or more.2. A hot stamped article according to claim 1 , wherein the hot stamped article comprises a plated layer. The present invention relates to a hot stamped article having particularly excellent bending deformability used for structural members or reinforcing members of automobiles or structures where strength is required.In recent years, from the viewpoints of environmental protection and resource saving, lighter weight of automobile bodies is being sought. For this reason, application of high strength steel sheet to automobile members has been accelerating. However, along with the increase ...

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Номер записи: 54
10-01-2019 дата публикации

RAPID-COOLING QUENCHING APPARATUS AND RAPID-COOLING QUENCHING METHOD

Номер: US20190010564A1
Автор: Hashimukai Tomohiro, Sugihara Hirokazu, Tanaka Fujio, Yoshimoto Soshi
Принадлежит: JFE STEEL CORPORATION

A rapid-cooling quenching apparatus in which a high-temperature metal sheet is dipped and cooled in a liquid and a rapid-cooling quenching method for a steel sheet are provided. The rapid-cooling quenching apparatus includes a water tank containing the liquid in which the metal sheet is dipped, a jetting device having a plurality of nozzles through which the liquid is jetted onto front and back surfaces of the metal sheet and at least some of which are placed in the liquid in the water tank, and a pair or a plurality of pairs of restraining rolls which are placed between an entrance-side end of the jetting device and an exit-side end of the jetting device and restrain the metal sheet, in which nozzles nearest to the restraining rolls are inclined toward the restraining rolls from a horizontal plane in the jetting device. 1. A rapid-cooling quenching apparatus in which a high-temperature metal sheet is dipped and cooled in a liquid , the apparatus comprising:a water tank containing the liquid in which the metal sheet is dipped,a jetting device having a plurality of nozzles through which the liquid is jetted onto front and back surfaces of the metal sheet and at least some of which are placed in the liquid in the water tank, anda pair of restraining rolls which are placed between an entrance-side end of the jetting device and an exit-side end of the jetting device and restrain the metal sheet,wherein nozzles nearest to the restraining rolls are inclined toward the restraining rolls from a horizontal plane in the jetting device.2. A rapid-cooling quenching apparatus in which a high-temperature metal sheet is dipped and cooled in a liquid , the apparatus comprising:a water tank containing the liquid in which the metal sheet is dipped,a jetting device having a plurality of nozzles through which the liquid is jetted onto front and back surfaces of the metal sheet and at least some of which are placed in the liquid in the water tank, anda plurality of pairs of restraining ...

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Номер записи: 55
10-01-2019 дата публикации

HIGH HARDNESS WEAR-RESISTANT STEEL WITH EXCELLENT TOUGHNESS AND CUTTING CRACK RESISTANCE AND METHOD FOR MANUFACTURING SAME

Номер: US20190010571A1
Автор: KANG Sang-Deok, KIM Sung-Kyu, KIM Yong-Jin, LEE Un-Hae, YI Il-Cheol
Принадлежит:

The present invention relates to a high hardness wear-resistant steel with excellent toughness and cutting crack resistance, and a method for manufacturing the same. A high hardness wear-resistant steel according to one aspect of the present invention has a composition containing, by weight ratio, 2.1 to 4.0% of manganese (Mn), 0.15 to 0.2% of carbon (C), 0.02 to 0.5% of silicon (Si), 0.2 to 0.7% of chromium (Cr), a remainder of iron (Fe) and other unavoidable impurities, has a microstructure in which prior austenite grain size is 25 μm or less and martensite is included as a main phase, and has excellent toughness and cutting crack resistance which satisfies a condition in which Ac3-Ac1 is 100° C. or lower. 1. A high hardness wear-resistant steel:having a composition containing, by weight ratio, 2.1 to 4.0% of manganese (Mn), 0.15 to 0.2% of carbon (C), 0.02 to 0.5% of silicon (Si), 0.2 to 0.7% of chromium (Cr), a remainder of iron (Fe) and other unavoidable impurities;having a microstructure in which prior austenite grain size is 25 μm or less and martensite is included as a main phase; andhaving excellent toughness and cutting crack resistance which satisfies a condition in which Ac3-Ac1 is 100° C. or lower.2. The high hardness wear-resistant steel according to claim 1 , further comprising claim 1 , by weight ratio claim 1 , 0.1% or less of niobium (Nb) claim 1 , 0.02% or less of boron (B) claim 1 , and 0.1% or less of titanium (Ti).3. The high hardness wear-resistant steel according to claim 1 , wherein the structure of martensite comprises 95% or more in area fraction.4. The high hardness wear-resistant steel according to claim 1 , wherein Brinell hardness is 420 to 480 claim 1 , and Charpy impact energy is 35 J or more at −40° C.5. The high hardness wear-resistant steel according to claim 1 , wherein the martensite does not contain carbides therein.6. A method of manufacturing a high hardness wear-resistant steel having excellent toughness and cutting crack ...

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Номер записи: 56
10-01-2019 дата публикации

Large crankshaft

Номер: US20190010589A1
Автор: Hiroyuki Takaoka, Mariko Yamada
Принадлежит: Kobe Steel Ltd

Provided is a large crankshaft comprising a pin fillet portion, wherein: an average initial compression stress in a surface layer region from a surface of the pin fillet portion to a depth of 500 μm is 500 Mpa or more; an average Vickers hardness of the surface of the pin fillet portion is 600 or more; an arithmetic average roughness Ra of the surface of the pin fillet portion is 1.0 μm or less; and an average prior austenite grain size of a metallographic structure is 100 μm or less. The large crankshaft has composition comprising C: 0.2% by mass to 0.4% by mass, Si: 0% by mass to 1.0% by mass, Mn: 0.2% by mass to 2.0% by mass, Al: 0.005% by mass to 0.1% by mass, N: 0.001% by mass to 0.02% by mass, and a balance being Fe and inevitable impurities.

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Номер записи: 57
12-01-2017 дата публикации

HIGH FREQUENCY INDUCTION CONTINUOUS HEATING METHOD AND HIGH FREQUENCY INDUCTION CONTINUOUS HEATING APPARATUS

Номер: US20170013682A1
Автор: MIYASHITA Kouichi, Sakuma Toshiyuki, Suenaga Akira
Принадлежит:

A high frequency induction continuous heating method and a high frequency induction continuous heating apparatus are provided, and they can improve a working efficiency of a heating treatment and can also improve an uniformity of the heating treatment for an entirety of a work piece corresponding to multiple types of work pieces. In the high frequency induction continuous heating method in which a work piece (W) placed on a conveyance surface () of a conveyor () is conveyed, and the work piece (W) on the conveyance surface () is heated by high frequency induction heating coils () which are disposed at both ends of the conveyor () in a crosswise direction perpendicular to a conveyance direction (shown by an arrow (D) in the drawing), the work piece (W) is rotated around an axis which is extended so as to be perpendicular to the conveyance surface (), at a certain rotation angle (θ) in mid-flow of the conveyance of the work piece (W) to change an orientation of the work piece (W). The high frequency induction continuous heating apparatus () uses the above-described method. 1. A high frequency induction continuous heating apparatus comprising:a conveyance surface on which a work piece is placed;a conveyor configured to convey the work piece on the conveyance surface;high frequency induction heating coils disposed at both ends of the conveyor in a crosswise direction perpendicular to a conveyance direction, and configured to heat the work piece on the conveyance surface; anda work piece rotating mechanism configured so as to rotate the work piece around an axis which is extended so as to be perpendicular to the conveyance surface, at a certain rotation angle in mid-flow of conveyance of the work piece so that an orientation of the work piece is changed.2. The high frequency induction continuous heating apparatus according to claim 1 , whereinafter the work piece is rotated by the work piece rotating mechanism in a state in which the conveyance of the work piece has been ...

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Номер записи: 58
19-01-2017 дата публикации

Wear Part with Hardfacing and Method of Making Same

Номер: US20170014901A1
Автор: Kendall R. Powell
Принадлежит: Caterpillar Inc

A wear part includes a body and a cladding layer. The body includes an outer surface. The body is made from a base material. The cladding layer is connected to the outer surface of the body. The cladding layer is constructed with the body via additive manufacturing. The cladding layer is made from a surfacing material which is harder than the base material.

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Номер записи: 59
15-01-2015 дата публикации

Infrared heating device

Номер: US20150016810A1
Автор: Keitaro Mineoka
Принадлежит: Toyoda Iron Works Co Ltd

Infrared heating apparatus irradiates a member to be heated with infrared rays from infrared source to heat the member, and sets heated region of the member to be heated with use of shielding member that restricts transmission of infrared rays. The infrared heating apparatus includes: a pair of holding members each having a plate shape that allow the infrared rays to be transmitted therethrough being disposed to intersect with an irradiation direction of the infrared rays between the infrared source and the member to be heated, and the shielding member being interposed and held between the holding members, and being a metal sheet, metal foil or a metal film, which has a prescribed shape that restricts transmission of the infrared rays, and the holding members being placed on each other to be in close contact with each other while the shielding member is interposed between the holding members.

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Номер записи: 60
03-02-2022 дата публикации

Heat treatment method

Номер: US20220033923A1
Автор: Etsunori Fujita, Katsuyoshi Kuwata, Seiya Yoshida
Принадлежит: Delta Kogyo Co Ltd

To reduce the roughening of a surface of a workpiece whose hardness is increased by heat treatment. In a workpiece such as a guide plate (11), not a surface (11a1) of a groove (11a) that is a desired part for hardening (hardening target position) but a surface (11a2) opposite the surface (11a1) is heat-treated as a surface to be heated that is to be directly heated by an induction heating device. This can inhibit the surface (11a1) of the hardening target position from being roughened by the heat treatment and becoming lower in surface precision than before the heat treatment. Further, according to the present invention, the use of the induction heating device makes it possible to heat-treat only a necessary part.

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Номер записи: 61
03-02-2022 дата публикации

Method of manufacturing a 2xxx-series aluminium alloy plate product having improved fatigue failure resistance

Номер: US20220033937A1
Автор: Achim Burger, Andreas Harald BACH, Philippe Meyer, Sabine Maria Spangel
Принадлежит: ALERIS ROLLED PRODUCTS GERMANY GMBH

A method of manufacturing an AA2xxx-series aluminium alloy plate product having improved fatigue failure resistance and a reduced number of flaws, the method comprising the following steps (a) casting an ingot of an aluminium alloy of the 2xxx-series, the aluminium alloy comprising (in wt. %): Cu 1.9 to 7.0, Mg 0.3 to 1.8, Mn up to 1.2, balance aluminium and impurities, each 0.05 max., total 0.15; (b) homogenizing and/or preheating the cast ingot; (c) hot rolling the ingot into a plate product by rolling the ingot with multiple rolling passes characterized in that, when at an intermediate thickness of the plate between 100 and 200 mm, at least one high reduction hot rolling pass is carried out with a thickness reduction of at least 15%; wherein the plate product has a final thickness of less than 60 mm. The invention is also related to an aluminium alloy product produced by this method.

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Номер записи: 62
15-01-2015 дата публикации

BASE METAL FOR HIGH-TOUGHNESS CLAD PLATE HAVING EXCELLENT TOUGHNESS AT WELDED JOINT AND METHOD OF MANUFACTURING THE CLAD PLATE

Номер: US20150017476A1
Автор: Hoshino Toshiyuki, Kishi Keiichiro, Kuronuma Yota, Nishimura Kimihiro, Sueyoshi Hitoshi, Tachibana Shunichi, Yazawa Yoshihiro
Принадлежит:

A base metal for high-toughness clad plate having excellent toughness at a welded joint contains, in terms of mass %, C: 0.030 to 0.10%, Si: 0.10 to 0.30%, Mn: 1.00 to 1.60%, P: 0.015% or less, S: 0.003% or less, V: less than 0.010%, and at least one selected from Mo: 0.05 to 0.50%, Nb: 0.010 to 0.060%, Ti: 0.005 to 0.020%, Al: 0.040% or less, Ca: 0.0010 to 0.0040%, and N: 0.0030 to 0.0060%, the balance being Fe and unavoidable impurities, in which a percent ductile fracture is 85% or more in a −20° C. DWTT test and vE−20° C. is 100 J or more at a HAZ 3 mm position. 1. A base metal for a high-toughness clad plate having excellent toughness at a welded joint , the base metal comprising , in terms of mass % , C: 0.030 to 0.10% , Si: 0.10 to 0.30% , Mn: 1.00 to 1.60% , P: 0.015% or less , S: 0.003% or less , V: less than 0.010% , and at least one selected from Mo: 0.05 to 0.50% , Nb: 0.010 to 0.060% , Ti: 0.005 to 0.020% , Al: 0.040% or less , Ca: 0.0010 to 0.0040% , and N: 0.0030 to 0.0060% , the balance being Fe and unavoidable impurities , wherein a percent ductile fracture is 85% or more in a −20° C. DWTT test and vE−20° C. is 100 J or more at a HAZ 3 mm position.2. The base metal according to claim 1 , further comprising claim 1 , in terms of mass % claim 1 , at least one selected from Ni: 1.00% or less claim 1 , Cr: 1.00% or less claim 1 , and Cu: 1.00% or less.3. The base metal according to claim 1 , wherein a ratio of Ti content to N content claim 1 , Ti/N claim 1 , is 2.0 to 3.5 where the element symbols represent contents of respective elements in terms of mass %.4. The base metal according to claim 1 , wherein a ratio of Nb content to C content claim 1 , Nb/C claim 1 , is 0.2 to 2.0 where the element symbols represent contents of respective elements in terms of mass %.5. The base metal according to claim 3 , wherein a ratio of Nb content to C content claim 3 , Nb/C claim 3 , is 0.2 to 2.0 where the element symbols represent contents of respective elements in ...

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Номер записи: 63
18-01-2018 дата публикации

METHOD FOR THE PRODUCTION OF A SINTERED GEAR

Номер: US20180015546A1
Автор: Dickinger Karl, DLAPKA Magdalena, DUMANSKI Christian, HEISSL Martin
Принадлежит: MIBA SINTER AUSTRIA GMBH

The invention relates to a method for producing a sintered gear comprising a gear body on which at least one elastomer element is arranged, according to which a green compact is produced by pressing a powder, the green compact is sintered into a gear body and is hardened by carburization and subsequent quenching or sinter-hardening and subsequent quenching with a gas and afterwards the at least one elastomer element is vulcanized onto the gear body. 1. A method for producing a sintered gear comprising a gear body on which at least one elastomer element is arranged , according to which a green compact is produced by pressing a powder , the green compact is sintered into a gear body and is hardened by carburization and subsequent quenching or sinter-hardening and subsequent quenching and after this the at least one elastomer element is vulcanized onto the gear body , wherein the hardened gear body is quenched with a gas.2. The method as claimed in claim 1 , wherein the carburization of the gear body is performed by means of low-pressure carburization.3. The method as claimed in claim 1 , wherein a sinter-hardenable powder is used to produce the green compact.4. The method as claimed in claim 3 , wherein a sinter-hardenable powder is used which includes a proportion of chromium which is between 1 wt. % and 5 wt. %.5. The method as claimed in claim 1 , wherein the gear body is compacted to a density of between 6.8 g/cmand 7.4 g/cm.6110. The method as claimed in claim 1 , wherein the gear body is produced to have a roughness depth on its surface which is Rz and Rz.7. The method as claimed in claim 1 , wherein the carburization is performed to a depth of the gear body claim 1 , measured from its surface claim 1 , which is selected from a range of 100 μm to 2000 μm.8. The method as claimed in claim 1 , wherein the gas quenching is performed with N2 claim 1 , N2/H2 or He as the gas.9. The method as claimed in claim 1 , wherein the gear body is quenched at a quenching speed ...

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Номер записи: 64
19-01-2017 дата публикации

HEAT TREATMENT SYSTEM AND HEAT TREATMENT METHOD

Номер: US20170016082A1
Автор: MASUDA Ryuhei, NIWA Kiyokazu, NOBATA Seiji, NOJO Daisuke, SUGA Nobuyuki, TAKEUCHI Yugo, UCHIDA Kenzo, XUE Weidong
Принадлежит: TOPY KOGYO KABUSHIKI KAISHA

The present invention addresses the issue of providing a heat treatment system and a heat treatment method whereby the inner circumference of a cylindrical workpiece can be reliably cooled regardless of the dimensions or shape of the workpiece and productivity can be improved, during quenching of the inner circumference of the cylindrical workpiece. The present invention has: rotating devices that rotate the cylindrical workpiece : holding members that hold the cylindrical workpiece at a prescribed position; a heating member that heats the cylindrical workpiece from the inner circumferential surface side; a cooling device that injects cooling fluid and cools the cylindrical workpiece from the outer circumferential surface side; and a injecting device provided at a position separated from the cooling device and which inject the cooling fluid. 1. A heat treatment system , characterized in that said system comprises:a rotating device which rotates a cylindrical workpiece;a holding member which holds the cylindrical workpiece at a predetermined position;a heating member which heats the cylindrical workpiece from an inner circumferential surface side;a cooling device which cools the cylindrical workpiece from an outer circumferential surface side by injecting a cooling liquid;an injecting device which is mounted at a position remote from the cooling device and injects the cooling liquid;a heating member holding member which hold the heating member fixedly in position;a cooling device holding member which hold the cooling device fixedly in position; anda base member to which the rotating device and the injecting device are attached and which moves relative to the heating member and the cooling device, whereinthe heating member has a function for heating the inner circumferential surface side of the cylindrical workpiece in a case that the base member moves and the heating member is positioned in a radial inner region of the cylindrical workpiece which has been held by the ...

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Номер записи: 65
21-01-2016 дата публикации

LOCALIZED HARDENING OF METALLIC SURFACES

Номер: US20160017450A1
Автор: Kislov Stanislav, Kislov Valentin
Принадлежит:

The present invention relates to a method and system for treatment of a surface of a metallic material component, the method comprising the steps: electro-spark treating the surface of the metallic component by means of an electro-spark electrode, wherein the metallic material is a basically ferritic, perlitic and/or austenitic steel and the method creates a thin layer with martensitic microstructures at the surface of the metallic material component. Serpentines and quartz can be incorporated by an additional step as well as the surface randomly structured by this.

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Номер записи: 66
21-01-2016 дата публикации

METHOD OF MAKING A DUAL HARDNESS STEEL ARTICLE

Номер: US20160017455A1
Автор: Bailey Ronald E., Stefansson Njall, Swiatek Glenn J.
Принадлежит:

A dual hardness steel article comprises a first air hardenable steel alloy having a first hardness metallurgically bonded to a second air hardenable steel alloy having a second hardness. A method of manufacturing a dual hard steel article comprises providing a first air hardenable steel alloy part comprising a first mating surface and having a first part hardness, and providing a second air hardenable steel alloy part comprising a second mating surface and having a second part hardness. The first air hardenable steel alloy part is metallurgically secured to the second air hardenable steel alloy part to form a metallurgically secured assembly, and the metallurgically secured assembly is hot rolled to provide a metallurgical bond between the first mating surface and the second mating surface. 1. A method of manufacturing a dual hardness steel article , comprising:providing a first air hardenable steel alloy part comprising a first mating surface and having first part hardness;providing a second air hardenable steel alloy part comprising a second mating surface and having a second part hardness, wherein the first part hardness is greater than the second part hardness;disposing the first air hardenable steel alloy part and the second air hardenable steel alloy part so that at least a portion of the first mating surface contacts at least a portion of the second mating surface;metallurgically securing the first air hardenable steel alloy part to the second air hardenable steel alloy to form a metallurgically secured assembly;hot rolling the metallurgically secured assembly to form a metallurgical bond between the first mating surface and the second mating surface;cooling the hot rolled assembly.2. The method of claim 1 , further comprising grinding at least a portion of at least one of the first mating surface and the second mating surface prior to the disposing.3. The method of claim 1 , wherein metallurgically securing the first air hardenable steel alloy part to the ...

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Номер записи: 67
21-01-2016 дата публикации

Structural Steel For Through-Surface Hardening

Номер: US20160017468A1
Автор: Alexey Alexandrovich Kupriyanov, Anatoliy Alexeevich Kuznetsov, Arkadiy Moiseevich Peker, Igor Semyonovich Lerner
Принадлежит: Individual

The invention refers to development of chemical composition of perlite-class structural steels hardened by thermal treatment—through-surface hardening (TSH). The technical result is to obtain low and specified hardenability 3rd generation LH (SH) steels with a finer austenite grain ##11-13 GOST5639 (ASTM), even more stable preset hardenability (DI) with a substantially smaller To obtain a finer austenite grain and more stable hardenability—DI, with a substantially smaller deviation range and hardened layer depth directly obtained on parts subjected to TSH, as well as the possibility of machining thinner, smaller and other parts with the through-surface and through-thickness hardening. To achieve the technical result, structural steel was proposed for through-surface hardening with the following components ratio, weight %: carbon—0.15-1.2; manganese—not more than 1.8; silicon—not more than 1.8; chrome—not more than 1.8; nickel—not more than 1.8; molybdenum—not more than 0.5; tungsten—not more than 1.5; boron—not more than 0.007; copper—not more than 0.3; aluminum—0.03-0.1; nitrogen—not more than 0.1; titanium—not more than 0.4; vanadium,—not more than 0.4; zirconium—not more than 0.4; niobium—not more than 0.1; tantalum—not more than 0.1; calcium—not more than 0.03; sulphur—not more than 0.035; phosphorus—not more than 0.035; iron and unavoidable admixtures—rem., with ideal diameter determined by the following mathematical formula: Dkp.=K·√C·(1+4.1·Mn)·(1+0.65·Si)·(1+2.33·Cr)·(1+0.52·Ni)·(1+0.27·Cu)··(1+3.14·Mo)·(1+1.05·W)·[1+1.5(0.9−C)]·(1−0.45C′)·(1−0.3Ti)·(1−0.35V)·(1−0.25Al), Where: Dcr is the ideal diameter, mm, K is the coefficient whose value depends on the actual austenite grain size according to the ASTM, GOST5639; C, Mn, Si, Cr, Ni, Cu, Mo, W are components, weight %, contained in the austenite solid solution at the final heating temperature preceding hardening cooling, [1+1.5(0.9−C)] is the multiplier taken into account only if boron is present in steel in ...

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Номер записи: 68
18-01-2018 дата публикации

Method and Device for Production of Heat Treated Welded Rail for Rail Transport and Rail Produced Therewith

Номер: US20180016654A1
Автор: Pyke Daniel Jonathan, Smith Howard Martin
Принадлежит:

The present invention relates to a method and device for the production of heat treated welded rail for rail transport, such as railways and tramways. The invention also relates to a rail produced with the method and/or the device. 1. A method for the production of heat treated welded rail for rail transport comprising the subsequent steps of:i. providing rail lengths to desired specificationsii. welding two rail lengths together in a welding unit to produce a continuous welded rail, CWR, or producing a longer continuous welded rail by welding one or more additional rail lengths to the continuous welded rail; and{'sub': 3', '3', 'a', 'stop, 'iii. post-welding heat treating the entire continuous welded rail in a heat treatment unit by heating the entire continuous welded rail, or by heating all successive cross-sections of the continuous welded rail, to above the Ac-temperature to achieve a fully austenitic microstructure in the entire continuous welded rail, followed by holding the continuous welded rail or all successive cross-sections of the continuous welded rail section above Acfor a prescribed time tfollowed by subjecting the continuous welded rail or all successive cross-sections of the continuous welded rail to cooling at a cooling rate using a cooling medium to a prescribed cooling stop temperature Tto achieve the desired transformed final microstructure and properties along the entire length of the post-welding heat treated continuous welded rail.'}2. The method according to wherein the continuous welded rail is heat treated at a constant feed rate of at least 0.5 and/or at most 10 m·min.3. (canceled)4. The method according to claim 1 , wherein the continuous welded rail is produced by welding together lengths of steel having a composition suitable for obtaining a microstructure which is substantially eutectoid or hypereutectoid after heat treatment claim 1 , wherein the cooling stop temperature is below Ar claim 1 , and wherein the transformed final ...

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Номер записи: 69
17-01-2019 дата публикации

METHOD OF HEAT TREATING A FASTENING MEMBER

Номер: US20190017141A1
Автор: Liu Tianjun
Принадлежит: CATERPILLAR INC.

A method of heat treating a fastening member having a head portion, a shank portion, and a thread portion includes hardening the fastening member to a first hardness value. Hardening of the fastening member includes heating the fastening member at a first pre-set temperature value. The method also includes tempering the fastening member at a second pre-set temperature value to a second hardness value. The method further includes induction tempering the thread portion of the fastening member. Induction tempering of the thread portion includes heating the thread portion at a third pre-set temperature value to a third hardness value. The third hardness value of the thread portion is less than the second hardness value of the head portion and the shank portion. 1. A method of heat treating a fastening member , the fastening member including a head portion , a shank portion , and a thread portion , the method comprising:hardening the fastening member to a first hardness value, wherein hardening of the fastening member includes heating the fastening member at a first pre-set temperature value;tempering the fastening member at a second pre-set temperature value to a second hardness value; andinduction tempering the thread portion of the fastening member, wherein induction tempering of the thread portion includes heating the thread portion at a third pre-set temperature value to a third hardness value, wherein the third hardness value of the thread portion is less than the second hardness value of the head portion and the shank portion.2. The method of further including quenching the fastening member using a fluid medium upon heating the fastening member at the first pre-set temperature value claim 1 , wherein the fluid medium is selected based on a material of the fastening member.3. The method of claim 1 , wherein the first pre-set temperature value lies between 800° C. and 950° C.4. The method of claim 1 , wherein the first pre-set temperature value lies is an ...

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Номер записи: 70
17-01-2019 дата публикации

Steel sheet for hardening, hardened member, and method for manufacturing steel sheet for hardening

Номер: US20190017142A1
Автор: Hiroyuki Omori, Sae Hamamoto, Tatsuya Asai
Принадлежит: Kobe Steel Ltd

An aspect of the present invention is a steel sheet for quench hardening, satisfying a prescribed composition and having a Mn concentration satisfying the formula (1): S1+S2<−10×[Mn]+44 (1), where [Mn] is Mn concentration in a steel sheet analyzed by inductively coupled plasma emission spectrography (% by mass); S1 is an area % of the region where the Mn concentration analyzed by an electron beam microprobe analyzer in the structure at a position of ¼ of the steel sheet thickness is two times or more the [Mn]; and S2 is an area % of the region where the Mn concentration analyzed by an electron beam microprobe analyzer in the structure at a position of ¼ of the steel sheet thickness is 0.5 times or less the [Mn].

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Номер записи: 71
17-01-2019 дата публикации

Propeller blades

Номер: US20190017395A1
Автор: Christian Fages
Принадлежит: Ratier Figeac SAS

A propeller blade retention element comprises a body portion formed of a corrosion resistant metal, and at least one bearing race portion attached to the body portion, the race portion being formed of an induction hardenable, corrosion resistant metal.

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Номер записи: 72
22-01-2015 дата публикации

COMPOSITE STEEL PART AND MANUFACTURING METHOD FOR THE SAME

Номер: US20150020924A1
Автор: KASAI Daisuke, Obayashi Koji, Ogiso Takaaki, Sato Tsutomu, Taguchi Keita
Принадлежит:

A manufacturing method for a composite steel part including manufacturing a first steel part by preparing an intermediate product in which an extra portion is added, and heating the intermediate product to an austenitizing temperature in a carburizing atmosphere to form a carburized layer, cooling the intermediate product at a rate less than a cooling rate at which martensitic transformation is caused and in which the intermediate product is cooled to a temperature equal to or less than a temperature at which structure transformation due to the cooling is completed, heating the intermediate product to an austenitizing range by high-density energy and thereafter cooled at a rate equal to or more than the cooling rate at which martensitic transformation is caused to form a carburized quenched portion, cutting the extra portion of the intermediate product, and welding the first steel part and the second steel part to each other. 1. A manufacturing method for a composite steel part formed by welding a plurality of steel parts to each other , comprising: preparing an intermediate product in which an extra portion, which has a thickness equal to or more than that of a carburized layer to be formed in a subsequent carburizing step, has been added to the welding expected portion, and', the carburizing step in which the intermediate product is heated to an austenitizing temperature or more in a carburizing atmosphere to form the carburized layer on a surface of the intermediate product,', 'a cooling step, subsequent to the carburizing step, in which the intermediate product is cooled at a cooling rate less than a cooling rate at which martensitic transformation is caused and in which the intermediate product is cooled to a temperature equal to or less than a temperature at which structure transformation due to the cooling is completed,', 'a quenching step in which a desired portion of the intermediate product is heated to an austenitizing range by high-frequency heating and ...

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Номер записи: 73
22-01-2015 дата публикации

METHOD OF REMANUFACTURING A ROCKER ARM

Номер: US20150020932A1
Автор: Eggemeyer Jonathan R., LUICK KEGAN, Young Taylor
Принадлежит: CATERPILLAR INC.

A method of remanufacturing a rocker arm is provided. The rocker arm includes a body defining a center hole for receipt of a shaft, a first arm extending radially away from the center hole, and a second arm extending radially away from the center hole in a direction opposite the first arm. The second arm is configured to be operatively engaged with a valve mechanism and includes a contact surface configured to engage with a braking member. The contact surface includes a worn upper hardened surface. The method includes machining the contact surface to a depth less than a predefined tolerance limit to remove the worn upper hardened surface and create a generally planar unhardened contact surface. The method further includes hardening the unhardened contact surface using a laser to create a repaired contact surface with a surface hardness of greater than at least Rockwell C 50. 1machining the contact surface to a depth less than a predefined tolerance limit to remove the worn upper hardened surface and create a generally planar unhardened contact surface; andhardening the unhardened contact surface using a laser to create a repaired contact surface with a surface hardness of greater than at least Rockwell C 50.) A method of remanufacturing a rocker arm, the rocker arm including a body defining a center hole for receipt of a shaft, a first arm extending radially away from the center hole for engaging a camshaft, and a second arm extending radially away from the center hole in a direction opposite the first arm, the second arm configured to be operatively engaged with a valve mechanism and having a contact surface configured to engage with a braking member, the contact surface having a worn upper hardened surface, the method comprising: The present disclosure relates to a method of remanufacturing a rocker arm.Rocker arms are typically used in an engine to actuate various valve train components, such as intake and exhaust valves. During normal operation of the engine, ...

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Номер записи: 74
22-01-2015 дата публикации

NON-SCALING HEAT-TREATABLE STEEL AND METHOD FOR PRODUCING A NON-SCALING COMPONENT FROM SAID STEEL

Номер: US20150020992A1
Автор: Luther Friedrich, Mütze Stefan, Schöttler Joachim
Принадлежит:

A non-scaling heat-treatable steel with particular suitability for producing hardened or die-hardened components is disclosed, characterized by the following chemical composition in % by weight: C 0.04-0.50; Mn 0.5-6.0; Al 0.5-3.0; Si 0.05-3.0; Cr 0.05-3.0; Ni less than 3.0; Cu less than 3.0; Ti 0.010-≦0.050; B 0.0015-≦0.0040; P less than 0.10; S less than 0.05; N less than 0.020; remainder iron and unavoidable impurities. Further disclosed is a method for producing a non-scaling hardened component from the steel and a method for producing a hot strip from a steel. 129.-. (canceled)30. A non-scaling heat treatable steel , particularly suited for producing hardened or die hardened components , having the following chemical composition in weight %:C: 0.04-0.50Mn: 0.5-6.0Al: 0.5-3.0Si: 0.05-3.0Cr: 0.05-3.0Ni: less than 3.0Cu: less than 3.0Ti: 0.010-≦0.050B: 0.0015-≦0.0040P: less than 0.10S: less than 0.05N: less than 0.020remainder iron and unavoidable impurities.31. The non-scaling heat treatable steel of claim 30 , wherein Al+Si+Cr≧1 weight %.32. The non-scaling heat treatable steel of claim 31 , wherein Al+Si+Cr≧2 weight %.33. The non-scaling heat treatable steel of claim 32 , wherein Al+Si+Cr≧3 weight %.34. The non-scaling heat treatable steel of claim 30 , wherein Mn+Ni+Cu≧1 weight %.35. The non-scaling heat treatable steel of claim 34 , wherein Mn+Ni+Cu≧2 weight %.36. The non-scaling heat treatable steel of claim 35 , wherein Mn+Ni+Cu≧3 weight %.37. A method for producing a non-scaling claim 30 , hardened component from the steel of claim 30 , comprising:{'sub': 2', '2, 'heating a pre-product in a nitrogen containing atmosphere to austenizing temperature, said nitrogen containing atmosphere optionally containing H, CO and CO; and'}quenching the pre-product.38. The method of claim 37 , further comprising forming the pre-product into a component.39. The method of claim 37 , wherein the atmosphere has a dew point of below 0° C.40. The method of claim 37 , wherein ...

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Номер записи: 75
26-01-2017 дата публикации

STEEL FOR VEHICLE SUSPENSION SPRING PART, VEHICLE SUSPENSION SPRING PART, AND METHOD OF FABRICATING THE SAME

Номер: US20170021691A1
Автор: FUKUOKA Kazuaki, Goto Yurika, HATTORI Kazuaki, KIKUCHI Katsuhiko, Kurimoto Kiyoshi, TANGE Akira, Tomita Kunikazu
Принадлежит:

A steel, having a high corrosion resistance and low-temperature toughness, for a vehicle suspension spring part, the steel includes 0.21 to 0.35% by mass of C, more than 0.6% by mass but 1.5% by mass or less of Si, 1 to 3% by mass of Mn, 0.3 to 0.8% by mass of Cr, 0.005 to 0.080% by mass of sol. Al, 0.005 to 0.060% by mass of Ti, 0.005 to 0.060% by mass of Nb, not more than 150 ppm of N, not more than 0.035% by mass of P, not more than 0.035% by mass of S, 0.01 to 1.00% by mass of Cu, and 0.01 to 1.00% by mass of Ni, the balance being Fe and unavoidable impurities, with Ti+Nb≦0.07% by mass, wherein crystal grains of the steel after hardening have a prior austenite grain size number of 7.5 to 10.5, and the steel having a tensile strength of not less than 1,300 MPa. 1. A steel , having a high corrosion resistance and low-temperature toughness , for a vehicle suspension spring part , the steel comprising 0.21 to 0.35% by mass of C , more than 0.6% by mass but 1.5% by mass or less of Si , 1 to 3% by mass of Mn , 0.3 to 0.8% by mass of Cr , 0.005 to 0.080% by mass of sol. Al , 0.005 to 0.060% by mass of Ti , 0.005 to 0.060% by mass of Nb , not more than 150 ppm of N , not more than 0.035% by mass of P , not more than 0.035% by mass of S , 0.01 to 1.00% by mass of Cu , and 0.01 to 1.00% by mass of Ni , the balance being Fe and unavoidable impurities , with Ti+Nb≦0.07% by mass , wherein crystal grains of the steel after hardening have a prior austenite grain size number of 7.5 to 10.5 , and the steel having a tensile strength of not less than 1 ,300 MPa.2. The steel according to claim 1 , further comprising not more than 1% of Mo claim 1 , not more than 1% of V claim 1 , not more than 0.010% of B claim 1 , not more than 0.010% of Ca claim 1 , and not more than 0.5% of Pb.3. A method of fabricating a vehicle suspension spring part comprising:(a) hot-forming or cold-forming a steel into a shape of a spring part, the steel comprising 0.21 to 0.35% by mass of C, more than 0.6% ...

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Номер записи: 76
28-01-2016 дата публикации

Method for Producing a Profile and a Manufacturing System for Producing a Profile

Номер: US20160024605A1
Автор: Gorschlüter Jorg, Sikora Sascha
Принадлежит:

A method for producing a profile includes method steps of: providing a workpiece; shaping the workpiece; joining the workpiece; coating the workpiece; heating the workpiece; and at least partially hardening the workpiece; wherein the coating method step is carried out temporally after the joining method step and temporally before the heating method step. 1. A method for producing a profile , comprising the following method steps:providing a workpiece,shaping the workpiece,joining the workpiece,coating the workpiece,heating the workpiece,at least partially hardening the workpiece,wherein the coating method step is carried out temporally after the joining method step and temporally before the heating method step.2. The method according to claim 1 , wherein claim 1 , in the joining method step claim 1 , the shaped workpiece is welded.3. The method according to claim 1 , wherein claim 1 , in the shaping method step claim 1 , a slit is formed in the shaped workpiece by deformation.4. The method according to claim 1 , wherein the coated workpiece is hardened in a shaping manner in a hardening tool.5. The method according to claim 1 , wherein claim 1 , in the coating method step claim 1 , the joined workpiece is coated with a hot-dip coating process.6. The method according to claim 1 , wherein claim 1 , in the coating method step claim 1 , the joined workpiece is coated with an electrolytic coating process.7. The method according to claim 1 , wherein claim 1 , in the coating method step claim 1 , the joined workpiece is coated with an anti-scale layer in a painting process.8. The method according to claim 1 , further comprising cleaning the workpiece before the coating method step.9. The method according to claim 1 , wherein claim 1 , in the heating method step claim 1 , the coated workpiece is heated to a hardening temperature.10. The method according to claim 1 , wherein claim 1 , in the hardening method step claim 1 , the coated workpiece is transferred into a hardening ...

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Номер записи: 77
28-01-2016 дата публикации

PROCESS FOR PRODUCING A COMPONENT MADE OF HEAT-TREATED CAST IRON

Номер: US20160024622A1
Автор: BRODA Maik, PALAZZOLO Christopher K., URSAVAS Uemit, WARKENTIN Matthias, WEBER Glen
Принадлежит:

The disclosure relates to a process for producing a hardened and tempered component made of specially heat-treated cast iron (e.g., AGI). According to the disclosure, a main body made of cast iron is prepared which may already be in the shape of an engine block. The main body may then be subjected to pre-machining, which may include forming one or more bores. Then, the main body may be hardened and tempered by a suitable heat treatment, such as a special heat treatment. After the disclosed heat treatment, post-processing of the component may follow, such as establishing the final dimensions. 1. A process for producing a component made of heat-treated cast iron , comprising:casting a main body from a cast iron;pre-machining the main body, wherein the pre-machining comprises honing, at least in certain regions, and creating at least one bore;special heat treatment of the pre-machined main body, wherein the special heat treatment establishes an ausferritic microstructure; andfinishing the main body to its final dimensions.2. The process of claim 1 , wherein the pre-machined main body claim 1 , in the context of its special heat treatment claim 1 , is heated to a temperature of 850° C. to 950° C.3. The process of claim 1 , wherein the pre-machined main body is cooled in a salt bath after the special heat treatment.4. The process of claim 3 , wherein the salt bath has a temperature of 220° C. to 450° C.5. The process of claim 1 , wherein the main body is an engine block.6. The process of claim 1 , wherein the pre-machining takes into account a change in a shape of the main body as a consequence of its subsequent special heat treatment.7. The process of claim 1 , wherein at least one opening of the main body claim 1 , which is already hardened and tempered by the special heat treatment claim 1 , is then at least partially provided with a thread by a mechanical process.8. The process of claim 1 , wherein the special heat treatment establishes an at least 90% ausferritic ...

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Номер записи: 78
25-01-2018 дата публикации

Lightweight door beam, composition thereof and method of manufacturing the same

Номер: US20180023156A1
Автор: Alex Khutorsky, Jonghyun Kim
Принадлежит: Hyundai America Technical Center Inc, Hyundai Motor Co, Kia Motors Corp

A steel composition, a reinforcement part of a vehicle using the steel composition and a method of manufacturing the reinforcement part using the steel composition are provided. In particular, the steel composition includes increased content of carbon components and the steel composition is processed by rapid heating and immediate quenching.

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Номер записи: 79
24-01-2019 дата публикации

LOCALIZED TEMPERING OF CARBURIZED STEEL

Номер: US20190022798A1
Автор: Bojanowski Paul John, Hayden Tony
Принадлежит: Ford Motor Company

A method for joining a carburized steel workpiece to a cast iron workpiece is provided that includes tempering a localized area of the carburized steel workpiece, machining the localized area to reduce carbon content, and welding the carburized steel workpiece to the cast iron workpiece at the localized area. The tempering may be performed by induction heating and results in a hardness profile of the localized area of less than 50 HRC. 1. A method of joining a carburized steel workpiece to a cast iron workpiece comprising:tempering a localized area of the carburized steel workpiece;machining the localized area to reduce carbon content; andwelding the carburized steel workpiece to the cast iron workpiece at the localized area.2. The method according to claim 1 , wherein the tempering results in a hardness profile of the localized area of less than 50 HRC.3. The method according to claim 1 , wherein the machining is performed using carbide tooling.4. The method according to claim 1 , wherein the carbon content is reduced below about 0.25% by weight.5. The method according to claim 1 , wherein the tempering is performed by induction heating.6. The method according to claim 5 , wherein the induction heating comprises heating coils configured to match a profile of the localized area.7. The method according to claim 1 , wherein the tempering is between about 600° F. and about 1 claim 1 ,200° F.8. The method according to claim 1 , wherein the carburized steel workpiece is a hypoid or spiral bevel ring gear and the cast iron workpiece is a differential case.9. The method according to claim 1 , wherein the carbon content is reduced without a carbon blocking paste or an alloy cap.10. The method according to claim 1 , wherein the welding is laser welding.11. A method of preparing a carburized steel workpiece for subsequent welding comprising tempering a localized area of the carburized steel workpiece to reduce its HRC such that the localized area can be machined with carbide ...

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Номер записи: 80
10-02-2022 дата публикации

STUD-WELDABLE REBAR

Номер: US20220042127A1
Автор: Ray Samuel T., WHITE Timothy A., Workman Peter A.
Принадлежит: TFP Corporation

A stud-weldable rebar and a method for making the rebar are disclosed. The rebar has a steel body with a weld end and a diameter that is substantially uniform along a length of the body. A tip portion at the weld end includes a hardened zone and a base portion is formed of the remaining steel body. The hardened zone has a hardness that is about 1.5-3.0 times greater than a hardness of the base portion. Induction hardening is used to form the hardened zone. 112-. (canceled)13. A method of forming a stud-weldable rebar comprising:providing a steel body with a weld end and a diameter that is substantially uniform along a length of the body;heating a portion of the weld end for about 4-9 seconds until the portion of the weld end reaches a target temperature of about 1,300-1,700° F.;allowing the heated portion of the weld end to rest for a dwell time of about 2 seconds; and,cooling the heated portion of the weld end by quenching in a cooling medium for about 5-12 seconds,wherein a hardness of the weld end portion is increased by about 1.5-3 times a hardness of a remaining portion of the steel body.14. The method of claim 13 , wherein the hardness of the hardened weld end portion is about 20-50 HRC.15. The method of claim 13 , wherein the length of the hardened weld end portion is about 40% the diameter of the steel body.16. The method of claim 13 , further comprising providing a steel body having a chemical composition of 0.08-0.23 wt % of carbon claim 13 , 0.95-1.2 wt % of manganese claim 13 , less than 0.04 wt % of phosphorous claim 13 , less than 0.05 wt % of sulfur claim 13 , 0.2-0.4 wt % of silicon claim 13 , less than 0.25 wt % of copper claim 13 , less than 0.15 wt % of nickel claim 13 , less than 0.15 wt % of chromium claim 13 , 0.001-0.05 wt % of molybdenum claim 13 , 0.001-0.02 wt % of aluminum claim 13 , 0.03-0.08 wt % vanadium claim 13 , less than 0.0005 wt % of boron claim 13 , and less than 0.02 wt % of nitrogen.17. The method of claim 13 , further ...

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Номер записи: 81
10-02-2022 дата публикации

Structural steel having excellent brittle fracture resistance and method for manufacturing same

Номер: US20220042146A1
Автор: Il-Cheol YI, Jae-Young CHO, Sang-Deok Kang
Принадлежит: Posco Co Ltd

A structural steel having excellent brittle fracture resistance according to an aspect of the present invention comprises, by weight %, 0.02-0.12% of C, 0.01-0.8% of Si, 1.5-2.5% of Mn, 0.005-0.5% of Al, 0.02% or less of P, 0.01% or less of S, 0.0015-0.015% of N, and the remainder of Fe and unavoidable impurities, wherein an outer surface layer portion and an inner central portion are microstructurally divided along the thickness direction, the surface layer portion comprises tempered bainite as a matrix structure, the central portion comprises bainitic ferrite as a matrix structure, and the NDT temperature by the NRL drop-weight test may be −70° C. or lower.

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Номер записи: 82
10-02-2022 дата публикации

Abrasion resistant steel having excellent hardness and impact toughness and manufacturing method therefor

Номер: US20220042152A1
Автор: Nam-Young Cho, Seng-Ho YU, Young-jin JUNG
Принадлежит: Posco Co Ltd

One embodiment of the present disclosure provides an abrasion resistant steel having excellent hardness and impact toughness, and a manufacturing method therefor, the steel comprising, by wt %, 0.33-0.42% of C, 0.1-0.7% of Si, 0.6-1.6% of Mn, 0.05% or less of P, 0.02% or less of S, 0.07% or less of Al, 0.55-5.0% of Ni, 0.01-1.5% of Cu, 0.01-0.8% of Cr, 0.01-0.8% of Mo, 50 ppm or less of B, and 0.02% or less of Co, further comprising one or more selected from the group consisting of 0.02% or less of Ti, 0.05% or less of Nb, 0.05% or less of V and 2-100 ppm of Ca, and comprising the balance of Fe and other inevitable impurities, wherein C and Ni satisfy the following relation 1, and the microstructure comprises 95 area % or more of martensite and 5% or less of bainite (including 0%). [Relation 1] [C]×[Ni]≥0.231

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Номер записи: 83
23-01-2020 дата публикации

METHOD FOR PRODUCING A STRIP STEEL KNIFE, AND STRIP STEEL KNIFE FOR TOOLS

Номер: US20200023420A1
Автор: Haas Anton, Kastner Andreas
Принадлежит: VOESTALPINE PRECISION STRIP GMBH

Method and strip steel knife from a steel strip having a bainite and decarburized surface. The steel strip has a generally rectangular cross-section, and the method includes machining a plurality of beveled surfaces in a region of a longitudinal edge of the steel strip to create at least a cutting surface defining a longitudinal cutting edge; first hardening at least a part of the cutting surface to form a first cutting edge region of the longitudinal cutting edge; smoothing the cutting surface of at least the first cutting edge region toward the longitudinal cutting edge; and at least one further hardening in the first cutting edge region to form a distal cutting edge region of the longitudinal cutting edge within the first cutting edge region having an increased material hardness with respect to the first cutting edge region located outside the distal cutting edge region. 1. A method for producing a strip steel knife with a hardened cutting edge from a steel strip comprising bainite and having a decarburized surface , the steel strip having a generally rectangular cross-section the method comprising:machining a plurality of beveled surfaces in a region of a longitudinal edge of the steel strip to create at least a cutting surface defining a longitudinal cutting edge;first hardening at least a part of the cutting surface to form a first cutting edge region of the longitudinal cutting edge;smoothing the cutting surface of at least the first cutting edge region toward the longitudinal cutting edge; andat least one further hardening in the first cutting edge region to form a distal cutting edge region of the longitudinal cutting edge within the first cutting edge region having an increased material hardness with respect to the first cutting edge region located outside the distal cutting edge region.2. The method according to claim 1 , wherein the machining of the plurality of beveled surfaces comprises shaving claim 1 , andwherein the first hardening comprises ...

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Номер записи: 84
24-01-2019 дата публикации

Precipitation Hardening High Entropy Alloy and Method of Manufacturing the Same

Номер: US20190024198A1
Автор: Hong Sun Ig, Song Jae Sook
Принадлежит:

High-entropy alloy, particularly a precipitation hardening high entropy alloy, is provided as a component material used in electromagnetic, chemical, shipbuilding, mechanical, and other applications, a component material used in extreme environments requiring high strength and good corrosion resistance, and the like. 1. Precipitation hardening high-entropy alloy , the high-entropy alloy comprising:four or more elements selected from the group consisting of more than 5 wt % to 35 wt % or less of iron (Fe), more than 5 wt % to 35 wt % or less of chromium (Cr), more than 5 wt % to 35 wt % or less of nickel (Ni), more than 5 wt % to 35 wt % or less of manganese (Mn), more than 5 wt % to 35 wt % or less of cobalt (Co), more than 5 wt % to 35 wt % or less of copper (Cu);one or more elements of 1) and 2):1) one or more of 0.01 wt % to 1.5 wt % of C, 0.01 wt % to 1.5 wt % of N, and 0.01 at % to 1.5 wt % of B,2) one or more of 0.01 wt % to 5 wt % of Ti, 0.01 wt % to 3 wt % of Zr, 0.01 wt % to 5 wt % of Hf, 0.01 wt % to 5 wt % of Mo, 0.01 wt % to 5 wt % of W, 0.01 wt % to 5 wt % of Nb, 0.01 wt % to 5 wt % of V, 0.01 wt % to 5 wt % of Ta, 0.01 wt % to 5 wt % of Ag, 0.01 wt % to 5 wt % of Si, 0.01 wt % to 5 wt % of Cu, and 0.01 wt % to 5 wt % of Ge, and inevitable residual impurities;wherein the high-entropy alloy is provided with a matrix in which precipitates are dispersed.2. The precipitation hardening high-entropy alloy of claim 1 , wherein the precipitate is one or more of 1) and 2):{'sub': x', 'x', 'x, '1) one or more of carbides (MC), nitrides (MN), carbonitrides (MC,N), and borides (MBx); and'}2) one or more of precipitates that include one or more of Ti, Zr, Hf, Mo, W, Nb, V, Ta, Ag, Si, Cu, or Ge, and intermetallic compounds thereof.3. The precipitation hardening high-entropy alloy of claim 1 , wherein the precipitate has the diameter of 0.5 nm to 50 nm claim 1 , and the spacing between dispersed precipitates is 1 nm to 500 nm.4. A method of manufacturing a ...

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Номер записи: 85
24-01-2019 дата публикации

HEAT TREATMENT METHOD AND HEAT TREATMENT DEVICE

Номер: US20190024199A1
Автор: REINARTZ Andreas, WILDEN Frank, WINKEL Jörg
Принадлежит:

In one or more first regions of a steel component, a primarily austenitic microstructure can be produced from which a mainly martensitic microstructure can be brought about through a quenching process. In one or more second regions of the component, a mainly ferritic-pearlitic microstructure can be brought about. In one or more third regions, a mainly bainitic microstructure can be brought about. The component is first heated to a temperature below the AC3 temperature in a first furnace, and transferred into a treatment station. The component can be cooled during the transfer. In the treatment station, the first and third regions are brought to a temperature above the austenitization temperature. Only the third regions are cooled to a cooling stop temperature ϑs. The component is transferred into a second furnace, with a temperature lying below the AC3 temperature. There, the temperatures of the three different regions approximate one another. 1. A method for targetedly heat-treating individual zones of a steel component , comprising: forming a primarily austenitic structure in one or more first regions of the steel component , from which austenitic structure a predominantly martensitic structure is produced by means of quenching , forming a predominantly ferritic-pearlitic structure in one or more second regions , forming a primarily bainitic structure in one or more third regions of the steel component , heating the steel component first being heated in a first furnace to a temperature that is below the AC3 temperature , transferring the steel component to a treatment station , cooling down said component whilst being transferred , heating the one or more first regions and the one or more third regions of the steel component in the treatment station to a temperature that is above the AC3 temperature within a dwell time t , cooling the third region or third regions of the steel component to the cooling stop temperature ϑ , and transferring the steel component to a ...

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Номер записи: 86
24-01-2019 дата публикации

METHOD FOR HEAT TREATMENT OF A METAL COMPONENT

Номер: US20190024203A1
Автор: REINARTZ Andreas, WILDEN Frank, WINKEL Jörg
Принадлежит:

The invention relates to a method for heat treating a metal component. The invention relates in particular to an application in the partial hardening of optionally pre-coated components made of high-strength manganese-boron steel. With the method, at least one first sub-region of the component is convectively cooled by means of at least one nozzle, which discharges a fluid stream to the first sub-region so that a temperature difference of at least 100 K is set between the at least one first sub-region and at least one second sub-region of the component, wherein the at least one nozzle is operated with a positive pressure of at least 2 bar. 1. A method for heat treating a metal component , wherein the method comprising: convectively cooling at least one first sub-region of the component by means of at least one nozzle discharging a fluid stream toward the first sub-region , so that a temperature difference of at least 100 K is set between the at least one first sub-region and at least one second sub-region of the component , the at least one nozzle being operated at a positive pressure of at least 2 bar.2. The method according to claim 1 , further comprising claim 1 , prior to cooling claim 1 , heating at least the at least one first sub-region of the component by at least 500 K.3. The method according to claim 1 , further comprising claim 1 , after cooling claim 1 , heating at least the at least one first sub-region of the component by at least 100 K.4. A method for heat treating a metal component claim 1 , comprising at least the following steps:a) heating the component in a first furnace;b) moving the component into a temperature control station;c) convectively cooling at least one first sub-region of the component in the temperature control station by means of at least one nozzle discharging a fluid stream toward the first sub-region, wherein a temperature difference is set between the at least one first sub-region and at least one second sub-region of the ...

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Номер записи: 87
24-01-2019 дата публикации

Dual hardness steel article

Номер: US20190024204A1
Автор: Glenn J. Swiatek, Njall Stefansson, Ronald E. Bailey
Принадлежит: ATI Properties LLC

A dual hardness steel article comprises a first air hardenable steel alloy having a first hardness metallurgically bonded to a second air hardenable steel alloy having a second hardness. A method of manufacturing a dual hard steel article comprises providing a first air hardenable steel alloy part comprising a first mating surface and having a first part hardness, and providing a second air hardenable steel alloy part comprising a second mating surface and having a second part hardness. The first air hardenable steel alloy part is metallurgically secured to the second air hardenable steel alloy part to form a metallurgically secured assembly, and the metallurgically secured assembly is hot rolled to provide a metallurgical bond between the first mating surface and the second mating surface.

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Номер записи: 88
28-01-2016 дата публикации

PRIMARY ULTRAFINE-CRYSTALLINE ALLOY, NANO-CRYSTALLINE, SOFT MAGNETIC ALLOY AND ITS PRODUCTION METHOD, AND MAGNETIC DEVICE FORMED BY NANO-CRYSTALLINE, SOFT MAGNETIC ALLOY

Номер: US20160027566A1
Автор: Mihara Toshio, Miyamoto Taku, Ohta Motoki, Yoshizawa Yoshihito
Принадлежит: HITACHI METALS, LTD.

A primary ultrafine-crystalline alloy having a composition represented by the general formula: FeABX, wherein A is Cu and/or Au, X is at least one element selected from the group consisting of Si, S, C, P, Al, Ge, Ga and Be, and x, y and z are numbers (by atomic %) meeting the conditions of 0 Подробнее

Номер записи: 89
29-01-2015 дата публикации

RAIL COOLING METHOD AND RAIL COOLING DEVICE

Номер: US20150027599A1
Автор: Horita Tomoo, Kataoka Yuzuru, Kimura Tatsumi, Kojo Rinya, Matsuoka Ryo, Nakaseko Makoto, Takahashi Hideki, Takemasa Mineyasu, Yoshida Yoshikazu
Принадлежит:

A rail cooling method for forcibly cooling a rail by jetting a coolant includes jetting the coolant to a foot back part of the rail from a porous plate nozzle in which a nozzle hole at an end in a width direction is smaller than a nozzle hole at a central part in the width direction and causes a cooling capacity for the end in the width direction of the underside of the base of the rail to be lower than a cooling capacity for the central part in the width direction of the underside of the base of the rail. 1. A rail cooling method for forcibly cooling a rail by jetting a coolant , the rail cooling method comprising:jetting the coolant to an underside of the base of the rail from a porous plate nozzle in which a nozzle hole at an end in a width direction is smaller than a nozzle hole at a central part in the width direction and causes a cooling capacity for the end in the width direction of the underside of the base of the rail to be lower than a cooling capacity for the central part in the width direction of the underside of the base of the rail.2. The rail cooling method according to claim 1 , wherein the nozzle holes have a circular shape claim 1 , and a diameter of the nozzle hole at the end is 20% to 90% of a diameter of the nozzle hole at the central part.3. A rail cooling device configured to forcibly cool a rail by jetting a coolant claim 1 , the rail cooling device comprising:a porous plate nozzle including a plurality of nozzle holes configured to jet the coolant that are opposed to an underside of the base of the rail to cool the underside of the base of the rail, whereinthe nozzle hole at an end in a width direction is formed to be smaller than a nozzle hole at a central part to cause a cooling capacity for the end in the width direction of the underside of the base of the rail to be lower than a cooling capacity for the central part in the width direction of the underside of the base of the rail.4. The rail cooling device according to claim 3 , wherein ...

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Номер записи: 90
29-01-2015 дата публикации

COOLING ELEMENT WITH SPACER

Номер: US20150027601A1
Автор: Hägele Tobias, Hartmann Dieter, KELSCH Reiner, Sommer Andreas
Принадлежит:

A method for producing partially hardened steel components in which a blank composed of a hardenable sheet steel is subjected to a temperature increase and shaped into a component; the component is transferred to a tool in which the heated component is cooled and thus quench hardened; during the heating of the blank or component in order to achieve the temperature increase to a temperature required for the hardening in regions that are to have a lower hardness and/or higher ductility, cooling elements are spaced apart from the surface by a small gap; the cooling element is dimensioned so that the thermal energy acting on the region that remains ductile flows through the component into the cooling element, characterized in that in order to space the cooling element apart from the component, micro-nubs or knobs are used, which are distributed over the area of the cooling element. 1. A method for producing partially hardened steel components , comprising:subjecting a blank composed of a hardenable sheet steel to a temperature increase that is sufficient for a quench hardening and, after reaching a desired temperature and possibly after a desired sojourn time, transferring the blank to a forming tool wherein the blank is shaped into a component and simultaneously quench hardened, or cold forming the blank and then subjecting the component obtained from the cold forming to a temperature increase that is carried out so that a component temperature that is required for a quench hardening is reached and then transferring the component to a tool in which the heated component is cooled and thus quench hardened;during the heating of the blank or component in order to achieve the temperature increase to a temperature required for the hardening, in regions that are to have a lower hardness and/or higher ductility, spacing apart one or more cooling elements from a surface of the blank or component by a small gap; wherein the cooling element or cooling elements are dimensioned ...

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Номер записи: 91
23-01-2020 дата публикации

Hot rolled steel sheet, steel forged part and production method therefor

Номер: US20200024679A1
Автор: Kazuya Ootsuka, Nobuo Yoshikawa, Shigeru Yonemura, Tatsuo Yokoi
Принадлежит: Nippon Steel Corp

A hot rolled steel sheet having a chemical composition consisting of, in mass %, C: 0.020-0.070%, Si: 0.05-1.70%, Mn: 0.60-2.50%, Al: 0.005-0.020%, N: >0.0030-0.0060%, P≤0.050%, S≤0.005%, Ti: 0.015-0.170%, Nb: 0-0.100%, V: 0-0.300%, Cu: 0-2.00%, Ni: 0-2.00%, Cr: 0-2.00%, Mo: 0-1.00%, B: 0-0.0100%, Ca: 0-0.0100%, Mg: 0-0.0100%, REM: 0-0.1000%, Zr: 0-1.000%, Co: 0-1.000%, Zn: 0-1.000%, W: 0-1.000%, Sn: 0-0.050%, the balance: Fe and impurities, wherein Ca+Mg+REM≥0.0005, a metal microstructure includes, in area %, ferrite: 5-70%, bainite: 30-95%, retained γ≤2%, martensite ≤2%, pearlite ≤1%, ferrite+bainite≥95%, a number density of the precipitates in ferrite grains is 1.0×10 16 -50.0×10 16 /cm 3 , an average circle-equivalent diameter of the TiN precipitates in the steel sheet is 1.0-10.0 μm, an average of minimum distances between adjacent TiN precipitates is 10.0 μm or more, and a standard deviation of nano hardness is 1.00 GPa or less.

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Номер записи: 92
23-01-2020 дата публикации

THIN GAUGE WEAR-RESISTANT STEEL SHEET AND METHOD OF MANUFACTURING THE SAME

Номер: US20200024707A1
Автор: DAI Jietao, GAO Jixiang, LI Liejun, LU Yanjun, PENG Zhengwu, Sun Haibo, Zhou Feng
Принадлежит:

A thin gauge wear-resistant steel sheet, including the following chemical elements expressed in percentage by weight: 0.15-0.20 wt. % of carbon; 1.2-1.8 wt. % of manganese; 0.1-0.40 wt. % of copper; 0.15-0.30 wt. % of molybdenum; 0.20-0.40 wt. % of chromium; 0.03-0.06 wt. % of niobium; 0.01-0.03 wt. % of titanium; 0.0006-0.0015 wt. % boron; less than 0.015 wt. % of phosphorus; less than 0.010 wt. % of sulphur; and the balance being ferrum and unavoidable impurities, wherein the thickness of the steel sheet is in a range of 3.0 to 8 mm. 1. A thin gauge wear-resistant steel sheet , comprising the following chemical elements in percentage by weight: 0.15-0.20 wt. % of carbon; 1.2-1.8 wt. % of manganese; 0.1-0.40 wt. % of copper; 0.15-0.30 wt. % of molybdenum; 0.20-0.40 wt. % of chromium; 0.03-0.06 wt. % of niobium; 0.01-0.03 wt. % of titanium; 0.0006-0.0015 wt. % boron; less than 0.015 wt. % of phosphorus; less than 0.010 wt. % of sulphur; with a balance being ferrum and unavoidable impurities , wherein the thickness of the steel sheet is in a range of 3.0 to 8 mm.2. The thin gauge wear-resistant steel sheet of claim 1 , wherein a surface Brinell hardness of the steel sheet is greater than or equal to 370 HBW; and/or a tensile strength of the steel sheet is greater than or equal to 1200 MPa claim 1 , and a broken extension rate A50 of the steel sheet is greater than or equal to 10%.3. A method of manufacturing the thin gauge wear-resistant steel sheet according to claim 1 , comprising steps of:S1, performing hot metal desulfurization and converter smelting and controlling the content of sulphur in the hot metal to be not less than or equal to 0.0030%, and a thickness of a slag layer to be not less than or equal to 50 mm in the hot metal;S2, performing converter tapping, and performing deoxidation and alloying using a ferrosilicon or silicon manganese alloy;S3, performing deoxidation and alloying by RH furnace refining;S4, performing ladle furnace, adding an aluminum ...

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Номер записи: 93
28-01-2021 дата публикации

BEARING PART

Номер: US20210025452A1
Автор: Ohki Chikara, Yamada Masahiro
Принадлежит:

A bearing part is composed of a steel, and includes a quench-hardened layer in a surface of the bearing part. The quench-hardened layer includes a plurality of martensite crystal grains. A ratio of a total area of the plurality of martensite crystal grains in the quench-hardened layer is more than or equal to 70%. The plurality of martensite crystal grains are classified into a first group and a second group. A minimum value of crystal grain sizes of the martensite crystal grains belonging to the first group is larger than a maximum value of crystal grain sizes of the martensite crystal grains belonging to the second group. 1. A bearing part composed of a steel , the bearing part comprising a quench-hardened layer in a surface of the bearing part , whereinthe quench-hardened layer includes a plurality of martensite crystal grains,a ratio of a total area of the plurality of martensite crystal grains in the quench-hardened layer is more than or equal to 70%,the plurality of martensite crystal grains are classified into a first group and a second group,a minimum value of crystal grain sizes of the martensite crystal grains belonging to the first group is larger than a maximum value of crystal grain sizes of the martensite crystal grains belonging to the second group,a value obtained by dividing a total area of the martensite crystal grains belonging to the first group by the total area of the plurality of martensite crystal grains is more than or equal to 0.5,a value obtained by dividing, by the total area of the plurality of martensite crystal grains, a total area of the martensite crystal grains belonging to the first group except for a martensite crystal grain that has a minimum crystal grain size and that belongs to the first group is less than 0.5, andan average grain size of the martensite crystal grains belonging to the first group is less than or equal to 0.97 μm.2. The bearing part according to claim 1 , wherein an average aspect ratio of the martensite ...

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Номер записи: 94
24-01-2019 дата публикации

METHOD OF MANUFACTURING ELECTRICAL FEEDTHROUGH INCLUDING PROCESSES FOR REDUCING STRESS IN PACKAGES HAVING A HIGH-CTE METAL AND LOW-CTE SEALING MATERIAL INTERFACE

Номер: US20190027914A1
Автор: Sawyer Robert, Settles Nelson, Xia Hua
Принадлежит:

Methods for use in the manufacture or assembly of an electrical feedthrough to provide a solution to the technical and operational challenges that may arise from use of a high-CTE metal/low-CTE sealing material based assembly or package. In some embodiments, the inventive method includes a thermal tempering and thermal quenching process that is used to create an interfacial layer of the sealing material in which there exists a CTE gradient from sealing material to the metal shell and pin(s). This enables the production of an electrical feedthrough assembly that can tolerate high-CTE mismatch induced mechanical stress over a wide operating temperature range. 116.-. (canceled)17. An electrical feedthrough assembly , comprising:one or more conductive pins;a metal shell surrounding a region containing the one or more conductive pins; anda layer or layers of a sealing material, the layer or layers including a region or regions in which a value of the sealing material coefficient of thermal expansion (CTE) varies in an area around each of the one or more conducting pins and across at least a portion of an area between the one or more conducting pins and the metal shell.18. The electrical feedthrough assembly of claim 17 , wherein the area around each of the one or more conducting pins includes the interfaces between the conducting pins and sealing material claim 17 , and the area between the one or more conducting pins and the metal shell includes the interfaces between the sealing material and the metal shell.19. The electrical feedthrough assembly of claim 17 , wherein the sealing material's composition claim 17 , morphology claim 17 , or microstructure claim 17 , either alone or in combination claim 17 , varies in the area around each of the one or more conducting pins and across at least a portion of the area between the one or more conducting pins and the metal shell.20. The electrical feedthrough assembly of claim 19 , wherein the variation in the material's ...

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Номер записи: 95
04-02-2016 дата публикации

METAL SHAFT HAVING LONGITUDINALLY VARYING HARDNESS, GOLF SHAFT USING THE METAL SHAFT, GOLF CLUB USING THE METAL GOLF SHAFT, METHOD OF MANUFACTURING THE METAL SHAFT, AND TEMPERING APPARATUS

Номер: US20160030817A1
Автор: IWASE Masahito, ONO Hiroyuki
Принадлежит:

A metal shaft includes a hollow tube made of metal, capable of having hardness varying in a longitudinal direction of the metal shaft while preventing increase in the number of variations on a shape of the metal shaft. The tube has a hardness pattern exhibited by hardness of the tube varying in a longitudinal direction of the tube according to Young's modulus or tensile strength of the metal varying in the longitudinal direction. 1. A metal shaft comprisinga hollow tube made of metal,wherein the tube has a hardness pattern exhibited by hardness of the tube varying in a longitudinal direction of the tube according to Young's modulus or tensile strength of the metal varying in the longitudinal direction.2. A golf shaft comprising the metal shaft of claim 1 , a head-attaching portion to which a head is attached on a tip, and', 'a grip-attaching portion to which a grip is attached on a butt., 'wherein the tube of the metal shaft includes'}3. The golf shaft of claim 2 ,wherein the hardness of the tube exhibiting the hardness pattern curvedly and/or straightly decreases or increases from the tip to the butt.4. A golf club comprising the golf shaft of claim 2 , further comprising:a head attached to the head-attaching portion of the golf shaft; anda grip attached to the grip-attaching portion of the golf shaft.5. A method of manufacturing the metal shaft of claim 1 , comprising:quenching a tube made of metal; andtempering the quenched tube while varying a tempering condition in a longitudinal direction of the tube.6. The method of claim 5 ,wherein the tempering step heats the quenched tube at a setting temperature with a heating unit while longitudinally passing the quenched tube through the heating unit at a setting speed, the setting temperature and/or the setting speed varying as the tempering condition.7. The method of claim 6 ,wherein the heating unit is a heating coil to which a controlled high frequency current is applied,wherein the setting temperature is a ...

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Номер записи: 96
01-02-2018 дата публикации

STEEL SHEET FOR HOT PRESSING AND METHOD FOR PRODUCING SAME

Номер: US20180029102A1
Автор: Asai Tatsuya, MIZUTA Naoki, OMORI Hiroyuki
Принадлежит: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

A steel sheet for hot pressing which contains, in mass %, C: 0.15% or more to 0.40% or less, Si: 1.00% or more to 2.00% or less, Mn: 1.50% or more to 3.00% or less, Ti: (N×48/14)% or more to 0.10% or less, B: 0.0005% or more to 0.0050% or less, Al: more than 0% to 0.10% or less, P: more than 0% to 0.05% or less, S: more than 0% to 0.01% or less, N: more than 0% to 0.010% or less, iron and inevitable impurities. This steel sheet for hot pressing is also characterized by having a dislocation density of 10×10/mor more, an area ratio of pearlite relative to the whole structure being 30% or more, and a tensile strength of 1100 MPa or less. 1. A steel sheet , comprising , in mass %:C: 0.15% or more to 0.40% or less,Si: 1.00% or more to 2.00% or less,Mn: 1.50% or more to 3.00% or less,Ti: (N×48/14)% or more to 0.10% or less,B: 0.0005% or more to 0.0050% or less,Al: more than 0% to 0.10% or less,P: more than 0% to 0.05% or less,S: more than 0% to 0.01% or less,N: more than 0% to 0.010% or less, andFe,{'sup': 14', '2, 'and having a dislocation density of 10×10/mor more, an area ratio of pearlite relative to a whole structure of 30% or more, and a tensile strength of 1100 MPa or less.'}2. The steel sheet according to claim 1 , further comprising claim 1 , in mass % claim 1 , one or more of (i) to (iii):(i) at least one element selected from the group consisting of Mo and Cr in a sum of more than 0% to 0.50% or less,(ii) at least one element selected from the group consisting of Cu and Ni in a sum of more than 0% to 0.50% or less, and(iii) at least one element selected from the group consisting of Nb, V, and Zr in a sum of more than 0% to 0.10% or less.3. The steel sheet according to claim 1 , having a zinc-based plating layer or an aluminum-based plating layer on at least one surface of the steel sheet.4. The steel sheet according to claim 2 , having a zinc-based plating layer or an aluminum-based plating layer on at least one surface of the steel sheet.5. A method for ...

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Номер записи: 97
01-02-2018 дата публикации

METHOD OF TRACK LINK MANUFACTURE

Номер: US20180029653A1
Автор: Johannsen Eric James
Принадлежит: CATERPILLAR INC.

A method of fabricating a track link comprises creating a rail portion of a track link from a high alloy steel, creating a main body portion of a track link from a low alloy steel, and friction adhering the rail portion onto the main body portion. 1. A track link for use with a track chain of a vehicle that includes a plurality of track pins and bushings , the track link comprising:a main body portion that defines a plurality of apertures for receiving a track pin or bushing, the main body portion comprising a low alloy steel; anda rail portion that that comprises a high alloy steel.2. The track link of wherein the rail portion is attached to the main body portion using linear friction adhesion.3. The track link of wherein the hardness of the rail portion of the track link is RCW C50-55.4. The track link of wherein the hardness of the main body portion is RCW C33-37.5. The track link of wherein the rail portion defines a consistent rail thickness.6. The track link of wherein the minimum distance from the rail portion to any aperture of the main body portion is 4-8 mm.7. The track link of wherein the rail thickness ranges from 4 to 20 mm.8. A track chain assembly for use with a vehicle that includes an endless track drive claim 5 , the track chain comprising:a plurality of track pins and track bushings disposed about the track pins; anda plurality of track links that are connected to each other by either a track pin or a track bushing, wherein at least one track link comprises a main body portion that defines a plurality of apertures for receiving a track pin or bushing, the main body portion comprising a low alloy steel, and a rail portion that that comprises a high alloy steel.9. The track chain of wherein the rail portion is attached to the main body portion using linear friction adhesion.10. The track chain of wherein the hardness of the rail portion of the track link is RCW C50-55.11. The track chain of wherein the hardness of the main body portion is RCW C33-37 ...

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Номер записи: 98
02-02-2017 дата публикации

Workpiece for induction hardening

Номер: US20170029910A1
Автор: Yutaka Kiyosawa
Принадлежит: Neturen Co Ltd

A workpiece for an induction hardening is provided. The workpiece has a first inclined surface, a second inclined surface, and a connecting surface connecting the first inclined surface and the second inclined surface on a side toward which the first inclined surface and the second inclined surface approach each other. The connecting surface has a recessed portion. A hardened layer formed at the first inclined surface and another hardened layer formed at the second inclined surface do not overlap each other at the recessed portion.

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Номер записи: 99
02-02-2017 дата публикации

MARTENSITIC-FERRITIC STAINLESS STEEL, MANUFACTURED PRODUCT AND PROCESS USING THE S

Номер: US20170029912A1
Автор: DE CARVALHO Ricardo Nolasco, DE LIMA Marília Mendonça, FARINA Alexandre Bellegard, FERREIRA Marcelo Almeida Cunha, LIBERTO Rodrigo Cesar Nascimento, Mesquita Rafael Agnelli
Принадлежит:

The present invention relates to a martensitic-ferritic stainless steel with high corrosion resistance that comprises the following chemical composition: C: from 5 0.005 to 0.030%; Si: from 0.10 to 0.40%; Mn from 0.20 to 0.80%; P: 0.020% max; S: 0.005% max; Cr: from 13 to 15%; Ni: from 4.0 to 6.0%; Mo: from 2.0 to 4.5%; V: from 0.01 to 0.10%; Nb: from 0.01 to 0.50%; N: from 0.001 to 0.070%; Al: from 0.001 to 0.060%; Ti: from 0.001 to 0.050%; Cu: from 0.01 to 1.50%; O: 0.005% max (all in weight percent), wherein the balance is performed by Fe and unavoidable impurities 10 from the industrial possessing in acceptable levels. Additionally, the martensitic-ferritic stainless steel of the present invention has the localized corrosion parameter (LCP), between 3.2 and 6.2, as defined by equation below; LCP=0.500−% Cr+1.287·% Mo+1.308·% N−5.984 The present invention also relates to a manufactured product comprising the martensitic-ferritic stainless steel of the invention; to a process for 15 production of forged or rolled parts or bars; and to a process for production of seamless tube from this martensitic-ferritic stainless steel of the present invention, wherein the processes of the invention have a heating temperature in determined step following the equation below: T−16.9*% Cr−49.9*% Mo>535 117-. (canceled)18. MARTENSITIC-FERRITIC STAINLESS STEEL , wherein it comprises a martensitic-ferritic microstructure , and a chemical composition in the range of C: from 0.005 to 0.030%; Si: from 0.10 to 0.40%; Mn from 0.20 to 0.80%; P: 0.020% max; S: 0.005% max; Cr: from 13 to 15%; Ni: from 4.0 to 6.0%; Mo: from 2.0 to 4.5%; V: from 0.01 to 0.10%; Nb: from 0.01 to 0.50%; N: from 0.001 to 0.070%; Al: from 0.001 to 0.060%; Ti: from 0.001 to 0.050%; Cu: from 0.01 to 1.50%; O: 0.005% max (in weight percent) , wherein the balance is performed by Fe and unavoidable impurities from the industrial possessing in acceptable levels and having the localized corrosion parameter (LCP) between 3 ...

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Номер записи: 100