Настройки

Укажите год
-

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

Подробнее
-

Мониторинг СМИ

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

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 40582. Отображено 100.
05-01-2012 дата публикации

Steel Alloy

Номер: US20120000336A1
Автор: Andreas Schremb
Принадлежит: Gebr Schmachtenberg GmbH

An alloy, such as a tool steel containing, in percent by weight, 0.5%-0.7% carbon; 1.80%-2.50% chromium; 0.90%-1.20% molybdenum; 3.50%-5.50% nickel and 0.60%-1.50% vanadium. The steel alloyed accordingly is eminently suitable for heat treatments for influencing strength. With a carbon content of less than 0.7%, a partially martensitic metal structure having a high ductility can be formed by way of hardening processes. Due to surface hardening, the carbon content may in some portions on the outer surface be greater than 0.7%.

Подробнее
Номер записи: 1
05-01-2012 дата публикации

Method of Making Ultra-High Strength Stainless Steels

Номер: US20120000579A1
Автор: Warren M. Garrison, Jr.
Принадлежит: CARNEGIE MELLON UNIVERSITY

An ultra-high strength stainless steel alloy with enhanced toughness includes in % by weight: 0 to 0.06% carbon (C); 12.0 to 18% chromium (Cr); 16.5 to 31.0% cobalt (Co); 0 to 8% molybdenum (Mo); 0.5 to 5.0% nickel (Ni); 0 to 0.5% titanium (Ti); 0 to 1.0% niobium (Nb); 0 to 0.5% vanadium (V); 0 to 16% tungsten (W); balance iron (Fe) and incidental deoxidizers and impurities. The heat treating method includes the steps of austenitizing at least once followed by quenching, tempering and sub-zero cooling to obtain no more than about 6-8% retained austenite in the finished alloy.

Подробнее
Номер записи: 2
12-01-2012 дата публикации

Method and apparatus for hot forming and hardening a blank

Номер: US20120006089A1
Автор: Markus Pellmann, Martin Pohl, Otto Buschsieweke, Stefan Adelbert
Принадлежит: Benteler Automobiltechnik GmbH

A blank cut from a strip of hardenable hot-formed steel is heated in a furnace to a temperature which is smaller than an Ac 3 transformation point in an iron carbon diagram. A first region of the blank is then heated in a conductive heating station to a temperature above the Ac 3 transformation point and subsequently hardened in a hot forming and hardening tool to produce a steel part with at least two microstructured regions of different ductility.

Подробнее
Номер записи: 3
26-01-2012 дата публикации

High strength steel pipe for low-temperature usage having excellent buckling resistance and toughness of welded heat affected zone and method for producing the same

Номер: US20120018028A1
Автор: Junji Shimamura, Mitsuhiro Okatsu, Nobuo Shikanai, Nobuyuki Ishikawa
Принадлежит: JFE Steel Corp

An APIX100-grade high strength steel pipe includes a base material containing, in mass percentage, C: more than 0.03% and 0.08% or less, Si: 0.01% to 0.5%, Mn: 1.5% to 3.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01% to 0.08%, Nb: 0.005% to 0.025%, Ti: 0.005% to 0.025%, N: 0.001% to 0.010%, O: 0.005% or less, and B: 0.0003% to 0.0020%, further contains one or more of Cu, Ni, Cr, Mo, and V, satisfies 0.19≦P cm ≦0.25, the balance being Fe and unavoidable impurities, and has a TS of 760 to 930 MPa, a uniform elongation of 5% or more, and a YR of 85% or less; the seam weld metal has a specific composition.

Подробнее
Номер записи: 4
26-01-2012 дата публикации

Steel sheet for cans with excellent surface properties after drawing and ironing and method for producing the same

Номер: US20120018055A1
Автор: Hiroki Iwasa, Katsumi Kojima, Masaki Tada, Yusuke Nakagawa
Принадлежит: JFE Steel Corp

A component composition contains, by % by mass, 0.0016 to 0.01% of C, 0.05 to 0.60% of Mn, and 0.020 to 0.080% of Nb so that the C and Nb contents satisfy the expression, 0.4≦(Nb/C)×(12/93)≦2.5. In addition, the amount of Nb-based precipitates is 20 to 500 ppm by mass, the average grain diameter of the Nb-based precipitates is 10 to 100 nm, and the average crystal grain diameter of ferrite is 6 to 10 μm. Nb is added to ultra-low-carbon steel used as a base, and the amount and grain diameter of the Nb-based precipitates are controlled to optimize the pinning effect. Grain refinement of ferrite is achieved by specifying the Mn amount, thereby achieving softening and excellent resistance to surface roughness of steel.

Подробнее
Номер записи: 5
26-01-2012 дата публикации

Process for manufacturing a cold rolled trip steel product

Номер: US20120018058A1
Автор: Bruno De Cooman, Joachim Antonissen, Liesbeth Barbe, Lucia Tosal-Martinez, Marijke De Meyer, Serge Claessens, Sigrid Jacobs, Sven Vandeputte
Принадлежит: Arcelor France SA

The present invention is related to a process comprising a cold rolling step, for the production of uncoated, electro-galvanised or hot dip galvanised TRIP steel products, hot rolling a slab of a specific composition, wherein the finishing rolling temperature is higher than the Ar3 temperature, to form a hot-rolled substrate, cooling said substrate to a coiling temperature (CT) between 500° C. and 680° C., coiling said substrate at said coiling temperature, pickling said substrate to remove the oxides, cold rolling said substrate to obtain a reduction of thickness, with a minimum reduction of 40%.

Подробнее
Номер записи: 6
26-01-2012 дата публикации

Ferritic stainless steel with excellent heat resistance

Номер: US20120020827A1
Автор: Hiroki Ota, Takumi Ujiro, Tetsuyuki Nakamura, Yasushi Kato
Принадлежит: JFE Steel Corp

A ferritic stainless steel contains no expensive elements such as Mo and W, is free from the oxidation resistance loss caused by addition of Cu, and thereby has excellent levels of oxidation resistance (including water vapor oxidation resistance), thermal fatigue property, and high-temperature fatigue property. The ferritic stainless steel contains, in mass %, C at 0.015% or less, Si at 0.4 to 1.0%, Mn at 1.0% or less, P at 0.040% or less, S at 0.010% or less, Cr at 16 to 23%, Al at 0.2 to 1.0%, N at 0.015% or less, Cu at 1.0 to 2.5%, Nb at 0.3 to 0.65%, Ti at 0.5% or less, Mo at 0.1% or less, and W at 0.1% or less, the Si and the Al satisfying a relation Si (%)≧Al (%).

Подробнее
Номер записи: 7
09-02-2012 дата публикации

High-strength steel sheet, hot-dipped steel sheet, and alloy hot-dipped steel sheet that have excellent fatigue, elongation, and collision characteristics, and manufacturing method for said steel sheets

Номер: US20120031528A1
Автор: Koichi Goto, Kunio Hayashi, Naoki Matsutani, Nobuhiro Fujita, Toshimasa Tomokiyo
Принадлежит: Individual

This high-strength steel sheet includes: in terms of percent by mass, 0.03 to 0.10% of C; 0.01 to 1.5% of Si; 1.0 to 2.5% of Mn; 0.1% or less of P; 0.02% or less of S; 0.01 to 1.2% of Al; 0.06 to 0.15% of Ti; and 0.01% or less of N; and contains as the balance, iron and inevitable impurities, wherein a tensile strength is in a range of 590 MPa or more, and a ratio between the tensile strength and a yield strength is in a range of 0.80 or more, a microstructure includes bainite at an area ratio of 40% or more and the balance being either one or both of ferrite and martensite, a density of Ti(C,N) precipitates having sizes of 10 nm or smaller is in a range of 10 10 precipitates/mm 3 or more, and a ratio (Hvs/Hvc) of a hardness (Hvs) at a depth of 10 μm from a surface to a hardness (Hvc) at a center of a sheet thickness is in a range of 0.85 or more.

Подробнее
Номер записи: 8
22-03-2012 дата публикации

High-strength steel sheet and the method for production therefor

Номер: US20120070330A1
Автор: Astrid Frommeyer, Georg Frommeyer, Klaus Brokmeier, Masashi Ishii, Sven Leonhardt, Ursula Frommeyer, Yoshitaka Okitsu
Принадлежит: Honda Motor Co Ltd

A high-strength steel sheet comprises, by weight, not less than 0.25% and not more than 0.5% of C, not less than 4% and not more than 14% of Mn, not less than 6.5% and not more than 9.5% of Cr, and not less than 0.3% and not more than 3% of Si. The high-strength steel sheet satisfies the following formulas 1 and 2 and mainly consists of austenite, and the high-strength steel sheet has yield strength of not less than 1000 MPa and total elongation of not less than 20%. 12≦2.0Si+5.5Al+Cr+1.5Mo≦25   (1) 13 ≦30C+0.5Mn+0.3Cu+Ni+25N≦17   (2) (Each element symbol in the above formulas indicates the content (weight %) of the element)

Подробнее
Номер записи: 9
05-04-2012 дата публикации

Mechanical Components From Highly Recoverable, Low Apparent Modulus Materials

Номер: US20120080123A1
Автор: Christopher Dellacorte, II Santo Padula, Malcolm K. Stanford, Ronald D. Noebe
Принадлежит: Individual

A shape memory alloy for use as a mechanical component is formed of an intermetallic material having a low apparent modulus and a high hardness. The intermetallic material is conditioned to have a stable, superelastic response without irrecoverable deformation while exhibiting strains of at least 3%. The method of conditioning the intermetallic material is described. Another embodiment relates to lightweight materials known as ordered intermetallics that perform well in sliding wear applications using conventional liquid lubricants and are therefore suitable for high performance mechanical components such as gears and bearings.

Подробнее
Номер записи: 10
12-04-2012 дата публикации

Fabrication process of coated stamped parts and parts prepared from the same

Номер: US20120085467A1
Автор: Isabelle Thirion, Karl Michael Bader, Ludwig Schaller, Michael Alsmann, Pascal Drillet, Raisa Grigorieva, Thomas Vietoris, Uwe Paar
Принадлежит: ARCELORMITTAL INVESTIGACIÓN Y DESARROLLO SL

A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature T i comprised between T e −10° C. and T e , Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature T i up to a temperature T m comprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C./s, V being the heating rate between the temperature T i and the temperature T m , in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature T m for a time t m comprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

Подробнее
Номер записи: 11
26-04-2012 дата публикации

Method for producing partially hardened steel components

Номер: US20120097298A1
Автор: Andreas Sommer, Dieter Hartmann, Tobias Hägele
Принадлежит: voestalpine Metal Forming GmbH

The invention relates to a method for producing partially hardened steel components in which a blank is subjected to a temperature increase that is sufficient for a quench-hardening and after reaching a desired temperature, the blank is transferred to a forming tool in which the blank is quench-hardened or the blank is cold-formed and the component obtained by the cold-forming is then subjected to a temperature increase. During the heating of the blank or component, absorption masses rest against and/or are spaced with a small gap apart from regions that are intended to have a lower hardness and/or higher ductility; with regard to its expansion and thickness, its thermal conductivity, and its thermal capacity and/or with regard to its emissivity, the absorption mass is dimensioned so that the thermal energy acting on the component in the region to remain ductile flows through the component into the absorption mass.

Подробнее
Номер записи: 12
03-05-2012 дата публикации

HIGH Cr FERRITIC/MARTENSITIC STEELS HAVING AN IMPROVED CREEP RESISTANCE FOR IN-CORE COMPONENT MATERIALS IN NUCLEAR REACTOR, AND PREPARATION METHOD THEREOF

Номер: US20120106693A1
Автор: Chan Bock Lee, Chang Hee Han, Dohee Hahn, Jong Hyuk Baek, Jun Hwan Kim, Sung Ho Kim, Tae Kyu Kim, Woo Gon Kim, Yeong-II Kim
Принадлежит: Korea Atomic Energy Research Institute KAERI, Korea Hydro and Nuclear Power Co Ltd

Disclosed herein is a high Cr Ferritic/Martensitic steel comprising 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.10% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1.5 to 3.0% by weight of tungsten, 0.015 to 0.025% by weight of nitrogen, 0.01 to 0.02% by weight of boron and iron balance. By regulating the contents of alloying elements such as nitrogen, born, the high Cr Ferritic/Martensitic steel with to superior tensile strength and creep resistance is provided, and can be effectively used as an in-core component material for sodium-cooled fast reactor (SFR).

Подробнее
Номер записи: 13
03-05-2012 дата публикации

High strength steel sheet and method for manufacturing the same

Номер: US20120107633A1
Автор: Katsumi Nakajima, Katsumi Yamada, Kazuhiro Seto, Koichi Nakagawa, Satoshi Kinoshiro, Takeshi Yokota, Tetsuya Mega, Yuji Tanaka
Принадлежит: JFE Steel Corp

A high-strength steel sheet includes a composition containing, in mass percent, 0.08% to 0.20% of carbon, 0.2% to 1.0% of silicon, 0.5% to 2.5% of manganese, 0.04% or less of phosphorus, 0.005% or less of sulfur, 0.05% or less of aluminum, 0.07% to 0.20% of titanium, and 0.20% to 0.80% of vanadium, the balance being iron and incidental impurities.

Подробнее
Номер записи: 14
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.

Подробнее
Номер записи: 15
31-05-2012 дата публикации

Metal plate to be heated by radiant heat transfer and method of manufacturing the same, and metal processed product having portion with different strength and method of manufacturing the same

Номер: US20120135263A1
Автор: Kazuyuki Kawano, Shinichi Suzuki, Shintaro Yamanaka, Yasunori Itoh, Yoshifumi Kobayashi
Принадлежит: Individual

On part of a surface of a metal plate that is to be heated by radiant heat transfer with a near-infrared ray, a region where reflectance for a radiant ray is made lower than that of the original surface of the metal plate is formed. As reflectance reducing treatment, painting or thermal spraying in a blackish color, plating in a blackish color, treatment for increasing roughness of the surface of the metal plate, blasting, etching, blackening, surface layer quality changing treatment of the metal plate, or the like can be adopted. The metal plate is turned into a heated metal plate partially having a different temperature by being heated by radiant heat transfer, and thereafter, the heated metal plate is subjected to thermal processing accompanied by cooling, for example, by hot stamping.

Подробнее
Номер записи: 16
07-06-2012 дата публикации

High-strength hot-rolled steel sheet and method for manufacturing the same

Номер: US20120138197A1
Автор: Kazuhiro Seto, Masahide Watabe, Noriaki Kohsaka, Reiko Sugihara, Yasushi Tanaka
Принадлежит: JFE Steel Corp

A steel sheet contains, on a mass percent basis, 0.03%-0.12% C, 0.5% or less Si, 0.8%-1.8% Mn, 0.030% or less P, 0.01% or less S, 0.005%-0.1% Al, 0.01% or less N, 0.035%-0.100% Ti, and the balance being Fe and incidental impurities and has microstructures with a fraction of polygonal ferrite of 80% or more, the polygonal ferrite having an average grain size of 5 to 10 μm. The amount of Ti present in a precipitate having a size of less than 20 nm is 70% or more of the value of Ti* calculated using expression (1): Ti*=[Ti]−48×[N]/14  (1) where [Ti] and [N] represent a Ti content (percent by mass) and a N content percent by mass), respectively, of the steel sheet.

Подробнее
Номер записи: 17
21-06-2012 дата публикации

Method for the local heat treatment of gas turbine blades

Номер: US20120156630A1
Автор: Christian Hornig, Jens Weder
Принадлежит: MTU AERO ENGINES GMBH

A method for heat-treating gas turbine blades, namely for locally heat-treating at least one gas turbine blade in a blade section thereof; a blade root section, which is not to be heat-treated, of the gas turbine blade being positioned in a holding receptacle to prevent an unacceptable heating of the particular blade root section, which is not to be heat-treated, during the heat treatment of the particular blade section. The blade root section of the gas turbine blade is positioned in an interior space in a way that allows a remaining interior space of the holding receptacle, to be filled with a filler material; the holding receptacle, together with the gas turbine blade, being subsequently positioned in a heat treatment chamber to enable the gas turbine blade in the heat treatment chamber to undergo local heat treatment under vacuum.

Подробнее
Номер записи: 18
12-07-2012 дата публикации

Method of manufacturing gear

Номер: US20120177457A1
Автор: Eiri Nagata
Принадлежит: Aisin Seiki Co Ltd

A method of manufacturing a gear by a skiving process, the skiving process utilizing a cutter including a rotational axis inclined to a rotational axis of a work to be processed into the gear, the skiving process feeding the cutter in a tooth trace direction of a tooth to be formed at the work in a state where the cutter rotates in synchronization with the work, the method includes a surface hardening process for hardening a work surface of the work before the skiving process is performed.

Подробнее
Номер записи: 19
12-07-2012 дата публикации

Bearing steels

Номер: US20120177527A1
Автор: Aidan Michael Kerrigan, Henrik Karlsson, Mohamed Sherif
Принадлежит: SKF AB

There is provided a novel bearing steel composition and a method of forming a bearing. The bearing steel composition comprises: Carbon 0.4 to 0.8 wt %; Nitrogen 0.1 to 0.2 wt %; Chromium 12 to 18 wt %; Molybdenum 0.7 to 1.3 wt %; Silicon 0.3 to 1 wt %; Manganese 0.2 to 0.8 wt %; and Iron 78 to 86.3 wt %.

Подробнее
Номер записи: 20
26-07-2012 дата публикации

High-strength seamless steel tube, having excellent resistance to sulfide stress cracking, for oil wells and method for manufacturing the same

Номер: US20120186704A1
Автор: Haruo Nakamichi, Katsumi Yamada, Kenichiro Eguchi, Mitsuo Kimura, Yasuhide Ishiguro, Yuji Tanaka
Принадлежит: JFE Steel Corp

A seamless steel tube contains 0.15% to 0.50% C, 0.1% to 1.0% Si, 0.3% to 1.0% Mn, 0.015% or less P, 0.005% or less S, 0.01% to 0.1% Al, 0.01% or less N, 0.1% to 1.7% Cr, 0.4% to 1.1% Mo, 0.01% to 0.12% V, 0.01% to 0.08% Nb, and 0.0005% to 0.003% B or further contains 0.03% to 1.0% Cu on a mass basis and has a microstructure which has a composition containing 0.40% or more solute Mo and a tempered martensite phase that is a main phase and which contains prior-austenite grains with a grain size number of 8.5 or more and 0.06% by mass or more of a dispersed M 2 C-type precipitate with substantially a particulate shape.

Подробнее
Номер записи: 21
26-07-2012 дата публикации

Nonmagnetic stainless steel, member for radio-controlled timepiece, production process of nonmagnetic stainless steel and radio wave receiver

Номер: US20120190321A1
Автор: Junichi Sato, Kenji Yokoyama, Toshihiro Uehara
Принадлежит: Casio Computer Co Ltd, Hitachi Metals Ltd

A nonmagnetic stainless steel which has a higher electrical resistivity than existing nonmagnetic alloys, a production process for producing the stainless steel, and a radio wave receiver. The receiver has a main case and rear cover constituted of a nonmagnetic stainless steel having an electrical resistivity as high as more than 100 μΩ·cm and consisting of C: not more than 0.1%, Si: 4.0-7.5%, Mn: not more than 2.0%, Ni: 25.5-30.0%, Cr: 15.0-20.0%, Mo: 0.1-3.0%, Cu: 0-2.0%, in mass % and the balance Fe and impurities. Even if some variable magnetic flux generated by a coil of an antenna runs through the main case and the rear cover, the receiving efficiency of the antenna can be prevented from being reduced by eddy current loss and a sufficient radio receiving sensitivity can be obtained. This nonmagnetic stainless steel is produced by hot and/or cold plastic working and subsequent solution treating conducted at 1,000-1,180° C.

Подробнее
Номер записи: 22
09-08-2012 дата публикации

Heat treatment of martensitic stainless steel after remelting under a layer of slag

Номер: US20120199252A1
Автор: Laurent Ferrer, Patrick Philipson
Принадлежит: SNECMA SAS

A method fabricating a stainless martensitic steel, including electroslag remelting then cooling an ingot of the steel, then at least one austenitic thermal cycle heating the ingot above its austenitic temperature followed by a cooling. During each cooling: if the cooling is not followed by an austenitic thermal cycle, holding the ingot at a holding temperature included in the ferritic-pearlitic transformation nose for a hold time longer than sufficient for transforming the austenite into a ferritic-pearlitic structure in the ingot as completely as possible at the holding temperature; if the cooling is followed by an austenitic thermal cycle, before its minimum temperature falls below the martensitic transformation start temperature, the ingot is either held throughout the period between the two austenitic thermal cycles at a temperature above the austenitic transformation completion temperature on heating, or held at the holding temperature included in the ferritic-pearlitic transformation nose.

Подробнее
Номер записи: 23
09-08-2012 дата публикации

Corrosion resistant metal products

Номер: US20120202088A1
Автор: Antonino Giorgio Cacace
Принадлежит: Cladinox International Ltd Australia

A billet includes a solid steel body and an alloy cladding. The cladding may include a square tube in which the body is inserted with an interface at which the cladding becomes bonded to the body when the billet is heated and rolled or otherwise worked into a ferrous product. At least one element composed of a mass of finely divided scavenging aluminium, titanium or magnesium, is placed in the tube adjacent the body and separate from the interface. The elements are advantageously compressed into briquettes which scavenge oxygen from residual air at the interface to prevent oxidation of the cladding at the interface. The tube may be closed to prevent gases outside the billet from penetrating to the interface. Alternatively, reliance may be placed on the briquettes to scavenge oxygen from the residual air and also from atmospheric air and furnace gases before they can penetrate to the interface.

Подробнее
Номер записи: 24
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.

Подробнее
Номер записи: 25
08-11-2012 дата публикации

Austenitic stainless steel pipe excellent in steam oxidation resistance and manufacturing method therefor

Номер: US20120279607A1
Автор: Katsuki Tanaka, Masahiro Seto, Mitsuru Yoshizawa, Yoshitaka Nishiyama
Принадлежит: Sumitomo Metal Industries Ltd

There is provided an austenitic stainless steel pipe excellent in steam oxidation resistance. The austenitic stainless steel pipe excellent in steam oxidation resistance contains, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, and is configured so that a region satisfying the following Formula exists in a metal structure at a depth of 5 to 20 μm from the inner surface of the steel pipe: (α/β)×δ/ε×100≧0.3 where the meanings of symbols in the above Formula are as follows: α: sum total of the number of pixels of digital image in region in which orientation difference of adjacent crystals detected by electron backscattering pattern is 5 to 50 degrees β: the number of total pixels of digital image in region of measurement using electron backscattering pattern ε: analysis pitch width of electron backscattering pattern (μm) δ: grain boundary width (μm).

Подробнее
Номер записи: 26
22-11-2012 дата публикации

Drawn heat treated steel wire for high strength spring use and pre-drawn steel wire for high strength spring use

Номер: US20120291927A1
Автор: Masayuki Hashimura, Tetsushi Chida
Принадлежит: Nippon Steel Corp

Drawn heat treated steel wire for high strength spring use is provided containing, by mass %, C: 0.67% to less than 0.9%, Si: 2.0 to 3.5%, Mn: 0.5 to 1.2%, Cr: 1.3 to 2.5%, N: 0.003 to 0.007%, and Al: 0.0005% to 0.003%, having Si and Cr satisfying the following formula: 0.3%≦Si−Cr≦1.2%, and having a balance of iron and unavoidable impurities, having as impurities, P: 0.025% or less and S: 0.025% or less, furthermore having a circle equivalent diameter of undissolved spherical carbides of less than 0.2 μm, further having, as a metal structure, at least residual austenite in a volume rate of over 6% to 15%, having a prior austenite grain size number of #10 or more, and having a circle equivalent diameter of undissolved spherical carbides of less than 0.2 μm.

Подробнее
Номер записи: 27
29-11-2012 дата публикации

Method for manufacturing grain oriented electrical steel sheets

Номер: US20120298265A1
Автор: Kenichi Sadahiro
Принадлежит: JFE Steel Corp

In a method for manufacturing grain oriented electrical steel sheets from a slab, controlling the steel sheet temperature so as to satisfy T (t)<FDT−(FDT−700)×t/6 (wherein T (t): steel sheet temperature (° C.), FDT: finishing temperature (° C.) and t: time (sec) after the completion of finish rolling) throughout the entire length of a coil during cooling after the completion of finish rolling in hot rolling, and controlling the steel sheet temperature of a tip portion of the coil representing 10% of the length of the coil to be not less than 650° C. at a lapse of 3 seconds from the completion of hot rolling, thus manufacturing a grain oriented electrical steel sheet exhibiting excellent magnetic properties throughout the entire coil length.

Подробнее
Номер записи: 28
06-12-2012 дата публикации

Non-quenched and tempered steel having ultrafine grained pearlite structure and method of manufacturing the same

Номер: US20120305146A1
Автор: Joong Keun Park, Jun Ho Chung, Sung Hwan Park, Tae Hyung Kim, Young Sang Ko
Принадлежит: Hyundai Motor Co, Kia Motors Corp, Korea Advanced Institute of Science and Technology KAIST

This invention relates to a method of manufacturing non-quenched and tempered steel having an ultrafine grained pearlite structure, including hot forging a steel material so as to be high-temperature compression deformed, thus obtaining a hot forged body; rapidly cooling the hot forged body to a low-temperature pearlite transformation range, thus obtaining a supercooled hot forged body; isothermally holding the supercooled hot forged body in the low-temperature pearlite transformation range so as to be isothermally transformed; and air-cooling the hot forged body; and to non-quenched and tempered steel manufactured thereby.

Подробнее
Номер записи: 29
13-12-2012 дата публикации

Joining of parts via magnetic heating of metal aluminum powders

Номер: US20120315493A1
Автор: Ian Baker
Принадлежит: Dartmouth College

A method of joining at least two parts includes steps of dispersing a joining material comprising a multi-phase magnetic metal-aluminum powder at an interface between the at least two parts to be joined and applying an alternating magnetic field (AMF). The AMF has a magnetic field strength and frequency suitable for inducing magnetic hysteresis losses in the metal-aluminum powder and is applied for a period that raises temperature of the metal-aluminum powder to an exothermic transformation temperature. At the exothermic transformation temperature, the metal-aluminum powder melts and resolidifies as a metal aluminide solid having a non-magnetic configuration.

Подробнее
Номер записи: 30
27-12-2012 дата публикации

Method for hot shaping a workpiece and agent for reducing the heat emission

Номер: US20120325117A1
Автор: Karin Rockenschaub, Wilfried Marketz
Принадлежит: Voestalpine Boehler Aerospace GmbH and Co KG

A process for hot shaping a workpiece of metal or an intermetallic compound at a temperature of higher than about 1000° C. The method comprises at least partially coating the surface of the workpiece with a coating agent that comprises an oxide phase and an additive and/or an adhesive before processing the workpiece into a formed body or a rolling product. A coating agent for reducing the heat emission from the workpiece comprises a predominant amount of an oxide phase. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Подробнее
Номер записи: 31
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.

Подробнее
Номер записи: 32
27-12-2012 дата публикации

Method for limiting surface recrystallization

Номер: US20120328903A1
Автор: Andrii Marynskyi, Carl R. Soderberg, Igor V. Belousov, Vadim Ivanovich Bondarchuk, Yuriy G. Kononenko
Принадлежит: Individual

A method to limit surface zone recrystallization in a superalloy article includes limiting recrystallization in a surface zone of a superalloy article by treating the superalloy article in an oxygen-containing environment to introduce oxygen into the surface zone in an amount sufficient to pin any new grain boundaries in the surface zone.

Подробнее
Номер записи: 33
03-01-2013 дата публикации

Manufacturing method of grain-oriented electrical steel sheet

Номер: US20130000786A1
Автор: Chie Hama, Kazumi Mizukami, Kenichi Murakami, Shuichi Nakamura, Yoshiyuki Ushigami
Принадлежит: Individual

A predetermined steel containing Te: 0.0005 mass % to 0.0050 mass % is heated to 1320° C. or lower to be subjected to hot rolling, and is subjected to annealing, cold rolling, decarburization annealing, and nitridation annealing, and thereby a decarburized nitrided steel sheet is obtained. Further, an annealing separating agent is applied on the surface of the decarburized nitrided steel sheet and finish annealing is performed, and thereby a glass coating film is formed. The N content of the decarburized nitrided steel sheet is set to 0.0150 mass % to 0.0250 mass % and the relationship of 2×[Te]+[N]≦0.0300 mass % is set to be established. Note that [Te] represents the Te content and [N] represents the N content.

Подробнее
Номер записи: 34
03-01-2013 дата публикации

High-strength hot-rolled steel sheet and method of manufacturing the same

Номер: US20130000791A1
Автор: Junji Haji, Osamu Kawano, Yuzo Takahashi
Принадлежит: Individual

On a cross section with a sheet width direction of a high-strength hot-rolled steel sheet set as a normal line, with regard to an inclusion having a major diameter of 3.0 μm or more, a maximum of a major diameter/minor diameter ratio expressed by (a major diameter of the inclusion)/(a minor diameter of the inclusion) is 8.0 or less, and a sum total of a rolling direction length per 1 mm 2 cross section of a predetermined inclusion group composed of plural inclusions each having a major diameter of 3.0 μm or more and a predetermined extended inclusion having a length in a rolling direction of 30 μm or more is 0.25 mm or less. The plural inclusions composing the predetermined inclusion group congregate in both the rolling direction and a direction perpendicular to the rolling direction 50 μm or less apart from each other. The predetermined extended inclusion is spaced over 50 μm apart from all the inclusions each having a major diameter of 3.0 μm or more in at least either the rolling direction or the direction perpendicular to the rolling direction.

Подробнее
Номер записи: 35
03-01-2013 дата публикации

Ferritic stainless steel sheet excellent in oxidation resistance and ferritic stainless steel sheet excellent in heat resistance and method of production of same

Номер: US20130004360A1
Автор: Junichi Hamada, Norihiro Kanno, Yoshiharu Inoue
Принадлежит: Individual

Ferritic stainless steel sheet which has a high oxidation resistance and scale spallation resistance even at a high temperature near 1000° C., characterized by containing C: 0.020% or less, N: 0.020% or less, Si: over 0.10 to 0.35%, Mn: 0.10 to 0.60%, Cr: 16.5 to 20.0%, Nb: 0.30 to 0.80%, Mo: over 2.50 to 3.50%, and Cu: 1.00 to 2.50%, having an amount of increase of oxidation after a continuous oxidation test in the air at 1000° C. for 200 hours of 4.0 mg/cm 2 or less, and having an amount of scale spallation of 1.0 mg/cm 2 or less.

Подробнее
Номер записи: 36
03-01-2013 дата публикации

Ferrite-based stainless steel for use in components of automobile exhaust system

Номер: US20130004361A1
Автор: Nobuhiko Hiraide, Shinichi Teraoka, Shunji Sakamoto
Принадлежит: Individual

This ferritic stainless steel for components of an automobile exhaust system includes, in terms of percent by mass: C: ≦0.015%; Si: 0.01% to 0.50%; Mn: 0.01% to 0.50%; P: ≦0.050%; S: ≦0.010%; N: ≦0.015%; Al: 0.010% to 0.100%; Cr: 16.5% to 22.5%; Ni: 0.5% to 2.0%; and Sn: 0.01% to 0.50%, and further includes either one or both of Ti: 0.03% to 0.30% and Nb: 0.03% to 0.30%, with a remainder being Fe and inevitable impurities.

Подробнее
Номер записи: 37
03-01-2013 дата публикации

High-nitrogen stainless steel pipe with high strength, high ductility, and excellent corrosion and heat resistance and process for producing same

Номер: US20130004883A1
Автор: Harumatu Miura, Kazuo Oda
Принадлежит: ODA INDUSTRIES Co Ltd

Provided is a novel high-nitrogen stainless-steel pipe which is not obtained with any conventional technique, the stainless-steel pipe having high strength, high ductility, and excellent corrosion and heat resistance and being obtained through size reduction of crystal grains and strengthening by slight plastic working besides formation of a gradient structure in which the concentration of solid-solution nitrogen continuously decreases gradually from the surface. Also provided are hollow materials of various shapes and sizes which are formed from the steel pipe and processes for producing the steel pipe and the hollow materials. An austenitic stainless-steel pipe is treated in a range of the temperatures not higher than the critical temperature for crystal grain enlargement of the steel pipe material to cause nitrogen (N) to be absorbed into the surface of the pipe and diffused into the solid phase, while minimizing the enlargement of crystal grains during the treatment. Thus, a gradient structure is formed, the structure including a part that is close to the surface part of the pipe and has been highly strengthened by the formation of a high-concentration solid solution of N and a part in which ductility gradually increases toward around the center of the cross-section of the pipe as the N concentration decreases. Thereafter, the pipe is subjected to size reduction of crystal grains by utilizing, for example, eutectoid transformation of the austenite phase, thereby greatly improving the elongation (ductility) of the steel pipe. Furthermore, the steel pipe is strengthened by slight plastic working to give a high-nitrogen austenitic stainless-steel pipe having high strength, high ductility, and excellent corrosion and heat resistance. A plurality of the thus-obtained high-nitrogen austenitic stainless steel pipes of the same quality are disposed one over another so as to result in dimensions, e.g., diameter and wall thickness, according to the use or strength level, ...

Подробнее
Номер записи: 38
10-01-2013 дата публикации

High-strength steel sheet and method for producing same

Номер: US20130008568A1
Автор: Daisuke Maeda, Genichi Shigesato, Kenichi Yamamoto, Naoki Yoshinaga, Satoshi Hirose, Yoshihiro SUWA
Принадлежит: Nippon Steel Corp

A high-strength steel sheet includes, by mass %, C: 0.03% to 0.30%, Si: 0.08% to 2.1%, Mn: 0.5% to 4.0%, P: 0.05% or less, S: 0.0001% to 0.1%, N: 0.01% or less, acid-soluble Al: more than 0.004% and less than or equal to 2.0%, acid-soluble Ti: 0.0001% to 0.20%, at least one selected from Ce and La: 0.001% to 0.04% in total, and a balance of iron and inevitable impurities, in which [Ce], [La], [acid-soluble Al], and [S] satisfy 0.02≦([Ce]+[La])/[acid-soluble Al]<0.25, and 0.4≦([Ce]+[La])/[S]≦50 in a case in which the mass percentages of Ce, La, acid-soluble Al, and S are defined to be [Ce], [La], [acid-soluble Al], and [S], respectively, and a microstructure includes 1% to 50% of martensite in terms of an area ratio.

Подробнее
Номер записи: 39
31-01-2013 дата публикации

Twin roll sheet casting of bulk metallic glasses and composites in an inert environment

Номер: US20130025746A1
Автор: Douglas C. Hofmann, Scott N. ROBERTS, William L. Johnson
Принадлежит: Apple Inc

Sheet casting of metallic glasses and twin roll sheet casting of bulk metallic glasses and composite in an inert environment. Samples may be heated by RF to a temperature in the semi-solid region. After semi-solid processing, the partial liquid then may be poured or injected to achieve the desired shape. Plates of metallic glasses and/or metallic glass matrix composites may be formed (for example, through diecasting) and serve as a pre-form for rolling. In this configuration, the plates may be lowered through a radio frequency coil into compressing wheels, directly next to or below the coil. As the plates pass through the coil they may heat to above the glass transition temperature. Next, they may be fed into the rolling wheel to thermoplasically form the plates into thinner sheets.

Подробнее
Номер записи: 40
28-02-2013 дата публикации

Spring steel and method for manufacturing the same

Номер: US20130048158A1
Автор: Hideto Kimura, Kazukuni Hase, Minoru Honjo
Принадлежит: JFE Steel Corp

Disclosed is high strength spring steel that can limit the depth of pitting occurring when corroded and therefore possesses high strength as well as excellent pitting corrosion resistance and corrosion fatigue property, with a composition containing: C: greater than 0.35 mass % and less than 0.50 mass %; Si: greater than L75 mass % and less than or equal to 3.00 mass %; Mn: 0.2 mass % to 1.0 mass %; Cr: 0.01 mass % to 0.04 mass %; P: 0.025 mass % or less; S: 0.025 mass % or less; Mo: 0.1 mass % to 1.0 mass %; and 0: 0.0015 mass % or less, under a condition that a PC value calculated by PC=4.2×([C]+[Mn])+0.1×(1/[Si]+1/[Mo])+20.3×[Cr]+0.001×(1/[N]) is greater than 3.3 and equal to or less than 8.0. Also disclosed is a preferred method for manufacturing the same.

Подробнее
Номер записи: 41
07-03-2013 дата публикации

Automobile chassis part excellent in low cycle fatigue characteristics and method of production of same

Номер: US20130056115A1
Автор: Hideyuki Nakamura, Isao Anai, Takaaki Fukushi
Принадлежит: Individual

An automobile chassis part which is excellent in low cycle fatigue characteristics, characterized by being formed by steel which contains, by mass %, C: 0.02 to 0.10%, Si: 0.05 to 1.0%, Mn: 0.3 to 2.5%, P: 0.03% or less, S: 0.01% or less, Ti: 0.005 to 0.1%, Al: 0.005 to 0.1%, N: 0.0005 to 0.006%, and B: 0.0001 to 0.01 and has a balance of Fe and unavoidable impurities, in which 80% or more of the part structure comprises a bainite structure and in which a portion where a ratio R/t of the thickness “t” and external surface curvature radius R is 5 or less has an X-ray half width of an (211) plane of 5 (deg) or less.

Подробнее
Номер записи: 42
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.

Подробнее
Номер записи: 43
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.

Подробнее
Номер записи: 44
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.

Подробнее
Номер записи: 45
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.

Подробнее
Номер записи: 46
23-05-2013 дата публикации

Manufacturing method of non-oriented electrical steel sheet

Номер: US20130125601A1
Автор: Masahiro Fujikura, Takeshi Kubota
Принадлежит: Nippon Steel and Sumitomo Metal Corp

A steel having a predetermined composition is hot-rolled so as to form a steel strip, the steel strip is subjected to first cold-rolling, the steel strip is subjected to intermediate annealing, the steel strip is subjected to second cold-rolling, and the steel strip is subjected to finish annealing. A finish temperature in the hot-rolling is 900° C. or less, annealing is not performed between the hot-rolling and the first cold-rolling, and a rolling reduction in the second cold-rolling is not less than 40% nor more than 85%.

Подробнее
Номер записи: 47
23-05-2013 дата публикации

Grain oriented electrical steel sheet and method for manufacturing the same

Номер: US20130130043A1
Автор: Hiroi Yamaguchi, Seiji Okabe, Takeshi Omura
Принадлежит: JFE Steel Corp

A grain oriented electrical steel sheet is subjected to magnetic domain refining treatment by electron beam irradiation and exhibits excellent low-noise properties when assembled as an actual transformer, in which a ratio (Wa/Wb) of a film thickness (Wa) of the forsierite film on a strain-introduced side of the steel sheet to a film thickness (Wb) of the forsierite film on a non-strain-introduced side of the steel sheet is 0.5 or higher, a magnetic domain discontinuous portion in a surface of the steel sheet on the strain-introduced side has an average width of 150 to 300 μm, and a magnetic domain discontinuous portion in a surface of the steel sheet on the non-strain-introduced side has an average width of 250 to 500 μm.

Подробнее
Номер записи: 48
30-05-2013 дата публикации

High-strength cold rolled sheet having excellent formability and crashworthiness and method for manufacturing the same

Номер: US20130133792A1
Автор: Saiji Matsuoka, Shinjiro Kaneko, Tatsuya Nakagaito, Yoshiyasu Kawasaki
Принадлежит: JFE Steel Corp

A high-strength cold rolled steel sheet has excellent formability and crashworthiness and includes, on a mass % basis, C: 0.05 to 0.3%, Si: 0.3 to 2.5%. Mn: 0.5 to 3.5%, P: 0.003 to 0.100%, 5: 0.02% or less, Al: 0.010 to 0.5%, the balance being iron and unavoidable impurities, the high-strength cold rolled steel sheet having a microstructure including 20% or more of ferrite on an area fraction basis, 10 to 60% of tempered martensite on an area fraction basis, 0 to 10% of martensite on an area fraction basis, and 3 to 15% of retained austenite on a volume fraction basis.

Подробнее
Номер записи: 49
30-05-2013 дата публикации

Complex metallographic structured high strength steel and method of manufacturing

Номер: US20130136950A1
Автор: Weiping Sun
Принадлежит: Nucor Corp

A multi-phase steel sheet having microstructure having in combination ferrite, martensite of between 3% and 65% by volume, and at least one microstructure selected from the group consisting of, bainite and retained austenite, and having fine complex precipitates selected from the group of TiC, NbC, TiN, NbN, (Ti.Nb)C, (Ti.Nb)N, and (Ti.Nb)(C.N) particles having at least 50% smaller than 20 nm in size, and physical properties having tensile strength greater than about 780 megapascals and at least one of the properties of elongation greater than about 10%, yield ratio greater than about 70%, and hole expansion ratio greater than about 50%.

Подробнее
Номер записи: 50
13-06-2013 дата публикации

Method of producing non-oriented electrical steel sheet

Номер: US20130146187A1
Автор: Masaaki Kohno, Yoshiaki Zaizen, Yoshihiko Oda
Принадлежит: JFE Steel Corp

Disclosed is a method for producing a non-oriented magnetic steel sheet, wherein a steel slab that consists of 0.01-0.1 mass % of C, 4 mass % or less of Si, 0.05-3 mass % of Mn, 3 mass % or less of Al, 0.005 mass % or less of S, 0.005 mass % or less of N and the balance made up of Fe and unavoidable impurities is subjected to hot rolling, cold rolling and final annealing. By carrying out the final annealing, while setting the average heating rate during the heating to 100° C./sec or more and setting the soaking temperature within the temperature range of 750-1100° C., a non-oriented magnetic steel sheet that has extremely increased magnetic flux density in the rolling direction of the steel sheet is advantageously produced.

Подробнее
Номер записи: 51
27-06-2013 дата публикации

Method for producing a tempered martensitic heat resistant steel for high temperature application

Номер: US20130160905A1
Автор: Cheng Liu, Peter Francis Morris, Philip Clarke, Urszula Alicja Sachadel
Принадлежит: TATA STEEL NEDERLAND TECHNOLOGY BV

A method for producing a tempered martensitic heat resistant steel for high temperature applications at an application temperature of up to 650° C. and to a steel produced by the method. The use of the steel in the production of components for high temperature applications such as turbine blades or casings, bolting and boiler tubes, heat exchangers or other elements in power generation systems.

Подробнее
Номер записи: 52
04-07-2013 дата публикации

High strength hot rolled steel sheet having excellent bendability and method for manufacturing the same

Номер: US20130167985A1
Автор: Hayato Saito, Katsumi Nakajima, Noriaki Moriyasu, Takayuki Murata, Yoshimasa Funakawa
Принадлежит: JFE Steel Corp

A steel sheet including C at 0.05 to 0.15%, Si at 0.2 to 1.2%, Mn at 1.0 to 2.0%, P at not more than 0.04%, S at not more than 0.0030%, Al at 0.005 to 0.10%, N at not more than 0.005% and Ti at 0.03 to 0.13%, the balance being Fe and inevitable impurities, includes surface regions having an area fraction of bainite of less than 80% and an area fraction of a ferrite phase with a grain diameter of 2 to 15 μm of not less than 10%, the surface regions extending from both surfaces of the steel sheet each to a depth of 1.5 to 3.0% relative to a total sheet thickness, as well as an inner region other than the surface regions having an area fraction of a bainite phase of more than 95%, and has a tensile strength of not less than 780 MPa.

Подробнее
Номер записи: 53
04-07-2013 дата публикации

Steel part for machine structural use and manufacturing method thereof

Номер: US20130167986A1
Автор: Hiromasa Takada, Manabu Kubota, Shinya Teramoto
Принадлежит: Nippon Steel and Sumitomo Metal Corp

The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.25 to 0.50%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

Подробнее
Номер записи: 54
04-07-2013 дата публикации

Low Iron Loss High Strength Non-Oriented Electromagnetic Steel Sheet and Method for Manufacturing Same

Номер: US20130167987A1
Автор: Jae-Kwan Kim, Jae-Song Kim, Su-Yong Sin, Yong-Soo Kim
Принадлежит: Posco Co Ltd

Provided is a low iron loss high strength non-oriented electromagnetic steel sheet and a method for manufacturing the same. The method comprises hot-rolling a slab comprising 0.005 weight % or less of C, 4.0 weight % or less of Si, 0.1 weight % or less of P, 0.03 weight % or less of S, 0.1 to 2.0 weight % of Mn, 0.3 to 2.0 weight % of Al, 0.003 weight % or less of N, 0.005 weight % or less of Ti, the remainder being Fe and unavoidable impurities, cold-rolling the slab, and finally annealing the slab such that the fractional area of the non-recrystallization tissue at the cross sectional surface of the steel sheet is 50% or lower (not including 0%).

Подробнее
Номер записи: 55
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.

Подробнее
Номер записи: 56
25-07-2013 дата публикации

Carburizing steel having excellent cold forgeability and method of manufacturing the same

Номер: US20130186522A1
Автор: Katsuyuki Ichimiya, Shinji Mitao
Принадлежит: JFE Steel Corp

A carburizing steel has a composition containing, in mass %, C: 0.1-0.35%; Si: 0.01-0.22%; Mn: 0.3-1.5%; Cr: 1.35-3.0%; P: 0.018% or less; S: 0.02% or less; Al: 0.015-0.05%; N: 0.008-0.015%; and O: 0.0015% or less, each being contained in an amount within a range satisfying formulas (1), (2) and (3) below, and the balance of the composition being Fe and incidental impurities, and the carburizing steel having microstructures before spheroidizing annealing such that a total microstructure proportion of ferrite and pearlite is 85% or more and an average ferrite grain size is 25 μm or less. 3.1≧{([% Si]/2)+[% Mn]+[% Cr]}≧2.2   (1) [% C]−([% Si]/2)+([% Mn]/5)+2[% Cr]≧3.0   (2) 2.5≧[% Al]/[% N]≧1.7   (3) [% M] represents content (in mass %) of element M.

Подробнее
Номер записи: 57
08-08-2013 дата публикации

Method for manufacturing hot stamped body having vertical wall and hot stamped body having vertical wall

Номер: US20130199676A1
Автор: Kunio Hayashi, Toshimasa Tomokiyo, Toshimitsu Aso
Принадлежит: Individual

The present invention provides a method for manufacturing a hot stamped body having a vertical wall, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac 1 ° C. and lower than Ac 3 ° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.

Подробнее
Номер записи: 58
22-08-2013 дата публикации

Method for producing alloy

Номер: US20130213531A1
Автор: Jun Tamai, Toshiya Inoue
Принадлежит: Canon Inc

To provide an alloy which can suppress minute temporal deformation of a Super Invar alloy as much as possible, and a method for producing the alloy. The alloy of the present invention includes iron, nickel, and cobalt, which are the basic components of a Super Invar alloy, and is characterized in that an amount of a fraction which has not carbidized in carbon contained in the alloy is 0.010 wt % or less.

Подробнее
Номер записи: 59
22-08-2013 дата публикации

Abrasion resistant steel plate which exhibits excellent weld toughness and excellent delayed fracture resistance

Номер: US20130216422A1
Автор: Keiji Ueda, Shinichi Suzuki
Принадлежит: JFE Steel Corp

Provided is an abrasion-resistant steel plate or sheet which exhibits excellent weld toughness and excellent delayed fracture resistance and is thus suitable for construction machines, industrial machines, and so on. Specifically provided is a steel plate or sheet which contains, in mass %, 0.20 to 0.30% of C, 0.05 to 1.0% of Si, 0.40 to 1.2% of Mn, 0.010% or less of P, 0.005% or less of S, 0.40 to 1.5% of Cr, 0.005 to 0.025% of Nb, 0.005 to 0.03% of Ti, 0.1% or less of Al, 0.01% or less of N, and, as necessary, one or more of Mo, W, B, Cu, Ni, V, REM, Ca and Mg, and has a DI* of 45 to 180 while satisfying the relationship: C+Mn/4−Cr/3+10P≦0.47, and which has a microstructure that comprises martensite as the matrix phase. DI*=33.85×(0.1×C) 0.5 ×(0.7×Si+1)×(3.33×Mn+1)×(0.35×Cu+1)×(0.36×Ni+1)×(2.16×Cr+1)×(3×Mo+1)×(1.75×V+1)×(1.5×W+1)

Подробнее
Номер записи: 60
12-09-2013 дата публикации

High hardness, high toughness iron-base alloys and methods for making same

Номер: US20130233454A1
Автор: Glenn J. Swiatek, Ronald E. Bailey, Thomas R. Parayil
Принадлежит: ATI Properties LLC

An aspect of the present disclosure is directed to low-alloy steels exhibiting high hardness and an advantageous level of multi-hit ballistic resistance with low or no crack propagation imparting a level of ballistic performance suitable for military armor applications. Various embodiments of the steels according to the present disclosure have hardness in excess of 550 BHN and demonstrate a high level of ballistic penetration resistance relative to conventional military specifications.

Подробнее
Номер записи: 61
19-09-2013 дата публикации

Bake-hardenable high-strength cold-rolled steel sheet and method of manufacturing the same

Номер: US20130240094A1
Автор: Masaharu Oka, Satoshi Akamatsu
Принадлежит: Nippon Steel and Sumitomo Metal Corp

The present invention provides a bake-hardenable high-strength cold-rolled steel sheet having excellent bake hardenability, cold aging resistance, and deep-drawability, and reduced planar anisotropy, containing chemical components in % by mass of: C: 0.0010% to 0.0040%, Si: 0.005% to 0.05%, Mn: 0.1% to 0.8%, P: 0.01% to 0.07%, S: 0.001% to 0.01%, Al: 0.01% to 0.08%, N: 0.0010% to 0.0050%, Nb: 0.002% to 0.020%, and Mo: 0.005% to 0.050%, a value of [Mn %]/[P %] being in the range of 1.6 to 45, where [Mn %] is an amount of Mn and [P %] is an amount of P, an amount of C in solid solution obtained from [C %]−(12/93)×[Nb %] being in the range of 0.0005% to 0.0025%, where [C %] is an amount of C and [Nb %] is an amount of Nb, with a balance including Fe and inevitable impurities, wherein the bake-hardenable high-strength cold-rolled steel sheet satisfies the following Equation (1), where X(222), X(110), and X(200) represent ratios of integrated intensity of X-ray diffraction of {222} plane, {110} plane, and {200} plane, respectively, being parallel to a plane located at a depth of ¼ plate thickness measured from the surface of the steel sheet, and the bake-hardenable high-strength cold-rolled steel sheet has tensile strength in the range of 300 MPa to 450 MPa. X (222)/{ X (110)+ X (200)}≧3.0   Equation (1)

Подробнее
Номер записи: 62
19-09-2013 дата публикации

High strength galvanized steel sheet having excellent formability and method for manufacturing the same

Номер: US20130244056A1
Автор: Hidetaka Kawabe, Kazuhiro Seto, Kenji Kawamura
Принадлежит: JFE Steel Corp

A high strength galvanized steel sheet having excellent formability, includes a steel sheet which is a base sheet and a galvanized layer on a surface of the steel sheet, wherein the steel sheet is a high strength steel sheet which has a composition including, by mass %, 0.08 to 0.15% of C, 0.5 to 1.5% of Si, 0.5 to 1.5% of Mn, 0.1% or less of P, 0.01% or less of S, 0.01 to 0.1% of Al, 0.005% or less of N, and the balance Fe with inevitable impurities, and a microstructure composed of 75 to 90% of a ferrite phase as a main phase and 10 to 25% of a second phase including at least pearlite in terms of an area fraction with respect to the entire microstructure; an average grain size of the pearlite is 5 μm or smaller; and the pearlite has an area fraction of 70% or greater with respect to the total area of the second phase.

Подробнее
Номер записи: 63
17-10-2013 дата публикации

Hot-dip galvanized steel sheet and manufacturing method thereof

Номер: US20130273392A1
Автор: Nobuhiro Fujita, Toshiki Nonaka, Toshio Ogawa
Принадлежит: Nippon Steel and Sumitomo Metal Corp

A hot-dip galvanized steel sheet includes a steel sheet and a hot-dip galvanized layer arranged on the steel sheet, in which the Si content and the Al content by mass % of components of the steel sheet satisfy a relationship 0.5<Si+Al<1.0, and a metallographic structure of the steel sheet satisfies a relationship of {(n 2 ) 2/3 ×d 2 }/{(n 1 ) 2/3 ×d 1 }×ln(H 2 /H 1 )<0.3 when the n 1 is the number of a MnS of a surface portion of the steel sheet, the d 1 μm is an average equivalent circle diameter of the MnS in the surface portion of the steel sheet, the H 1 GPa is a hardness of a martensite of the surface portion of the steel sheet, the n 2 is the number of the MnS of a center portion of the steel sheet, the d 2 μm is an average equivalent circle diameter of the MnS in the center portion of the steel sheet, and the H 2 GPa is the hardness of the martensite of the center portion of the steel sheet.

Подробнее
Номер записи: 64
31-10-2013 дата публикации

Spring having excellent corrosion fatigue strength

Номер: US20130285299A1
Автор: Masami Wakita, Takanori Kuno
Принадлежит: Chuo Hatsujo KK

A spring has a Rockwell hardness of HRC 53 to HRC 56 and a dislocation density ρ (cm −2 ) that satisfies the formula ρ≧1.4×10 11 ×H−6.7×10 12 in the Rockwell hardness range of HRC 53 to HRC 56, in which H is the Rockwell hardness. The spring also has a prior austenite grain size number of 10 or higher.

Подробнее
Номер записи: 65
28-11-2013 дата публикации

Bulk nano-structured low carbon steel and method of manufacturing the same

Номер: US20130312480A1
Автор: Jiaqing Yu, Ke Lu, Lixin Sun, Matthias Kuntz, Nairong Tao
Принадлежит: ROBERT BOSCH GMBH

A method of manufacturing bulk nano-structured low carbon steel includes: preparing a blank of bulk low carbon steel; impacting the blank of bulk low carbon steel by using a compression device, so as to force the blank of bulk low carbon steel to perform a deformation at a high strain rate normally in a range of 10 2 -10 3 /s, so that the microstructure of the blank of bulk low carbon steel is nano-structured, that is, bulk nano-structured low carbon steel is thus manufactured. The bulk nano-structured low carbon steel is a plate having a thickness of not less than 5 mm or a bar having a diameter of not less than 5 mm.

Подробнее
Номер записи: 66
19-12-2013 дата публикации

Conveyor belt link having wear resistant portion

Номер: US20130334015A1
Автор: Jonathan R. Lasecki
Принадлежит: Ashworth Bros Inc

A conveyor belt configured to contact a drive surface is disclosed including a substantially U-shaped link having an outermost portion with a contact surface configured to face the drive surface. The outermost portion of the link may be more resistant to wear due to contact with the drive surface than other portions of the link.

Подробнее
Номер записи: 67
26-12-2013 дата публикации

Material with high resistance to wear

Номер: US20130343944A1
Автор: Devrim Caliskanoglu, Gert Kellezi
Принадлежит: Boehler Edelstahl GmbH and Co KG

Material and method for the production of material with isotropic, mechanical properties and improved wear resistance and high hardness potential. Method includes producing in a powder metallurgical (PM) method a slug or ingot from a material of ledeburite tool steel alloy, and subjecting one of the slug or ingot or a semi-finished product produced from the slug or ingot to full annealing at a temperature of over 1100° C., but at least 10° C. below the fusing temperature of the lowest melting structure phase with a duration of over 12 hrs. In this manner, an average carbide phase size of the material is increased by at least 65%, a surface shape of the material is rounded and a matrix is homogenized. Method further includes subsequently processing the material into thermally tempered tools with high wear resistance occurs or into parts to which abrasive stress is applied.

Подробнее
Номер записи: 68
09-01-2014 дата публикации

Method for Producing a Hot-Rolled Flat Steel Product

Номер: US20140007992A1
Автор: Evgeny BALICHEV, Harald Hofmann, Jian Bian
Принадлежит: THYSSENKRUPP STEEL EUROPE AG

A method for generating a flat steel product comprising the steps of: melting a steel melt, comprising, in addition to Fe and unavoidable impurities (in wt %) C: 0.5-1.3%, Mn: 18-26%, Al: 5.9-11.5%, Si: <1%, Cr: <8%, Ni: <3%, Mo: <2%, N: <0.1%, B: <0.1%, Cu: <5%, Nb: <1%, Ti: <1%, V: <1%, Ca: <0.05%, Zr: <0.1%, P: <0.04%, S: <0.04%; casting the steel melt into a cast strip; heating the cast strip to an initial hot-rolling temperature of 1100-1300° C. at a heating rate of at least 20 K/s; hot rolling the cast strip into a hot strip; cooling the hot strip within 10 seconds after the hot rolling at a cooling rate of at least 100 K/s to <400° C.; and winding the cooled hot strip into a coil at a coiling temperature of up to 400° C.

Подробнее
Номер записи: 69
23-01-2014 дата публикации

Ferritic stainless steel sheet excellent in heat resistance and workability and method of production of same

Номер: US20140023550A1
Автор: Junichi Hamada, Norihiro Kanno, Yoshiharu Inoue
Принадлежит: Individual

The present invention provides ferritic stainless steel sheet which is excellent in heat resistance at 950° C. and workability at ordinary temperature, that is, ferritic stainless steel sheet excellent in heat resistance and workability which is characterized by containing, by mass %, C: 0.02% or less, N: 0.02% or less, Si: over 0.1 to 1.0%, Mn: 0.5% or less, P: 0.020 to 0.10%, Cr: 13.0 to 20.0%, Nb: 0.5 to 1.0%, Cu: 1.0 to 3.0%, Mo: 1.5 to 3.5%, W: 2.0% or less, B: 0.0001 to 0.0010%, and Al: 0.01 to 1.0% and having a balance of Fe and unavoidable impurities, where Mo+W is made 2.0 to 3.5%.

Подробнее
Номер записи: 70
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.

Подробнее
Номер записи: 71
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.

Подробнее
Номер записи: 72
20-02-2014 дата публикации

Method of producing textured surfaces

Номер: US20140047959A1
Автор: Christopher Javellana Saldana, James Bradley Mann, Srinivasan Chandrasekar, Walter Dale Compton, Yang Guo
Принадлежит: PURDUE RESEARCH FOUNDATION

Methods suitable for producing textured surfaces in surfaces of objects, by which the methods are able to achieve a desired three-dimensional surface topography and optionally a desired subsurface microstructure through the use of a controlled modulation machining technique. The methods include selecting a predetermined surface texture for a surface of a body, and then imposing a superimposed sinusoidal feed-modulation on a cutting tool so as to move the cutting tool in a feed direction relative to the body while machining the body with the cutting tool and generating a machined surface of the body. The surface texture of the machined surface is intentionally controlled by at least the modulation amplitude and the modulation frequency of the superimposed sinusoidal feed-modulation.

Подробнее
Номер записи: 73
27-02-2014 дата публикации

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

Номер: US20140056753A1
Автор: Junya Naitou, Keisuke Okita, Shushi Ikeda, Toshio Murakami
Принадлежит: Kobe Steel Ltd

There is provided a hot press-formed product, including a steel sheet formed by a hot press-forming method, and having a metallic structure that contains ferrite at 30% to 80% by area, bainitic ferrite at lower than 30% by area (not including 0% by area), martensite at 30% by area or lower (not including 0% by area), and retained austenite at 3% to 20% by area, whereby balance between strength and elongation can be controlled in a proper range and high ductility can be achieved.

Подробнее
Номер записи: 74
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.

Подробнее
Номер записи: 75
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 ...

Подробнее
Номер записи: 76
01-01-2015 дата публикации

HIGH-STRENGTH STEEL SHEET WITH EXCELLENT WARM FORMABILITY AND PROCESS FOR MANUFACTURING SAME

Номер: US20150000796A1
Автор: Asai Tatsuya, Hata Hideo, KAJIHARA Katsura, Kakiuchi Elijah, MIZUTA Naoki, Murakami Toshio
Принадлежит: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

This high-strength steel sheet contains, in mass %, 0.05 to 0.3% of C, 1 to 3% of Si, 0.5 to 3% of Mn, up to 0.1% (inclusive of 0%) of P, up to 0.01% (inclusive of 0%) of S, 0.001 to 0.1% of Al and 0.002 to 0.03% of N with the balance consisting of iron and unavoidable impurities, and has a microstructure which comprises, in area fraction relative to the microstructure, 40 to 85% of bainitic ferrite, 5 to 20% of retained austenite (γ), 10 to 50% (in total) of martensite and γ, and 5 to 40% of ferrite. The retained austenite (γ) has a C concentration of 0.5 to 1.0 mass %, while the quantity of γpresent in the ferrite grains is 1% or more (in area fraction) relative to the microstructure. 1. A high-strength steel sheet comprising iron and , in mass % ,C: from 0.05% to 0.3%,Si: from 1 to 3%,Mn: from 0.5% to 3%,P: from 0 to 0.1%,S: from 0 to 0.01%,Al: from 0.001% to 0.1% andN: from 0.002% to 0.03%,and having a microstructure which comprises:bainitic.ferrite: from 40 to 85%,retained austenite: from 5 to 20%,martensite+retained austenite: from 10 to 50%, andferrite: from 5 to 40%in terms of an area fraction relative to the total microstructure area, and{'sub': 'R', 'the retained austenite having from 0.5 to 1.0 mass % of a C concentration (Cγ), and the retained austenite comprises ferrite grains of 1% or more in terms of the area fraction relative to the total microstructure.'}2. The high-strength steel sheet according to claim 1 , further comprising one or more ofCr: from 0.01% to 3%.Mo: from 0.01 to 1%,Cu: from 0.01 to 2%.Ni: from 0.01 to 2%,B: from 0.00001 to 0.01%Ca: from 0.0005 to 0.01%,Mg: from 0.0005 to 0.01%, andREM: from 0.0001 to 0.01%.4. The method according to wherein the steel further comprises one or more ofCr: from 0.01% to 3%.Mo: from 0.01 to 1%,Cu: from 0.01 to 2%.Ni: from 0.01 to 2%,B: from 0.00001 to 0.01%Ca: from 0.0005 to 0.01%,Mg: from 0.0005 to 0.01%, andREM: from 0.0001 to 0.01%.5. The high-strength steel sheet according to claim 1 , wherein the ...

Подробнее
Номер записи: 77
01-01-2015 дата публикации

Cold-Rolled Flat Steel Product and Method for its Production

Номер: US20150000797A1
Автор: Ebest Sigrun, Follner Stefan, Mattissen Dorothea, Sebald Roland
Принадлежит: THYSSENKRUPP STEEL EUROPE AG

The invention relates to a cold-rolled flat steel product which, despite high strength values, has a high level of deformability characterised by a high elongation at break and a good hole expansion ratio A. For this purpose the flat steel product is produced from a steel that is composed of (in % by weight) C: 0.12-0.19%, Mn: 1.5-2.5%, Si: >0.60-1.0%, Al: ≦0.1%, Cr: 0.2-0.6%, Ti: 0.05-0.15% with the remainder being iron and unavoidable impurities caused by the production process, and which comprises a perlite- and bainite-free structure having 4-20% by vol. martensite, 2-15% by vol. residual austenite, remainder ferrite, an elongation at break A80 of at least 15%, a tensile strength Rm of at least 880 MPa, a yield strength ReL of at least 550 MPa and a hole expansion ratio λof more than 6%. The invention also relates to a method which easily enables production of a flat steel product according to the invention. 1. Cold-rolled flat steel product , whichis produced from a steel that is composed of (in % by weight)C: 0.12-0.19%,Mn: 1.5-2.5%,Si: >0.60-1.0%Al: ≦0.1%,Cr: 0.2-0.6%,Ti: 0.05-0.15%with the remainder being iron and unavoidable impurities caused by the production process, and which comprisesa perlite- and bainite-free structure having 4-20% by vol. martensite, 2-15% by vol. residual austenite, remainder ferrite,an elongation at break A80 of at least 15%,a tensile strength Rm of at least 880 MPa,a yield strength ReL of at least 550 MPa and{'sub': 'M', 'a hole expansion ratio λof more than 6%.'}2. Cold-rolled flat steel product according to claim 1 , characterised in that its Si content is at least 0.65% by weight.3. Cold-rolled flat steel product according to claim 1 , characterised in that its Ti content is at least 0.07% by weight.4. Method for producing a cold-rolled flat steel product created according to claim 1 , comprising the following steps:casting a steel melt which is composed of (in % by weight)C: 0.12-0.19%,Mn: 1.5-2.5%,Si: >0.60-1.0%Al: ≦0.1%,Cr: ...

Подробнее
Номер записи: 78
06-01-2022 дата публикации

METHOD FOR MODIFYING THE DIMENSIONS OF A CAST IRON PUMP PART

Номер: US20220001447A1
Автор: FERREYRA TELLO Everaldo
Принадлежит:

A method for modifying a dimension of a cast iron pump part features placing a cast iron pump part on a base plate of a directed energy deposition (DED) machine; selecting a metal deposition procedure for depositing a metal having a combination of one or more Nickel Alloys or Nickel powders on the cast iron pump part; and depositing the metal on the cast iron pump part to modify the dimension of the cast iron pump part, based upon the metal deposition procedure selected. The selecting of the metal deposition procedure includes forming the metal by mixing metal powders that include a Nickel Alloy “A” in a specified mixed ratio with a pure Nickel powder “B” for depositing on the cast iron pump part. 120-. (canceled)21. A cast iron pump component/part made or manufactured using steps in a method for modifying a dimension of a cast iron pump part , comprising steps forplacing a cast iron pump component/part on a base plate of a directed energy deposition (DED) machine;selecting a metal deposition procedure for depositing a metal having a combination of one or more Nickel Alloys or Nickel powders on the cast iron pump component/part; anddepositing the metal on the cast iron pump component/part to modify the dimension of the cast iron pump component/part, based upon the metal deposition procedure selected.22. A cast iron pump component/part according to claim 21 , wherein the selecting of the metal deposition procedure comprises forming the metal by mixing metal powders that include a Nickel Alloy “A” in a specified mixed ratio with a pure Nickel powder “B” for depositing on the cast iron pump part.23. A cast iron pump component/part according to claim 22 , wherein the Nickel Alloy “A” comprises a High Nickel Alloy “A” that includes Inconel 625 or Inconel 718.24. A cast iron pump component/part according to claim 22 , wherein the specified mixed ratio of the Nickel Alloy “A” and the pure Nickel powder “B” includes percentages ranging from 50-75/25-50 claim 22 , including ...

Подробнее
Номер записи: 79
01-01-2015 дата публикации

Hot-press formed product and method for manufacturing same

Номер: US20150000802A1
Автор: Junya Naitou, Keisuke Okita, Shushi Ikeda, Toshio Murakami
Принадлежит: Kobe Steel Ltd

Provided is a hot-press molded article that can achieve a high level of balance between high strength and extension by region and has a region corresponding to an energy absorption site and a shock resistant site within a single molded article without applying a welding method by means of having first region having a metal structure containing both 80-97 area % of martensite and 3-20 area % of residual austenite, the remaining structure comprising no more than 5 area %, and a second region having a metal structure comprising 30-80 area % of ferrite, less than 30 area % (exclusive of 0 area %) of bainitic ferrite, no greater than 30 area % (exclusive of 0 area %) of martensite, and 3-20 area % of residual austenite.

Подробнее
Номер записи: 80
06-01-2022 дата публикации

HOT-ROLLED STEEL SHEET WITH EXCELLENT LOW-TEMPERATURE IMPACT TOUGHNESS AND MANUFACTURING METHOD THEREFOR

Номер: US20220002828A1
Автор: KONG Jung Hyun, LEE Mun-Soo
Принадлежит:

Disclosed are a hot-rolled steel sheet having a thickness of 6 mm or more and an excellent impact property, and a manufacturing method thereof. 1. A hot-rolled steel sheet with excellent low-temperature impact toughness , the hot-rolled steel sheet comprising , in percent (%) by weight of the entire composition , C: more than 0 and 0.03% or less , Si: 0.1 to 1.0% , Mn: more than 0 and 2.0% or less , P: 0.04% or less , Cr: 1.0 to 10% , Ni: more than 0 and 1.5% or less , Ti: 0.01 to 0.5% , Cu: more than 0 and 2.0% or less , N: more than 0 and 0.03% or less , Al: 0.1% or less , the remainder of iron (Fe) and other inevitable impurities ,a value of the following Formula (1) satisfies 200 to 1,150, and {'br': None, '1001.5*C+1150.6*Mn+2000*Ni+395.6*Cu−0.7*Si−1.0*Ti−45*Cr−1.0*P−1.0*Al+1020.5*N\u2003\u2003(1)'}, 'a microstructure of the cross-section perpendicular to the rolling direction has an average grain size of 50 μm or less in which a misorientation between grains is 5° or more.'}(Here, C, Mn, Ni, Cu, Si, Ti, Cr, P, Al and N mean the content (% by weight) of each element)2. The hot-rolled steel sheet according to claim 1 , wherein the hot-rolled steel sheet has a thickness of 6.0 to 25.0 mm and −20° C. Charpy impact energy of 100 J/cmor more.3. The hot-rolled steel sheet according to claim 1 , wherein the value of Formula (1) satisfies 200 to 700.4. The hot-rolled steel sheet according to claim 1 , wherein the hot-rolled steel sheet satisfies the following Formula (2).{'br': None, 'Ti/(C+N)≥10.0\u2003\u2003(2)'}5. The hot-rolled steel sheet according to claim 1 , wherein the microstructure has an average grain size of 70 μm or less in which a misorientation between grains is 15 to 180°.6. The hot-rolled steel sheet according to claim 1 , wherein the microstructure has an average grain size of 50 μm or less in which a misorientation between grains is 5 to 180°.7. The hot-rolled steel sheet according to claim 1 , wherein the microstructure has an average grain size of ...

Подробнее
Номер записи: 81
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', ' ...

Подробнее
Номер записи: 82
06-01-2022 дата публикации

LOW-YIELD-RATIO ULTRA-HIGH-STRENGTH HIGH-TOUGHNESS STEEL FOR PRESSURE HULLS AND PREPARATION METHOD THEREFOR

Номер: US20220002849A1
Автор: KAN Liye, Tian Yong, WANG Qinghai, Wang Yimin, WANG Zhaodong, YE Qibin, ZHOU Cheng
Принадлежит:

The present invention discloses a low-yield-ratio ultra-high-strength high-toughness steel for pressure hulls and a preparation method therefor, wherein the chemical components by weight percentage are: 0.05%-0.10% of C, 0.15%-0.35% of Si, 0.60%-1.00% of Mn, 0.10%-0.50% of Cu, 0.10%-1.00% of Mo, 0.40%-0.70% of Cr, 0.05%-0.15% of V, 5.00%-10.00% of Ni, and the balance of Fe and unavoidable impurities. The technical solution of the present invention adopts secondary quenching heat treatment, the first quenching is performed to achieve complete austenitizing, and then the second quenching and tempering are performed to finally obtain complex phase structures such as tempered martensite, critical ferrite and retained austenite, so as to meet the performance index requirements of low yield ratio, ultra-high strength and high toughness, and thereby promoting application in practice. 1. A preparation method for a low-yield-ratio ultra-high-strength high-toughness steel for pressure hulls , comprising the following steps:step 1, meltingmelting to obtain a casting blank using the following chemical components by weight percentage: 0.05%-0.10% of C, 0.15%-0.35% of Si, 0.60%-1.00% of Mn, 0.10%-0.50% of Cu, 0.10%-1.00% of Mo, 0.40%-0.70% of Cr, 0.05%-0.15% of V, 5.00%-10.00% of Ni, and the balance of Fe and unavoidable impurities.step 2, hot rollingkeeping the casting blank obtained in step 1 at 1150° C.-1220° C. for soaking, and then performing hot rolling; the hot rolling adopts a two-stage rolling process; the rolling temperature of the first stage is 1150° C.-1000° C., and the reduction is ≥50%; the rolling temperature of the second stage is 900° C.-750° C., and the reduction is ≥50%; the final rolling thickness is 5-80 mm; and air cooling a high-temperature steel plate after the hot rolling to room temperature;step 3, heat treatmentheating a sample of the hot-rolled steel plate in step 2 to 790° C.-810° C., soaking for 20-40 minutes, and water quenching to room temperature ...

Подробнее
Номер записи: 83
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 ...

Подробнее
Номер записи: 84
07-01-2016 дата публикации

High-toughness low-alloy wear-resistant steel sheet and method of manufacturing the same

Номер: US20160002759A1
Автор: Hongbin Li, Kougen WU, Liandeng Yao, Yuchuan MIAO
Принадлежит: Baoshan Iron and Steel Co Ltd

A high-toughness low-alloy wear-resistant steel sheet and a method of manufacturing the same, which has the chemical compositions (wt %): C: 0.08-0.20%; Si: 0.10-0.60%; Mn: 1.00-2.00%; B: 0.0005-0.0040%; Cr: less than or equal to 1.50%; Mo: less than or equal to 0.80%; Ni: less than or equal to 1.50%; Nb: less than or equal to 0.080%; V: less than or equal to 0.080%; Ti: less than or equal to 0.060%; Al: 0.010-0.080%, Ca: 0.0010-0.0080%, N: less than or equal to 0.0080%, 0: less than or equal to 0.0080%, H: less than or equal to 0.0004%, P: less than or equal to 0.015%, S: less than or equal to 0.010%, and (Cr/5+Mn/6+50B): more than or equal to 0.20% and less than or equal to 0.55%; (Mo/3+Ni/5+2Nb): more than or equal to 0.02% and less than or equal to 0.45%; (Al+Ti): more than or equal to 0.01% and less than or equal to 0.13%, the remainders being Fe and unavoidable impurities. The present invention reduces the contents of carbon and alloy elements, and makes full use of the characteristics of refinement, strengthening, etc. of micro-alloy elements such as Nb, Ti, etc., and through TMCP process, the wear-resistant steel sheet has high strength, high hardness, good toughness, good weldability, excellent wear-resistant performance, and is applicable to wearing parts in various mechanical equipments.

Подробнее
Номер записи: 85
05-01-2017 дата публикации

ULTRAHIGH-STRENGTH STEEL FOR WELDING STRUCTURE WITH EXCELLENT TOUGHNESS IN WELDING HEAT-AFFECTED ZONES THEREOF, AND METHOD FOR MANUFACTURING SAME

Номер: US20170002435A1
Автор: JEONG Hong-Chul, KIM Ho-Soo
Принадлежит:

Provided is a ultrahigh strength steel for a welded structure having superior toughness in a weld heat-affected zone (HAZ) comprising: by wt %, carbon (C): 0.05% to 0.15%, silicon (Si): 0.1% to 0.6%, manganese (Mn): 1.5% to 3.0%, nickel (Ni): 0.1% to 0.5%, molybdenum (Mo): 0.1% to 0.5%, chromium (Cr): 0.1% to 1.0%, copper (Cu): 0.1% to 0.4%, titanium (Ti): 0.005% to 0.1%, niobium (Nb): 0.01% to 0.03%, boron (B): 0.0003% to 0.004%, aluminum (Al): 0.005% to 0.1%, nitrogen (N): 0.001% to 0.006%, phosphorus (P): 0.015% or less, sulfur (S): 0.015% or less, iron (Fe) as a residual component thereof, and inevitable impurities. 1. A ultrahigh strength steel for a welded structure having superior toughness in a weld heat-affected zone (HAZ) comprising:by wt %, carbon (C): 0.05% to 0.15%, silicon (Si): 0.1% to 0.6%, manganese (Mn): 1.5% to 3.0%, nickel (Ni): 0.1% to 0.5%, molybdenum (Mo): 0.1% to 0.5%, chromium (Cr): 0.1% to 1.0%, copper (Cu): 0.1% to 0.4%, titanium (Ti): 0.005% to 0.1%, niobium (Nb): 0.01% to 0.03%, boron (B): 0.0003% to 0.004%, aluminum (Al): 0.005% to 0.1%, nitrogen (N): 0.001% to 0.006%, phosphorus (P): 0.015% or less, sulfur (S): 0.015% or less, iron (Fe) as a residual component thereof, and inevitable impurities,wherein the Ti and N component contents satisfy Formula 1 below, the N and B component contents satisfy Formula 2 below, and the Mn, Cr, Mo, Ni, and Nb component contents satisfy Formula 3 below; and [{'br': None, '3.5≦Ti/N≦7.0 \u2003\u2003[Formula 1]'}, {'br': None, '1.5≦N/B≦4.0 \u2003\u2003[Formula 2]'}, {'br': None, '4.0 2≦Mn+Cr+Mo+Ni+3Nb≦7.0 \u2003\u2003[Formula 3]'}], 'a microstructure including, by area fraction, acicular ferrite in an amount of 30% to 40% and bainite in an amount of 60% to 70%,'}wherein in the Formulas 1 to 3, respective component units are wt %.2. The ultrahigh strength steel for a welded structure having superior toughness in a weld HAZ of claim 1 , wherein the steel further comprises claim 1 , by wt % claim 1 , one or ...

Подробнее
Номер записи: 86
05-01-2017 дата публикации

FERRITIC LIGHTWEIGHT STEEL SHEET HAVING EXCELLENT STRENGTH AND DUCTILITY AND METHOD FOR MANUFACTURING THE SAME

Номер: US20170002436A1
Автор: Kim Han Soo, KIM Nack Joon, KOO Min Seo, SON Chang Young, ZARGARAN Alireza
Принадлежит:

A ferritic steel sheet according to an exemplary embodiment of the present invention includes C at 0.01 to 0.3 wt %, Mn at 0.5 to 8 wt %, Al at 5 to 12 wt %, and Nb at 0.015 to 0.2 wt % based on an entire composition of 100 wt %, and a remaining part of Fe and an impurity. 1. A ferritic steel sheet including C at 0.01 to 0.3 wt % , Mn at 0.5 to 8 wt % , Al at 5 to 12 wt % , and Nb at 0.015 to 0.2 wt % based on an entire composition of 100 wt % , and a remaining part of Fe and an impurity ,wherein an average grain size of a ferrite crystal existing in the steel sheet is 30 μm or less.2. The ferritic steel sheet of claim 1 , wherein:the average grain size of the ferrite crystal is 15 μm or less.3. The ferritic steel sheet of claim 1 , wherein:the ferritic steel sheet includes Si at 0.04 to 2.0 wt %, Cr at 2.0 wt % or less (0% is not included), Mo at 1.0 wt % or less (0% is not included), Ni at 1.0 wt % or less (0% is not included), Ti at 0.1 wt % or less (0% is not included), V at 0.2 wt % or less (0% is not included), B at 0.01 wt % or less (0% is not included), Zr at 0.2 wt % or less (0% is not included), or a combination thereof based on the entire composition of 100 wt %.4. The ferritic steel sheet of claim 1 , wherein:a κ-carbide of a spherical shape, an oval shape, an acicular shape, or a band shape existing inside the ferritic steel sheet is included.5. The ferritic steel sheet of claim 4 , wherein:the κ-carbide at 1 to 10 vol % is included based on the entire 100 vol % of the steel sheet.6. The ferritic steel sheet of claim 4 , wherein:a particle size of the κ-carbide is in a range of 20 nm to 10 μm, and{'sup': 3', '6', '2, 'the κ-carbide is present in the range of 5×10to 1×10particles per unit area (mm).'}7. The ferritic steel sheet of claim 1 , wherein:a NbC compound existing inside the ferritic steel sheet is included.8. The ferritic steel sheet of claim 7 , wherein:the NbC compound at 0.1 to 1 vol % is included based on the entire 100 vol % of the steel ...

Подробнее
Номер записи: 87
05-01-2017 дата публикации

CONTINUOUS PROCESSING LINE FOR PROCESSING A NON-MAGNETIC METAL STRIP INCLUDING A GALVANNEALING SECTION AND METHOD FOR INDUCTION HEATING OF SAID STRIP IN SAID GALVANNEALING SECTION

Номер: US20170002438A1
Автор: PATARD Emmanuel
Принадлежит:

Disclosed is a continuous processing line for processing a non-magnetic metal strip and specifically to an induction heating apparatus and method intended for heating the non-magnetic metal strip travelling through the continuous processing line, including a coating section , the apparatus being installed downstream from the coating section in the direction of travel of the strip, the apparatus making it possible to raise the temperature of the strip across the entire width thereof to the level required to obtain the sought development of the coating thereof, the heating apparatus including at least one cross-flow inductor 1120201415. A continuous processing line for processing a nonmagnetic metal strip () , the processing line comprising a coating section () and a galvannealing section placed downstream of the coating section () and comprising an induction heating apparatus () intended to heat said nonmagnetic metal strip , characterized in that the heating apparatus comprises at least one transverse flux inductor ().21819. The processing line as claimed in claim 1 , comprising screens () which can be moved laterally over the strip width so as to influence the transverse temperature profile of the strip claim 1 , characterized in that adjustment of the position of the screens makes it possible to regulate overheating of the edges () of the strip.318. The processing line as claimed in claim 2 , characterized in that the screens () can be moved transversely in order to adjust their spacing with respect to the strip.41516. The processing line as claimed in claim 1 , characterized in that the transverse flux inductor () comprises at least two pairs of coils ().512015. A method for induction heating of a nonmagnetic metal strip () in a galvannealing section of a continuous processing line for processing said nonmagnetic metal strip claim 1 , said processing line comprising a coating section () claim 1 , the galvannealing section being placed downstream of the coating ...

Подробнее
Номер записи: 88
05-01-2017 дата публикации

METHOD FOR OPTIMALLY PRODUCING METAL STEEL AND IRON ALLOYS IN HOT-ROLLED AND THICK PLATE FACTORIES USING A MICROSTRUCTURE SIMULATOR, MONITOR, AND/OR MODEL

Номер: US20170002440A1
Автор: Hassell Christoph, SPROCK August
Принадлежит: SMS group GmbH

In a method for controlling a metallurgical production plant by means of a microstructure model, which comprises a program which calculates at least one mechanical strength property of a product being produced, which program calculates the strength property on the basis of calculated metallurgical phase components of the microstructure of the produced product, wherein the metallurgical plant comprises a terminating cooling line, and wherein operating parameters for the metallurgical plant with adjustable output values, which are established at least partially in advance, are factored into the calculation of the mechanical strength property, the object of the method is to enable an advantageous adjustment of operating parameters in order to achieve desired mechanical strength properties in a product consisting of a metal steel and/or iron alloy. This object is achieved in that, as the operating parameters that are factored into the calculation of the strength property, the mass fraction of at least one alloy element that is present in the chemical composition of the metal steel and/or iron alloy being used, and at least one additional operating parameter, preferably a cooling rate which is set as part of a cooling process carried out after a rolling process, are detected, and an increase in the strength property in question of the produced product, said increase being achieved by modifying at least said additional operating parameter, is at least partially compensated for by reducing the mass fraction of one or more of the alloying elements of the metal steel and/or iron alloy being used. 14-. (canceled)5. The method according to claim 14 , characterized in that the program comprises a mathematical term and/or algorithm for expressing the impact of mass fractions of alloying elements in the chemical composition of the metal steel and/or iron alloy being used on the yield strength of the finished product.6. The method according to claim 5 , characterized in that the ...

Подробнее
Номер записи: 89
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.

Подробнее
Номер записи: 90
04-01-2018 дата публикации

HIGH-STRENGTH COLD ROLLED STEEL SHEET WITH LOW MATERIAL NON-UNIFORMITY AND EXCELLENT FORMABILITY, HOT DIPPED GALVANIZED STEEL SHEET, AND MANUFACTURING METHOD THEREFOR

Номер: US20180002771A1
Автор: HAN Sang-Ho, HAN Seong-Ho
Принадлежит:

A high-strength cold-rolled steel sheet and a hot-dipped galvanized steel sheet with low deviation of material properties and excellent formability, and a method for manufacturing same are provided. The present invention relates to a low-yield-ratio high-strength cold-rolled steel sheet with low deviation of directional material and excellent formability, comprising 0.05-0.15 wt % of C, 0.2-1.5 wt % of Si, 2.2-3.0 wt % of Mn, 0.001-0.10 wt % of P, 0.010 wt % or less of S, 0.01-0.10 wt % of sol.Al, 0.010 wt % or less of N, and the balance of Fe and impurities, satisfying Si/(Mn+Si)≦0.5, wherein the microstructure of the steel sheet includes 40% or more of ferrite, 10% or less of bainite, 3% or less of residual austenite, and a balance of martensite, and the area fraction of a Mn band present in the martensite phase is 5% or less. 1. A low-yield-ratio high-strength cold-rolled steel sheet with low deviation of directional material and excellent formability , the cold-rolled steel sheet comprising:by wt %, 0.05 to 0.15% of C, 0.2 to 1.5% of Si, 2.2 to 3.0% of Mn, 0.001 to 0.10% of P, 0.010% or less of S, 0.01 to 0.10% of sol.Al, 0.010% or less of N, and a balance of Fe and impurities, satisfying a condition of Si/(Mn+Si)≦0.5,wherein the cold-rolled steel sheet has a microstructure including 40% or more of ferrite, 10% or less of bainite, 3% or less of retained austenite, and a balance of martensite, and the fraction of a Mn band present within the martensite is 5% or less.2. The cold-rolled steel sheet of claim 1 , wherein each of tensile strength TS(tr.)-TS(lo.) and yield strength YS(tr.)-YS(lo.) is 50 MPa or lower claim 1 , respectively claim 1 , where tr refers to a direction perpendicular to a rolling direction and lo refers to the rolling direction.3. The cold-rolled steel sheet of claim 1 , further comprising at least one of Ti or Nb in an amount of 0.05% or less.4. The cold-rolled steel sheet of claim 1 , further comprising at least one of 0.1 to 0.7% of Cr or 0 ...

Подробнее
Номер записи: 91
04-01-2018 дата публикации

GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR

Номер: US20180002772A1
Автор: Han Kyu-Seok, JOO Hyung Don, KO Hyun-Seok, PARK Jong-Tae, SEO Jin-Wook
Принадлежит:

A method for manufacturing a grain-oriented electrical steel sheet, according to an embodiment of the present invention includes: heating a slab, based on 100 wt % of a total composition thereof, including N at 0.0005 wt % to 0.015 wt %, Ti at 0.0001 wt % to 0.020 wt %, V at 0.0001 wt % to 0.020 wt %, Nb at 0.0001 wt % to 0.020 wt %, B at 0.0001 wt % to 0.020 wt %, and the remaining portion including Fe and other impurities, and then hot rolling it to prepare a hot-rolled steel sheet; annealing the hot-rolled steel sheet; after the hot-rolled steel sheet is annealed, cooling the hot-rolled steel sheet, and then cold rolling it to prepare a cold-rolled steel sheet; decarburization-annealing the cold-rolled steel sheet and then nitriding-annealing it, or simultaneously performing the decarburization-annealing and the nitriding-annealing; and final-annealing the decarburization-annealed and nitriding-annealed steel sheet. 1. A manufacturing method of a grain-oriented electrical steel sheet , comprising:heating a slab, based on 100 wt % of a total composition thereof, including N at 0.0005 wt % to 0.015 wt %, Ti at 0.0001 wt % to 0.020 wt %, V at 0.0001 wt % to 0.020 wt %, Nb at 0.0001 wt % to 0.020 wt %, B at 0.0001 wt % to 0.020 wt %, and the remaining portion including Fe and other impurities, and then hot rolling it to prepare a hot-rolled steel sheet;annealing the hot-rolled steel sheet;after the hot-rolled steel sheet is annealed, cooling the hot-rolled steel sheet, and then cold rolling it to prepare a cold-rolled steel sheet;decarburization-annealing the cold-rolled steel sheet and then nitriding-annealing it, or simultaneously performing the decarburization-annealing and the nitriding-annealing; andfinal-annealing the decarburization-annealed and nitriding-annealed steel sheet,wherein the annealing of the hot-rolled steel sheet includes heating the steel sheet, primary-soaking the heated steel sheet, cooling the primary-soaked steel sheet and then secondary- ...

Подробнее
Номер записи: 92
04-01-2018 дата публикации

Non-oriented electrical steel sheet and method for manufacturing thereof

Номер: US20180002776A1
Автор: Ichiro Tanaka, Satoshi Kano, Takeaki Wakisaka
Принадлежит: Nippon Steel and Sumitomo Metal Corp

A non-oriented electrical steel sheet includes C: 0 to 0.0050 mass %, Si: 0.50 to 2.70 mass %, Mn: 0.10 to 3.00 mass %, Al: 1.00 to 2.70 mass %, and P: 0.050 to 0.100 mass %. In the non-oriented electrical steel sheet, Al/(Si+Al+0.5×Mn) is 0.50 to 0.83, Si+Al/2+Mn/4+5×P is 1.28 to 3.90, Si+Al+0.5×Mn is 4.0 to 7.0, the ratio of the intensity of {100} plane I{100} to the intensity of {111} plane I{111} is 0.50 to 1.40, the specific resistance is 60.0×10 −8 Ω·m or higher at room temperature, and the thickness is 0.05 mm to 0.40 mm.

Подробнее
Номер записи: 93
04-01-2018 дата публикации

HIGH-STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

Номер: US20180002778A1
Автор: Funakawa Yoshimasa, Kariya Nobusuke, KAWAMURA Kenji, MORI Kazuma, Ono Yoshihiko, Sugihara Reiko
Принадлежит: JFE STEEL CORPORATION

Provided are a high-strength steel sheet and a method for manufacturing the steel sheet. The high-strength steel sheet has a specified chemical composition with the balance being Fe and inevitable impurities, a microstructure including, in terms of area ratio, 25% or less of a ferrite phase, 75% or more of a bainite phase and/or a martensite phase, and 5% or less of cementite, in which, in a surface layer that is a region within 50 μm from the surface in the thickness direction, the area ratio of a ferrite phase is 5% to 20%, and a tensile strength is 1180 MPa or more. 1. A high-strength steel sheet havinga chemical composition containing, by mass %, C: 0.100% to 0.150%, Si: 0.30% to 0.70%, Mn: 2.20% to 2.80%, P: 0.025% or less, S: 0.0020% or less, Al: 0.020% to 0.060%, N: 0.0050% or less, Nb: 0.010% to 0.060%, Ti: 0.010% to 0.030%, B: 0.0005% to 0.0030%, Sb: 0.005% to 0.015%, Ca: 0.0015% or less, and the balance being Fe and inevitable impurities,a microstructure including, in terms of area ratio, 25% or less of a ferrite phase, 75% or more of a bainite phase and/or a martensite phase, and 5% or less of cementite,wherein, in a surface layer that is a region within 50 μm from the surface in the thickness direction, the area ratio of a ferrite phase is 5% to 20%, anda tensile strength being 1180 MPa or more.2. The high-strength steel sheet according to claim 1 , wherein the chemical composition further contains at least one element selected from at least one group consisting of claim 1 , by mass % claim 1 ,Group I: one or more elements selected from Cr: 0.30% or less V: 0.10% or less Mo: 0.20% or less, Cu: 0.10% or less, and Ni: 0.10% or less, andGroup II: REM: 0.0010% to 0.0050%.3. The high-strength steel sheet according to claim 1 , the steel sheet further having a YR of 0.85 or less.4. The high-strength steel sheet according to claim 2 , the steel sheet further having a YR of 0.85 or less.5. A method for manufacturing a high-strength steel sheet having a tensile ...

Подробнее
Номер записи: 94
04-01-2018 дата публикации

HIGH STRENGTH GALVANIZED STEEL SHEET HAVING EXCELLENT SURFACE QUALITIES, PLATING ADHESION, AND FORMABILITY, AND METHOD FOR MANUFACTURING SAME

Номер: US20180002790A1
Автор: KANG Ki-Cheol, Kim Jong-ho, Kim Myung-Soo
Принадлежит: POSCO

A high strength galvanized steel sheet having excellent surface qualities, plating adhesion, and formability is provided, wherein a galvanized layer is formed on a cold-rolled steel sheet comprising 0.1-0.3 wt % of C, 1-2.5 wt % of Si, 2.5-8 wt % of Mn, 0.001-0.5 wt % of sol. Al, at most 0.04 wt % of P, at most 0.015 wt % of S, at most 0.02 wt % of N (excluding 0 wt %), 0.1-0.7 wt % of Cr, at most 0.1 wt % of Mo, (48/14)*[N] to 0.1 wt % of Ti, 0.005-0.5 wt % of Ni, 0.01-0.07 wt % of Sb, at most 0.1 wt % of Nb, and at most 0.005 wt % of B, with the remainder being Fe and other inevitable impurities. 1. A high strength galvanized steel sheet having excellent surface qualities , plating adhesion , and formability ,wherein a galvanized layer is formed on a cold-rolled steel sheet comprising 0.1-0.3 wt % of C, 1-2.5 wt % of Si, 2.5-8 wt % of Mn, 0.001-0.5 wt % of sol. Al, 0.04 wt % or less of P, 0.015 wt % or less of S, 0.02 wt % or less of N (excluding 0 wt %), 0.1-0.7 wt % of Cr, 0.1 wt % or less of Mo, (48/14)*[N] to 0.1 wt % of Ti, 0.005-0.5 wt % of Ni, 0.01-0.07 wt % of Sb, 0.1 wt % or less of Nb, and 0.005 wt % or less of B, with the remainder being Fe and other inevitable impurities, and the average content of Sb in the galvanized layer from the surface of the cold-rolled steel sheet to a depth of 0.1 μm is at least 1.5 times that at a depth of 0.5 μm or more from the surface of the cold-rolled steel sheet.2. The high strength galvanized steel sheet of claim 1 , wherein a microstructure of the cold-rolled steel sheet comprises residual austenite in an area fraction of 5-25%.3. The high strength galvanized steel sheet of claim 1 , wherein the cold-rolled steel sheet has a tensile strength of 1 claim 1 ,000 MPa or higher claim 1 , and a value of tensile strength (MPa)×elongation (%) is 15 claim 1 ,000 or higher.4. A method for a high strength galvanized steel sheet having excellent surface qualities claim 1 , plating adhesion claim 1 , and formability claim 1 , the ...

Подробнее
Номер записи: 95
02-01-2020 дата публикации

HOT-ROLLED FERRITIC STAINLESS STEEL SHEET AND METHOD FOR MANUFACTURING SAME

Номер: US20200002779A1
Автор: Fujisawa Mitsuyuki, Yoshino Masataka
Принадлежит: JFE STEEL CORPORATION

Provided is a hot-rolled ferritic stainless steel sheet which has sufficient corrosion resistance and which can prevent the occurrence of cracking when subjected to blanking to be formed into a thick flange, and also provided is a method for manufacturing the hot-rolled ferritic stainless steel sheet. A hot-rolled ferritic stainless steel sheet having a chemical composition containing, in mass %, C: 0.001 to 0.020%, Si: 0.05 to 1.00%, Mn: 0.05 to 1.00%, P: 0.04% or less, S: 0.01% or less, Al: 0.001 to 0.50%, N: 0.001 to 0.020%, Cr: 11.0 to 24.0%, Ni: 0.01 to 2.00%, and Nb: 0.12 to 0.80%, with the balance being Fe and incidental impurities, wherein the hot-rolled ferritic stainless steel sheet has a threshold stress intensity factor Kof 25 MPa·mor more. 1. A hot-rolled ferritic stainless steel sheet having a chemical composition comprising , in mass % ,C: 0.001 to 0.020%,Si: 0.05 to 1.00%,Mn: 0.05 to 1.00%,P: 0.04% or less,S: 0.01% or less,Al: 0.001 to 0.50%,N: 0.001 to 0.020%,Cr: 11.0 to 24.0%,Ni: 0.01 to 2.00%, andNb: 0.12 to 0.80%, with a balance of Fe and incidental impurities,{'sub': 'IC', 'sup': '1/2', 'wherein the hot-rolled ferritic stainless steel sheet has a threshold stress intensity factor Kof 25 MPa·mor more.'}2. A hot-rolled ferritic stainless steel sheet having a chemical composition comprising , in mass % ,C: 0.001 to 0.020%,Si: 0.05 to 1.00%,Mn: 0.05 to 1.00%,P: 0.04% or less,S: 0.01% or less,Al: 0.001 to 0.50%,N: 0.001 to 0.020%,Cr: 13.0 to 24.0%,Ni: 0.01 to 0.60%, andNb: 0.12 to 0.80%, with a balance of Fe and incidental impurities,{'sub': 'IC', 'sup': '1/2', 'wherein the hot-rolled ferritic stainless steel sheet has a threshold stress intensity factor Kof 25 MPa·mor more.'}3. The hot-rolled ferritic stainless steel sheet according to claim 1 , wherein the chemical composition further comprises claim 1 , in mass % claim 1 , one or more selected fromCu: 0.01 to 1.50%,Mo: 0.01 to 2.00%,W: 0.01 to 0.20%, andCo: 0.01 to 0.20%.4. The hot-rolled ferritic ...

Подробнее
Номер записи: 96
02-01-2020 дата публикации

FERRITIC STAINLESS STEEL SHEET, HOT COIL, AND AUTOMOBILE EXHAUST FLANGE MEMBER

Номер: US20200002793A1
Автор: NISHIMURA Akihiro, TAMURA Shinichi, TERAOKA Shinichi
Принадлежит: NIPPON STEEL CORPORATION

A ferritic stainless steel plate having a sheet thickness t of 5.0 to 12.0 mm, including a chemical composition consisting of, in mass percent, C: 0.001 to 0.010%, Si: 0.01 to 1.0%, Mn: 0.01 to 1.0%, P: 0.04% or less, S: 0.010% or less, Cr: 10.0 to 20.0%, Ni: 0.01 to 1.0%, Ti: 0.10 to 0.30%, V: 0.01 to 0.40%, Al: 0.005 to 0.3%, N: 0.001 to 0.02%, and as necessary, one or more of B, Mo, Cu, Mg, Sn, Sb, Zr, Ta, Nb, Hf, W, Co, Ca, REM, and Ga, with the balance being Fe and unavoidable impurities, wherein in a steel micro-structure, on a cross section parallel to a rolling direction, an area ratio of structures each satisfying: major grain diameter/minor grain diameter being 5.0 or more is 90% or more, and an average minor grain diameter of the structures is 100 μm or less. The ferritic stainless steel is excellent in toughness and suitable for an automobile exhaust flange member and the like. 1. A ferritic stainless steel sheet having a sheet thickness t of 5.0 to 12.0 mm , comprisinga chemical composition consisting of, in mass percent:C: 0.001 to 0.010%;Si: 0.01 to 1.0%;Mn: 0.01 to 1.0%;P: 0.04% or less;S: 0.010% or less;Cr: 10.0 to 20.0%;Ni: 0.01 to 1.0%;Ti: 0.10 to 0.30%;V: 0.01 to 0.40%;Al: 0.005 to 0.3%;N: 0.001 to 0.02%;B: 0 to 0.0030%;Mo: 0 to 2.0%;Cu: 0 to 0.3%;Mg: 0 to 0.0030%;Sn: 0 to 0.1%;Sb: 0 to 0.1%;Zr: 0 to 0.1%;Ta: 0 to 0.1%;Nb: 0 to 0.1%;Hf: 0 to 0.1%;W: 0 to 0.1%;Co: 0 to 0.2%;Ca: 0 to 0.0030%;REM: 0 to 0.05%; andGa: 0 to 0.1%,with the balance being Fe and unavoidable impurities, whereinin a steel micro-structure, on a cross section parallel to a rolling direction, an area ratio of structures each satisfying: major grain diameter/minor grain diameter being 5.0 or more is 90% or more, and an average minor grain diameter of the structures is 100 μm or less.2. A hot coil made of the ferritic stainless steel sheet according to .3. An automobile exhaust flange member made of the ferritic stainless steel sheet according to .4. An automobile exhaust flange ...

Подробнее
Номер записи: 97
02-01-2020 дата публикации

MULTI-LAYERED ZINC ALLOY PLATED STEEL HAVING EXCELLENT SPOT WELDABILITY AND CORROSION RESISTANCE

Номер: US20200002803A1
Автор: Eom Mun-Jong, HONG Seok-Jun, Jung Yong-Hwa, KIM Goo-Hwa, Kim Tae-Yeob, KO Kyoung-Pil, Kwak Young-Jin, Lee Dong-Yoeul, Nam Kyung-Hoon
Принадлежит:

Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24. 1. A multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material ,wherein the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24, andeach of the multiple plating layers comprises at least one of a Zn single phase, a Mg single phase, and a Zn—Mg alloy phase, and has a phase structure different from phase structures of adjacent plating layers.2. (canceled)3. The multilayer zinc alloy plated steel material of claim 1 , wherein when a GDS profile is measured at a thicknesswise center portion of each of the multiple plating layers claim 1 , a Mg content deviates within a range of ±5%.4. The multilayer zinc alloy plated steel material of claim 1 , wherein grains of the multiple plating layers have an average diameter within a range of 100 nm or less (excluding 0 nm).5. The multilayer zinc alloy plated steel material of claim 1 , wherein the sum of plating amounts of the multiple plating layers is within a range of 40 g/mor less (excluding 0 g/m).6. (canceled)7. The multilayer zinc alloy plated steel material of claim 1 , wherein when spot welding is performed on the multilayer zinc alloy plated steel material claim 1 , the multiple plating layers are changed to a single alloy layer in a weld zone claim 1 , and the single alloy layer in the weld zone comprises a MgZnalloy phase in an area fraction of 90% or greater (including 100%).8. The multilayer zinc alloy plated steel material ...

Подробнее
Номер записи: 98
01-01-2015 дата публикации

STEEL SHEET, PLATED STEEL SHEET, AND METHOD FOR PRODUCING THE SAME

Номер: US20150004433A1
Автор: Goto Koichi, Hayashi Kunio, Nakano Kazuaki, Ogawa Toshio, Tanaka Hiroyuki
Принадлежит:

A steel sheet includes, by mass %: C: 0.020% to 0.080%; Si: 0.01% to 0.10%; Mn: 0.80% to 1.80%; and Al: more than 0.10% and less than 0.40%; and further includes: Nb: 0.005% to 0.095%; and Ti: 0.005% to 0.095%, in which a total amount of Nb and Ti is 0.030% to 0.100%, and the steel sheet includes, as a metallographic structure, ferrite, bainite, and other phases, an area fraction of the ferrite is 80% to 95%, an area fraction of the bainite is 5% to 20%, a total fraction of the other phases is less than 3%, a tensile strength is 590 MPa or more, and a fatigue strength ratio as a fatigue strength to the tensile strength is 0.45 or more. 1. A steel sheet comprising , by mass %:C, 0.020% or more and 0.080% or less;Si: 0.01% or more and 0.10% or less;Mn: 0.80% or more and 1.80% or less;Al: more than 0.10% and less than 0.40%;Mo: 0% or more and 1.000% or less;W: 0% or more and 1.000% or less;V: 0% or more and 1.000% or less;B: 0% or more and 0.0100% or less;Ni: 0% or more and 1.50% or less;Cu: 0% or more and 1.50% or less;Cr: 0% or more and 1.50% or less;P: limited to 0.0100% or less;S: limited to 0.0150% or less;N: limited to 0.0100% or less;Nb: 0.005% or more and 0.095% or less;Ti: 0.005% or more and 0.095% or less; anda balance consisting of Fe and unavoidable impurities, whereina total amount of Nb and Ti is 0.030% or more and 0.100% or less,a metallographic structure of the steel sheet includes ferrite, bainite, and other phases,the other phases include a pearlite, a residual austenite, and a martensite,an area fraction of the ferrite is 80% or more and 95% or less,an area fraction of the bainite is 5% or more and 20% or less,a total fraction of the other phases is less than 3%,an equivalent circle diameter of a cementite in the ferrite is 0.003 μm or more and 0.300 μm or less,{'sup': 2', '2, 'a number density of the cementite in the ferrite is 0.02 particles/μmor more and 0.10 particles/μmor less,'}a tensile strength is 590 MPa or more, anda fatigue strength ratio ...

Подробнее
Номер записи: 99
07-01-2021 дата публикации

COATING LIQUID FOR FORMING INSULATION COATING FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, METHOD OF MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Номер: US20210002738A1
Автор: Fujii Hiroyasu, NAGAI Toru, Takeda Kazutoshi, Yamazaki Shuichi
Принадлежит: NIPPON STEEL CORPORATION

In the present invention, there is provided a coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet, including: a solvent; and one or two more layered clay mineral powders having a specific surface area of 20 m/g or more. In addition, in the present invention, there is provided a grain-oriented electrical steel sheet including: a base metal; and an insulation coating provided on a surface of the base metal, in which the insulation coating contains SiO, and one or two of AlOand MgO, and has a porosity of 10% or less. 110-. (canceled)11. A coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet , comprising:a solvent; and{'sup': '2', 'one or two or more layered clay mineral powders having a specific surface area of 20 m/g or more.'}12. The coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet according to claim 11 ,{'sup': '2', 'wherein the specific surface area of the layered clay mineral powder is 150 m/g or less.'}13. The coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet according to claim 11 ,wherein the layered clay mineral powder is one or two or more powders selected from kaolin, talc, and pyrophyllite.14. The coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet according to claim 12 ,wherein the layered clay mineral powder is one or two or more powders selected from kaolin, talc, and pyrophyllite.15. The coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet according to claim 11 , further comprising:an inorganic dispersant in an amount more than 0 mass % and equal to or less than 20 mass % with respect to the layered clay mineral powder.16. The coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet according to claim 12 , further comprising:an inorganic dispersant in an amount more than 0 ...

Подробнее
Номер записи: 100