СПОСОБ УПРАВЛЕНИЯ ДЛЯ РАСПОЛОЖЕННОЙ ПЕРЕД УЧАСТКОМ ОХЛАЖДЕНИЯ ЧИСТОВОЙ ЛИНИИ КЛЕТЕЙ ДЛЯ ПРОКАТКИ ГОРЯЧЕКАТАНОЙ МЕТАЛЛИЧЕСКОЙ ПОЛОСЫ

Изобретение относится к прокатному производству. Технический результат - повышение качества обработки полосы. Согласно способу самое позднее при входе горячекатаной полосы в чистовую линию клетей регистрируют начальные температуры точек полосы. Точки полосы прослеживают на пути через линию. Горячекатаную полосу подвергают в чистовой линии клетей температурным воздействиям. Точки полосы, начальные температуры, прослеживания пути и температурные воздействия подводят к модели для чистовой линии клетей. Моделью для чистовой линии клетей определяют ожидаемые в реальном масштабе времени действительные температуры точек полосы и присваивают их им в качестве новых действительных температур. 2 н. и 13 з.п. ф-лы, 5 ил.

ТЕХНОЛОГИЧЕСКАЯ ЛИНИЯ МНОГОЦЕЛЕВОЙ ПЕРЕРАБОТКИ ДЛЯ ТЕРМИЧЕСКОЙ ОБРАБОТКИ И НАНЕСЕНИЯ ПОКРЫТИЯ В РЕЗУЛЬТАТЕ ПОГРУЖЕНИЯ В РАСПЛАВ ДЛЯ СТАЛЬНОЙ ПОЛОСЫ

Технологическая линия многоцелевой непрерывной переработки, способная обеспечивать проведение термической обработки и нанесение покрытия в результате погружения в расплав для стальной полосы, включающая: секцию отжига (1) для нагревания стальной полосы до предварительно определенной температуры отжига и для выдерживания стальной полосы при упомянутой температуре отжига, первую секцию перемещения (2), секцию перестаривания (3), способную обеспечивать выдерживание температуры стальной полосы в диапазоне от 300°С до 700°С, вторую секцию перемещения (4), способную обеспечивать подстраивание температуры стальной полосы для достижения возможности нанесения покрытия в результате погружения в расплав для полосы, и секцию нанесения покрытия в результате погружения в расплав (5), где первая секция перемещения (2) включает в последовательности средства охлаждения (21) и средства нагревания (22). 9 з.п. ф-лы, 2 ил.

ВЕРТИКАЛЬНАЯ ПЕЧЬ ДЛЯ НЕПРЕРЫВНОЙ ТЕРМИЧЕСКОЙ ОБРАБОТКИ МЕТАЛЛИЧЕСКОЙ ПОЛОСЫ

Изобретение относится к области термической обработки. Вертикальная печь (1) для непрерывной термической обработки металлической полосы (2), содержащая входную зону (3) для металлической полосы (2), зону (4) нагрева/выдержки с камерой отжига для нагревания и выдерживания при соответствующей температуре металлической полосы (2), первую зону (5) охлаждения для охлаждения металлической полосы (2), размещенное после первой зоны (5) охлаждения поворотное устройство (6) для поворота металлической полосы (2) по направлению к выходной зоне (8) для металлической полосы (2). Причем после поворотного устройства (6) по направлению продвижения размещена вторая зона (9) охлаждения, при этом зона (4) нагрева/выдержки и первая зона (5) охлаждения окружены восходящей ветвью (17). А восходящая ветвь (17) и включающая вторую зону (9) охлаждения нисходящая ветвь (18) соединены друг с другом поворотным устройством (6). Первая зона (5) охлаждения сформирована как зона радиационного охлаждения для металлической ...

УСТРОЙСТВО И СПОСОБ ОХЛАЖДЕНИЯ МЕТАЛЛИЧЕСКИХ ПОЛОС

Изобретение относится к устройству и способу охлаждения металлических полос в роликовом закалочном оборудовании линии тепловой обработки, которое предусматривает использование оборудования для охлаждения газовой струей, в котором две или более насадок сопел расположены по направлению оси охлаждающих роликов через металлическую полосу, ширина насадок сопел будет меньше ширины металлической полосы, а сами насадки сопел установлены с возможностью перемещения вдоль направления движения охлаждающих роликов, и как минимум одна из насадок сопел может перемещаться вдоль оси ролика, использование устройства регулирования газа, предназначенное для регулирования давления или скорости потока охлаждающего газа, поступающего в каждую насадку. В зависимости от подобной конструкции насадки сопел узкой ширины перемещаются непосредственно над горячими точками, обычно имеющими форму буквы W и небольшой размер по ширине неравномерного распределения температуры, а охлаждающий газ нагнетается в эти горячие точки ...

СИСТЕМА РЕЦИРКУЛЯЦИИ ВОССТАНОВИТЕЛЬНОГО ГАЗА ДЛЯ ПЕЧИ НЕПРЕРЫВНОГО ОТЖИГА БЕЗ ТРАВЛЕНИЯ И СПОСОБ ЕЁ ПРИМЕНЕНИЯ

СПОСОБ И УСТРОЙСТВО ДЛЯ НЕПРЕРЫВНОГО ФОРМИРОВАНИЯ БЕЙНИТНОЙ СТРУКТУРЫ В УГЛЕРОДИСТОЙ СТАЛИ, ПРЕЖДЕ ВСЕГО В ПОЛОСОВОЙ СТАЛИ

... 1. Способ непрерывного формирования бейнитной структуры в углеродистой стали (1), прежде всего в полосовой стали, включающий в себя аустенитизацию (3) углеродистой стали (1) при температуре, превышающей температуру аустенитизации, введение аустенитизированной углеродистой стали (1) в ванну (2) с закалочной средой (21) для охлаждения углеродистой стали (1) до температуры, меньшей температуры аустенитизации, доведение углеродистой стали (1) до температуры бейнитного превращения и выдерживание (13) углеродистой стали (1) в течение определенного времени при этой температуре превращения с последующим охлаждением (17) углеродистой стали, ! отличающийся тем, что ! после аустенитизации (3) углеродистую сталь (1) пропускают через ванну (2) с небольшим по объему количеством закалочной среды (21), при этом сталь держат в контакте с закалочной средой (21) до тех пор, пока в общей структуре углеродистой стали (1), находящейся в ванне (2) с закалочной средой (21), не образуется задаваемая доля бейнитной ...

СПОСОБ И УСТАНОВКА ДЛЯ ОХЛАЖДЕНИЯ МЕТАЛЛИЧЕСКОЙ ЛЕНТЫ ПРИ ЕЕ ПРОТЯГИВАНИИ

... 1. Способ охлаждение металлической ленты при ее протягивании, при котором непрерывно перемещают охлаждаемую металлическую ленту (2), ленту (2) размещают на главном охлаждающем валке (10), установленном с возможностью вращения вокруг своей оси (Х-Х) таким образом, чтобы она образовала дугу, внутренняя поверхность которой вместе с наружной поверхностью главного охлаждающего валка создает контактную зону, предназначенную для отвода части тепла ленты внутрь этого валка, и поддерживают контакт между лентой (2) и главным охлаждающим валком (10) с помощью, по меньшей мере, одного прижимного валка (14) для воздействия на наружную поверхность дуги ленты, при этом прижимный валок расположен по существу параллельно главному охлаждающему валку (10) и установлен с возможностью вращения вокруг своей оси (Z-Z), отличающийся тем, что прижимный валок (14) выполнен, по меньшей мере, по своей периферии из упруго деформируемого и теплоемкого материала и что тепло, поступившее с ленты (2) на прижимный валок ...

Герметизирующее устройство проходной установки для обработки листа

Способ ускоренного охлаждения плоского проката (его варианты)

Изобретение относитс  к области охлаждени  плоского проката. Цель изобретени  - повьппение качества проката за счет снижени  его деформации при охлаждении. Способ заключаетс  в том, что охлаждают изделие 1 смесью жидкостей, имеющей температуру Т и содержащей по меньшей мере одну испар ющуюс  жидкость. Модулируют охлаждение в направлении, перпендикул рном направлению перемещени  издели  1. В результате получают различные скорости охлаждени  между кра ми и осью и двум  кра ми издели  1. Способ позвол ет обеспечить быстрое охлаждение и свести до минимума при этом деформацию плоского проката. 2 с.п. и 4 з.п. ф-лы, 8 ил. фиг. 2 САЭ. ;р :л /г 5 I 8 ГО 5 2 см The invention relates to the field of cooling flat products. The purpose of the invention is to improve the quality of rolled products by reducing its deformation during cooling. The method consists in cooling the article 1 with a mixture of liquids having a temperature T and containing at least one evaporating liquid. Cooling is modulated in the direction perpendicular to the direction of movement of the product 1. As a result, different cooling rates between the edges and the axis and the two edges of the product 1 are obtained. The method allows for rapid cooling and minimizes the deformation of flat rolled products. 2 sec. and 4 hp f-ly, 8 ill. FIG. 2 SAE. ; r: l / g 5 I 8 GO 5 2 cm

Vorrichtung und Verfahren zur kontinuierlichen Behandlung eines Metallbandes

Vorrichtung zur kontinuierlichen Behandlung eines Metallbandes (1), mit zumindest einer Temperiervorrichtung, welche als Bandschwebeofen (2) ausgebildet ist, durch den das Metallband (1) schwebend hindurchgeführt wird und mit einer Bandlageregeleinrichtung (7), mit der die Lage des Metallbandes (1) in der Bandlaufebene und quer zur Bandlaufrichtung steuerbar oder regelbar ist, wobei der Bandschwebeofen (2) zumindest eine einlaufseitige Heizstrecke (3) und eine auslaufseitige Kühlstrecke (4) aufweist, dadurch gekennzeichnet, dass die Bandlageregeleinrichtung (7) innerhalb der Kühlstrecke (4) angeordnet ist.

Draht-Weichglühvorrichtungen und Draht-Weichglühverfahren

Ziel ist, die Streuung der Quetschstärke zwischen Drähten und Kabelschuhen zu begrenzen. Eine Weichglühvorrichtung umfasst ein Kühlflüssigkeitsreservoir, das mit einer Kühlflüssigkeit befüllbar ist, eine außerhalb des Kühlflüssigkeitsreservoirs angeordneten, ersten leitfähigen Rolle zum Anlegen einer Spannung an den Draht während sie den Draht führt, und eine im Kühlflüssigkeitsreservoir angeordnete, zweite leitfähige Rolle zum Durchströmen des Drahts mit Strom, während sie den Draht, der über die erste leitfähige Rolle zugeführt wird, führt. Die Weichglühvorrichtung umfasst des Weiteren einen Füllstandsdetektor zum Erfassen des Füllstandes der Kühlflüssigkeit im Kühlflüssigkeitsreservoir. Eine Glühpfadlänge des Drahtes zwischen der ersten leitfähigen Rolle und der zweiten leitfähigen Rolle wird basierend auf einem Ergebnis der Erfassung mit dem Füllstandsdetektor geregelt.

Primärkühlverfahren für das kontinuierliche Glühen von Stahlbändern

CONTINUOUS ANNEALING FURNACES

... 1435651 Annealing steel strip NIPPON KOKAN KK 11 Jan 1974 [11 Jan 1973] 01441/74 Heading C7N Steel strip is annealed in a continuous annealing furnace comprising a recrystallization heating zone 5, a rapid cooling zone 6 and 7, a carbon precipitation zone 8 and a final cooling zone 9 such that the rapid cooling zone comprises a gas jet cooling zone 6 and a water quench zone 7. The furnace may also comprise means by which the strip may pass either through the water quench zone or parallel to the water quench zone thereby bypassing the water quench zone. The strip, which may be of thickness 0.6 mm. or more, may be cleaned at 3, heated to 710‹C at 5, gas quenched to 500-600‹C using a hydrogen-nitrogen mixture and water quenched to noon temperature at 6, pickled, neutralized, rinsed and dried, held for more than 30 seconds at 400 to 500‹C at 8, finally cooled to room temperature at 9, subjected to a 1% reduction in temper mill 11 and coiled at 12. Alternatively when the strip is of less than ...

METHOD AND APPARATUS FOR WATER QUENCHING METAL STRIPS

... 1324980 Continuously quenching strip NIPPON KOKAN KK 2 July 1971 [3 July 1970] 31232/71 Headings C7A and C7N Strip is quenched to below 500‹C. by jetting on to substantially the whole of both sides of it water in sheet form at an impact pressure of at least 15 cm. of water, at a location where the strip is not immersed in water. Suitable apparatus includes a pair of nozzle plates spaced more than 40 mm apart, and between which the strip passes, the plates having transverse slits at a spacing not greater than that of the plates. The process forms part of a continuous annealing sequence in which steel strip is heated to 700-800‹C., quenched to less than 500‹C. at 500-2000‹C. per second, maintained at 400-500‹C. for 15-60 seconds and forced air cooled. As illustrated the apparatus consists of degreasing tank 3, looping tower 5 and pit 6, heating zone 7, soaking zone 8, quench unit 9, reheating zone 13, soaking zone 14 and looping tower 16. The quench unit includes seal rolls 19 and jetting ...

METHOD OF AND APPARATUS FOR COOLING ROLLED MATERIAL

... 1,219,013. Automatic temperature control. KLOCKNER-WERKE A.G. March 7, 1968 [March 8, 1967], No.11266/68. Heading G3R. Temperature detectors, insensitive to ambient temperature changes and responsive to the temperature of travelling rolled material at the entry and exit of a cooling zone are maintained in linear regions of their characteristics to control the rate of cooling and thus maintain a desired exit temperature. As shown, photo-electric cells 1 and 2, responsive to the temperature of rolled wire 8 at the entry and exit of a cooling zone, produce signals which are caused to have a linear relationship with temperature by a servo-operated potentiometer 3 which adjusts the range of operation of the photocells. These signals operate through a controller 4, thyristor unit 6, and a step by step motor 7, to adjust a valve in the coolant supply so that the wire temperature at the cooling zone exit is maintained at a desired value selected by a unit 5 the range of operation of which is also ...

ANLAGE ZUR WÄRMEBEHANDLUNG VON METALLISCHEM GLÜHGUT

PATENTIERANLAGE MIT IN ZIRKULATION GEHALTENER METALLSCHMELZE

DEVICE FOR COOLING A METAL BAND

GAS-CUSHION-TYPE STRIP-SUPPORTING SYSTEM HAVING A NOZZLE SYSTEM

Die vorliegende Erfindung betrifft ein Düsensystem (100) für eine Bandschwebeanlage (300) zum schwebenden Führen eines bandförmigen Materials (101). Ein Düsenkörper (102), welcher entlang einer Förderrichtung (103) des bandförmigen Materials (101), welches innerhalb einer Bandlaufebene beförderbar ist, weist einen vorderen Randbereich (104) und einen, gegenüber diesem liegenden hinteren Randbereich (105) auf. Eine vordere Gasdüsenanordnung (110) ist an dem vorderen Randbereich (104) derart angeordnet, dass ein vorderer Gasstrahl (111) in Richtung der Bandlaufebene zum Bilden eines Schwebedüsenfelds (106) für das bandförmige Material (101) strömbar ist. Eine hintere Gasdüsenanordnung (120) ist an dem hinteren Randbereich (105) derart angeordnet, dass ein hinterer Gasstrahl (121) in Richtung der Bandlaufebene zum Bilden des Schwebedüsenfelds (106) für das bandförmige Material (101) strömbar ist. Eine Düsenanordnung (130) ist in Förderrichtung (103) vor der vorderen Gasdüsenanordnung (110) ...

PROCEDURE FOR THE COOLING OF DUENNEN METAL BANDS.

DEVICE FOR THE DIFFERENTIATED COOLING OF BROAD FLAT PRODUCTS

COOLING SYSTEM FOR COOLING A MOVED METAL BAND.

DEVICE FOR THE CIRCULATION AND COOLING OF THE GAS IN CONTINUOUS BELT KILNS.

SAFETY SYSTEM FOR A FURNACE WITH GASKÜHLUNG FOR METAL BAND

PLANT AND PROCEDURE FOR THE AVOIDANCE OF VOLUME VIBRATIONS IN THE GAS INJECTING ZONES IN PARTICULAR IN THE COOLING ZONES

DEVICE TO THE HEAT EXCHANGE WITH FLATTENING PRODUCT

PROCEDURE FOR PRODUCING A HOT-ROLLED STRIP

DEVICE FOR COOLING WORK MATERIAL

Method for making a continuous steel strip

A method of dynamical adjustment for manufacturing a thermally treated steel sheet

The present invention relates to a method of dynamical adjustment for manufacturing a thermally treated steel sheet.

FINAL COOLING OF STEEL STRIP IN HEAT TREATING LINE

FINAL COOLING OF STEEL STRIP WITH JETS IN TANK

Method and apparatus for micro-treating iron-based alloy, and the material resulting therefrom

Method and device for blowing gas on a running strip

The invention relates to a method for acting on the temperature of a running strip (4), by blowing a gas or a water-gas mixture, wherein said method comprises ejecting, on each surface of the strip, a plurality of jets of said gas or water-gas mixture extending towards the surface of the strip and arranged such that the impacts (24, 34) of the jets of said gas or water-gas mixture on each surface of the strip are distributed at the nodes of a two-dimensional network. The impacts (24) of the jets on a surface (A) are not directly opposite the impacts (34) of the jets on the other surface (B), and the jets of said gas or water-gas mixture are generated by tubular nozzles (22, 23) supplied by at least one distribution casing (21, 31) and extending at a distance from the distribution casing in order to leave a free gap for the flow of the returning gas or water-gas mixture, in parallel to the longitudinal direction of the strip and perpendicularly to the longitudinal direction of the strip.

method and system for cooling strip material

APPARATUS FOR COOLING A TRAVELING STRIP

GAS-LIQUID COOLING APPARATUS

CONTINUOUS HEAT TREATMENT PLANT FOR STEEL SHEET

ELECTRICAL TRANSFORMER ASSEMBLY

A support frame for an electrical transformer assembly, comprising two loop-shaped parts, each loop-shaped part having a plurality of limbs, each limb having a peripheral recessed portion in which a primary electrical coil is mountable, and at least one secondary coil is mountable in piggyback on the primary electrical coil, one limb of each loop-shaped part having a straight section. The frame also includes an adjustable attaching means for attaching one of the loop-shaped parts with respect to the other loop-shaped part and adjusting a distance therebetween, so that only the straight sections are adjacent and form a central leg, the central leg being for receiving a magnetic core distinct from the attaching means. The frame provides a means and a method to efficiently secure adjacent windings in a circular core transformer kernel.

METHOD OF CONTROLLING THE TEMPERATURE OF STEEL STRIP IN THE COOLING ZONE OF A CONTINUOUS ANNEALING FURNACE

A method of controlling the temperature of a steel strip in the cooling zone of a continuous annealing furnace which is provided with a plurality of cooling rolls in which a coolant is circulated for cooling the strip as it is brought into contact with the outer peripheral surfaces of the rolls, and a plurality of gas jet coolers for blowing cooling gas against the strip. The flow rate of the cooling gas, the angle at which the strip is brought into contact with the surfaces of the rolls and the coolant temperature are controlled selectively in the order of first at least one of the flow rate and the angle and then the coolant temperature so that the strip may be cooled to a predetermined temperature irrespective of any change in strip gauge during the continuous annealing of a plurality of strips which are different in gauge.

METHOD AND APPARATUS FOR COOLING STEEL STRIP

In a cooling zone of a continuous annealing line engineered to continuously process lognitudinally travelling steel strip, the strip is first slowly cooled to a desired temperature at a rate of not higher than 20.degree.C/sec by means of a jet stream of cooling gas ejected against the surface of the strip and subsequently quenched to a desired temperature at a rate of not lower than 70.degree.C/sec. Thinner strip is quenched by high-speed gas-jet cooling that is effected by ejecting a jet stream of cooling gas against its surface, while heavier strip is quenched by bringing it into contact with the perimeter of cooling rolls cooled by a coolant. Namely, quenching is achieved either by high-speed gasjet cooling or roll cooling depending on the thickness of the strip being processed. A cooling apparatus for implementing the cooling method described above comprises a high-speed gas-jet cooling zone where the strip is cooled by means of a jet stream of cooling gas ejected against its surface ...

METHOD AND APPARATUS FOR WATER QUENCHING METAL STRIPS

METHOD AND APPARATUS FOR COOLING A METAL STRIP IN A CONTINUOUS ANNEALING FURNACE

METHOD AND APPARATUS FOR COOLING A METAL STRIP IN A CONTINUOUS ANNEALING FURNACE The present invention relates to a method and apparatus for cooling a steel strip in a continuous annealing furnace, wherein the steel strip is continuously conveyed through a heating zone, a soaking zone, a primary cooling zone and, occasionally, an overaging zone and a secondary cooling zone, and cooling of the steel strip is carried out by roll-cooling, in which the steel strip is brought into contact with and is turned around a rotatable roll which is continuously cooled by a cooling medium. The present invention is characterized in that a roll comprising a roll shaft (12) and a shrinkage-fitted roll sheath (11) fixed to the roll shaft (12) is used for roll-cooling and, further, in that the cooling medium is circulated around the roll shaft through a cooling medium-circulating passage (15) which is formed on at least the inner surface of said roll sheath or the outer surface of said roll shaft (12) or both ...

CONTINUOUS GOLD ROLLING AND ANNEALING APPARATUS FOR STEEL STRIP

CONTINUOUS COLD ROLLING AND ANNEALING APPARATUS FOR STEEL STRIP A continuous cold rolling and annealing apparatus for a steel strip so that interruption of a cold rolling mill part does not directly cause a continuous annealing furnace part to be interrupted, in which apparatus at least one cold rolling mill is located upstream of the entrance of a continuous annealing furnace and an intermediate reel for supplying a spare steel strip coil to said continuous annealing furnace, is arranged between the cold rolling mill and the continuous annealing furnace.

METHOD OF CONTROLLED COOLING FOR STEEL STRIP

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

METHOD OF CONTROLLING METAL STRIP TEMPERATURE

The recoiling temperature of a metal strip from a continuous heat treatment line is controlled by continuously passing the metal strip through an accumulator system where it passes around spaced accumulator rolls. While travelling through the accumulator, the metal strip is subjected to ambient cooling air and the length of aluminum strip travelling through the accumulator determines the amount of cooling that takes place. The length of the metal strip in the accumulator is in turn controlled by varying spacing between the accumulator rolls around which the metal strip travels. The spacing is preferably controlled by a programmed controller in response to temperature signals.

SYSTEMS AND METHODS FOR QUENCHING A METAL STRIP AFTER ROLLING

Systems and methods of quenching a metal substrate include cooling a top surface and a bottom surface of the metal substrate until a strip temperature is cooled to an intermediate temperature. Cooling of the top surface of the metal substrate is discontinued when the strip temperature reaches the intermediate temperature, and cooling of the bottom surface of the metal substrate continues until the metal substrate reaches a target temperature, where the target temperature is less than the intermediate temperature.

A METHOD FOR MANUFACTURING A THERMALLY TREATED STEEL SHEET

The present invention relates to a method for manufacturing a thermally treated steel sheet.

A METHOD OF DYNAMICAL ADJUSTMENT FOR MANUFACTURING A THERMALLY TREATED STEEL SHEET

The present invention relates to a method of dynamical adjustment for manufacturing a thermally treated steel sheet.

METHODS OF COOLING AN ELECTRICALLY CONDUCTIVE SHEET DURING TRANSVERSE FLUX INDUCTION HEAT TREATMENT

The present invention, in some embodiments, is a method the includes obtaining a sheet of a non-ferrous alloys as feedstock having a first edge and a second edge, heating the feedstock using a transverse flux induction heating system to form a heat treated product and concomitant with the heating step, cooling at least one of the first edge and the second edge of the feedstock by cross-flowing at least one fluid across the at least one of the first edge and the second edge of the feedstock.

COOLING DEVICE FOR STEEL STRIP

The present invention: enables the resistance coefficient of a nozzle to be decreased and a cooling device assembly to be downsized in a cooling device requiring a higher cooling rate; in particular, the invention is a cooling device for a steel strip, said cooling device being equipped with a plurality of nozzles protruding from the surfaces of a cooling chamber so as to keep the distance between the tips of said nozzles and the surfaces of said steel strip in the range from 30 to 100 mm and cooling said traveling steel strip by ejecting a cooling medium through said nozzles, characterized in that D/d of said blowing nozzles satisfies the expression 1.5 ( D/d ( 3.0 wherein d is the inner diameter at the tip of a nozzle (steel strip side) and D the inner diameter at the foot of a nozzle (cooling chamber side).

METHOD FOR COOLING STEEL STRIP AND COOLING APPARATUS

A method for cooling a steel strip in a galvannealing furnace, which comprises: jetting mist to the steel strip passing through the cooling installation in a manner that an amount of mist jetted to the steel strip passing through the cooling installation is smaller in an edge portion in a width direction of the steel strip than in a center portion; sucking at least part of mist jetted to the steel strip; and cooling the steel strip at a sheet-passing speed such that, during a period between start and end of cooling of the steel strip, a temperature of the steel strip is within a film boiling temperature range and a temperature of the edge portion in the width direction of the steel strip is equal to or higher than a temperature of the center portion in at least a range of 2/3 or more from the upstream side in the sheet-passing direction of a total cooling length of the cooling installation.

METHOD AND DEVICE FOR BLOWING GAS ON A RUNNING STRIP

La présente invention concerne un procédé d'action sur la température d'une bande (4) en défilement par soufflage de gaz ou d'un mélange eau/gaz selon lequel on projette sur chaque face de la bande une pluralité de jets de gaz ou d'un mélange eau/gaz s'étendant en direction de la surface de la bande et disposés de telle sorte que les impacts (24, 34) des jets de gaz ou d'un mélange eau/gaz sur chaque surface de la bande sont répartis aux nuds d'un réseau bi-dimensionnel. Les impacts (24) des jets sur une face (A) ne sont pas en regard des impacts (34) des jets sur l'autre face (B), et les jets de gaz ou d'un mélange eau/gaz sont issus de buses tubulaires (23, 33) alimentées par au moins un caisson de répartition (21, 31 ) et s'étendant à distance du caisson de répartition de façon à laisser libre un espace de circulation du gaz ou du mélange eau/gaz en retour parallèlement au sens longitudinal de la bande et perpendiculairement au sens longitudinal de la bande.

STRIP COOLING APPARATUS FOR CONTINUOUS ANNEALING FURNACE

APPARATUS FOR CONTINUOUSLY COOLING METAL STRIP

METHOD AND PRODUCTION PLANT FOR PRODUCING HOT-ROLLED WIDE STRIP

In a method for the production of hot-rolled wide strip in a production plant which includes a continuous casting plant for thin slabs having a thickness of between 40 and 70 mm, an equalizing furnace and a rolling mill, wherein the temperature of the thin slab when exiting the continuous casting plant is above 950.degree.C, the surface temperature of the slab is lowered between the continuous casting machine and the equalizing furnace over a sufficient depth of the slab, so that a conversion of the structure from austenite to ferrite/perlite takes place.

PROCESS FOR QUENCHING HEAT TREATABLE METAL ALLOYS

The present invention is directed to a process comprised of a controllably variable liquid quenching means for metal alloys at or above the Leidenfrost temperature without metal alloy distortion.

Verfahren und Einrichtung zum kontinuierlichen Abschrecken eines warmen Metallbandes mit einer Abschreckflüssigkeit

Dünnwandiges Stahlprodukt in Blech- oder Bandform und Verfahren zur Herstellung desselben

PROCEDURE AND DEVICE FOR THE PARTIAL REMUNERATION OF WIRE ROD PRODUCTS OF STEEL AND APPLICATION OF THE PROCEDURE.

СПОСОБ И УСТРОЙСТВО ДЛЯ ОХЛАЖДЕНИЯ И СТАБИЛИЗАЦИИ ПОЛОСЫ НА НЕПРЕРЫВНОЙ ЛИНИИ

Изобретение относится к способу охлаждения металлических полос с помощью охлаждающих боксов посредством вдувания газа на линии непрерывной термообработки, в котором боксы (4, 4а ... 4', 4'а ...) имеют одинаковый размер (h) в направлении (X) движения полосы, составляющий менее двух метров, и разделены в направлении, перпендикулярном направлению (X) движения полосы, на множество идентичных продувочных секторов, каждый из которых оборудован по меньшей мере одним датчиком (7) давления продувки и по меньшей мере одним исполнительным механизмом (2) для регулировки давления в каждом из этих идентичных секторов, и система управления/регулировки управляет исполнительными механизмами (2) так, чтобы в теоретическом продольном распределении давления в продувочных секторах, соответствующем заданной кривой охлаждения полосы, учитывалось изменение положения полосы относительно продувочных секторов, осуществленное в целях исключения любого контакта полосы со стенками оборудования в зоне охлаждения, без ...

УСТРОЙСТВО ДЛЯ ОБЕСПЕЧЕНИЯ БЕЗОПАСНОСТИ ПЕЧИ, СНАБЖЕННОЙ СИСТЕМОЙ БЫСТРОГО ОХЛАЖДЕНИЯ И НАГРЕВА, РАБОТАЮЩЕЙ В КОНТРОЛИРУЕМОЙ СРЕДЕ

Устройство для ограничения опасности образования взрывоопасной среды в печи непрерывной линии тепловой обработки металлических лент, участки которой находятся в среде, образованной смесью инертного газа и водорода при объемном содержании водорода от 5 до 100%, снабженной участком быстрого индукционного нагрева и участком быстрого охлаждения, содержит камеру (9) с инертным газом на входе участка быстрого нагрева печи и выходе участка быстрого охлаждения, при этом давление в камере (9) равно или превышает давление среды при нормальном режиме нагрева печи; устройство (10) для входа ленты в камеру (9) из атмосферного воздуха; устройство (11) разделения среды и входа ленты на участок нагрева печи из камеры (9) с инертным газом, при этом устройство (11) снабжено откачкой (14) газа; устройство (13) разделения среды и выхода ленты из участка быстрого охлаждения печи, снабженное средством откачки (14) газа, и устройство (12) выхода ленты из камеры (9) в атмосферный воздух.

СПОСОБ И УСТРОЙСТВО ДЛЯ ПОДАЧИ ГАЗА НА ДВИЖУЩУЮСЯ ПОЛОСУ

Настоящее изобретение относится к способу воздействия на температуру движущейся полосы (4) посредством продувки газа или смеси вода/газ, с помощью которого множество струй газа или смеси вода/газ, продолжающихся в направлении поверхности полосы и расположенных так, что точки (24, 34) ударов струй газа или смеси вода/газ на каждой поверхности полосы распределяются по узлам двухмерной сетки, распыляются на каждой стороне полосы. Точки (24) ударов струй на одной стороне (А) полосы не расположены напротив точек (34) ударов струй на другой стороне (В) полосы, и струи газа или смеси вода/газ поступают из трубчатых сопел (23, 33), в которые подается газ, по меньшей мере, с помощью одной распределительной камеры (21, 31) и которые продолжаются на некотором расстоянии от распределительной камеры, так чтобы обеспечить свободное пространство для потока возвращающегося газа или смеси вода/газ, параллельного продольному направлению полосы и перпендикулярного продольному направлению полосы.

СТАЛЬНАЯ НИТЬ, ПАТЕНТИРОВАННАЯ В ВИСМУТЕ

Нить из углеродистой стали, полученная холодным волочением, имеет поверхность со следами висмута. Стальная нить может использоваться в виде проволоки для проволочной пилы или как часть стального корда. Во время производства стальная нить подвергается контролируемому охлаждению за счет контактирования стальной нити с висмутом. Висмут может заменять свинец, не оказывая отрицательного влияния на окружающую среду.

СПОСОБ РАБОТЫ СЕКЦИИ ОХЛАЖДЕНИЯ С ЦЕНТРАЛИЗОВАННЫМ ОПРЕДЕЛЕНИЕМ ХАРАКТЕРИСТИК КЛАПАНОВ И СООТВЕТСТВУЮЩИЕ ЕМУ ОБЪЕКТЫ

Секция (1) охлаждения имеет большое количество выпускных отверстий (2) для охладителя, с помощью которых в нормальном режиме работы секции (1) охлаждения на прокатываемый материал (3), который проходит через секцию (1) охлаждения, подается охладитель (4). Охладитель (4) подается на выпускные отверстия (2) для охладителя через каналы (5) подачи и магистральный трубопровод (6), общий для каналов (5) подачи. В каналах (5) подачи расположены клапаны (7), которые раздельно открываются и закрываются, так что подача на выпускные отверстия (2) охладителя через каналы (5) подачи может устанавливаться или прерываться. Устройство (8) автоматизации секции (1) охлаждения в нормальном режиме работы секции (1) охлаждения открывает и закрывает клапаны (7) в специфические для клапанов моменты времени открывания и в специфических для клапанов моменты времени закрывания, чтобы на прокатываемый материал (3) подавать охладитель (4) в соответствии с номинальным процессом изменения количества охладителя. Он учитывает ...

СПОСОБ ТЕРМИЧЕСКОЙ ОБРАБОТКИ МЕТАЛЛИЧЕСКОЙ ЛЕНТЫ

Способ термической обработки металлической ленты, содержащий внутри камеры термической обработки пропускание упомянутой ленты через по меньшей мере одну зону нагревания и по меньшей мере одну зону охлаждения и установление некоторой первой атмосферы защитного газа, имеющего в своем составе азот и некоторое первое содержание водорода в камере, за исключением зоны охлаждения, в которой создана некоторая вторая атмосфера защитного газа, имеющего в своем составе азот и некоторое второе содержание водорода, превышающее упомянутое первое содержание, введение азота в камеру, подачу защитного газа, имеющего в своем составе некоторое третье содержание водорода, превышающее упомянутое второе содержание, в упомянутую зону охлаждения, газообмен между некоторой зоной камеры, представляющей упомянутую первую защитную газовую атмосферу, и упомянутой зоной охлаждения и контроль расхода в процессе упомянутого введения и упомянутой подачи газа.

METHOD FOR METAL STRIP HEAT TREATMENT

METHOD FOR PRODUCING A METALLIC COATED STEEL SHEET

METHOD OF HEAT TREATMENT OF METAL BAND

METHOD FOR CONTROLLING A METAL STRIP IN A HEAT TREATMENT FURNACE

Method and apparatus for producing hot rolled wide steel belt

Gas jet cooling device for continuous annealing furnace

Method of transporting and heat treating coils of hot rolled products in a rolling mill

A transport path is defined by a plurality of consecutively arranged separately driven conveyor sections. A plurality of heat treating stations are spaced one from the other along the transport path. Coils are conveyed along the transport path through one or more of the heat treating stations. The speed at which the coils are conveyed on the separately driven conveyor sections is controlled to provide different transport and/or dwell times for the coils at different locations along the transport path.

PLUGGING DEVICE OF the ENDS Of a PROCESSING MACHINE OF SHEETS

CONTINUOUS ANNEALING FURNACE

Cooler forced for continuous furnaces with bands

Proceeded of treatment by the heat of sheets and steel bands intended for the manufacture of cans

Cooling and stabilization of metal strip in a continuous heat treatment line by controlling the pressure in gas blown cooling boxes to provide a given cooling curve along the cooling length

Procédé de refroidissement de bandes métalliques par des caissons de refroidissement par soufflage d'un gaz, dans une ligne de traitement thermique en continu, selon lequel: les caissons (4,4a...4',4'a...) ont une dimension unitaire (h) dans la direction de défilement (X) de la bande inférieure à deux mètres et sont fractionnés suivant la direction perpendiculaire à la direction de défilement (X) de la bande en une pluralité de secteurs de soufflage unitaires ; chaque secteur de soufflage unitaire est équipé d'au moins un capteur (7) de la pression de soufflage et d'au moins un actionneur (2) permettant d'ajuster la pression de chacun de ces secteurs unitaires ; et un système de contrôle et de régulation commande les actionneurs (2) de sorte que la distribution théorique longitudinale de pression dans les secteurs de soufflage correspondant à une courbe de refroidissement de la bande visée est adaptée afin de prendre en compte une modification de la position de la bande par rapport aux ...

CONTINUOUS THERMAL TREATMENT INSTALLATION, FOR BRIGHT ANNEALING A STAINLESS STEEL STRIP

L'invention concerne une installation de traitement thermique en continu, destinée au recuit brillant d'une bande d'acier inoxydable, comprenant au moins une enceinte à atmosphère contrôlée intégrant des moyens de chauffage de la bande et des moyens de refroidissement de la bande, les moyens de chauffage et les moyens de refroidissement de la bande étant constitués respectivement par une section (3) verticale de chauffage rapide à induction et au moins par une section (4) verticale de refroidissement rapide, positionnées sur le brin vertical, montant ou descendant de la bande métallique, sur lesquelles sections (3, 4) la bande est libre de conduite, non touchée, lorsque la température de bande excède 250 °C. Selon l'invention : - ladite enceinte est constituée par ladite chambre à atmosphère contrôlée (2) , non oxydante, dont la teneur est constituée par un mélange de gaz inerte et d'hydrogène voire d'hydrogène pur et par une chambre (5) maintenue sous gaz inerte d'un dispositif de sécurité ...

METHOD AND APPARATUS FOR WATER QUENCHING METAL STRIPS

PROCESS AND APPARATUS TO COOL STEEL BANDS DURING a TREATMENT OF ANNEALING Uninterrupted

COOLER FAST AND CONTROL IN AN ANNEALING FURNACE IN NEUTRAL OR REDUCING ATMOSPHERE

Cooling device for metal plate and continuous heat treatment equipment of metal plate

Section and method for cooling a continuous line combining dry cooling and wet cooling

MANUFACTURING DEVICE AND METHOD OF A THIN STRIP, AND A COOLING ROLL, CAPABLE OF RAPIDLY COOLING A THIN STRIP FROM BOTH SIDES BY COOLING ROLLS

PURPOSE: Manufacturing device and method of a thin strip, and a cooling roll are provided to prevent the non-uniformity of cooling since the linear area of a thin strip making contact with a cooling roll is simultaneously cooled by cooling rolls. CONSTITUTION: A manufacturing device of a thin strip comprises a heating chamber(30), a cooling chamber(40), and cooling rolls(50). The heating chamber heats a thin strip(18) to a temperature of over a re-crystallization point and below a melting point. The thin strip contains precipitation-hardening alloy composition. The cooling chamber is arranged close to the heating chamber. The cooling rolls are installed in the cooling chamber in a pair. The thin strip heated in the heating chamber is inserted into the cooling roll, and the cooling roll cools the thin strip. COPYRIGHT KIPO 2011 ...

Thermal treatment oven [...] automatic control from the atmosphere and cooling process in the oven

process for producing steel strip in a process of pouring [...] steel strip.

METHOD FOR THERMAL TREATMENT OF PLATED MATERIAL AND DEVICE TO CARRY THROUGH THE METHOD

APPARATUS FOR COLD ROLLING AND ANNEALING OF STEEL STRIPS,

METHOD AND DEVICE FOR ADJUSTING THE COOLING AND ENERGY RECOVERY OF A STEEL STRIP IN AN ANNEALING OR GALVANISATION PHASE

The invention relates to a method and a device for adjusting the cooling of a steel strip in an annealing or galvanisation phase. The device is suitable for the forced cooling of a steel strip (B) continuously running in a plant adapted for the continuous annealing or the continuous tempering galvanisation, and comprises: at least one exchange member (51, 5142) for transferring the heat of the steel strip to a cooling water and including an outlet (51422) for the cooling water thus heated up; at least one cooling unit (52) comprising a sealed enclosure (521) connected to the outlet (51422) of the exchange member (5142) and including at least one outlet (5211) to a Venturi effect device such as a vapour outlet ejector (522), and in which the cooling water itself is subjected to a vacuum-vaporisation cooling; and an auxiliary outlet (5213) of the sealed enclosure (521) connected to an inlet (51421) of the exchange member (51, 5142).

COOLING SYSTEM IN CONTINUOUSLY HEAT TREATMENT OF METAL STRIPS

Cooling jets for moving webs such as continuously annealing steel strip can be deflected to aim at the edge of the web, and thereby stabilise it as it passes between. Flutter of the web is thereby reduced. The offset is between 2° and 15°, alternatively 25-75% of the divergence angle of gas leaving the jet.

CONTINUOUS HEAT TREATING FURNACE AND ATMOSPHERE CONTROL METHOD AND COOLING METHOD IN CONTINUOUS HEAT TREATING FURNACE

A continuous heat treating furnace comprising a quenching zone (11) constituting one of a plurality of furnace zones excluding the first and the last zones and adapted to quench materials by blowing an atmospheric gas and, as atmospheric gas sealing means, a roll seal room (3) disposed at an entrance and partitioned by first and second roll seal devices (4A, 4B) arranged in that order from the upstream side and a third roll seal device (4C) disposed at an exit, wherein the entrance of the first roll seal device is connected to the exit of the third roll seal device and/or roll seal rooms are connected to the upstream-most portion (6) of the quenching zone, an in-furnace hydrogen concentration being controlled to not lower than 10 % in the quenching zone and to not higher than 10 % in zones on the entry side of the quenching zone. The above design can provide a continuous heat treating furnace that can prevent by a simple means mixing of an atmospheric gas in the quenching zone using a gas ...

Method for producing a hot-rolled strip

The invention relates to a method for producing hot strip which features good forming ability and increased strength. This is achieved in that a hot strip (W) which is produced in particular from continuous casting in the shape of reheated slabs or slabs obtained directly from the casting heat, from thin slabs or cast strip, based on a steel comprising (in mass %) C: 0.001-1.05%; Si: <=1.5%; Mn: 0.05-3.5%; Al: <=2.5%, if necessary further elements such as Cu, Ni, Mo, N, Ti, Nb, V, Zn, B, P, Cr, Ca and/or S, with the remainder being iron as well as the usual accompanying elements, is continuously finish rolled and subsequently continuously cooled, with cooling taking place in at least two subsequent cooling phases (tCK, tLK) of accelerated cooling, to a final temperature; with the first cooling phase (tCK) of accelerated cooling starting at the latest three seconds after the last pass of finish rolling; and with the hot strip (W) during the first cooling phase (tCK) of accelerated cooling ...

Method for controlling cooling of steel sheet

A method for controlling the cooling of a steel sheet characterized by controlling the end-of-cooling temperature in a cooling process from the Ae3 or above temperature of the steel sheet, during which; preliminarily obtaining enthalpies (H and H) of an austenite phase and ferrite phase respectively at some temperature, obtaining a gynamic enthalpy (Hsys) defined by formula (1) with an untransformed fraction (X) of austenite in accordance with a target temperature pattern, predicting the temperature by using a gradient of this dynamic enthalpy with respect to temperature as a dynamic specific heat and controlling the cooling of the steel sheet: Hsys=H(X)+H(1X).formula (1) ...

Method for cooling a steel strip in a continuous annealing furnace

The present invention relates to a method for cooling a steel strip in a continuous-annealing furnace. Conventionally, the steel strip is cooled by a water medium and, thus, oxidation is inevitable. Recently developed roll cooling methods can prevent oxidation but are disadvantageous in that the steel strip (1) is nonuniformly cooled as seen in its short width direction. The present invention attains uniform cooling by means of feedback-feedforward control, in which the blowing width of the gas-jet cooler (21, 53) is controlled by detecting the sheet temperature distribution with thermometers (24, 55, 60).

ANNEALING INSTALLATION WITH M-SHAPED STRIP TREATMENT TUNNEL

An annealing installation for the continuous annealing of metal strip guided through the installation, includes an entrance chute a first top roller chamber a heating station a cooling station a second top roller chamber and a discharge chute together delimiting an M-shaped meandering tunnel with four legs connected with each other via the two top roller chambers and a lower turning section. The entrance chute extends along the first one of the legs, the heating and the cooling stations extend along the second one of the legs, the lower turning section and the third one of the legs, and the discharge chute extends along the fourth one of the legs. Strip feeding and discharging means are provided for continuously guiding the strip as a free-hanging loop between the two top roller chambers through the heating and cooling stations during a process of annealing. 1. An annealing installation for the continuous annealing of metal strip guided through the installation , comprising:an entrance chute;a heating station with heating means;a cooling station with cooling means;wherein the entrance chute, the heating station and the cooling station being positioned one after the other and being connected to each other substantially gastight such that they delimit a longitudinal meandering substantially gastight strip treatment tunnel which is to be filled with a shielding gas and which has vertically directed tunnel parts connected to each other by means of a top roller chamber having at least one roller for guiding the strip from the one to the other vertically directed tunnel part,wherein the tunnel having a strip inlet and a strip outlet at its respective outer ends which are both provided with shielding gas closures,wherein the installation further comprises a discharge chute downstream of the cooling station and being connected substantially gastight thereto,wherein the entrance chute, a first one of the top roller chambers, the heating station, the cooling station, a second ...

FILAMENT

A filament according to an aspect of the present invention includes a predetermined chemical composition, in which a diameter r of the filament is 0.15 mm to 0.35 mm, a soft portion is formed along an outer circumference of the filament, the Vickers hardness of the soft portion is lower than that of a position of the filament at a depth of ¼ of the diameter r by Hv 50 or higher, the thickness of the soft portion is 1 μm to 0.1×r mm, the metallographic structure of a center portion of the filament contains 95% to 100% of pearlite by area %, the average lamellar spacing of pearlite in a portion from a surface of the filament to a depth of 1 μm is less than that of pearlite at the center of the filament, the difference between the average lamellar spacing of pearlite in the portion from the surface of the filament to the depth of 1 μm and the average lamellar spacing of pearlite at the center of the filament is 2.0 nm or less, and the tensile strength is 3200 MPa or higher. 1. A filament comprising , as a chemical composition , by mass % ,C: 0.70% to 1.20%,Si: 0.15% to 0.60%,Mn: 0.10% to 1.00%,N: 0.0010% to 0.0050%,Al: 0% to 0.010%,Ti: 0% to 0.10%,Cr: 0% to 0.50%,Co: 0% to 0.50%,V: 0% to 0.50%,Cu: 0% to 0.20%,Nb: 0% to 0.100%,Mo: 0% to 0.20%,W: 0% to 0.200%,B: 0% to 0.0030%,REM: 0% to 0.0050%,Ca: 0% to 0.0050%,Mg: 0% to 0.0050%,Zr: 0% to 0.0100%, anda remainder including Fe and impurities,wherein a diameter r of the filament is 0.15 mm to 0.35 mm,a soft portion is formed along an outer circumference of the filament,a Vickers hardness of the soft portion is lower than that of the filament at a depth of ¼ of the diameter r by a Hv 50 or higher,a thickness of the soft portion is 1 μm to 0.1×r mm,a metallographic structure of the filament other than the soft portion contains 95% to 100% of pearlite by area %,an average lamellar spacing of the pearlite in a region from a surface of the filament to a depth of 1 μm is less than that of the pearlite at the center of the ...

RAPID-COOLING QUENCHING APPARATUS AND RAPID-COOLING QUENCHING METHOD

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

COOLING METHOD AND DEVICE FOR COOLING A WIRE AND CORRESPONDING WIRE-PROCESSING INSTALLATION

Cooling device () for cooling a wire (), comprising a first chamber () and a second cooling chamber () through which the wire () passes. The device also comprises cooling liquid driving means () for driving the cooling liquid from the first chamber () to the second chamber () through at least one coding liquid inlet (). Through the driving means () and the cooling liquid inlet (), a jet of coding liquid is projected on the wire path at a mean speed of at least 0.6 m/s, and at a distance between 6 and 13 times the diameter of the wire (). Cooling is performed in an inert gas atmosphere inside the second chamber (). The invention also relates to a corresponding installation and a corresponding wire cooling method. 1. A cooling method for cooling a wire running along a wire path in a cooling device for cooling a wire , comprising:a first containing chamber for containing a cooling liquid, further comprising:a second cooling chamber comprising a wire inlet and a wire outlet arranged with respect to one another such that they define a wire path and at least one cooling liquid inlet and one cooling liquid outlet,cooling liquid driving means fluidically connecting said first and second chambers for driving said cooling liquid from said first chamber to said second chamber through said at least one cooling liquid inlet,said cooling liquid outlet furthermore extending into said first chamber, such that when said cooling device is in operation, the distal end of said cooling liquid outlet is submerged in the cooling liquid held in said first chamber,said driving means and the cross-section of said at least one cooling liquid inlet being dimensioned to project a jet of cooling liquid on said wire path, whereinthe device further comprises means for introducing inert gas, functionally associated with said second chamber to create an inert gas atmosphere inside said second chamber during the cooling of said wire, andthe method further comprises:a cooling liquid projection step, ...

METHOD AND DEVICE FOR COOLING A STEEL STRIP TRAVELLING IN A CONTINUOUS LINE COOLING SECTION

Process and device for cooling a steel strip () running through the cooling section () of a continuous line, whereby cooling is achieved by projecting the strip with an aqueous solution of formic acid with a concentration of formic acid between 0.1% and 6%, and preferably between 0.5% and 2%. 112. Cooling process for a steel strip () running through the cooling section () of a continuous line , including a projection onto the said strip of a projecting solution , said solution being a liquid or a mixture of a liquid solution and a gas , characterized by the said liquid solution having a formic acid concentration of between 0.1% and 6% by mass.2. Process as per claim 1 , where the liquid solution has a formic acid concentration of between 0.5% and 2% by mass.3. Process as per claim 1 , where the solution is projected onto the steel strip by spraying.413. Process as per claim 1 , also including a continuous or periodic check of the solution to be projected claim 1 , said check including a measurement of at least one physico-chemical datum of the said solution—from the group including pH claim 1 , density and formic acid concentration claim 1 , or a combination of these physico-chemical data claim 1 , and claim 1 , when this measurement does not fall within a predetermined range of tolerance claim 1 , a predetermined volume of the projected solution is drawn off and the same predetermined volume of a formic acid solution is injected into the projection unit () claim 1 , said predetermined volume of formic acid solution having a concentration of formic acid such that the liquid solution to be projected claim 1 , following the injection claim 1 , is of a concentration of formic acid between 0.1% and 6%.5. Process as per claim 4 , where the liquid solution to be projected following the injection has a formic acid concentration between 0.5% and 2% by mass.6. Process as per claim 1 , where the solution drawn off is treated through oxidation with oxygenated water claim 1 , ...

Steel strip coiling temperature control method, device for the same and steel strip processing system

The present disclosure discloses a steel strip coiling temperature control method, a steel strip coiling temperature control device and a steel strip processing system, which relate to the technical field of steel strip production. The method comprises: seeking a corresponding speed compensation coefficient according to a target thickness of the steel strip and a target temperature parameter; seeking a corresponding speed gain coefficient from a second correspondence table according to a steel strip speed; correcting the steel strip speed based on the speed compensation coefficient and the speed gain coefficient to obtain a corrected steel strip speed; and adjusting a cooling efficiency of a laminar flow cooling apparatus according to the corrected steel strip speed. With the method, the cooling efficiency of the laminar flow cooling apparatus can be dynamically adjusted according to the steel strip speed, thereby solving the problem that that there is a great difference in coiling temperature between a tail section of the steel strip and a front section of the steel strip caused by the steel strip throwing process, and reducing the amount of cutting loss of the steel strip.

A method for manufacturing a thermally treated steel sheet

A method for manufacturing a thermally treated steel sheet is described. The method includes: A. a preparation step including: 1) a selection substep, wherein the chemical composition and m target are compared to a list of predefined products, which microstructure includes predefined phases and predefined proportion of phases, and selecting a product having a microstructure m standard closest to m target and a predefined thermal path TP standard to obtain m standard , 2) a calculation substep, wherein at least two thermal path TP x , each TP x corresponding to a microstructure mx obtained at the end of TP x , are calculated based on the selected product of step A.1) and TP standard and the initial microstructure mi of the steel sheet to reach m target , 3) an selection substep, wherein one thermal path TP target to reach m target is selected, TP target chosen from TP x and selected such that m x is the closest to m target , B. a thermal treatment step, wherein TP target is performed on the steel sheet.

Method for manufacturing steel sheet for rotor core for ipm motor

The present invention manufactures a steel sheet for a rotor core for an IPM motor, wherein the steel sheet has a magnetic flux density B 8000 of 1.65 T or more as measured when magnetic field strength is 8000 A/m, and a residual magnetic flux density Br of 0.5 T or more as measured at that time, and optionally, a coercivity Hc of 100 A/m or more as measured after magnetization reaches 8000 A/m. By using the steel sheet manufactured according to the present invention for a rotor core of an IPM motor, it is possible to increase further an output torque in a high-speed rotational range and raise further the maximum rotational speed.

METHOD AND APPARATUS FOR PRODUCING A STEEL STRIP

The invention relates to a method and to an apparatus for producing a steel strip, in particular a steel strip having a bainitic microstructure, such as for example a spring steel strip or a punching tool, wherein the steel strip is made to pass continuously through the following treatment steps: austenitization of the steel strip at a first temperature above the austenitization temperature; quenching of the steel strip, by means of a gaseous quenchant, to a lower, second temperature selected in accordance with a desired steel microstructure. According to the invention, the gaseous quenchant is conducted onto the steel strip in such a manner that uniform cooling is achieved over the width of the steel strip. 118-. (canceled)19: A method for producing a steel strip having a bainitic microstructure , comprising: austenitization of the steel strip at a first temperature above the austenitization temperature;', 'quenching of the steel strip, by a quenchant, to a lower, second temperature lying in the bainitization range of the steel strip;', 'holding the steel strip at a temperature in the bainitization range for the quasi-isothermal formation of a bainite microstructure in the steel strip;, 'passing carbon-containing steel strip continuously through following treatmentswhereinuse is made of a gaseous quenchant, which is conducted onto the steel strip such that uniform cooling at a predefined cooling rate is achieved over the width of the steel strip, wherein the gaseous quenchant is guided in a temperature-controlled circuit and the flow rate of the gaseous quenchant is varied over the width of the steel strip.20: The method as claimed in claim 19 , wherein the gaseous quenchant is conducted onto the steel strip by two or more independently controllable gas streams.21: The method as claimed in claim 19 , wherein a hydrogen-containing gas mixture is used as the quenchant.22: The method as claimed in claim 21 , wherein the hydrogen proportion of the gas mixture used as ...

Method of producing galvannealed steel sheet

A method of producing a galvannealed steel sheet whereby favorable coating appearance can be obtained with high coating adhesion even in the case of galvannealing a steel strip whose Si content is 0.2 mass % or more, and a decrease in tensile strength can be prevented by lowering the alloying temperature. Mixed gas of humidified gas and dry gas, and dry gas are supplied to a soaking zone in an annealing furnace. The mixed gas is timely supplied from a position of lower half of the soaking zone. The dry gas is timely supplied from near an upper hearth roll in the soaking zone, and furnace gas is timely discharged from a gas discharge port located higher than the upper hearth roll, to control a dew point in at least an uppermost part of the soaking zone to −20° C. or more and 0° C. or less.

Method For The Heat Treatment Of A Steel Reinforcement Element For Tires

The method for the heat treatment of a steel reinforcing element (F) for a tire comprises a transformation of the steel microstructure and in which the temperature of the reinforcing element (F) is reduced during the transformation of the steel microstructure by simultaneously extracting heat from the reinforcing element (F) and supplying heat to the reinforcing element (F). 114.-. (canceled)15. A method for the heat treatment of a steel reinforcing element for a tire , comprising a transformation of the steel microstructure and wherein the temperature of the reinforcing element is reduced during the transformation of the steel microstructure by simultaneously extracting heat from the reinforcing element and supplying heat to the reinforcing element.16. The method according to claim 15 , wherein the heat is extracted from the reinforcing element by thermal convection in contact with at least one cold source.17. The method according to claim 15 , wherein the heat is supplied to the reinforcing element by the Joule effect through the reinforcing element.18. The method according to claim 15 , wherein the heat is extracted from the reinforcing element by means for extracting heat from the reinforcing element comprising:a run chamber of the reinforcing element containing an intermediate cold source arranged between the reinforcing element and an external cold source, anda chamber for circulation of the external cold source arranged around the run chamber of the reinforcing element.19. The method according to claim 18 , wherein the intermediate cold source comprises a heat exchange gas.20. The method according to claim 19 , wherein the heat exchange gas comprises a gas selected from reducing gases claim 19 , inert gases and mixtures of these gases.21. The method according to claim 18 , wherein the external cold source comprises a heat exchange liquid.22. The method according to claim 15 , wherein the heat is supplied to the reinforcing element by means for supplying heat ...

Induction heat treating apparatus

A continuous induction heat treating apparatus is provided including a conveyor path defining an axis for a workpiece to be conveyed through the apparatus. The apparatus includes an induction heating station positioned along the conveyor path and operable to induce heating in the workpiece as the workpiece is conveyed through the induction heating station. A quenching station is positioned in a downstream direction from the induction heating station. The quenching station is coupled to a water supply and includes a plurality of sprayers in fluid communication with the water supply and operable to spray water toward the axis for quenching the workpiece as the workpiece is conveyed through the quenching station. The apparatus further includes a quench adjustment mechanism including an actuator coupled to at least a first one of the plurality of sprayers for re-positioning a point of intersection defined between the first sprayer and the axis.

METHOD FOR MANUFACTURING THIN-SPECIFICATION HIGH-TI WEAR-RESISTANT STEEL NM450

A method for manufacturing thin-specification high-Ti wear-resistant steel NM450 comprises the steps of preparing melted iron in a blast-furnace, preprocessing the melted iron, smelting the melted iron in a converter, refining the melted steel in a LF furnace, refining the melted steel in a RH furnace, conventional slab continuous casting, heating the slab in a heating furnace, dephosphorizing the slab by high-pressure water, heating the slab in a hot continuous rolling mill, performing ultra fast cooling, reeling, flattening, heating, quenching, tempering and finishing. 1. A method for manufacturing thin-specification high-Ti wear-resistant steel NM450 , comprising the steps of:(1) slagging off qualified melted iron with a temperature greater than 1250° C. and a [S] no more than 0.020%, and removing S by KR according to requirements on a temperature, a weight and a sulfur content at a desulfurization end of incoming melted iron, wherein [S] is no more than 0.0020%, a whole-course argon blowing technology is employed, and an alkalinity of final slags ranges from 3.0 to 4.0;(2) smelting the melted iron in a converter, using pellet as a coolant, and adding the pellet and oxidized scale according to relevant regulations; and adding fluorite in a small amount in batches according to slag situations in the converter, wherein no more than 4 kg of fluorite is added in each ton of steel and no more than 5.5 kg of fluorite is added in each ton of steel during double slag, adding the fluorite 2 min before a blowing end point is strictly forbidden, double slag cutoff tapping is performed by using a slag-blocking awl and a slag-blocking plug, a slag thickness is no more than 50 mm, and deoxidizing is performed by a step-by-step deoxidation technology in the course of converter tapping;{'sub': '2', '(3) feeding the melted steel to a LF refining station, and after the melted steel enters the refining station, stirring the melted steel by argon at a flow rate of 300 NL/min to 800 ...

WIRE ROD FOR SPRINGS WITH EXCELLENT CORROSION FATIGUE RESISTANCE, STEEL WIRE, AND MANUFACTURING METHOD THEREOF

An aspect of the present invention relates to a wire rod for springs with high strength and excellent corrosion fatigue resistance, in which a combination of Cr, Cu, and Ni content is controlled to an appropriate level, the maximum depth of corrosion pits is set to be below a certain level, and fine carbides containing Mo are set to be at a certain level or greater. 1. A wire rod for springs with excellent corrosion fatigue resistance , comprising:C: 0.40 to 0.70%, Si: 1.30 to 2.30%, Mn: 0.20 to 0.80%, Cr: 0.20 to 0.80%, Cu: 0.01 to 0.40%, Ni: 0.10 to 0.60%, Mo: 0.01 to 0.40%, P: 0.02% or less, S: 0.015% or less, N: 0.01% or less, and a balance of Fe and inevitable impurities by weight %, {'br': None, '−0.14≤0.70[Cr]−0.76[Cu]−0.24[Ni]≤0.47 \u2003\u2003Equation 1'}, 'wherein the wire rod satisfies equation 1 belowwhere each element symbol is a value of a content of each element measured by weight %,wherein a microstructure comprises 50 area % or less of ferrite and a balance of pearlite, and{'sup': 4', '2, 'wherein the wire rod comprises 8.0×10count/mmor higher of Mo-based carbides.'}2. The wire rod for springs of claim 1 , further comprising:one or more elements selected from among V: 0.01 to 0.20%, Ti: 0.01 to 0.15%, and Nb: 0.01 to 0.10% by weight %.3. The wire rod for springs of claim 1 , wherein the Mo-based carbide includes 5 weight % of higher of Mo based on carbide.4. A method of manufacturing a wire rod for springs with excellent corrosion fatigue resistance claim 1 , comprising: {'br': None, '−0.14≤0.70[Cr]−0.76[Cu]−0.24[Ni]≤0.47 \u2003\u2003Equation 1'}, 'heating a billet to 900 to 1100° C., the billet comprising C: 0.40 to 0.70%, Si: 1.30 to 2.30%, Mn: 0.20 to 0.80%, Cr: 0.20 to 0.80%, Cu: 0.01 to 0.40%, Ni: 0.10 to 0.60%, Mo: 0.01 to 0.40%, P: 0.02% or less, S: 0.015% or less, N: 0.01% or less, and a balance of Fe and inevitable impurities by weight % and satisfying equation 1 belowwhere each element symbol is a value of a content of each element ...

METHOD FOR ROLLING AND/OR HEAT TREATING A METAL STRIP

The invention relates to a method for rolling a metal product (), wherein the metal product is subjected to a rolling operation at a first station (), which rolling operation is controlled by a control device (), wherein the product () is subject to a measurement at a second station (), wherein the product () is subjected to a further processing operation at a third station (), and wherein the product () is in a specified quality at a fourth station (). In order to increase the quality of the produced strip, the invention provides that the method has the following steps: a) measuring the value of a material property (IW) that the second station (); b) feeding the value measured at the second station () to the control device (), comparing the measured value with a value (SW) stored in the control device (), and adjusting a parameter (PPI) if the measured value deviates from the stored value (SW), e) measuring a value of a quality material property (Q) at the fourth station (); d) comparing the measured value with a stored value, and initiating a measure to influence the quality material property (Q) if the measured value deviates from the stored value beyond a permissible tolerance 1112314251641761. A method of rolling and/or heat treating a metallic product () , in particular a strip or sheet , wherein the product () is subjected at a first position () to a rolling and/or heat treating operation which is controlled and/or regulated by a control device and/or regulating device () , wherein the product () is subjected at a second position () downstream from the first position () to a measuring by a measuring device () , wherein the product () is subjected at a third position () downstream from the second position () to another working operation , and wherein the product () is present at a fourth position () downstream from the third position () in a given quality , wherein the quality of the product is characterized by the quality-material property (Q) of the product ...

High-strength wire rod having superior impact toughness and manufacturing method therefor

The present invention relates to a high-strength wire rod superior in impact toughness and a manufacturing method therefor and, more particularly, to a high-strength wire rod having superior impact toughness, which can be preferably used as a material for industrial machines or automobiles exposed to various external load environments, and a manufacturing method therefor.

Method for Reducing Nitrogen Oxides In Strip Treatment Furnaces

The invention relates to a method for treating metal strip in a directly fired furnace through which the metal strip is guided. The furnace is fired directly by gas burners and has a non-fired zone through which the exhaust gases from the fired zone flow and thus heat the metal strip. After leaving the non-fired zone, the exhaust gases from the furnace undergo post-combustion in an afterburner chamber. According to the invention, methane is injected into the non-fired zone, which causes nitrogen oxides contained in the waste gas to be converted into hydrogen cyanide. 15-. (canceled)651. A method for treating a metal strip () in a directly fired furnace () , comprising the steps of:{'b': 1', '7', '2', '9', '7, 'providing a furnace () having a non-fired zone () rear of a directly fired zone () that is fired by gas burners and an afterburner chamber () rear of the non-fired zone (),'}{'b': 5', '7', '2', '14', '2', '5', '9, 'running a guided metal strip () forward through the furnace from the non-fired zone () and directly-fired zone (), wherein exhaust gases () generated in the fired zone () flow and pre-heat the metal strip () and then undergo post-combustion the afterburner chamber (), and'}{'b': 14', '7', '14, 'injecting methane into the exhaust gas () in the non-fired zone (), thereby converting nitrogen oxides present in the exhaust gas () to hydrogen cyanide.'}79. The method according to claim 6 , comprising injecting air or oxygen into the post-combustion chamber () claim 6 , thereby which degrading the hydrogen cyanide.87. The method according to claim 7 , comprising adding nitrogen to the methane to form a nitrogen-methane mixture that is injected into the non-fired zone ().97. The method according claim 8 , wherein the methane is injected into the non-fired zone () at several different locations.1078851. The method of claim 9 , wherein the non-fired zone () has a plurality of nozzles () claim 9 , the nozzles () being configured to deliver nitrogen in the ...

Electrical transformer assembly

A support frame for an electrical transformer assembly, comprising two loop-shaped parts, each loop-shaped part having a plurality of limbs, each limb having a peripheral recessed portion in which a primary electrical coil is mountable, and at least one secondary coil is mountable in piggyback on the primary electrical coil, one limb of each loop-shaped part having a straight section. The frame also includes an adjustable attaching means for attaching one of the loop-shaped parts with respect to the other loop-shaped part and adjusting a distance therebetween, so that only the straight sections are adjacent and form a central leg, the central leg being for receiving a magnetic core distinct from the attaching means. The frame provides a means and a method to efficiently secure adjacent windings in a circular core transformer kernel.

Method and an arrangement for manufacturing a hot dip galvanized rolled high strength steel product

A method and arrangement for manufacturing hot dip galvanized rolled high strength steel product is presented. The method comprises providing a rolled steel product, heating and annealing the rolled steel product for creating a layer of iron oxide on the surface of the rolled steel product, cooling the rolled steel product, having the iron oxide layer, in a first cooling step to a temperature in a temperature range of 560-600° C. and holding for 3-10 seconds, quenching said rolled steel product, covered with the layer of iron oxide, in a second cooling step by immersing it into a zinc bath comprising aluminium and having a temperature between 440-450° C. for 1-5 seconds and cooling the rolled steel product in a third cooling step to room temperature. An arrangement for implementing the method is also presented.

SYSTEM AND METHOD FOR TREATING AN AMORPHOUS ALLOY RIBBON

A method and a system for continuously in-line annealing a forwarding ferromagnetic amorphous alloy ribbon in a curved shape to improve its magnetic properties without causing the ribbon to become brittle and which operates at significant high ribbon feeding rates. The amorphous alloy ribbon is fed forward, tensioned and guided along a path at a preset feeding rate and is heated at a point along the path at a rate greater than 10° C./sec to a temperature to initiate a thermal treatment. Then the ribbon is initially cooled at a rate greater than 10° C./sec until the thermal treatment ends. During the thermal treatment, a series of mechanical constraints is applied on the ribbon until the amorphous alloy ribbon adopts a specific shape at rest after the thermal treatment is ended. After the initial cooling, the amorphous alloy ribbon is subsequently cooled at a sufficient rate to a temperature that will preserve the specific shape. 1. A heat-treated iron-based amorphous alloy ribbon , where said ribbon is ductile at normal room temperature , and wherein upon stacking or rolling up said ribbon to form a core , said ribbon has a Bgreater than 1.3 Tesla and a B/Bthat is greater than 0.80.2. The heat-treated iron-based amorphous alloy ribbon according to claim 1 , wherein the ribbon is completely ductile at a temperature greater than normal room temperature.3. The heat-treated iron-based amorphous alloy ribbon according to claim 1 , having at least one side coated with a dielectric material.4. The heat-treated iron-based amorphous alloy ribbon according to claim 3 , wherein the dielectric material is an organic dielectric material.5. The heat-treated iron-based amorphous alloy ribbon according to claim 1 , having at least one side coated with a binder.6. The heat-treated iron-based amorphous alloy ribbon according to claim 1 , wherein the ribbon is cuttable or punchable in segments having predetermined lengths or outlines.7. The heat-treated iron-based amorphous alloy ...

SECTION AND METHOD FOR COOLING A CONTINUOUS LINE COMBINING DRY COOLING AND WET COOLING

Cooling section for a steel strip continuous annealing or galvanizing line arranged to handle a metal strip (), said section comprising at least one area () for dry cooling set up to project gas on said steel strip and at least one wet cooling area () set up to project a liquid or a mixture of gas and liquid on said steel strip. 1125. Cooling section for a steel strip continuous annealing or galvanizing line arranged to handle a metal strip () , said section comprising at least one area () for dry cooling set up to project gas on said steel strip and at least one wet cooling area () set up to project a liquid or a mixture of gas and liquid on said steel strip.2. Cooling section as per claim 1 , where the dry cooling area and wet cooling area are arranged in a vertical pass claim 1 , the wet cooling area being located beneath the dry cooling area.34. Cooling section as per claim 1 , also including an atmosphere separation seal () between the dry cooling area and the wet cooling area.48910118921512910514. Cooling section as per claim 3 , where the atmosphere separation seal comprises three pairs of rolls ( claim 3 , claim 3 , ) claim 3 , each of the pairs set transversely to the metal strip running direction claim 3 , said three pairs of rolls creating between them two areas within the said seal claim 3 , respectively a first area () between the first two pairs of rolls ( claim 3 , ) in the strip running direction and located on the dry cooling area () side with means of extraction () claim 3 , and respectively a second area () between the two last pairs of rolls ( claim 3 ,) in the strip running direction and located on the wet cooling area () side with means () to inject an inert gas.5242526272829. Cooling section as per claim 1 , also including a drying and purging system ( claim 1 , claim 1 , claim 1 , claim 1 , claim 1 , ) of the wet cooling area.62728. Cooling section as per claim 5 , where the drying and purging system of the wet cooling area includes equipment ...

STEEL SHEET AND METHOD OF PRODUCING THE SAME

A steel sheet of the present invention has a steel structure obtained by performing a soaking at a dual phase region temperature of Ac1 temperature or higher and lower than Ac3 temperature for a soaking time of 15 seconds or longer and 35 seconds or shorter, next, performing a primary cooling to a temperature range of 250° C. or higher and 380° C. or lower within 3 seconds at a cooling rate of 0.5 ° C./s or more and 30° C./s or less, and performing a retention in a temperature range of 260° C. or higher and 370° C. or lower for 180 seconds or longer and 540 seconds or shorter, in which a yield ratio is 65% or less and tensile strength is 590 MPa or more after the primary cooling. 1. A method of producing a steel sheet using a continuous annealing line , the method comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a first retention process of retaining a base steel sheet having the component composition according to at a dual phase region temperature of Ac1 temperature or higher and lower than Ac3 temperature for 15 seconds or longer and 35 seconds or shorter;'}a primary cooling process of primarily cooling the steel sheet to a temperature range of 250° C. or higher and 380° C. or lower within 3 seconds at a cooling rate of 0.5° C./s or more and 30° C./s or less after the first retention process; anda second retention process of retaining the steel sheet while passing through an overaging section arranged in the continuous annealing line whose temperature is set to 260° C. or higher and 370° C. or lower for a retention time of 180 seconds or longer and 540 seconds or shorter after the primary cooling.2. The method of producing a steel sheet according to claim 1 , {'br': None, 'i': y≤', 'x, 'sup': '(−0.971)', '796700×\u2003\u2003(6).'}, 'wherein, in the second retention process, y that is a product of an overaging section passing temperature which is the retention temperature when the steel sheet passes through the overaging section, and an overaging ...

METHOD OF HARDENING A CLOTHING WIRE FOR PROCESSING TEXTILE FIBRES, AND APPARATUS SYSTEM THEREFOR

A method of hardening a clothing wire for processing textile fibres and to an apparatus system therefor. The clothing wire has a succession of teeth arranged in its longitudinal direction, and the clothing wire is guided through a heating region in a pass-through direction for contact with at least one open flame. The heating region is followed by a quenching bath having a quenching liquid and by a subsequent tempering apparatus. The clothing wire moving in the pass-through direction is flushed around with a protective medium in a transition region between the region of contact with the open flame and the entry into the quenching liquid. 1. A method of hardening a clothing wire for processing textile fibres , the clothing wire having a longitudinal direction and a succession of teeth arranged in the longitudinal direction , the method comprising:guiding the clothing wire through a heating region in a pass-through direction for contact with at least one open flame;following the heating region, guiding the clothing wire through a quenching bath having a quenching liquid;subsequent to the quenching bath, guiding the clothing wire through a tempering apparatus; andflushing the clothing wire moving in the pass-through direction around with a protective medium in a transition region between a region of contact with the open flame and an entry into the quenching liquid.2. The method according to claim 1 , wherein the flushing includes flushing the clothing wire around in the transition region with nitrogen claim 1 , which constitutes the protective medium.3. The method according to claim 1 , wherein the flushing includes surrounding the transition region by a protection chamber and introducing the protective medium into the protection chamber.4. The method according to claim 3 , wherein the introducing the protective medium into the protection chamber increases a pressure in the protection chamber to greater than atmospheric pressure and further including flowing the ...

Method for Producing a Metallic Coated Steel Sheet

A method for producing a metallic coated steel sheet is provided. The method includes continuously annealing a steel sheet in a continuous annealing furnace and hot dip coating the steel sheet. 124-. (canceled)25. A method for the manufacture of a coated steel sheet comprising the following steps:continuously annealing a steel sheet in a continuous annealing furnace; andhot-dip coating the steel sheet; [{'sub': '2', 'pre-heating the steel sheet at a pressure P1 in a pre-heating section comprising an atmosphere A1 made of at least one inert gas and containing 3.0 vol. % of Hor less, the dew point DP1 of A1 being below −20° C., the pre-heating section comprising at least one opening O1 to allow entry of the steel sheet;'}, {'sub': '2', 'heating the steel sheet in a heating section at a pressure P2, higher than P1, comprising an atmosphere A2 made of at least one inert gas and containing 0.5 vol. % of Hor less, the dew point DP2 of A2 being below −40° C., incoming gas including the at least inert gas being continuously injected in the heating section;'}, {'sub': '2', 'soaking the steel sheet in a soaking section at a pressure P3, lower than P2, comprising an atmosphere A3 made of at least one inert gas and containing 3.0 vol. % of Hor less, the dew point DP3 of A3 being below −40° C., the soaking section comprising at least one opening O3;'}, {'sub': '2', 'cooling the steel sheet at a pressure P4, higher than atmospheric pressure, in a cooling section comprising an atmosphere A4 made of at least one inert gas and including at least 1.0 vol. % of H, the dew point DP4 of A4 being below −30° C.;'}, {'sub': '2', 'optionally, equalizing the steel sheet in an equalizing section at a pressure P5 comprising an atmosphere A5 made of at least one inert gas and including at least 2.0 vol. % of H, the dew point DP5 of A5 being below −30° C., the equalizing section comprising at least one opening O5; and'}, {'sub': '2', 'transferring the steel sheet in a hot bridle section to guide ...

METHOD FOR PRODUCING A STEEL STRIP WITH IMPROVED BONDING OF METALLIC HOT-DIP COATINGS

A method for producing a steel strip containing, in addition to iron as the main component and unavoidable impurities, one or more of the following oxygen-affine elements in wt. %: Al: more than 0.02, Cr: more than 0.1, Mn: more than 1.3 or Si: more than 0.1, where the surface of the steel strip is cleaned, oxidation-treated and annealed. The treated and annealed steel strip is subsequently coated with a hot-dip coat. In order to be less cost-intensive and to achieve uniform, reproducible adhesion conditions for the coat, the steel strip is oxidation-treated prior to the annealing at temperatures below 200° C., where on the surface of the steel strip, with the formation of oxides with iron from the steel strip, an oxide layer is formed, which contains iron oxide and is reduction-treated during the course of the annealing under a reducing atmosphere to achieve a surface consisting substantially of metallic iron. 1. A method for producing a steel strip containing , in addition to iron as the main component and unavoidable impurities , one or more of the following oxygen-affine elements in wt. %: Al: 0.02 or more , Cr: 0.1 or more , Mn: 1.3 or more , or Si: 0.1 or more , the method comprising:cleaning a surface of the steel strip;oxidation-treating the steel strip at temperatures below 200° C., wherein on the surface of the steel strip, with the formation of oxides with iron from the steel strip, an oxide layer is formed which contains iron oxide;annealing the steel strip, wherein the oxide layer which contains iron oxide is reduction-treated during the annealing under a reducing atmosphere to achieve a surface of the steel strip consisting substantially of metallic iron; andcoating the steel strip with a hot-dip coat.2. The method as claimed in claim 1 , wherein the oxidation treating takes place at temperatures below 150° C.3. The method as claimed in claim 1 , wherein the annealing takes place at temperatures of 660° C. to 880° C.4. The method as claimed in claim 1 ...

APPARATUS FOR ANNEALING ALLOY RIBBON AND METHOD OF PRODUCING ANNEALED ALLOY RIBBON

An apparatus for annealing alloy ribbon, the apparatus comprising: an unwinder unwinding an alloy ribbon from a spool of the alloy ribbon; a heating member comprising a first flat surface, on which the alloy ribbon unwound by the unwinder runs while contacting the first flat surface, the heating member heating the alloy ribbon running while contacting the first flat surface through the first flat surface; a cooling member comprising a second flat surface, on which the alloy ribbon heated by the heating member runs while contacting the second flat surface, the cooling member cooling the alloy ribbon running while contacting the second flat surface through the second flat surface; and a winder winding the alloy ribbon cooled by the cooling member. 1. An apparatus for annealing alloy ribbon , the apparatus comprising:an unwinder unwinding an alloy ribbon from a spool of the alloy ribbon;a heating member comprising a first flat surface, on which the alloy ribbon unwound by the unwinder runs while contacting the first flat surface, the heating member heating the alloy ribbon running while contacting the first flat surface through the first flat surface;a cooling member comprising a second flat surface, on which the alloy ribbon heated by the heating member runs while contacting the second flat surface, the cooling member cooling the alloy ribbon running while contacting the second flat surface through the second flat surface; anda winder winding the alloy ribbon cooled by the cooling member.2. The apparatus for annealing alloy ribbon according to claim 1 , wherein the heating member is housed in a heating chamber.3. The apparatus for annealing alloy ribbon according to claim 1 , wherein a sucking structure sucking the alloy ribbon is provided at at least one of the first flat surface of the heating member or the second flat surface of the cooling member.4. The apparatus for annealing alloy ribbon according to claim 3 , wherein the sucking structure comprises an opening.5 ...

TEMPERATURE-CONTROL DEVICE FOR PARTIALLY COOLING A COMPONENT

The invention relates to a temperature-control device for partially cooling a component, wherein the component is blown on with a fluid in the region to be cooled by means of a nozzle. The nozzle comprises a connecting tube which is connected to a fluid reservoir in a fluid-conducting manner and which is connected to a plurality of nozzle tubes in a fluid-conducting manner 1. Temperature-control device for partially cooling a component , wherein said temperature-control device comprises a nozzle which has for discharging a fluid flow for cooling at least a partial region of the component , and wherein the nozzle has a connecting tube for supplying the fluid from a reservoir and a plurality of nozzle tubes for discharging the fluid , wherein the nozzle tubes are connected to the connecting tube in a fluid-conducting manner at their inlet end and the cross-sectional region of the connecting tube is at least twice as large as the sum of the cross-sectional regions of the nozzle tubes , and wherein the respective length of a nozzle tube is at least 10 times the respective inner diameter , and wherein the center-to-center distance of the outlet openings of adjacent nozzle tubes is 1.5 to 20 times the inner diameter of a nozzle tube.2. Temperature-control device according to claim 1 , wherein the nozzle tubes are each fixed with a further fixing point spaced from the inlet end.3. Temperature-control device according to claim 2 , wherein the nozzle tubes are each at least partially guided circumferentially around the connecting tube and are fixed to the connecting tube with the further fixing point spaced from the inlet end.4. Temperature-control device according to claim 3 , wherein the nozzle tubes are each guided circumferentially around the connecting tube by at least 180°.54. Temperature-control device according to claim 2 , wherein the nozzle tubes are straight in the respective portion between the second fixing point and the outlet end.6. Temperature-control device ...

SPRING STEEL HAVING SUPERIOR FATIGUE LIFE, AND MANUFACTURING METHOD FOR SAME

A spring steel having a superior fatigue life, and a manufacturing method for the same. The chemical components thereof are as follows in weight percentage: C: 0.52-0.62%, Si: 1.20-1.45%, Mn: 0.25-0.75%, Cr: 0.30-0.80%, V: 0.01-0.15%, Nb: 0.001-0.05%, N: 0.001-0.009%, O: 0.0005-0.0040%, P: ≤0.015%, S: ≤0.015%, and Al: ≤0.0045%, with the remainder being Fe and incidental impurities, wherein the following condition is also met 0.02≤(2Nb+V)/(20N+C)≤0.40. The spring steel of the present invention has a microstructure of tempered troostite+tempered sorbite, a prior austenite grain size less than 80 um, a size of alloy nitride and carbide precipitates being 5-60 nm, and a maximum width of single-grain inclusions being less than 30 pm. The spring steel has a handling strength greater than 2020 MPa, superior ductility and toughness (the reduction of area≥40%), and a fatigue life≥800,000 times, thereby meeting application requirements of high-stress springs in industries, such as automobiles, machinery, and the like. 1. A spring steel having a superior fatigue life , wherein its chemical composition based on weight percentage is:C: 0.52-0.62%;Si: 1.20-1.45%;Mn: 0.25-0.75%;Cr: 0.30-0.80%;V: 0.01-0.15%;Nb: 0.001-0.05%;N: 0.001-0.009%;O: 0.0005-0.0040%;P: ≤0:015%;S: ≤0:015%; 'a balance of Fe and unavoidable impurities, wherein the following relationship is satisfied: 0.02≤(2Nb+V)/(20N+C)≤0.40.', 'Al: ≤0:0045%;'}2. The spring steel having a superior fatigue life according to claim 1 , wherein the spring steel has a microstructure that is a tempered troostite+sorbite structure claim 1 , an original austenite grain size≤80 μm claim 1 , a size of alloying nitride and carbide precipitates in the range of 5-60 nm claim 1 , and a maximum width of monoparticle inclusions≤30 um.3. The spring steel having a superior fatigue life according to claim 1 , wherein the spring steel has a machining strength≥2020 MPa claim 1 , an area reduction rate≥40% claim 1 , and a fatigue life≥800000 cycles ...

Device for the in-line measurement of the percentage of austenite in steels

The present invention relates to a device for electromagnetically measuring, in real time, the percentage of austenite contained in a continuously running steel strip during an in-line process for manufacturing or transforming the latter, such that the magnetic field produced by the alternating current flowing through the emitter coil (1) produces, in the steel strip (5), induced currents that generate an induced magnetic field creating, in the receiver coil (2), an electromotive force that can be measured by the voltage measurement device (4), the amplitude of this electromotive force being dependent on the voltage applied to the emitter coil and on the nature of the steel in the strip (5). The device is characterized in that the first and second coils (1, 2) are arranged in parallel to one another with a set distance between them and, in use, on either side of the steel strip (5).

Multipurpose Processing Line for Heat Treating and Hot Dip Coating a Steel Strip

A multipurpose continuous processing line able for heat treating and hot dip coating a steel strip comprising: —an annealing section ( 1 ) for heating the steel strip to a predetermined annealing temperature and for maintaining the steel strip at said annealing temperature, —a first transfer section ( 2 ), —an overaging section ( 3 ) able to maintain the temperature of the steel strip between 300° C. and 700° C., —a second transfer section ( 4 ) able to adjust the temperature of the steel strip to allow the hot dip coating of the strip and, —a hot dip coating section ( 5 ), wherein the first transfer section ( 2 ) comprises, in sequence, cooling means ( 21 ) and heating means ( 22 ).

Metal sheet with tailored properties

Moving metal strips can be heat treated with any number or combination of dimensionally variable tempers across widths, lengths, or thicknesses of a metal strip. To provide dimensionally variable heat treatment, an apparatus can include one or more heating units suitable to increase the temperature of a metal strip moving proximate the apparatus to a heat treatment temperature. The apparatus can also include one or more cooling units positioned near the heating units to absorb heat and cool the metal strip to minimize the amount of heat transferred from a first region of the metal strip that is to be treated to a second region of the metal strip that is not to be treated.

Apparatuses and methods for processing a metal ribbon

An apparatus ( 102 ) for processing a metal ribbon ( 116 ) comprising a main portion ( 118 ) and a sacrificial portion ( 120 ) adjoining the main portion ( 118 ) of the metal ribbon ( 116 ), is disclosed. The apparatus ( 102 ) comprises a heater ( 108 ), configured to heat the main portion ( 118 ) of the metal ribbon ( 116 ) to a first temperature, a first cooler ( 110 ), configured to cool the main portion ( 118 ) of the metal ribbon ( 116 ) from the first temperature to a third temperature lower than the first temperature, a second cooler ( 112 ), configured to cool the main portion ( 118 ) of the metal ribbon ( 116 ) at a first rate from the third temperature to a fourth temperature lower than the third temperature, a drive system ( 124 ), configured to successively advance the main portion ( 118 ) of the metal ribbon ( 116 ) from the heater ( 108 ) to the second cooler ( 112 ) through the first cooler ( 110 ), and a guide system ( 114 ) configured to route the metal ribbon ( 116 ) from the heater ( 108 ) to the second cooler ( 112 ) through the first cooler ( 110 ).

Wire softening apparatus and wire softening method

A softening apparatus includes a cooling liquid reservoir for holding a cooling liquid, a first conducting sheave provided outside of the cooling liquid reservoir for applying a voltage to a wire while guiding the wire, and a second conducting sheave provided in the cooling liquid reservoir for letting a current flow through the wire while guiding the wire as the wire is fed via the first conducting sheave. The softening apparatus is also provided with a liquid level detector for detecting a liquid level of the cooling liquid in the cooling liquid reservoir. A heating path length of the wire between the first conducting sheave and the second conducting sheave is controlled based on a result of detection by the liquid level detector.

RAPIDLY QUENCHED FE-BASED SOFT-MAGNETIC ALLOY RIBBON AND ITS PRODUCTION METHOD AND CORE

A rapidly quenched Fe-based soft-magnetic alloy ribbon having wave-like undulations on a free surface, the wave-like undulations having transverse troughs arranged at substantially constant intervals in a longitudinal direction, and the troughs having an average amplitude D of 20 mm or less, is produced by a method comprising (a) keeping a transverse temperature distribution in a melt nozzle within ±15° C. to have as small a temperature distribution as possible in a melt paddle of the alloy, and (b) forming numerous fine linear scratches on a cooling roll surface by a wire brush, thereby providing a ground surface of the cooling roll with an arithmetical mean (average) roughness Ra of 0.1-1 μm and a maximum roughness depth Rmax of 0.5-10 μm. 1. A method for producing a quenched Fe-based amorphous alloy ribbon having wave-like undulations on a free surface by a single roll method , said wave-like undulations having transverse troughs arranged at longitudinal intervals , and said troughs having an average amplitude D of 20 mm or less , the method comprising the steps of (a) keeping a transverse temperature distribution in a melt nozzle within ±15° C. to have as small a temperature distribution as possible in a melt paddle of said alloy by using a heating nozzle having a slit-shaped opening for blowing a heating gas onto the melt nozzle , the length of the slit-shaped opening of the heating nozzle being 1.2-2 times the horizontal length of a slit-shaped orifice of the melt nozzle , the temperature of a heating gas ejected from the heating nozzle being 1000-1400° C.; and (b) forming numerous fine linear scratches on a cooling roll surface by a wire brush , thereby providing a ground surface of said cooling roll with an arithmetical mean (average) roughness Ra of 0.1-1 μm and a maximum roughness depth Rmax of 0.5-10 μm.2. The method for producing a quenched Fe-based amorphous alloy ribbon according to claim 1 , wherein a hood is disposed claim 1 , the melt nozzle and the ...

Micro-alloyed high-strength multi-phase steel containing silicon and having a minimum tensile strength of 750 mpa and improved properties and method for producing a strip from said steel

A high-strength multi-phase steel having minimum tensile strengths of 750 MPa and preferably having a dual-phase microstructure for a cold- or hot-rolled steel strip, in particular for lightweight vehicle construction is disclosed. The high-strength multi-phase steel has improved forming properties and a ratio of yield point to tensile strength of at most 73%. The high-strength multi-phase steel includes in mass %: C≧0.075 to ≦0.105; Si≧0.600 to ≦0.800; Mn≧1.000 to ≦0.700; Cr≧0.100 to ≦0.480; Al≧0.010 to ≦0.060; N 0.0020≦0.0120; S≦0.0030; Nb≧0.005 to ≦0.050; Ti≧0.0050 to ≦0.050; B≧0.0005 to ≦0.0040; Mo≦0.200; Cu≦0.040%; Ni≦0.040% the remainder iron, including typical elements accompanying steel that are not mentioned above, which represent contamination resulting from smelting.

APPARATUSES AND METHODS FOR PROCESSING A METAL RIBBON

An apparatus () for processing a metal ribbon () comprising a main portion () and a sacrificial portion () adjoining the main portion () of the metal ribbon (), is disclosed. The apparatus () comprises a heater (), configured to heat the main portion () of the metal ribbon () to a first temperature, a first cooler (), configured to cool the main portion () of the metal ribbon () from the first temperature to a third temperature lower than the first temperature, a second cooler (), configured to cool the main portion () of the metal ribbon () at a first rate from the third temperature to a fourth temperature lower than the third temperature, a drive system (), configured to successively advance the main portion () of the metal ribbon () from the heater () to the second cooler () through the first cooler (), and a guide system () configured to route the metal ribbon () from the heater () to the second cooler () through the first cooler (). 1102116118120118116102. An apparatus () for processing a metal ribbon () comprising a main portion () and a sacrificial portion () adjoining the main portion () of the metal ribbon () , the apparatus () comprising:{'b': 108', '118', '116, 'a heater () configured to heat the main portion () of the metal ribbon () to a first temperature;'}{'b': 110', '118', '116, 'a first cooler () configured to cool the main portion () of the metal ribbon () from the first temperature to a third temperature lower than the first temperature;'}{'b': 112', '118', '116, 'a second cooler () configured to cool the main portion () of the metal ribbon () at a first rate from the third temperature to a fourth temperature lower than the third temperature;'}{'b': 124', '118', '116', '108', '112', '110, 'a drive system () configured to successively advance the main portion () of the metal ribbon () from the heater () to the second cooler () through the first cooler (); and'}{'b': 114', '116', '108', '112', '110, 'a guide system () configured to route the metal ...

COOLING APPARATUS FOR METAL STRIP AND CONTINUOUS HEAT TREATMENT FACILITY FOR METAL STRIP

A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is ΔXn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is ΔXn. The staggered array of the first nozzles and the staggered array of the second nozzles are disposed offset from each other such that, a center of the second nozzle is at a position offset by a shift amount S from a center of the first nozzle in the width direction, and the center of the second nozzle is positioned in a region defined by an oval having a semi-axis of ΔXn/4 in the width direction and a semi-axis of Yn/3 in the longitudinal direction. The shift amount S is expressed by S=m×ΔXn/2, where m is an odd number such that S is closest to Xn/2. 1. A cooling apparatus for a metal strip , comprisinga plurality of first nozzles and a plurality of second nozzles disposed on both sides of a metal strip in a strip thickness direction, respectively, across a pass line of the metal strip,wherein the plurality of first nozzles forms a staggered array having a pitch of Xn in a strip width direction of the metal strip, a pitch of Yn in a longitudinal direction of the metal strip, and a displacement amount of ΔXn in the strip width direction between a pair of the first nozzles adjacent to each other in the longitudinal direction, ...

METHOD FOR COOLING STEEL STRIP AND COOLING APPARATUS

[Object] To provide a method for cooling a steel strip in a galvannealing furnace. The method performs mist cooling on a steel strip in a cooling zone of a galvannealing furnace and can achieve both productivity and quality. 1. A method for cooling a steel strip by mist cooling in a cooling installation of a galvannealing furnace configured to perform galvannealing treatment on a hot-dip galvanized steel strip , the method comprising:by an adjusted cooling installation provided at an upstream side in a sheet-passing direction of the cooling installation, jetting mist to the steel strip passing through the cooling installation in a manner that an amount of mist jetted to the steel strip passing through the cooling installation is smaller in an edge portion in a width direction of the steel strip than in a center portion;by a mist suction installation provided at least at a downstream side in the sheet-passing direction of the cooling installation, sucking at least part of mist jetted to the steel strip; andcooling the steel strip at a sheet-passing speed such that, during a period between start and end of cooling of the steel strip, a temperature of the steel strip is within a film boiling temperature range and a temperature of the edge portion in the width direction of the steel strip is equal to or higher than a temperature of the center portion in at least a range of ⅔ or more from the upstream side in the sheet-passing direction of a total cooling length of the cooling installation.2. The method for cooling a steel strip according to claim 1 , wherein claim 1 , with respect to an installation length L [m] of the adjusted cooling installation claim 1 , a speed of the steel strip is set to be equal to or less than an upper limit speed V[m/s] calculated using a formula (a) below claim 1 ,{'br': None, 'i': V', 'L', 'T', 'm', 'T', 'th, 'sub': max', 'in', 'in, '=(×(−β′)̂×(−γ′))/(α′×)\u2003\u2003(a),'}{'sub': 'in', 'where T[° C.] denotes a temperature of the center ...

Steel-strip production apparatus

A steel-strip production apparatus adapted to produce a hot-dip-plated steel strip and a cold-rolled steel strip includes a continuous annealing furnace, a snout connected to the continuous annealing furnace, a contact-type seal plate device and a noncontact-type seal roll device, a hot-dip-plating tank that is movable, and a roll configured to turn the path direction of the steel strip after passing through the snout, wherein a hot-dip-plated steel strip production unit configured to produce a hot-dip-plated steel strip by bringing the steel strip continuously annealed in the continuous annealing furnace into the hot-dip-plating tank; and a cold-rolled steel strip production unit configured to produce a cold-rolled steel strip by transferring the steel strip continuously annealed in the continuous annealing furnace without causing the steel strip to pass through the hot-dip-plating tank, are configured to be switchable with one another.

METHOD OF PRODUCING HOT-DIP GALVANIZED STEEL SHEET

A method includes: annealing a steel strip by conveying the steel strip through a heating zone, a soaking zone, and a cooling zone in this order inside an annealing furnace; and applying a hot-dip galvanized coating onto the steel strip discharged from the cooling zone. Reducing gas or non-oxidizing gas supplied into the soaking zone includes humidified gas and dry gas. While a width and a sheet passing speed of the steel strip passing through the soaking zone are constant, a variation of pressure in the annealing furnace is suppressed by adjusting a flow rate of the dry gas, and a variation range of an amount of moisture supplied into the soaking zone by the humidified gas is limited to 20% or less. 1. A method of producing a hot-dip galvanized steel sheet using a continuous hot-dip galvanizing apparatus that includes: an annealing furnace in which a heating zone , a soaking zone , and a cooling zone are arranged in the stated order; and a hot-dip galvanizing line adjacent to the cooling zone , the method comprising:annealing a steel strip by conveying the steel strip through the heating zone, the soaking zone, and the cooling zone in the stated order inside the annealing furnace; andapplying a hot-dip galvanized coating onto the steel strip discharged from the cooling zone, using the hot-dip galvanizing line,wherein reducing gas or non-oxidizing gas is supplied into the soaking zone, the reducing gas or the non-oxidizing gas including: humidified gas humidified by a humidifying device; and dry gas not humidified by the humidifying device, andwhile a width and a sheet passing speed of the steel strip passing through the soaking zone are constant, a variation of pressure in the annealing furnace is suppressed by adjusting a flow rate of the dry gas, and a variation range of an amount of moisture supplied into the soaking zone by the humidified gas is limited to 20% or less.2. The method of producing a hot-dip galvanized steel sheet according to claim 1 , {'br': None ...

Manufacture of a stress relieved length of steel having an oxidised surface layer

An apparatus () for manufacturing a stress relieved length of steel having an oxidised surface layer is disclosed. The apparatus () comprises: a heating chamber (); a reaction chamber () coupled to the heating chamber (); and a conveying mechanism arranged to convey the length of steel along a path through the heating chamber () and reaction chamber (). The heating chamber () comprises a heating apparatus arranged to heat the length of steel in a heating portion () of the path. The apparatus () further comprises a control means comprising a sealed unit defined by the heating chamber () and the reaction chamber (). The control means is arranged to control both the temperature of the length of steel and the atmosphere to which the length of steel is exposed in an oxidisation portion () of the path within the reaction chamber () in which the oxidised surface layer is formed. A method () of manufacturing a stress relieved length of steel having an oxidised surface layer is also disclosed. 1. An apparatus for manufacturing a stress relieved length of steel having an oxidised surface layer , the apparatus comprising:a heating chamber;a reaction chamber coupled to the heating chamber;anda conveying mechanism arranged to convey the length of steel along a path through the heating chamber and reaction chamber,wherein the heating chamber comprises a heating apparatus arranged to heat the length of steel in a heating portion of the path, andwherein the apparatus further comprises a control means comprising a sealed unit defined by the heating chamber and the reaction chamber, the control means arranged to control both the temperature of the length of steel and the atmosphere to which the length of steel is exposed in an oxidisation portion of the path within the reaction chamber in which the oxidised surface layer is formed.2. The apparatus according to claim 1 , wherein the control means further comprises a first atmosphere controller arranged to generate a non-reactive ...

MARTENSITIC STAINLESS STEEL STRIP AND METHOD FOR PRODUCING SAME

A martensitic stainless steel strip capable of achieving higher fatigue strength. This martensitic stainless steel strip has a martensite structure and has a thickness of 1 mm or less, and is characterized in that the compressive residual stress at a surface of the steel strip is 50 MPa or more and the areal ratio of carbides present in the metal structure of the steel strip is 0.5-8.0%. The compressive residual stress at a surface of the steel strip is preferably such that the compressive residual stress in a direction perpendicular to rolling is at least 50 MPa greater than the compressive residual stress in the direction of rolling. 1. A martensitic stainless steel strip having a martensite structure and a thickness of 1 mm or smaller ,wherein compressive residual stress on a surface of the martensitic stainless steel strip is 50 MPa or greater, andwherein an area ratio of carbides present in a metal structure of the martensitic stainless steel strip is 0.5% or more and 8.0% or less.2. The martensitic stainless steel strip according to claim 1 ,wherein regarding the compressive residual stress on a surface of the martensitic stainless steel strip, compressive residual stress in a direction perpendicular to rolling is greater than compressive residual stress in a direction of rolling by 50 MPa or greater.3. The martensitic stainless steel strip according to claim 1 ,wherein when an area ratio of carbides having an equivalent circle diameter of 0.10 μm or larger is 100% of the carbides, an area ratio of carbides having an equivalent circle diameter within a range of 0.10 μm to 0.50 μm is 45% or more.4. A method for producing a martensitic stainless steel strip comprising:an unwinding step of unwinding a martensitic stainless steel strip having a thickness of 1 mm or smaller;a quenching step of threading and heating the steel strip in a quenching furnace with a non-oxidizing gas atmosphere and subsequently performing cooling; anda tempering step of threading and ...

Method and Apparatus for Controlling the Strip Temperature of the Rapid Cooling Section of a Continuous Annealing Line

Provided are a method and apparatus for uniformly controlling the strip temperature of the rapid cooling section of a continuous annealing line. A plurality of sets of cooling nozzle blocks for controlling the strip temperature is installed at the front and back sides of the strip, and is divided into lengthwise flow control nozzle blocks and widthwise flow control nozzle blocks. Strip center temperature meters and widthwise direction temperature meters are installed at the intake and discharge sides of the rapid cooling section. Temperatures obtained using the strip center temperature meters and the width direction temperature meters are used to respectively control the spraying of mist for the lengthwise flow control nozzle blocks and the widthwise flow control nozzle blocks in order to uniformly control the strip temperature and minimize changes in the flatness of the strip. The widthwise temperature meters at the intake and discharge ends of the rapid cooling section of the continuous annealing line are used to detect the temperature. Feedback/feedforward control technique can be used to uniformly control the widthwise temperature of the strip through flow rate control over mist sprayed in the widthwise direction of the rapid cooling section. 1. A method of uniformly controlling a strip temperature in a rapid cooling section of a continuous annealing line , the method comprising steps of:determining valve open ratios of lengthwise flow control nozzle blocks and widthwise flow control nozzle blocks, the nozzle blocks spraying mist to front and rear sides of a strip, based on strip temperature measurement values and strip information;determining opening compensation values of the lengthwise flow control nozzle blocks such that the flow rates of the spray mist are adjusted by deducing an actual discharge-side temperature of the strip at every period from a target discharge-side temperature of the strip with respect to the determined valve open ratios; ...

HEARTH ROLL AND CONTINUOUS ANNEALING FACILITY

Provided is a hearth roll for supporting and conveying a steel sheet in a continuous annealing furnace, wherein all of a shaft portion and a roil main body are made from one or more ceramic materials, preferably constituted with concentric ceramic layers of different ceramic materials centering on the rotation shaft of the roll. The hearth roll has not only an excellent pickup resistance but also a long roll life free from maintenance for long periods. Also provided is a continuous annealing facility using the hearth roll in at least one of a heating zone, a soaking zone and a cooling zone. 19-. (canceled)10. A hearth roll for supporting and conveying a steel sheet in a continuous annealing furnace , wherein all of a shaft portion and a roll main body of the roll are made from one or more ceramic materials.11. The hearth roll according to claim 10 , which is constituted with concentric ceramic layers made from different ceramic materials centering on a rotation axis of the roll.12. The hearth roll according to claim 10 , wherein the shaft portion and the roll main body are made from different ceramic materials.13. The hearth roll according to claim 11 , wherein the shaft portion and the roll main body are made from different ceramic materials.14. The hearth roll according to claim 10 , wherein the roll main body is constituted with different ceramic layers.15. The hearth roll according to claim 11 , wherein the roll main body is constituted with different ceramic layers.16. The hearth roll according to claim 12 , wherein the roll main body is constituted with different ceramic layers.17. The hearth roll according to claim 13 , wherein the roll main body is constituted with different ceramic layers.18. The hearth roll according to claim 10 , wherein the ceramic material has a high-temperature strength of not less than 200 MPa and a thermal shock resistance of not lower than 350° C.19. The hearth roll according to claim 11 , wherein a ratio of thermal expansion ...

METHOD OF CONTINUOUSLY ANNEALING A STRIP

Provided is a method of continuously annealing a strip. The method includes: firstly heating a strip in a first heating zone; firstly cooling the firstly heated strip or maintaining the firstly heated strip at a constant temperature in a first cooling or constant temperature maintaining zone; secondarily heating and soaking the strip, firstly cooled or remaining at the constant temperature, in a second heating and soaking zone; and secondarily cooling the strip, secondarily heated and soaked, in a second cooling zone. 1. A method of continuously annealing a strip comprising:firstly heating a strip in a first heating zone;firstly cooling the firstly heated strip or maintaining the firstly heated strip at a constant temperature in a first cooling or constant temperature maintaining zone;secondarily heating and soaking the strip, firstly cooled or remaining at the constant temperature, in a second heating and soaking zone; andsecondarily cooling the strip, secondarily heated and soaked, in a second cooling zone.2. The method of claim 1 , further comprising:overaging the strip or maintaining the strip at a constant temperature after secondarily cooling the strip; andcooling the strip overaged or remaining at the constant temperature.3. The method of claim 1 , wherein in the first heating zone claim 1 , the strip is heated by an induction heating method claim 1 , a radiant tube heating method claim 1 , or a direct fire heating method claim 1 , a temperature rising rate is 3° C./s to 150° C./s claim 1 , a heating temperature is a maximum of 1000° C. claim 1 , and a holding time is 10 seconds or less.4. The method of claim 1 , wherein in the first cooling or constant temperature maintaining zone claim 1 , cooling the strip or maintaining the strip at the constant temperature is performed by at least one of a gas cooling method claim 1 , a hydrogen cooling method claim 1 , a mist cooling method of mixing and spraying water and gas claim 1 , and a water cooling method of ...

METHOD AND APPARATUS FOR CONTINUOUS THERMAL TREATMENT OF A STEEL STRIP

Disclosed is a method for continuous thermal treatment of a steel strip. The strip passes through consecutive thermal treatment chambers, is quickly cooled in at least one of the chambers by spraying liquid onto the strip, or by spraying a fluid made up of gas and liquid or spraying a combination of gas and liquid forming a mist. After quick cooling, a protective metal layer is deposited on the strip by dip coating. The cooling fluid strips iron oxides or other alloy elements contained in the steel to be treated, minimizing oxidation and reducing the oxides on the strip. Spray pressure and distance are chosen to facilitate the stripping property and the mechanical action of the sprayed fluid, reducing the layer of oxides on the strip. The temperature of the strip at the end of the cooling step is the temperature necessary for carrying out the desired treatment cycle. 2. The process as claimed in claim 1 , further comprising use of a system for controlling the parameters of the reduction process claim 1 , in particular the spraying of the fluid onto the strip in order to achieve the amounts of residual oxides that are compatible with the desired process or the desired quality of the product.3. The process as claimed in claim 1 , wherein the cooling fluid is sprayed by nozzles onto the strip claim 1 , further comprising the adjustment of the parameters for the cooling of the strip by adjusting the amounts of liquid injected onto the strip by each nozzle and for each section of the nozzle width in order to produce a theoretical cooling curve as a function of the metallurgical process to achieve.4. The process as claimed in claim 1 , wherein the liquid having a pickling property that is sprayed onto the strip is an acid solution having a pH of less than 5 claim 1 , in particular a solution of formic or boric acid.5. The process as claimed in claim 1 , wherein the liquid sprayed onto the strip comprises additives.6. The process as claimed in claim 1 , wherein the liquid ...

MICRO-ALLOYED HIGH-STRENGTH MULTI-PHASE STEEL CONTAINING SILICON AND HAVING A MINIMUM TENSILE STRENGTH OF 750 MPA AND IMPROVED PROPERTIES AND METHOD FOR PRODUCING A STRIP FROM SAID STEEL

A high-strength multi-phase steel having minimum tensile strengths of 750 M:Pa and preferably having a dual-phase microstructure for a cold- or hot-rolled steel strip, in particular for lightweight vehicle construction is disclosed. The high-strength multi-phase steel has improved forming properties and a ratio of yield point to tensile strength of at most 73%. The high-strength multi-phase steel includes in mass %: C≥0.075 to ≤0.105; Si≥0.600 to ≤0.800; Mn≥1.000 to ≤0.700; Cr≥0.100 to ≤0.480; Al≥0.010 to ≤0.060; N 0.0020≤0.0120; S≤0.0030; Nb≥0.005 to ≤0.050; Ti≥0.0050 to ≤0.050; B≥0.0005 to ≤0.0040; Mo≤0.200; Cu≤0.040%; Ni≤0.040 % the remainder iron, including typical elements accompanying steel that are not mentioned above, which represent contamination resulting from smelting. 1. A method , comprising:producing a steel strip from of a steel having a composition comprising the elements, in mass %:C≥0.0751 to ≤0.105Si≥0.600 to ≤0.800Mn≥1.000 to ≤1.900Cr≥0.100 to ≤0.700Al≥0.010 to ≤0.060N 0.0020≤0.0120S≤0.0030Nb≥0.005 to ≤0.050Ti≥0.0050 to ≤0.050B≥0.0005 to ≤0.0040Mo≤0.200Cu≤0.040 %Ni≤0.040%remainder iron and steel accompanying elements constituting smelting related impurities,heating the steel strip during a continuous annealing to an annealing temperature in a range of about 700 to 950° C.;cooling the annealed steel strip from the annealing temperature to a first intermediate temperature of about 300 to 500° C. with a cooling rate of between about 15 and 100° C/s; and after the cooling to the intermediate temperature treating the steel strip as set forth under a) or b):a) cooling the steel strip to a second intermediate temperature of about 160 to 250° C. with a cooling rate of between 15 and 100° C./s and after cooling to the second intermediate temperature cooling the steel strip at air to room temperature;b) maintaining the cooling of the steel strip with a cooling rate of between about 15 and 100° C./s from the first intermediate temperature to room ...

Method and apparatus for continuous thermal treatment of a steel strip

Disclosed is a method for continuous thermal treatment of a steel strip. The strip passes through consecutive thermal treatment chambers, is quickly cooled in at least one of the chambers by spraying liquid onto the strip, or by spraying a fluid made up of gas and liquid or spraying a combination of gas and liquid forming a mist. After quick cooling, a protective metal layer is deposited on the strip by dip coating. The cooling fluid strips iron oxides or other alloy elements contained in the steel to be treated, minimizing oxidation and reducing the oxides on the strip. Spray pressure and distance are chosen to facilitate the stripping property and the mechanical action of the sprayed fluid, reducing the layer of oxides on the strip. The temperature of the strip at the end of the cooling step is the temperature necessary for carrying out the desired treatment cycle.

METHOD FOR MANUFACTURING METAL SHEET AND RAPID QUENCHING UNIT

A method for manufacturing a metal sheet comprising pinching the metal sheet in rapid quenching between a pair of pinch rolls in the range where the temperature of the metal sheet is from (T+150) (° C.) to (T−150) (° C.), wherein the Ms temperature of the metal sheet is T(° C.) and the Mf temperature thereof is T(° C.), as well as a rapid quenching unit comprising a pair of pinch rolls capable of use in such a method. 1. A method for manufacturing a metal sheet using a continuous annealing line including a rapid quenching unit for cooling the metal sheet by immersing the metal sheet in a liquid , the method comprising pinching the metal sheet in rapid quenching between a pair of pinch rolls placed in a liquid in a range where a temperature of the metal sheet is from (T+150) (° C.) to (T−150) (° C.) ,{'sub': 'Ms', 'T(° C.) is a Ms temperature at which the martensite transformation of the metal sheet starts,'}{'sub': 'Mf', 'T(° C.) is a Mf temperature at which the martensite transformation thereof finishes.'}2. The method for manufacturing the metal sheet according to claim 1 , wherein a pinch position of the pair of pinch rolls is set on the basis of a threading speed claim 1 , a thickness claim 1 , and a quenching start temperature of the metal sheet.4. The method for manufacturing the metal sheet according to claim 1 , wherein the rapid quenching unit includes water ejecting devices for ejecting cooling water to a front surface and back surface of the metal sheet and a pair of the pinch rolls pinch the metal sheet claim 1 , placed between the metal sheet and the water ejecting devices.5. A rapid quenching unit for cooling a high-temperature metal sheet by immersing the metal sheet in a liquid claim 1 , comprising a pair of pinch rolls claim 1 , wherein the pinch rolls pinch the metal sheet in the range where the temperature of the metal sheet is from (T+150) (° C.) to (T−150) (° C.) claim 1 ,{'sub': 'Ms', 'T(° C.) is a Ms temperature of the metal sheet, and'}{'sub ...

Continuous-flow cooling apparatus and method of cooling strip therewith

The invention relates to a continuous flow cooling device (3) for cooling a metal strip (1), in particular a metal strip made of aluminum or an aluminum alloy, having at least one strip flotation cooler (4), which has several upper nozzles (5) distributed along the strip travel direction (B), and several lower nozzles (6) distributed along the strip travel direction (B), wherein the metal strip (1) can be transported in a floating manner between the upper nozzles (5) and the lower nozzles (6), and the upper side of the strip as well as the underside of the strip can be supplied with cooling air in the process, and having several water cooling units (7), by means of which the metal strip (1) can be supplied with cooling water. This device is characterized in that the water cooling units (7) are integrated in the strip flotation cooler (4).

APPARATUS FOR CONTINUOUS ANNEALING OF STRIP AND METHOD FOR CONTINUOUS ANNEALING OF SAME

An apparatus for continuous annealing of a strip comprises: a first heating zone configured to firstly heat a strip; a first cooling or constant temperature maintaining zone configured to cool the strip firstly heated in the first heating zone or to maintain the strip at a constant temperature; a second heating and soaking zone configured to secondarily heat and soak the strip cooled or remaining at the constant temperature in the first cooling or constant temperature maintaining zone; and a second cooling zone configured to cool the strip heated and soaked in the second heating and soaking zone. 1. An apparatus for continuous annealing of a strip comprising:a first heating zone configured to firstly heat a strip;a first cooling or constant temperature maintaining zone configured to cool the strip firstly heated in the first heating zone or to maintain the strip at a constant temperature;a second heating and soaking zone configured to secondarily heat and soak the strip cooled or remaining at the constant temperature in the first cooling or constant temperature maintaining zone; anda second cooling zone configured to cool the strip heated and soaked in the second heating and soaking zone.2. The apparatus of claim 1 , wherein the first heating zone and the first cooling or constant temperature maintaining zone allow a structure of the strip to be homogenized or formed as a required structure claim 1 , and the second heating and soaking zone and the second cooling zone allow the structure of the strip to be stabilized or formed to have a required shape.3. The apparatus of claim 1 , further comprising:an overaging or constant temperature maintaining zone configured to overage the strip or maintain the strip heated at a constant temperature in the rear of the second cooling zone; anda final cooling zone configured to cool the strip overaged or remaining heated at the constant temperature in the overaging or constant temperature maintaining zone.4. The apparatus of claim ...

CONTINUOUS ANNEALING DEVICE AND CONTINUOUS HOT-DIP GALVANISING DEVICE FOR STEEL STRIP

A large continuous annealing device that anneals a steel strip by multiple passes in a vertical annealing furnace and is capable of quickly switching the atmosphere in the furnace is provided. A steel strip continuous annealing device has a vertical annealing furnace in which a heating zone , a soaking zone , and a cooling zone are arranged in this order, and anneals a steel strip P passing through the zones , and in the order while being conveyed in the vertical direction in the vertical annealing furnace . Adjacent zones communicate through a communicating portion or connecting upper parts or lower parts of the zones. A gas delivery port is provided in each zone, in the position opposite in the vertical direction to the position of the communicating portion with the immediately preceding zone in the steel strip P passing order. 1. A steel strip continuous annealing device that has a vertical annealing furnace in which a heating zone , a soaking zone , and a cooling zone are arranged in the stated order , and anneals a steel strip passing through the zones in the order while being conveyed in a vertical direction in the vertical annealing furnace ,wherein adjacent zones communicate with each other through a communicating portion that connects upper parts or lower parts of the respective zones,a gas delivery port is provided in each of the heating zone, the soaking zone, and the cooling zone, andthe gas delivery port in the heating zone is provided in an upper part of the heating zone, and the gas delivery port in each of the soaking zone and the cooling zone is provided in a position opposite in the vertical direction to a position of a communicating portion with an immediately preceding zone in the order in which the steel strip passes through.2. The steel strip continuous annealing device according to claim 1 ,wherein a communicating portion between the heating zone and the soaking zone connects lower parts of the respective zones, and a communicating portion ...

CONTINUOUS ANNEALING DEVICE AND CONTINUOUS HOT-DIP GALVANISING DEVICE FOR STEEL STRIP

A steel strip continuous annealing device has a vertical annealing furnace in which a heating zone , a soaking zone , and a cooling zone are arranged in this order, and anneals a steel strip P passing through the zones , and in the order while being conveyed in the vertical direction in the vertical annealing furnace . The heating zone , the soaking zone , and the cooling zone communicate through an atmosphere separation portion . One of a gas delivery port and a gas discharge port is positioned in an upper part and the other one of the gas delivery port and the gas discharge port is positioned in a lower part in each of the heating zone , the soaking zone , and the cooling zone 1. A steel strip continuous annealing device that has a vertical annealing furnace in which a heating zone , a soaking zone , and a cooling zone are arranged in the stated order , and anneals a steel strip passing through the zones in the order while being conveyed in a vertical direction in the vertical annealing furnace , comprising:an atmosphere separation portion;a gas delivery port for introducing gas into the vertical annealing furnace; anda gas discharge port for discharging gas from the vertical annealing furnace,wherein the heating zone, the soaking zone, and the cooling zone communicate through the atmosphere separation portion,the gas delivery port and the gas discharge port are provided in each of the heating zone, the soaking zone, and the cooling zone, andone of the gas delivery port and the gas discharge port is positioned in an upper part and the other one of the gas delivery port and the gas discharge port is positioned in a lower part in each of the zones.2. The steel strip continuous annealing device according to claim 1 ,wherein a preheating zone is arranged upstream of the heating zone, the atmosphere separation portion is also provided between the preheating zone and the heating zone, and one of the gas delivery port and the gas discharge port is positioned in the upper ...

METHOD AND EQUIPMENT FOR CONTROLLED PATENTING OF STEEL WIRE

A method of continuous controlled cooling of a plurality of heated steel wires having a diameter larger than 2.8 mm and having an austenite microstructure and of transformation to a pearlite microstructure of the steel wires. The method comprises the steps of: a) Providing a first coolant bath comprising a first coolant liquid. The first coolant liquid comprises water and a stabilizing additive. b) Guiding the plurality of previously heated steel wires parallel to each other along individual paths through the first coolant liquid contained in the first coolant bath; and directing impinging liquid immersed inside the first coolant bath towards each of the steel wires over a certain length L. The impinging liquid decreases the thickness of or destabilizes the steam film around each of the plurality of steel wires, resulting in an increase of the speed of cooling over said length L. The intensity of the impinging liquids is individually set and/or controlled for each individual steel wire or for subsets of the plurality of steel wires. c) Guiding the plurality of steel wires parallel to each other through air for further cooling. 115-. (canceled)16. A method of continuous controlled cooling of a plurality of heated steel wires having an austenite microstructure and of transformation to a pearlite microstructure of the steel wires , wherein the plurality of steel wires comprises steel wires having a diameter larger than 2.8 mm;the method comprises the steps of:a) providing a first coolant bath, wherein the first coolant bath comprises a first coolant liquid, wherein the first coolant liquid comprises water and a stabilizing additive,b) guiding the plurality of previously heated steel wires parallel to each other along individual paths through the first coolant liquid contained in the first coolant bath,and directing impinging liquid immersed inside the first coolant bath towards each of the steel wires over a certain length L; wherein the impinging liquid decreases the ...

LEAD-FREE PATENTING PROCESS AND EQUIPMENT

A method of controlled cooling of one or multiple previously heated and substantially straight steel wire/wires of diameter more than 2.8 mm to a predetermined temperature range, comprises the steps: guiding the previously heated and substantially straight steel wire/wires along individual path/paths through one or multiple first coolant bath/baths comprising a bath liquid comprising water and a stabilizing additive. The bath liquid and the multiple previously heated and substantially straight steel wires create a steam film around each steel wire itself along each individual path; directing an impinging liquid immersed inside the first coolant bath/baths towards the previously heated and substantially straight steel wire/wires over a certain length L along individual path/paths, to cool down the previously heated and substantially straight steel wire/wires, the impinging liquid decreases the thickness of the steam film or destabilizes the steam film, thereby increasing the speed of cooling over the length L along individual path/paths; guiding the previously heated and substantially straight steel wire/wires along individual path/paths out of the first coolant bath/baths to be further cooled down in air; after the further cooling in air, guiding the previously heated, substantially straight steel wire/wires along individual path/paths through one or multiple second coolant bath/baths. In the method, the substantially straight steel wire/wires are subjected to a cooling transformation from austenite to pearlite. 115-. (canceled)17. Method as in claim 16 , wherein the impinging liquid is immersed below each of the previously heated and substantially straight steel wire itself along each individual path; or wherein the impinging liquid is immersed partially below some of the multiple previously heated and substantially straight steel wires along their individual paths.18. Method as in claim 16 , wherein the length of the first coolant bath and/or of the second coolant ...

Ductile Fuse for Special Concentrically Braced Frames and Related Methods

Embodiments of the present disclosure provide a structural improvement in braced frame structures. An exemplary solution involves heat-treating a mid-section region of a steel brace, the steel brace comprising hollow structural sections tubing; after heat-treating the mid-section region, cooling the mid-section region of the steel brace; wherein the heat-treated steel brace has changed mechanical properties due to the heat-treatment, the changed mechanical properties including improved material ductility, work hardening ability, and notch toughness; and coupling the heat-treated steel brace to a gusset plate within a braced building frame structure without need of gusset plate reinforcement. 1. A method comprising:heat-treating a mid-section region of a steel brace, the steel brace comprising hollow structural sections tubing;after heat-treating the mid-section region, cooling the mid-section region of the steel brace causing the heat-treated steel brace to change mechanical properties due to the heat-treatment, the changed mechanical properties including improved material ductility, work hardening ability, and notch toughness; andcoupling the heat-treated steel brace to a gusset plate within a braced building frame structure without need of gusset plate reinforcement.2. The method of claim 1 , further comprising coupling the gusset plate to a column or brace within the braced building frame structure.3. The method of claim 1 , wherein the steel brace comprises cold rolled steel.4. The method of claim 5 , wherein the steel brace is heat-treated at a temperature that relieves residual stresses from prior cold work on the steel brace.5. The method of claim 1 , wherein the mid-section region is heat-treated at a temperature of at least 700° C.6. The method of claim 1 , wherein the mid-section region is heat-treated at a temperature of 700° C. for 30 minutes.7. The method of claim 6 , wherein the mid-section region is cooled at 6° C./min before removing the steel brace ...

Process and device for cooling a metal substrate

A process for cooling a metal substrate running in a longitudinal direction, said process including ejecting at least one first cooling fluid jet on a first surface of said substrate and at least one second cooling fluid jet on a second surface of said substrate, said first and second cooling fluid jets being ejected at a cooling fluid velocity higher than or equal to 5 m/s, so as to form on said first surface and on said second surface a first laminar cooling fluid flow and a second laminar flow respectively, said first and second laminar cooling fluid flows being tangential to the substrate, said first and second laminar cooling fluid flows extending over a first predetermined length and a second predetermined length of the substrate respectively, said first and second lengths being determined so that the substrate is cooled from a first temperature to a second temperature by nucleate boiling.

A METHOD OF DYNAMICAL ADJUSTMENT FOR MANUFACTURING A THERMALLY TREATED STEEL SHEET

The present invention provides a method of dynamical adjustment for manufacturing a thermally treated steel sheet. 143-. (canceled)44: A method of dynamical adjustment for manufacturing a thermally treated steel sheet having a chemical steel composition and a microstructure mcomprising from 0 to 100% of at least one phase chosen among: ferrite , martensite , bainite , pearlite , cementite and austenite , in a heat treatment line comprising a heating section , a soaking section and a cooling section including a cooling system , wherein a predefined thermal treatment TT , comprising at least a heating , a soaking and a cooling steps , is performed , such method comprising:A. a control step wherein at least one detector detects any deviation happening during TT,{'sub': target', 'target, 'claim-text': [{'sub': x', 'i', 'target', 'soaking', 'cooling', 'x', 'x', 'x', 'x', 'x', 'x, '1) a calculation sub-step wherein through variation of the cooling power, new cooling paths CPare calculated based on TT, the initial microstructure mof the steel sheet to reach m, the heating path, the soaking path comprising Tand T, the cooling step of TT being recalculated using said CPin order to obtain new thermal paths TP, having the cooling step replaced by one CPin order to obtain a thermal path TP, each TPcorresponding to a microstructure m,'}, {'sub': target', 'target', 'target', 'x', 'x', 'target, '2) a selection step wherein one TPto reach mis selected, TPbeing chosen among the calculated thermal paths TPand being selected such that mis the closest to mand'}], 'B. a calculation step performed when a deviation is detected during TT such that a new thermal path TPis determined to reach mtaking the deviation into account, such calculation step comprising{'sub': 'target', 'C. a new thermal treatment step wherein TPis performed online on the steel sheet.'}45: The method according to claim 44 , wherein in step A) claim 44 , the deviation is due to a variation of one process parameter ...

COOLING APPARATUS FOR METAL STRIP

A cooling apparatus includes: a first air nozzle configured to spray air to the metal strip from above; a first water nozzle configured to spray water to the metal strip from above; and a gas discharging part configured to discharge an air around the metal strip upwardly, wherein the first air nozzle, the first water nozzle and the gas discharging part are aligned along a transport direction of the metal strip in the order of the first air nozzle, the first water nozzle and the gas discharging part, wherein the cooling apparatus is adapted to collide the air from the first air nozzle against the metal strip and then the air moves along a surface of the metal strip to a point at which steam is generated by the water from the first water nozzle, and is adapted to discharge the steam using the gas discharging part. 1. A cooling apparatus configured to continuously transport a metal strip after heat treatment and cool the metal strip , the cooling apparatus comprising:a first air nozzle configured to spray air to the metal strip from above;a first water nozzle configured to spray water to the metal strip from above; anda gas discharging part configured to discharge an air around the metal strip upwardly, whereinthe first air nozzle, the first water nozzle and the gas discharging part are aligned along a transport direction of the metal strip in the order of the first air nozzle, the first water nozzle and the gas discharging part, whereinthe cooling apparatus is adapted to collide the air from the first air nozzle against the metal strip and then the air moves along a surface of the metal strip to a point at which steam is generated by the water from the first water nozzle, and is adapted to discharge the steam using the gas discharging part.2. The cooling apparatus according to claim 1 , further comprisinga controller configured to control a spray amount of the air from the first air nozzle and a spray amount of the water from the first water nozzle.3. The cooling ...

patented bismuth steel filament.

Steel sheet, member, and methods for producing the same

The steel sheet of the present invention has a steel microstructure containing, in area fraction, martensite: from 20% to 100%, ferrite: from 0% to 80%, and another metal phase: 5% or less, and in which a ratio of a dislocation density in metal phases on a surface of the steel sheet to a dislocation density in the metal phases in a thicknesswise central portion of the steel sheet is from 30% to 80%. The maximum amount of warpage of the steel sheet when the steel sheet is sheared to a length of 1 m in a rolling direction is 15 mm or less.

Sheet steel with applied coating as a result of immersion into melt

FIELD: metallurgy.SUBSTANCE: group of inventions relates to metallurgy, namely to a method of producing sheet steel with applied coating as a result of immersion into molten metal and sheet steel with applied coating, and can be used in automotive industry. Method of making sheet steel with immersion into molten metal with a zinc coating or on an aluminum base involves A) obtaining sheet steel characterized by the following composition, wt%: 0.05 ≤ C ≤ 0.20; 1.5 ≤ Mn ≤ 3.0; 0.10 ≤ Si ≤ 0.45; 0.10 ≤ Cr ≤ 0.60; Al ≤ 0.20; V < 0.005 and optionally one or more elements, such as P < 0.04; Nb ≤ 0.05; B ≤ 0.003; Mo ≤ 0.20; Ni ≤ 0.1; Ti ≤ 0.06; S ≤ 0.01; Cu ≤ 0.1; Co ≤ 0.1; N ≤ 0.01; remaining iron and unavoidable impurities, B) recrystallization annealing of sheet steel in furnace and C) application of coating on annealed sheet steel by its immersion into bath with melt on base of zinc or on base of aluminum.EFFECT: improved wetting and adhesion of the coating.18 cl, 2 dwg, 1 tbl, 10 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 737 371 C1 (51) МПК C23C 2/02 (2006.01) C23C 2/06 (2006.01) C23C 2/12 (2006.01) C23C 2/28 (2006.01) C21D 9/46 (2006.01) C22C 38/38 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C23C 2/02 (2020.05); C23C 2/06 (2020.05); C23C 2/12 (2020.05); C23C 2/28 (2020.05); C21D 9/46 (2020.05); C22C 38/38 (2020.05) (21)(22) Заявка: 2020115777, 19.10.2018 19.10.2018 Дата регистрации: R U (24) Дата начала отсчета срока действия патента: (72) Автор(ы): ЗАПИКО АЛЬВАРЕС, Давид (FR), БЕРТРАН, Флоранс (FR), ЖИРУ, Жорис (FR) (73) Патентообладатель(и): АРСЕЛОРМИТТАЛ (LU) 27.11.2020 (56) Список документов, цитированных в отчете о поиске: EP 2415896 B1, 16.11.2016. EP 3216886 A1, 13.09.2017. RU 2418094 C2, 10.05.2011. RU 2566131 C1, 20.10.2015. 08.11.2017 IB PCT/IB2017/001351 (45) Опубликовано: 27.11.2020 Бюл. № 33 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 13.05.2020 (86) Заявка PCT: 2 7 ...

Method and apparatus for cooling hot rolled steel rod

FIELD: rolling mills, namely process and equipment for controlled cooling of hot rolled steel rod. SUBSTANCE: apparatus includes unit for forming continuous row of loops from hot rolled steel rod; placing loops onto conveyer for transporting overlapped loops along route passing at least through one cooling zone. Closeness of placing loops in terminal zones of conveyer is higher than in central zone of conveyer. Gaseous cooling medium is directed upwards through overlapped loops. Screen or other similar member with ducts decelerates directed upwards flow of gaseous cooling medium in central zone of conveyer. EFFECT: possibility for supplying cooling air to all segments of loops at uniform intervals, decelerated flow speed in central zone of conveyer where flow speed is lower than in terminal zones. 8 cl, 16 dwg _ ззчелрс пы с» РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (13) КО "”2 179 588 ^^ С2 5) МК’ С 210 9/573, 1/64, В 210 45/02 (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 99123436/02, 17.03.1998 (24) Дата начала действия патента: 17.03.1998 (30) Приоритет: 08.04.1997 Ц$ 08/838,512 (46) Дата публикации: 20.02.2002 (56) Ссылки: ЕР 0516502 А\Л, 02.12.1992. ЕР 0069616 А1,12.01.1983. ЕР 03592179 А, 21.03.1990. 4$ 4423856, 03.01.1984. ЕК 2291019, 10.09.1976. ЕР 0216434 АЛ, 01.04/1987. (85) Дата перевода заявки РСТ на национальную фазу: 09.11.1999 (86) Заявка РСТ: 0$ 98/05204 (17.03.1998) (87) Публикация РСТ: М/О 98/45487 (15.10.1998) (98) Адрес для переписки: 103735, Москва, ул. Ильинка 5/2, "Союзпатент", Ивановой О.Ф. (71) Заявитель: МОРГАН КОНСТРАКШН КОМПАНИ (0$) (72) Изобретатель: КИФЕР Брюс В. (Ц$), БРЕИН Филип Дх. (4$), КАИЦЕР Питер Л. (4$) (73) Патентообладатель: МОРГАН КОНСТРАКШН КОМПАНИ (1$) (74) Патентный поверенный: Иванова Ольга Филипповна (54) УСТРОЙСТВО И СПОСОБ ОХЛАЖДЕНИЯ ГОРЯЧЕКАТАНОГО СТАЛЬНОГО ПРУТКА (57) Изобретение относится к прокатным станам, в частности к усовершенствованию устройства и способа, ...

연속 소둔로 냉각대의 스트립 온도 제어방법

내용 없음.

一种生产不同屈服强度级别热镀锌dp980钢的方法

本发明涉及一种生产不同屈服强度级别热镀锌DP980钢的方法，包括板坯加热工序、热轧工序、酸轧工序、热镀锌工序和光整工序，制备530～610MPa、620～700MPa及710～790MPa三种屈服强度级别的热镀锌DP980钢产品。530～610MPa屈服强度级别DP980+Z钢产品，适用于要求良好耐蚀性、可成形性和抗冲撞性能，并且几何精度要求高的汽车安全零件制造；620～700MPa屈服强度级别DP980+Z钢产品适用于冷加工成形要求高的耐蚀性汽车防撞结构件和加强件制造；710～790MPa屈服强度级别DP980+Z钢产品适用于有扩孔、翻边级抗碰撞性能要求的耐蚀性汽车结构件和加强件制造。

Method and section for cooling of moving metal strip by fluid spraying

FIELD: process engineering. SUBSTANCE: invention relates to metallurgy, particularly, to continuous metal strip (B) cooling lines. Strip cooling is performed by spraying fluid or mix consisting of gas and fluid on to the strip. Cooling depends on parameters including coolant temperature and flow rate. In compliance with this process, one or more zones are defined wherein cooling parameters are such that local vapour film disappears from hot strip surface which causes the strip rewetting. Cooling parameter for such zones represents at least the coolant temperature used to conserve or re-cool said vapour film on strip surface resulted from film vaporization of coolant at contact with hot strip. EFFECT: higher efficiency. 13 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 541 233 C2 (51) МПК C21D 11/00 (2006.01) C21D 1/667 (2006.01) C21D 9/56 (2006.01) C21D 9/573 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2011133250/02, 07.01.2010 (24) Дата начала отсчета срока действия патента: 07.01.2010 (72) Автор(ы): КЛАВРУЛАС,Сирил (FR), МАРМОНЬЕ,Фредерик (FR) (73) Патентообладатель(и): ФИВ СТЭН (FR) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 20.02.2013 Бюл. № 5 R U 09.01.2009 FR 0900077 (45) Опубликовано: 10.02.2015 Бюл. № 4 531579 A1 ,15.10.1976 ; . RU 2144205 C1 , 10.01.2000. RU 2229922 C2 ,10.06.2004 . EA6413B1,29.12.2005. JP63125622A, 28.05.1988 . JP2000178658A,27.06.2000 . (86) Заявка PCT: IB 2010/050049 (07.01.2010) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.08.2011 (87) Публикация заявки PCT: 2 5 4 1 2 3 3 WO 2010/079452 (15.07.2010) R U 2 5 4 1 2 3 3 (56) Список документов, цитированных в отчете о поиске: JP 2003185501 A ,03.07.2003 ; . SU Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. С.Р.Абубакирову, рег.N 931 (54) СПОСОБ И СЕКЦИЯ ОХЛАЖДЕНИЯ ДВИЖУЩЕЙСЯ ...

热轧钢板的冷却装置及热轧钢板的冷却方法

本冷却装置在将对全部冷却区域在钢板输送方向上分割为多个且在宽度方向上分割为三个以上而得到的冷却区域设为分割冷却面时，针对每个分割冷却面具备冷却水喷嘴(23)和对从该冷却水喷嘴(23)喷射的冷却水与分割冷却面的碰撞和不碰撞进行切换的切换装置，还具备基于宽度方向温度分布来控制切换装置的动作的控制装置。冷却水喷嘴(23)在钢板输送方向观察时具有相对于全部冷却区域的垂线倾斜的喷射轴线(P)，该冷却水在与分割冷却面碰撞之后朝向与该冷却水喷嘴(23)在宽度方向上相反的一侧。

溶接用ル−プ状鋼線材の水冷方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

連続焼鈍炉における鋼帯冷却方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

鋼帯のロ−ル冷却方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

均一冷却方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

hot dip coated steel sheet

본 발명은 아연계 또는 알루미늄계 코팅으로 코팅된 용융도금 코팅된 강 시트의 제조 방법에 관한 것으로, 상기 방법은 특정 강 시트의 제공 단계, 재결정화 어닐링 단계 및 용융도금 코팅 단계를 포함하고, 또한 본 발명은 용융도금 코팅된 강 시트 및 상기 용융도금 코팅된 강 시트의 용도에 관한 것이다. The present invention relates to a method for producing a hot-dip coated steel sheet coated with a zinc-based or aluminum-based coating, the method comprising the steps of providing a specific steel sheet, recrystallization annealing and hot-dip coating, and The invention relates to a hot-dip coated steel sheet and to the use of said hot-dip coated steel sheet.

一种连退退火炉出口段结构及带钢出炉冷却工艺

本发明涉及退火炉领域，具体来说是一种连退退火炉出口段结构及带钢出炉冷却工艺，包括炉壳，在炉壳内设有炉辊，所述炉壳内设有二冷段风机。本发明公开了一种连退退火炉出口段结构，本发明主要是改变了退火炉出口段的冷却方式，把传统的水冷改成了风冷，本发明通过风冷，使得带钢表面没有低速度或检修停机高温高湿产生的氧化物，进而避免了设备污染；进而也就减少了清洗需要用的水液，所以能够节约大量的水(脱盐水)；并且，因为产品没有经过水淬冷却，所以采用上述结构生产的带钢不会产生黄色条纹缺陷，极大的提高了带钢品质。

Method and production equipment for manufacturing hot wide strip

본발명은 40 내지 70mm의 얇은 슬래브용 연속캐스팅시설, 균열로, 압연기 등으로 구성된 생산설비에서 열간 광폭 스트립을 제작하는 방법으로서, 연속캐스팅장치에서 나오는 얇은 슬래브의 배출온도가 950℃ 이상인 방법에 관한 것이다. 연속캐스팅장치와 균열로 사이에는 슬래브의 표면온도가 오스테나이트에서 페라이트/ 펄라이트로의 조직변태가 나타나도록 충분한 깊이에서 낮아진다. 설치된 냉각구간(1)은 수냉각 구간으로 되어 있고 복수개의 시동 및 정지가능한 냉각비임(4)로 구성되어 있다. The present invention relates to a method for producing hot wide strips in a production facility consisting of a continuous casting facility for a thin slab of 40 to 70 mm, a crack furnace, a rolling mill, etc., wherein the discharge temperature of the thin slab from the continuous casting device is 950 ° C. or more. will be. The surface temperature of the slab between the continuous casting device and the cracking furnace is lowered at a sufficient depth to reveal the tissue transformation from austenite to ferrite / pearlite. The installed cooling section 1 is a water cooling section and is composed of a plurality of start and stop cooling beams 4.

Hardening method of round bar material

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Cooling device for cooling plate-like or sheet-like metal sheet and cooling process

Die Erfindung betrifft eine Abkühl-Einrichtung zum Abkühlen von platten- oder bahnförmigem Blech aus Metall, umfassend mindestens eine erste Transportrolle (1a, 1b, 1c, 1d), mit einem antreibbaren drehbaren Tragrohr (3), welches mit Tragelementen (4) versehen ist, die eine Transportebene (T) zum Transport des Bleches (2) in Durchlaufrichtung (D) durch die Abkühl-Einrichtung bilden. Erfindungsgemäß weist das Tragrohr (3) Düsenöffnungen (8) auf. In dem Tragrohr ist ein nicht drehbarer Kanal (5) für ein erstes Kühlmittel ausgebildet, wobei der Kanal (5) an eine erste Kühlmittel-Zuführung (6) angeschlossen ist. Der Kanal weist mindestens eine Ausnehmung (7) auf, die von dem ersten Kühlmittel durchströmbar ist, um das erste Kühlmittel zu den Düsenöffnungen (8) zu leiten, mittels derer das erste Kühlmittel auf eine erste Seite (2a) des Bleches (2) über dessen Breite aufbringbar ist.Die Erfindung betrifft ferner ein Abkühl-Verfahren mit den Schritten:- Zuführen eines ersten Kühlmittels zu einem Kanal (5), welcher in dem Tragrohr (3) ausgebildet ist,- Leiten des ersten Kühlmittels durch Ausnehmungen (7) in dem Kanal (5) zu Düsenöffnungen (8) in dem Tragrohr und- Abkühlen des Bleches (2) mittels Aufbringen des ersten Kühlmittels auf eine erste Seite (2a) des Bleches (1) über dessen Breite. The invention relates to a cooling device for cooling plate-like or sheet-like sheet metal, comprising at least one first transport roller (1a, 1b, 1c, 1d), with a drivable rotatable support tube (3) which is provided with support elements (4) , which form a transport plane (T) for transporting the sheet (2) in the direction of passage (D) through the cooling device. According to the invention, the support tube (3) has nozzle openings (8). A non-rotatable channel (5) for a first coolant is formed in the support tube, the channel (5) being connected to a first coolant supply (6). The channel has at least one recess (7) through which the first coolant can flow in order to guide the first ...

Heat treatment system of metal strip

Apparatus of adjusting deformation of muffle

An apparatus for correcting muffle elongation in which an inlet plug is corrected in accordance with deformation of a muffle in a vertical annealing furnace. A muffle extension correcting device according to an embodiment of the present invention includes an inlet seal plug having an inlet chamber provided at an inner side thereof and an oil chamber provided at an end of the muffle to be submerged in oil, And a height adjusting unit for moving the inlet seal plug up and down so as to adjust the depth at which the end of the muffle is immersed in the oil.

线材的连续制造设备列

一种线材的连续制造设备列，其特征在于，顺序连接着热轧机、卷取装置、调整冷却带、集束装置、在线热处理炉；上述热轧机包括由将机械构造用碳素钢或合金钢坯热轧到所希望的直径的4轧钢机架以下的、轧钢机钢性40吨/mm以上的卷筒轧机构成且在输入侧设有水冷·回热带的精轧机，上述卷取装置卷取轧制后的线材并使之形成为环状，上述调整冷却带设置在上述卷取装置后面且由可切换的多个冷却或保热线构成，上述集束装置将冷却后的线材形成为线材卷地进行集束，上述在线热处理炉为隧道型且具有单位时间内处理线材卷数量的1/4～1/1的处理能力，将集束线材在线材卷的状态下进行慢冷却。

Method of producing high-strength steel part

FIELD: metallurgy.SUBSTANCE: invention describes a method of producing a high-strength steel part having the desired mechanical properties obtained using standard heat treatment, including a first standard treatment and a final standard treatment comprising at least overaging, method comprising a heat treatment step on equipment comprising at least an overaging device for which at least one operational mode can be set, final processing includes overaging, for which two parameters of final processing OAP1 and OAP2 depending on operating mode of the overaging device can be calculated, wherein the minimum OAP1 min and the maximum OAP2 max final processing parameters are determined in order to obtain the desired properties, at least one operational mode of the overaging device section is determined such that OAP1 ≥ OAP1 min and OAP2 ≤ OAP2 max, where steel part is steel part made on continuous line. Also disclosed is a method of making high-strength steel part, where steel part is a steel part, which is forged in a hot way.EFFECT: technical result consists in production of high-strength steel sheets having improved yield strength and ultimate strength.17 cl, 4 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 690 851 C2 (51) МПК C21D 9/00 (2006.01) C22C 38/00 (2006.01) C23C 2/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C21D 9/00 (2019.02); C22C 38/00 (2019.02); C23C 2/00 (2019.02) (21)(22) Заявка: 2017102687, 23.07.2015 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): АРСЕЛОРМИТТАЛ (LU) Дата регистрации: 06.06.2019 R U 23.07.2015 (72) Автор(ы): АРЛАЗАРОВ Артем (FR) (56) Список документов, цитированных в отчете о поиске: EP 2524970 A1, 21.11.2012. SU 30.07.2014 IB PCT/IB2014/002342 (43) Дата публикации заявки: 28.08.2018 Бюл. № 25 322377 A1, 30.11.1971. RU 2235792 C2, 10.09.2004. WO 2004022794 A1, 18.03.2004. WO 2013010968 A1, 24.01.2013. EP 2325346 A1, 25.05.2011. EP 2683839 ...

一种焊接性能优异的高强塑积q&p钢板及其制备方法

本发明公开一种焊接性能优异的高强塑积Q&P钢板及其制备方法，属于冷轧汽车用钢生产技术领域。该钢板的化学成分按质量百分数为：C：0.17～0.21％，Si：1.80～2.20％，Mn：2.10～2.40％，Nb：0.03～0.05％，Ti：0.008～0.020％，Als：0.025～0.045％，P≤0.020％，S≤0.0030％，余量为Fe和不可避免的残存杂质元素。制备方法包括炼钢、连铸、热轧、酸洗、冷轧、连续退火；本发明Q&P钢力学性能优异，屈服强度≥600MPa，抗拉强度≥1000MPa，延伸率≥20％，强塑积≥22GPa％。本发明采用较低的配分温度获得高强塑积Q&P钢，对工艺装备要求较低，适合于现有连续退火生产线生产。

Method of continuous thermal treating of sheet low-carbon steel

Device for amending shape of strip in bright annealing furnace

본 발명의 목적은 광휘소둔로 냉각대를 통과하는 스트립이 급냉각에 의한 냉각변형되는 것을 방지하고, 스트립 형상 불량시에도 교정이 가능하게 하여 스트립의 표면 결함 발생을 방지할 수 있도록 된 광휘소둔로의 스트립 형상 교정장치를 제공함에 있다. An object of the present invention is to prevent the cold deformation of the strip passing through the bright annealing cooling zone by the rapid cooling, and to correct even when the strip shape is poor, the bright annealing furnace to prevent the occurrence of surface defects of the strip To provide a strip shape correction apparatus of the. 이에 본 발명은 스트립이 통과하는 덕트 양 측면에 설치되는 냉각용 라디에이터와, 덕트 내부로 연결되어 분위기가스를 라디에이터로 유입시키고 냉각된 분위기가스를 덕트로 투입시키기 위한 흡입관과 투입관, 구동팬을 포함하는 광휘소둔로의 냉각대에 있어서, 상기 냉각대 덕트 내측에 설치되고 전면에는 투입관을 통해 유입되는 냉각 분위기가스를 분산시키기 위한 노즐구멍이 일정간격을 두고 상하좌우로로 배열형성된 노즐판과, 노즐판 내부에 열을 따라 배열되어 각각 상하로 슬라이딩가능하게 설치되고 표면에는 노즐판의 노즐구멍과 동일한 위치에 유통홀이 형성된 차단판, 차단판을 상하로 이동시키기 위한 구동수단을 포함하는 것을 특징으로 하는 광휘소둔로의 스트립 형상 교정장치를 제공한다. Accordingly, the present invention includes a cooling radiator installed on both sides of the duct through which the strip passes, and a suction pipe, an input pipe, and a driving fan connected to the inside of the duct to introduce the atmosphere gas into the radiator and to introduce the cooled atmosphere gas into the duct. In the cooling zone of the bright annealing furnace, the nozzle plate which is installed inside the cooling duct duct and the nozzle hole for dispersing the cooling atmosphere gas flowing through the inlet pipe in the front and rear spaced at regular intervals, Arranged along the rows inside the nozzle plate to be slidable up and down respectively, the surface includes a blocking plate formed with a distribution hole in the same position as the nozzle hole of the nozzle plate, the drive means for moving the blocking plate up and down Provided is a strip shape correction apparatus for a bright annealing furnace.

The cooling device and cooling means of hot rolled steel plate

一种冷却装置，其具有朝向在热精轧机中由轧制机架刚刚轧制了之后的热轧钢板的上下表面中的一者或两者喷射冷却水的多个喷嘴，喷嘴设于上下的引导件中，或以与该引导件相邻的方式设于该引导件的下游侧，喷嘴喷射距离根据喷嘴在轧制方向上的位置而变化，其中，处于喷嘴喷射距离最大的位置的喷嘴的喷射角度比处于喷嘴喷射距离最小的位置的喷嘴的喷射角度小，随着喷嘴喷射距离变大，喷嘴的喷射角度相同或变小。

Steel wire rod enabling omission of softening heat treatment and method of manufacturing the same

본 발명은 연질화 열처리의 생략이 가능한 선재 및 그 제조방법에 관한 것이다. 본 발명의 일 실시형태는 중량%로, C: 0.2~0.45%, Si: 0.02~0.4%, Mn: 0.3~1.5%, Cr: 0.01~1.5%, Al: 0.02~0.05%, Mo: 0.01~0.5%, N: 0.01% 이하, 잔부 Fe 및 기타 불가피한 불순물을 포함하고, 미세조직은 주상이 초석 페라이트+펄라이트인 복합조직이며, 베이나이트 또는 마르텐사이트 중 1종 이상을 10면적% 이하로 포함(0%를 포함)하고, 상기 펄라이트의 콜로니 평균 크기는 5㎛ 이하인 연질화 열처리의 생략이 가능한 선재 및 그 제조방법을 제공한다. The present invention relates to a wire rod capable of omitting the softening heat treatment and a manufacturing method thereof. In one embodiment of the present invention, by weight, C: 0.2 to 0.45%, Si: 0.02 to 0.4%, Mn: 0.3 to 1.5%, Cr: 0.01 to 1.5%, Al: 0.02 to 0.05%, Mo: 0.01 to 0.5%, N: 0.01% or less, the balance contains Fe and other inevitable impurities, and the microstructure is a composite structure in which the main phase is cornerstone ferrite + pearlite, and contains at least one of bainite or martensite in 10 area% or less ( Provides a wire rod that can omit the softening heat treatment having an average colony size of 5 µm or less and a manufacturing method thereof.

Heating furnace, cooler and roller hearth type annealing furnace with transforming protrusion

A heating furnace, a cooling furnace and a roller hearth type annealing furnace having air current-transforming protrusions, which maximize thermal efficiency by allowing internal air to flow smoothly, thereby improving heat transfer, are provided. A heating furnace(100) having air current-transforming protrusions comprises: a heating furnace housing(110) having a space inside; regenerative burners(120) installed in upper and lower parts within the heating furnace housing to emit heat; a heating furnace bell(130) formed between upper and lower regenerative burners(121,122) within the heating furnace housing to transfer heat to a heating object(10a); and at least one heated air circulating part(140) formed in an upper part of the heating furnace bell to circulate air in the heating furnace housing, wherein first air current-transforming protrusions(133) are formed on an inner side of a heating furnace bell. The heating furnace further comprises vortex flow preventing guides(150) formed in upper and lower corners within the heating furnace housing.

热轧钢板的冷却方法和冷却装置

在将热轧钢板在输送辊上所占的区域设为钢板输送区域时，在钢板输送区域的宽度方向侧方的两侧配置有一对喷射喷嘴，且该喷射喷嘴对沿着热轧钢板的输送方向排列配置有多对，从所述喷射喷嘴沿着钢板输送区域的宽度方向向钢板输送区域喷射冷却水而对热轧钢板进行冷却。对于从所述喷射喷嘴喷射的冷却水在钢板输送区域的碰撞区域而言，喷射方向的远侧端部位于钢板输送区域的端部，近侧端部位于钢板输送区域的内侧。在所述喷射喷嘴对处，两个所述碰撞区域的近侧端部沿着宽度方向对齐而形成汇合部。

Method of operating cooling sections with determination of valve characteristics and structures related therewith

FIELD: process engineering. SUBSTANCE: cooling section 1 has multiple coolant outlets 2 to feed coolant in normal operating conditions to rolled material 3 fed there through. Said coolant is fed in required amount to required point and at due time by feeding coolant 4 to said outlets 2 via feed channels 5 and main pipeline 6 shared by all feed channels 5. Said channels 5 are equipped with valves 7 to stop coolant fed to outlets 2 and to initiate it. Said valves are automatically driven by appropriate device 8 to feed coolant in compliance with process chart. Said device allows for particular operating characteristic of said valve. In testing said cooling section, said specific characteristics is checked up by opening and closing valve 7 to define time variation in coolant flow by appropriate meter 12 arranged main pipeline 6. EFFECT: higher accuracy of characteristics. 13 cl, 11 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 479 369 (13) C2 (51) МПК B21B 45/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010116413/02, 02.09.2008 (24) Дата начала отсчета срока действия патента: 02.09.2008 (73) Патентообладатель(и): СИМЕНС АКЦИЕНГЕЗЕЛЛЬШАФТ (DE) (43) Дата публикации заявки: 10.11.2011 Бюл. № 31 2 4 7 9 3 6 9 (45) Опубликовано: 20.04.2013 Бюл. № 11 (56) Список документов, цитированных в отчете о поиске: US 4932232 A, 12.06.1990. SU 1297960 A1, 23.03.1987. RU 2067904 С1, 20.10.1996. ЕР 0280259 А2, 31.08.1988. 2 4 7 9 3 6 9 R U (86) Заявка PCT: EP 2008/061551 (02.09.2008) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.04.2010 (87) Публикация заявки РСТ: WO 2009/043668 (09.04.2009) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ РАБОТЫ СЕКЦИИ ОХЛАЖДЕНИЯ С ЦЕНТРАЛИЗОВАННЫМ ОПРЕДЕЛЕНИЕМ ХАРАКТЕРИСТИК КЛАПАНОВ И ОБЪЕКТЫ, СООТВЕТСТВУЮЩИЕ ЕМУ (57) Реферат: Изобретение предназначено для повышения точности ...

Apparatus for prevent trouble of strip in kiln

본 발명은 소둔로 스트립의 트러블 방지장치에 관한 것으로, 본 발명은 롤의 각 하부에는 강판재로 롤실을 설치하며, 이 롤실의 내부에 설치된 가스 제트 챔버(101)를 포함하는 소둔로에서, 허스롤의 냉각을 통해 상기 소둔로 내부에 진행되는 스트립의 트러블을 방지하는 장치에 있어서, HN가스를 냉각하기 위하여 쿨러(305); 제어에 따른 속도로 회전하여, 상기 쿨러(305)에 의한 냉각 가스를 송풍하는 송풍팬(304); 상기 송풍팬(304)에서 부터 병렬로 상기 가스제트 챔버(101)내부까지 연장 설치되어, 상기 송풍팬(304)에 의한 냉각 가스를 상기 가스제트 챔버(101)내부로 공급하기 위한 광폭 및 협폭 냉각가스 배관(201.202); 상기 광폭 및 협폭 냉각가스 배관(201.202)에 각각 설치하여, 스프립의 폭에 따라 개/폐 조절되는 광폭 및 협폭 가스조절밸브(302,303); 롤실(305)의 맨후단롤에 좌측에지-센서-우측에지 방향으로 복수의 센서를 설치한 측온롤(401); 상기 측온롤(401)의 검출치를 이상 판별 기준치를 비교하여 측온롤의 이상여부를 판단하고, 정상시에는 롤온도 모드를 수행하여 상기 측온롤(401)의 센터 롤온도 및 에지 롤온도와의 온도차에 따라 해당 밸브의 오픈, 클로즈를 제어하며, 반면 이상 발생시에는 로온 모드를 수행하여 사전에 설정된 압력 기준값을 제공하는 온도 제어기(TC); 롤 압력을 측정하는 압력 검출센서(402); 및 상기 온도 제어기로부터의 압력 기준값과 상기 압력 검출센서(402)의 압력 검출치와의 압력차에 따라 상기 송풍팬(304)을 제어하여 송풍량을 조절하는 압력제어기(PC)를 구비함을 요지로 한다. The present invention relates to an apparatus for preventing trouble of annealing furnace strips. The present invention provides a roll chamber with a steel plate material at each lower part of a roll, and in an annealing furnace including a gas jet chamber 101 installed inside the roll chamber, a hearth. An apparatus for preventing trouble of a strip which is advanced in the annealing furnace through cooling of a roll, the apparatus comprising: a cooler (305) for cooling HN gas; A blowing fan 304 which rotates at a speed according to a control and blows cooling gas by the cooler 305; Wide and narrow cooling is provided extending from the blowing fan 304 to the inside of the gas jet chamber 101 in parallel to supply the cooling gas by the blowing fan 304 to the inside of the gas jet chamber 101. Gas piping 201.202; Wide and narrow gas control valves 302 and 303 installed in the wide and narrow cooling gas pipes 201 and 202, respectively, which are open / closed according to the width of the sprip; A temperature measuring roll 401 in which a plurality of sensors are provided on a left edge-sensor-right edge direction of the last end roll of the roll chamber 305 ...

Heating furnace, cooler and roller hearth type annealing furnace with a preventing vortex guide

A reheating furnace, a cooling furnace and a roller hearth type annealing furnace with vortex preventing guides, which can reduce the energy consumed in heating and cooling, and can reduce the time consumed in heating of a heating object or cooling of a cooling object, are provided. A reheating furnace(100) with vortex preventing guides(150) comprises: a reheating furnace housing(110) in which a predetermined space is formed; regenerative burners(120) installed in an upper part and a lower part in the reheating furnace housing to emit heat; a reheating furnace bell(130) installed between an upper regenerative burner(121) and a lower regenerative burner(122) in the reheating furnace housing to transfer heat to a heating object(10a); and at least one heated air circulating part(140) installed in an upper part of the reheating furnace bell to circulate air in the reheating furnace housing, wherein the vortex preventing guides are installed at upper and lower corners inside the reheating furnace housing. The reheating furnace bell includes a left heating wall surface(131) and a right heating wall surface(132). The heated air circulating part includes a circular air exhaust port(144), a heated air circulating fan(142), and a semicircular cross-sectional shaped dispersing cap(146).

Method of continuous roasting of cold-rolled steel strip made of low-carbon steel and device for effecting same

{.Способ непрерывного отжига холоднокатаной стальной полосы иэ малоуглеродистой стали, включающий нагрев Bbiffie температуры рекристаллизации , охлаждение путем контакта с водоохлаждаемыми роликами до температуры перестариваажего отпуска, ведержку и окончательное охлаждение, отличающийс   тем, что, с целые {ющени  технологии при сохранении посто нной скорости движени  полосы, при охлаждении до тем (Л пературы перестаривакадего отпуска с скорость охлаждени  регулируют путем изменени  площади контакта между полосой и водоохлаждаемьв4И роликами. 00 со со О)

Patent JPS586766B2

Method and apparatus for cooling steel belt at continuous annealing

Cooling method of bright continuous annealing furnace

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Rolling material cooler in continuous hot rolling line

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Cooling method of metallic strip by cooling roll

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

DEVICE FOR PRODUCING ANNEALED STEEL VARIETIES AND METHOD FOR PRODUCING MENTIONED STEEL VARIETIES

1. Устройство для производства отожженных сортов стали, включающее в себя:а. размоточное устройство (12) для разматывания стального штрипса (1);b. зону (2) нагрева, включающую в себя:секцию нагрева, в которой предусмотрена:А. первая нагревательная установка (4), включающая в себя горелки с радиационными трубами или индукционную печь для нагрева стального штрипса до температуры в промежутке от 400 до 600°С иВ. вторая нагревательная установка (5), включающая в себя одну или более индукционных печей поперечного тока для дополнительного нагрева стального штрипса до температуры отжига в промежутке от 500°С вплоть до примерно 1000°С;стадию выдержки для выдержки стального штрипса на время самое большее 120 секунд;стадию (6) охлаждения, включающую в себя зону медленного охлаждения, зону быстрого охлаждения и третью зону охлаждения, причем зона медленного охлаждения служит для охлаждения стального штрипса от температуры отжига до температуры начала быстрого охлаждения, и при этом зона быстрого охлаждения служит для быстрого охлаждения стального штрипса от температуры начала быстрого охлаждения до температуры остановки охлаждения, примерно 300°С, и при этом третья зона охлаждения служит для охлаждения стального штрипса от температуры остановки второго охлаждения до температуры между температурой окружающего воздуха и 100°С;c. необязательную зону (7) повторного нагрева;d. необязательную зону (8) отжига с заданными свойствами для локальной термической обработки одного или более участков поверхностей в продольном направлении штрипса;е. зону (9) заключительного охлаждения;f. зону (10) нанесения покрытия, включающую в себя:необязательную РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C21D 9/60 (13) 2014 105 584 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014105584/02, 15.07.2012 (71) Заявитель(и): ТАТА СТИЛ ЭЙМЕЙДЕН БВ (NL), ТАТА СТИЛ НЕДЕРЛАНД ТЕКНОЛОДЖИ БВ (NL) Приоритет(ы): (30) Конвенционный приоритет: 15.07.2011 EP ...

Heat treatment of metallic slab

(57)【要約】 （修正有） 【課題】走行シートメタルを酸化させず、また優れた平 坦性と完全な表面仕上げを保証し、一方で上記の利点を 有する従来技術の勾配よりも著しく高い勾配、特に、１ ００℃／ｓ程度の勾配の獲得をなお可能にするような方 法を提供する。 【解決手段】金属片が、少なくとも１つの部分の中に、 または２つの部分の間に配置された少なくとも１つの部 分的または全体的な隔離装置（１４）を通過し、雰囲気 の熱力学特性の区別を可能にするために、水素またはヘ リウム成分が５％、より好ましくは５％を超えるような 混合気体から成る雰囲気の組成を調整することによっ て、異なった雰囲気を有する少なくとも他の１つの隣接 部分と比較して金属片上の異なった熱移動特性を確保す る。

High-strength galvanized steel sheet and manufacturing method thereof

수소 취화가 우려되는 초고강도 도금 강판에 있어서, 수요가 높은 고항복 강도를 달성한 재질과 함께, 도금 외관이나 소재의 내수소 취성이 우수하여, 건재나 자동차의 내충돌 부품에 적합한 높은 항복 강도를 갖는 고강도 용융 아연 도금 강판 및 그의 제조 방법을 제공한다. 특정의 성분 조성과, 마르텐사이트 및 베이나이트를 70％ 이상(100％를 포함함), 페라이트를 20％ 미만(0％를 포함함), 잔류 오스테나이트를 5％ 미만(0％를 포함함) 포함하는 강 조직을 갖고, 강 중의 확산성 수소량이 0.20질량ppm 이하인 강판과, 당해 강판의 표면에, Fe 함유량이 질량％로 8∼15％이고, 편면당의 도금 부착량이 20∼120g/㎡인 아연 도금층을 구비하고, 아연 도금층에 포함되는 Mn 산화물량이 0.050g/㎡ 이하이고, 인장 강도 1100㎫ 이상, 항복비 0.85 이상인 고강도 아연 도금 강판으로 한다. In the ultra-high-strength plated steel sheet concerned about hydrogen embrittlement, along with a material that achieves high yield strength with high demand, it has excellent hydrogen embrittlement resistance of the plating appearance and material, providing high yield strength suitable for collision-resistant parts of building materials and automobiles. It provides a high-strength hot-dip galvanized steel sheet and a manufacturing method thereof. Specific component composition and content of martensite and bainite of 70% or more (including 100%), less than 20% of ferrite (including 0%), and less than 5% of retained austenite (including 0%) A steel sheet having a steel structure containing A high-strength galvanized steel sheet comprising a galvanized layer, wherein the amount of Mn oxide contained in the galvanized layer is 0.050 g/m 2 or less, a tensile strength of 1100 MPa or more, and a yield ratio of 0.85 or more.