公开(公告)号：EP4365327A1

公开(公告)日：2024-05-08

申请号：EP22832094.1

申请日：2022-06-29

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： CHEN, Mengxiao ,  ZHONG, Yong ,  WANG, Li ,  XIE, Shuang

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C33/04 ,  C21D8/02 ,  C21D1/26 ,  C21D11/00 ,  C23C2/06 ,  C23C2/40 ,  C23F17/00

CPC分类号： C23F17/00 ,  C22C38/04 ,  C23C2/06 ,  C21D11/00 ,  C22C38/02 ,  C21D1/26 ,  C22C38/06 ,  C23C2/40 ,  C22C33/04 ,  C21D8/02

摘要： Disclosed in the present invention are TRIP steel and a preparation method therefor, a cold-rolled steel sheet, and a hot-dip galvanized steel sheet, wherein the TRIP steel comprises the following chemical components, in percentages by mass: C: 0.15-0.3%, Si: 0.6-1.0%, Mn: 1.7-2.5%, Al: 0.5-0.9%, P ≤ 0.01%, S ≤ 0.01%, N ≤ 0.007%, and Fe ≥ 90%. The TRIP steel of the present invention is based on carbon-silicon-manganese steel. By means of optimizing the proportions of carbon, silicon, manganese and aluminum, and replacing Si in traditional TRIP steel with a part of the Al, the effects of inhibiting carbide precipitation and stabilizing residual austenite can be achieved so as to ensure the mechanical properties of the TRIP steel, and the surface quality and plateability of the steel sheet can also be improved.

公开(公告)号：EP3409797A1

公开(公告)日：2018-12-05

申请号：EP16888093.8

申请日：2016-11-02

申请人： JFE Steel Corporation

发明人： OGASAHARA, Tomoyoshi ,  YAMADA, Goki

IPC分类号： C21D11/00 ,  C21D9/56

CPC分类号： C21D9/56 ,  C21D1/08 ,  C21D1/52 ,  C21D11/00 ,  F27D21/0014 ,  F27D2019/0003 ,  F27D2019/004

摘要： In a steel sheet temperature control device 1 according to an embodiment of the present invention, a state variable/disturbance estimation unit 15 estimates values of a state variable and a temperature disturbance variable of a control model at the same time; a furnace temperature change amount calculation unit 16 calculates a furnace temperature change amount of each heating zone under a constraint condition such that square sum of a deviation between the target value and the actual value of the temperature of a steel sheet at an outlet side of a heating furnace becomes minimum, by using the values of the state variable and the temperature disturbance variable of the control model; and a furnace temperature control unit 17 controls a fuel flow rate used in each heating zone to achieve the calculated furnace temperature change amount.

公开(公告)号：EP1888800B1

公开(公告)日：2018-11-07

申请号：EP06732897.1

申请日：2006-05-03

申请人： POSCO

发明人： PARK, Man-Young, c/o Posco ,  CHUNG, Jin-Hee, c/o Posco ,  CHO, Noi-Ha, c/o Posco ,  YOON, Jeong-Bong, c/o Posco ,  CHIN, Kwang-Geun, c/o Posco ,  KIM, Ho-Seok, c/o Posco ,  KIM, Sung-Il, c/o Posco ,  HAN, Sang-Ho, c/o Posco

IPC分类号： C22C38/00

CPC分类号： C22C38/60 ,  C21D8/04 ,  C21D9/46 ,  C21D11/00 ,  C22C38/002 ,  C22C38/004 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16

摘要： Disclosed herein is a Nb-Ti composite IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 µm or less are distributed. The distribution of fine precipitates in the Nb-Ti composite IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipitates allow the formation of minute crystal grains. As a result, dissolved carbon is present in a larger amount in the crystal grain boundaries than within the crystal grains, which is advantageous in terms of room-temperature non-aging properties and bake handenability.

公开(公告)号：EP3384260A1

公开(公告)日：2018-10-10

申请号：EP16801148.4

申请日：2016-11-04

申请人： SMS Group GmbH

发明人： HEIMANN, Thomas ,  OUDEHINKEN, Heinz-Jürgen ,  HASSEL, Christoph

IPC分类号： G01K7/42 ,  B21B37/74 ,  B22D11/22

CPC分类号： B21B37/74 ,  B21B1/22 ,  B21B2001/225 ,  B21B2261/21 ,  B22D11/1213 ,  B22D11/22 ,  B22D27/04 ,  C21D1/26 ,  C21D11/00 ,  G01K7/427 ,  G01K2213/00

摘要： The invention relates to a method for the open-loop and/or closed-loop control of a heating of a cast or rolled metal product, comprising the following steps: determining the total enthalpy of the metal product from a total of the free molar enthalpies (Gibbs free energy) of all phases and/or phase fractions currently present in the metal product; determining a temperature distribution within the metal product by means of a dynamic temperature calculation model by using the determined total enthalpy; and open-loop and/or closed-loop controlling of the heating of the metal product according to at least one initial variable of the temperature calculation model.

公开(公告)号：EP2171104B9

公开(公告)日：2018-08-29

申请号：EP08718045.1

申请日：2008-03-19

申请人： Muhr und Bender KG

发明人： WU, Hai ,  HOL, Camile, Wilbert, José ,  VAN POPTA, Pieter, Jacob ,  VERLOOP, Willem, Cornelis

IPC分类号： C21D9/56 ,  C21D9/60 ,  C21D9/573 ,  C21D1/42 ,  C21D11/00

CPC分类号： C21D9/56 ,  C21D1/42 ,  C21D9/573 ,  C21D9/60 ,  C21D11/00 ,  Y02P10/253

摘要： A method for annealing a strip of steel having a variable thickness in its length direction with at least thicker and thinner sections, wherein the strip has been cold rolled to form the thicker and thinner sections, one thicker and one thinner section having a length of at most a few meter. The annealing is performed by continuous annealing.

公开(公告)号：EP3358023A1

公开(公告)日：2018-08-08

申请号：EP16850759.8

申请日：2016-06-20

申请人： Hitachi Metals, Ltd.

发明人： HIRAMOTO, Atsuhiro ,  YASUI, Atsushi

IPC分类号： C21D11/00 ,  C21D1/18 ,  C22C38/00 ,  C22C38/06

CPC分类号： C21D11/005 ,  C21D1/18 ,  C21D1/185 ,  C21D11/00 ,  C22C38/00 ,  C22C38/06 ,  Y02P90/30

摘要： Provided are a method for deriving a cooling time when quenching a steel material, a method for quenching a steel material and a method for quenching and tempering a steel material. The method for deriving a cooling time comprises: step A of cooling a test specimen heated to a cooling initiation temperature Ts under a cooling condition C and measuring the cooling time t until the temperature of a center portion of the test specimen reaches a cooling termination temperature Te; step B of determining a function f which is defined by t = f(V/S) and which is satisfied by data including the volume V, the surface area S and the cooling time t of the test specimen obtained in step A; and step C of substituting the volume V 1 and the surface area S 1 of the shape F 1 of a steel material to be actually quenched in the relational expression t = f(V/S), and calculating a cooling time t 1 . The method for quenching a steel material comprises: actually heating the steel material to be quenched to the cooling initiation temperature Ts; cooling only for the cooling time t 1 under the cooling condition C; and then stopping cooling under the cooling condition C. The method for quenching and tempering a steel material comprises tempering the steel material quenched by this method.

公开(公告)号：EP3346800A4

公开(公告)日：2018-07-11

申请号：EP16840868

申请日：2016-04-28

申请人： GH ELECTROTERMIA S A

发明人： MORATALLA MARTÍNEZ PEDRO

IPC分类号： H05B6/40 ,  C21D1/10 ,  C21D1/42 ,  C21D9/40 ,  C21D11/00 ,  H05B6/10 ,  H05B6/36 ,  H05B6/44

CPC分类号： C21D9/40 ,  C21D1/10 ,  C21D1/18 ,  C21D1/42 ,  C21D1/667 ,  C21D11/00 ,  C21D11/005 ,  C21D2211/001 ,  C21D2221/00 ,  C21D2221/10 ,  F27D2099/0015 ,  H05B6/101 ,  H05B6/36 ,  H05B6/40 ,  H05B6/44 ,  Y02P10/253

摘要： System and method for induction hardening of metal rings, which comprises: two heads, each of which is attached to an induction medium; a system for vertical approximation of the two induction media to the metal ring; a system for horizontal approximation of the induction media to walls of an internal surface of the metal ring, and an oscillating circuit, where the system is configured so that: the system of vertical approximation displaces simultaneously in a vertical direction the two induction media until they are introduced into the metal ring; the system of horizontal approximation separates the two induction media from each other in a horizontal direction to bring each induction medium closer to the walls of the inner surface of the metal ring to heat it for a pre-established time, and to displace vertically the two induction media simultaneously until they reach a shower position to obtain the hardening of the metal ring.

公开(公告)号：EP2497839B1

公开(公告)日：2018-04-11

申请号：EP12157377.8

申请日：2012-02-28

申请人： SOL S.p.A.

发明人： Gandola, Andrea

IPC分类号： C21D1/06 ,  C21D1/76 ,  C21D9/00 ,  C21D9/32 ,  C21D11/00 ,  C23C8/18 ,  C23C8/22 ,  C23C8/26 ,  C23C8/32 ,  C23C8/34

CPC分类号： C21D1/06 ,  C21D1/763 ,  C21D9/0043 ,  C21D9/0068 ,  C21D9/32 ,  C21D11/00 ,  C23C8/34 ,  C23C8/80 ,  Y02P10/122

摘要： A process for treating a carbon steel and an apparatus for carrying out the process.

公开(公告)号：EP2522442A4

公开(公告)日：2018-03-21

申请号：EP11731814

申请日：2011-01-06

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： OKADA NOBUHIRO ,  TOMIZAWA ATSUSHI ,  SHIMADA NAOAKI

IPC分类号： B21D7/16 ,  B21D7/12 ,  C21D1/42 ,  C21D9/08

CPC分类号： C21D9/08 ,  B21D7/12 ,  B21D7/16 ,  C21D1/42 ,  C21D9/60 ,  C21D11/00 ,  Y02P10/253

摘要： A bent member having excellent dimensional accuracy is manufactured by stably forming a high temperature portion uniformly in the circumferential direction of a steel tube and in a narrow region in the axial direction of the steel tube using a manufacturing apparatus of Patent Document 1. A bent member is manufactured by supporting a steel tube 1 at a first position while feeding it, performing induction heating of the steel tube at a second position B with an induction heating coil 14, cooling the steel tube 1 at a third position C to form a high temperature portion 1a which moves in the axial direction of the steel tube 1, and three-dimensionally varying the position of a gripping mechanism 15 for the steel tube 1 in a region D to apply a bending moment to the high temperature portion 1a. When the wall thickness of the steel tube 1 is at most 2.0 mm, the feed speed V of the steel tube 1 is made 5 - 150 mm/sec, and an alternating current at 5 - 100 kHz is supplied to an induction heating coil 14 having 1 winding. When the wall thickness of the steel tube 1 is greater than 2.0 mm and at most 3.0 mm, an induction heating coil 14 having 2 windings is used, and the current frequency f (kHz) of the alternating current supplied to the induction heating coil 14 and the feed speed V (mm/sec) of the steel tube 1 are adjusted so as to satisfy f

公开(公告)号：EP3245307A1

公开(公告)日：2017-11-22

申请号：EP16700815.0

申请日：2016-01-15

申请人： Hardmesch AB

发明人： SVENSSON, Christer

IPC分类号： C21D11/00 ,  C21D8/04

CPC分类号： C21D1/673 ,  C21D1/38 ,  C21D1/42 ,  C21D8/0494 ,  C21D11/00 ,  C21D2211/008 ,  C21D2221/00 ,  C21D2261/00 ,  Y02P10/253

摘要： A method and system for selective heat treatment of a sheet metal is provided.