公开(公告)号：US20220347797A1

公开(公告)日：2022-11-03

申请号：US17868040

申请日：2022-07-19

申请人： ArcelorMittal

发明人： Laurent Cretteur ,  Qingdong Yin ,  Francis Schmit ,  Wolfram Ehling

IPC分类号： B23K31/02 ,  B23K26/32 ,  B23K26/60 ,  B23K35/30 ,  B23K35/38 ,  B23K35/02 ,  B32B15/01 ,  C21D9/48 ,  C21D9/50 ,  C21D1/673 ,  C22C38/04 ,  C22C38/18 ,  C23C28/02

摘要： A welded steel part with a very high mechanical strength is provided. The welded steel part is obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet. The at least one first and second sheets including, at least in part, a steel substrate and a pre-coating which includes an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy. A method for the fabrication of a welded steel part and the fabrication of structural or safety parts for automotive vehicles are also provided.

公开(公告)号：US11426820B2

公开(公告)日：2022-08-30

申请号：US15637928

申请日：2017-06-29

申请人： ARCELORMITTAL

发明人： Laurent Cretteur ,  Qingdong Yin ,  Francis Schmit ,  Wolfram Ehling

IPC分类号： C21D9/48 ,  B23K31/02 ,  B23K26/32 ,  B23K26/60 ,  B23K35/30 ,  B23K35/38 ,  B23K35/02 ,  B32B15/01 ,  C21D9/50 ,  C21D1/673 ,  C22C38/04 ,  C22C38/18 ,  C23C28/02 ,  B23K101/34 ,  B23K103/08 ,  B23K103/00

摘要： A welded steel part with a very high mechanical strength is provided. The welded steel part is obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet. The at least one first and second sheets including, at least in part, a steel substrate and a pre-coating which includes an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy. A method for the fabrication of a welded steel part and the fabrication of structural or safety parts for automotive vehicles are also provided.

公开(公告)号：US20220176434A1

公开(公告)日：2022-06-09

申请号：US17594664

申请日：2020-05-06

申请人： MAGNA INTERNATIONAL INC.

发明人： Cangji SHI ,  Eric DENIJS ,  Pascal CHAREST

IPC分类号： B21D22/02 ,  C21D1/25 ,  C21D1/42 ,  C21D1/673 ,  C21D7/13 ,  C21D8/04 ,  C21D9/48 ,  C21D11/00

摘要： A system for producing components by hot forming includes a conductive post-furnace heat station, a furnace, a computer system, and a press. The computer system comprises one or more physical processors operatively connected with the furnace in and the conductive post-furnace heat station. The one or more physical processors being programmed with computer program instructions which, when executed cause the computer system to control the furnace to heat the blank to a temperature that is below AC3 temperature; and control the conductive post-furnace heat station to heat a portion of the heated blank to a temperature above the AC3 temperature by thermal conduction. The press is constructed and arranged to receive the post-heated blank from the post-furnace heat station and to form the post-heated blank into the shape of the component.

公开(公告)号：US11261502B2

公开(公告)日：2022-03-01

申请号：US17253439

申请日：2019-06-19

申请人： Gestamp Hardtech AB

发明人： Mats Olsson

IPC分类号： C21D1/04 ,  B06B1/20 ,  C21D1/09 ,  C21D1/84 ,  C21D9/00 ,  C21D9/48 ,  F28F3/02 ,  F28F13/10

摘要： The invention relates to an apparatus (1) for cooling an automobile component (20) by means of a gas, the apparatus comprising a cooling box (11) with a re-closeable opening (12) for receiving an automobile component (20) to be cooled, wherein at least one heat sink (13) is provided inside the cooling box (11) for cooling of the gas, and wherein the apparatus (10) includes at least one infra sound pulsator (2, 3) arranged to provide an infra sound into said cooling box (11) to improve heat exchange of the gas both with a cooling surface of the at least one heat sink (13), and with the automobile component (20). The invention also relates to a process for cooling an automobile component in such an apparatus.

公开(公告)号：US20220033929A1

公开(公告)日：2022-02-03

申请号：US17298782

申请日：2019-12-02

申请人： POSCO

发明人： Seong-Woo Kim ,  Jin-Keun Oh ,  Sang-Heon Kim ,  Sang-Bin Han

IPC分类号： C21D9/48 ,  B32B15/01 ,  C21D8/04 ,  C21D6/00 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C22C38/32 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

摘要： The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 μm or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.

公开(公告)号：US20210340643A1

公开(公告)日：2021-11-04

申请号：US17378898

申请日：2021-07-19

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Eiichi OTA ,  Yasuhiro Yogo ,  Tomoaki Ihara

IPC分类号： C21D9/48 ,  C21D1/22 ,  B21D22/20 ,  B21D22/02 ,  C21D1/673

摘要： A hot-press molding method of the present disclosure includes a first heating process in which a steel plate is heated and the entire steel plate becomes austenite, a first cooling process in which a cooling rate of the steel plate after the first heating process is partially changed, a first region which is a part of the steel plate is transformed into martensite, and a second region other than the first region remains as austenite, a second heating process in which the entire steel plate is reheated and the first region becomes tempered martensite, and a second cooling process in which the entire steel plate after the second heating process is cooled. At least one of the first cooling process and the second cooling process is performed during a molding process in which the steel plate is press-molded on a molding die.

公开(公告)号：US11060157B2

公开(公告)日：2021-07-13

申请号：US16087919

申请日：2017-03-17

申请人： JFE Steel Corporation

发明人： Noriaki Kohsaka ,  Yoshimasa Funakawa

IPC分类号： C21D8/02 ,  C23C2/06 ,  C23C2/40 ,  C21D9/46 ,  C22C38/60 ,  C21D7/02 ,  C21D7/13 ,  C21D1/26 ,  C21D6/00 ,  C21D8/04 ,  C21D1/76 ,  C23C2/02 ,  C21D9/48 ,  C23C2/28 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/42 ,  C22C38/44

摘要： Provided are coated steel sheets, production methods therefor, and so forth, the coated steel sheets having a tensile strength of 440 MPa or more, good formability, and good aging resistance. A steel sheet of the present invention includes a specific component composition and a steel microstructure having an area fraction of a ferrite phase of 80% or more and 95% or less, an area fraction of pearlite of 5% or more and 20% or less, and an average ferrite grain size of 5 μm or more and 20 μm or less, in which in a ferrite grain size histogram, the average grain size of the largest 20% of ferrite grains in terms of grain size is 10 μm or more, and the pearlite has an average lamellar spacing of 200 nm or less, the area fraction, the average ferrite grain size, and the lamellar spacing being determined by microstructure observation.

公开(公告)号：US20210189518A1

公开(公告)日：2021-06-24

申请号：US16755313

申请日：2018-10-10

申请人： Outokumpu Oyj

发明人： Stefan LINDNER ,  Claire HEIDECKER

IPC分类号： C21D9/48 ,  C21D8/02

摘要： The invention relates to a method for partial hardening of a steel sheet by cold deformation, where the partial hardening of a steel is done by a cold deformation with a multi-step rolling and annealing process and in order to have a steel sheet with a homogeneous thickness steel sheet is used with at least two areas having different values in mechanical and/or physical properties in longitudinal direction of the material.

公开(公告)号：US11035022B2

公开(公告)日：2021-06-15

申请号：US17044106

申请日：2019-04-02

申请人： NIPPON STEEL CORPORATION

发明人： Masahiro Kubo ,  Yoshiaki Nakazawa

IPC分类号： C22C38/12 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/48 ,  B21D22/20 ,  C21D9/46 ,  B21B1/22 ,  C21D6/00 ,  C21D8/02 ,  C22C38/08 ,  C22C38/16 ,  C22C38/60

摘要： Provided are a metal sheet, a method of producing a metal sheet, a method of producing a molded product of a metal sheet, and a molded product of a metal sheet, in which occurrence of surface roughness is inhibited. Provided are a metal sheet satisfying conditions (a1), (b1) or (c1) at the surface and a method for producing the metal sheet. Also provided are a method for producing a molded product of a metal sheet using the metal sheet, and a molded product of the metal sheet. (a1) The area fraction of crystal grains having a crystal orientation divergent by 20° or more from a (111) plane and by 20° or more from a (001) plane is from 0.25 to 0.35, and the average crystal grain size is less than 16 μm. (b1) The area fraction of crystal grains having a crystal orientation divergent by 20° or more from a (111) plane and by 20° or more from a (001) plane is from 0.15 to 0.30, and the average crystal grain size is 16 μm or more. (c1) The area fraction of crystal grains with a Taylor Factor value from 3.0 to 3.4, when assuming plane strain tensile deformation in the transverse direction, is from 0.18 to 0.40.

公开(公告)号：US20210087648A1

公开(公告)日：2021-03-25

申请号：US16630022

申请日：2018-07-10

申请人： HILLE & MÜLLER GMBH

发明人： Ernst Wilhelm VOM BEY ,  Marcel ONINK ,  Ken-Dominic FLECHTNER ,  Maurice Jean, Robert JANSEN

IPC分类号： C21D9/48 ,  C21D8/04 ,  B32B15/01 ,  H01M50/128 ,  H01M50/164 ,  H01M50/526

摘要： Method of producing a low interfacial contact resistance material for use in batteries or connectors and a low interfacial contact resistance material for use in batteries or connectors produced thereby.