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公开(公告)号：EP4140613A1
公开(公告)日：2023-03-01
申请号：EP21792241.8
申请日：2021-04-20
发明人： FUJITA, Soshi , SUZUKI, Yuki , FUDA, Masahiro , IRIKAWA, Hideaki , KUBO, Masahiro , NOMURA, Naruhiko
IPC分类号： B21D22/20 , C21D1/18 , C21D9/00 , C22C21/02 , C22C38/00 , C22C38/60 , C23C2/12 , C23C2/28 , C23C26/00 , C23C28/00
摘要： This manufacturing method of a hot press-formed article includes a heating step of heating an Al-plated steel sheet and a forming step of obtaining a hot press-formed article using a die after the heating step, the Al-plated steel sheet has a base steel sheet, an Al plating layer, and a coating layer, the coating layer is a metal layer containing at least one metal of Mg, Ca, V, Ti, and Zn, a metal oxide layer containing an oxide of one or more of Mg, Ca, V, Ti, and Zn, or a mixed layer including the metal layer and the metal oxide layer, the die has a hard layer on a surface, HV Die that is a surface hardness of the die at a position of the hard layer is HV1500 or more and HV3800 or less, and a temperature Tm of the Al-plated steel sheet at a start of forming and an average movement velocity V of the die in the forming step satisfy 800 - (HV Die /40) ≤ Tm ≤ 850 - (V/4) - (HV Die /100).
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公开(公告)号：EP3272438B1
公开(公告)日：2020-07-22
申请号：EP16783251.8
申请日：2016-04-21
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3.发明公开
公开(公告)号：EP3778060A1
公开(公告)日：2021-02-17
申请号：EP19785517.4
申请日：2019-04-09
摘要： A method of producing a hot press-formed product includes subjecting an Al-plated steel sheet 10 having a zinc compound layer or a metallic zinc layer, as an outermost layer, provided on an A1 plating layer to hot press forming using a die 11. The die 11 includes a hard layer 11C having a skewness (Rsk), as measured in a direction from the outside of a die hole toward the inside of the die hole 11D, of 1.3 or less and a hardness Hv_Die of HV 2,000 or more, over the entirety of a region of a steel sheet contact surface 11A that is adjacent to a die shoulder portion 11B. The steel sheet contact surface 11A is a surface located outside of the die hole 11D and configured to contact the Al-plated steel sheet 10 that is to be subjected to the hot press forming.
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4.发明公开
公开(公告)号：EP3677701A1
公开(公告)日：2020-07-08
申请号：EP18863218.6
申请日：2018-09-28
发明人： KUBO, Masahiro , NAKAZAWA, Yoshiaki , SUZUKI, Toshiya , NOMURA, Naruhiko , FUJITA, Soshi , IRIKAWA, Hideaki , FUDA, Masahiro
摘要： Provided is a coated steel sheet including a steel sheet, a first aluminum coating layer provided on a first surface of the steel sheet, a zinc compound layer or a metallic zinc layer provided on a surface of the first aluminum coating layer, and a second aluminum coating layer provided on a second surface of the steel sheet, as an outermost surface of the steel sheet. Further provided are a coated steel sheet coil using this coated steel sheet, and a method of producing a hot-press formed article, as well as an automobile part using a press formed article produced by the method of producing a hot-press formed article.
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公开(公告)号：EP3604085A1
公开(公告)日：2020-02-05
申请号：EP18770303.8
申请日：2018-03-20
摘要： A hat member 1 includes a top-plate portion 13, first ridges 113, and two side walls 11. The two side walls have a middle hardness Dc of 300 HV or higher. Each of the two side walls 11 includes a softened portion L and a strength-transition portion T adjacent to the softened portion L. The softened portion L has a hardness Dn lower than the middle hardness Dc by at least 8 % (Dc-Dn≥0.08Dc). The strength-transition portion T extends 0.5 mm or longer from the softened portion L toward the first end of the side wall. The strength-transition portion T has a hardness Dt that transitionally changes within the range of 8 % to 1 % lower than the middle hardness Dc (0.92Dc≤Dt≤0.99Dc). The hat member 1 further includes two second ridges 114 and two flanges 14.
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公开(公告)号：EP3275566B1
公开(公告)日：2019-08-21
申请号：EP16783249.2
申请日：2016-04-21
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公开(公告)号：EP3564409A1
公开(公告)日：2019-11-06
申请号：EP17886827.9
申请日：2017-12-21
发明人： KUBO, Masahiro , NAKAZAWA, Yoshiaki , SUZUKI, Toshiya , NOMURA, Narihiko , FUJITA, Soshi , IRIKAWA, Hideaki
IPC分类号： C23C28/00 , B21D22/20 , B21D22/26 , C21D1/18 , C21D9/00 , C22C21/02 , C22C38/00 , C22C38/14 , C23C2/12
摘要： Provided are a plated steel sheet for hot stamping including: a plated steel sheet body including a steel sheet and an aluminum plating layer provided on one side or both sides of the steel sheet; and a zinc-based metal soap film provided on a surface of the plated steel sheet body on a side of the aluminum plating layer and having an adhesion amount of from 7.1 to 19.8 g/m 2 based on a Zn amount (when, in the plated steel sheet body, a zinc oxide film is on the surface of an aluminum plating layer, the total adhesion amount of the zinc oxide film and the zinc-based metal soap film is from 7.1 to 19.8 g/m 2 based on a Zn amount.), and a method of manufacturing such a sheet. Also provided are a method of manufacturing a hot-stamped component using the plated steel sheet for hot stamping, and a method of manufacturing a vehicle using a stamped component manufactured by a method of manufacturing a hot-stamped component.
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公开(公告)号：EP4397423A1
公开(公告)日：2024-07-10
申请号：EP22864535.4
申请日：2022-08-30
发明人： KUBO, Masahiro
摘要： A method for producing a structural member (10) includes a preparation step of preparing a starting material (M), and a shaping step of shaping the starting material (M) into the structural member (10) by using a die (20). The structural member (10) includes a member body (11), a first flange (12), and a second flange (13). The die (20) includes an upper die (23), a first lower die (21) for shaping the member body (11) and the first flange (12), and a second lower die (22) for shaping the second flange (13). The shaping step includes a first step that does not sandwich the starting material (M) between the upper die (23) and the second lower die (22), while sandwiching the starting material (M) between the upper die (23) and the first lower die (21), and a second step of shaping the second flange (13) by sandwiching the starting material (M) between the upper die (23) and the second lower die (22) after the first step.
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9.发明公开
公开(公告)号：EP4186611A1
公开(公告)日：2023-05-31
申请号：EP22215560.8
申请日：2019-04-09
IPC分类号： B21D22/02 , B21D53/88 , B32B15/01 , C21D1/25 , C21D1/613 , C21D1/673 , C21D1/74 , C21D1/76 , C21D8/04 , C21D8/00 , C23C2/12 , C23C2/26 , C23C2/28 , C23C28/02 , C23C28/04 , C23C8/02 , C23C8/10
摘要： The present invention relates to a press-formed product, comprising: a steel base material having a hardness Hv_Parts of HV 400 or more; an Al plating layer provided on the steel base material; and a zinc oxide layer, as an outermost surface layer, provided on the Al plating layer; wherein the press-formed product comprises: a top wall portion; a vertical wall portion connected to the top wall portion via a first ridge portion; and a flange portion connected to the vertical wall portion via a second ridge portion; wherein a position in the second ridge portion at which a curvature radius is smallest has a curvature radius [R min ] of from 3 mm to less than 10 mm, wherein, when transverse cross-sections of the press-formed product are observed to define a transverse cross-section in which the curvature radius of the second ridge portion is smallest, a difference [SaA1 - SaA2] between a smoothness [SaA1] at a central portion PA1 min in a cross-sectional width direction of the top wall portion, and a smoothness [SaA2] at a central portion PA2 min in a cross-sectional height direction of the vertical wall portion, is 0.20 µm or more in the transverse cross-section, and wherein a difference [StrA1 - StrA2] between a surface texture aspect ratio [StrA1] at the portion PA1 min in the top wall portion, and a surface texture aspect ratio [StrA2] at the portion PA2 min in the vertical wall portion, is 0.50 or less.
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10.发明公开
公开(公告)号：EP3778968A1
公开(公告)日：2021-02-17
申请号：EP19781740.6
申请日：2019-04-02
发明人： KUBO, Masahiro , NAKAZAWA, Yoshiaki
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.
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