- 专利标题: Overlapped blank for hot stamping, method of manufacturing overlapped hot stamp molded body, and overlapped hot stamp molded body
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申请号: US16613981申请日: 2019-04-05
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公开(公告)号: US11364707B2公开(公告)日: 2022-06-21
- 发明人: Soshi Fujita , Yuki Suzuki , Masahiro Fuda , Jun Maki , Hideaki Irikawa , Masahiro Nakata
- 申请人: NIPPON STEEL CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: NIPPON STEEL CORPORATION
- 当前专利权人: NIPPON STEEL CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JPJP2018-074025 20180406
- 国际申请: PCT/JP2019/015180 WO 20190405
- 国际公布: WO2019/194308 WO 20191010
- 主分类号: B23K31/02
- IPC分类号: B23K31/02 ; B32B15/01 ; B21D22/02 ; C23C2/12
摘要:
To solve the problem about the difference in temperature increasing rate between an overlapped part and a one-sheet part so as to further improve the corrosion resistance of plating after hot stamping. An overlapped blank for hot stamping includes: a first steel sheet; and at least one second steel sheet connected to a surface of the first steel sheet via a welding point and smaller in area than the first steel sheet, wherein: the first steel sheet is a plated steel sheet having an aluminum-based plated layer on both faces of the first steel sheet, and the second steel sheet is a plated steel sheet having an aluminum-based plated layer on both faces of the second steel sheet; a coating weight of the aluminum-based plated layer on the first steel sheet is W1 (g/m2) in terms of an average coating weight on both the faces; a coating weight of the aluminum-based plated layer on a surface on a side not in contact with the first steel sheet in the second steel sheet is W2 (g/m2); and each of the W1 and the W2 is within a range of 20 g/m2 or more and 120 g/m2 or less, and satisfies relationships of Expression (1) and Expression (2).
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