- 专利标题: Zinc-plated steel sheet and manufacturing method thereof
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申请号: US17047663申请日: 2019-04-26
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公开(公告)号: US11859259B2公开(公告)日: 2024-01-02
- 发明人: Takafumi Yokoyama , Kunio Hayashi , Masahiro Nakata , Yuji Yamaguchi , Satoshi Uchida
- 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: JP 18088418 2018.05.01
- 国际申请: PCT/JP2019/017949 2019.04.26
- 国际公布: WO2019/212045A 2019.11.07
- 进入国家日期: 2020-10-14
- 主分类号: C21D9/46
- IPC分类号: C21D9/46 ; B32B15/01 ; C21D1/26 ; C21D6/00 ; C22C3/00 ; C22C38/02 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/54 ; C22C38/58 ; C22C38/60 ; C23C2/02 ; C23C2/06 ; C23C2/40 ; C23C2/28 ; C22C38/00
摘要:
A zinc-plated steel sheet includes a steel sheet having a predetermined chemical composition and a zinc-plated layer. In the steel sheet, steel microstructures in a range of ⅛ thickness to ⅜ thickness, having the center at ¼ thickness from a steel sheet surface, include, by vol %, ferrite: 0% to 10%, bainite: 0% to 30%, tempered martensite: 50% or more, fresh martensite: 0% to 10%, retained austenite: more than 10% and 30% or less, and pearlite: 0% to 5%. In the zinc-plated steel sheet, the amount of hydrogen emitted when the steel sheet is heated to 200° C. from room temperature after removal of the zinc-plated layer is 0.40 ppm or less per mass of the steel sheet, the tensile strength is 1470 MPa or more, and no cracking occurs in a U-shape bending test where a stress equivalent to 1000 MPa is applied for 24 hours.
公开/授权文献
- US20210155999A1 ZINC-PLATED STEEL SHEET AND MANUFACTURING METHOD THEREOF 公开/授权日:2021-05-27
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