- 专利标题: Hot-pressed member, method for manufacturing the same, and method for manufacturing steel sheet for hot-pressed member
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申请号: US17432349申请日: 2019-11-21
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公开(公告)号: US11795520B2公开(公告)日: 2023-10-24
- 发明人: Shimpei Yoshioka , Yoshihiko Ono , Katsutoshi Takashima , Takayuki Futatsuka , Kentaro Sato
- 申请人: JFE STEEL CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: JFE STEEL CORPORATION
- 当前专利权人: JFE STEEL CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Oliff PLC
- 优先权: JP 19030344 2019.02.22
- 国际申请: PCT/JP2019/045678 2019.11.21
- 国际公布: WO2020/170530A 2020.08.27
- 进入国家日期: 2021-08-19
- 主分类号: C21D8/02
- IPC分类号: C21D8/02 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C23C2/06 ; C23C2/02 ; C21D9/48 ; B32B15/01 ; C21D6/00 ; C22C38/00 ; C22C38/08 ; C22C38/10 ; C22C38/12 ; C22C38/16 ; C22C38/26 ; C22C38/28 ; C22C38/38 ; C22C38/60 ; C23C2/40 ; C23C2/12
摘要:
A hot-pressed member having excellent bending collapsibility, a method for manufacturing the same, and a method for manufacturing a steel sheet for the hot-pressed member. The hot-pressed member includes a steel sheet as a base material, the steel sheet having a specified chemical composition. The hot-pressed member has a microstructure in which a martensite microstructure is present in a volume fraction of 70% or greater, and a number density of inclusions having a longest diameter of 25 μm or greater is 0.02/mm2 or less. The hot-pressed member has a tensile strength of 1.8 GPa or greater.
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