- 专利标题： Steel sheet and method for producing the same
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申请号： US17286148申请日： 2019-10-16
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公开(公告)号： US12123069B2公开(公告)日： 2024-10-22
- 发明人: Yoshihiko Ono , Junya Tobata , Hiroyuki Akimoto , Yoichiro Matsui , Shinjiro Kaneko
- 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 18196150 2018.10.17 JP 19165438 2019.09.11
- 国际申请： PCT/JP2019/040663 2019.10.16
- 国际公布： WO2020/080402A 2020.04.23
- 进入国家日期： 2021-04-16
- 主分类号： C21D9/46
- IPC分类号： C21D9/46 ; C21D1/20 ; C21D6/00 ; C21D8/02 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/12 ; C22C38/14 ; C22C38/42 ; C22C38/44 ; C22C38/50 ; C22C38/54 ; C22C38/58 ; C22C38/60
摘要：
A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure comprising ferrite: 5% or less, and at least one of upper bainite, fresh martensite, tempered martensite, lower bainite, and retained γ: 95% to 100% by area percentage, and retained γ: 4% to 15% by volume percentage. Retained γUB has a specified area percentage SγUB, retained γLB has a specified distribution number NγLB, and at least one of (i) fresh martensite has a specified equivalent circular grain diameter and aspect ratio and (ii) retained γ grains has a specified equivalent circular grain diameter and aspect ratio.
公开/授权文献
- US20210355559A1 STEEL SHEET AND METHOD FOR PRODUCING THE SAME 公开/授权日：2021-11-18
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