发明授权
- 专利标题: Hot-stamped steel
-
申请号: US15129640申请日: 2015-03-31
-
公开(公告)号: US09932652B2公开(公告)日: 2018-04-03
- 发明人: Akihiro Sengoku , Hiroshi Takebayashi
- 申请人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2014-073814 20140331
- 国际申请: PCT/JP2015/060235 WO 20150331
- 国际公布: WO2015/152284 WO 20151008
- 主分类号: C22C38/50
- IPC分类号: C22C38/50 ; C22C38/32 ; C22C38/28 ; C22C38/26 ; C22C38/22 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; C22C38/54 ; C23C2/06 ; C23C2/40 ; B32B15/01 ; C21D9/46 ; C25D3/22 ; C25D5/36 ; C25D7/00 ; C21D1/18 ; C23C2/28 ; C23C28/02 ; C23C2/00 ; C23C30/00 ; B32B15/04 ; B32B15/18 ; C22C38/58 ; C25D5/50 ; C21D9/00 ; C21D1/673 ; C25D3/24
摘要:
Hot-stamped steel includes: a base metal that is steel including a tempered portion having hardness corresponding to 85% or less of the highest quenching hardness, the highest quenching hardness being defined as a Vickers hardness at a depth position spaced away from a surface by ¼ times a sheet thickness in a case of performing water quenching after heating at a temperature equal to or higher than an Ac3 point and retention for 30 minutes; and a Zn coating layer that is formed on the tempered portion of the base metal. The Zn coating layer includes a solid-solution layer including a solid-solution phase that contains Fe and Zn that is solid-soluted in Fe, and a lamella layer that includes the solid-solution phase and a capital gamma phase. An area ratio of the lamella layer in the Zn coating layer is 20% or less.
公开/授权文献
- US20170145532A1 HOT-STAMPED STEEL 公开/授权日:2017-05-25
信息查询