Invention Grant
- Patent Title: Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing
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Application No.: US15104689Application Date: 2013-12-20
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Publication No.: US10344351B2Publication Date: 2019-07-09
- Inventor: Koutarou Hayashi , Toshinobu Nishibata
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- International Application: PCT/JP2013/084333 WO 20131220
- International Announcement: WO2015/092929 WO 20150625
- Main IPC: C22C38/02
- IPC: C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/14 ; C21D6/02 ; C21D8/02 ; C21D8/04 ; C21D9/46 ; C21D9/48 ; C21D1/18 ; C22C38/58 ; C22C38/00 ; C22C38/12 ; C21D7/13 ; C22C38/08 ; C22C38/16 ; C22C38/28 ; B21D22/02

Abstract:
A hot-pressed steel sheet member includes: a specific chemical composition; and a steel microstructure represented by, in area %, ferrite: 10% to 70%, martensite: 30% to 90%, and a total area ratio of ferrite and martensite: 90% to 100%. 90% or more of all Ti in steel precipitates, and a tensile strength of the hot-pressed steel sheet member is 980 MPa or more.
Public/Granted literature
- US20160312330A1 HOT-PRESSED STEEL SHEET MEMBER, METHOD OF MANUFACTURING THE SAME, AND STEEL SHEET FOR HOT PRESSING Public/Granted day:2016-10-27
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