Invention Grant
- Patent Title: Steel member, steel sheet, and methods for manufacturing same
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Application No.: US17292308Application Date: 2020-02-05
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Publication No.: US11352684B2Publication Date: 2022-06-07
- Inventor: Shinichiro Tabata , Kazuhisa Kusumi , Kazuo Hikida , Hideaki Irikawa
- Applicant: NIPPON STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL CORPORATION
- Current Assignee: NIPPON STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPJP2019-019077 20190205
- International Application: PCT/JP2020/004421 WO 20200205
- International Announcement: WO2020/162509 WO 20200813
- Main IPC: C22C38/58
- IPC: C22C38/58 ; C21D8/02 ; C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/54
Abstract:
The present invention has as its object the provision of a steel member and steel sheet having high tensile strength and toughness and excellent in hydrogen embrittlement resistance in a corrosive environment and methods for manufacturing the same. The steel member of the present invention has predetermined chemical constituents and has a maximum value of content of Cu in a range from the surface to a depth of 0 to 30 μm of 1.4 times the content of Cu at a depth of 200 μm.
Public/Granted literature
- US20210395870A1 STEEL MEMBER, STEEL SHEET, AND METHODS FOR MANUFACTURING SAME Public/Granted day:2021-12-23
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