Invention Grant
- Patent Title: Ferritic stainless steel sheet
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Application No.: US17770095Application Date: 2020-11-17
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Publication No.: US12060632B2Publication Date: 2024-08-13
- Inventor: Kou Nishimura , Yoshiharu Inoue
- Applicant: NIPPON STEEL STAINLESS STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL STAINLESS STEEL CORPORATION
- Current Assignee: NIPPON STEEL STAINLESS STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Clark & Brody LP
- Priority: JP 19208646 2019.11.19
- International Application: PCT/JP2020/042749 2020.11.17
- International Announcement: WO2021/100687A 2021.05.27
- Date entered country: 2022-04-19
- Main IPC: C22C38/60
- IPC: C22C38/60 ; C21D1/06 ; C21D6/00 ; C21D8/02 ; C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/52 ; C22C38/54 ; C23C8/26

Abstract:
A ferritic stainless steel sheet includes a base metal and a nitrided layer that is formed on a surface of the base metal, a chemical composition of the base metal contains, in mass %, C: 0.001 to 0.020%, Si: 0.01 to 1.50%, Mn: 0.01 to 1.50%, P: 0.010 to 0.050%, S: 0.0001 to 0.010%, Cr: 16.0 to 25.0%, N: 0.001 to 0.030%, Ti: 0.01 to 0.30%, and optional elements, with the balance: Fe and unavoidable impurities, a steel microstructure of the base metal includes, in volume ratio, 95% or more of a ferritic phase, the nitrided layer is a layer that is present in a region from a surface of a rolled surface to a 0.05 μm depth position in a sheet thickness direction, and an average nitrogen concentration in the nitrided layer is, in mass %, 0.80% or more.
Public/Granted literature
- US20220389555A1 FERRITIC STAINLESS STEEL SHEET Public/Granted day:2022-12-08
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