Invention Grant
- Patent Title: Black ferrite-based stainless steel sheet
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Application No.: US16486956Application Date: 2018-01-26
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Publication No.: US11326236B2Publication Date: 2022-05-10
- Inventor: Yoshikazu Tai , Tomoaki Saida , Kazunari Imakawa , Satoshi Suzuki
- 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: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPJP2017-032727 20170223
- International Application: PCT/JP2018/002452 WO 20180126
- International Announcement: WO2018/155075 WO 20180830
- Main IPC: B32B15/04
- IPC: B32B15/04 ; C22C38/32 ; B23K9/00 ; C21D6/00 ; C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C23C8/14 ; B23K103/04

Abstract:
Provided is a black stainless steel sheet that has excellent weldability, that can ensure good toughness and corrosion resistance, and that can maintain the blackness of the surface thereof, even after being welded. This black ferrite-based stainless steel sheet having excellent weldability includes, as a base, a stainless steel containing, in mass %, 0.020% or less of C, 1.0% or less of Si, 0.35% or less of Mn, 0.04% or less of P, 0.005% or less of S, 11-25% of Cr, 1.0% or less of Mo, 0.020% or less of N, 0.4% or less of Al, 10(C+N) to 0.3% of Ti, 0.05% or less of Nb, and 0.01% or less of O, and has a surface in which an oxide coating is formed on the base, wherein the surface has a lightness index (L*) satisfying L*≤45, chromaticity indices (a*, b*) satisfying −5≤a*≤5 and −5≤b*≤5, and a blackness (E) satisfying E=(L*2+a*2+b*2)1/2≤45.
Public/Granted literature
- US20200232075A1 BLACK FERRITE-BASED STAINLESS STEEL SHEET Public/Granted day:2020-07-23
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