Invention Grant
- Patent Title: Hot rolled ferritic stainless steel sheet for cold rolling raw material
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Application No.: US14969310Application Date: 2015-12-15
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Publication No.: US10260134B2Publication Date: 2019-04-16
- Inventor: Junichi Hamada , Yuji Koyama , Yoshiharu Inoue , Tadashi Komori , Fumio Fudanoki , Toshio Tanoue , Naoto Ono
- Applicant: Nippon Steel & Sumikin Stainless Steel Corporation
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
- Current Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-081998 20120330
- Main IPC: C22C38/54
- IPC: C22C38/54 ; C21D9/46 ; C22C38/32 ; C21D6/00 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/20 ; C22C38/22 ; C22C38/26 ; C22C38/28 ; C22C38/40 ; C22C38/44 ; C22C38/48 ; C22C38/50 ; C21D8/02 ; C22C38/42 ; C22C38/52 ; C21D7/02 ; C21D7/13

Abstract:
A heat-resistant cold rolled ferritic stainless steel sheet containing, in mass %, 0.02% or less of C, 0.1% to 1.0% of Si, greater than 0.6% to 1.5% of Mn, 0.01% to 0.05% of P, 0.0001% to 0.0100% of S, 13.0% to 20.0% of Cr, 0.1% to 3.0% of Mo, 0.005% to 0.20% of Ti, 0.3% to 1.0% of Nb, 0.0002% to 0.0050% of B, 0.005% to 0.50% of Al, 0.02% or less of N, with the balance being Fe and inevitable impurities, in which {111}-oriented grains are present at an area ratio of 20% or greater in a region from a surface layer to t/4 (t is a sheet thickness), {111}-oriented grains are present at an area ratio of 40% or greater in a region from t/4 to t/2, and {011}-oriented grains are present at an area ratio of 15% or less in the entire region in a thickness direction.
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