Invention Grant
- Patent Title: Ferritic stainless steel sheet superior in shapeability and method of production of the same
- Patent Title (中): 铁素体不锈钢板的成型性优良,生产方法相同
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Application No.: US12229825Application Date: 2008-08-26
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Publication No.: US08048239B2Publication Date: 2011-11-01
- Inventor: Junichi Hamada , Naoto Ono , Yoshiharu Inoue , Ken Kimura
- Applicant: Junichi Hamada , Naoto Ono , Yoshiharu Inoue , Ken Kimura
- 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: Kenyon & Kenyon, LLP
- Priority: JP2004-113478 20040407
- Main IPC: C21D8/02
- IPC: C21D8/02 ; C22C38/22 ; C22C38/26

Abstract:
The present invention provides a ferritic stainless steel sheet superior in shapeability containing, by wt %, C: 0.001 to 0.010%, Si: 0.01 to 1.0%, Mn: 0.01 to 1.0%, P: 0.01 to 0.04%, Cr: 10 to 20%, N: 0.001 to 0.020%, Nb: 0.3 to 1.0%, and Mo: 0.5 to 2.0%, wherein the total precipitates are, by wt %, 0.05 to 0.60%. A method of production of a ferritic stainless steel sheet superior in shapeability comprising producing a cold rolling material in the production process so that the Nb-based precipitates become, by vol %, 0.15% to 0.6% and have a diameter of 0.1 μm to 1 μm and/or so that the recrystallized grain size becomes 1 μm to 40 μm and the recrystallization rate becomes 10 to 90%, then cold rolling and annealing it at 1010 to 1080° C.
Public/Granted literature
- US20090000703A1 Ferritic stainless steel sheet superior in shapeability and method of production of the same Public/Granted day:2009-01-01
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