Invention Grant
- Patent Title: Hot-rolled steel sheet and production method thereof
- Patent Title (中): 热轧钢板及其制造方法
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Application No.: US14007583Application Date: 2012-03-28
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Publication No.: US09546413B2Publication Date: 2017-01-17
- Inventor: Takayuki Nozaki , Manabu Takahashi , Nobuhiro Fujita , Hiroshi Yoshida , Shinichiro Watanabe , Takeshi Yamamoto , Chisato Wakabayashi , Riki Okamoto , Kohichi Sano
- Applicant: Takayuki Nozaki , Manabu Takahashi , Nobuhiro Fujita , Hiroshi Yoshida , Shinichiro Watanabe , Takeshi Yamamoto , Chisato Wakabayashi , Riki Okamoto , Kohichi Sano
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2011-070725 20110328
- International Application: PCT/JP2012/058160 WO 20120328
- International Announcement: WO2012/133540 WO 20121004
- Main IPC: C22C38/26
- IPC: C22C38/26 ; C21D8/02 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/12 ; C22C38/14 ; C22C38/08 ; C22C38/10 ; C22C38/16 ; C22C38/28 ; C22C38/34 ; C22C38/38 ; C21D9/46 ; B32B15/01 ; C22C38/60 ; C23C2/02 ; C23C2/06 ; C23C2/28 ; C23C2/40 ; C21D8/04

Abstract:
Disclosed is a hot-rolled steel sheet including, by mass %, C:0.02% to 0.5% of C, and the sum of the content of Si and the content of Al is 1.0% to 4.0%. An average pole density of an orientation group from {100} to {223} is 1.0 to 6.5, and a pole density of a crystal orientation {332} is 1.0 to 5.0. A microstructure includes, by of an area ratio, 2% to 30% of retained austenite, 20% to 50% of ferrite, and 10% to 60% of bainite. rC that is a Lankford value in a direction orthogonal to a rolling direction is 0.70 to 1.10, and r30 that is a Lankford value in a direction forming an angle of 30° with the rolling direction is 0.70 to 1.10.
Public/Granted literature
- US20140014236A1 HOT-ROLLED STEEL SHEET AND PRODUCTION METHOD THEREOF Public/Granted day:2014-01-16
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