发明申请
- 专利标题: METHOD FOR PRODUCING COLD-ROLLED STEEL SHEET
- 专利标题(中): 生产冷轧钢板的方法
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申请号: US14130568申请日: 2012-07-02
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公开(公告)号: US20140238557A1公开(公告)日: 2014-08-28
- 发明人: Jun Haga , Takuya Nishio , Masayuki Wakita , Yasuaki Tanaka , Norio Imai , Toshiro Tomida , Mitsuru Yoshida , Kengo Hata
- 申请人: Jun Haga , Takuya Nishio , Masayuki Wakita , Yasuaki Tanaka , Norio Imai , Toshiro Tomida , Mitsuru Yoshida , Kengo Hata
- 申请人地址: JP Tokyo
- 专利权人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人地址: JP Tokyo
- 优先权: JP2011-150241 20110706; JP2011-150242 20110706; JP2011-150243 20110706; JP2011-150244 20110706; JP2011-150247 20110706; JP2011-150248 20110706
- 国际申请: PCT/JP2012/066878 WO 20120702
- 主分类号: C21D8/02
- IPC分类号: C21D8/02
摘要:
A method for producing a high-tensile cold-rolled steel sheet includes subjecting a slab having a composition containing C: more than 0.020% and less than 0.30%, Si: more than 0.10% and 3.00% or less, and Mn: more than 1.00% and 3.50% or less to hot rolling wherein the roll draft of the final one pass is higher than 15%, and rolling is finished in the temperature region of Ar3 point or higher, optionally annealing wherein the hot-rolled steel sheet is heated to 300° C. or higher after being cooled to 780° C. or lower, coiling higher than 400° C. or lower than 400° C., cold rolling the hot-rolled steel sheet or the annealed steel sheet, and annealing wherein the cold-rolled steel sheet is soaked in the temperature region of (Ac3 point−40° C.) or higher, cooling to 500° C. or lower and 300° C. or higher, and holding in that temperature region for 30 seconds or longer.
公开/授权文献
- US10174392B2 Method for producing cold-rolled steel sheet 公开/授权日:2019-01-08