发明申请
- 专利标题: METHOD FOR MANUFACTURING HIGH STRENGTH HOT ROLLED STEEL SHEET
- 专利标题(中): 制造高强度热轧钢板的方法
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申请号: US12674281申请日: 2008-08-20
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公开(公告)号: US20110271733A1公开(公告)日: 2011-11-10
- 发明人: Takeshi Yokota , Kazuhiro Seto , Satoshi Ueoka , Nobuo Nishiura , Yoichi Tominaga
- 申请人: Takeshi Yokota , Kazuhiro Seto , Satoshi Ueoka , Nobuo Nishiura , Yoichi Tominaga
- 申请人地址: JP Tokyo
- 专利权人: JFE STEEL CORPORATION
- 当前专利权人: JFE STEEL CORPORATION
- 当前专利权人地址: JP Tokyo
- 优先权: JP2007-218062 20070824
- 国际申请: PCT/JP2008/065220 WO 20080820
- 主分类号: B21D31/00
- IPC分类号: B21D31/00
摘要:
A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.
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