Invention Grant
- Patent Title: Method for manufacturing high strength hot rolled steel sheet
- Patent Title (中): 高强度热轧钢板的制造方法
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Application No.: US12674281Application Date: 2008-08-20
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Publication No.: US08646301B2Publication Date: 2014-02-11
- Inventor: Takeshi Yokota , Kazuhiro Seto , Satoshi Ueoka , Nobuo Nishiura , Yoichi Tominaga
- Applicant: Takeshi Yokota , Kazuhiro Seto , Satoshi Ueoka , Nobuo Nishiura , Yoichi Tominaga
- Applicant Address: JP
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP
- Agency: DLA Piper LLP (US)
- Priority: JP2007-218062 20070824
- International Application: PCT/JP2008/065220 WO 20080820
- International Announcement: WO2009/028515 WO 20090305
- Main IPC: B21B27/06
- IPC: B21B27/06 ; B21D31/00

Abstract:
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.
Public/Granted literature
- US20110271733A1 METHOD FOR MANUFACTURING HIGH STRENGTH HOT ROLLED STEEL SHEET Public/Granted day:2011-11-10
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