Invention Grant
- Patent Title: High-strength hot rolled steel sheet and method for manufacturing the same
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Application No.: US15484171Application Date: 2017-04-11
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Publication No.: US10533236B2Publication Date: 2020-01-14
- Inventor: Yoshimasa Funakawa , Tetsuo Yamamoto , Hiroshi Uchomae , Hiroshi Nakano , Taro Kizu
- Applicant: JFE Steel Corporation
- Applicant Address: JP Tokyo
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: DLA Piper LLP (US)
- Priority: JP2011-284685 20111227
- Main IPC: C21D9/46
- IPC: C21D9/46 ; C21D8/02 ; C21D8/04 ; C22C38/00 ; C22C38/14 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/60 ; C22C38/08 ; C22C38/10 ; C22C38/12 ; C22C38/16 ; C22C38/22 ; C22C38/28

Abstract:
A method of manufacturing a high-strength hot rolled steel sheet by hot rolling a steel having a chemical composition including, by mass %: C: more than 0.010% and not more than 0.06%, Si: not more than 0.3%, Mn: not more than 0.8%, P: not more than 0.03%, S: not more than 0.02%, Al: not more than 0.1%, N: not more than 0.01% and Ti: 0.05 to 0.10%, the balance including Fe and inevitable impurities, including: after the steel is heated to an austenite single phase region, the steel is finish rolled at a finishing delivery temperature of 860° C. to 1050° C., the steel sheet is cooled at an average cooling rate of not less than 30° C./s in a temperature range of from a temperature after the completion of the finish rolling to 750° C., and the steel sheet is coiled into a coil at a coiling temperature of 580° C. to 700° C.
Public/Granted literature
- US20170218474A1 HIGH-STRENGTH HOT ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME Public/Granted day:2017-08-03
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