The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2014
Filed:
Aug. 20, 2008
Takeshi Yokota, Tokyo, JP;
Kazuhiro Seto, Tokyo, JP;
Satoshi Ueoka, Tokyo, JP;
Nobuo Nishiura, Tokyo, JP;
Yoichi Tominaga, Tokyo, JP;
Takeshi Yokota, Tokyo, JP;
Kazuhiro Seto, Tokyo, JP;
Satoshi Ueoka, Tokyo, JP;
Nobuo Nishiura, Tokyo, JP;
Yoichi Tominaga, Tokyo, JP;
JFE Steel Corporation, , JP;
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.