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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.:

US 8951367 B1

PDFFull Text
Date of Patent:
Feb. 10, 2015

Filed:

Feb. 16, 2011

Ultra high strength cold rolled steel sheet having excellent bendability

Applicants:

Kenji Kawamura, Chiba, JP;

Kazuhiro Seto, Chiba, JP;

Inventors:

Kenji Kawamura, Chiba, JP;

Kazuhiro Seto, Chiba, JP;

Assignee:

JFE Steel Corporation, , JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/38 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/00 (2006.01);
U.S. Cl.
CPC ...
C21D 8/0236 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C21D 8/0226 (2013.01); C21D 8/0257 (2013.01); C22C 38/001 (2013.01); C21D 2211/008 (2013.01);
Abstract

A cold rolled steel sheet with excellent bendability contains C at 0.15 to 0.30%, Si at 0.01 to 1.8%, Mn at 1.5 to 3.0%, P at not more than 0.05%, S at not more than 0.005%, Al at 0.005 to 0.05% and N at not more than 0.005%, the balance being Fe and inevitable impurities, and has a steel sheet superficial soft portion satisfying:()/()≦0.8  (1)wherein Hv(S) is hardness of the steel sheet superficial soft portion, and Hv(C) is hardness of a steel sheet core portion,0.10≦()/≦0.30  (2)wherein t(S) is thickness of the steel sheet superficial soft portion, and t is the sheet thickness.

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Quick Actions:

Kawamura, Kenji. (2015). Ultra high strength cold rolled steel sheet having excellent bendability (U.S. Patent No. 8951367). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8951367

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