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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 9631250 B1

PDFFull Text
Date of Patent:
Apr. 25, 2017

Filed:

Feb. 28, 2013

High-strength cold-rolled steel sheet and method for manufacturing the same

Applicant:

Jfe Steel Corporation, Chiyoda-ku, Tokyo, JP;

Inventors:

Hidetaka Kawabe, Tokyo, JP;

Takeshi Yokota, Tokyo, JP;

Reiko Sugihara, Tokyo, JP;

Shigeyuki Aizawa, Tokyo, JP;

Kazuki Nakazato, Tokyo, JP;

Assignee:

JFE Steel Corporation, Tokyo, JP;

Attorney:

RatnerPrestia

Primary Examiner:

Roy King

Assistant Examiner:

Caitlin Kiechle

Int. Cl.
CPC ...
C21D 8/02 (2006.01); C22C 38/14 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C21D 1/25 (2006.01); C21D 1/26 (2006.01);
U.S. Cl.
CPC ...
C21D 8/0263 (2013.01); C21D 1/25 (2013.01); C21D 1/26 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0278 (2013.01); C21D 8/0473 (2013.01); C21D 9/48 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01); C21D 8/0436 (2013.01); C21D 2211/001 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

A steel sheet has a microstructure including ferrite phase: 40% to 60%, bainite phase: 10% to 30%, tempered martensite phase: 20% to 40%, and retained austenite phase: 5% to 20% by volume fraction, and satisfying a condition that a ratio of tempered martensite phase having major axis length ≦5 μm to a total volume fraction of the tempered martensite phase is 80% to 100%.

Find Patent Forward Citations

Kawabe, Hidetaka. (2017). High-strength cold-rolled steel sheet and method for manufacturing the same (U.S. Patent No. 9631250). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9631250

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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