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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 10590504 B1

PDFFull Text
Date of Patent:
Mar. 17, 2020

Filed:

Oct. 27, 2015

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

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Katsutoshi Takashima, Chiba, JP;

Kohei Hasegawa, Tokyo, JP;

Yoshimasa Funakawa, Chiba, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Jenny R Wu

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C22C 38/14 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/58 (2006.01); C21D 8/04 (2006.01); C21D 1/28 (2006.01); C22C 38/18 (2006.01); C21D 9/48 (2006.01); C21D 6/00 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 1/28 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0247 (2013.01); C21D 8/0263 (2013.01); C21D 8/0273 (2013.01); C21D 8/0405 (2013.01); C21D 8/0426 (2013.01); C21D 8/0436 (2013.01); C21D 8/0447 (2013.01); C21D 8/0463 (2013.01); C21D 8/0473 (2013.01); C21D 9/48 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/38 (2013.01); C22C 38/58 (2013.01); C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 8/0278 (2013.01); C21D 8/0478 (2013.01); C21D 2211/002 (2013.01); C21D 2211/008 (2013.01);
Abstract

A high-strength cold-rolled steel sheet having a specified chemical composition and a microstructure including ferrite having an average crystal grain diameter of 2 μm or less in an amount of 10% to 25% in terms of volume fraction, retained austenite in an amount of 5% to 20% in terms of volume fraction, martensite having an average crystal grain diameter of 2 μm or less in an amount of 5% to 15% in terms of volume fraction, and the balance being a multi-phase structure including bainite and tempered martensite having an average crystal grain diameter of 5 μm or less, in which a relational expression, 0.35≤V2/V1≤0.75 (1), is satisfied, where V1 is a volume fraction of phases which are different from ferrite and V2 is a volume fraction of tempered martensite.

Find Patent Forward Citations

Takashima, Katsutoshi. (2020). High-strength cold-rolled steel sheet and method for manufacturing the same (U.S. Patent No. 10590504). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10590504

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

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