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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 9708697 B1

PDFFull Text
Expired
Date of Patent:
Jul. 18, 2017

Filed:

May. 29, 2013

High strength cold-rolled steel sheet and manufacturing method therefor

Applicant:

Kobe Steel, Ltd., Kobe-shi, JP;

Inventors:

Tomokazu Masuda, Kobe, JP;

Katsura Kajihara, Kobe, JP;

Toshio Murakami, Kobe, JP;

Masaaki Miura, Kakogawa, JP;

Muneaki Ikeda, Kakogawa, JP;

Assignee:

Kobe Steel, Ltd., Kobe-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/34 (2006.01); C22C 38/38 (2006.01); C22C 38/18 (2006.01); C22C 38/40 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C21D 1/18 (2006.01); C21D 1/25 (2006.01);
U.S. Cl.
CPC ...
C22C 38/38 (2013.01); C21D 1/18 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C21D 8/1272 (2013.01); C21D 9/46 (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 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); C21D 1/25 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

In a steel sheet having a specific chemical composition and having a microstructure including ferrite that is a soft first phase by 20-50% in terms of the area ratio, the remainder being tempered martensite and/or tempered bainite that is a hard second phase, the microstructure of steel of a surface layer section of the steel sheet from the surface to the depth of 100 μm and a center section of t/4-3t/4 (t is the sheet thickness) is controlled.

Find Patent Forward Citations

Masuda, Tomokazu. (2017). High strength cold-rolled steel sheet and manufacturing method therefor (U.S. Patent No. 9708697). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9708697

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

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