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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 9896751 B1

PDFFull Text
Date of Patent:
Feb. 20, 2018

Filed:

Jul. 27, 2012

High strength steel sheet and high strength galvanized steel sheet excellent in shapeability and methods of production of same

Applicants:

Hiroyuki Kawata, Tokyo, JP;

Naoki Maruyama, Tokyo, JP;

Akinobu Murasato, Tokyo, JP;

Akinobu Minami, Tokyo, JP;

Takeshi Yasui, Tokyo, JP;

Yuji Yamaguchi, Tokyo, JP;

Natsuko Sugiura, Tokyo, JP;

Inventors:

Hiroyuki Kawata, Tokyo, JP;

Naoki Maruyama, Tokyo, JP;

Akinobu Murasato, Tokyo, JP;

Akinobu Minami, Tokyo, JP;

Takeshi Yasui, Tokyo, JP;

Yuji Yamaguchi, Tokyo, JP;

Natsuko Sugiura, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Weiping Zhu

Int. Cl.
CPC ...
C22C 38/38 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01); B32B 15/01 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/34 (2006.01); C23C 2/02 (2006.01);
U.S. Cl.
CPC ...
C22C 38/38 (2013.01); B32B 15/013 (2013.01); C21D 8/0205 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (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 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/22 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/34 (2013.01); C23C 2/02 (2013.01); C23C 2/06 (2013.01); C23C 2/28 (2013.01); C21D 2211/001 (2013.01); C21D 2211/002 (2013.01); C21D 2211/008 (2013.01); Y10T 428/12799 (2015.01);
Abstract

High strength steel sheet and high strength galvanized steel sheet which are excellent in shapeability which secure a tensile maximum strength 900 MPa or more high strength while obtaining excellent ductility and stretch flangeability, which sheets have predetermined compositions of ingredients, have steel sheet structures which contain volume fraction 1 to 20% of residual austenite phases, and which have martensite transformation points of the residual austenite phases of −60° C. or less.

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