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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 9694561 B1

PDFFull Text
Date of Patent:
Jul. 04, 2017

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;

Masafumi Azuma, Tokyo, JP;

Takuya Kuwayama, Tokyo, JP;

Shigeru Yonemura, Tokyo, JP;

Inventors:

Hiroyuki Kawata, Tokyo, JP;

Naoki Maruyama, Tokyo, JP;

Akinobu Murasato, Tokyo, JP;

Akinobu Minami, Tokyo, JP;

Masafumi Azuma, Tokyo, JP;

Takuya Kuwayama, Tokyo, JP;

Shigeru Yonemura, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jonathan Johnson

Assistant Examiner:

Nicholas Wang

Int. Cl.
CPC ...
B32B 15/01 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01); C25D 5/36 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C21D 1/19 (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 38/34 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01);
U.S. Cl.
CPC ...
B32B 15/013 (2013.01); C21D 1/19 (2013.01); C21D 8/0205 (2013.01); C21D 8/0247 (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 38/34 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); C23C 2/02 (2013.01); C23C 2/06 (2013.01); C23C 2/28 (2013.01); C25D 5/36 (2013.01); C21D 2211/002 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); Y10T 428/12799 (2015.01);
Abstract

High strength steel sheet which secures tensile maximum strength 900 MPa or more high strength while having excellent shapeability, which high strength steel sheet which is excellent in shapeability characterized by having a predetermined composition of ingredients, by the steel sheet structure including a ferrite phase and martensite phase, by the ratio of Cu particles incoherent with the bcc iron being 15% or more with respect to the Cu particles as a whole, by a density of Cu particles in the ferrite phase being 1.0×10/mor more, and by an average particle size of Cu particles in the ferrite phase being 2.0 nm or more.

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