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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 9464337 B1

PDFFull Text
Date of Patent:
Oct. 11, 2016

Filed:

May. 28, 2010

High strength steel sheet having excellent hydrogen embrittlement resistance

Applicants:

Yoichi Mukai, Shinagawa-ku, JP;

Kouji Kasuya, Kakogawa, JP;

Michiharu Nakaya, Kakogawa, JP;

Michitaka Tsunezawa, Kakogawa, JP;

Fumio Yuse, Kobe, JP;

Junichiro Kinugasa, Kobe, JP;

Sandra Traint, Linz, AT;

Andreas Pichler, Voecklabruck, AT;

Inventors:

Yoichi Mukai, Shinagawa-ku, JP;

Kouji Kasuya, Kakogawa, JP;

Michiharu Nakaya, Kakogawa, JP;

Michitaka Tsunezawa, Kakogawa, JP;

Fumio Yuse, Kobe, JP;

Junichiro Kinugasa, Kobe, JP;

Sandra Traint, Linz, AT;

Andreas Pichler, Voecklabruck, AT;

Assignees:

KABUSHIKI KAISHA KOBE SEIKO SHO, Kobe-shi, JP;

VOESTALPINE STAHL GMBH, Linz, AT;

Attorney:

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

Primary Examiner:

Roy King

Assistant Examiner:

Xiaowei Su

Int. Cl.
CPC ...
C21D 6/00 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C22C 38/00 (2006.01); C22C 38/38 (2006.01); C21D 9/46 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0252 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/38 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01);
Abstract

Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).

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