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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 11732341 B1

PDFFull Text
Date of Patent:
Aug. 22, 2023

Filed:

Oct. 19, 2016

Metal coated steel sheet, manufacturing method of hot-dip galvanized steel sheet, and manufacturing method of alloyed galvannealed steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Jun Haga, Tokyo, JP;

Kohichi Sano, Tokyo, JP;

Koutarou Hayashi, Tokyo, JP;

Kunio Hayashi, Tokyo, JP;

Masaharu Kameda, Tokyo, JP;

Akihiro Uenishi, Tokyo, JP;

Hiroyuki Kawata, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C23C 2/28 (2006.01); C22C 38/22 (2006.01); C22C 38/16 (2006.01); C22C 38/14 (2006.01); C22C 38/08 (2006.01); C22C 38/06 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); B32B 15/01 (2006.01); C23C 2/02 (2006.01); C23C 2/40 (2006.01); C21D 9/46 (2006.01); C21D 6/00 (2006.01); C22C 38/38 (2006.01); C21D 1/25 (2006.01); C22C 38/58 (2006.01); C21D 8/04 (2006.01); C23C 2/06 (2006.01); C21D 9/48 (2006.01);
U.S. Cl.
CPC ...
C23C 2/28 (2013.01); B32B 15/01 (2013.01); C21D 1/25 (2013.01); C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0442 (2013.01); C21D 8/0473 (2013.01); C21D 9/46 (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 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/22 (2013.01); C22C 38/38 (2013.01); C22C 38/58 (2013.01); C23C 2/02 (2013.01); C23C 2/06 (2013.01); C23C 2/40 (2013.01); C21D 2211/001 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

In a metal coated steel sheet, a chemical composition contains, in mass %, at least C: 0.03% to 0.70%, Si: 0.25% to 2.50%, Mn: 1.00% to 5.00%, P: 0.100% or less, S: 0.010% or less, sol. Al: 0.001% to 2.500, N: 0.020% or less, and a balance composed of iron and impurities, a metal structure contains greater than 5.0 vol % of retained austenite and greater than 5.0 vol % of tempered martensite, and satisfies a C content in the retained austenite being 0.85 mass % or more.

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