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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 12742234 B1

PDFFull Text
Date of Patent:
Sep. 22, 2026

Filed:

Jan. 28, 2022

Alloyed hot-dip galvanized steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Katsuya Nakano, Tokyo, JP;

Shuntaro Matsuyama, Tokyo, JP;

Taihei Kaneto, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Katherine A Christy

Int. Cl.
CPC ...
C23C 2/06 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C23C 2/40 (2006.01);
U.S. Cl.
CPC ...
C23C 2/06 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/14 (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

An alloyed hot-dip galvanized steel sheet excellent in appearance and press-formability, comprising a base steel sheet having a predetermined chemical composition. If the base steel sheet has a chemical composition containing, by mass %, Mn: 0.01 to 1.30%, the predetermined relationships of formulas (1) and (3) are satisfied and if the base steel sheet has a chemical composition containing, by mass %, Mn: 1.70 to 2.00%, the predetermined relationships of formulas (2) and (3) are satisfied. The amounts of Mn, P, S, Ti, and Nb detected in the extraction residue of the base steel sheet satisfy the predetermined relationship of formula (4). The average grain diameter of the base steel sheet is 7.5 μm or less.

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