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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 12123095 B1

PDFFull Text
Date of Patent:
Oct. 22, 2024

Filed:

Jul. 20, 2021

Hot-dip galvanized steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Shota Kikuchi, Tokyo, JP;

Masafumi Azuma, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Daniel J Schleis

Int. Cl.
CPC ...
C23C 2/40 (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 38/14 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01);
U.S. Cl.
CPC ...
C23C 2/40 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01); C23C 2/02 (2013.01); C23C 2/024 (2022.08); C23C 2/06 (2013.01); C21D 2211/005 (2013.01);
Abstract

This hot-dip galvanized steel sheet includes: a steel sheet; a boundary layer provided on the steel sheet; and a hot-dip galvanized layer provided on the boundary layer, in which the steel sheet has a predetermined chemical composition, in a region between a surface of the steel sheet and a depth of 25 μm from the surface of the steel sheet, an average grain size exceeds 4.0 μm, in a region between a position of 50 μm from the surface of the steel sheet and a position of 100 μm from the surface of the steel sheet, an area ratio of unrecrystallized ferrite is 50% or more, and in the hot-dip galvanized layer, a maximum value of a C concentration is 0.05 mass % or more.

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