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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 10113223 B1

PDFFull Text
Date of Patent:
Oct. 30, 2018

Filed:

Nov. 05, 2015

Hot-dip galvanized steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Hiroyuki Kawata, Kisarazu, JP;

Takeshi Yasui, Cikarang, ID;

Kohei Ueda, Chiba, JP;

Naoki Maruyama, Kimitsu, JP;

Yuji Yamaguchi, Kimitsu, JP;

Satoshi Uchida, Kisarazu, JP;

Ryosuke Komami, Kimitsu, JP;

Hayato Arai, Nuevo Leon, MX;

Toyomitsu Nakamura, Kisarazu, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
C23C 2/40 (2006.01); C21D 9/46 (2006.01); C21D 6/00 (2006.01); C22C 38/04 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/02 (2006.01); B32B 15/00 (2006.01); C23C 2/34 (2006.01); C23C 2/04 (2006.01); C23C 28/02 (2006.01); C23C 28/00 (2006.01); C23C 2/06 (2006.01); C23C 2/02 (2006.01); B32B 15/18 (2006.01); B32B 15/04 (2006.01); C23C 30/00 (2006.01); B32B 15/01 (2006.01);
U.S. Cl.
CPC ...
C23C 2/40 (2013.01); B32B 15/00 (2013.01); B32B 15/01 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C23C 2/02 (2013.01); C23C 2/04 (2013.01); C23C 2/06 (2013.01); C23C 2/34 (2013.01); C23C 28/02 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/30 (2013.01); C23C 28/34 (2013.01); C23C 28/345 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); Y10T 428/1266 (2015.01); Y10T 428/12611 (2015.01); Y10T 428/12618 (2015.01); Y10T 428/12667 (2015.01); Y10T 428/12799 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/263 (2015.01); Y10T 428/264 (2015.01); Y10T 428/265 (2015.01); Y10T 428/27 (2015.01);
Abstract

A hot-dip galvanized steel sheet having a base steel sheet and a hot-dip galvanized layer, a ferrite phase is, by volume fraction, 50% or less in a range of ⅛ thickness to ⅜ thickness centered at a position of ¼ thickness from the surface of the base steel sheet, a hard structure is 50% or more, wherein the hot-dip galvanized steel sheet has the hot-dip galvanized layer in which Fe is 5.0% or less and Al is 1.0% or less, and columnar grains formed of a ζ phase is 20% or more in an entire interface between the plated layer and the base steel sheet. On the surface of the base steel sheet, a volume fraction of a residual austenite is 3% or less.

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