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 10344361 B1

Date of Patent:

Jul. 09, 2019

Filed:

Dec. 08, 2015

Ultra-high strength, hot-dip galvanized steel sheet having excellent surface quality and coating adhesion

Applicant:

Posco, Pohang-si, Gyeongsangbuk-do, KR;

Inventors:

Myung-Soo Kim, Gwangyang-si, KR;

Ki-Cheol Kang, Gwangyang-si, KR;

Assignee:

POSCO, Pohang-si, Gyeongsangbuk-do, KR;

Attorney:

Morgan Lewis & Bockius LLP

Primary Examiner:

Michael E La Villa

Int. Cl.

CPC ...

C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/04 (2006.01); C22C 38/60 (2006.01); C21D 8/02 (2006.01); C23C 2/06 (2006.01); B32B 15/00 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); C23C 28/02 (2006.01); C23C 30/00 (2006.01); C23C 2/12 (2006.01); C23C 28/00 (2006.01); C21D 6/00 (2006.01); C23C 2/02 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01); C22C 38/00 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/34 (2006.01); C22C 38/38 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C21D 9/56 (2006.01);

U.S. Cl.

CPC ...

C22C 38/02 (2013.01); B32B 15/012 (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 8/02 (2013.01); C21D 8/0226 (2013.01); C21D 8/0247 (2013.01); C21D 8/0257 (2013.01); C21D 8/0273 (2013.01); C21D 8/0436 (2013.01); C21D 8/0468 (2013.01); C21D 8/0473 (2013.01); C21D 9/48 (2013.01); C21D 9/561 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/34 (2013.01); C22C 38/38 (2013.01); C22C 38/60 (2013.01); C23C 2/02 (2013.01); C23C 2/06 (2013.01); C23C 2/12 (2013.01); C23C 2/28 (2013.01); C23C 2/40 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/025 (2013.01); C23C 28/321 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); C21D 2211/001 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); Y10T 428/12757 (2015.01); Y10T 428/12799 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/26 (2015.01);

Abstract

The present invention relates to an ultra-high strength, hot-dip galvanized steel sheet having excellent surface quality and coating adherence and to a method for manufacturing thereof, the ultra-high strength, hot-dip galvanized steel sheet comprising: 0.1-0.3% by weight carbon (C); 0.1-2.0% by weight silicon (Si); 0.005-1.5% by weight aluminum (Al); 1.5-3.5% by weight manganese (Mn); 0.04% by weight or less phosphorus (P) (excluding 0% by weight); 0.015% by weight or less sulphur (S) (excluding 0% by weight); 0.02% by weight or less nitrogen (N) (excluding 0% by weight); the balance being Fe; and other inevitable impurities, and further comprising 0.01 wt.% to 0.07 wt.% of at least one kind of element selected from the group consisting of bismuth (Bi), tin (Sn) and antimony (Sb).

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