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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 12054829 B1

PDFFull Text
Date of Patent:
Aug. 06, 2024

Filed:

Sep. 24, 2020

Plated steel sheet having excellent corrosion resistance, galling resistance, workability and surface property

Applicants:

Posco, Pohang-si, KR;

Steel & Convergence Technology Research Association, Pohang-si, KR;

Posco Coated & Color Steel Co., Ltd., Pohang-si, KR;

Inventors:

Sung-Joo Kim, Gwangyang-si, KR;

Kyung-Kwan Park, Pohang-si, KR;

Moon-Hi Hong, Pohang-si, KR;

Heung-Yun Kim, Pohang-si, KR;

Tae-Yeul Park, Pohang-si, KR;

Myung-Soo Kim, Gwangyang-si, KR;

Il-Ryoung Sohn, Gwangyang-si, KR;

Tae-Chul Kim, Gwangyang-si, KR;

Dae-Young Kang, Gwangyang-si, KR;

Assignees:

POSCO, Pohang-si, KR;

STEEL & CONVERGENCE TECHNOLOGY RESEARCH ASSOCIATION, Pohang-si, KR;

POSCO COATED & COLOR STEEL CO., LTD., Pohang-si, KR;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
C23C 2/06 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); C21D 7/06 (2006.01); C22C 18/00 (2006.01); C22C 18/04 (2006.01); C23C 2/00 (2006.01); C23C 2/02 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01); C23C 28/00 (2006.01); C23C 28/02 (2006.01); C23C 30/00 (2006.01);
U.S. Cl.
CPC ...
C23C 2/06 (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 7/06 (2013.01); C22C 18/00 (2013.01); C22C 18/04 (2013.01); C23C 2/0035 (2022.08); C23C 2/02 (2013.01); C23C 2/285 (2013.01); C23C 2/29 (2022.08); C23C 2/40 (2013.01); C23C 28/02 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/025 (2013.01); C23C 28/322 (2013.01); C23C 28/3225 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); Y10T 428/12951 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/12993 (2015.01); Y10T 428/24942 (2015.01); Y10T 428/24983 (2015.01); Y10T 428/263 (2015.01); Y10T 428/265 (2015.01);
Abstract

Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al plating layer provided on at least one surface of the base steel sheet; and an Fe—Al inhibition layer provided between the base steel sheet and the Zn—Mg—Al plating layer. The plating layer comprises, by weight %, 4 to 10% of Mg and 5.1-25% of Al and the remainder being Zn and unavoidable impurities with respect to components not including iron (Fe) diffused from the base steel sheet. The plating layer comprises a 24-50% MgZnphase in phase fraction. In the MgZnphase, an Al single phase is present in the ratio of 1-30% relative to the cross-sectional area of the total MgZnphase.

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