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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 12516394 B1

PDFFull Text
Date of Patent:
Jan. 06, 2026

Filed:

Dec. 19, 2019

Plated steel sheet for hot press forming having excellent impact properties after hot press forming, hot press formed member, and manufacturing methods thereof

Applicant:

Posco, Pohang-si, KR;

Inventors:

Seong-Woo Kim, Gwangyang-si, KR;

Jin-Keun Oh, Gwangyang-si, KR;

Sang-Heon Kim, Gwangyang-si, KR;

Yeol-Rae Cho, Pohang-si, KR;

Assignee:

POSCO CO., LTD, Pohang-si, KR;

Attorney:

Morgan Lewis & Bockius LLP (WA)

Primary Examiner:

Kim S Horger

Int. Cl.
CPC ...
C21D 1/00 (2006.01); B21D 22/02 (2006.01); C21D 8/02 (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 38/28 (2006.01); C22C 38/32 (2006.01); C23C 2/02 (2006.01); C25D 3/22 (2006.01); C25D 3/44 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); B21D 22/022 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C21D 8/0273 (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 38/28 (2013.01); C22C 38/32 (2013.01); C23C 2/02 (2013.01); C23C 2/022 (2022.08); C23C 2/0224 (2022.08); C25D 3/22 (2013.01); C25D 3/44 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); C21D 2211/009 (2013.01);
Abstract

The present disclose relates to a plated steel sheet for hot press forming having excellent impact properties after hot press forming. The plated steel sheet includes: a base steel sheet containing, by weight, 0.15-0.4% of C, 0.1-1% of Si, 0.6-8% of Mn, 0.001-0.05% of P, 0.0001-0.02% of S, 0.01-0.1% of Al, 0.001-0.02% of N, 0.01-0.5% of Cr, and impurities; and a plating layer formed on the surface of the base steel sheet and composed of zinc, aluminum, or an alloy containing zinc and aluminum. The ratio (CS/CB) of a C content (CS) in a surface layer to a C content (CB) in the base steel sheet is 0.6 or less. The ratio ((MnS+CrS)/(MnB+CrB)) of the total content (MnS+CrS) of Mn and Cr in the surface layer to the total content (MnB+CrB) of Mn and Cr in the base steel sheet is 0.8 or more.

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