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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 11530474 B1

PDFFull Text
Date of Patent:
Dec. 20, 2022

Filed:

Feb. 15, 2019

Fe—al-based plated hot-stamped member and manufacturing method of fe—al-based plated hot-stamped member

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Soshi Fujita, Tokyo, JP;

Yuki Suzuki, Tokyo, JP;

Masahiro Fuda, Tokyo, JP;

Jun Maki, Tokyo, JP;

Hideaki Irikawa, Tokyo, JP;

Tatsuya Kubota, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Mary I Omori

Int. Cl.
CPC ...
C23C 2/12 (2006.01); B32B 15/10 (2006.01); B21D 22/02 (2006.01); C21D 8/02 (2006.01); C22C 21/02 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01); C22C 38/32 (2006.01); C22C 38/42 (2006.01); C22C 38/60 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01); C23C 28/02 (2006.01);
U.S. Cl.
CPC ...
C23C 2/12 (2013.01); B21D 22/022 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0273 (2013.01); C22C 21/02 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/30 (2013.01); C22C 38/32 (2013.01); C22C 38/42 (2013.01); C22C 38/60 (2013.01); C23C 2/28 (2013.01); C23C 2/40 (2013.01); C23C 28/021 (2013.01);
Abstract

Fe-Al-based plated hot-stamped member exhibiting excellent formed part corrosion resistance and post-coating corrosion resistance and manufacturing method. The hot-stamping member includes Fe-Al-based plated layer on one or both surfaces of a base material, the base material has a predetermined steel component, Fe-Al-based plated layer has a thickness of 10 μm or more and 60 μm or less, formed by A, B, C and D layers sequentially from a surface toward the base material, and each of the four layers is a Fe-Al-based intermetallic compound containing Al, Fe, Si, Mn and Cr for predetermined contents with the balance made up of impurities, the D layer further contains Kirkendall voids each of which cross-sectional area is 3 μm-30 μmfor 10 pieces/6000 μmor more and 40 pieces/6000 μmor less.

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