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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 10232426 B1

PDFFull Text
Date of Patent:
Mar. 19, 2019

Filed:

Dec. 17, 2014

Automobile part and method for manufacturing automobile part

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Jun Maki, Tokyo, JP;

Shintaro Yamanaka, Tokyo, JP;

Hideaki Irikawa, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Tahseen Khan

Int. Cl.
CPC ...
B21D 53/88 (2006.01); B21D 22/20 (2006.01); C25D 13/00 (2006.01); C25D 13/20 (2006.01); C22C 21/02 (2006.01); C22C 38/14 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C23C 2/06 (2006.01); C23C 2/40 (2006.01); C23C 28/00 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 21/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C23C 2/04 (2006.01); C23C 22/07 (2006.01);
U.S. Cl.
CPC ...
B21D 53/88 (2013.01); B21D 22/208 (2013.01); C21D 8/0278 (2013.01); C21D 8/0478 (2013.01); C21D 9/46 (2013.01); C21D 9/48 (2013.01); C22C 21/00 (2013.01); C22C 21/02 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01); C23C 2/04 (2013.01); C23C 2/06 (2013.01); C23C 2/405 (2013.01); C23C 22/07 (2013.01); C23C 28/32 (2013.01); C23C 28/345 (2013.01); C25D 13/00 (2013.01); C25D 13/20 (2013.01); C22C 38/00 (2013.01);
Abstract

[Object] There are provided automobile parts and a method for manufacturing the automobile parts. The automobile parts have an excellent corrosion resistance after coated with a electrodeposition paint with smaller thickness, improve formability and productivity in hot pressing, and also improve chemical conversion treatability after hot press-forming. [Solution] An automobile part according to the present invention includes: a formed steel sheet having an intermetallic compound layer formed on a surface of the steel sheet, the intermetallic compound layer being formed of Al—Fe intermetallic compound having a thickness of 10 μm or more and 50 μm or less, the intermetallic compound layer including a diffusion layer positioned in closest proximity to the steel sheet, the diffusion layer having a thickness of 10 μm or less; a surface coating layer provided on a surface of the intermetallic compound layer, the surface coating layer including a coating containing ZnO and a zinc phosphate coating and having a surface roughness of 3 μm or more and 20 μm or less as a maximum profile height Rt in accordance with JIS B0601 (2001); and an electrodeposition paint film provided on a surface of the surface coating layer and having a thickness of 6 μm or more and less than 15 μm.

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