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.:
Date of Patent:
Jan. 06, 2009
Filed:
May. 19, 2004
Tetsu Iwase, Fujisawa, JP;
Seiji Sasabe, Fujisawa, JP;
Mitsuo Hino, Tokyo, JP;
Kensuke Tsubota, Tokyo, JP;
Fumihiro Sato, Moka, JP;
Shunichi Hashimoto, Kakogawa, JP;
Jun Katoh, Kobe, JP;
Hiroyuki Takeda, Kobe, JP;
Tetsu Iwase, Fujisawa, JP;
Seiji Sasabe, Fujisawa, JP;
Mitsuo Hino, Tokyo, JP;
Kensuke Tsubota, Tokyo, JP;
Fumihiro Sato, Moka, JP;
Shunichi Hashimoto, Kakogawa, JP;
Jun Katoh, Kobe, JP;
Hiroyuki Takeda, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Nisshin Steel Co., Ltd., Tokyo, JP;
Abstract
A joined part of an aluminum-coated steel sheet and an aluminum sheet is composed of an intermetallic compound layer which exists in a region in which a part of a coated layer exists before the joining and an aluminum melted and solidified part which also exists on the side of the aluminum sheet to enclose the intermetallic compound layer. The atoms existing on the surface of the aluminum melted and solidified part are intermetallic-bonded with atoms which exist on the surface of the steel sheet except in the region in which the intermetallic compound layer exists seen in the plan view. Further, the area of the intermetallic compound layer is limited to 60% or less of the total area of the joined part at the interface between the aluminum-coated steel sheet and the aluminum sheet. Thus, the area of the aluminum melted and solidified part exceeds 40% of the total area of the joined part. The strong joining having a high fracture energy can be provided at a high efficiency.