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:
Apr. 05, 2011
Filed:
Mar. 07, 2007
Hidetoshi Fujii, Suita, JP;
Masao Fukusumi, Osaka, JP;
Yoshiaki Morisada, Osaka, JP;
Takeshi Ishikawa, Yokohama, JP;
Hidetoshi Fujii, Suita, JP;
Masao Fukusumi, Osaka, JP;
Yoshiaki Morisada, Osaka, JP;
Takeshi Ishikawa, Yokohama, JP;
Osaka University, Osaka, JP;
Osaka Municipal Technical Research Institute, Osaka, JP;
Tokyu Car Corporation, Kanagawa, JP;
Abstract
In a first step, friction stir welding is performed, while supplying a filler into a joining portion, in order to prevent the coarsening of crystal grains of metal materials in a subsequent fusion processing. Then, a fusion processing such as MIG welding is performed. The filler to be added to the joining portion includes a substance that does not chemically react with the metal materials and has a melting point higher than a melting point of the metal materials and a substance in which a misfit with the metal materials is within ±15%. As a result, the coarsening of crystal grains by the fusion processing is inhibited and the joint strength can be increased.