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:
Jun. 25, 2013
Filed:
Jun. 06, 2007
Shingo Mukae, Fukuoka, JP;
Kenji Okamura, Fukuoka, JP;
Shuichi Teramoto, Fukuoka, JP;
Jun Kurobe, Hyogo, JP;
Hiroshi Asada, Hyogo, JP;
Shouji Inoue, Hyogo, JP;
Shigeo Matsubara, Tokyo, JP;
Shingo Mukae, Fukuoka, JP;
Kenji Okamura, Fukuoka, JP;
Shuichi Teramoto, Fukuoka, JP;
Jun Kurobe, Hyogo, JP;
Hiroshi Asada, Hyogo, JP;
Shouji Inoue, Hyogo, JP;
Shigeo Matsubara, Tokyo, JP;
Nippon Tungsten Co., Ltd., Fukuoka, JP;
Nisshin Steel Co., Ltd., Tokyo, JP;
Abstract
Provided is an electrode () which has a double structure including Cu or a Cu alloy as an electrode body () and a core material () made of W, Mo, a W-based alloy, or a Mo-based alloy embedded in a surface of the electrode body () which is abutted against a material to be welded, the core material () being formed by using W, Mo, the W-based alloy, or the Mo-based alloy which is in the form of a fibrous structure extended by sintering, swaging, and annealing in an electrode axis direction, the fibrous structure having a horizontal cross-sectional average particle diameter of 50 μm or more and an aspect ratio of 1.5 or more. The electrode () can be used as an inexpensive electrode obtained by suppressing particle dropping/attrition and defects in electrodes for spot welding, in which heat and pressure are applied repeatedly, stably enhancing durability.