Patent ID: 8471169
Filing Date: 2013-06-25
Classification: B23K,C22F

Abstract:
1. An electrode for spot welding, which has a double structure comprising: an electrode body made of Cu or a Cu alloy; and a core material made of W, Mo, a W-based alloy, or a Mo-based alloy embedded in an abutting surface, which is a surface of the electrode body abutted against a material to be welded, wherein W, Mo, the W-based alloy, or the Mo-based alloy forming the core material comprises a fibrous structure extended in an electrode axis direction so that each crystal grain of the W, Mo, the W-based alloy, or the Mo-based alloy has a horizontal cross-sectional average particle diameter of 50-300 μm and an aspect ratio of 1.5 or more.