| 摘要 |
PURPOSE:To obtain a titled material cheap and easy to manufacture and high in conductivity of electricity and heat by making an intermediate covering layer and the same metal a base on copper alloy, and providing a surface covering layer in which oxides, carbides, nitrides or carbonitrides are diffused. CONSTITUTION:An intermediate covering layer made of metal or alloy is provided on a base metal of copper alloy made by adding metals such as Cr, Zr etc. or dispersing oxides such as Al2O3 etc. in the base of copper, and a surface covering layer of diffusion type alloy made by diffusing oxides, carbides, nitrides or carbonitrides in the base of metals or alloys same as those constituting above- mentioned intermediate covering layer is provided on the intermediate covering layer, and a material of electrode for welding having high conductivity of electricity and heat, difficultly deposited and deformed, small in wear, and does not cause excessive heat generation at the tip of the electrode is obtained. Proper thickness of above-mentioned intermediate and surface covering layers is 0.5- 100mu and 5-100mu respectively, and Co, Cr, W, Mo are used suitably for the base of above-mentioned diffusion type alloy, and carbides of Cr, W, Ti, Ta are used suitably as carbides. |
