TOOL FOR FRICTION STIRRING TREATMENT AND CONTACT MATERIAL FOR VACUUM VALVE

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PROBLEM TO BE SOLVED : To micronize Cr particles by applying friction stirring treatment to a surface of a Cu-Cr-based alloy. SOLUTION : A tool for friction stirring treatment is provided with a shaft 1 fixed to a rotating device, a base 2 fixed to an end of the shaft 1, and a tip part 3 which is fixed to the base 2 and has a stirring groove 4 on the circumference thereof diagonally crossed to the axial direction. The tip part 3, which employs one of W, Mo, W-Re, and Mo-Re as a base material, and contains hard ceramic particles that is harder than the base material dispersed therein, frictionally stirs the Cu-Cr-based alloy chiefly used for a vacuum valve to micronize the Cr particles. COPYRIGHT : (C)2011, JPO&INPIT