ELECTRODE CONTACT MEMBER OF VACUUM CIRCUIT BREAKERS AND A METHOD OF MANUFACTURING THE SAME

摘要

The contact member has a finely-dispersed Cr layer 2 having a thickness between 500 μm and 3 mm formed on the surface of a Cu—Cr alloy base material 1 through surface treatment by friction stir processing. The Cu—Cr alloy base material 1 contains 40 to 80 wt-% of Cu and 20 to 60 wt-% of Cr. The surface of the finely-dispersed Cr layer 2 is planarized after the surface treatment.