ELECTRODE CONTACT MEMBER OF VACUUM CIRCUIT BREAKER AND PROCESS FOR PRODUCTION OF THE SAME

摘要

The invention provides an electrode contact member of vacuum circuit breaker which is obtained by forming a thick Cr fine dispersion layer on the surface of a Cu-Cr alloy base metal and which brings about improved dielectric strength and interrupting performance and a process for easy production of the member though easy formation of a Cr fine dispersion layer. The electrode contact member comprises a Cu-Cr alloy base metal (1) comprising 40 to 80wt% of Cu and 20 to 60wt% of Cr and a Cr fine dispersion layer (2) of 500µm to 3mm in thickness formed on the surface of the base metal (1) through surface treatment by friction stir processing. The Cr fine dispersion layer (2) is subjected to surface flattening treatment prior to use.