SILVER-CLAD COMPOSITE MATERIAL FOR MOVABLE CONTACTS AND PROCESS FOR PRODUCTION THEREOF

摘要

A silver-clad composite material (100) for movable contacts which comprises a base (110) made of an iron- or nickel-base alloy, an under clad layer (120) formed out of any one selected from among nickel, cobalt, nickel alloys and cobalt alloys on at least part of the surface of the base (110), an intermediate clad layer (130) formed out of copper or a copper alloy on the under clad layer (120), and an outermost clad layer (140) formed out of silver or a silver alloy on the intermediate clad layer (130), with the proviso that the total thickness of the under clad layer (120) and the intermediate clad layer (130) is 0.025 to 0.20µm.