SILVER COATED COMPOSITE MATERIAL FOR MOVABLE CONTACT AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a silver coated stainless material capable of providing a long-life movable contact in which a silver coated layer is not peeled off even in a repeated switching operation of the contact and the increase of a contact resistance is suppressed even in the long-time use, and to provide a method for producing the silver coated stainless material. SOLUTION: The silver coated composite material for movable contact comprises: a base composed of an alloy mainly containing iron or nickel; a second intermediate alloy layer which is formed on the base and is mainly composed of at least one metal selected from nickel and cobalt, and copper; a first intermediate alloy layer which is formed on the second intermediate alloy layer and is mainly composed of silver and copper; and a coating layer which is formed on at least a part of the surface of the first intermediate alloy layer and is composed of silver or silver alloy. COPYRIGHT: (C)2008,JPO&INPIT