PURPOSE: To produce a material for electrical contact points which is hard to cause initial melt-sticking by mixing at least one of Ag powder and metallic powder which is hard to form solid solution in Ag as metallic oxide powder and reducing said oxide powder.
CONSTITUTION: After either one or both of Ag powder and metallic powder of Mo, W, Ti, Co, etc. which is difficult to form solid solution in Ag are mixed as metallic oxide powder by using a V type mixer or the like, the metallic oxide powder is reduced while the powder mixture is presintered in a 300W950°C temp. range by using a reducing atmosphere of gaseous H2 or the like. The presintered powder is subjected to compressing and sintering repeatedly, and is then hot extruded and drawn, whereby a wire rod of a material for electrical contact points is obtained. The resultant material for electric contact points is dispersed uniformly and finely with metallic particles which are difficult to form solid solution in Ag in the wire. Said material is hard to cause initial melt- sticking and has excellent characteristics for resisting to melt-sticking.
TSUJI HITOSHI
JPS4928828A | 1974-03-14 | |||
JP30004008A | ||||
JPS5465104A | 1979-05-25 |
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