Sliding electrical contact material containing rare earth and electrical contact metal composite material

Abstract

The invention relates to a sliding electrical contact material containing rare earth, which comprises the components by mass percent: 0.5-1.5% of Pd, 3.0-9.0% of Cu, 0.2-0.9% of Ni, 0.02-0.50% of rareearth elements and the rest of Ag. The material has good wear resistance and arc resistant capability, so as to be excellent sliding electrical contact material, thus being suitable for manufacturinga commutator of a DC motor.

Description

Technical field [0001] The invention relates to a sliding electric contact material, in particular to a sliding electric contact material containing rare earths and an electric contact metal composite material. Background technique [0002] The load received by the sliding electrical contact material in the working process is very complicated. Especially under the working conditions of the micro-motor commutator and the brush piece assembly, its main load is the sliding wear under the load condition, but at the moment of current commutation, the commutator and the brush piece will be disconnected, so There is a "close-open" transformation. As the motor speed increases, the frequency of this transformation increases, and the resulting arc effect cannot be ignored. The electrical contact material is therefore subjected to the dual effects of sliding wear and arc erosion. At the same time, the high temperature generated by the action of mechanical friction and electric current dur...

AI Technical Summary

Problems solved by technology

However, the addition of rare earths to AgPdCuNi alloys to improve the service life of the material under high temperature and load conditions has not been reported.