This paper introduced the types of surface deterioration of electrical contact materials and finished the experiments of welding resistance for AgCdO,AgSnO 2,AgNi and their different pairings,analysed the changes of surface composition and distribution as well as the relationship between component distribution and the thermal parameter θ mC pρmλ .

The microstructure and properties of Ag/CuO electrical contact materials fabricated by reactive synthesis were studied with XRD,SEM and mechanical property testing.

This paper introduced the status of AgSnO 2 electrical contact material samples made by major factories in our country,through the analysis of the samples test results,we know the quality status of AgSnO 2 electrical contact material in our country.

In recent years nanotechnology was applied in the research and fabrication of electrical contact materials and some favorable eff.

The W-Cu electrical contact materials doping different content of rare earth and its oxide were produced by powder metallurgy technology.

Introduced the characteristics and manufactured methods of the commonly used contact materials in low voltage electric apparatus,as well as their applications.

The paper explains the experiment of smelting silver based electric contact materials and silver based solder by medium-frequency induction furnace with graphite and clay crucible.