Multi-ingredient oxide enhanced silver-based electric contact material and preparation method thereof

Abstract

The invention discloses a multi-ingredient oxide enhanced silver-based electric contact material and a preparation method thereof. The material is prepared from the following chemical ingredients in percentage by mass: 6 to 10 percent of Sn, 2 to 6 percent of In,0 to 5 percent of La, 0 to 5 percent of Bi, 0 to 3 percent of Zn, 0 to 3 percent of Sm, 0 to 3 percent of Hf and the balance of Ag. The method comprises the following process steps of proportionally weighing metal with the ingredient proportion; putting the metal into a zirconium oxide crucible; performing vacuum sensing melting and casting to obtain an alloy ingot blank; performing turning processing on the alloy ingot blank to obtain a rod blank; putting the rod blank into a special inner oxidization furnace for pressurization inner oxidization to obtain the multi-ingredient oxide enhanced silver-based electric contact material; performing heat extrusion, room temperature pulling processing to obtain the multi-ingredient oxide enhanced silver-based electric contact material. The multi-ingredient oxide enhanced silver-based electric contact material prepared by using the method has the advantages that the pulling resistantintensity reaches 280 to 340 MPa; the electric life reaches 150 thousand times under the test conditions of AC / 220V / 15A.

Description

technical field [0001] The invention relates to a silver-based electrical contact material, in particular to a pressurized internal oxidation preparation method of a multi-component oxide reinforced silver-based electrical contact material. Background technique [0002] The oxide-reinforced silver-based electrical contact material is a metal-based composite material in which the second-phase oxide particles are dispersed in the silver matrix. It is a kind of electrical contact material for low-voltage electrical appliances that has developed rapidly in recent years. Commonly used at home and abroad single or two oxide reinforced silver-based electrical contact materials (such as AgSnO 2 , AgCuO, AgSnO 2 In 2 o 3 , AgSnO 2 La 2 o 3 etc.) Because of the few types of oxides in the silver matrix and the poor synergistic strengthening effect, the strength of the material is not high, the arc erosion resistance is weak, and the electrical life is short, which limits the prom...

AI Technical Summary

Problems solved by technology

Commonly used at home and abroad single or two oxide reinforced silver-based electrical contact materials (such as AgSnO 2 , AgCuO, AgSnO 2 In 2 o 3 , AgSnO 2 La 2 o 3 etc.) Because of the few types of oxides in the silver matrix and the poor synergistic strengthening effect, the strength of the material is not high, the arc erosion resistance is weak, and the electrical life is short, which limits the promotion of silver-based electrical contact materials in many fields and harsh service conditions application

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