Silver-based hexabasic alloy electric contact material and preparation method thereof

Abstract

The invention provides a silver-based hexabasic alloy electric contact material and a preparation method thereof. The Ag-based hexabasic alloy electric contact material comprises the following materials by weight: 0.02 to 0.2 percent of nano-graphite, 20 to 25 percent of Pd, 15 to 20 percent of Cu, 5 to 10 percent of Pt, 5 to 10 percent of Au, and Ag in balancing amount. During the preparation, batching, vacuum melting ingoting, cold rolling cogging and intermediate heat treatment are conducted on Au, Pt, Pd, Ag, Cu and nano-graphite, and homogenized aging treatment is conducted on as-cast alloy, so as to obtain the Ag-based hexabasic alloy electric contact material. As nano-graphite is taken as a wild phase material, mixed with other noble metals proportionally, and treated with vacuum melting, the silver-based hexabasic alloy electric contact material has the advantages that the rigidity and the wearing resistance are higher, and the service life is longer; moreover, as the content of Pd is lower, the technical problem that the conventional Pd-based hexabasic alloy electric contact material has a higher content of Pd is solved to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to electrical contact materials, in particular to silver-based six-element alloy electrical contact materials and a preparation method thereof. Background technique [0002] Electric contacts, also known as contacts, contacts or contacts, are contact parts in electrical switches, instruments, etc., and are responsible for the task of connecting, carrying and breaking current. Therefore, its performance directly affects switching electrical appliances and instruments. operational reliability. As an electrical contact material, it is required to have high reliability and corrosion resistance, long durability, and low volatilization loss. Pt, Pd, Au, Ag and their alloys have excellent electrical properties, anti-welding, anti-oxidation, and anti-burning. They are high-reliability electrical contact materials and are widely used in engines, micro-motors, connectors, relays, poten...

AI Technical Summary

Problems solved by technology

Existing Pd-based alloys usually have a high Pd content (about 35%), but due to the low strength and electrical conductivity of Pd, it is easy to oxidize; in addition, Pd is easy to react with organic matter in the environment to form metal complexes, resulting in contact The resistance increases; and during the use of this alloy, the volatilization loss is large, the metal transfer is serious, and its chemical stability, high temperature anti-oxidation volatilization ability, anti-spark anti-arc erosion ability is poor

All these factors will affect the performance of Pd-based alloy electrical contact materials, reducing their service life and reliability

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