Multiple copper-based electrical contact alloy material

Abstract

The invention discloses alloy material of a multiple copper-based electric contact, which is novel material for electric contact formed by taking metal cupper as the basis, adding a plurality of metals and rare earth elements and applying two phases or multiple phases after casting the alloy. The content of each element according to a weight ratio is 7%-25% for nickel, 1%-15% for titanium, 1%-6% for cobalt, 0.1%-2% for molybdenum, 0.002%-0.2% for rare earth element, and the rest for copper. The alloy material is characterized by: (1) low contact resistance, abrasion resistance, corruption resistance, small arc, long service life which is larger than 1 million times when the material is used as a negative electrode; (2) realizing manufacture directly by melting, simple manufacture method; (3) no heavy metal elements such as cadmium or lead which dangers the environment; (4) no noble metal or rare metal such as gold, silver, platinum or rhodium, a low cost which is much lower than that of the silver-based alloy material. The alloy material is mainly used in electric devices of a DC low voltage (which is equal to or less than 36V), such as automobile electric devices, household electric devices, etc.

Description

technical field [0001] The present invention relates to copper-based alloys, and more particularly to copper-based alloys with nickel as a minor component. Background technique [0002] At present, the electrical contact materials used in the electrical industry are mainly silver-based contact materials. Among them, silver cadmium oxide is the most widely used and the largest output electrical contact material in China. Due to its excellent arc corrosion resistance, welding resistance and low contact resistance, silver cadmium oxide material has long been considered as the best contact material, and is widely used in various low-voltage electrical appliances, and is called universal contact . According to the application requirements, the mass fraction of cadmium oxide (CdO) in the silver cadmium oxide material ranges from 9% to 15%. The main preparation techniques of the silver cadmium oxide material include powder metallurgy and internal oxidation. However, as a preciou...

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Problems solved by technology

From the cost analysis, in the metal raw material market, the price of metal silver is more than 7 times higher than that of copper! It can be seen that its cost is very high, and the processing technology is complicated