A kind of high-performance special copper-based contact material and preparation process thereof

Abstract

The invention discloses a high-performance special material for a copper-based contact. The high-performance special material is mainly composed of rare earth, tungsten carbide, chromium, graphite, a beryllium copper alloy and copper. The main components include, by mass percentage, 0.05%-0.4% of the rare earth (RE), 0.1%-6% of the tungsten carbide, 1.5%-5% of the chromium, 0.01%-3% of the graphite, 5%-10% of the beryllium copper alloy and the balance copper. Through smelting, cooling, heat insulating and heat mechanical treatment, the prepared copper-based material has the optimal mechanical performance and electric conductivity, the oxidation rate is low, temperature rising is slow, and the contact resistance is low.

Description

technical field [0001] The invention relates to the field of materials for low-voltage electrical contacts, in particular to a high-performance special copper-based contact material and a preparation process thereof. Background technique [0002] Electric contacts undertake the tasks of connecting, carrying current, breaking and isolating in low-voltage switching appliances, and their quality and reliability directly affect the reliability of the electrical appliances in the entire electrical system. The quality of the electrical contact material is a key factor in the performance of the electrical contact. At present, most of the electrical contact materials of low-voltage electrical appliances are made of silver-based alloy materials. According to relevant statistics, 25% of the world's silver output is used to manufacture electrical contact components required by electrical and electronic instruments. Silver is a non-renewable, low-yield precious metal, and its resources...

AI Technical Summary

Problems solved by technology

At present, there are still some obstacles in many copper-based contact materials, which affect the electrical contact performance: many studies have increased the effect of electron scattering while improving the mechanical properties, thereby reducing the conductivity; At the same time, it has not solved the problem of severe oxidation of the contacts due to arc ablation and the increase of film resistance and shrinkage resistance caused by uneven surface, which leads to aggravated temperature rise.

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