Copper-based contact material and manufacturing process

Abstract

The invention relates to a copper-based contact material and a manufacturing process thereof. The copper-based contact material comprises the following components in percentage by weight: 0.002-0.1 percent of yttrium, 0.002-0.08 percent of bismuth, 0.001-0.5 percent of titanium, 0.001-0.5 percent of molybdenum, 0.001-0.1 percent of tellurium, 0.003-0.5 percent of lanthanum, 0.03-1.0 percent of graphite, 0.01-0.2 percent of aluminum and the balancing percent being copper. With the adoption of rare earth powder metallurgy, the contact material has an obvious strengthening effect on a copper base on the premise of maintaining good electrical conductivity and thermal conductivity as well as low resistivity, improves the electric corrosion resistance and adhesion resistance of a contact, enables the breaking capability of the contact to be strong, and enables the contact to be suitable for higher current breaking; the manufacturing process adopts mixed rolling, pressing, sintering, re-pressing, re-sintering, squeezing and cold rolling, is conducive to the rearrangement and displacement of powder particles, can improve the compactness, moreover, can improve the distribution of the copper base in the contact material components, and improve the corrosion resistance of the contact material.

Description

technical field [0001] The invention relates to a copper-based contact material and a manufacturing process. Background technique [0002] For a long time, silver has played a major role in electrical contact materials, and silver, as a precious metal, is a scarce resource, which once made the cost of electrical contacts high. In recent years, the development of copper-based alloys to replace silver and contact materials that can meet the performance of electrical contacts is an urgent problem to be solved and improved in the industry. [0003] The electrical performance of copper-based contact materials mainly depends on its composition and manufacturing process. Because the powder metallurgy method is easy to control the material composition and quality, it has been greatly popularized and applied in the factory production process. At present, there are two main problems in the production process of copper-based contact materials: 1. How to optimize the composition of cop...

AI Technical Summary

Problems solved by technology

[0002] For a long time, silver has played a major role in electrical contact materials, but as a precious metal, silver is a scarce resource, which once made the cost of electrical contacts high.