Elektrisches Kontaktmaterial

摘要

A method for forming an electrical contact material comprises the steps of melting a mixture of Cu-Cr into a molten alloy, atomizing the molten alloy into fine particles to obtain alloyed particles. Cr particles in the alloyed powder disintegrate to less than 5 mu m in mean particle diameter. The alloyed powder is sintered thereafter and a mean particle diameter of chromium in the sintered article is fined in a range of 2 to 20 mu m. An electrical contact material is composed of a copper matrix and chromium particles having a mean particle diameter of 2 to 20 mu m. The chromium particles are homogeneously dispersed in the copper matrix.