SINTERED MATERIAL FOR HIGH-CURRENT SLIDING ELECTRIC CONTACT

摘要

FIELD: metallurgy.SUBSTANCE: invention relates to powder metallurgy, and namely to powder antifriction materials for high-current sliding contacts. It can be used for fabrication of current-collecting brushes, for example unipolar generators or current-collecting shoes contacting a rail of a tunnel railway. Material of the high-current sliding electric contact working in the pair with a steel counter relay with contact current density of more than 100 A/cmincludes the following, wt %: copper 24-57; graphite 2-3; iron is the rest.EFFECT: providing high electric conductivity of the contact and low wear intensity at sliding.1 tbl, 1 ex