Electrophoretic a wear-resistant metal ceramic coating, strengthened by electrolytic nickel plating.

摘要

According to the invention, in order to produce a coating for protection against - wear by friction with reciprocating motion to the mean temperature on a substrate made of steel or of nickel-based superalloy, in particular the following steps are performed: / p & & p a) metal-ceramic electrophoretic deposition of a structure composed of a mixture of 85% to 50% of metal powder and 15% to 50% of ceramic powder, a mixture in which the metal powder is a cobalt based superalloy of the type kc 25 nw or of type m - cr al y, in which m denotes a metal chosen from the group comprising ni, co, fe or a mixture of those - thereof with the possible addition of ta and in which the ceramic powder is chosen from the group formed by the oxides, in particular, al2 o3 and cr2 o3, the carbon atoms, in particular sic or cr3 c2 nitrides, such as bn or tin or borides, in particular, ti, b2 and / p & & p & b) electrolytic prenickeling in an electrolysis bath at a ph between 6 and 8; / p & & p & c) electrolytic nickel plating in an acid bath of the type of sulfamate. / p & & p & application to the parts of the motor is subjected to an alternating friction at a temperature close to or greater than 700 grade (s).