COMPOSITE PLATED SLIDING SURFACE

摘要

PURPOSE:To obtain a sliding surface having high lubricity as well as high wear resistance by incorporating silicon carbide and boron nitride each hving a prescried particle size into an Ni alloy film having 5-12% concn. of P formed on the surface of a base so as to harden the film without carrying out heat treatment. CONSTITUTION:Fine particle of silicon carbide having 0.1-1.0mum average particle size, high hardness and wear resistance and fine particles of soft boron nitride having 1-10mum average particle size and self-lubricity are dispersed in a nickel sulfate or nickel chloride bath, and the concn. of P in the bath is adjusted to about 0.5-4%. An Ni alloy film having 5-12% concn. of P and contg. said fine particles is formed on the surface of a base in the resulting electroless Ni plating bath. Thus, the desired sliding surface can be obtd. Since heat treatment is not carried out to harden the film, the base undergoes no reduction in the strength and no change in the dimensions.