| 摘要 |
PURPOSE:To improve the wear, seizing and corrosion resistances of the surface of a metallic sliding member by forming an Ni-P-Co alloy layer contg. a specified percentage of dispersed hard particles on the surface of the member. CONSTITUTION:An Ni layer is formed by striking on the surface of a sliding member sliding at a high speed such as a piston ring, and an Ni-P-Co alloy layer contg. 5-30vol% dispersed particles of a hard material such as SiC having 0.5-10mum particle size is formed by plating on the Ni layer to 120mum thickness. The Ni-P-Co alloy consists of 50-88wt% Ni, 2-15wt% P and 10-40wt% Co. The resulting layers are hardened by heating at 200-400 deg.C to form a sliding surface having superior wear, seizing and corrosion resistances. |
