| 摘要 |
PURPOSE:To easily obtain Ni and Ni alloy parts each having a surface layer having superior wear resistance, smoothness and corrosion resistance by forming a surface layer contg. Cr2O3 produced by the conversion of a Cr compound by heating as the principal component on the surface of a base material contg. Ni as the principal component. CONSTITUTION:A soln. contg. CrO3 as the principal component is applied to the surface of a base material made of Ni or an Ni alloy and the base material is baked by heating to about 500-600 deg.C to carry out oxidation treatment. Thus, a surface layer contg. Cr2O3 produced by the conversion of the CrO3 as the principal component and having a part where Cr2O3 reacted with the base material is present on the boundary between the surface layer, and the base material is easily and firmly formed on the surface of the base material without deteriorating the base material. The surface layer is dense, has high hardness, bonds firmly to the base material for parts and does not cause stripping. |
