Nickel-base alloy coating was prepared by high frequency and
medium frequency induction cladding respectively. Experiments
were performed with inductors of different cross section shape and technique parameters. The microstructure and properties such as corrosion resistance and wear resistance are compared. The results show that:(1)Heating is faster by high frequency incudtion heating than by medium induction heating. Less chromium-poor structure, in which the concentration of chromium is little, in the coating and minor thermal affect on the matrix are observed for high frequency induction than that for
medium frequency induction cladding;(2)The coating of specimens have to be preheated to 200℃ before induction heating and it is better to use single turn inductor;(3)Corrosion resistance of Ni60 coating by high frequency induction cladding is higher than that by oxygen-acetylene wedding;(4)Wear resistance of GNi-WC25 coating by high frequency induction cladding is higher than that by laser cladding and
oxygen-acetylene spray wedding.