PROTECTING EFFECT OF ELECTROLESS Ni-W-P ALLOY PLATING ON 65Mn STEEL IN HEAT TREATMENT PROCESS

Protecting technique and protecting effect of electroless Ni-W-P alloy plating on 65Mn steel in heat treatment process were studied.At first,the surface of 65Mn steel was enveloped with electroless coating of Ni-W-P alloy.Secondly,the specimen was bathed in salt solution and quenched at 860℃.Finally,the specimen was heated up to 350℃.Through this process,the specimen was not only improved in its mechanical properties,but also strengthened in anti-corrosion ability due to the increase of resistance to HE in heating process.And it had adorning effect like stainless steel’s appearance.The electroless coating had a little effect (about 2%)on its elastic modulus.