Influences of Heat Treatment Process on Properties of Electroless Plating Ni-W-Mo-P Alloy

The influences of heat treatment process on the bonding strength,porosity,microhardness,wear resistance,corrosion resistance,corrosion potential and the oxidation resistance of electroless plating Ni-W-Mo-P were investigated using microhardness tester,optical microscope and electro-chemistry methods.The results show that the maximum hardness(about 960HV)and good wear resistance of Ni-W-Mo-P plating are obtained when heat-treated at 400℃for 1 h.However,its corrosion resistance is worse.Furthermore,its microhardness is obviously improved after heat-treating at 200℃for 6 h,and up to 1000 HV.After heat-treating at 400℃,the oxidation resistance of Ni-W-Mo-P plating is superior to that without electroless plating 45 steel.