Effect Of Process Conditions On Constitution And Property Of Plating Chemical Plated By Ni-W-P Ternary Alloy On42CrMo

With the development of science and technology, people’s requirements about equipmentbecomes higher. because of the simple process and good overall performance, electrolessplating has been widely used in industry. Currently, Ni-P electroless plating can not meet thepeople’s needs, People began to be committed to the introduction of other alloying elements, inorder to obtain nickel-based alloys with special properties, improve the physical and chemicalproperties of the Ni-P alloy coating. Process conditions is one of the important factors that affectthe coating performance. Therefore, in order to obtain a good overall performance coating,process conditions must be strictly controlled.This article studied about the pretreatment、formula、process conditions of Ni-W-P alloycoating which affect the coating’s performance. We can get the recipe by orthogonalexperiment.By analysis the hardness、corrosion resistance and wear resistance, we can get thebest plating process.Experimental results show that Ni-W-P alloy coating is mixed crystalline. After heattreatment, It turn into crystalline. The best crafts of Ni-W-P alloy coating is as follows: pH is8.0;temperature is85℃；loading proportion is0.64dm2/L. In this condition, the hardness of thecoating is2.3times higher than the matrix; the wear resistance of the coating is3.15times higherthan the matrix; In acid solution, the corrosion resistance of the coating is1286.75times higherthan the matrix; In the salt solution, the corrosion resistance of the coating is8.04times higherthan the matrix; After heat treatment of400℃×1h, hardness and wear resistance reached2.72and6.56times higher than the matrix; corrosion resistance reached98.28and3.94timeshigher than the matrix.