Study on Mlcrostructures and Corrosion-wear Performance of Plasma Surfacing Alloy Deposits

Microstmctures,X-ray diffractions,hardness and wear corrosion resistance of iron based, nickel based and nickel-based WC plasma surfacing alloy deposits on the l6Mn steel were tested.It was shown that the microstructures of alloy deposits were consisted of y phase and some intetmetallic compounds, for example, Fe₂₃(C,B)₆, (Cr,Fe)₇C₃, Cr₇,C₃, NiB and WC etc.Nickel based WC alloy overlay deposits had the highest hardness and wear cornrsion resistance.The wear resistance of alloy overlay deposits in (pH6) acid and NaOH(pH8) liquor media were the lower than that in the neutral water,especially in HC1 acid liquor.