Abstract
The effects of addition of Cu, Cr and W on the wear resistance and bending strength of the Ni-M3B2 (M=Ni, Cr, Mo, W) two phase alloy were investigated. The wear resistance and bending strength of the alloy were improved by the addition of Cu, Cr and W. The optimum alloy composition was found to be Ni-3.6mass%B-29.3mass%Mo-15mass%Cr-2mass%Cu-18.7mass%W. The wear resistance of the alloy with the optimum composition was superior to the conventional Ni-based wear resistant alloy with the composition of Ni 3mass%B-13.5mass%Cr-4.8mass%Fe-0.8mass%aC. Also, the bending strength of the present alloy showed 1.81 GPa. Furthermore, the corrosion resistance of the present alloy in 6% HNO3 aqueous solution and 10% HCI aqueous solution, was 70 times and 7 times higher respectively, than that of the conventional Ni-based wear resistant alloy. Therefore, the present alloy is expected to be a new corrosion and wear resistant alloy.
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