Effect of WC content on microstructure and fribological properties of directional Ni60 coating

Abstract

Abstract: Ni60/WC directional coatings were prepared on 45 steel substrate by flame spraying and induction remelting + forced cooling. The effects of WC mass-fraction(5%, 20%, 35%, 50%) were investigated on microstructure, hardness and tribological properties of directional coatings. The results showed that the dendrites near the interface of the directional coating show a trend of combined preferential growth with the increase of WC mass-fraction. All kinds of hard phases in the directional coating are evenly distributed in the grain boundaries, which plays a role in strengthening the grain boundaries. The hardness of coating showed a positive correlation with the WC mass-fraction,and friction coefficient and wear rate of directional structure coating first decrease and then increase with the increase of WC mass-fraction.

Key words: Ni60 alloy, WC particles, microstructure evolution, microhardness, friction and wear property

CLC Number:

TG149

YIN Xiang, MA Cheng-yan, ZHOU Kai, WANG Xin-min, WANG Yi, WEI Heng-li. Effect of WC content on microstructure and fribological properties of directional Ni60 coating[J]. Journal of Lanzhou University of Technology, 2023, 49(4): 17-23.

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