Abstract
Made Ni-WC-CEO2 composite coatings of different CEO2 content on 45 steel matrixes by vacuum fusion sintering. The coatings microstructure and the morphology of WC were observed by SEM, the elements diffusion between WC and Ni-base alloy by EDS；The Rockwell hardness of coatings’ surface and micro-hardness of coatings’ longitudinal section were measured by Rockwell hardometer and microhardness instrument. The results showed that: The defects in the coatings become less, WC in the coating is further refined, and its distribution changes uniform with adding content CEO2. When the content of CEO2 is 0.5%, the surface’s hardness and section’s microhardness are the highest, In this paper, the optimum content is 0.5%.
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