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通过离心铸造法制备了外加WC颗粒增强铁基复合材料环,研究了复合材料环表面工作层内WC颗粒分布、界面结构、基体组织和力学性能以及高速磨损性能。结果表明:采用离心铸造法制备的外加WC颗粒增强铁基复合材料环是由外部WCP/Fe-C工作层和芯部Fe-C合金层组成的复合结构,其复合材料工作层厚度约30 mm,复合材料层中WCP分布均匀,体积分数约80%,复合层硬度80～85 HRA,芯部基体组织为贝氏体、石墨和少量复合碳化物,芯部基体硬度为73～76 HRA,冲击韧性大于10J/cm2,复合材料磨损率远低于高速钢,与WC硬质合金相当。
The WC particles reinforced Fe-based composite rings were prepared by centrifugal casting method. The WC particles distribution, interfacial structure, matrix microstructure and mechanical properties as well as high-speed wear properties were studied. The results show that the WC-reinforced Fe-based composite ring prepared by centrifugal casting is a composite structure composed of an outer WCP / Fe-C working layer and a core Fe-C alloy layer. The working layer thickness of the composite material is about 30 mm , The WCP distribution in the composite layer is uniform, the volume fraction is about 80%, the hardness of the composite layer is 80-85 HRA, the core matrix structure is bainite, graphite and a small amount of complex carbide, the core matrix hardness is 73-76 HRA, Toughness greater than 10J / cm2, composite wear rate much lower than the high-speed steel, and WC hard alloy quite.