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对Ni60/WC自熔合金粉末进行了高能球磨和相应的粉末形貌观察,研究了球磨对其组织和性能的影响。结果表明:球磨前后Ni60/WC自熔合金主要由WC、FeW3C、Cr23C6、Ni3Fe和Ni2B等组成;与球磨前相比,磨碎的WC小颗粒弥散分布在γ-Ni基体上,由于球磨过程中粉末发生氧化,组织中存在大量的孔洞,粉末表面的氧化膜阻碍了元素间的扩散,其过渡层的宽度小于球磨前;球磨后Ni60/WC合金的硬度下降4.49 HRC,密度下降1.336 g/cm3,体积磨损率下降0.62×10-2 cm-3。故在本试验条件下,高能球磨不适合用来提高Ni60/WC自熔合金的性能。
The Ni60 / WC self-fluxing alloy powders were subjected to high-energy ball milling and corresponding powder morphology observation. The effects of ball milling on the microstructure and properties were investigated. The results show that the Ni60 / WC self-fluxing alloy is mainly composed of WC, FeW3C, Cr23C6, Ni3Fe and Ni2B before and after ball milling. Compared with the pre-milling, the WC particles dispersed in the γ-Ni matrix are dispersed. The oxidation of the powder and the existence of a large number of pores in the microstructure, the oxide film on the surface of the powder hinders the diffusion between the elements, and the width of the transition layer is smaller than that of the ball mill. The hardness of the Ni60 / WC alloy decreases by 4.49 HRC and the density decreases by 1.336 g / cm3 , Volume wear rate decreased by 0.62 × 10-2 cm-3. Therefore, under the test conditions, high-energy ball milling is not suitable for improving the performance of Ni60 / WC self-fluxing alloy.