为提高材料的表面硬度和耐磨性，采用化学复合镀在CuZnAl合金表面制备不同WC含量的Ni-P-WC复合镀层，通过扫描电子显微镜观察分析复合镀层的微观形貌，测试复合镀层的耐磨性和显微硬度，分析WC含量对镀层耐磨性的影响规律。结果表明：当镀液中WC的质量浓度为30 g/L时，复合镀层呈均匀的胞状结构和优异的耐磨性。%This paper is motivated by the need for improving the surface hardness and wear resistance of CuZnAl alloy. This study does so by depositing Ni-P-WC composite coating containing different content of WC particles on the surface of CuZnAl shape memory alloys using electroless coating;investigating the microstructure, phase constitutent, microhardness and wear properties of Ni-P-WC composite coating by X-ray diffraction, scanning electron microscope and energy dispersive spectrum; and above all, testing the microhardness and wear properties of Ni-P-WC composite coating by microhardness testing machine and friction wear testing machine and thereby analyzing the effect of WC content. The results show that the Ni-P-WC composite coating is crystal state and boasts a better bonding the matrix well and the homog-enous coating thickness;as in the case of WC content of 30 g/L, WC particles disperse in the coating, thus giving the composite coating a fine cell morphology and the best wear resistance.
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