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通过添加MoS2固体自润滑相,利用激光熔覆技术在TC4合金基材表面制备TC4/N i/MoS2复合材料,获得冶金质量较好的熔覆层。对激光熔覆层用扫描电境(SEM)进行形貌观察,并进行能谱成分分析,用XRD进行合金物相的表征,用MMG-10型高温高速摩擦磨损试验机对MoS2/Ti基涂层的摩擦性能进行测试。研究结果表明,TC4/Ni/MoS2复合涂层摩擦系数比TC4激光涂层显著降低,高温摩擦系数减小尤为明显,而且随添加MoS2含量的增多,涂层摩擦系数有减小的趋势,对比TC4激光涂层和复合涂层的磨耗,TC4/N i/MoS2复合涂层的磨耗显著低于TC4涂层,其耐磨性提高约9倍。
By adding MoS2 solid self-lubricating phase, the TC4 / Ni / MoS2 composite was prepared on the surface of TC4 alloy by laser cladding, and the metallurgical quality cladding layer was obtained. The morphology of the laser cladding layer was observed by scanning electron microscope (SEM) and the energy spectrum was analyzed. The phase characterization of the alloy was carried out by XRD. The morphology of the alloy was characterized by MMG-10 high temperature and high speed friction and wear tester. The friction properties of the layers were tested. The results show that the friction coefficient of TC4 / Ni / MoS2 composite coating is significantly lower than that of TC4 laser coating and the friction coefficient decreases obviously at high temperature. With the increase of MoS2 content, the friction coefficient of coating decreases. Compared with TC4 Attrition of laser coating and composite coating, TC4 / Ni / MoS2 composite coating wear significantly lower than the TC4 coating, its wear resistance increased by about 9 times.