TA2合金激光熔覆自润滑复合涂层组织与摩擦学性能

发布时间：2018-05-24 23:09

本文选题：激光熔覆 + TA合金　；参考：《摩擦学学报》2017年01期

【摘要】：以三种不同质量分数配比为40%Ti 19.5%Ti C 40.5%WS_2、40%Ti 25.2%Ti C 34.8%WS_2、40%Ti 29.4%Ti C 30.6%WS_2的复合粉末为预置原料,采用激光熔覆技术在钛合金TA2表面原位合成自润滑耐磨复合涂层.系统地分析了涂层的物相、组织、显微硬度及其摩擦学性能与机理.结果表明:三种涂层的显微硬度分别为HV_(0.5)927.1、HV_(0.5)1007.5和HV_(0.5)1052.3,相对于基体(HV_(0.5)180)有极大的提高;三种涂层的摩擦系数和磨损率分别为0.41和30.98×10~( 5) mm~3/(N·m);0.30和18.92×10~( 5) mm~3/(N·m)以及0.34和15.98×10~( 5) mm~3/(N·m).WS_2质量分数为34.8%和30.6%的预置粉末制备的涂层表现出较好的耐磨减摩性能,其磨损机理为轻微的塑性变形和黏着磨损.
[Abstract]:The self-lubricating and wear-resistant composite coatings were synthesized by laser cladding technique on the surface of titanium alloy TA2 by laser cladding with three different mass fraction ratios of 40%Ti / 19.5%Ti C _ (45. 5) and 25.2%Ti C / 25.2%Ti C / W / W C / W / W / C composite powders as preset raw materials. The phase, microstructure, microhardness, tribological properties and mechanism of the coating were systematically analyzed. The results show that the microhardness of the three coatings is HVA0.5 / 927.1HZ 0.51007.5 and HVS 0.51052.3, respectively, which is much higher than that of the substrate HVS (0.5 / 180). The friction coefficient and wear rate of the three kinds of coatings were 0.41 and 30.98 脳 10 ~ (5) mm~3/(N / m and 18.92 脳 10 ~ (5) mm~3/(N / m, respectively, and the coatings prepared by 0.34 and 15.98 脳 10 ~ (5) mm~3/(N m).WS_2 / mass fraction of 34.8% and 30.6% respectively showed good wear resistance and friction reduction properties. The wear mechanism is slight plastic deformation and adhesive wear.
【作者单位】：中南林业科技大学流变力学与材料工程研究所;苏州大学机电工程学院;
【基金】：国家自然科学基金委员会-中国民航局民航联合研究基金(U1533101) 武汉理工大学材料复合新技术国家重点实验室开放基金(2017-KF-5) 苏州市科技计划项目(SYG201635)资助~~
【分类号】：TG174.44

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