Al(Ni)含量对钛合金激光熔覆AlNiMoSi复合涂层摩擦学性能的影响  

Effect of Al(Ni) Content on Tribological Properties of Laser Cladding AlNiMoSi Composite Coatings on Ti6Al4V Alloy

作　　者：石皋莲[1] 吴少华[1] 任佳[2] SHI Gao-lian;WU Shao-hua;REN Jia(Department of Precision Manufacturing Engineering, Suzhou Vocational Institute of Industrial Technology, Suzhou 215104,China;School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China)

机构地区：[1]苏州工业职业技术学院精密制造工程系,江苏苏州215104 [2]苏州大学机电工程学院,江苏苏州215006

出　　处：《材料保护》2018年第3期7-10,16,共5页Materials Protection

基　　金：江苏省自然科学基金(BK20160353);江苏省高校自然科学研究面上项目(16KJB460032);江苏高校品牌专业建设工程资助项目(PPZY20158186).

摘　　要：研究含Al、Si元素涂层的摩擦学性能可为其应用提供重要的理论参考。以Al、Ni、Mo、Si粉末为原料,采用激光熔覆技术在Ti6Al4V合金表面制备了Al质量分数分别为20%(Ni的为40%),30%(Ni的为30%),40%(Ni的为20%)的AlNiMoSi复合涂层,分别命名为20Al、30Al、40Al复合涂层。采用XRD、SEM和EDS分析了涂层的物相和显微组织,并测试了复合涂层的干滑动磨损性能。结果表明:20Al、30Al和40Al复合涂层的平均摩擦系数和磨损率分别为0.380,0.258,0.325和9.36×10^(-5),8.43×10^(-5),1.05×10^(-4)mm^3/(N·m),30Al复合涂层的磨损性能最好,主要是因为该涂层中TiC和Ti3Al含量较高;20Al和40Al复合涂层的磨损机理主要为黏着磨损和磨粒磨损,30Al复合涂层的磨损机理主要为轻微的磨粒磨损。The AlNiMoSi composite coatings with 20%（ mass fraction, similarly hereinafter） Al（40%Ni）, 30%Al（30%Ni） and 40%Al（ 20% Ni） were fabricated by laser cladding technology and using Al, Ni, Mo and Si powders as raw materials. Based on At content of coatings, the obtained coatings were named as 20Al,30Al and 40Al, respectively. In addition, the phase composition and microstrueture of coatings were characterized by XRD, SEM and EDS. The dry sliding wear tests of the composite coatings were evaluated. Results showed that the average fric- tion coefficients and wear rates of 20Al, 30Al and 40Al composite coatings were 0.380, 0.258, 0.325 and 9.36×10^-5 , 8.43×10^-5, 1.05×10^-4 mm^3/（ N · m）, respectively. Among them, 30Al composite coating had the best anti-wea performance, owing to its higher contents of TiC and Ti3Al. Besides, the wear mechanisms of 20Al and 40Al composite coatings were adhesion wear and abrasive wear, while that of 30Ai composite coating was slightly abrasive wear.

关 键 词：激光熔覆 AlNiMoSi复合涂层 摩擦磨损 Al(Ni)含量 TI6AL4V合金 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]