Y_2O_3对钛合金表面激光熔覆TiC复合涂层组织和耐磨性能的影响  

Effect of Y_2O_3 on Microstructure and Wear Resistantce of Laser Cladding TiC Coating on the Surface of TC4 Titanium Alloy

作　　者：王慧萍[1] 李军[1] 张光钧[1] 戴建强[1] 奚文龙[1] 

机构地区：[1]上海工程技术大学激光工业技术研究所,上海201600

出　　处：《应用激光》2010年第3期199-203,共5页Applied Laser

基　　金：上海市科委攻关资助项目(项目编号:0 8520513400);上海工程技术大学科研资助项目(项目编号:2008xy36);上海市重点学科建设资助项目(项目编号:J51402)

摘　　要：采用HL-5000型横流CO_2激光加工机,通过加入适量的稀土氧化物Y_2O_3在TC4钛合金表面制备了表面较平整、较细密、基本消除了裂纹与孔隙并与基体呈冶金结合的TiC复合涂层。研究了稀土氧化物Y_2O_3对激光熔覆层的显微组织、物相、显微硬度和滑动摩擦磨损性能的影响。结果表明:在本文所述的试验条件下,在熔覆层中添加稀土氧化物Y_2O_3的较佳重量百分比为0.6%,在TC4钛合金表面激光熔覆制备的TiC复合涂层中加入适量的稀土氧化物Y_2O_3,可有效改善熔覆层的组织和性能。The laser cladding TiC composite coating of smooth,fine microstructure eliminating porosities and cracks on the surfact of TC4 alloy by means of adding Y2O3 was gained with 5.0kW continuous wave CO2 laser. Effect of Y2O3 on microstructure, phase of the coating, microhardness and friction wear properties of laser cladding TiC coating were investigated. Results indicate that at the condition of experiment, the best additive mass of Y2O3 is 0.6%. The mierostrueture and properties of laser cladding TiC composite coating with Y2O3 are better than those of laser cladding without re-oxide.

关 键 词：激光熔覆 钛合金 稀土氧化物 显微组织 耐磨性能 

分 类 号：TG156.93[金属学及工艺—热处理]