激光熔覆修复叶片的过渡区力学性能试验研究  

Experimental research on mechanical properties of the blade transition zone by laser cladding repair process

作　　者：徐翔宇 曹阳[1] 王辉[2] 吴动波 XU Xiangyu;CAO Yang;WANG Hui;WU Dongbo(School of Mechanical Engineering,Nantong University,Nantong 226019,China;Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]南通大学机械工程学院,南通226019 [2]清华大学机械工程系,北京100084

出　　处：《现代制造工程》2021年第9期118-123,共6页Modern Manufacturing Engineering

基　　金：佛山产学研合作协同创新专项项目(2019THFS0)。

摘　　要：利用激光熔覆技术在TC4钛合金叶片表面上使用TC4粉末进行增材制造,通过相关试验进行了TC4钛合金激光熔覆区和过渡区的微观组织、拉伸力学性能和冲击韧性研究。试验结果表明:基体和熔覆区达到了良好的冶金结合效果;熔覆区和过渡区之间的力学性能受温度影响非常显著,在横纵方向上略有差异;过渡区的冲击韧性值高于熔覆区,表明过渡区拥有更好的抗冲击性能;熔覆区和过渡区的力学性能达到航空钛合金使用标准,说明将激光熔覆技术应用于TC4叶片修复具有一定的可行性。Based on laser cladding technology,the surface of TC4 titanium alloy blade was deposited by TC4 titanium powder.The microstructure,tensile properties and impact toughness of the laser cladding zone and transition zone of TC4 titanium alloy were studied through related experiments.The experimental results indicate that the substrate and the laser cladding zone achieves a good effect of metallurgical bond;the mechanical properties between the laser cladding zone and the transition zone are significantly affected by temperature,and there are slight differences in the horizontal and vertical directions;the impact toughness of the transition zone is higher than that of the laser cladding zone,indicating that the transition zone has better impact resistance.The mechanical properties of the laser cladding zone and the transition zone meet aviation standards,which indicates that the method of blade repair using laser cladding technology is feasible.

关 键 词：修复工艺 TC4钛合金叶片 激光熔覆 微观组织 拉伸性能 冲击韧性 

分 类 号：TN249[电子电信—物理电子学] TG115[金属学及工艺—物理冶金]