Study on microstructure and mechanical properties of laser repaired layer of 2Cr13 turbine blade
2Cr13 turbine blades were repaired by laser direct metal deposition (DMD) forming. The microstructure and mechanical properties of laser-repaired layer (LRL) were examined. The microstructure was observed by optical microscope and phase was analyzed by XRD. The mechanical properties such as microhardness, wear resistance and tensile strength of LRL were studied as well. The results show that the microstructure of LRL is thin fir-tree crystal, and the microhardness of the specimens distributed from 350HV0.2 to 500HV0.2. The wear resistance increased one time than that of 2Cr13 substrate. The ultimate tensile strength for LRL was comparable to that of the substrate, which increased by 75％ than the substrate. The porosities and microcracks in LRL specimen were successfully eliminated by using DMD forming.
Laser direct metal deposition Microstructure Tensile strength Turbine blade Repairing
Ligang Zhu Jianhua Yao Zhengqiang Zhou Volodymyr S. Kovalenko
Key Laboratory of Special Purpose Equipment and Advanced Processing Technology (Zhejiang University Zhejiang Provincial Electric Power Test and Research institute, Hangzhou, Zhejiang 310014, China Laser Technology Research Institute, National Technical University of Ukraine KPI, Kyiv 252056, Uk
国际会议
宁波
英文
43-50
2010-01-11（万方平台首次上网日期，不代表论文的发表时间）