（1. School of Mechanical and Electrical Engineering, China University of Mining and Technology-Beijing, Beijing100083, China; 2. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing100083, China; 3. Zhengzhou Institute, China University of Geosciences (Beijing), Zhengzhou 451283, China;4. Beijing Research Institute of Mechanical & Electronic Technology Co. LTD., Beijing 100083, China）
Abstract：Laser melting deposition process has a strong manufacturing advantage in difficult-to-machine metals
such as nickel base superalloys. In this paper, the effects of scanning path, laser power and scanning speed on the
microstructure and mechanical properties of nickel base superalloys during laser melting and deposition forming
of nickel base superalloys were described, so as to clarify the potential of this process in the field of preparation
and repair of nickel base superalloys. Through the investigation of the microstructure and the formation mecha‐
nism of typical defects of nickel base superalloys formed by laser melting and deposition, it is expected to provide
a theoretical basis for the subsequent adjustment of the microstructure and mechanical properties of nickel base su‐
peralloys prepared by laser melting and deposition.
2023, Vol. 33 
