Laser rapid manufacturing of special pattern Inco 718 nickel based alloy component

Laser rapid manufacturing based on laser cladding is a novel layer additive manufacturing technology, which can be well used for producing specific material, geometry and properties components normally unavailable or very costly by conventional methods. This paper presents a project research work on laser rapid manufacturing of Inco 718 nickel based alloy component with special pattern for aeronautical application. The required pattern Inco 718 nickel based alloy component was manufactured directly by laser deposition with optimized parameters: laser power: 800W, laser beam diameter: 0.8mm, scanning speed: 0.5m/min, powder feeding rate: 3g/min; The basic microstructure of laser deposited sample is directionally solidified columnar structure, with metallurgical bound to the substrate. Laser deposited component has good metallurgical and compositional and hardness homogeneity. The average hardness is about Hv_0.2 440. The tensile strength of the laser deposited Inco 718 sample is respectively 121 and 116 kgf/mm² at room temperature and at 650°C,which are a little bit less than the data of forged Inco 718 plate 142 and 127 kgf/mm² due to its directional solidified columnar structure perpendicular to the tensile test force.