Parameters optimization of short pulse laser milling Inconel 718 laser deposition manufacturing parts

Abstract

Aiming at the problems of tool wear and poor consistency in the mechanical subtraction of Inconel718 nickel-based superalloy complex structural parts in the laser additive and subtractive manufacturing process. In this paper, the short pulse laser is used to perform precision subtractive processing of Inconel 718 superalloy continuous laser deposition manufacturing (LDM) parts. This paper focuses on the research of short pulse laser milling and scanning technology of Inconel718 LDM. Based on the Response Surface Method, the influence of process parameters such as scanning speed, hatch distance and scanning times on the shape accuracy of the inner channel, surface roughness, material removal rate and recast layer was explored. The optimal milling process parameters are obtained as follows: the laser power is 100 W, the scanning speed is 6000 mm / s, the scanning times are 800, and the hatch distance is 0.02 mm.