FEM SIMULATION OF DIODE LASER CLADDING USING WIRE FEED

摘要

A 2D FEM model was developed to simulate the laser cladding process with wire feeding for a Cu70Ni30 substrate and cladding wire. Thermal and thermal-mechanical analyses were performed on a single pass clad on a substrate along the cladding direction. The laser power was added by heat flux model with appropriate absorptivity and surface reflection. Two different clad front geometries were investigated to model the process. In both cases, the temperature increased rapidly and then reached steady state in about 25 seconds. The model did predict melting of nodes in the top surface of the substrate. Based on the temperature calculation result, it was found that 2.4% plastic deformation existed in the substrate under the interface leading to a slightly convex final shape. Residual elastic stress was also found in the area of the clad interface.