Simulation Study on Convergence Properties of Powder Flow in Multi-Channel Laser Cladding Nozzle

The forming size, processing efficiency and comprehensive performance of the cladding layer were closely related to the utilization ratio of powder in the process of laser cladding. Based on the Euler-Lagrange method, the description of metal particles was carried out, a three-dimensional powder flow analysis model was established. The convergence properties of gas-solid two-phase flow after flowing out of the multi-channel cladding nozzle was analyzed. The results indicate that the utilization ratio of metal particles in the direction of the powder feeding tube generally increases with the increase of carrier gas flow rate and the particle velocity. The utilization of deflected particles is not uniformly the same. The smaller particles have higher utilization ratio and temperature.