关键词: 激光熔覆, 灰色关联分析, 自适应混沌差分进化, 工艺参数优化, 多道搭接

Abstract: The process of multi-track laser cladding is complex and coupling,and the quality of the cladding layer is directly affected by the process parameters.To determine the optimal process parameters,multi-track laser cladding M2 alloy powder on the surface of 45 steel was taken as an example.According to the effects of process parameters on the width,surface roughness and dilution rate of the cladding layer,the corresponding center composite experiments were designed.The comprehensive evaluation degree of cladding layer quality was established by Grey Relational Analysis (GRA),the multi-objective optimization problem was transformed into a single objective,and the prediction model was established by Response Surface Methodology (RSM).Adaptive Chaos Differential Evolution (ACDE) algorithm was used to optimize the process parameters to maximize the comprehensive evaluation degree.The experiment results showed that the proposed method was effective,the optimal cladding layer width,surface roughness and dilution could be obtained by using the optimized process parameters,which was helpful to improve the quality of the cladding layer.

Key words: laser cladding, grey relational analysis, adaptive chaotic differential evolution, process parameter optimization, multi-track joined