基于响应面的装备零件再制造激光熔覆工艺参数优化

为了优化装备零件再制造激光熔覆工艺参数, 提高熔覆层的质量, 选取激光功率 (A), 送粉量 (B), 扫描速度 (C) 为优化变量, 将熔覆层高度 (H) 和宽度 (W) 作为响应指标, 基于响应面分析法, 利用Design-Expert软件设计中心复合实验, 对实验结果进行方差分析, 建立工艺参数相对于响应指标的回归预测模型。通过分析建立的摄动图与3D响应面, 结果表明:激光功率与送粉量对于熔覆层高度和宽度的影响最为显著, 同时送粉量与扫描速度、激光功率与送粉量的交互作用分别对于熔覆层高度和宽度有显著影响。装备零件再制造激光熔覆的最优工艺参数为:激光功率3.94 kW, 送粉量60 g/min, 扫描速度4mm/s。

Optimization of Laser Cladding Conditionsin Response Surface Method for Repairing Damaged Alloy Parts

The influence of the laser cladding conditions for repairing damaged alloy parts, including the laser power, powder feed-rate and scanning speed, on the height and width of the cladded layer was investigated in response surface method.First, the center composite experiment was designed with Design-Expert software; next, the experimental data were analyzed; and finally, the established perturbation map and 3D response surface were derived.The results show that the impact factors of the laser cladding conditions can be listed in a descending order:laser power > powder feed-rate > scanning speed; and that the correlation between the powder feed-rate and scanning speed and the relation between the laser power and powder feed-rate also have a major impact.The optimized laser cladding conditions were found to be a laser power of 3.94 kW, a powder feeding-rate of 60 g/min and a scanning speed of 4 mm/s.