基于选区激光熔化铜合金温度场的粉末层厚调控研究

Powder layer thickness control based on temperature field of selective laser melting copper alloy

在选区激光熔化(SLM)加工过程中,粉末层厚是选区激光熔化加工中重要的调控参数之一,合理的粉末层厚既可以提高成型质量又可以提高成型效率。基于SLM温度场模型,研究了温度场运动动态过程,预测了温度场温度和熔池大小,并且定量分析了粉末层厚对温度场温度和熔池大小的影响,研究表明:粉末层厚对温度的影响较小,对于熔池长度的影响相对于熔池宽度和深度更为明显。

In the selective laser melting(SLM)process,the powder layer thickness is one of the important control parameters.Reasonable powder layer thickness can improve the molding quality and the molding efficiency.Based on SLM temperature field model,this paper studies the dynamic process of temperature field movement,predicts the temperature of the temperature field and the size of the molten pool,and quantitatively analyzes the influence of powder layer thickness on the temperature of the temperature field and the size of the molten pool.The results show that the powder layer thickness has little effect on the temperature;the effect on the length of the molten pool is more obvious than that on the width and depth of the molten pool.