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为提高AlSi10Mg合金激光选区熔化(Selective laser melting,SLM)成形致密度,利用田口方法对影响致密度的主要因子(激光功率、扫描速度和扫描间距)进行优化研究,结合孔隙形成原因和金相形貌,从能量输入的角度分析各个因子对致密度的影响规律。引入能量密度模型,综合表征能量输入与致密度之间的作用关系。结果表明,三个因子对铝合金SLM成形致密度均有显著地影响,足够的能量密度输入是AlSi10Mg合金SLM成形接近全致密的必要条件,能量密度在4.0~6.0J/mm2范围内时,致密度可达98%以上。
In order to improve the densification density of AlSi10Mg alloy by laser selective melting (SLM), Taguchi method was used to optimize the main factors affecting the densification (laser power, scanning speed and scanning pitch) Appearance, from the perspective of energy input analysis of the impact of various factors on the density. The energy density model is introduced to comprehensively characterize the relationship between energy input and density. The results show that the three factors have a significant effect on the SLM forming density of aluminum alloy. The sufficient energy density input is the necessary condition for the SLM forming of AlSi10Mg alloy to be nearly full density. When the energy density is in the range of 4.0-6.0 J / mm2, Density up to 98%.