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利用ANSYS有限元分析软件建立了选区激光熔化(SLM)的单层多道的三维温度场有限元模型,针对AlSi10Mg铝合金材料进行模拟,研究了扫描速度对AlSi10Mg铝合金选区激光熔化热行为的影响。结果表明:随扫描时间的增加,由于前一扫描道对后一扫描道的热积累效应,后一扫描道上监测点的熔池温度越来越高,尺寸越来越大。随扫描速度的增加,同一监测点的熔池最高温度、尺寸和液相存在时间都逐渐减小,熔池沿扫描方向和垂直扫描方向的温度梯度略微增大。试验结果与数值模拟结果吻合良好。
The finite element model of three-dimensional single-layer multi-channel temperature field of laser selective laser melting (SLM) was established by using ANSYS finite element analysis software. The AlSi10Mg aluminum alloy material was simulated and the effect of scanning speed on laser melting thermal behavior of AlSi10Mg aluminum alloy was studied. . The results show that with the increase of scanning time, due to the heat accumulation effect of the previous scan line on the latter scan line, the temperature of the weld pool at the monitoring point on the latter scan line is getting higher and higher, and the size is getting larger and larger. With the increase of the scanning speed, the maximum temperature, size and liquid phase existence time of the weld pool in the same monitoring point decrease gradually, and the temperature gradient of the weld pool in the scanning direction and the vertical scanning direction increases slightly. The experimental results agree well with the numerical simulation results.