基于焓方法发展的二维轴对称数学模型 ,考虑了激光束能量的时间和空间分布以及材料的变热物性影响 ,模拟了激光加工中材料的传热和相变过程 ,并分别计算了高斯光束及平面圆形光束作用于纯铁时材料内部的气液及固液界面随时间的发展及非稳态温度场演化 Based on the two-dimensional axisymmetric mathematical model developed based on the enthalpy method, considering the time and space distribution of the energy of the laser beam and the influence of the thermophysical properties of the material, the heat transfer and phase transition of the material in the laser processing are simulated, and the Gaussian beam And the evolution of the gas-liquid and solid-liquid interfaces and the evolution of the unsteady temperature field in the material during the application of pure circular iron