在金属的激光加热过程中,理论上认为吸收率与温度相关,但由于吸收率影响因素的复杂性,在实际应用中往往将吸收率作为常数处理。针对这两种吸收率模型建立了空间轴对称有限元计算模型,在平均功率相等的前提下分别模拟了连续激光和重复频率长脉冲激光(脉宽为1 ms,脉冲频率分别为25 Hz,50 Hz和100 Hz)对于铝板的加热过程,对比了两种吸收率模型对于激光热作用效果的影响,并据此给出了在实际应用中通过数值计算确定吸收率时的一些建议,其中固-液相变过程使用热焓法处理。 In the metal laser heating process, the theory that the absorption rate and temperature-related, but due to the complexity of the factors affecting the absorption rate, in practice, the absorption rate is often treated as a constant. A space axisymmetric finite element model was established for these two absorption rate models. The continuous laser and repetitive frequency long pulse laser (pulse width 1 ms, pulse frequency 25 Hz, 50 Hz and 100 Hz). For the heating process of aluminum plate, the influence of the two absorption rate models on the heat effect of the laser is contrasted. Some suggestions are given for the determination of the absorption rate by numerical calculation in practical applications. The solid- Liquid phase change process using the heat treatment.