激光强化温度场的数值模拟与校验

Simulation and verification of the temperature field in laser hardening

摘要: 采用MSC.Marc非线性有限元软件,对激光强化过程中的温度场进行数值模拟,分析了能量密度的变化对激光强化效果的影响。通过温度传感器测量激光强化时材料表面温度的变化来验证数值模拟的结果。模拟值与实测值基本吻合。结果表明,数值模拟结果可作为激光加工工艺参数选择的依据。

Abstract: We introduce the external-cavity semiconductor laser with feedback of Littrow configuration. The spectral line width is narrowed to be less than 1.2MHz and the output stability is remarkably enhanced. We also propose a new complex-cavity method which can greatly narrow the line width of a semiconductor laser.