In this paper, the thermal analysis of the high-power diode laser hardening process was modeled on AISI 4130 steel. Afterward, the depth and width of hardness were predicted based on the complete austenite temperature (AC₃). Due to the dimensions and output beam power of the diode laser stack (DLS), it is impossible to achieve the suitable power density (10³-10⁵ W/cm²). Furthermore, the output intensity profile of the DLS is not homogeneous because of the pitch between the emitters. Thus, to achieve a suitable power density and a uniform beam profile, an optical layout was designed. The beam profile was experimentally obtained by a beam profiler at different distances from the focal plane and was compared with the modeling results. Due to the agreement between the modeling and experimental results, the intensity value of each mesh of the laser profile was extracted from the ZEMAX software. Then, for the thermal analysis of the laser hardening process (LHP), it was entered as a heat flux input into the COMSOL Multiphysics software.

在本文中，以AISI 4130钢为模型对大功率二极管激光淬火过程进行了热分析。然后，根据奥氏体的完全温度（AC ₃）预测硬度的深度和宽度。由于二极管激光器堆栈（DLS）的尺寸和输出光束功率，不可能达到合适的功率密度（10 ³ -10 ⁵ W / cm ²）。此外，由于发射器之间的间距，DLS的输出强度分布不均匀。因此，为了获得合适的功率密度和均匀的光束轮廓，设计了光学布局。光束轮廓是通过光束轮廓仪在距焦平面不同距离处通过实验获得的，并与建模结果进行了比较。由于建模和实验结果之间的一致性，因此从ZEMAX软件中提取了激光轮廓的每个网格的强度值。然后，为了对激光硬化过程（LHP）进行热分析，将其作为热通量输入到COMSOL Multiphysics软件中。