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Technological Test and Thermal Model for Laser Hardening Process

机译：激光加固过程技术试验与热模型

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In this paper a technological test to predict the hardness generated by the laser hardening process is presented: a cylindrical steel rod is exposed to the diode laser beam on one of its flat surfaces. A hardness test can be executed along the rod axis in order to obtain the hardness value as function of the distance from the exposed surface. In order to identify the thermal cycle undergone by each section of the rod a specific mono dimensional thermal model was developed. Consequently, the comparison between the results of the hardness profile and the thermal field evaluated by means of the analytical model could be performed. Results show that the hardness profile is strongly dependent on the thermal cycle, as expected. This relationship is the key element for the optimal selection of process parameters in industrial situations. In fact, the thermal field can be easily derived by means of numerical or analytical models, and the obtained relationship can be used to derive the hardness field that can be observed as function of this thermal field. Therefore, the proposed test and thermal model are fundamental for a conscious and effective process parameter selection.
机译：在本文中，提出了一种技术试验，以预测由激光硬化过程产生的硬度：圆柱形钢棒在其平面之一上暴露于二极管激光束。可以沿杆轴执行硬度测试，以便获得与距暴露表面距离的距离的硬度值。为了通过杆的每个部分识别热循环，开发了特定的单尺寸热模型。因此，可以执行借助于分析模型评价的硬度曲线的结果与借助于分析模型的热场之间的比较。结果表明，如所预期的那样，硬度曲线强烈依赖于热循环。这种关系是工业情况下最佳选择过程参数的关键要素。实际上，热场可以通过数值或分析模型容易地导出，并且所获得的关系可用于导出可以观察到作为该热场的功能的硬度场。因此，所提出的测试和热模型是有意识和有效的过程参数选择的基础。

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