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The influence of different conditions of laser-beam interaction in laser surface hardening of steels

机译：激光束相互作用的不同条件对钢激光表面硬化的影响

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The paper presents the results of laser-beam interaction in laser surface hardening of C45E steel with different types of absorbing coating on specimen surfaces. A photodiode was used to capture IR radiation from the interaction spot between a laser beam and a specimen surface having different absorbing coatings. The influence of laser-hardening parameters, type of absorber and absorbing coating thickness on the IR radiation intensity from the interaction spot was studied. The results confirmed that there was a strong correlation between a voltage signal of the IR radiation and the size of the hardened trace in the surface layer of steel depending on the type of absorber chosen. Changes of the absorbing coating thickness produced changes of the absorptivity of the laser beam, which was confirmed by measurements of the depth and width of hardened traces. For laser surface hardening, the optimum coating thickness of a graphite absorber was determined. A factorial analysis and a method of orthogonal polynomials were used to determine response surfaces for the voltage signal of IR radiation and the depth of the hardened trace achieved.
机译：本文介绍了在试样表面具有不同类型吸收涂层的C45E钢的激光表面硬化过程中，激光束相互作用的结果。光电二极管用于从激光束和具有不同吸收涂层的样品表面之间的相互作用点捕获红外辐射。研究了激光硬化参数，吸收剂类型和吸收涂层厚度对相互作用点红外辐射强度的影响。结果证实，取决于所选择的吸收剂的类型，IR辐射的电压信号与钢表层中的硬化痕迹的尺寸之间具有很强的相关性。吸收涂层厚度的变化产生了激光束吸收率的变化，这可以通过测量硬化痕迹的深度和宽度来确认。对于激光表面硬化，确定了石墨吸收剂的最佳涂层厚度。使用阶乘分析和正交多项式的方法来确定红外辐射的电压信号的响应面和所获得的硬化迹线的深度。

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