| Résumé | Laser polishing is a surface finishing operation in which a superficial layer of material is being redistributed in a controlled manner, typically to achieve a better surface quality. In this study, three-dimensional numerical model has been developed to investigate the formation of remelted line during the laser polishing (LP) of H13 tool steel. To closely mimic the thermophysics of laser line formation, several different heat transfer mechanisms have been included in the simulation. Furthermore, to enhance model accuracy and applicability, experimental calibrations were conducted to determine more accurate representations of material absorptivity, a parameter that is typically assumed as constant in the literature. The experimental validations performed have proved that the model can constitute a reliable alternative to time and cost consuming trial-and-error physical LP experiments that are commonly used to analyze the effect of various process parameters on post-polished surface quality. |
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