In this paper a numerical simulation of laser hardening process is presented. The Finite Difference Method (FDM) was used to solve the heat transfer and the carbon diffusion equations for a defined workpiece geometry. The model is able to predict the thermal cycle into the target material, the phase transformations and the resulting micro-structures according to the laser parameters, the workpiece dimensions and the physical properties of the workpiece. The effects of the overlapping tracks of the laser beam on the resulting micro-structures is also considered. The initial workpiece micro-structure is taken into account in the simulation by a digitized photomicrograph of the ferrite perlite distribution before the thermal cycle. Experimental tests were realized on a C43 plate and the good agreement between the theoretical and experimental results is shown.

Laser hardening process simulation for mechanical parts / Tani, G.; Orazi, L.; Fortunato, A.; Campana, G.; Cuccolini, G.. - 6454(2007), p. 645404. ((Intervento presentato al convegno High Energy/Average Power Lasers and Intense Beam Applications tenutosi a San Jose, CA, usa nel 2007.

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