In this work a reliable and simple model to predict the hardness behavior in the surface layer during laser heat treatment is presented, the main advantage introduced by the model is to predict the smooth transition of the hardness and to be computationally efficient.An analysis of the austenization models found in literature is presented and an original algorithm is presented, based on a diffusion controlled parameter I_pa with a threshold uniformly distributed in the material. The carbon diffusion on a relatively long path between grains is neglected to improve the efficiency and the threshold values for AISI 1045 and AISI 1067 were experimentally obtained.The accuracy of the model was proved by means of experimental comparisons obtained with different laser powers and scanning speeds.
Laser hardening of hypo-eutectoid steels: an effective and efficient model / Orazi, Leonardo. - STAMPA. - 1:(2009), pp. 49-52. (Intervento presentato al convegno 9th AITeM Conference - Enhancing the Science of Manufacturing tenutosi a Torino nel 7-9 September, 2009).
Laser hardening of hypo-eutectoid steels: an effective and efficient model
ORAZI, Leonardo
2009
Abstract
In this work a reliable and simple model to predict the hardness behavior in the surface layer during laser heat treatment is presented, the main advantage introduced by the model is to predict the smooth transition of the hardness and to be computationally efficient.An analysis of the austenization models found in literature is presented and an original algorithm is presented, based on a diffusion controlled parameter I_pa with a threshold uniformly distributed in the material. The carbon diffusion on a relatively long path between grains is neglected to improve the efficiency and the threshold values for AISI 1045 and AISI 1067 were experimentally obtained.The accuracy of the model was proved by means of experimental comparisons obtained with different laser powers and scanning speeds.
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