This paper deals with laser surfaces hardening process of martensitic stainless steel. The heat machined components are cylindrical shaped with a thin thickness. The heat treated area is larger than the laser spot dimension and for this reason multi-tracks or virtual spot technique are needed in order to process the whole surface. The typical problems of such a hardening method, concerning quenching and tempering involved phenomena, are faced and scanning strategies optimization are considered.The process optimization has been carried out by using a Laser Hardening Simulator (LHS) developed by the Authors. LHS allows to simulate the laser-material interaction in order to calculate the heat cycle into the bulk material and then the resulting micro-structures after the heat treatments according to laser scanning trajectories.
Laser Hardening of Large Cylindrical Martensitic Stainless Steel Surfaces / A., Fortunato; Orazi, Leonardo; G., Campana; A., Ascari; Cuccolini, Gabriele; G., Tani. - STAMPA. - (2009), pp. 421-426. (Intervento presentato al convegno Laser in Manufacturing 2009 tenutosi a Munich nel June, 15-18 2009).
Laser Hardening of Large Cylindrical Martensitic Stainless Steel Surfaces
ORAZI, Leonardo;CUCCOLINI, Gabriele;
2009
Abstract
This paper deals with laser surfaces hardening process of martensitic stainless steel. The heat machined components are cylindrical shaped with a thin thickness. The heat treated area is larger than the laser spot dimension and for this reason multi-tracks or virtual spot technique are needed in order to process the whole surface. The typical problems of such a hardening method, concerning quenching and tempering involved phenomena, are faced and scanning strategies optimization are considered.The process optimization has been carried out by using a Laser Hardening Simulator (LHS) developed by the Authors. LHS allows to simulate the laser-material interaction in order to calculate the heat cycle into the bulk material and then the resulting micro-structures after the heat treatments according to laser scanning trajectories.
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