Abstract
Quenching is a useful heat treatment which changes the mechanical properties of the steels. Because narrow laser beam is irradiated on the surface of the local region, local surface layer is quenched by laser quenching. Carbon is indispensability element for martensite transformation of iron. Laser quenching of low carbon steel with thin carbon layer was investigated in this study. The effect of carbon surface layer on laser quenching was evaluated by the hardness distribution.
