A study of surface hardening Ductile Iron (DI) with and without austempering heat treatment was developed. The chemical composition the material contains alloying elements such as Cu Ni, that allow to obtain a Grade 120-90-02, based on ASTM A536, which treated be transformed Austempered (ADI). Specimens 10 × 5 mm3 were obtained for application by Nd:YAG UR laser 150 W maximum power. parameters ...