In this study, it was aimed to improve the surface hardness by applying gas nitriding treatment dual-phase ductile cast iron and produce irons with a good strength-ductility combination. Thus, has been tried develop high wear resistance, strength, ductility. Ductile specimens microstructure consisting of ferrite + martensite were produced oil quenching at 70 °C after intercritical austenitizing...

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 ...

Fatigue is the primary cause of failure of crankshafts in internal combustion engines. The cyclic loading conditions and the stress concentrations in the crank pin fillets are unavoidable, and can result in fatigue failure. The objectives of this study were to compare the fatigue behavior of forged steel and ductile iron crankshafts from a one-cylinder engine as well as to determine if the fati...