Influence of tempering temperature on mechanical properties of G42CrMo4 cast steel

Abstract

This paper explores the effects of tempering temperatures on the mechanical properties of G42CrMo4 cast steel, a versatile alloy commonly used in automotive and construction industries. Tempering, a critical step in the heat treatment process, aims to reduce residual stresses and enhance material reliability. The study investigates the influence of tempering temperatures (450°C and 600°C) on the steel's strength, ductility, and hardness through a series of experimental investigations, including heat treatment, machining, and tensile testing. Results indicate that while normalization treatment offers moderate strength and good ductility, quenching and tempering at 450°C significantly increase strength at the expense of ductility. Conversely, tempering at 600°C strikes a balance between strength and ductility.