Characterization of induction hardened and tempered AISI 1045 steel

ABSTRACT

In this investigation of AISI 1045 steel are tested in two stages. In the first stage of AISI 1045 steel samples, induction boriding and induction hardening of heat treatment typically 800 °C, 900 °C, 1000 °C, 1100 °C, and 1200 °C applied over the course of two seconds. Internal strains maybe mitigated using a 30 min tempering at temperature ranges 300 °C, 500 °Cand 700 °C. After that the samples subjected to the induction hardening, microhardness and tensile strength according to ASTM. The lowest hardness readings are achieved between 800 and 1100 °C, while the maximum hardness of 685HV is reported after heating to 1200 °C and then cooling in water. The second stage involves AISI 1045 steel is treated with low-temperature plasma nitro-carburizing, and its effects are studied. The specimens are treated at temperatures over 430 °C, NCr₂is formed and has an effect on the corrosion resistance property. Increasing the temperature to 450 °C raises the surface hardness to approximately 1000 HV_0.05. Treatment at 400 °C results in superior corrosion resistance compared to untreated steel. According to the results of the experiments, the surface hardness of AISI 1045 steel materials increases with an increase in temperature.

Keywords
Induction Hardening; Quenching; Tempering; Microhardness; Austenitic Stainless Steel; Plasma Nitro-Carburizing