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Characterization of carbon and low-alloy steel after different heat treatments
(University of Belgrade, Technical faculty in Bor, 2022) Stamenković, Uroš; Ivanov, Svetlana; Marković, Ivana
The aim of this paper was the characterization of carbon and low-alloy steel after different heat treatments. Two steels were investigated, medium carbon C45 steel and low-alloy chrome-vanadium 51CrV4 steel. Two steels were also compared based on their chemical composition. Heat treatment of both steels included: normalizing at 880°C for 1 hour and cooled in air after which the samples were separated and investigated, second assortment of samples were again heated at 850°C for 1 hour and then quenched in water. Investigation was conducted after every step in heat treatment process. After every step, hardness was measured, tensile strength was calculated from hardness values, and thermal properties were also investigated. Metallographic studies were performed on every sample and analyzed. Results show increase in hardness and tensile strength values in quenched samples in comparison to the normalized samples. Also, thermal properties had lower values after quenching which is in accordance with the literature data. Metallographic investigation shows the typical ferritepearlite microstructure after normalizing and martensitic microstructure after quenching.