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University of Belgrade – Technical Faculty in Bor , Bor , Serbia
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University of Belgrade – Technical Faculty in Bor , Bor , Serbia
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University of Belgrade – Technical Faculty in Bor , Bor , Serbia
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University of Belgrade – Technical Faculty in Bor , Bor , Serbia
University of Belgrade – Technical Faculty in Bor , Bor , Serbia
University of Belgrade – Technical Faculty in Bor , Bor , Serbia
This paper investigates the effects of oil quenching and tempering at various temperatures on the mechanical and structural properties of X155CrVMo12-1 tool steel. The steel specimens were austenitized at 1030 °C for half an hour, followed by quenching and tempering at different temperatures. Mechanical properties were assessed by measuring the hardness of the samples after each heat treatment. Using the conversion formula, the tensile strength values were calculated based on the measured hardness. Structural changes were analyzed using optical microscopy. The results indicate that the highest hardness values were achieved after the quenching process. However, an increase in tempering temperature led to a decrease in hardness. Optical microscopy revealed that quenching caused the appearance of martensite in the microstructure, while tempering at various temperatures caused alterations in the martensite structure.
The research presented in this paper was done with the financial support of the Ministry of Science, Technological Development and Innovation of the Republic of Serbia, with the funding of the scientific research work at the University of Belgrade, Technical Faculty in Bor, according to the contract with registration number 451-03-137/2025-03/200131.
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