Study of hardening and wear resistance of the AISI 1045 steel quenched with automotive and machining coolant
Published 2019-02-07
Keywords
- AISI 1045 steel,
- quenching media,
- wear resistance
How to Cite
Abstract
In order to improve the mechanical properties of the steels, the quenching heat treatment is used; in this way, the hardness, the tensile strength and consequently, the wear resistance are increased. This work focuses on studying the wear resistance of AISI 1045 steel quenched in water, in coolant for vehicle engine and in coolant for machining. The samples were made in 76.2 mm diameter and 8 mm thick discs. The quenchings were carried out in an electric furnace at an austenitizing temperature of 870° C and a holding time of 50 minutes. The cooling media used was water, Quallitor automotive coolant and three coolant mixtures for machining, in this case, Solubeg, (10% coolant - 90% water, 30% coolant - 70% water and 50% coolant - 50% water ). The results indicated that in all quenched steels the coefficient of friction was lower compared with the material in commercial state. It was also evident that the wear rate was high in the harder steels. Finally, it was evidenced that machining oil mixed with water allows obtaining intermediate hardness, intermediate coefficient of friction and low mass loss.
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