Abstract
The effect of tempering temperature on mechanical properties of the quenched low alloy steel was studied. The as-received low alloy steel samples were heated to 950 °C, held for 30 min, and then oil-quenched. The as-quenched samples were finally tempered in the temperature range of 200–600 °C for 30 min. The chemical composition of as-received alloy steel was determined using spectrometer. The microstructures of the samples were observed using optical microscope. A Rockwell hardness test was done to measure the hardness of the alloy steel samples, and a Charpy impact test were conducted to measure the impact toughness of the samples. The results showed the microstructures of the as-quenched and as-tempered samples consist of martensite with different orientation and small inclusions of irregular shapes. Compared with the as-received low alloy steel, the hardness of the quenched steel increased while the impact energy decreased. In comparison with the quenched samples, increasing tempering temperature in the range of 200–600 °C would improve the impact energy of the tempered steels, and it significantly increased above 400 °C.
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Acknowledgements
The authors would like to acknowledge the University of Syiah Kuala for providing the research fund. We are also grateful to PT Nusa Halmahera Minerals for providing low alloy steel grinding media.
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Usman, H. et al. (2024). Mechanical Properties of Quenched and Tempered Low Alloy Steel Grinding Media. In: Irwansyah, Iqbal, M., Huzni, S., Akhyar (eds) Proceedings of the 4th International Conference on Experimental and Computational Mechanics in Engineering. ICECME 2022. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-7495-5_4
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DOI: https://doi.org/10.1007/978-981-99-7495-5_4
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