Abstract
The influence of hardening on mechanical properties of the low alloy steel grinding balls was investigated. The as received low alloy steel samples were austenitized at 950 ℃ for three different austenitization times and then quenched in oil media. Spectrometer was used to determine the chemical composition of as received alloy steel and optical microscope was used to observe microstructural features. Hardness and Charpy impact tests were performed to measure mechanical properties of the alloy steel samples. The results showed hardness profiles of the as-received steel ball considerably varied from surface to the center. The steel ball exhibited poor hardenability with the thin hardened band at the surface. Compared with the Rockwell hardness of the as received steel samples, the hardness of the as quenched steel at 30 min austenitization time increased while the impact energy decreased. At the higher time, the hardness of as quenched sample decreased, whereas the impact energy remained unchanged. Samples austenitized at 950 ℃ for 30 min. would obtain a maximum hardening and can be used as a baseline for further tempering process.
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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., Fonna, S., Huzni, S., Ramadhan, T.I., Octaviantana, T. (2021). The Effect of Hardening on Mechanical Properties of Low Alloy Steel Grinding Media. In: Akhyar (eds) Proceedings of the 2nd International Conference on Experimental and Computational Mechanics in Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0736-3_43
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DOI: https://doi.org/10.1007/978-981-16-0736-3_43
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