Studies of the Properties and Microstructure of Heat Treated 0.27% C and 0.84% Mn Steel

M. I. Mohamed


In the present work, different heat treatments like hardening with different cooling rates followed by tempering at different temperatures have been performed. The material used in this study is carbon steel of 0.27% C and 0.84% Mn. Samples of as-rolled steel were subjected to different heat treatment processes. The steel was heated to the austenitizing temperature of 870°C for 2hrs followed by water quenching, oil quenching, air and furnace cooling. Water and oil quenched samples were subjected to tempering for one hour at temperatures of 250°C, 350°C, 450°C and 550°C. Tensile and impact tests were carried out for as rolled and heat-treated steel. Results show that the heat treated steel revealed an excellent combination of tensile strength and impact strength, which is suitable for structural applications. Optical metallographic investigation was carried out for all samples compared with the as rolled steel. The heat treatment revealed remarkable changes in steel morphology and mechanical properties.


medium carbon steel; heat treatment; mechanical properties; optical micrograph; tempering

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D. O. Oluyemi, O. I. Oluwole, B. O. Adewuyib, “Studies of the Properties of Heat Treated Rolled Medium Carbon Steel”, Materials Research, Vol. 14, No. 2, pp. 135-141, 2011

O. O. Daramola, B. O. Adewuyi, I. O. Oladele, “Effects of Heat Treatment on the Mechanical Properties of Rolled Medium Carbon Steel”, Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No. 8, pp.693-708, 2010

B. S. Motagi, R. Bhosle, “Effect of Heat Treatment on Microstructure and Mechanical Properties of Medium Carbon Steel”, International Journal of Engineering Research and Development, Vol. 2, No. 1, pp. 7-13, 2012

N. M. Ismail, N. A. A. Khatif, M. A. Kamil, A. Kecik, M. A. H. Shaharudi, “The effect of heat treatment on the hardness and impact properties of medium carbon steel”, IOP Conf. Series: Materials Science and Engineering, Vol. 114, No. 1, pp. 012108-012106, IOP Publishing, 2016

D. A. Fadare, T. G. Fadara, O. Y. Akanbi, “Effect of Heat Treatment on Mechanical Properties and Microstructure of NST 37-2 Steel”, Journal of Minerals & Materials Characterization & Engineering, Vol. 10, No. 3, pp. 299-308, 2011

O. O. Joseph, O. O. Joseph, R. O. Leramo1, O. S. Ojudun, “Effect of Heat Treatment on Microstructure and Mechanical Properties of SAE 1025 Steel: Analysis by one-way ANOVA”, Journal of Materials and Environmental Science, Vol. 6, No. 1, pp. 101-106, 2015

J. K. Odusote, T. K. Ajiboye, A. B. Rabiu, “Evaluation of Mechanical Properties of Medium Carbon Steel Quenched in Water and Oil”, AU Journal of Technology, Vol. 15, No. 4, pp. 218-224, 2012

V. K. Murugan, P. K. Mathews, “Effect of Tempering Behavior on Heat Treated Medium Carbon (C 35 Mn 75) Steel”, International Journal of Innovative Research in Science, Engineering and Technology, Vol. 2, No. 4, pp. 945-9540, 2013

S. A Tukur, M. M Usman, I. Muhammad, N. A Sulaiman, “Effect of Tempering Temperature on Mechanical Properties of Medium Carbon Steel”, International Journal of Engineering Trends and Technology, Vol. 9 No. 15, pp. 798-800, 2014

A. K. Tanwer, “Effect of Various Heat Treatment Processes on Mechanical Properties of Mild Steel and Stainless Steel”, American International Journal of Research in Science, Technology, Engineering & Mathematics, Vol. 8, No. 1, pp. 57-61, 2014

A. Calik, “Effect of cooling rate on hardness and microstructure of AISI 1020, AISI 1040 and AISI 1060 Steels”, International Journal of Physical Sciences, Vol. 4, No. 9, pp. 514-518, 2009

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