Effect of Velocity of Impact on Mechanical Properties and Microstructure of Medium Carbon Steel during Quenching Operations


Theoretical analysis of the effects of velocity of impact using suitable heat transfer equations expressed in forms of finite difference method was developed and used to determine their effects on the characteristic cooling parameters during quenching process. Various velocities of impact obtained by varying the heights of specimen drops were also used to experimentally determine their effects on characteristic cooling parameters and mechanical properties of medium carbon steel using water as the quenching medium. At height of drop of 0.5 m, 1.0 m, 1.5 m, and 2.0 m, the tensile strength of the material is 410.4, 496.12, 530.56, and 560.40 N/mm2 respectively. The corresponding hardness values are 42.4, 45.2, 46.2, 50.5 HRC respectively. It is found that as the velocity of impact increases, maximum cooling rate increases. Hardness and ultimate tensile strength also increase. There are good agreements between theoretical and experimentally determined values of critical cooling parameters of water during quenching operations.

Share and Cite:

Agboola, J. , Kamardeen, O. , Mudiare, E. and Adeyemi, M. (2015) Effect of Velocity of Impact on Mechanical Properties and Microstructure of Medium Carbon Steel during Quenching Operations. Engineering, 7, 434-445. doi: 10.4236/eng.2015.77039.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Agboola, J.B. (2014) Performance Assessment of Selected Nigerian Vegetable Oils as Quenching Media during Heat Treatment of Medium Carbon Steel. PhD Thesis, Federal University of Technology, Minna.
[2] Adeyemi, M.B. and Adedayo, S.M. (2009) Vegetable Oils as Quenchants for Hardening Medium Carbon Steel. Journal of Applied Science and Technology, 14, 74-78.
[3] Hassan S.B., Agboola, J.B., Aigbodion, V.S. and Williams, E.J. (2010) Hardening Characteristics of Plain Carbon Steel and Ductile Cast Iron Using Neem Oil as Quenchant. Journal of Minerals and Materials Characterization and Engineering, 5, 31-36.
[4] Totten, G.E., Bates, C.E. and Clinton, N.A. (1993) Handbook of Quenchants and Quenching Technology. ASM International, 62, 140-144.
[5] Fernandes, P. and Prabhu, K.N. (2007) Effect of Section Size and Agitation on Heat Transfer during Quenching of AISI 1040 Steel. Journal of Materials processing Technology, 183, 1-5.
[6] Fadare, D.A., Fadara, T.G. and Akanbi, O.Y. (2011). Effect of Heat Treatment on Mechanical Properties and Microstructure of NST37-2 Steel. Journal of Minerals and Materials Characterization and Engineering, 10, 299-308.
[7] Mohammed, M. (2010) The Effect of Agitation and Quenchant Temperature on the Heat Transfer Coefficients for 6061 Aluminum Alloy Quenched in Distilled Water. Journal of ASTM International, 7, 189-194.
[8] Alberg, H. (2003) Material Modelling for Simulation of Heat Treatment. Unpublished Master of Science Thesis, Lulea University of Technology, Lulea.
[9] Bohumil, T., Steven, D. and Spanielka, J.S. (2012) Effect of Agitation Work on Heat Transfer during Cooling in Oil Isorapid 277HM. Journal of Mechanical Engineering, 58, 102-106.
[10] Fontecchio, M., Maniruzzaman, M. and Sisson Jr., R.D. (2002) The Effect of Bath Temperature and Agitation Rate on the Quench Severity of 6061 Aluminum in Distilled Water. Proceedings of the 21st Heat Treating Society Conference, Ndianapolis, 2002, 131-142.

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.