JMMCE  Vol.8 No.2 , February 2009
A Study of Processing Parameters on the Carburization of C2R Steels
ABSTRACT
This study reports an investigation of the effect of carburizing variables – temperature, time and percentage of energizer –on the case properties of C2R steel obtained from HMT Ltd. India. A carburizer consisting of hardwood charcoal and coke respectively in the ratio of 2:1 was used for the research with sodium carbonate as the energizer. The carburizing box was filled with 20 mm thick carburizer compound prior to fixing the steel samples in place. The specimens were carburized using different percentages of energizers (10, 20 and 30%) at different temperatures (820, 860, 900 and 940℃) for different times (from one to five hours). All the specimens were quenched from carburizing temperature, ground to polished surfaces and then etched for ten minutes in 25% Nital. The case depth was measured using the calibrated ocular of an inverted metallurgical microscope fixed at 100 x magnification. The hardness values of the C2R steel cases were measured with a micro hardness tester that uses diamond pyramid indenter. The results of the study showed that the average hardness of the C2R steel cases increased with temperature for any given carburizing time and temperature. For a given percentage energizer and temperature, the case depths and hardness increased with time. Increase in the percentage energizer however decreased the activation energy required for diffusion to occur exponentially.

Cite this paper
P. Atanda, O. Olorunniwo, L. Umoru and A. Adeyeye, "A Study of Processing Parameters on the Carburization of C2R Steels," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 2, 2009, pp. 79-92. doi: 10.4236/jmmce.2009.82008.
References
[1]   America Society of Metals(1964); Metals Hand book, Heat-treating, cleaning and finishing. 8th ed.

[2]   M.A. Majid ad H.C. Child; Effect of carburizing on unidirectional bending fatigue strength of low alloy steel. (1983). Journal of Metals Technology, Vol. 10 page 173.

[3]   Lakhtin,Yu.M(1977); Engineering Physical Metallurgy and Heat Treatment. Mir Publishers,Moscow.

[4]   Smith, W.F(1970); Principles of Materials Science and Engineering. 2nd ed. Mc GrawHill Int. ed

[5]   Simon, E.N(1974); Dictionary of Metal Heat Treatment. Frederic Muller Ltd, London.

[6]   Prabhudev K.H (1997) Handbook of Heat treatment of Steels. 4th ed. Tata Mc GrawHill Publishing Company Ltd. New Delhi.

[7]   Rajput R.K(2002) Materials Science and Engineering. 2nd ed. S.K.Katara & Sons, New Delhi.

[8]   Degarmo E. Paul, Black J.T & Kohser A. Ronald(1997) Materials and Processes in Manufacturing. 8th ed. Prentice-Hall of India Private Ltd., New Delhi.

[9]   George S.Brady and Henry R. Clauser(1989) Materials Handbook.12th ed. Mc Graw-Hill Publishing Company, New York.

[10]   Higgins R.A (1983) Engineering Metallurgy Part 1.

 
 
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