Hardening Characteristics of Plain Carbon Steel and Ductile Cast Iron Using Neem Oil as Quenchant

DOI: 10.4236/jmmce.2011.102011   PDF   HTML     7,152 Downloads   9,418 Views   Citations


The hardening characteristics of medium carbon steel and ductile cast iron using neem oil as quenching medium has been investigated. The samples were quenched to room temperature in Neem oil. To compare the effectiveness of the neem oil samples were also quenched in water and SAE engine oil the commercial quenchants. The microstructures and mechanical properties of the quenched samples were used to determine the quench severity of the neem oil. The result shows that hardness value of the medium carbon steel increased from 18.30HVN in the as-cast condition to 21.60, 20.30and 20.70HVN while that of ductile cast iron samples increased from 18.90HVN in the as-cast condition to 22.65, 20.30 and 21.30HVN for water, neem oil and SAE40 engine oil respectively. The as-received steel sample gave the highest impact strength value and water quenched sample gave the least impact strength. The impact strength of the medium carbon steel samples is 50.84, 41.35, 30.50 and 45.15 Joule and that of ductile iron is 2.71, 1.02, 0.68 and 1.70 Joule for as-cast condition, neem oil, water and SAE 40 engine oil quenched respectively. The microstructure of the samples quenched in the Neem oil revealed the formation of martensite. Hence, neem oil can be used where cooling severity less than that of water but greater than SAE 40 engine oil is required for hardening of plain carbon steels and ductile cast iron.

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S. Hassan, J. Agboola, V. Aigbodion and E. Williams, "Hardening Characteristics of Plain Carbon Steel and Ductile Cast Iron Using Neem Oil as Quenchant," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 2, 2011, pp. 161-172. doi: 10.4236/jmmce.2011.102011.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Morrogh, H. (1948): Anew Engineering Materials Production of Nodular Graphite Structures in grey cast irons. AASM pp. 72-90.
[2] Larry Olson (2001): Proper Quenching Option yields Heat Treating Results. pp 1-5.
[3] Rajan T. V. and C. P. Sharma (1988): Heat Treatment, Principles and Techniques. Prentice-Hall of New Delhi-India. pp. 143-150, 236-380.
[4] Gulyaev A. (1980): Physical Metallurgy. Vol 1, Mir Pubilshers Moscow. pp 154-198.
[5] Higgins R.A. (1995): Engineering Metallurgy. Edward Arnold UK, pp 218-257, 285-354.
[6] Hassan, S. B, Balogun, S.O and Aigbodion, V. S(2009): Hardening Characteristics of Medium Carbon Steel Using Fresh Cassava Liquid Extract as Quenchants Journal o Metallurgy and Materials Engineering, 4, No2, 55-61.
[7] Hassan, S. B(2003): Hardening Characteristics of Plain Carbon Steel Using Fatty- based oils as Quenchants, NSE, Technical Transactions, 38, 19-29.
[8] Srikanth.V(2003): Establishment of Katsina Neem Factory, National ResearchInstitute for chemical Technology, Zaria Nigeria. 1-4.
[9] Williams .E.J(2009):Evaluation of Neem oil as a Quenching medium for medium Carbon Steel and Ductile cast iron (Unpublished B-ENG project), Department of Metallurgical Engineering, Ahmadu Bello University, Zaria, Nigeria.
[10] American Society of Metals (ASM); Metal Hand book.: Material Park OH, 1995, pp. 822 –873
[11] Totten, G. E(1990): ‘Polymer Quenchants: The basics’. Advance Material Production, Vol 137, No.3, pp.51-53.
[12] Muhammed, T.I(2007): Evaluation of polymer glycerol for hardening process in steel and cast iron, MSc Seminar, Department of Metallurgical Engineering, Ahmadu Bello University, Zaria, P. 34

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