Influence of Mould Heat Storage Capacity on Properties of Grey Iron
Affiliation(s)
Department of Materials Science and Engineering, Obafemi Awolowo University,Ile-Ife, Nigeria. Centre for Energy Research and Development (CERD), Obafemi Awolowo University,Ile-Ife, Nigeria.
Department of Materials Science and Engineering, Obafemi Awolowo University,Ile-Ife, Nigeria. Centre for Energy Research and Development (CERD), Obafemi Awolowo University,Ile-Ife, Nigeria.
ABSTRACT
Grey cast iron is characterized by presence of a large portion of its carbon in the form of graphite flakes which are observable in their microstructures. Their properties are significantly dependent on the micro-constituents of the, cast iron components. A way of controlling the microstructure of cast iron is through the controlled cooling rates during solidification. To control cooling rate, the heat storage capacity of the mould is important. This paper presents the characteristic effects of graphite flake sizes on some mechanical properties of grey cast iron. Six mould materials with heat storage capacities ranging from 1.52 kJ.m-2.K-1.s-1/2 to 2.16 kJ.m-2.K-1.s-1/2 were prepared and used to cast some grey cast iron samples whose microstructures were observed by optical microscopy. Mechanical properties of the grey iron were evaluated. The results show that the properties increased with the heat storage capacity of the mould. Also, the microstructures show a dependence on heat storage capacity of the mould.
Grey cast iron is characterized by presence of a large portion of its carbon in the form of graphite flakes which are observable in their microstructures. Their properties are significantly dependent on the micro-constituents of the, cast iron components. A way of controlling the microstructure of cast iron is through the controlled cooling rates during solidification. To control cooling rate, the heat storage capacity of the mould is important. This paper presents the characteristic effects of graphite flake sizes on some mechanical properties of grey cast iron. Six mould materials with heat storage capacities ranging from 1.52 kJ.m-2.K-1.s-1/2 to 2.16 kJ.m-2.K-1.s-1/2 were prepared and used to cast some grey cast iron samples whose microstructures were observed by optical microscopy. Mechanical properties of the grey iron were evaluated. The results show that the properties increased with the heat storage capacity of the mould. Also, the microstructures show a dependence on heat storage capacity of the mould.
Cite this paper
A. Adedayo and B. Aremo, "Influence of Mould Heat Storage Capacity on Properties of Grey Iron," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 4, 2011, pp. 387-396. doi: 10.4236/jmmce.2011.104028.
A. Adedayo and B. Aremo, "Influence of Mould Heat Storage Capacity on Properties of Grey Iron," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 4, 2011, pp. 387-396. doi: 10.4236/jmmce.2011.104028.
References
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[1] Adedayo A.V. 2010 Effects of addition of iron filings to green moulding sand on the microstructure of grey cast iron. Journal of the Brazilian Society for Mechanical Sciences and Engineering, Vol. XXXII, No 2, pp 171-175 [2] Rajput R.K. 2006 Engineering materials and metallurgy, 1st ed. S. Chand & Co. New Delhi., pp 13, 28-31, 101 [3] DeGarmo E.P., Black J.T., Kosher R.A.2003 Material and processes in manufacturing 9th ed. John Wiley and Sons, New York, pp 60-100, 375 - 408, 1100-1123 [4] Heine R.W., Loper C.R., Rosenthal P.C. 2003 Principles of metal castings, 26th reprint, TMH ed. New York, pp 86. [5] Moffatt, W.G.; Pearsall, G.W.; Wulff, J. 1964 The structure and properties of materials, structure, vol.1, John Wiley and Sons, Brisbane, pp 134, 195 [6] Rajan T.V., Sharma C.P., Sharma A. 1988 Heat treatment principles and techniques, Prentice-Hall of India, Private Ltd, New Delhi, pp11-14, 289, 331. [7] Adedayo A.V., Ibitoye, S.A., Oyetoyan, O.A. 2010 Annealing heat treatment effects on steel welds. Journal of Mineral, Materials Characterization and Engineering, Vol. 9, No. 6 pp 601-611. [8] Imaev R.M., Imaev V.M., Khismatullin T.G. 2006Refinning of the microstructure of cast intermetallic alloy Ti-43% Al-X (Nb, Mo, B) with the help of heat treatment, Metallovedenie I Termicheskaya Obrabotka Metallov, No.2, pp 38-41 [9] Adedayo A.V. 2009a Effects of carbon content on steel welds. Journal of Research in Technology and Engineering Management, Vol. 2, No. 1 pp131-135 [10] Adedayo, A.V 2009b Effects of Iron Filings on the Properties of Green Moulding Sand, Proceedings of 2nd National Conference of Institute of Technology, Kwara State Polytechnic, Ilorin, Vol 2, No 1, pp45-49 [11] Higgins, R.A. 2004 Engineering metallurgy: Applied physical metallurgy. 6th ed. Viva books, New Delhi, pp 355, 356 [12] Flemings M.C. 1974 Solidification processing; Materials science and engineering series. McGraw-Hill New York. pp 184 [13] Brophy, J.H., Rose, R.M.; Wulff J., 1964 The structure and properties of materials, thermodynamics, vol.2, John Wiley and Sons, Brisbane, pp 113-114, 188-189 [14] DeGarmo E.P., Black J.T., Kosher R.A. 1999 Material and processes in manufacturing 8th ed. John Wiley and Sons, New York, pp 90-93,345-415, 1114 [15] Callister W.J. 1985 Materials science and engineering, an introduction. John Wiley & Sons, NY, pp 717 -731