Mechanism of free sulfur influence on the eutectic cell count and transition from graphite to cementite eutectic in cast iron Part I. Theoretical background

• Autorzy: Fraś, E. , Górny, M.
• Języki publikacji: EN

Abstrakty

EN

In this work an analytical solution of general validity is used to explain the mechanism of free sulfur influence on the cell count and on the transition from graphite to cementite eutectic in cast iron. It is found that this transition can be related to the nucleation potential of graphite (represented by eutectic cell count N_v), the growth rate coefficient of graphite eutectic cell, μ the temperature range, ΔT_sc and the pre-eutectic austenite volume fraction, f_γ.

Słowa kluczowe

PL

teoria krystalizacji; proces krzepnięcia; żeliwo; skłonność do zabieleń

EN

theory of crystallization; solidification process; cast iron; chilling tendency

• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 1 spec.
• Strony: 53--56
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Fraś, E.

• AGH University of Science and Technology, Reymonta 23, 30-059 Cracow, Poland,

autor

Górny, M.

• AGH University of Science and Technology, Reymonta 23, 30-059 Cracow, Poland

Bibliografia

• [1] A.G.Fuller, Effect of superheating on chill and mottle formation, B.C.I.R.A Journal of Research and Development, vol. 9, (1961) 693-708.
• [2] J.W.Boyes, A.G. Fuller, Chill formation in cast iron, B.C.I.R.A Journal of Research and Development, vol. 12, (1964) 424-431.
• [3] N. Girshovitz, Solidification and properties of cast iron, Mashinostroyene, Moscow-Leningrad, 1966.
• [4] J.V. Dawson, S. Maitra, Recent research on the inoculation of cast iron, British Foundrymen, vol. 4, (1976) 117-127.
• [5] H. Fredriksson, I.L. Svensson, Computer simulation of the structure formed during solidification of cast iron. in The Physical Metallurgy of Cast Iron, H. Fredrickson and M. Hillert editors, North Holland, New York, (1985) 273-284.
• [6] L. Nastac, D.M. Stefanescu, Prediction of grey-to-white transition in cast iron by solidification modeling, AFS Transaction, vol. 103, (1995) 329-337.
• [7] J.W. Boyes, Influence of manganese and sulfur on chill and motlle formation, BCIRA Journal, vol.10, no.5, (1962) 568-579.
• [8] A.G. Fuller, Effect of manganese and sulfur on mechanical properties and structure of flake graphite cast iron, AFS Transactions, vol. 94, (1986) 863-872.
• [9] G.M. Goodrich, T.G. Oakwood, R.B. Gundlach, Manganese, Sulfur and Manganese-Sulfur Ratio Effects in Gray Cast Iron AFS Transactions, vol. 111, (2003) 783-812.
• [10] F. Henke, Mangan in Gusseisen, Giesserei–Praxis, nr.18, (1970) 281-294.
• [11] E. Fras, M. Górny, H. Lopez, The Transition from Gray to White Iron during Solidification, Metallurgical Transactions and Materials, vol.36A, (2005) 3075-3082.