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Journal of Phase Equilibria and Diffusion

, Volume 38, Issue 5, pp 743–749 | Cite as

Effect of Tin on the Phase Transformations of Cast Irons

  • Jacques LacazeEmail author
  • Jon Sertucha
Article
  • 165 Downloads

Abstract

Copper, manganese and essentially tin are used as alloying elements for obtaining cast irons with a fully pearlitic matrix in the as-cast state. Addition of tin, at a level of about 0.10-0.15 mass%, seems to be the only practical way for avoiding growth of ferrite in the stable eutectoid reaction and to fully transform the matrix of the material to pearlite in the metastable eutectoid system. While the role of copper and manganese has been previously rationalized, the way tin affects the eutectoid transformation in cast irons is still a matter of debate. The present work makes use of an assessment of the Fe-Sn system and of experimental data in the Fe-C-Sn system to evaluate the effect of tin on phase equilibria in this latter system. One ternary parameter is estimated and the resulting modification is applied to literature data on Fe-C-Si-Sn equilibria. Finally, solid-state phase transformation temperatures are calculated and used to discuss experimental information dealing with pearlitic cast irons. It is proposed that pearlite formation in Sn-bearing cast irons is associated to the transient formation of a Fe3SnC compound which has an ordered FCC structure.

Keywords

cast iron eutectoid transformation Fe-C-Sn system 

References

  1. 1.
    L. Guerin and M. Gagné, Effect of Mn, Cu and Sn on the Microstructure and Properties of Ductile Iron Castings, Foundryman, 1987, 80, p 334-336Google Scholar
  2. 2.
    J. Lacaze, J. Sertucha, P. Larrañaga, and R. Suárez, Combined Effects of Copper and Tin at Intermediate Level of Manganese on the Structure and Properties of as-Cast Spheroidal Graphite Cast Iron, Arch. Metall. Mater., 2017, 62, p 833-839CrossRefGoogle Scholar
  3. 3.
    J. Lacaze and J. Sertucha, Effect of Cu, Mn and Sn on Pearlite Growth Kinetics in as-Cast Ductile Irons, Int. J. Cast Metals Res., 2016, 29, p 74-78CrossRefGoogle Scholar
  4. 4.
    J. Sertucha, P. Larrañaga, J. Lacaze, and M. Insausti, Experimental Investigation on the Effect of Copper Upon Eutectoid Transformation of as-Cast and Austenitized Spheroidal Graphite Cast Iron, Int. J. Metalcasting Winter, 2010, 4, p 51-58CrossRefGoogle Scholar
  5. 5.
    J. Lacaze, The Austenite to Pearlite/Ferrite Transformation, ASM Handbook, Vol 1A, 2017, (to appear).Google Scholar
  6. 6.
    W.C. Johnson and B.V. Kovacs, The Effect of Additives on the Eutectoid Transformation of Ductile Iron, Metall. Trans. A, 1978, 9, p 219-229CrossRefGoogle Scholar
  7. 7.
    B.V. Kovacs, Pearlite Stabilization in Cast Irons, AFS Trans., 1980, 88, p 79-96Google Scholar
  8. 8.
    V.K. Grigorovich, Influence of Alloying Elements on Cementite Stability and the Graphitization of Cast Irons, Russ. Cast. Product., 1964, 12, p 557-561Google Scholar
  9. 9.
    E.N. Pan, M.S. Lou, and C.R. Loper, Effects of Cu, Sn, and Mn on the Eutectoid Transformation of Graphitic Cast Irons, AFS. Trans., 1987, 95, p 819-840Google Scholar
  10. 10.
    K.C. Hari Kumar, P. Wollants, and L. Delaey, Thermodynamic Evaluation of Fe-Sn Phase Diagram, CALPHAD, 1996, 20, p 139-149CrossRefGoogle Scholar
  11. 11.
    J. Miettinen, Reassessed Thermodynamic Solution Phase Data for Ternary Fe-Si-C System, CALPHAD, 1998, 22, p 231-256CrossRefGoogle Scholar
  12. 12.
    J. Lacaze and B. Sundman, An Assessment of the Fe-C-Si System, Metall. Trans. A, 1991, 22, p 2211-2223CrossRefGoogle Scholar
  13. 13.
    H. Nowotny, Strukturchemie Einiger Verbindungen Der Ubergangsmetalle Mit Den Elementen C, Si, Ge, Sn, Phys. Solid State Chem. 5, 1971, 27–70, (in German) (abstract in English).Google Scholar
  14. 14.
    H.H. Stadelmaier and L.J. Huetter, Ternary Carbides of the Transition Metals Nickel, Cobalt, Iron, Manganese with Zinc and Tin, Acta Metal., 1959, 7, p 415-419CrossRefGoogle Scholar
  15. 15.
    D. Connetable, J. Lacaze, P. Maugis, and B. Sundman, A Calphad Assessment of Al-C-Fe System with the κ Carbide Modelled as an Ordered Form of the fcc Phase, CALPHAD, 2008, 32, p 361-370CrossRefGoogle Scholar
  16. 16.
    Z. Wang, L. Wang, and T. Du, Study of the Thermodynamic Properties of Fe-C-Sn, Fe-C-Pb, Fe-C-Pb-Ce Liquid Solutions, J. Iron Steel Res. Suppl., 1987, 7, p 99–106, (in Chinese) (abstract in English).Google Scholar
  17. 17.
    N. Imai, T. Tanaka, T. Yuki, T. Iida, and Z.I. Morita, Equilibrium Distribution of Sn Between Solid and Liquid Phases in Fe-Sn and Fe-C-Sn alloys, ISIJ, 1991, 77, p 38–44, (in Japanese) (abstract in English).Google Scholar
  18. 18.
    T. Tanaka, Ph.D. thesis, Thermodynamics of the Equilibrium Distribution of Solute Elements Between Solid and Liquid Phases in Iron Alloys, Osaka University Knowledge Archive, 1984.Google Scholar
  19. 19.
    T. Kanno, T. Kikuchi, and I. Kang, Effect of Alloying Elements on the Eutectic Temperatures in Cast Iron, AFS Trans., 2005, paper 05-203.Google Scholar
  20. 20.
    J. Lacaze, C. Wilson, and C. Back, Experimental Study of the Eutectoid Transformation in Spheroidal Graphite Cast Iron, Scand. J. Metall., 1994, 23, p 151-163Google Scholar
  21. 21.
    V. Gerval and J. Lacaze, Critical Temperatures of Spheroidal Graphite Cast Irons: A Review of Literature Data, ISIJ Int., 2000, 40, p 386-392CrossRefGoogle Scholar
  22. 22.
    D. Duc, D. Treheux, P. Guiraldenq, B. Lambert, and P. Poyet, Influence du Carbone sur les Structures d’Equilibre du Diagramme Fer-Etain, Application à l’Etude de l’Influence de l’Etain sur la Transformation Perlitique dans les Fontes, Fonderie, 1973, 321, p 89-97Google Scholar
  23. 23.
    M.J. Lalich and C.R. Loper, Effects of Pearlite-Promoting Elements on the Kinetics of the Eutectoid Transformation in Ductile Cast Irons, AFS Trans., 1973, 81, p 217-228Google Scholar

Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.CIRIMATENSIACET, Université de ToulouseToulouse Cedex 4France
  2. 2.Ingeniería, I + D y Procesos de FundiciónIK4-AzterlanDurangoSpain

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