Skip to main content
SpringerLink
Log in

The effect of segregation on the formation of austempered ductile iron

  • Published:
Journal of Heat Treating

Abstract

Alloy segregation at the solidification cell boundaries can have a very important influence upon the kinetics of the bainite reaction. The two stages usually observed in a homogeneous matrix after isothermal holding in the range of temperatures 350 to 450 °C can be described as follows: 1 -γ→ (α) + (γ); 2-(α) + (γ) → α + silicocarbides. These reactions are functions of the elements in solution in the matrix. For this reason, segregated elements affect very sensitively the evolution of the two basic reactions. The solidification cell boundaries are often not completely transformed to bainite, which explains the presence of martensite observed in these areas. The influence of the size of the solidification cells has also been studied. The austenitization conditions are also very important. At the opposite extreme, the bainitic reaction of the matrix located along the graphite interface evolves more quickly than that observed in the matrix or at the cell boundaries.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. C. Bak, J.M. Schissler, J.L. Benard, and M. Degois:Revue de Fonderie, May 1981.

  2. B.P.J. Sandvik:Metall. Trans. A, 1982, vol. 13A, p. 777.

    Google Scholar 

  3. H.K.D.H. Bhadeshia:Acta Metall., vol. 28, p. 1103.

  4. K. Röhrig:Giesserei Praxis, 1983, no. 1/2, p. 1.

  5. E. Dorazil, B. Barta, E. Munsterova, L. Stransky, and A. Huvar:AFS International Cast Metals Journal, 1982, p. 52.

  6. Institut de Recherche de la Sid’erurgie, Atlas des Courbes de transformation.

  7. J.M. Schissler: Ph.D. Thesis, Nancy, France, 1972.

  8. J. M. Oblack and R. F. Hehemann: Transactions and Hardenability in Steels Symposium, 1967, “15”.

  9. C. Bak: Diplôme d’Etudes Sup’erieures, Nancy, France, 1975.

  10. J. Arnould: Diplôme d’Etudes Sup’erieures, Nancy, France, 1974.

  11. J.M. Schissler, J. Arnould, and G. M’etauer:Revue de M’etallurgie, November 1975, pp. 779–93.

  12. E. C. Bain and H. W. Paxton: “Les ’el’ements d’addition dans l’acier”, Dunod, Paris, France, 1968.

  13. J. M. Schissler, J. Saverna, C. Bak, and R. Bellocci: Volume “Energy Conservation in Industry-Applications and Techniques”, Energy R. and D. Programme of the Commission of the European Communities, 1982, pp. 62, 79.

Download references

Author information

Authors and Affiliations

  1. Ecole des Mines Parc de Saurupt, Laboratoire de M’etallurgie associ’e au CNRS U.A. 159, 54042, Nancy Cedex, France

    J. M. Schissler & J. Saverna

Authors
  1. J. M. Schissler
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. Saverna
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Schissler, J.M., Saverna, J. The effect of segregation on the formation of austempered ductile iron. J. Heat Treating 4, 167–176 (1985). https://doi.org/10.1007/BF02833136

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02833136

Keywords

Search

Navigation