Metallurgical and Materials Transactions B

, Volume 31, Issue 6, pp 1483–1490

Analysis of secondary oxide-scale failure at entry into the roll gap

  • M. Krzyzanowski
  • J. H. Beynon
  • C. M. Sellars
Article

Abstract

Both numerical analysis based on finite-element (FE) modeling and experimental evidence concerning the secondary oxide-scale failure at entry into the roll gap are presented and reviewed for a better understanding of events at the roll-workpiece interface, in turn, leading to better definition of the boundary conditions for process models. Attention is paid to the two limit modes leading to oxide-scale failure, which were observed earlier during tensile testing under rolling conditions. These are considered in relation to the temperature, the oxide-scale thickness, and other hot-rolling parameters. The mathematical model used for the analysis is composed of macro and micro parts, which allow for simulation of metal/scale flow, heat transfer, cracking of the oxide scale, as well as sliding along the oxide/metal interface and spallation of the scale from the metal surface. The different modes of oxide-scale failure were predicted, taking into account stress-directed diffusion, fracture and adhesion of the oxide scale, strain, strain rate, and temperature. Stalled hot-rolling tests under controlled conditions have been used to verify the types of oxide-scale failure and have shown good predictive capabilities of the model. The stock temperature and the oxide-scale thickness are important parameters, which, depending on other rolling conditions, may cause either through-thickness cracking of the scale at the entry or lead to entry of a nonfractured scale when the scale/metal interface is not strong enough to transmit the metal deformation.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    D.A. Korzekwa, P.R. Dawson, and W.R.D. Wilson: Int. J. Mech. Sci., 1992, vol. 34, pp. 521–39.CrossRefGoogle Scholar
  2. 2.
    G.-J. Lin, N. Kikuchi, and S. Takahashi: ASME J. Tribol., 1993, vol. 115, pp. 105–13.Google Scholar
  3. 3.
    J.D. Fletcher, J. Talamantes-Silva, and J.H. Beynon: Modelling of Metal Rolling Processes: Symposium 8. Control of External Product Properties, London, Mar. 10, 1998, The Institute of Materials, London, 1998, pp. 50–59.Google Scholar
  4. 4.
    M. Schütze: Oxid. Met., 1995, vol. 44 (1–2), pp. 29–61.CrossRefGoogle Scholar
  5. 5.
    G.I. Kolchenko and N.P. Kuznetsova: Izy. VUZ Chernaja Metall., 1984, No. 11, pp. 113–25.Google Scholar
  6. 6.
    Y.H. Li and C.M. Sellars: 1996 Proc. 2nd Int. Conf. on Modelling of Metal Rolling Processes, J.H. Beynon, P. Ingham, H. Teichert, and K. Waterson, eds., The Institute of Materials, London, pp. 192–206.Google Scholar
  7. 7.
    M. Krzyzanowski and J.H. Beynon: Steel Res., 1999, vol. 70 (1/99), pp. 22–27.Google Scholar
  8. 8.
    M. Krzyzanowski and J.H. Beynon: Mater. Sci. Technol., 1999, vol. 15, pp. 1191–98.Google Scholar
  9. 9.
    J.H. Beynon and M. Krzyzanowski: Int. Conf. Modelling of Metal Rolling Processes 3, London, Dec. 13–15, 1999, pp. 360–69.Google Scholar
  10. 10.
    M. Bauccio: Metals Reference Book, 2nd ed., ASM INTERNATIONAL, Materials Park OH, 1993, pp. 306–13.Google Scholar
  11. 11.
    C. Devadas and I. Samarasekera: Ironmaking and Steelmaking, 1986, vol. 13, pp. 311–21.Google Scholar
  12. 12.
    J.D. Fletcher and J.H. Beynon: Proc. 2nd Int. Conf. Modelling of Metal Rolling Processes, J.H. Beynon, P. Ingham, H. Teichert, and K. Waterson, eds., The Institute of Materials, London, 1996, pp. 202–12.Google Scholar
  13. 13.
    M. Pietrzyk and J.G. Lenard: Thermal-Mechanical Modelling of the Flat Rolling Process, Heidelberg: Springer-Verlag, Berlin, 1991, pp. 181–87.Google Scholar
  14. 14.
    S. Shida: Hitachi Research Laboratory Report, Tokyo, 1974, pp. 1–9.Google Scholar
  15. 15.
    H. Riedel: Met. Sci., 1982, vol. 16, pp. 569–74.CrossRefGoogle Scholar
  16. 16.
    J.S. Sheasby, W.E. Boggs, and E.T. Turkdogan: Met. Sci., 1984, vol. 18, pp. 127–36.CrossRefGoogle Scholar
  17. 17.
    R.C. Ormerod IV, H.A. Becker, E.W. Grandmaison, A. Pollard, P. Rubini, and A. Sobiesiak: Proc. Int. Symp on Steel Reheat Furnance Technology, F. Mucciardi ed., Hamilton, ON, Canada, CIM, Montreal, 1990, pp. 227–42.Google Scholar
  18. 18.
    W.C. Chen, I.V. Samarasekera, A. Kumar, and E.B. Hawbolt: Ironmaking and Steelmaking, 1993, vol. 20 (2), pp. 113–25.Google Scholar
  19. 19.
    Y.H. Li and C.M. Sellars: Proc. 2nd Int. Conf. on Hydraulic Descaling in Rolling Mills, London, Oct. 13–14, 1997, The Institute of Materials, London, 1997, pp. 1–4.Google Scholar
  20. 20.
    M. Krzyzanowski and J.H. Beynon: Report No. 0.15, Institute for Microstructural nd Mechanical Process Engineering, The University of Sheffield, Sheffield, United Kingdom, Sept. 1999.Google Scholar
  21. 21.
    R. Raj and M.F. Ashby: Metall. Trans., 1971, vol. 2, pp. 1113–27.Google Scholar
  22. 22.
    J. Robertson and M.I. Manning: Mater. Sci. Technol., 1990, vol. 6, pp. 81–91.Google Scholar
  23. 23.
    K. Kendall: Nature, 1978, vol. 272, p. 710.CrossRefGoogle Scholar
  24. 24.
    H. Ranta, J. Larkiola, A.S. Korhonen, and A. Nikula: Proc. 1st Int. Conf. on “Modelling of Metal Rolling Processes,” London. Sept. 1993, The Institute of Materials, London, 1993, pp. 638–49.Google Scholar
  25. 25.
    R. Morrel: Handbook of Properties of Technical and Engineering Ceramics, HMSO, London, 1987, pp. 92–208.Google Scholar
  26. 26.
    F.B. Swinkels and M.F. Ashby: Acta Metall., 1981, vol. 29, pp. 259–81.CrossRefGoogle Scholar
  27. 27.
    P. Hancock and J.R. Nicholls: Mater. Sci. Technol., 1988, vol. 4, pp. 398–406.Google Scholar

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2000

Authors and Affiliations

  • M. Krzyzanowski
    • 1
  • J. H. Beynon
    • 1
  • C. M. Sellars
    • 1
  1. 1.the Institute for Microstructural and Mechanical Process Engineering: IMMPETUSThe University of SheffieldSheffieldUnited Kingdom

Personalised recommendations