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Formation of hot-top segregation in steel ingot and effect of steel compositions

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Abstract

Convection and composition variations in the liquid zone during solidification of H2O-NH4C1 solution, which has the same model of convection as that of steel ingot, are studied. It is shown that a weak convection region forms near the ingot top in the liquid zone at a certain stage of solidification and then develops downward gradually, and the negative segregation is detected in the weak convection region. This interesting phenomenon reveals the formation process of hot-top segregation in steel ingots. The parameterdp L /df L , an important factor affecting the formation of hot-top segregation, is established as a function of the steel composition. When dpL/dfL is decreased by changing the steel composition, hot-top segregation will be impeded.

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References

  1. M.C. Flemings:Scand. J. Metall., 1976, vol. 5 (1), pp. 1–15.

    CAS  Google Scholar 

  2. Yuanzheng Wu:Iron and Steel, 1986, vol. 2 (9), pp. 62–64.

    Google Scholar 

  3. A. Olsson, R. West, and H. Fredriksson:Scand. J. Metall., 1986, vol. 15, pp. 104–12.

    CAS  Google Scholar 

  4. A. Hultgren:JISI, 1929, vol. 120, pp. 69–125.

    Google Scholar 

  5. T. Takahashi, K. Ichikawa, and M. Kudou:“Solidification and Casting of Metals,≓Met. Soc. Book 192, Sheffield, U.K., 1977, pp.331–33.

    Google Scholar 

  6. K.O. Jonsson:Jernkontorets Ann., 1969, vol. 153, p. 193.

    CAS  Google Scholar 

  7. H. Fredriksson and S.O.Nilsson:Metall.Trans. B, 1978, vol. 9B, pp. 111–20.

    CAS  Google Scholar 

  8. Shigeo Asai and Iwao Muchi:Trans. ISIJ, 1978, vol. 18, pp. 90–96.

    CAS  Google Scholar 

  9. Bo Shiyi:Two Phase Flow, National Defence Publishing House, Beijing, People's Republic of China, 1977, pp. 264–93.

    Google Scholar 

  10. T.S. Piwond and M.C. Flemings:Trans. TMS-AIME, 1966, vol. 236(8), pp. 1157–65.

    Google Scholar 

  11. N. Streat and F. Weinberg:Metall. Trans. B, 1976, vol. 7B, pp. 417–23

    Article  CAS  Google Scholar 

  12. K. Murakami, A. Shiraski, and T. Okamoto:Acta Metall., 1984, vol. 32 (9), pp. 1423–28.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, People's Republic of China

    JIE Wanqi (Lecturer) & Zhou Yaohe (Professor)

Authors
  1. JIE Wanqi
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  2. Zhou Yaohe
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Wanqi, J., Yaohe, Z. Formation of hot-top segregation in steel ingot and effect of steel compositions. Metall Trans B 20, 723–730 (1989). https://doi.org/10.1007/BF02655930

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  • DOI: https://doi.org/10.1007/BF02655930

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