Steel in Translation

, Volume 48, Issue 3, pp 154–162 | Cite as

Thermodynamics of Oxygen Solution in Fe–Ni Melts Containing Boron

  • A. A. AleksandrovEmail author
  • V. Ya. Dashevskii
  • L. I. Leont’ev


Fe–Ni alloys are widely used in engineering today. They are sometimes alloyed with boron. Oxygen is a harmful impurity in Fe–Ni alloys. It may be present in dissolved form or as nonmetallic inclusions. The presence of oxygen in Fe–Ni alloys impairs their performance. Research on the thermodynamics of oxygen solutions in Fe–Ni melts containing boron is of considerable interest in order to improve alloy production. The present work offers a thermodynamic analysis of solutions of oxygen in Fe–Ni melts containing boron. The equilibrium constant of the reaction between boron and oxygen dissolved in the melt in such systems is determined. The activity coefficients at infinite dilution and the interaction parameters in melts of different composition are also calculated. When boron reacts with oxygen in Fe–Ni melts, the oxide phase contains not only B2O3 but also FeO and NiO. The mole fractions of B2O3, FeO, and NiO in the oxide phase are calculated for different boron concentrations in Fe–Ni melts at 1873 K. For iron melts with low boron content, the mole fraction of boron oxide is ~0.1. With increase in the nickel and boron content in the melts, the boron-oxide content in the oxide phase increases. Its mole fraction is close to one for pure nickel. The solubility of oxygen in Fe–Ni melts is calculated as a function of the nickel and boron content. The deoxidizing ability of the boron improve significantly with increase in nickel content in the melt. The curves of oxygen solubility in Fe‒Ni melts containing boron pass through a minimum, which is shifted to higher boron content with increase in nickel content in the melt. The boron content at the minima on the curves of oxygen solubility are determined, as well as the corresponding minimum oxygen concentrations.


iron–nickel melts oxygen boron thermodynamic analysis interaction parameters oxide phase mole fraction 


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  1. 1.
    Shlyamnev, A.P., Korrozionnostoikie, zharostoikie i vysokoprochnye stali i splavy. Spravochnik (Corrosion- Resistant, Heat-Resistant and High-Strength Steels and Alloys: Handbook), Moscow: Intermet-Inzhiniring, 2000.Google Scholar
  2. 2.
    Lyakishev, N.P., Pliner, Yu.L., and Lappo, S.I., Borsoderzhashchie stali i splavy (Boron-Containing Steels and Alloys), Moscow: Metallurgiya, 1986.Google Scholar
  3. 3.
    Bokshtein, S.Z., Vasilenok, L.B., Kablov, E.N., Radin, I.V., and Ryabova, G.G., Microalloying with boron and the structural stability of nickel alloys, Russ. Metall. (Engl. Transl.), 1986, no. 6, pp. 142–146.Google Scholar
  4. 4.
    Horton, J.A., McKamey, C.G., Miller, M.K., Cao, W.D., and Kennedy, R.L., Microstructural characterization of superalloy 718 with boron and phosphorus additions, Proc. Sixth Int. Symp. on Superalloys 718, 625, 706 and Various Derivatives, Loria, E.A., Ed., Warrendale, PA: Miner., Met. Mater. Soc., 1997, pp. 401–408.CrossRefGoogle Scholar
  5. 5.
    Steelmaking Data Sourcebook, New York: Gordon- Breach Science, 1988.Google Scholar
  6. 6.
    Slag Atlas, Düsseldorf: Verlag Stahleisen, 1995.Google Scholar
  7. 7.
    Turkdogan, E.T., Physical Chemistry of High Temperature Technology, New York: Academic, 1980.Google Scholar
  8. 8.
    Kulikov, I.S., Raskislenie metallov (Deoxidation of Metals), Moscow: Metallurgiya, 1975.Google Scholar
  9. 9.
    Belyanchikov, L.N., Universal method for recalculating interaction parameters of elements in changing the matrix of alloys using the quasi-regular solution theory. Part II. Estimating the interaction parameters of elements in nickel–based alloys, Elektrometallurgiya, 2009, no. 2, pp. 29–38.Google Scholar
  10. 10.
    Wagner, C., Thermodynamics of Alloys, Cambridge, Ma: Addison-Wesley, 1952.Google Scholar
  11. 11.
    Snitko, Yu.P., Surovoi, Yu.N., and Lyakishev, N.P., On connection of interaction parameters with the atomic characteristics of components, Dokl. Akad. Nauk SSSR, 1983, vol. 286, no. 5, pp. 1154–1156.Google Scholar
  12. 12.
    Kulikov, I.S., Termodinamika oksidov (Thermodynamics of Oxides), Moscow: Metallurgiya, 1986.Google Scholar
  13. 13.
    Sigworth, G.K., Elliott, J.F., Vaughn, G., and Geiger, G.H., The thermodynamics of dilute liquid nickel alloys, Can. Metall. Q, 1977, vol. 16, no. 1, pp. 104–110.CrossRefGoogle Scholar
  14. 14.
    Frohberg, M.G. and Wang, M., Thermodynamic properties of sulfur in liquid copper-antimony alloys at 1473 K, Z. Metallkd., 1990, vol. 81, no. 7, pp. 513–518.Google Scholar
  15. 15.
    Dashevskii, V.Ya., Fiziko-khimicheskie osnovy raskisleniya zhelezonikelevykh splavov (Physicochemical Basis of Deoxidation of Iron-Nickel Melts), Moscow: Fizmatlit, 2011.Google Scholar
  16. 16.
    Chiang, T. and Chang, Y.A., The activity coefficient of oxygen in binary liquid metal alloys, Metall. Trans. B, 1976, vol. 7, pp. 453–457.CrossRefGoogle Scholar
  17. 17.
    Aleksandrov, A.A. and Dashevskii, V.Ya., Effect of Zirconium on the Oxygen Solubility in Liquid Nickel and Ni–Fe Melts, Russ. Metall. (Engl. Transl.), 2016, vol. 2016, no. 9, pp. 832–838.CrossRefGoogle Scholar
  18. 18.
    Aleksandrov, A.A. and Dashevskii, V.Ya., Thermodynamics of the oxygen solutions in niobium-containing Fe–Ni melts, Russ. Metall. (Engl. Transl.), 2012, vol. 2012, no. 7, pp. 559–566.CrossRefGoogle Scholar
  19. 19.
    Hultgren, R., Desai, P.D., Hawkins, D.T., Gleiser, M., and Kelley, K.K., Selected Values of the Thermodynamic Properties of Binary Alloys, Metals Park: Am. Soc. Met., 1973.Google Scholar
  20. 20.
    Aleksandrov, A.A. and Dashevskii, V.Ya., Thermodynamics of the oxygen solutions in manganese-containing Fe–Co melts, Russ. Metall. (Engl. Transl.), 2014, vol. 2014, no. 1, pp. 1–7.CrossRefGoogle Scholar

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© Allerton Press, Inc. 2018

Authors and Affiliations

  • A. A. Aleksandrov
    • 1
    Email author
  • V. Ya. Dashevskii
    • 1
    • 3
  • L. I. Leont’ev
    • 1
    • 2
    • 3
  1. 1.Baikov Institute of Metallurgy and Materials ScienceRussian Academy of SciencesMoscowRussia
  2. 2.Presidium of the Russian Academy of SciencesMoscowRussia
  3. 3.Moscow Institute of Steel and AlloysMoscowRussia

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