THERMODYNAMICS OF OXYGEN SOLUTIONS IN ALUMINUM-CONTAINING Ni – Cr MELTS
https://doi.org/10.17073/0368-0797-2018-6-490-493
Abstract
Thermodynamic analysis of the effect of aluminum on the solubility of oxygen in Ni – Cr melts has been carried out. Aluminum at very low levels practically does not affect the concentration of oxygen in the melt, which is determined by the chromium content. When the aluminum content is above ~0.01 % for all alloys, it already determines the solubility of oxygen in the melt. The minimum values of the oxygen concentration are achieved with an aluminum content of ~0.2 %. With the increase of chromium content in the melt, the minimum oxygen concentration increases. For Ni – 10 % Cr, Ni – 20 % Cr and Ni – 30 % Cr alloys, it is 2·10–3, 7·10–3 and 10–2, respectively.
Supporting agencies: RFBR, research project no. 16-03-00641 A.
About the Authors
V. Ya. Dashevskii
Baikov Institute of Metallurgy and Materials Science, RAS; National University of Science and Technology “MISIS” (MISIS).
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “EnergyEfficient and Resource-Saving Industrial Technologies”, Head of the Laboratory.
Moscow.
A. A. Alexandrov
Baikov Institute of Metallurgy and Materials Science, RAS.
Russian Federation
Russian Federation
Cand. Sci.(Eng.), Senior Researcher.
Moscow.
References
1. Dashevskii V.Ya., Grigorovich K.V., Krasovskii P.V., Makarova N.N., Kashin V.I. Thermodynamics of oxygen solution in Ni-Cr melts. Doklady Akademii Nauk. 1998, vol. 359, no. 2, pp. 212–213. (In Russ.).
2. Dashevskii V.Ya., Kanevskii A.G., Makarova N.N., Grigorovitch K.V., Kashin V.I. Deoxidation Equilibrium of Chromium in Liquid Iron-Nickel Alloys. ISIJ International. 2005, vol. 45, no. 12, pp. 1783–1788.
3. Lyakishev N.P., Gasik M.I. Metallurgiya khroma [Metallurgy of chrome]. Moscow: ELIZ, 1999, 582 p. (In Russ.).
4. Kulikov I.S. Raskislenie metallov [Deoxidation of metals]. Moscow: Metallurgiya, 1975, 504 p. (In Russ.).
5. Aleksandrov A.A., Dashevskii V.Ya., Leont’ev L.I. Thermodynamics of oxygen solutions in the nickel melts containing aluminum and titanium. Izvestiya VUZov. Chernaya metallurgiya = Izvestiya. Ferrous Metallurgy. 2016, vol. 59, no. 7, pp. 485–490. (In Russ.).
6. Sigworth G.K., Elliott J.F., Vaughn G., Geiger G.H. The thermodynamics of dilute liquid nickel alloys. Metallurgical Soc. CIM. 1977, vol. 16, no. 1, pp. 104–110.
7. Ishii F., Ban-ya S. Equilibrium between aluminum and oxygen in liquid nickel and nickel-iron alloy. Tetsu to Hagane. 1995, vol. 81, no. 1, pp. 22–27.
8. Belyanchikov L.N. A universal method of converting the values of the interaction parameters of elements from one base of the alloy to another on basis of the theory of quasi-regular solutions. Part II. Evaluation of interaction parameters of elements in Nickel alloys. Elektrometallurgiya. 2009, no. 2, pp. 29–39. (In Russ.).
9. Janke D., Fischer W.A. Das Lösungsverhalten des Sauerstoffs in Nickelbasisschmelzen. Arch. Eisenhüttenw. 1975, B. 46, H. 5, S. 297–302. ( In Germ.)
10. Khimushin F.F. Zharoprochnye splavy [Heat-resistant alloys]. Moscow: Metallurgiya, 1969, 752 p. (In Russ.).
11. Grigoryan V.A., Belyanchikov L.N., Stomakhin A.Ya. Teoreticheskie osnovy elektrostaleplavil’nykh protsessov [Theoretical basis of EAF processes]. Moscow: Metallurgiya, 1987, 272 p. (In Russ.).
12. Lyakishev N.P., Gasik M.I. Fizikokhimiya i tekhnologiya elektroferrosplavov [Physicochemistry and technology of electric ferroalloys]. Moscow: Eliz, 2005, 448 p. (In Russ.).
Review
For citations:
Dashevskii V.Ya., Alexandrov A.A. THERMODYNAMICS OF OXYGEN SOLUTIONS IN ALUMINUM-CONTAINING Ni – Cr MELTS. Izvestiya. Ferrous Metallurgy. 2018;61(6):490-493. (In Russ.) https://doi.org/10.17073/0368-0797-2018-6-490-493
Views:
602
Email this article 