THERMODYNAMICS OF OXYGEN SOLUTIONS IN THE NICKEL MELTS CONTAINING ALUMINUM AND TITANIUM
https://doi.org/10.17073/0368-0797-2016-7-485-490
Abstract
Thermodynamic analysis of oxygen solutions in liquid nickel containing aluminum and titanium was carried out. It is shown that the aluminum and titanium presence in the melt signifi cantly reduces the solubility of oxygen with their content increasing. However, after reaching contents of 0.205 % in the case of aluminum and 0.565 % in the case of titanium the oxygen concentration in the melt begins to increase with aluminum and titanium contents increasing. The minimum oxygen concentration during deoxidation of nickel melt by aluminum (1.44·10–4 % O) and titanium (2.98·10–4 % O) was determined. Obtained results allow to off er the best option of nickel alloys alloying by aluminum and titanium. Initially the deoxidation of melt is produced by aluminum in an amount providing the minimum oxygen concentration in the melt (~ 0,2 % Al). Then the formed oxide phase is removed to prevent the reoxidation of the melt. Only then alloying the melt is made by aluminum and titanium to desire their contents in the alloy.
About the Authors
A. A. Alexandrov
Baikov Institute of Metallurgy and Materials Science, RAS, Moscow, Russia
Russian Federation
Cand. Sci.(Eng.), Senior Researcher
Russian Federation
Cand. Sci.(Eng.), Senior Researcher
V. Ya. Dashevskii
Baikov Institute of Metallurgy and Materials Science, RAS, Moscow, Russia
National University of Science and Technology “MISIS” (MISIS), Moscow, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Energyefficient and Resource-saving Industrial Technologies”, Head of the Laboratory
L. I. Leont’ev
Baikov Institute of Metallurgy and Materials Science, RAS, Moscow, Russia
National University of Science and Technology “MISIS” (MISIS), Moscow, Russia
Scientifi c Council on Metallurgy and Metal Science of Russian Academy of Sciences (Department of Chemistry and Material Sciences), Moscow, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Academician, Adviser of the Russian Academy of Sciences, Chief Researcher
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Review
For citations:
Alexandrov A.A., Dashevskii V.Ya., Leont’ev L.I. THERMODYNAMICS OF OXYGEN SOLUTIONS IN THE NICKEL MELTS CONTAINING ALUMINUM AND TITANIUM. Izvestiya. Ferrous Metallurgy. 2016;59(7):485-490. (In Russ.) https://doi.org/10.17073/0368-0797-2016-7-485-490
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