OXYGEN SOLUBILITY IN TITANIUM-CONTAINING Fe – Ni MELTS
https://doi.org/10.17073/0368-0797-2014-11-54-60
Abstract
The oxygen solubility in the titanium-containing iron-nickel melts has been experimentally studied at 1873 K using the Fe – 40 % Ni alloy as an example. The equilibrium constant of interaction of titanium and oxygen dissolved in the Fe – 40 % Ni melt ( = –15,17), the Gibbs energy of this reaction ( = 543 360 J/mol), and the interaction parameters characterizing these solutions ( = –1,420; = –0,472; = 0,116) were determined. The equilibrium constant of interaction of titanium and oxygen dissolved in the melt, the Gibbs energy of reaction of titanium and oxygen interaction, and the interaction parameters characterizing these solutions were calculated in a wide range of Fe – Ni alloys compositions at 1873 K. Oxygen solubility in the various compositions titanium-containing Fe – Ni melts was determined at 1873 K. When the nickel content rises to 40 %, the deoxidation ability of titanium decreases but then it sharply rises with increasing nickel content in melt. This can be explained by the fact that although the bond strength of titanium in nickel is considerably stronger in comparison with iron ( = 0,0083; = 0,000083), but the bond strength of oxygen in nickel is appreciably weaker that in iron ( = 0,0103; = 0,337). The oxygen solubility curves in Fe – Ni melts pass through a minimum whose position shifts to the lower titanium concentrations with an increase in the nickel content.
About the Authors
A. A. Aleksandrov
Institute of Metallurgy and Material Science named after Baikov A.A., RAS (49, Leninskii pr., Moscow, 119991, Russia)
Russian Federation
Cand.Sci.(Eng.),Senior Researcher
Russian Federation
Cand.Sci.(Eng.),Senior Researcher
V. Ya. Dashevskii
Institute of Metallurgy and Material Science named after Baikov A.A., RAS (49, Leninskii pr., Moscow, 119991, Russia)
Russian Federation
Dr.Sci.(Eng.),Professor, Head of the Laboratory
Russian Federation
Dr.Sci.(Eng.),Professor, Head of the Laboratory
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22.
Review
For citations:
Aleksandrov A.A., Dashevskii V.Ya. OXYGEN SOLUBILITY IN TITANIUM-CONTAINING Fe – Ni MELTS. Izvestiya. Ferrous Metallurgy. 2014;57(11):54-60. (In Russ.) https://doi.org/10.17073/0368-0797-2014-11-54-60
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