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Elektrostal’, Russia

Alpatov A.V.,RAS Institute of Metallurgy | Paderin S.N.,OAO Elektrostal Metallurgical Works
Russian Metallurgy (Metally) | Year: 2015

The energy parameters of the model of a pseudoregular ionic solution are estimated for binary oxide phase diagrams in seven systems containing titanium oxide. The obtained parameters are compared to the available theoretical and experimental data on the thermodynamic properties of TiO2 in liquid binary systems. The model of a pseudoregular ionic solution is extended to the liquid eight-component FeO-MnO-CaO-MgO-SiO2-CrO1.5-AlO1.5-TiO2 system, as applied to metallurgical slags containing titanium oxides. © 2015, Pleiades Publishing, Ltd.


Shil'nikov E.V.,OAO Elektrostal Metallurgical Works | Alpatov A.V.,RAS Institute of Metallurgy | Paderin S.N.,OAO Elektrostal Metallurgical Works
Russian Metallurgy (Metally) | Year: 2013

The oxygen activity is studied by oxygen sensors during the oxidation period in experimental heat of a superalloy in a 5-t electric arc furnace. The results of chemical analysis of metal and slag samples are used to calculate the activities of the metallic and oxide solution components using the energy parameters of the models of a pseudosubregular solution for the melt and a pseudoregular ionic solution for the slag, which were determined and presented in our earlier works. Equations are derived for the activity of oxygen in equilibrium with all melt components simultaneously and with each component individually. The entire oxidation process and the oxidation reaction of each metallic solution component are analyzed by comparing the actual and equilibrium oxygen activities in the metal at the beginning, middle, and end of the oxidation period of heat. The driving forces of the oxidation process are calculated from the difference between the actual and equilibrium chemical potentials of oxygen. © 2013 Pleiades Publishing, Ltd.


Muruev S.V.,OAO Elektrostal Metallurgical Works | Shil'nikov E.V.,OAO Elektrostal Metallurgical Works | Paderin S.N.,OAO Elektrostal Metallurgical Works
Russian Metallurgy (Metally) | Year: 2015

The stabilization of introduction of oxygen into a furnace during the oxidation period in all heats of 08Kh18N10T steel by automatic maintaining the gas pressure in an oxygen line at a level of 14 atm and the use of an oxygen meter make it possible to determine the actual oxygen flow rate; to calculate this flow rate for each experimental heat; to estimate the degree of oxygen assimilation for oxidation reactions as a function of the carbon concentration in a metal at the end of the oxidation period of heat; and to calculate oxygen distribution for the oxidation of C, Si, Mn, and Cr in a metallic solution. The results of measuring emf with oxygen sensors at the beginning, middle, and end of the oxidation period for experimental heats are used to calculate the actual oxygen activities in the metal. In all experimental heats, the oxygen activity increases with decreasing carbon concentration. © 2015, Pleiades Publishing, Ltd.

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