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THERMODYNAMIC MODELING OF LANTHANUM INTERACTION PROCESSES USING IRON-BASED METALLIC MELTS

https://doi.org/10.17073/0368-0797-2015-12-877-883

Abstract

Based on thermodynamic analysis of oxide binary and ternary systems having oxide La2 O3 as a component, the authors have formed the base of energy parameters of the theory of subregular solutions of oxide melts, coupled with an area of metal melts existence. Temperature dependences of the equilibrium constants for steel deoxidation heterogeneous reactions were established. The components solubility surfaces in oxygen-containing steel were constructed for Fe – Al – La – O – С, Fe – Ca – La – O – С, Fe – Mg – La – O – С, Fe – Si – La – O – С, Fe – Cr – La – O – С systems. Diagrams presenting complex deoxidation of steel by alloys and blends of modifi cators containing active and alloying elements: Ca, Mg, Si, Al, Cr, La are given. The analysis was made for well – deoxidized and desulfurized metal. At the typical deoxidation scheme, at witch the rare-earth metals are introduced after adding into metal of calcium, silicon and aluminum, the produced inclusions calcium are aluminate and magnesium conglomerates. They are the substrates for small fractions and actively interact with liquid components of inclusions and dissolve in it. Thus, La2O3 as an independent phase in metal inclusions was not found.

About the Authors

G. G. Mikhailov
South Ural State University
Russian Federation

Dr. Sci. (Eng.), Professor, Head of the Chair of Physical Chemistry,

76, V.I. Lenina ave., Chelyabinsk, 454080



L. A. Makrovets
South Ural State University
Russian Federation

Engineer of the Chair of the Physical Chemistry,

76, V.I. Lenina ave., Chelyabinsk, 454080



L. A. Smirnov
Insitute of Metallurgy, UB RAS
Russian Federation

Academician of Russian Academy of Sciences (RAS), Dr. Sci. (Eng.), Chief Researcher,

101, Amundsena str., Ekaterinburg, 620016



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Review

For citations:


Mikhailov G.G., Makrovets L.A., Smirnov L.A. THERMODYNAMIC MODELING OF LANTHANUM INTERACTION PROCESSES USING IRON-BASED METALLIC MELTS. Izvestiya. Ferrous Metallurgy. 2015;58(12):877-883. (In Russ.) https://doi.org/10.17073/0368-0797-2015-12-877-883

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