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Analysis of the complex deoxidation of carbon steel melts

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Abstract

The joint complex deoxidation of carbon steel melts is analyzed. A procedure is proposed to calculate the equilibrium oxygen concentration in a melt. Rail steel is used as an example to study the joint complex deoxidation of a melt by aluminum and silicon. Mullite (2Al2O3 · 3SiO2) and kyanite (Al2O3 · SiO2) are considered as the reaction products. Thermodynamic calculations demonstrate that the deoxidizing capacity of aluminum is increased in the presence of silicon in a melt. In this case, a substantial increase in the deoxidizing capacity in the concentration range 0.001–0.1 wt % Al is achieved when kyanite (Al2O3 · SiO2) forms in the reaction products. The results of laboratory and industrial experiments on complex deoxidation are shown to agree well with the calculated data. These results demonstrate that the proposed calculation procedure can be recommended to determine the equilibrium oxygen concentration in a melt in the presence of several deoxidizing elements.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia

    K. V. Grigorovich & A. K. Garber

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  1. K. V. Grigorovich
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  2. A. K. Garber
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Correspondence to K. V. Grigorovich.

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Original Russian Text © K.V. Grigorovich, A.K. Garber, 2011, published in Metally, 2011, No. 5, pp. 171–180.

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Grigorovich, K.V., Garber, A.K. Analysis of the complex deoxidation of carbon steel melts. Russ. Metall. 2011, 934–941 (2011). https://doi.org/10.1134/S0036029511090151

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  • DOI: https://doi.org/10.1134/S0036029511090151

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