Aluminum Deoxidation Equilibrium of Molten Iron–Aluminum Alloy with Wide Aluminum Composition Range at 1 873 K

Al–O equilibria in molten Fe–Al alloys were experimentally investigated. Molten steel with varying Al content (0.01–10 mass%) was equilibrated with a pure Al2O3(s) crucible at 1873 K in an Ar atmosphere with 3 vol% H2. The oxygen content of steel with Al content higher than 1.0 mass% was found to be...

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Published inISIJ International Vol. 49; no. 10; pp. 1483 - 1489
Main Authors Kang, Youngjo, Thunman, Mikael, Sichen, Du, Morohoshi, Takashi, Mizukami, Kazumi, Morita, Kazuki
Format Journal Article
LanguageEnglish
Published The Iron and Steel Institute of Japan 01.01.2009
Subjects
aluminum
deoxidation
equilibrium constant
interaction parameters
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Summary:Al–O equilibria in molten Fe–Al alloys were experimentally investigated. Molten steel with varying Al content (0.01–10 mass%) was equilibrated with a pure Al2O3(s) crucible at 1873 K in an Ar atmosphere with 3 vol% H2. The oxygen content of steel with Al content higher than 1.0 mass% was found to be much lower than that found in previous works, while the oxygen content for Al content less than 1 mass% was found to be slightly higher, resulting in a smaller equilibrium constant. The interaction parameters as well as the equilibrium constant of the Al–O equilibria in molten steel at 1873 K were reevaluated in the present study. The equilibrium for the Al deoxidation of molten steel was well represented up to 10.0 mass% Al using the reevaluated parameters.
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ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.49.1483