Effect of Al2O3 Refractories on Oxygen Content of Molten Fe–Cr Alloy

Thermodynamic information on the equilibrium between dissolved Cr and O in steel melt is the basic knowledge to control Cr content in the stainless steel. The case of using alumina refractories is considered in the present work. Molten Fe–Cr alloy equilibrated with Cr2O3–Al2O3 solid solution when Cr...

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Bibliographic Details
Published inISIJ International Vol. 52; no. 11; pp. 2007 - 2012
Main Authors Mizukami, Yuusuke, Miki, Takahiro, Hino, Mitsutaka
Format Journal Article
LanguageEnglish
Published Tokyo The Iron and Steel Institute of Japan 2012
Iron and Steel Institute of Japan
Subjects
aluminum
Applied sciences
chromium
equilibrium
Exact sciences and technology
iron
Metals. Metallurgy
oxygen
solid solution
Refractory
chromium
Chromium alloy
iron
aluminum
equilibrium
Solid solution
Alumina
oxygen
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Summary:Thermodynamic information on the equilibrium between dissolved Cr and O in steel melt is the basic knowledge to control Cr content in the stainless steel. The case of using alumina refractories is considered in the present work. Molten Fe–Cr alloy equilibrated with Cr2O3–Al2O3 solid solution when Cr content of the alloy was high and equilibrated with FetO·(Cr, Al)2O3 solid solution when Cr content of the alloy was low. The equilibrium oxygen contents in Fe–Cr alloy at given Cr contents using Al2O3 crucible in the present work were lower than those using Cr2O3 crucible reported previously. It was found that oxide in equilibrium with Fe–Cr alloy will control and affect the O content when Al content is low.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.52.2007