ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Influence of Unstable Non-equilibrium Liquid Iron Oxide on Clustering of Alumina Particles in Steel
Toshiaki MizoguchiYoshiyuki UeshimaMasaaki SugiyamaKazumi Mizukami
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2013 Volume 53 Issue 4 Pages 639-647

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Abstract

Alumina clusters extracted from molten steel and from a cast slab at our plant were analyzed by SEM and TEM. It was found that a small amount of liquid FeO could accelerate the clustering of alumina inclusions in aluminum-killed steel because of the strong liquid-capillary negative pressure of liquid FeO. The sources of the FeO are most likely oxygen contamination from ferroalloy additives, residual steel adhering to the refractory surfaces of ladles and vessels, and air entrainment.

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© 2013 by The Iron and Steel Institute of Japan
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