On the Mechanisms of Alumina Cluster Formation in Molten Iron

Abstract

Aluminum deoxidation products of molten pure iron were investigated by scanning electron microscopy. The results obtained are summarized as follows.
(1) Well developed dendritic alumina inclusions were mainly observed on staitic iron bath, and arms of those dendritic alumina tended to be cut off from stems.
(2) Deoxidation products from stirred bath were mainly consist of spherical alumina particles.
(3) The neck growth of alumina inclusions on the observation was successfully explained by the introduction of the sintering theory of solid particles.