THE CLASSIFICATION OF SILICOCALCIUM-BARIUM ALLOYS AND THEIR APPLICATION TO STEEL LADLE PROCESSING

Abstract

The paper presents the results of the investigation of of silicocalcium-barium alloys for the determination of primary, intermediate, eutectic and base phases in them, and their effect on steel during its out-of-furnace treatment. For the first time, a polygonal diagram of the state of the Si–Ca–Ba system has been constructed, which makes it possible to systematically classify silicocalcium-barium alloys. The mechanism of the formation of primary nonmetallic inclusions in the deoxidization of steel with barium alloys with the formation of silicate or oxide of Ca-Ba is presented and proposed a mechanism for their modification into globular eutectic composition such as Rankinite A comparative analysis of the efficiency of deoxidation of steel with alloys of silicon, calcium and barium has been performed.