Abstract
The conditions of nonmetallic inclusions formation by using manganese, silicon, and aluminum deoxidizers in a steel bath (four steel grades) are reviewed in the presented paper. The changes in the chemical composition of nonmetallic inclusions were calculated under thermodynamic equilibrium conditions between liquid steel containing Mn, Si, O, Al and the formed liquid oxide phase, applying a non-commercial (author’s) computer program. The impact of the order of dispensing alloy additions, and the initial manganese content in steel on the final oxygen concentration, as well as the evolution of the chemical composition of nonmetallic inclusions were considered. The acquired results indicate that the proposed calculation procedure can be used to design the desired chemical composition of steel with a controlled value and chemical composition of nonmetallic inclusions.
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