Modeling of Precipitate Oxide and Sulfide Inclusions Formation in Liquid Steel

The behaviour of non-metallic inclusions MnO, MnS, FeS, Al2O3, SiO2, Y2O3,Y2S3 in liquid steel were modelled in commercial software FactSage. It allowed for calculating and designing diagrams of dependence of inclusions formation from the concentration of yttrium in determined limits of aluminium and oxygen. As a result, the influence of the increasing yttrium concentration on the precipitations of oxide and sulfide inclusions is observed. The behavior of precipitation the another analyzed oxides and sulfides is also observed in liquid steel, giving a full composition in non-metallic inclusions, formatted in specified conditions. The amounts of mass fractions of Y2O3 and Y2S3 are increasing at the growing Y in liquid steel, which shows the active formation of these inclusions.