A. Romanov et al., OXYGEN ACTIVITY AND SOLUBILITY BEHAVIOR ON COOLING AND SOLIDIFICATIONOF FE-C-SI-O MELTS, Russian metallurgy. Metally, (2), 1995, pp. 5-10
The equilibrium states in Fe-C-Si-O system melts (0.15% C) were subjec
ted to computer-aided analysis. Given the competing carbon and silicon
oxidation reactions, conditions are established at some temperature p
oints of the cooling curve and in the solidification interval for a te
rnary equilibrium in a supercooled melt. At temperatures below these p
oints inversion of the chemical interaction occurs (one reaction super
sedes another). in any case, as soon as solidification begins the oxid
ation of the reagents is strongly accelerated owing to the differentia
tion of the composition in the crystals - liquid - oldde phase system.
The features established in this study exert a strong effect on the f
inal equilibrium state and composition of reaction products. Solidific
ation maintains its role of the leading process.