Modeling of Slag Modification on Inclusions in 54SiCr6 Spring Steel

A kinetic model of slag-steel-inclusion reactions in 54SiCr6 spring steelSpring steel was established to predict the effect of slag composition on inclusions using FactSage Macro Processing. The dissolved aluminum, total oxygen, and inclusionInclusion composition with varying slags were calculated using the current model. The predicted results are in accordance with the lab-scale experimental ones. Furthermore, the effect of refining slag on the transformation of inclusions was predicted. For 54SiCr6 spring steelSpring steel during slag modificationSlag modification process, the composition of CaO–SiO2–Al2O3–5%CaF2 slag was optimized to suppress the Al pick-up from top slag and promote the formation of low-melting-point inclusionsInclusion in molten steel.