Abstract
This chapter presents the findings of the reoxidation of liquid steel during protective atmosphere electroslag remelting of the steel with a low oxygen content. The formation and transformation of oxide inclusions are closely related to the soluble oxygen content of liquid steel. The effect of liquid steel reoxidation during ESR on the oxide inclusion chemistry is also presented. To reveal the inclusion evolution during ESR process, the inclusions in the samples taken from the steel electrode, liquid metal pool during ESR process, and remelted ingot are characterized. Further, thermodynamic modelling is established to study the interactions of gas-slag-metal-inclusion phases. The experimental determination and thermodynamic considerations are employed to elucidate the evolution mechanism of non-metallic inclusions in steel during the ESR process.
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