Wetting Behavior of CaO–SiO2- and CaO–Al2O3-Based Mold Slags on High-Ti Steel

The relevant experiments and studies were conducted to address the metallurgical defects such as subcutaneous bubbles and slag inclusions occurring during the enamel steel continuous casting process. According to the high-temperature experimental results, calculations were made to determine the changes in viscosity and tension due to the steel reaction with the slag. Based on the experimental findings, there was a notable variation in the content of SiO2 and Al2O3 in the slag before and after the reaction. The concentration of the element Al in the steel melt significantly decreased, whereas the concentration of Ti showed a minimal change. These observations indicate that the reduction of SiO2 at the slag–steel interface is predominantly attributed to the role of Al. The calculation results showed that at 300 s of reaction time, the viscosity rapidly increased from 0.108 to 0.133 Pa·s and then slowly increased to 0.155 Pa·s; The interfacial tension rapidly decreased from its initial value of 1,380 mJ·m−2 to a minimum of 1,320 mJ·m−2, and it then slowly increased to an equilibrium state. Therefore, the main cause of the occurrence of porosity defects in the enamel steel continuous casting process is the reduction of interfacial tension between slag, steel, and gas caused by the reaction between the slag and steel, as well as the foaming of the slag.

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Wetting Behavior of CaO–SiO2- and CaO–Al2O3-Based Mold Slags on High-Ti Steel

Cited by 2 publications

References 37 publications

Machine Learning Combining High-Temperature Experiments for the Prediction of Wetting Angle of Mold Fluxes

Machine Learning Combining High-Temperature Experiments for the Prediction of Wetting Angle of Mold Fluxes

Analysis of metallurgical defects in enamel steel castings

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