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| Deoxidation thermodynamics in electroslag remelting process |
| LIN Jie, YANG Cheng, WANG Yuanming, MOU Fenyun, HOU Dong, WANG Deyong |
| (School of Iron and Steel, Soochow University, Suzhou 215000, Jiangsu, China) |
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Abstract In order to investigate the deoxidation during electroslag remelting process, a thermodynamics model for the deoxidation in Cr5 system with Al as a deoxidizer was developed based on the ion and molecule coexistence theory (IMCT), the thermodynamics equilibrium and the mass conservation law. The equilibrium mass percent of Si, Al, Mn in the steel were obtained depending on the increasing mass percent of Al， which provided a theoretical basis to control the Al addition based on the variation curves of mass percent of Si, Al, Mn in the steel and the composition required by the certain steel. The result shows that the mass percent of Si, Al, Mn and Al2O3 increase with the mass percent of Al increasing, while the mass percent of SiO2, FeO and MnO tend to decrease. Considering the limitation of Si, Al, Mn mass percent, the amount of Al added in the steel should not exceed 0.17% of the steel.
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