Mn-Si-Al 複合脱酸における溶鋼と脱酸生成物との平衡関係

概要

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The equilibrium relations between the liquid iron alloys of Fe-Mn-Si-Al-O system and the deoxidation products were studied. Assuming that the products formed during the complex deoxdation with Mn-Si-Al alloys consisted of MnO, SiO_2, and Al_2O_3, the activities of the constituents in the MnO-SiO_2-Al_2O_3 system were determined thermochemically. Using these results, the equilibrium relations between MnO-SiO_2-Al_2O_3 oxides and liquid iron were estimated at the condition of %Mn+%Si=1. At the same time, the measurements on the equilibrium between the liquid iron alloys and the oxide inclusions were carried out at the melting temperature of the iron alloys, approximately 1535℃. The deoxidation products were trapped directly underneath the solid-liquid interface of metal without any contamination by the container material. The experimental results agreed fairly well with the thermochemical calculation.
1977-08-01