Activities in MnO{sub 2}-Al{sub 2}O{sub 3} slags and deoxidation equilibria of Mn and Si
- Tohoku Univ., Sendai (Japan). Inst. for Advanced Materials Processing
In the production of high-quality steels, the knowledge of the equilibrium between inclusions and steel is indispensable for the precise control of the composition of inclusions. In particular, the activities in the MnO-SiO{sub 2}-Al{sub 2}O{sub 3} system are of essential importance in Mn-Si killed steels.The activities of MnO and SiO{sub 2} along the liquidus line in the MnO-SiO{sub 2}-Al{sub 2}O{sub 3}-Fe{sub 1}O (1.2 to 6.7 mass pct) system were determined at 1,823 and 1,873 K by using a slag-metal equilibration technique. On the basis of the re-evaluated MnO iso-activity curves, the SiO{sub 2} and Al{sub 2}O{sub 3} iso-activity curves were determined by using the ternary Gibbs-Duhem relation. The control of inclusions composition in Si-Mn killed steels is discussed based on the equilibria between inclusion and steel with respect to Si, Mn, Al, and O.
- OSTI ID:
- 260792
- Journal Information:
- Metallurgical Transactions, B, Vol. 27, Issue 2; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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