Effect of Slag Composition on the Concentration of Al2O3 in the Inclusions in Si-Mn-killed Steel
- Authors
- Park, Jun Seok; Park, Joo Hyun
- Issue Date
- Jun-2014
- Publisher
- ASM International
- Keywords
- SULFIDE CAPACITY; RAMAN-SPECTRA; DISSOLUTION MECHANISM; ALUMINUM DEOXIDATION; FERRITIC STAINLESS-STEEL; CAO-SIO2-MNO SLAG; BEHAVIOR; 1 873 K; DEOXIDATION EQUILIBRIUM; INTERFACIAL REACTION
- Citation
- Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, v.45, no.3, pp.953 - 960
- Indexed
- SCIE
SCOPUS
- Journal Title
- Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
- Volume
- 45
- Number
- 3
- Start Page
- 953
- End Page
- 960
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/22827
- DOI
- 10.1007/s11663-013-9998-2
- ISSN
- 1073-5615
- Abstract
- The thermodynamic equilibria between CaO-Al2O3-SiO2-CaF2-MgO(-MnO) slag and Fe-1.5 mass pct Mn-0.5 mass pct Si-0.5 mass pct Cr melt was investigated at 1873 K (1600 A degrees C) in order to understand the effect of slag composition on the concentration of Al2O3 in the inclusions in Si-Mn-killed steels. The composition of the inclusions were mainly equal to (mol pct MnO)/(mol pct SiO2) = 0.8(+/- 0.06) with Al2O3 content that was increased from about 10 to 40 mol pct by increasing the basicity of slag (CaO/SiO2 ratio) from about 0.7 to 2.1. The concentration ratio of the inclusion components, , and the activity ratio of the steel components, , showed a good linear relationship on a logarithmic scale, indicating that the activity coefficient ratio of the inclusion components, , was not significantly changed. From the slag-steel-inclusion multiphase equilibria, the concentration of Al2O3 in the inclusions was expressed as a linear function of the activity ratio of the slag components, on a logarithmic scale. Consequently, a compositional window of the slag for obtaining inclusions with a low liquidus temperature in the Si-Mn-killed steel treated in an alumina ladle is recommended. (C) The Minerals, Metals & Materials Society and ASM International 2013
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