Abstract:Due to lack of research on the activity interaction parameters between Mn and Al in high Mn and Al content molten steel and lack of reasonable thermal test methods, a new experimental method that could be used to study the thermodynamic properties of high Mn and Al content molten steel was obtained. The resistance furnace was used, and CaO-Al2O3 slag was covered on the surface of Fe-Mn-Al melt to prevent the oxidation of Al and the volatilization of Mn, and ensure the accuracy of thermodynamic data. The mass ratio of metal to slag was 2.4. The sample placed in an Al2O3 crucible and covered with a graphite crucible was equilibrated for 2 h under the conditions of 1 600 ℃ and Ar-H2 gas mixture with a flow ratio of 9 to 1. The preliminary experimental results show that with the increase of Mn content, the Al content decreases. From the WIPF, the first and second-order activity interaction parameters, eMnAl and rMnAl, are determined to be 0.028 8 and -0.000 25, respectively.
张杰. Fe-Mn-Al-O熔体中Mn、Al间活度相互作用系数的测定[J]. 中国冶金, 2022, 32(7): 51-56.
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