Fe-Mn-Al-O熔体中Mn、Al间活度相互作用系数的测定

doi:10.13228/j.boyuan.issn1006-9356.20220277

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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, e^Mn_Al and r^Mn_Al, are determined to be 0.028 8 and -0.000 25, respectively.

Key words： Fe-Mn-Al-O system high manganese and aluminum content steel thermodynamics experimental method activity interaction parameter

Received: 23 March 2022

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ZHANG Jie. Determination of activity interaction parameters between Mn and Al in Fe-Mn-Al-O melts[J]. China Metallurgy, 2022, 32(7): 51-56.

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http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20220277 OR http://www.zgyj.ac.cn/EN/Y2022/V32/I7/51

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