Interaction Coefficients of Mo, B, Ni, Ti and Nb with Sn in Molten Fe–18mass%Cr Alloy

Koga Hori, Kengo Kato, Hideki Ono*

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

3 被引用数 (Scopus)

抄録

Increasing the utilization of steel scrap is strongly required for reducing CO2 emission in iron- and steelmaking processes. In steel scrap recycling, the content of tramp elements in steel (such as copper and tin) inevitably increases. Accordingly, it is important to understand the thermodynamic characteristics of relevance to the accumulation of tramp elements in molten steel. The values of the interaction coefficients of Mo, B, Ni, Ti, and Nb with Sn in molten iron were reported previously. However, little is known about the interaction coefficients of alloying elements with tramp elements in molten high-chromium steel. In this work, the interaction coefficients of Mo, B, Ni, Ti, and Nb with Sn in the molten Fe–18mass%Cr alloy were measured at 1 873 K by a chemical equilibration technique that uses the liquid immiscibility of the Fe–18mass%Cr alloy and Ag, yielding the following results: Mo εSn(in Fe−18Cr) = −2.9(±3.2), eSn(inMoFe−18Cr) = −0.0054(±0.0099) B εSn(in Fe−18Cr) = 9.6(±1.9), eSn(inBFe−18Cr) = 0.19(±0.02) Ni εSn(in Fe−18Cr) = −8.9(±2.6), eSn(inNiFe−18Cr) = −0.036(±0.011) Ti εSn(in Fe−18Cr) = 10.4(±5.7), eSn(inTiFe−18Cr) = 0.051(±0.028) Nb εSn(in Fe−18Cr) = 20.5(±8.0), eSn(inNbFe−18Cr) = 0.055(±0.022) The results show that the values of the interaction coefficients of M with Sn in the Fe-18mass%Cr alloy are smaller than those for molten iron, which were measured in the previous work, except for titanium. The interaction coefficients of M with Sn in Fe and Fe–18mass%Cr alloy were estimated based on a regular solution model. The estimated interaction coefficients of B, Ni, and Ti with Sn in molten iron and Ni and Ti with Sn in the molten Fe–18mass%Cr alloy reasonably agree with the measured values.

本文言語英語
ページ(範囲)405-412
ページ数8
ジャーナルISIJ International
62
3
DOI
出版ステータス出版済み - 2022

ASJC Scopus 主題領域

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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