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Relationship between activity interaction parameters in Fe-C system and temperature

  • Er-bao Chen
  • Mao-liu Liu
  • Shi-jun Wang
Article

Abstract

Carbon solubility in Fe-Mn melts (xFe = 0. 102 3 − 0. 789 9, xMn=0. 055 1 − 0. 638 0) was measured experimentally at various temperatures. Using Gibbs-Duhem equation, in combination with the experimental results in this work, quoting experimental data reported in references, and by strict thermodynamic derivation and calculation, the relation equations between the activity interaction parameters in Fe-C system and temperature were obtained. The calculation equation of lnγFe in Fe-C system was also obtained. The calculated results show that these relation equations can be used to calculate the activity coefficients of carbon and iron in Fe-C system and can satisfy the necessary condition to satisfy Gibbs-Duhem equation and the necessary condition to satisfy the stability condition of system at high carbon content. The calculation formula for lnγC in Fe-Mn-C system was also obtained.

Key words

Fe-C system activity interaction parameter activity coefficient carbon 

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Copyright information

© China Iron and Steel Research Institute Group 2009

Authors and Affiliations

  1. 1.School of Metallurgy and MaterialsAnhui University of TechnologyMa’anshan, AnhuiChina
  2. 2.First Factory of Steelmaking and RollingMa anshan Iron and Steel Co LtdMa’anshan, AnhuiChina

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