测定了１４００℃时Ｆｅ－Ｍｎ－Ｃ－Ｐ系高锰熔体中碳的溶解度为：Ｎ＿Ｃ＝０．１９６１＋０．１１８３Ｎ＿（Ｍｎ）－０．８５２５Ｎｐ；计算得到Ｍｎ与Ｃ，Ｐ与Ｃ的活度相互作用系数为：ε＿Ｃ￣（Ｍｎ）＝－１．６７，ρ＿Ｃ￣（Ｍｎ）＝０．２９，ε＿Ｃ￣Ｐ＝１１．００，ρ＿Ｃ￣Ｐ＝１０．８２；估算了高锰熔体中Ｍｎ，Ｐ和溶剂铁的活度系数。
The solubility of carbon in Fe-Mn-C-P melts containing high manganese Was determined at 1400℃.The solubility data can be expressed as: N_C＝0.1961＋0．1183N_(Mn)- 0.8525 Np The interaction coefficients between Mn and C,P and C in this melt were obtained as follows: ε_C ~（Mn）＝－1．67，ρ_C ~(Mn)＝0．29，ε_C ~P＝11．00，ρ_C ~P＝10．82 The activity coefficients of Mn,P and Solvent Fe in melts containing high Mn were estimated.
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