The liquid solution properties in the Fe-Ni and Fe-Ni-C systems have been thermodynamically assessed using the modified quasichemical model in the pair approximation. The asymmetry of the Fe-Ni and Fe-Ni-C alloy melts was verified by measuring the melting points of Fe-Ni binary alloys on the Ni-rich side, and the C solubility limit in Fe-Ni melt over the entire concentration range at 1500°C and 1600°C. The solubility minimum of C and the maximum partial enthalpy of mixing of C in the ternary Fe-Ni-C system occurred at near the maximum short-range ordering composition of the binary Fe-Ni liquid solution. The extrema of the partial properties of C in the ternary Fe-Ni-C system were successfully reproduced with only one constant adjustable ternary parameter.

中文翻译：

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使用修正的准化学模型对液态铁镍碳合金进行热力学评估

Fe-Ni 和 Fe-Ni-C 系统中的液体溶液性质已经使用修正的准化学模型在对近似中进行了热力学评估。Fe-Ni 和 Fe-Ni-C 合金熔体的不对称性通过测量富镍侧 Fe-Ni 二元合金的熔点和整个浓度范围内 Fe-Ni 熔体中 C 的溶解度极限来验证在 1500°C 和 1600°C。三元Fe-Ni-C体系中C的溶解度最小值和C的最大混合部分焓出现在Fe-Ni二元溶液的最大短程有序组成附近。三元Fe-Ni-C体系中C的部分性质的极值仅用一个恒定的可调三元参数就成功再现。