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在Hillert-staffansson的亚点阵模型基础上，引用已知的热力学数据，导出了多元系中组元的化学势计算式并计算了NR94钢（1．12C－0．26Mu－0．58Cr－0．32Si）的ACl和ACm温度，计算结果与实测位吻合较好．
Based on the Hillert-staffansson sub-lattice model, the known thermodynamic data are used to derive the chemical potential formulas of the elements in the multivariate system and calculate the chemical potential of the NR94 steel (1.12C-0.26Mu-0.58Cr-0 .32Si) ACl and ACm temperature, the calculated results and the measured bit good agreement.