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采用超组元模型和LFG模型,计算了TRIP钢的碳在γ/α相界面处奥氏体侧的平衡浓度xγC/α、先共析铁素体相变驱动力ΔGγ→α+γ1和珠光体相变驱动力ΔGγ→α+cem以及相变平衡温度Ae3和Ae1,并分析了不同热变形和化学成分的影响。计算TRIP钢未变形条件下的相变平衡温度Ae3和Ae1与试验值吻合较好,显示了本文相变热力学计算的较高精度。
The superconductive elemental model and the LFG model were used to calculate the equilibrium concentration xγC / α of the austenite side of the TRIP steel at the γ / α phase interface. The pro-eutectoid ferrite transformation driving force ΔGγ → α + γ1 and pearl The driving force of bulk transformation ΔGγ → α + cem and the equilibrium temperature of transformation Ae3 and Ae1 were analyzed and the effects of different thermal deformation and chemical composition were analyzed. Calculating the phase transition temperature Ae3 and Ae1 under the undeformed condition of TRIP steel is in good agreement with the experimental data, which shows the higher accuracy of the phase transition thermodynamic calculation.