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采用热力学分析分别对Si-Mn系TRIP钢在平衡与非平衡条件下的T0温度进行了评估,从而获得了贝氏体转变上限温度的计算方法;同时采用Thermo-Calc热力学计算软件并结合TQ6接口模块以及自建数据库,通过Compaq Visual Fortran 6软件编程计算了多元体系实验钢的贝氏体转变下限温度。结果表明:热力学计算方法获得的平衡及偏平衡条件下T0温度的平均值,与实测值较接近;通过对临界退火后奥氏体的MS进行计算并用于预测贝氏体转变下限温度,其计算结果与实验结果吻合较好。
Thermodynamic analysis was carried out to evaluate the T0 temperature of Si-Mn TRIP steels under both equilibrium and non-equilibrium conditions. The calculation method of the upper limit temperature of bainite transformation was obtained. At the same time, Thermo-Calc thermodynamic calculation software and TQ6 interface Module and self-built database, the bainite transformation temperature of multivariate experiment steel was calculated by Compaq Visual Fortran 6 software program. The results show that the average value of T0 under equilibrium and partial equilibrium obtained by thermodynamic calculation method is close to the measured value. By calculating MS of austenite after critical annealing and predicting the lower limit temperature of bainite transformation, The results agree well with the experimental results.