X100管线钢的修正超组元模型计算

Calculation of super component model modified for X100 pipeline steel

考虑了合金元素间的交互作用,对超组元热力学模型进行修正,并利用该修正后的模型计算得到X100管线钢中合金元素和形变储能对铁素体相变参数的影响规律。结果表明：模型计算的奥氏体转变为铁素体的温度A3高于Thermo-calc软件计算结果;形变储能增加提高了铁素体相变驱动力与形核驱动力,但随温度变化不显著;随着合金元素含量的增加,Mo比Ni、Cr更能显著降低铁素体和珠光体相变驱动力。

It was reported that super component thermodynamic model could be modified by considering the influence of the interactions among the alloying elements.The influence of alloying elements and deformation energy on the ferrite transformation parameters in X100 pipeline steel was calculated based on this modified model.The results show that the transformation temperature of austenite to ferrite（A3）calculated by this model is higher than it calculated by Thermo-calc software;the deformation energy storage increases the ferrite phase change driving force and nucleate driving force,but it is not significant with temperature change;with the increase of alloying element content,Mo can significantly reduce the phase change driving force of ferrite and pearlite more than Ni and Cr.