奥氏体形变条件下铁素体成分的计算  

CALCULATION OF FERRITE COMPOSITION UNDER AUSTENITE DEFORMATION

作　　者：刘效东[1] 方鸿生[2] 刘南平[2] 

机构地区：[1]钢铁研究总院 [2]清华大学

出　　处：《钢铁》1991年第2期51-54,60,共5页Iron and Steel

摘　　要：本文在考虑奥氏体形变的情况下用规则溶液模型分别计算了Fe-Mn-C三元合金铁素体相在最大形核驱动力处的临界核心成分以及铁素体和奥氏体两相平衡时的成分。计算结果表明:在无奥氏体形变时,上述两种情况下的铁素体成分之间存在着一定的差别,而奥氏体的形变使得这种差别增大。最后在经典形核理论的前提下讨论了奥氏体形变对铁素体形核率的影响。In this paper, the critical nucleus composition of ferrite at maximum nucleation driving force and the composition of ferrite at phase equilibria between ferrite and austenite in Fe-Mn-C ternary alloys with or without austenite deformation are calculated by means of regular solution model respectively.The calculation results show that a certain difference exists in ferrite compositions under the two conditions above mentioned if there were no austenite deformation. The deformation of austenite promotes increase the ferrite composition difference. The effect of austenite deformation on nucleation rate of ferrite is discussed with classical nucleation theory as well.

关 键 词：奥氏体形变 铁素体 成分 形核率 

分 类 号：TG111.5[金属学及工艺—物理冶金]