Mathematical model of ferrite transformation of Nb microalloyed steels through low temperature heavy deformation

作者：Xu Yunbo^*; Yu Yongmei; Wu Di; Wang Guodong

来源：Chinese Journal of Materials Research, 2006, 20(2): 131-135.

• Deformation induced transformation
• Ferrite transformation
• Hot strip rolling
• Kinetics modeling
• Low temperature heavy deformation
• Niobium microalloyed steel

Based on the transformation thermodynamics and kinetics, the nucleation and growth of ferrite grain during hot deformation in Nb microalloyed steels were investigated. In view of the effect of deformation stored energy, effective deformation ledge and alloying composition, the basic kinetics model was established to simulate deformation induced transformation behavior. The transformation is promoted and more volume fraction and finer grain are obtained at high strain and low temperatures, whereas the reverse is true as C or Mn content increases. The present models can be applied to simulate the evolution of microstructure during hot-strip rolling. The results are in good agreement with measured ones.

• 出版日期2006
• 单位东北大学