Secondary recrystallization in non-oriented electrical steels

Modelling of kinetics of grain growth process after primary recrystallisation in different types of non-oriented electrical steels is discussed. The ferrite grain growth behavior during secondary recrystallization was analysed by applying the general equation for grain growth. The activation energy for grain boundary motion in both semi-processed and fully processed steels was calculated. An idea of anisotropic mobility's is applied to the columnar grain growth description. It is shown that the value of activation energy for columnar grain development along progress normal direction is higher than the one for rolling direction.