Study on Static Softening Behavior of Fine-grain High-strength IF Steel
The static softening behavior of fine-grain high-strength IF steel was studied by double-pass compression test on MMS-300 thermal mechanical simulator.The results show that the static softening rate increases with the increase of deformation temperature and holding time,the size of grain is bigger too.Through Z-hollomen parameters,the static recrystallization softening rate is calculated,and the static recrystallization activation energy is 186.73 kJ/mol.It is indicated that the recrystallization behaviorof fine-grain high-strength IF steel can happen easily.