Study on Static Recrystallization Softening Behavior of 316LN Steel

In this paper, The experiments were carried out in Gleeble 1500D thermo-mechanical simulator by double-pass hot compression method. Offset method(0.2%) was used to determine the softening. The static recrystallization softening behavior of 316LN steel under different deformation conditions was studied and static recrystallization kinetics model was established. Deformation temperature is 900°C - 1050°C; strain is from 0.1 to 0.3; initial grain size is 75μm and 170μm; strain rate is 0.1s-1. The experimental results show that deformation temperature and strain and initial grain size are important factors which affect static recrystallization softening. The higher deformation temperature is, the larger strain is, the smaller initial grain size is, the larger static recrystallization softening is. Bused on experimental results, the static recrystallization kinetics model of 316LN steel is proposed with the activation energy of 353.253 kj/mol. These results provide a reference for theoretical development of static recrystallization and actual production of 316LN steel.