New Type Austenite Dynamic Recrystallization of Microalloyed Forging Steels 38MnVS During Forging Process

作者：Zhang Tong bo^*; Shen Yong; Liu Pan; Yong Qi long; Bao Yao zong

来源：Journal of Iron and Steel Research International, 2013, 20(5): 57-60.

• microalloyed forging steel
• activation energy
• dynamic recrystallization
• austenite grain size
• state chart
• 38MnVS

Hot compression tests of microalloyed forging steels 38MnVS were carried out on the Gleeble-3800 thermo-mechanical simulator at the deformation temperatures from 950 to 1 150 degrees C with the strain rates ranging from 0.1 to 10 s(-1). The effects of the deformation temperature and strain rate on the austenite dynamic recrystallization and microstructural changes were researched. The experimental results show that the dynamic recrystallization accelerated with the increase of the deformation temperatures and the decrease of the strain rate. The activation energy of dynamic recrystallization was calculated, which was about 275.453 kJ/mol. The relation between the dynamic recrystallization and the Z-parameter was investigated, and the state chart of the dynamic recrystallization of the microalloyed forging steel 38MnVS was made according to the experimental data and the deformation parameters.

• 出版日期2013-5
• 单位钢铁研究总院