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 ℃ with the strain rates ranging from 0.1 ...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 ℃ 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.展开更多
采用50 t电弧炉-50 t LF-60 t VD-180 mm×220 mm方坯连铸-热轧工艺生产F38MnVS非调质钢,在钢水入VD炉真空处理前加氮化锰线进行增氮操作,轧材后钢中氮含量稳定控制在(126-136)×10^(-6)钢材的力学性能、低倍组织、非金属夹杂...采用50 t电弧炉-50 t LF-60 t VD-180 mm×220 mm方坯连铸-热轧工艺生产F38MnVS非调质钢,在钢水入VD炉真空处理前加氮化锰线进行增氮操作,轧材后钢中氮含量稳定控制在(126-136)×10^(-6)钢材的力学性能、低倍组织、非金属夹杂物含量均满足用户要求。展开更多
文摘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 ℃ 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.
