The compressive deformation behavior of EA4T steel was investigated at tempera- tures ranging from 950 to 1150℃ and strain rates from 0.1 to 20 s-1 on Gleeble-1500 thermo-simulation machine. The work hardening rate v...The compressive deformation behavior of EA4T steel was investigated at tempera- tures ranging from 950 to 1150℃ and strain rates from 0.1 to 20 s-1 on Gleeble-1500 thermo-simulation machine. The work hardening rate versus stress curves were used to determine the characteristic points of flow curves. The application of constitutive equations to determine the hot working constants of this material was discussed. Fur- thermore, the effect of Zener-Hollomon parameter （Z） on the characteristic points of flow curves was studied using the power law relation. The deformation activation energy of this steel was determined as 309.5 kJ/mol. Some behaviors were compared to other steels.展开更多
EA4T车轴钢(/%:0.22～0.29C、0.15～0.40Si、0.50～0.80Mn、≤0.020P、≤0.015S、0.90～1.20Cr、0.15～0.30Mo、≤0.06V)采用30 t EBT电弧炉40 t LF/VD-5 t铸锭工艺生产,并经8 MN油压机锻成300 mm x300mm钢坯,锻造比≥9。结果表明,EA4T...EA4T车轴钢(/%:0.22～0.29C、0.15～0.40Si、0.50～0.80Mn、≤0.020P、≤0.015S、0.90～1.20Cr、0.15～0.30Mo、≤0.06V)采用30 t EBT电弧炉40 t LF/VD-5 t铸锭工艺生产,并经8 MN油压机锻成300 mm x300mm钢坯,锻造比≥9。结果表明,EA4T钢[O]为(12-15)×10^(-6),[H]为(1.2～1.6)×10^(-6),经900～920℃淬火,600～650℃回火后,抗拉强度R_m721~745 N/mm^2,屈服强度R_eh463～470 N/mm^2,伸长率A_5 19.0%～19.5%,纵向冲击功53～73 J,横向冲击功36～41 J,组织为贝氏体一回火马氏体,10~7循环疲劳极限为350 N/mm^2。展开更多
文摘The compressive deformation behavior of EA4T steel was investigated at tempera- tures ranging from 950 to 1150℃ and strain rates from 0.1 to 20 s-1 on Gleeble-1500 thermo-simulation machine. The work hardening rate versus stress curves were used to determine the characteristic points of flow curves. The application of constitutive equations to determine the hot working constants of this material was discussed. Fur- thermore, the effect of Zener-Hollomon parameter （Z） on the characteristic points of flow curves was studied using the power law relation. The deformation activation energy of this steel was determined as 309.5 kJ/mol. Some behaviors were compared to other steels.
文摘EA4T车轴钢(/%:0.22～0.29C、0.15～0.40Si、0.50～0.80Mn、≤0.020P、≤0.015S、0.90～1.20Cr、0.15～0.30Mo、≤0.06V)采用30 t EBT电弧炉40 t LF/VD-5 t铸锭工艺生产,并经8 MN油压机锻成300 mm x300mm钢坯,锻造比≥9。结果表明,EA4T钢[O]为(12-15)×10^(-6),[H]为(1.2～1.6)×10^(-6),经900～920℃淬火,600～650℃回火后,抗拉强度R_m721~745 N/mm^2,屈服强度R_eh463～470 N/mm^2,伸长率A_5 19.0%～19.5%,纵向冲击功53～73 J,横向冲击功36～41 J,组织为贝氏体一回火马氏体,10~7循环疲劳极限为350 N/mm^2。
