徐刚, 李士琦, 王乐, et al. Experimental Study on Hot Deformation Behavior and Math Models for Deformation Resistance of EA4T Axle Steel for High Speed Rail[J]. Special Steel, 2013, 34(3): 60-63.
徐刚, 李士琦, 王乐, et al. Experimental Study on Hot Deformation Behavior and Math Models for Deformation Resistance of EA4T Axle Steel for High Speed Rail[J]. Special Steel, 2013, 34(3): 60-63.DOI:
试验用EA4T车轴钢(/%:0.26C、0.35Si、0.75Mn、0.011P、0.012S、1.04Cr、0.22Mo)由10 kg真空感应炉熔炼。用Gleeble-1500热模拟试验机对EA4T车轴钢进行高温单道次压缩试验以研究温度(950~1150℃)、应变量(0~0.8)和应变速率(0.1~20 s
0. 22Mo) is melted by a 10 kg vacuum induction furnace. The single pass reduction test on tested EA4T axle steel is carried out by using Gleeble-1500 thermal simulation machine to study the effect of temperature (950 ~ 1 150℃)
strain (0 ~0. 8) and strain rate (0. 1 - 20 s
-1
) on deformation resistance of this steel
and the a math model for hot deformation resistance of the steel is established. Results show that the dynamic recrystallization of the steel easily occurs at higher temperature and lower strain rate
its peak stress (σ
P
)
peak strain ( ε
P
) and steady strain (σ
s
) of test steel are all in linear relationship with parameter InZ; th
e peak and steady activation energy of test steel is respectively 320. 22 kJ/mol and 361. 91 kJ/mol ; and the deformation resistance calculated by predicted model is in good agreement with measured result.