Research on Hot Deformation Behavior of 45 Steel in Low Temperature Region
ZHOU Jia-lin1， SHI Mi1， ZHANG Pei-yi1， YANG Guang-yu1， YU Ru1， DAI Yuan2
1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education， Wuhan University of Science and Technology， Wuhan 430081， Hubei， China 2. Hot Rolling Factory, Wuhan Iron and Steel Group Co., Ltd., Wuhan 430080， Hubei， China
Abstract：The effect of different deformation conditions on the deformation behavior of 45 carbon structural steel at low temperatures was studied using Gleeble-1500 thermal-simulation machine. Experimental results show that peak stress increased with the decreasing of deformation temperature and the increasing of strain rate; dynamical recovery occurred when strain rate [ε]≥0.01 s-1, and deformation temperature [t]＜500 ℃; dynamical recrystallization occurred when strain rate [ε]≤1 s-1, and deformation temperature [t]≥500 ℃. The flow stress models at work harding-dynamical recovery stage and dynamical recrystallization stage were both established based on the Sellars-Tegart equation. The parameters in these models were fitted according to the experimental results. The stress-stain curves of both dynamic recovery style and dynamic recrystallization style were successfully predicted. The straightening force at low temperature of 45 steel plates in the industrial trial was predicted, and the results matched well with the measured values.
周家林， 史 密， 张陪毅， 杨光宇， 余 茹， 代 元. 45钢低温区热变形行为研究[J]. 钢铁, 2014, 49(10): 62-65.
ZHOU Jia-lin， SHI Mi， ZHANG Pei-yi， YANG Guang-yu， YU Ru， DAI Yuan. Research on Hot Deformation Behavior of 45 Steel in Low Temperature Region. Iron and Steel, 2014, 49(10): 62-65.
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2014, Vol. 49 
