Abstract
The hot deformation of X100 pipeline steel was studied in the temperature range of 800~1200 °C and strain rate of 0.1~40s-1 on Gleeble-1500 thermal mechanical simulating tester. The effect of deformation conditions on the flow stress was analyzed. The constitutive equation of hyperbolic sine including Z parameter was used to describe the relationship between the peak stress and deformation conditions. The results indicate that the flow stress of X100 pipeline steel decreases with the increase of temperature and increases with the increase of strain rates. The hot deformation activation energy is 337.12kJ·mol-1.The average error between predicted values and experimental values of the peak stress is 3.85%, which proved that the model is reliable.
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