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摘要
The hot deformation behavior of 55SiMnMo steel was studied by hot isothermal compression tests at 950-1100 degrees C and strain rates of 0.01-10 s(-1) using a Gleeble 3500 thermal simulation machine. Experimental results show that the peak stress increases with decreasing deformation temperature and increasing strain rate. When the strain rate epsilon= 0.01 s(-1), or when epsilon=0.1 s(-1) and the deformation temperature T >= 1000 degrees C, the dynamic recrystallization (DRX) of 55SiMnMo steel occurs. The hot flow stress constitutive equation, peak strain equation, as well as critical stress and strain for DRX initiation are obtained based on the experimental data. A comparison between the theoretical and experimental results verifies the reliability of the flow stress equation.
