Hot compression deformation of steel wheel CL70 with strain rate 0. 01 ~ 10 s
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at 900 ~ 1300 ℃ has been tested and studied by using Gleeble-3800 thermo-mechanical simulator to analyze in hot deformation of the steel the relation between flow stress
strain rate and deformation temperature and get the flow stress constitutive equation. Results show that the flow stress increases of with the increase strain rates and decreases of temperature
and as the strain rate is less than 1 s
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the feature of dynamic recrystallization occurs obviously on flow stress curves of steel CL70. The hot deform activation energy of steel CL70 is 401.06 kJ/moL