Abstract: Isothermal compression tests of HMn62-3-3 alloy at temperatures ranging from 560 to 600 ℃ and strain rates from 0.01-10 s-1 were performed on the Gleeble-1500 thermo-simulation machine, the constitutive equation of HMn62-3-3 alloy and hot processing maps during the hot deformation process were established. The results showed that flow stress of HMn62-3-3 alloy decreased with the increase of deformation temperature and the decrease of strain rate. Under the experimental conditions, HMn62-3-3 alloy had the feature of dynamic recrystallization. Arrhenius hyperbolic sine function can well describe the constitutive equation of HMn62-3-3 alloy and the activation energy is about 201.525 kJ·mol-1. Processing maps were established based on the dynamic material model (DMM), the optimum ranges of deformation temperatures and rates are 610-640 ℃ and 2-10 s-1, respectively.
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