Abstract
Analysis of the high temperature plastic behaviour of 100MnCrW4 tool steel was developed in the temperature range of 800 – 1200°C and the deformation rate in the range of 0.001 – 10 s−1 to the maximum value of the true strain 0.8. Microstructural changes were observed using light optical microscopy (LOM). The effect of hot deformation temperature on true stress, peak stress and true strain was evaluated by means of the flow curves. Based on these results, steel transformation was discussed from the dynamic recovery and recrystallization point of view. Furthermore, a present model, taking into account the Zener-Hollomon parameter was applied to predict the true stress and strain over a wide range of temperatures and strain rates. Based on the results, it can be stated that the proposed constitutive model suits our tool steel and can be applied to predict the behavior of the material during hot forming.
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