Abstract
20CrMnTiH steel was studied on a Gleeble-3500 thermo-simulation in the temperature range of 850–1150°C and astrain rate range of 0.1–1 s−1. Plastic deformation behaviour was investigated, and to formulate a thermoplastic constitutive model, the Arrhenius equation was utilised. In addition, a modified Zener–Hollomon parameter considering the compensation of strain rate during hot compression was employed to improve the accuracy of the developed constitutive equation. Analysis results indicate that the constitutive model agrees well with experimental values and reveals the relationship of the flow stress, strain, strain rate and temperature, which provides the basis of numerical simulation of 20CrMnTiH forging process.
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