Abstract
The hot deformation behavior of steel 20 was investigated by conducting the isothermal uniaxial compression test using physical modeling complex Glee-ble 3500 within a temperature range of 1000–1200°С and a strain rate range of 0.1–1 s–1. The experimental yield curves shows critical points and sections, corresponding to main stages of a hot deformation process such as dynamic hardening, dynamic recovery, and dynamic recristallization. A comparative analysis of mathematical functions allowing us to describe rheological properties of steel 20 was conducted. The activation energy (Q) and the Zener-Hollomon parameter (Z) values were determined. The state equations of steel 20 were defined.
Keywords
Dynamic recrystallization, Gleeble 3500, hot deformation, rheological properties, Zener-Hollomon parameter, deformation stress.
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