Abstract
The submitted paper aimed to investigate the hot deformation behavior of CuCr0.6 alloy. Nil strength temperature of 1349 K and nil ductility temperature of 1313 K have been experimentally determined. Formability is monotonously increased with the decrease of forming temperature in the temperature range from 923 K to approx. 1273 K. The flow stress curves were obtained in the forming temperature interval of 923–1223 K and at a strain rate of 0.1–10 s^–1. After their analysis, the hot deformation activation energy of 340 kJ mol^–1 was calculated for peak stress and 393 kJ mol^–1 for steady state. This proves that the value of the activation energy depends upon a strain size.

Key words
copper alloy CuCr0.6, nil strength temperature, nil ductility temperature, flow stress curves, hot deformation activation energy

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