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CuZn39Pb2 is a typical forged copper alloy widely used in various hot-forged valve bodies because of its super plasticity, high strength, and corrosion resistance. In this work, the deformation behavior of CuZn39Pb2 alloy at temperatures and strain rates of 650–750 °C and from 0.1 s −1  to 10 s −1  are investigated by isothermal hot compression tests on a Gleeble 3800 thermomechanical simulator. The experimental data are used to develop constitutive equations based on the Arrhenius-type equation. In the constitutive equations, the effects of true strain, deformation temperature, and strain rate on flow stress are incorporated and represented by the Zener–Hollomon parameter. The flow stress predicted by the constitutive equations agrees well with the experimental stress, which can be used in the finite-element simulation study of hot-forged CuZn39Pb2 alloy valve body.

Constitutive modeling of flow behavior of CuZn39Pb2 alloy under hot working conditions