The research on vacuum isothermal bloom for powder metallurgy V-5Cr-5Ti alloy guiding by the constitutive models and the error analysis

For studying the vacuum isothermal bloom technology for V-5Cr-5Ti alloy, the isothermal hot compression tests are conducted on a computer controlled thermal simulation machine. The three kinds of constitutive equations of V-5Cr-5Ti alloy are deduced based on the data of the isothermal hot compression tests. The error for constitutive models and the optimum deformation condition are analyzed from several aspects. The isothermal hot blooming in vacuum is carried out guiding by the constitutive models and the optimum deformation conditions. Warm rolling is adopted for sheet manufacture of the blooming billet.91