Simulation on Hot Extrusion Process for φ220 mm TiAl Ingot Produced by VAR
The hot deformation constitutive equation of φ220 mm TiAl ingot produced by vacuum arc remelting was established by gleeble thermal compression experiment.The strain field and temperature field during the extrusion process under various extrusion conditions was investigated by numerial simulation.The experiment results show that the die angle has significant influence on the strain field,temperature field and the size of uniform deformation zone.The extrusion speed of ram has more influence on the temperature field than on strain field.