Rigid-plastic finite element method and DEFORM-2D software were employed to simulate the forging process and distribution of primary equiaxial α phase of TC4 titanium alloy spool forging.The distribution of temperature field and the strain under two forging processes of hammer forging and press forging were compared.The simulation results show that it is easy to produce defects similar to cutting by hammer forging which can be solved through setting appropriate medial inclination of billet.The press forging is the better process of spool forging because of the relatively uniform distribution of temperature,effective strain,microstructure and the low risk of forging defects.The content of primary equiaxial α phase increases from edge to core of TC4 titanium alloy forging and the distribution basically conforms to the simulation by verification of microstructure.
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