Forging method for improving structure properties of special TC4 titanium alloy

The invention belongs to the field of material machining and particularly relates to a forging method for improving structure properties of special TC4 titanium alloy. The method includes: firstly, performing beta-close area forging on special TC4 titanium alloy blank; then performing alpha+beta phase zone forging on the blank; finally, performing two-phase zone heat treatment to enable fine uniform equiaxed structure to be formed after forging. With the forging method, the strength, plasticity and fracture toughness of special TC4 titanium alloy forgings are enable to meet the expected requirements, the inspection level and structure reliability of the special TC4 titanium alloy forgings are effectively improved, and the novel titanium alloy material with high strength, high toughness, high damage tolerance and good fatigue performance can be machined successfully. 本发明属于材料加工领域，具体涉及种提高特TC4钛合金组织性能的锻造方法。本发明提高特TC4钛合金组织性能的锻造方法首先对特TC4钛合金坯料进行近β区域改锻，然后对坯料进行α+β相区锻造，最后进行两相区热处理，使其在锻造后形成细小均匀的等轴组织。本发明方法使特TC4钛合金锻件强度、塑性和断裂