Integral die forging forming method for spherical shell of manned cabin of titanium alloy bathyscaph

The invention provides an integral die forging forming method for a spherical shell of a manned cabin of a titanium alloy bathyscaph. The integral die forging forming method comprises the steps that a forge piece drawing is designed; a bar is blanked, and the bar is subjected to multiple times of upsetting; the forging temperature is T beta-(30-50 DEG C), and the deformation amount is 30%-55%; the forging temperature is T beta + (5-30 DEG C), and the deformation amount is 20%-50%; the forging temperature is T beta-(30-50 DEG C), and the deformation is 10%-20%; and heat treatment. The bathyscaph manned cabin spherical shell with the three outlook holes is integrally formed in a die forging mode, welding seams are eliminated, the welding risk and the overall production cost are reduced, the connection strength between the outlook holes and the spherical shell is guaranteed, and weak links are prevented. 本发明提供了一种钛合金深潜器载人舱球壳整体模锻成形方法，包括设计锻件图；棒材下料，对棒材进行多次镦粗；第一火模锻，锻造温度Tβ-(30～50℃)，变形量30％～55％；第二火模锻，锻造温度Tβ+(5～30℃)，变形量2