The invention relates to the technical field of
titanium alloy crystal preparation, in particular to a large-size
titanium alloy forge piece
isothermal forging and
single crystal regeneration synergistic preparation method which comprises the steps that a
forging material
ingot is heated, after heat preservation, the
forging material
ingot is discharged out of a furnace to be subjected to upsetting, drawing-out and
air cooling after
forging, the forging material
ingot is heated again to be above a
beta phase transformation point, upsetting, drawing-out and
air cooling after forging are continued, and a blank is obtained; the blank is heated to the temperature below the
beta phase transformation point, and upsetting, drawing and
air cooling are conducted; heating to a temperature above a
beta phase transformation point, homogenizing, upsetting, drawing out and air-cooling; finally, heating to below a beta phase transformation point, upsetting, drawing to a target
diameter, and
cutting to obtain a forging stock; the forging stock is subjected to die forging forming in an
isothermal forging mode, the
strain rate is adjusted in a self-adaptive mode according to the
crystal characteristics of the forging stock, and a die forging blank is obtained; and after standing in water, carrying out aging heat treatment, and carrying out air cooling after heat preservation to obtain the
titanium alloy beta-phase
crystal. According to the method, the forging effect is optimized, and the uniformity of beta-phase crystals of the
titanium alloy is ensured.