The invention relates to a production process of an ultrahigh-strength special-shaped
barrel. The production process comprises the following steps: preparing a
barrel blank according to the size;
material distribution grooves are symmetrically formed in the positions, close to the two ends, of the outer side of the
barrel, the sections of the
material distribution grooves are triangular, the outer angle of the outer side edge of each triangle ranges from 94 degrees to 100 degrees, and the outer angle of the inner side edge of each triangle ranges from 140 degrees to 160 degrees; the local mandrel is drawn out, specifically, the heating number is 1-2,
forging heating is conducted to 425-445 DEG C in each heating number, and only the part, located between the outer sides of the two
material distribution grooves, of the barrel blank is drawn out; and local trestle reaming: 1-3 heating numbers,
forging and heating each heating number to 425-445 DEG C, and only carrying out trestle reaming on the part of the barrel blank between the outer sides of the two material distribution grooves to drive the inner and outer diameters of flanges at the two ends of the barrel blank to grow together. According to the ultra-high-strength special-shaped barrel production process, materials are prevented from being accumulated at flanges at the two ends of a barrel body, meanwhile, the
utilization rate of the materials is increased, the
utilization rate of raw materials is increased to 38% from 28%, small-specification raw materials can be selected, and the forgeability, the
formability and the structure are all allowed to be greatly improved.