Preparation method of ultra-large-diameter copper-chromium-zirconium barrel for underwater equipment pressure cylinder

The invention relates to a preparation method of an ultra-large-diameter copper-chromium-zirconium barrel for an underwater equipment pressure cylinder. The preparation method comprises the following technological processes: proportioning, casting, saw cutting, ring rolling, solid solution treatment, machining, sizing wall-reducing rotary forming, aging, saw cutting of heads and tails, and inspection, packaging and warehousing. According to the method, the technological method of ring rolling-sizing wall-reducing rotary forming-aging strengthening is adopted, meanwhile, compared with direct forging forming, barrel manufacturing of a factory with the diameter larger than 3000 mm can be achieved, the size of a needed cast ingot is small, the quality of the cast ingot is guaranteed, and the yield reaches 50% and is doubled; according to the sizing wall-reducing whirling forming, the bending degree, the wall thickness precision and the outer diameter precision of the ultra-large-diameter cylinder can be controlle