Welding Process and Precision Control Method of Lager Size, Thin Wall TA15 Titanium Alloy Drum

The welding deformation of titanium alloy sheet with large size and high precision requirements is difficult to control.By studying the welding process of 1.8 mm thick TA15 titanium alloy sheet, the welding process parameters of TA15 alloy and the weld distortion were obtained.The ϕ320 mm, 1.8 mm thick TA15 titanium alloy drum was welded by using the obtained welding process parameters, then the new designed deformation control tool and annealing process were used for deformation control.The results show that the diameter tolerance of ϕ320 mm TA15 titanium alloy drum is controlled in±0.3 mm by welding at proper pulse TIG welding process and annealing under the deformation control tool.