Based on the cold expansion push-bending forming technology

the cold expansion push-bending forming die of superalloy pipe is designed and manufactured

and the deformation characteristics of 1D bending radius superalloy pipe are analyzed with the help of numerical simulation. The combination filling method of polyurethane with different properties is proposed

which successfully solves the collapse problem in the cold expansion push-bending forming process of superalloy pipe. Optimum process parameters of GH4169–G52×1.0 superalloy tube are obtained from three aspects: polyurethane packing

cylinder jacking pressure and lubrication conditions (friction). Accuracy of the process parameters is verified by experiments

and the engineering application of cold expansion push-bending forming of superalloy pipe is realized.