Abstract：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.
2022, 
