高性能管材冷轧成形微观织构演变与调控研究进展

he high-performance tubes are extensively applied in core systems in aviation, aerospace, automotive and many other industries, which playing an important role in fluid transmission and structural load-bearing. The characteristics involves large deformation, high dimension accuracy and surface quality makes cold pilgering a favorable fabrication technology for hard-to-deform tubes. However, the tube undergoes a complex thermal loading path of multi-pass cold pilgering combined with intermediate and final heat treatment. The significantly inhomogeneous deformation leads to the complex evolution characteristics and the uncertainty of texture, which will significantly affect the subsequent formability and in-service performance of the tube. How to effectively control texture during whole cold pilgering process become the bottleneck of high-performance manufacturing of the tubes. In this paper, the principle and characteristics of cold pilgering process are firstly delineated. Then the studies on numerical modelling of macro inhomogeneous deformation and texture evolution of tube cold pilgering, the deformation features as well as the texture evolution mechanism and controlling method during cold pilgering process are reviewed. Finally, in response to the shortcomings in current research, the challenges and prospect for the texture precise control and high-performance preparation in multi pass cold pilgering of difficult-to-deform tubes are articulated.