Two-Roller Cold Pilger Rolling of High-Performance Tube: A Critical Review
LI Heng1,2, WEI Dong1,2, YANG Heng1,2, LI Guangjun3, ZHANG Duo1,2
1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
2. Department of Materials Forming and Control Engineering, School of Materials Science and Engineering, NorthwesternPolytechnical University, Xi’an 710072, China;
3. AVIC Chengdu Aircraft Industry (Group) Co., Ltd., Chengdu 610092, China
How to achieve the synchronous coordinating of dimensional and properties of high-performance and lightweight tubes has been a key issue in advanced manufacturing in many high-end industries such as aerospace. As one of preferred fabrication technologies for hard-to-deform tubes in aerospace industry, two-roller cold pilger rolling has unique advantages of large deformation, fine surface, and close dimensional tolerance since materials are incrementally subjected to triaxial compressive stress dominated local loading compared with drawing and extrusion, etc. However, the cold pilgering is a multi-stroke, non-steady, nonlinear and multi-factor coupling physical process. Unsuitable processing parameters may significantly affect both inhomogeneous deformation and texture evolution, thus easily resulting in the fluctuation of dimensions and properties of final tube product. The principle and characteristics of two-roller cold pilger rolling are firstly introduced, and then the studies on macro inhomogeneous deformation and micro texture evolution during cold pilger rolling are reviewed. The challenges on the synchronous coordinating of dimensions and properties of tubular materials during two roller cold pilger rolling are attempted to be summarized.