Staggered spinning of thin-walled Hastelloy C-276 cylindrical parts: Numerical simulation and experimental investigation. (July 2019)

• Record Type: Journal Article
• Authors: Lin, Y.C.; Qian, Shu-Sheng; Chen, Xiao-Min; Li, Xin-He; Yang, Hui
• Is Part Of: Thin-walled structures. Volume 140(2019)
• Page Start: 466
• Page End: 476
• Publication Date: 2019-07
• Subjects: Spinning -- Thin-walled cylindrical parts -- Finite element model -- Dimensional accuracy; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2019.04.004
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: Staggered spinning is a cost-effective method to manufacture axisymmetric components, especially for the ultrathin cylindrical parts. However, due to the complex material flow behavior during staggered spinning of Ni-based thin-walled cylindrical parts, the accurate control of geometric precision is still a great challenge. In this work, a three-dimensional (3D) finite element model (FEM) is developed to investigate the effects of staggered spinning parameters on the dimensional accuracy of a thin-walled Hastelloy C-276 cylindrical part. It is found that the deviations of wall thickness and inner diameter are sensitive to spinning parameters. Based on the results from the finite element analysis, the optimized spinning parameters are obtained for the studied thin-walled cylindrical part, i.e., an appropriate wall thickness reduction range is 30%–40% during the single pass spinning. Meanwhile, the effects of feed ratio on the uniformities of wall thickness and inner diameter are significant, and a suitable feed ratio is 0.8 mm/r. Finally, the industrial three-roller staggered spinning experiments are carried out to verify a fact that the developed FEM, as well as the optimized spinning parameters, can be effectively used for the staggered spinning of thin-walled Hastelloy C-276 cylindrical parts. Highlights: Metadynamic recrystallization (MDRX) features of a superalloy with pre-precipitated δ phases are researched. Softening effects induced by MDRX are sensitive to deformation parameters and pre-precipitated δ phase. Coarsening of MDRX grains and dissolution of δ phase become weaken with reducing pre-precipitated δ phase. An improved MDRX kinetic model is developed considering the effects of pre-precipitated δ phases.