【摘要】 采用多道次大变形量冷轧加滚珠旋压工艺制备出Ti-Ta系近α型钛合金极薄壁管材，研究了再结晶退火时保温时间和退火温度对管材显微组织与力学性能的影响。结果表明：冷旋态管材呈纤维组织，且纵向相对横向更为明显；退火态管材横纵向均为等轴组织。管材退火时，显微组织与力学性能对保温时间不敏感，保温时间选择范围较宽；随着退火温度的升高，晶粒聚合长大，强度降低，塑性增加。经(620～680)℃/(10～60)min/FC退火后，Ti-Ta系极薄壁管材可满足波纹管成形性能要求。更多还原

【Abstract】 The multi pass cold rolling with large deformation and ball spinning process was used to prepare Ti-Ta system near α titanium alloy extremely thin-walled pipes. The effects of holding time and annealing temperature on the microstructure and mechanical properties of pipes during recrystallization annealing were studied. The results show that the pipe has fiber structure, and the longitudinal microstructure is more obvious than the transverse microstructure in cold spinning state. The annealed pipe has equiaxed structure in both transverse and longitudinal directions. The microstructure and mechanical properties of annealed pipe are not sensitive to the holding time, and the selection range of holding time is wide. With the increase of annealing temperature, the grain aggregates and grows, the strength decreases, and the plasticity increases; after annealing at(620～680)℃/(10～60)min/FC, the Ti-Ta system extremely thin-walled pipe meets the requirements of corrugated pipe formability.更多还原