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研究了冷变形率和退火处理对TC2合金薄板组织和力学性能的影响。结果表明:钛合金板材随着冷变形率的增加,抗拉强度和硬度增高,晶粒随着冷变形量增加被拉长。该合金在27%~32%冷变形率和750℃×5 h的真空退火条件下,出现明显的软化现象。当变形率超过32%时,退火后合金的强度又随之上升,而伸长率随之下降。在28%变形率的板材退火后,已完全再结晶并获得均匀细小的等轴组织,而板材在43%变形率退火时,晶粒尺寸明显增大,板材强度上升而塑性下降。
The effects of cold deformation rate and annealing treatment on microstructure and mechanical properties of TC2 alloy sheet were studied. The results show that with the increase of cold deformation rate, the tensile strength and hardness of titanium alloy sheet increase, and the grains are elongated with the increase of cold deformation. The alloy shows obvious softening under the conditions of cold deformation of 27% ~ 32% and vacuum annealing at 750 ℃ for 5 h. When the deformation rate exceeds 32%, the strength of the alloy after annealing increases, while the elongation decreases. After 28% deformation, the sheet has been completely recrystallized and has uniform and fine equiaxed structure. When the sheet is annealed at a deformation rate of 43%, the grain size obviously increases and the sheet strength increases and the plasticity decreases.