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研究了不同变形量和热处理制度对Ti45Nb合金丝材微观组织和力学性能的影响。只有当退火温度高于810℃时,合金丝材才能发生完全再结晶;随着变形量的不断增大,丝材经退火处理后抗拉强度和屈服强度显著增强,而延伸率和断面收缩率有所降低;充氩快速冷却后,丝材的屈服强度较随炉慢速冷却的丝材显著降低,这可能与快冷过程中组织析出α″相有关。采用压缩试验对比了TA1和Ti45Nb合金丝材冷变形能力的差异,并使用加工态Ti45Nb合金丝材镦制了铆钉,研究了退火前后铆钉头部激烈变形区微观组织的差异。
The effects of different deformation amount and heat treatment on the microstructure and mechanical properties of Ti45Nb alloy wire were studied. Only when the annealing temperature is higher than 810 ℃, the alloy wire can undergo complete recrystallization. With the increase of the deformation, the tensile strength and yield strength of the wire are significantly increased after annealing, while the elongation and reduction of area After cooling rapidly with argon, the yield strength of the wire decreased significantly compared with the wire cooled slowly, which may be related to the α "phase of the microstructure during the rapid cooling.The compressive strength of the Ti1 and Ti45Nb alloys The difference of the cold deformation ability of the rivets was also studied. The rivets were fabricated by processing the Ti45Nb alloy wire. The differences of the microstructure of the rivets in the fierce deformation zone before and after annealing were studied.