冷轧加工率和热处理制度对超塑用TC4板材组织和性能的影响

Effect of Cold Rolling Reduction and Heat Treatment on Microstructure and Property of TC4 Plate for Super-Plastic Deformation

通过观察和测试不同冷轧和热处理工艺超塑用TC4板材的组织和力学性能,研究了冷轧加工率和热处理温度对TC4钛合金组织和性能的影响,优化了TC4板材的显微组织并测试了其超塑性能。研究结果表明：增加冷轧加工率,840~860℃热处理,有利于超塑用TC4板材得到均匀、无畸变、细小的再结晶组织,其室温强度可达到1060~1048MPa,延伸率为18%~18.5%;经组织优化后的超塑TC4板材在870℃,应变速率为2.4×10-3/s-1时,延伸率可达到894%。

Effect of cold rolling reduction and heat treatment on microstructure and mechanical prop- erty of TC4 titanium sheet is studied through observing and testing the microstructure and property of TC4 plates with different cold rolling and heat treatment processes. The microstructure of TC4 is optimizing, and the super- plastic property of TC4 plates is tested. The result shows that uniform, non-distorted and fine microstructures of TC4 plates are obtained by increasing cold rolling redtiction and annealing at 840-860 C . Its strength can reach to 1060-1048MPa, and its elongation can reach to 18%-18.5%. In the parameters of 870 ℃ and strain rate 2.4× 10-3/s-1, the elongation of microstrtlcture optimized TC4 plates can reach to 894%.