液压与非液压成型钛合金的显微组织及性能研究

Research on Microstructure and Properties of Titanium Alloy by Hydraulic and Non-hydraulic Forming

电磁脉冲是一种不同于液压的新型成型方式,具有较好的应用潜力。TA15钛合金管件分别经常规液压或电磁脉冲成型。成型钛合金的显微组织、力学性能和耐磨损性能的测试与分析表明:电磁脉冲成型钛合金晶粒较液压成型更细,合金力学性能和耐磨损性能更佳。与常规液压相比,电磁脉冲成型钛合金400℃抗拉强度增加57.48%、400℃断后伸长率增加34.24%、-20℃冲击功增加74.22%、400℃磨损体积减小57%。

Electromagnetic pulse shaping is a new type forming, which has a good application prospect. TA15 formed by hydraulic and electromagnetic pulse methods, of method compared with the normal hydraulic titanium alloy tube samples were respectively and the microstructures, mechanical properties and wear resistances of the formed samples were tested and analyzed. The results show that compared with that of hydraulic forming sample the grain size of titanium alloy formed by electromagnetic pulse sha- ping is smaller, with better mechanical properties and wear resistance. By comparison with normal hy- draulic forming, the tensile strength and elongation after fracture at 400 ℃ for the alloy by electromagnet- ic pulse shaping respectively increase by 57.48% and 34.24%, and its impact energy at -20 ℃ increa- ses by 74.22% with wear volume at 400 ℃ decreased by 57%.