摘要
采用恒应变速率拉伸方法研究了普通退火态(M态)和等温退火态(HT态)TA34钛合金管坯的冷成形性能,结果表明:M态TA34钛合金管坯的强度更高,最大应变硬化率更低,冷成形性能更好,更适用于波纹管的成形。采用有限元模拟的方法对DN85波纹管的成形参数进行仿真计算,得到最佳鼓波压力、成形压力和最大波深系数等成形参数。根据仿真模拟结果进行DN85波纹管成形工艺的探索,HT态管坯在波深系数1.162时即出现开裂,M态管坯在波深系数1.165、1.169、1.178时均未出现表面质量缺陷。以M态TA34钛合金管坯为坯料,选择合适的波纹管成形工艺参数可以制备出质量优良的TA34钛合金波纹管。
The cold forming property of TA34 titanium alloy tube blank in ordinary annealed state(M state)and isothermal annealed state(HT state)was studied by constant strain rate tensile test.The results show that the M state TA34 titanium alloy tube blank has higher strength,lower maximum strain hardening rate,better cold forming properties than the HT state,and is more suitable used for forming bellows.The finite element simulation method was used to simulate the forming parameters of DN85 bellows,and the parameters such as drum wave pressure,forming pressure and wave depth coefficient of DN85 bellows were obtained.According to the simulation results,the process of forming DN85 bellows was explored.The HT state TA34 titanium alloy tube blank will crack when the wave depth coefficient is 1.162.No surface quality defect is found for the M state TA34 titanium alloy tube blank when the wave depth coefficients are 1.165,1.169 and 1.178.By using the M state TA34 titanium alloy tube blank as the raw material and selecting the appropriate bellows forming process parameters,the TA34 titanium alloy bellows with good quality can be formed.
作者
应扬
郭荻子
杜宇
李婷
邹磊
解子人
Ying Yang;Guo Dizi;Du Yu;Li Ting;Zou Lei;Xie Ziren(Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)
出处
《钛工业进展》
CAS
2022年第6期1-6,共6页
Titanium Industry Progress
基金
陕西省科技重大专项(2020ZDZX04-01-02)。
关键词
波纹管
应变硬化指数
成形模拟
波深系数
bellows
strain hardening index
forming simulation
wave depth coefficient
