Transactions of Materials and Heat Treatment

Title：Forming process on 2219 aging strengthened aluminum alloy tunnel tube

Authors： Zhu Shiqiang1 2 Wang Yongming2 Shen Ruxun2 Li Jie2 Wang Kehuan1 Ma Zhe2 Yang Di2 Zhou Changle2 Tian Jianqiao2 Liu Xianglong2

Unit： 1.School of Materials Science and Engineering Harbin Institute of Technology 2.Capital Aerospace Machinery Corporation Limited

KeyWords： spinning internal high pressure forming 2219 aluminum alloy tunnel tube thining rate

ClassificationCode：TG386

year,vol(issue):pagenumber：2023,48(5):111-116

Abstract：

For aging strengthened 2219 aluminum alloy tunnel tube, a process plan for spinning blank first and then internal high pressure forming was proposed. Then, the influences of heat treatment state, thinning rate and feeding ratio of spinning wheel etc. on the spinning forming of tube blank were studied by process experiments, and the spinning process parameters were optimized. Furthermore, the deformation characteristics of two internal high pressure forming schemes were analyzed by finite element method, and a reasonable internal high pressure forming process flow was developed. The results show that the plasticity of tube blank in the initial state is poor, and the ultimate deformation of 2219 aluminum alloy tube blank is small. After annealing or quenching treatment, its ultimate deformation is greatly increased. Finally, the spinning of Φ112 mm thin-walled tube is achieved, and its thickness is 1.51-1.58 mm and the outer diameter is Φ115.2-Φ115.6 mm. When the internal high pressure forming pressure is 65 MPa, a qualified tunnel tube is formed, and the maximum thinning rate of part is 7.74%. Thus, the mechanical properties of aging strengthened 2219 aluminum alloy tunnel tube are significantly improved compared with the traditional tunnel tube.

Funds：

作者简介：祝世强（1978-），男，硕士，高级工程师,E-mail：hitzsq@126.com,通信作者：王永铭（1982-），男，博士，高级工程师,E-mail：wangyongming211@163.com

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