Transactions of Materials and Heat Treatment

Title：Variable curvature stretch bending process of titanium alloy extruded thin wall profile

Authors： Zhu He Yang Lixin Lu Yingfeng Zhang Xiaozhe Zhou You Zhang Chunyang

Unit： (AVIC Shenyang Aircraft Company Limited Shenyang 110850 China)

KeyWords： TC2 titanium alloy extruded profiles stretch bending stretching force pre-stretching deformation amount

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2024,49(9):68-73

Abstract：

For the problem of surface wrinkles and even cracking defects after stretch bending caused by uneven wall thickness distribution of profile, the stretch bending process of domestic TC2 titanium alloy extruded thin-walled profiles was studied. Due to the characteristics of large circumference and large curvature deformation of profile stretch bending parts, based on detailed measurement of the wall thickness dimensions for profile, the stress, strain and deformation as well as the deformation characteristics during the stretch bending process of profile were first simulated and analyzed by software ABAQUS. Then, the simulation results were validated by the stretch bending process experiments of profile. The results show that when the pre-stretching force and the first cold stretching force are 23-29 MPa, the pre-stretching deformation amount is between 0.9% and 1.5%, and when the second cold stretching force is 15 MPa, the profile is formed well without serious defects such as cracking, local wrinkles and springback.

Funds：

基金项目:高精度钛/锆合金挤压型材制备技术(2017YFB0306200)

作者简介：祝鹤（1989-），男，学士，高级工程师 E-mail：hljq7777@163.com

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