锻压技术

2219时效强化铝合金隧道管成形工艺

英文标题：Forming process on 2219 aging strengthened aluminum alloy tunnel tube

作者：祝世强1 2 王永铭2 沈汝洵2 李杰2 王克环1 马哲2 杨迪2 周长乐2 田建桥2 刘祥龙2

分类号：TG386

出版年,卷(期):页码：2023,48(5):111-116

摘要：

以2219时效强化铝合金隧道管为研究对象，制定了先旋压制坯后内高压成形的工艺方案。通过工艺试验研究了热处理状态、减薄率和旋轮进给比等对管坯旋压成形的影响，优化了旋压工艺参数。利用有限元方法分析了两种内高压成形方案的变形特征，制定了合理的内高压成形工艺流程。结果表明：初始状态的管坯塑性较差，2219铝合金管坯的极限变形量小，经退火或淬火处理后，极限变形量大大提高。最终实现了Φ112 mm薄壁管的旋压成形，零件的厚度为1.51~1.58 mm、外径为Φ115.2~Φ115.6 mm。当内高压成形压力为65 MPa时，成形出合格的隧道管，零件的最大减薄率为7.74%。2219时效强化铝合金隧道管的力学性能较传统隧道管大幅提高。

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.

基金项目：

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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