Abstract: The service conditions of aluminum alloy components in aerospace were getting severer, and the higher strength and accuracy of components were required. Regarding electromagnetic flanging and heat treatment processes of aluminum alloys, whole process route of electromagnetic flanging was proposed through comparing and optimizing various process routes, so that structural parts with better performance were obtained. The flanged parts following the selected whole process route show excellent forming quality with satisfied size accuracy and good circumferential uniformity. The mechanics properties of the flanged parts were substantially improved, since the hardness was increased significantly and distributed uniformly. The proposed optimal electromagnetic flanging process was annealing-solution quenching-electromagnetic flanging-artificial aging. The proposed whole process route may be widely applied to forming local features on components in aerospace, for example, the hole flanging on propellant tanks for launch vehicles.

Key words: 2219 aluminum alloy, mechanics property, electromagnetic flanging, heat treatment, whole process route

摘要： 航空航天用铝合金构件的服役条件日趋严苛，要求构件具备更高的强度和精度。基于铝合金电磁翻边与热处理工艺，通过规程控制优选出电磁翻边全流程工艺路线，以期获得服役性能更好的结构件。结果表明:全流程工艺下的成形件尺寸精度满足要求，周向均匀性良好，成形质量高；成形件的硬度显著提高且分布均匀，力学性能大幅度提升。获得最优的电磁翻边全流程工艺为：退火—固溶淬火—电磁翻边—人工时效。该全流程工艺可广泛应用于航空航天领域构件，如航天运载火箭的推进剂贮箱、局部特征结构的翻边成形。

关键词: 2219铝合金, 力学性能, 电磁翻边, 热处理, 全流程工艺