2219铝合金交叉筋筒段固溶态温旋实验研究

Experimental study on cross-stiffened cylinder warm spinning of 2219 aluminum alloy after solution treatment

针对大型铝合金交叉筋筒段旋压后热处理变形大的问题,设计了"固溶-温旋-人工时效"的工艺路线,完成了旋压成形+固溶时效(T6态)和固溶-温旋-人工时效(T8态)两种工艺路线下的2219铝合金交叉筋筒段旋压试验,并分别对T6态和T8态样件的力学性能和微观组织进行了分析。试验结果表明:采用固溶态管坯在180~200℃进行温旋压,时效后的样件获得了较高的尺寸精度;与T6态样件相比,T8态样件的壁板拉伸性能、壁板和筋部维氏硬度均得到了提高,这得益于时效样件获得了更为细小的晶粒组织和更多的析出强化相。该工艺方法为航天大型带交叉筋筒段的工程研制提供了技术支持。

For the problems of sever deformation for heat-treated parts after spinning of large aluminum alloy cylinder with cross-stiffeners,a new process route of solid solution-warm spinning-artificial aging was designed,and the spinning tests of 2219 aluminum alloy cylinder with cross-stiffeners by spinning-solution aging(T6) and solution-warm spinning-artificial aging(T8) were completed.Then the mechanical properties and microstructures of T6 and T8 materials were analyzed respectively.The results show that the quenched tube is processed by warm spinning at 180-200 ℃,the samples have higher dimensional accuracy after aging,and compared with the T6 samples,the tensile properties of the panel and the Vickers hardness of the panel and stiffener for the T8 samples were improved,which is due to the finer grains micro-structure and more precipitation strengthening phase obtained during aging.Thus,the process method provides technical support for the development of large aerospace cross-stiffened cylinder manufacturing.