不同成形工艺对7050铝合金壁板试验件拉伸性能的影响研究  

Effect of Different Forming Process on Tensile Properties of 7050 Aluminum Alloy Wallboard Test Piece

作　　者：王志坚[1] 王冬辉 尚晓峰[1] 张利[1] 王玲[2] 刘金玲[2] Wang Zhijian;Wang Donghui;Shang Xiaofeng;Zhang Li;Wang Ling;Liu Jinling

机构地区：[1]沈阳航空航天大学 [2]沈阳飞机工业(集团)有限公司

出　　处：《工具技术》2023年第5期44-48,共5页Tool Engineering

基　　金：国家自然科学基金青年科学基金项目(51205261)。

摘　　要：为探究采用数控成形、机加+轧压、机加+轧压+去应力退火三种不同成形工艺将7050-T7451铝合金板材呈10°弯曲成形情况下对拉伸性能的影响,通过静力拉伸试验研究了三种情况下7050铝合金板材在沿轧制方向(0°)和垂直于轧制方向(90°)的力学性能差异,并进行了金相观察。试验结果表明,数控成形下得到的型材屈服强度最高,90°方向的流体应力略低于0°方向的流体应力,其最大破坏载荷、抗拉强度和断后伸长率未表现出明显的差异性。三种不同成形工艺下的7050铝合金板材对其晶粒尺寸的影响较小。The tensile properties of 7050-T7451 aluminum alloy sheet bending at 10°are investigated by numerical control forming,machine adding+rolling pressing,machine adding+rolling pressing+stress relieving annealing.The mechanical properties of 7050 aluminum alloy sheet under different forming processes are studied by static tensile test in rolling direction(0°)and transverse(90°),and metallographic observation is carried out.The results show that the yield strength of the profile obtained by numerical control molding is the highest,and the fluid stress in the direction of 90°is slightly lower than that in the direction of oo.There is no significant difference in the maximum failure load,tensile strength and elongation after fracture.Three different forming processes have little effect on the grain size of 7050 aluminum alloy sheet.

关 键 词：成形工艺 7050铝合金 有限元仿真 

分 类 号：TG335[金属学及工艺—金属压力加工] TH162.1[机械工程—机械制造及自动化] V261[航空宇航科学与技术—航空宇航制造工程]