5A02铝合金变径管电磁成形工艺及材料性能  

Electromagnetic forming process and material properties of 5A02 aluminium alloy reducer pipe

作　　者：门向南 刘昊 邓涛 张晓林 苏红亮 张虹桃 张松 唐天宇 黄亮[2] Men Xiangnan;Liu Hao;Deng Tao;Zhang Xiaolin;Su Hongliang;Zhang Hongtao;Zhang Song;Tang Tianyu;Huang Liang(AVIC Chengdu Aircraft Industrial(Group)Co.,Ltd.,Chengdu 610092,China;State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;AVIC Chengfei Commercial Aircraft Co.,Ltd.,Chengdu 610073,China)

机构地区：[1]成都飞机工业(集团)有限责任公司,四川成都610092 [2]华中科技大学材料科学与工程学院材料成形与模具技术全国重点实验室,湖北武汉430074 [3]中航成飞民用飞机有限责任公司,四川成都610073

出　　处：《锻压技术》2024年第5期115-124,共10页Forging & Stamping Technology

基　　金：国家重点研发计划项目(2023YFB3407000);国家自然科学基金资助项目(52274382)。

摘　　要：基于5A02铝合金变径管电磁成形工艺,采用数值模拟和成形实验,并结合断口形貌分析,研究了线圈匝数和放电电压对变径管成形精度的影响规律,探明了电磁成形后5A02铝合金性能变化的原因。结果表明:随着放电线圈匝数的增加,磁场作用范围增大,当线圈匝数n为20时,管件能够实现良好的贴模;随着放电电压的逐渐增大,加工硬化和脉冲电磁场效应的共同影响导致材料的伸长率先增大后减小,抗拉强度和硬度增大后几乎不变,当放电电压为8 kV时,管件最大贴模间隙为0.12 mm,小于0.20 mm,满足成形要求;同时,随着放电电压的增大,管件拉伸断口的韧窝数量逐渐减少,但当放电电压升高至8 kV时,韧窝数量有所增加。Based on the electromagnetic forming process of 5A02 aluminum alloy reducer pipe,the influences of coil turns and discharge voltage on the forming accuracy of reducer pipe were studied by numerical simulation and forming experiments combined with fracture morphology analysis,and the reasons for the performance changes of 5A02 aluminum alloy after electromagnetic forming were explored.The results show that with the increasing of coil turns,the range of magnetic field action increases.When the number of coil turns n is 20,the pipe fittings could achieve good mold adhesion.As the voltage gradually increases,the combined effect of work hardening and pulse electromagnetic field leads to increase first and then decrease in the elongation of material.The tensile strength and hardness almost unchange after increasing.When the discharge voltage is 8 kV,the maximum die gap of pipe fittings is 0.12 mm,which is less than 0.2 mm meeting the forming requirements.Simultaneously,with the increasing of voltage,the number of ductile dimples on the tensile fracture surface of pipe fittings gradually decreases.However,when the voltage reaches 8 kV,the number of ductile dimples increases to some extent.

关 键 词：5A02铝合金 电磁成形 变径管 线圈匝数 放电电压 力学性能 

分 类 号：TG391[金属学及工艺—金属压力加工]