锻压技术

铝合金时效处理对钢/铝自冲铆接成形的影响

英文标题：Influence of aluminum alloy aging treatment on steel/aluminum self-pierce riveting

单位：1. 湖北汽车工业学院材料科学与工程学院 2. 阿维塔科技（重庆）有限公司 3. 东风汽车紧固件有限公司

分类号：TG166

出版年,卷(期):页码：2024,49(10):122-128

摘要：

针对6061-T6铝合金板，经过不同温度下的时效处理后，对其进行钢/铝自冲铆接实验，通过拉伸实验、金相、扫描电镜等研究了不同时效处理对自冲铆接接头力学性能和组织的影响规律。结果表明：时效温度对钢/铝自冲铆接成形有影响，时效温度为150、190和230 ℃时自冲铆接试样的内锁值分别为1.13、0.94和0.88 mm；时效温度对自冲铆接接头内锁区域的材料流动影响不大，铝合金材料部分呈流线型分层分布。随着时效温度的升高，自冲铆接接头中铝合金部分的金相组织析出的强化相数量增多、晶粒尺寸变大、合金的强度增大。150、190和230 ℃时效温度下自冲铆接接头的拉伸最大静载荷分别为3.46、3.28和3.12 kN，而接头的拉伸失效形式差别不大，均为上连接板撕裂失效，撕裂处均有剐蹭的痕迹，并分布有大小、深浅不一的韧窝。

After the aging treatment of 6061-T6 aluminum alloy plate at different temperatures, steel/aluminum self-pierce riveting experiments were conducted, and the influence laws of different aging treatments on the mechanical properties and organization of self-pierce riveting joints were studied by tensile experiments, metallographic, scanning electron microscopy etc. The results show that the aging temperature has an impact on the steel/aluminum self-pierce riveting forming, and the internal locking values of self-pierce riveting specimens at the aging temperatures of 150, 190 and 230 ℃ are 1.13, 0.94 and 0.88 mm, respectively. The aging temperature has little effect on the material flow in the internal locking area of self-pierce riveting joints, and the aluminum alloy exhibits the streamlined and layered distribution. With the increasing of aging temperature, the number of strengthening phases precipitated in the metallographic organization of aluminum alloy part in the self-pierce riveting joints increases, the grain size becomes larger, and the strength of alloy increases. The maximum tensile static loads of self-pierce riveting joints at the aging temperatures of 150,190 and 230 ℃ are 3.46, 3.28 and 3.12 kN, respectively. However, the tensile failure modes of joints are not significantly different, and all of which are tearing failure of the upper connecting plate, and there are scratch marks at the tearing points, and there are toughness dimples of different sizes and depths distributed.

基金项目：

湖北省科技重大专项（2022AAA001）；湖北省重点研发计划项目（2021BAB019）

作者简介：李兵（1981-），男，硕士，副教授,E-mail：libing42158823@163.com;通信作者：覃宇（1998-），男，硕士研究生,E-mail：1191726313@qq.com

参考文献：

[1]刘洋，何晓聪，邓聪，等.钛合金异质自冲铆接头力学性能及失效机理分析[J].实验力学，2018，33（1）：119-126.

Liu Y, He X C, Deng C, et al. Mechanical properties and failure mechanism analysis of titanium alloy heterogeneous medium self-piercing riveting joint[J]. Journal of Experimental Mechanics, 2018, 33(1):119-126.

[2]周泽杰，黄志超，李绍杰.AA5052/SPFC440异种金属自冲铆接数值模拟及试验研究[J].华东交通大学学报, 2022, 39(4):84-93.

Zhou Z J, Huang Z C, Li S J. Numerical simulation and experimental study on self-piercing riveted AA5052/SPFC440 dissimilar metals[J]. Journal of East China Jiaotong University, 2022, 39(4):84-93.

[3]Kwon D J, Park J, Yoo H M. Enhanced mechanical joining between carbon-fiber-reinforced plastic and steel plates using the clearance-filling effect of structural adhesive[J]. Applied Sciences, 2023, 13(7): 4332.

[4]丁伟，武传松.超声振动强化搅拌摩擦焊技术的研究进展[J].精密成形工程，2017，9（5）：63-72.

Ding W, Wu C S. Research progress of ultrasonic vibration enhanced friction stir welding[J]. Journal of Netshape Forming Engineering, 2017, 9(5):63-72.

[5]杜爱民，陈垚伊，韩业扬.三层板自冲铆接各层厚度组合对铆接质量的影响[J].机械，2022，49（4）：1-6.

Du A M, Chen Y Y, Han Y Y. Influence of thickness combination of three-layer plate self-piercing riveting on riveting quality[J]. Machinery, 2022, 49(4):1-6.

[6]王鹏，夏广明，张义和，等.铝板自冲铆接接头性能影响因素与失效模式研究[J].汽车工艺与材料，2022（10）：1-6.

Wang P, Xia G M, Zhang Y H, et al. Study on influence factors and failure modes of self piercing riveted joint of aluminum sheet[J]. Automobile Technology & Material, 2022(10):1-6.

[7]扶文生，张先炼，张青.5083铝合金自冲铆接成形机理与失效分析[J].塑性工程学报，2023，30（3）91-98.

Fu W S, Zhang X L, Zhang Q. Forming mechanism and failure analysis of self-piercing riveted of 5083 aluminum alloys[J]. Journal of Plasticity Engineering, 2023, 30(3):91-98.

[8]贾颖莲，何世松，李晓炀.DP590钢和AA6061铝合金自冲铆接接头的成形质量及静力学性能[J].锻压技术，2023，48（9）：119-129.

Jia Y L, He S S, Li X Y. Forming quality and static mechanical properties for self-piercing riveted joints of DP590 steel and AA6061 aluminum alloy[J]. Forging & Stamping Technology, 2023, 48(9):119-129.

[9]Su H L, Deng K B, Yang D Y, et al. Performance and failure analysis of perforated CFRP/aluminum alloy bonding and self-piercing riveting hybrid joints[J]. Engineering Failure Analysis, 2024, 156: 107803.

[10]Wituschek S, Kappe F, Meschut G, et al. Geometric and mechanical joint characterization of conventionally and tumbled self-piercing riveting joints[J]. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2023, 237(12): 2486-2496.

[11]Zhang Y, Lei B, Wang T, et al. Fatigue failure mechanism and estimation of aluminum alloy self-piercing riveting at different load levels[J]. Engineering Fracture Mechanics, 2023, 291: 109583.

[12]Huang Z C, Lu D C, Zhang Y C, et al. Mechanical performance and failure modes of self-piercing riveted joints between AA6061 and solution-treated TC4 alloy[J]. Materials Research Express, 2023, 10(5): 056510.

[13]邓云飞，李兵，张鹏，等.时效处理对6061-T6铝合金板组织和力学性能的影响[J].热加工工艺，2023，52（10）：134-137,144.

Deng Y F, Li B, Zhang P, et al. Effects of aging treatment on microstructure and mechanical properties of 6061-T6 aluminum alloy plates[J]. Hot Working Technology, 2023, 52(10):134-137,144.

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