2219铝合金拉拔式摩擦塞补焊成形过程分析

doi:10.3901/JME.2024.20.144

机械工程学报 ›› 2024, Vol. 60 ›› Issue (20): 144-152.doi: 10.3901/JME.2024.20.144

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2219铝合金拉拔式摩擦塞补焊成形过程分析

林智雄¹, 邵震¹, 梁鑫裕¹, 崔雷^1,2, 王东坡^1,2, 谢燕¹, 黄一鸣², 杨立军^1,2

1. 天津大学材料科学与工程学院天津 300350;
2. 天津市现代连接技术重点实验室天津 300350

收稿日期:2023-10-11 修回日期:2024-04-10 出版日期:2024-10-20 发布日期:2024-11-30
通讯作者: 杨立军,男,1966年出生,博士,教授。主要研究方向为过程测控电弧及激光等离子体物理。E-mail:yljabc@tju.edu.cn
作者简介:林智雄,男,1995年出生。主要研究方向为拉拔式摩擦塞补焊。E-mail:lzxmail1995@163.com;黄一鸣,男,1992年出生,博士,讲师。主要研究方向为焊接过程质量在线监控。E-mail:ymhuang26@tju.edu.cn
基金资助:
国家自然科学基金资助项目(‪52075376)。

Analysis of the Formation Process of AA 2219-T87 Friction Pull Plug Welding

LIN Zhixiong¹, SHAO Zhen¹, LIANG Xinyu¹, CUI Lei^1,2, WANG Dongpo^1,2, XIE Yan¹, HUANG Yiming², YANG Lijun^1,2

1. School of Materials Science and Engineering, Tianjin University, Tianjin 300350;
2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300350

Received:2023-10-11 Revised:2024-04-10 Online:2024-10-20 Published:2024-11-30

摘要/Abstract

摘要： 拉拔式摩擦塞补焊(Friction pull plug welding,FPPW)是一种高效率的固态修补焊接技术，广泛应用于航空航天领域。采用分阶段焊接和全过程焊接两种模式，分别研究12 mm厚铝合金FPPW成形过程和组织性能。结果表明，依据焊接过程拉力变化，可将FPPW划分为预摩擦阶段、拉力加载阶段、恒力焊接阶段和拉锻阶段。分阶段焊接结果表明，焊接初期，摩擦方式以滑动摩擦为主预热界面；随着焊接过程推进，热量上升，界面出现局部结合，滑动摩擦转化为滑动-粘着摩擦；焊接后期，在粘着摩擦主导作用下，界面具备焊合条件，并在拉锻阶段实现焊合。全过程焊接结果表明，焊接拉力为50 kN时，脆性第二相在结合界面连续分布，强度相对较低。随着焊接拉力增加至60 kN，结合界面第二相在摩擦挤压下破碎，降低了第二相的不利影响，强度得到提升。然而，焊接拉力升至70 kN时，接头发生颈缩，结合界面出现连续微小孔洞，强度明显下降。研究结果为中厚板FPPW成形提供了参考。

关键词: 2219铝合金, 拉拔式摩擦塞补焊, 成形过程, 力学性能

Abstract: Friction pull plug welding (Friction pull plug welding, FPPW) is a high efficient solid-state repair welding technology widely used in the aerospace field. In this study, 12mm thick aluminum alloy plates were selected to carry out FPPW trails. The method of emergency stop at different welding stages was applied to explore the forming process. The full-process welding was used to analyze microstructure and properties. According to the change of pull force, FPPW process could be divided into pre-friction stage, loading stage, constant force welding stage and forging stage. The results of emergency stop at different welding stages showed that in the early stage of welding, the sliding friction was the main friction mode and preheated the interface. The heat increased as the welding process progresses, and local bonding occurred at the interface. In the later stage of welding, adhesive friction played a dominant role so that the interface bonding condition emerged and then bonded well during the forging stage. The results of full-process welding showed that when the welding tensile force was 50 kN, a brittle second-phase continuously distribute on the bonding interface which lowered the bonding strength. As the welding tensile force was increased to 60 kN, the strength increased with the decreasing of the second phase in the bonding interface. However, when the welding tensile force rose to 70 kN, necking occurred at the joint and continuous tiny pores appeared on the bonding interface, resulting in a significant decrease in strength. These research results can provide a good reference for medium-thick plate FPPW forming.

Key words: 2219 aluminum alloy, friction pull plug welding, formation process, mechanical property

中图分类号:

TG455

林智雄, 邵震, 梁鑫裕, 崔雷, 王东坡, 谢燕, 黄一鸣, 杨立军. 2219铝合金拉拔式摩擦塞补焊成形过程分析[J]. 机械工程学报, 2024, 60(20): 144-152.

LIN Zhixiong, SHAO Zhen, LIANG Xinyu, CUI Lei, WANG Dongpo, XIE Yan, HUANG Yiming, YANG Lijun. Analysis of the Formation Process of AA 2219-T87 Friction Pull Plug Welding[J]. Journal of Mechanical Engineering, 2024, 60(20): 144-152.

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2219铝合金拉拔式摩擦塞补焊成形过程分析

Analysis of the Formation Process of AA 2219-T87 Friction Pull Plug Welding

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