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| 铝合金拉拔式摩擦塞补焊技术研究进展 |
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邵 震1,2, 张粟泓3, 黄一鸣1,2, 张丽娜3, 孙世烜3, 崔 雷*1,2, 赵衍华3
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1. 天津大学材料科学与工程学院，天津 300350;2. 天津大学天津市现代连接技术重点实验室，
天津 300350;3. 首都航天机械有限公司，北京 100076
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| 摘要: |
| 拉拔式摩擦塞补焊（Friction pull plug welding, FPPW）是一种固相焊接修补技术，在大径厚比中空结构的补焊方面具有明显优势。焊接过程中材料在熔化温度以下经历剧烈塑性流动，避免了熔化焊接可能带来的凝固缺陷，提升了补焊接头力学性能。但与传统摩擦焊工艺不同，FPPW是一种侧壁摩擦连接技术，在轴向拉力的作用下通过塞棒侧壁挤压试板形成冶金结合。焊接过程中摩擦界面附近温度、应力、应变等分布不均匀，极易产生未焊合或弱结合等焊接缺陷。对缺陷进行有效抑制是实现高质量FPPW的核心。本文从FPPW基本原理、接头成形行为、成形质量控制（接头几何形状设计、焊接工艺参数）、接头微观组织及力学性能等方面对高强铝合金FPPW研究现状进行综述，并进一步展望了FPPW技术未来发展趋势。 |
| 关键词: 拉拔式摩擦塞补焊 成形质量 接头设计 工艺参数 力学性能 |
| 基金项目:国家自然科学基金（520***76）；优秀青年科学基金（523***08） |
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| Research Status of Friction Pull Plug Welding for Aluminum Alloy |
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Shao Zhen1,2, Zhang Suhong3, Huang Yiming1,2, Zhang Lina3, Sun Shixuan3, Cui Lei*1,2, Zhao Yanhua3
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1. School of Material Science and Engineering, Tianjin University, Tianjin 300350;2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300350;3. Capital Aerospace Machinery Co., Ltd., Beijing 100076
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| Abstract: |
| Friction Pull Plug Welding (FPPW) is a solid-state welding repair technique that demonstrates significant advantages in repairing large diameter-to-thickness hollow structures. During the welding process, the material undergoes severe plastic flow below the melting temperature, avoiding solidification defects that may arise from fusion welding. Unlike conventional friction welding processes, FPPW is a sidewall friction connection technique, where a metallurgical bonding is formed through the extrusion of the plug sidewall against the workpiece under axial force. The distribution of temperature, stress, and strain near the friction interface during welding process is extremely uneven, making defect suppression critical for achieving high-quality FPPW joint. This paper provides a comprehensive review of high-strength aluminum alloy FPPW technology, focusing on the basic principle, the thermal deformation process, joint formation quality control (joint geometric design, welding process parameters), microstructure and mechanical properties, and further discusses future development trends of FPPW technology. |
| Key words: friction pull plug welding formation quality joint design welding parameters mechanical properties |
