Friction Pull Plug Welding Process of 2219 Aluminum Alloy
LU Peng1, CUI Lei1, WANG Huimiao1,2, CHEN Yongliang1, WANG Dongpo1, SUN Zhuanping1,3, SONG Jianling3, ZHANG Zhongping3
1. School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China;
2. Capital Aerospace Machinery Corporation, Beijing 100044, China;
3. Tianjin Long March Launch Vehicle Manufacturing Co. Ltd., Tianjin 300462, China
In the study, friction pull plug welding (FPPW) process of 6–8mm thick 2219–T87 aluminum alloy was discussed. The results show that the structure of the plug and hole, the forming hole and the main welding parameters (axial load, welding speed and feed speed) have important influence on the weld formation. The use of circular arc-shaped plug rod, cylindrical plug hole and stepped tapered bottom hole can improve the flow direction and stress conditions of the base material and eliminate the unwelded defects. The welding speed is 7000r/min, the welding pressure is 20kN, the axial forging force is 20–30kN, and the feeding speed is 1.5mm/s. In the welded joint, the softening in the thermal mechanically affect zone on the base material side is the most obvious, and the hardness value is 79.9HV. Under the optimized parameters, the tensile strength of the welded joint can reach 365MPa, and the elongation is 6%, which is equivalent to 80% of the base metal.
基金资助:国家自然科学基金（51875401）。
作者简介: 卢鹏：硕士研究生，研究方向为航天铝合金的搅拌摩擦焊和摩擦塞焊。
引用本文:
卢鹏，崔雷，王惠苗，陈永亮，王东坡，孙转平，宋健岭，张忠平. 2219铝合金拉锻式摩擦塞补焊工艺研究[J]. 航空制造技术, 2019, 62(12): 55-64.
LU Peng, CUI Lei, WANG Huimiao, CHEN Yongliang, WANG Dongpo, SUN Zhuanping, SONG Jianling, ZHANG Zhongping. Friction Pull Plug Welding Process of 2219 Aluminum Alloy. Aeronautical Manufacturing Technology, 2019, 62(12): 55-64.
2019, 
