采用2A14-T6铝合金圆锥塞棒和10 mm厚2219-T87铝合金板材进行异种铝合金摩擦圆锥塞焊工艺试验。对异种铝合金摩擦锥塞焊接头的缺陷特征、微观组织、强化相分布、力学性能及拉伸断口形貌进行观察与测试。结果表明：在焊接转速为7 500 r/min，焊接压力为30 kN和35 kN时得到了无缺陷的摩擦塞焊接头;摩擦塞焊接头可分为塞棒区(Plug metal， PM)、塞棒焊缝热力影响区(Plug thermo-mechanically affected zone， PTMAZ)、摩擦界面区(Friction interface zone， FIZ)、热力影响区(Thermo-mechanically affected zone， TMAZ)、热影响区(Heat affected zone， HAZ)和母材区(Base metal， BM)六部分;硬度测试结果显示，母材区硬度最高，塞棒区和塞棒焊缝热力影响区硬度略低于母材，热力影响区和热影响区最低。摩擦塞焊接头的抗拉强度最高可达312 MPa，伸长率可达4.1%;接头在下表面HAZ与TMAZ的交界处起裂，自下表面向上表面扩展，经过TMAZ，最终在上表面的PTMAZ断裂，断口呈韧窝形貌。

In this paper,friction plug welding(FPW) process of 10 mm thick 2219-T87 aluminum alloy with 2A14-T6 aluminum plug are performed. The defect characteristics, microstructures and phase distribution,mechanical properties,fracture morphology of FPW joints are observed and tested respectively. The results show：Defect-free FPW joints are obtained with a 30 kN or 35 kN welding pressure and a 7 500 r/min rotational speed; The FPW joint can be divided into six parts,plug metal(PM),plug thermo-mechanically affected zone (PTMAZ),recrystallized zone (RZ),thermo-mechanically affected zone(TMAZ),heat affected zone (HAZ) and base metal(BM); Hardness test results indicate that the highest hardness locates in base metal,followed by the plug zone and plug thermo-mechanically affected zone,with the lowest hardness occurred in thermo-mechanically affected zone and heat affected zone; The tensile strength and elongation of FPW joints can reach to 312 MPa and 4.1%,respectively; The initial fracture locates at the interface of TMAZ and HAZ on the bottom surface,finally fractures at PTMAZ,exhibiting dimple morphology.