铝合金拉拔式摩擦塞补焊成形及其对界面结合行为的影响  

Forming of aluminum alloy friction pull plug welding and its influence on interfacial bonding behavior

作　　者：邓越 崔雷[1] 王东坡[1] 邵震 赵衍华[2] 张丽娜[2] DENG Yue;CUI Lei;WANG Dong-po;SHAO Zhen;ZHAO Yan-hua;ZHANG Li-na(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China;Capital Aerospace Machinery Company,Beijing 100076,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350 [2]首都航天机械公司,北京100076

出　　处：《中国有色金属学报》2023年第9期2825-2838,共14页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(52075376)。

摘　　要：本文开展了2219铝合金拉拔式摩擦塞补焊(Friction pull plug weld,FPPW)试验,通过仿真分析揭示FPPW接头温度场与应力场的演变规律,并探讨了界面温度及应力分布特征对界面结合质量的影响。结果表明:在FPPW过程中,塞棒在主轴驱动下高速旋转并进给,当塞棒与母材接触时摩擦界面温度上升(500~520℃)。界面所受应力随温度的升高而降低;进入拉锻阶段后,塞棒停转并保持恒定轴向拉力进给,界面温度降至约280℃,界面所受应力逐渐增大,并沿厚度方向呈不均匀分布。分析认为,摩擦界面上的应力分布和峰值温度对界面结合质量有重要影响,而且提高界面应力分布均匀性,有助于促进界面冶金结合并提高接头强度。通过优化FPPW接头的几何形状显著提高了界面应力分布的均匀性,从而消除界面上分布的氧化物,促进塞棒与母材结合,提高接头力学性能。In this paper,the FPPW experiment of 2219 aluminum alloy was carried out,and the evolution of temperature and stress field of FPPW joint was summarized by simulation,and the influences of interfacial temperature and stress distribution on bonding quality were discussed.The results show that the interfacial temperature increases from 500℃to 520℃and the interfacial effective stress decreases with the increase of the temperature when the plug is driven by the spindle.With the plug stop turning and feed continually,the interfacical temperature drops to 280℃,and the interfacial effective stress increases gradually and distributes unevenly along the thickness direction.The results show that the higher the interfacial temperature and stress,the better the interface bonding quality,and the influence of interfacial stress on the bonding quality is stronger than the interfacial temperature.The analysis shows that the improvement of the FPPW joint structure can reduce the difference of the interfacial stress distribution,eliminate the oxides distributed on the interface,promote the bonding between the plug and the base material and improve the mechanical properties of the joint.

关 键 词：铝合金 摩擦塞焊 焊缝成形 界面组织特征 

分 类 号：TG456[金属学及工艺—焊接]