2219铝合金拉拔式摩擦塞补焊成形行为及其对界面结合质量的影响  

Forming behavior of friction pull plug welding for 2219 aluminum alloy and its effect on interfacial bonding quality

作　　者：高宝祺 赵衍华 张丽娜 邵震 管卫 黄一鸣 崔雷[1,2] GAO Baoqi;ZHAO Yanhua;ZHANG Lina;SHAO Zhen;GUAN Wei;HUANG Yiming;CUI Lei(School of Material Science and Engineering,Tianjin University,Tianjin,300350,China;Tianjin Key Laboratory of Advanced Joining Technology,Tianjin,300350,China;Capital Aerospace Machinery Co.,Ltd.,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]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

出　　处：《焊接学报》2025年第2期7-17,71,共12页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(52075376)。

摘　　要：针对2219铝合金拉拔式摩擦塞补焊(friction pull plug welding,FPPW)接头界面结合质量提升的问题,基于FPPW试验和仿真分析了接头成形过程中温度场、应变场和正应力场演变规律,及这些因素对界面结合质量的影响.结果表明,在焊接过程中,当塞棒旋转进给时,摩擦界面上的峰值温度可达到约525℃,周围材料产生剧烈的塑性变形.分析界面上的正应力场可知,沿板厚方向正应力的分布不均匀,呈现先上升后下降的趋势;当塞棒停转后,界面上的温度降低,塑性变形没有明显增加,上部界面的正应力增加,显著大于下部界面的正应力.分析认为,相对于温度和塑性应变,正应力对界面结合质量的影响更加显著.通过调整界面附近发生塑性流动的材料体积,可以增大正应力并改善其分布均匀性,将更多新鲜金属挤入氧化膜破碎的区域,增加新鲜金属实际接触面积,进而显著提高界面结合质量和接头拉伸性能.Aiming at improving the interfacial bonding quality of friction pull plug welding(FPPW)joints for 2219 aluminum alloy,the evolutions of temperature,plastic strain,and normal stress field during forming of joints were investigated on the basis of both experimental and simulation results,as well as their influence on interfacial bonding quality.The results indicate that during the welding process,when the rotating plug rotates and feeds,the interfacial temperature increases to about 525℃,and the material around the interface experiences severe plastic deformation.It can be analyzed that the interfacial normal stress shows nonuniformity throughout the thickness of the plate,exhibiting an initial increase followed by a subsequent decrease.When the plug stops rotating,the interfacial temperature decreases and plastic strain shows no obvious increase.The normal stress at the upper interface increases and exceeds that at the lower interface.It can be analyzed that the normal stress shows more obvious effect on the interfacial bonding quality compared with temperature and plastic strain.By adjusting the volume of plastic flow material near the interface,the normal stress increases and exhibits uniform,resulting in more fresh metal being extruded into the broken area of oxide film,and increasing the real contact area of fresh metal.The interfacial bonding quality and tensile property of joints can be effectively improved.

关 键 词：拉拔式摩擦塞补焊 铝合金 接头成形 拉伸性能 

分 类 号：TG453[金属学及工艺—焊接]