激光功率对2195铝锂合金光纤-半导体激光复合焊接形貌与气孔的影响  

Effect of laser power on the morphology and porosity for 2195 Al-Li alloy fabricated by fiber-diode laser hybrid welding

作　　者：赵艳秋[1] 李响[1,2] 刘志强 颜廷艳 王磊磊 占小红[1] ZHAO Yanqiu;LI Xiang;LIU Zhiqiang;YAN Tingyan;WANG Leilei;ZHAN Xiaohong(Nanjing University of Aeronautics and Astronautics,Nanjing,211106,China;Application Process Laboratory,Wuxi Raycus Fiber Laser Technology Co.,Ltd.,Wuxi,214174,China)

机构地区：[1]南京航空航天大学,南京211106 [2]无锡锐科光纤激光技术有限责任公司应用工艺部,无锡214174

出　　处：《焊接学报》2023年第1期99-106,I0008,I0009,共10页Transactions of The China Welding Institution

基　　金：中央高校基本科研业务费专项资金资助(NF2022003、NS2022062)。

摘　　要：光纤-半导体激光复合焊接技术充分结合了光纤与半导体激光热源的优势,在激光加工领域拥有巨大的潜力.针对2195铝锂合金开展光纤-半导体激光复合焊接试验,并定量研究激光功率对焊接形貌与气孔的影响.结果表明,光纤激光功率显著影响焊缝熔深,半导体激光功率显著影响焊缝上熔宽.基于回归分析方法建立焊缝横截面积预测模型.此外,光纤与半导体激光均对焊缝气孔缺陷的控制起着重要的作用,较高的光纤激光功率有利于降低气孔缺陷.对于4 mm厚2195铝锂合金,采用光纤激光功率为3.0 k W、半导体激光功率为2.5~3.0 k W时,熔池温度高且光纤-半导体激光复合作用范围大,焊接接头气孔缺陷少.Fiber-diode laser hybrid welding technology,which adequately combines the superiorities of both fiber and diode laser heat source,has great potential in the field of laser processing.In this paper,fiber-diode laser hybrid welding experiments were conducted for the 2195 Al-Li alloy.The effect of laser power on morphology and porosity was quantitatively investigated.The results show that fiber laser power has a significantly impact on the weld depth,while diode laser power has a significantly influence on the upper weld width.The regression model for predicting the cross-sectional area of weld seam was obtained.Besides,both fiber and diode laser play an important role in the control of porosity defects.The higher power of fiber laser is beneficial to reduce porosity.For 2195 Al-Li alloy with the thickness of 4mm,the high-temperature molten pool and large range of fiber-diode laser action region are formed at the fiber laser power of 3.0 kW and diode laser power between 2.5 kW and 3.0 kW,which results in the welded joint with the less porosity.

关 键 词：激光功率 2195铝锂合金 光纤-半导体激光复合焊接 焊缝形貌 气孔 

分 类 号：TG456.7[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程]