钛合金窄间隙激光填丝焊接工艺及接头组织性能分析  

Study on Welding Process and Microstructure and Properties of Titanium Alloy Narrow Gap Laser Filler Wire

作　　者：方乃文 黄瑞生 武鹏博 尹立孟[2] 龙伟民 徐锴 曹浩 邹吉鹏 FANG Naiwen;HUANG Ruisheng;WU Pengbo;YIN Limeng;LONG Weimin;XU Kai;CAO Hao;ZOU Jipeng(Harbin Welding Institute Limited Company,Harbin 150028,China;School of Metallurgy and Materials Engineering,Chongqing University Science&Technology,Chongqing 401331,China;State Key Laboratory of Advanced Brazing Filler Metals&Technology,Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]哈尔滨焊接研究院有限公司,哈尔滨150028 [2]重庆科技学院冶金与材料工程学院,重庆401331 [3]郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室,郑州450001

出　　处：《材料导报》2023年第10期186-193,共8页Materials Reports

基　　金：国家重点研发计划(2021YFB3401100);黑龙江省头雁行动计划-能源装备先进焊接技术创新团队资助(201916120);新型钎焊材料与技术国家重点实验室开放课题(SKLABFMT202005)。

摘　　要：采用自主研发的Ti-Al-V-Mo系钛合金药芯焊丝为填充金属,进行TC4钛合金板窄间隙激光填丝焊接工艺实验,研究激光功率、摆动参数、焊接速度和送丝速度等工艺参数对焊缝成形的影响规律,借助高速摄像系统研究焊接过程羽辉及等离子体特性,并对获得的焊接接头组织性能进行分析。研究结果表明:采用激光功率4.0 kW、圆形摆动模式、摆动频率100 Hz、摆幅2 mm、焊接速度0.42 m/min、送丝速度0.6 m/min的工艺参数组合下得到的焊缝成形良好,无明显外观缺陷,当焊丝末端与液态熔池接触距离为0 mm时,过渡方式为液桥过渡,可以实现焊丝熔化金属向熔池的稳定、有序过渡,该焊接工艺获得的20 mm厚TC4钛合金板窄间隙激光填丝焊接头组织性能良好。Aself-developed Ti-Al-V-Mo titanium alloy flux-cored wire was used as the filler metal in the experiment of narrow gap laser welding with filler wire for TC4 titanium alloy plate.The effects of laser power,oscillation parameter,oscillation mode,welding speed and wire feeding speed on weld formation were studied.The characteristics of plume and plasma in the welding process were investigated using high-speed camera system,and microstructures and properties of the welded joints were analyzed.The results showed that the weld formation was good with no obvious appearance defects found,with a laser power of 4.0 kW,a oscillation frequency of 100 Hz and oscillation range of 2 mm under the circular oscillation mode,a welding speed of 0.42 m/min,and a feeding speed of 0.6 m/min,when the end of the welding wire was 0 mm away from the liquid molten pool,the transfer mode was liquid bridge transfer,which helped to realize the stable and orderly transfer of the molten metal from the wel-ding wire to the molten pool,the 20 mm thick TC4 titanium alloy plate welded joint by narrow gap laser welding with filler wire using this welding technology achieved good microstructures and properties.

关 键 词：TC4钛合金 激光填丝焊 工艺参数 焊接接头 

分 类 号：TG456.7[金属学及工艺—焊接]