Inconel-52M焊丝高频脉冲TIG电弧及熔池流动行为研究  

Study on the behavior of high-frequency pulsed TIG arc and molten pool flow of Inconel-52M welding wire

作　　者：旷小聪 齐铂金[1] 杨建平[3] 鲁应焱 KUANG Xiaocong;QI Bojin;YANG Jianping;LU Yingyan(Department of Material Processing and Control Engineering,School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,Beijing,100191,China;Beijing Institute of Remote Sensing Equipment,Beijing,100854,China;State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment,Dongfang Turbine Co.,Ltd.,Deyang,618000,China;Hangzhou Oxygen Plant Group Co.,Ltd.,Hangzhou,310000,China)

机构地区：[1]北京航空航天大学,北京100191 [2]北京遥感设备研究所,北京100854 [3]东方电气集团东方汽轮机有限公司,德阳618000 [4]杭氧集团股份有限公司,杭州310000

出　　处：《焊接学报》2024年第1期1-9,I0003,共10页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(U20B2031)。

摘　　要：基于高速摄像机和图像处理技术,分析了脉冲频率(0~60 kHz)对焊接电弧和Inconel-52M镍合金焊丝熔池流动行为的影响及其作用规律.结果表明,在常规低频脉冲电流上复合高频脉冲电流会使电弧形态显著收缩,随着高频脉冲频率的增加,电弧弧根尺寸逐渐减小.与常规低频脉冲焊相比,高频脉冲电弧的整体面积减小,核心区面积及其占比增加,电弧能量集中度和温度(能量)得到提高.在高频脉电流的作用下,电弧轴向压强和径向电磁力增大,最大可分别提高18.0%和8.1%.电弧轴向电磁压强增大导致熔池流动性增强,使焊缝液态金属流动更充分,从而易形成大焊缝宽度和低润湿角的焊缝形貌.Based on high-speed camera and image processing technology,the influence of pulse frequency(0-60 kHz)on the behavior of welding arc and molten pool flow of Inconel-52M nickel alloy welding wire was analyzed,as well as their underlying mechanisms.The results indicated that the combination of high-frequency pulse current on conventional low-frequency pulse current could significantly shrink the arc shape,and the arc root size would gradually decrease with the increase of high-frequency pulse frequency.Compared to traditional low-frequency pulse welding,the overall area of the high-frequency pulsed arc decreased,while its core area and proportion increased,leading to improved arc energy concentration and temperature.Under the influence of high-frequency pulse current,both the axial pressure and radial electromagnetic force of the welding arc increased,with maximum increases of 18.0%and 8.1%,respectively.The rise in axial pressure promoted the fluidity of the weld pool,enabling more complete liquid metal flow during the welding process and resulting in a weld morphology characterized by large width and low wetting angle.

关 键 词：高频脉冲电流 电弧 电磁力 熔池流动 

分 类 号：TG403[金属学及工艺—焊接]