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
旷小聪 1齐铂金 2杨建平 3鲁应焱4
作者信息
- 1. 北京航空航天大学,北京, 100191;北京遥感设备研究所,北京, 100854
- 2. 北京航空航天大学,北京, 100191
- 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
- 折叠
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.
Abstract
Based on high-speed camera and image pro-cessing 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 tra-ditional 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 concen-tration and temperature.Under the influence of high-fre-quency pulse current,both the axial pressure and radial electro-magnetic force of the welding arc increased,with maximum in-creases 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 res-ulting 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Key words
high-frequency pulse current/welding arc/electromagnetic force/molten pool flow引用本文复制引用
基金项目
国家自然科学基金资助项目(U20B2031)
出版年
2024
NETL
NSTL
维普
万方数据