横向交变磁控DP-TIG焊电弧熔池特性研究

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (4): 22-25.

横向交变磁控DP-TIG焊电弧熔池特性研究

瞿怀宇^*1, 刘芬霞¹, 刘文兰², 冯晓春¹, 余江瑞¹, 付小月¹

1.兰州理工大学技术工程学院, 甘肃兰州 730050;
2.兰州理工大学能源与动力工程学院, 甘肃兰州 730050

收稿日期:2021-01-30 出版日期:2021-08-01 发布日期:2021-09-07
通讯作者: 瞿怀宇(1987-),男,湖北广水人,硕士,工程师.Email:475473069@qq.com
基金资助:
甘肃省高等学校创新基金(2020B-283)

Study on arc and pool characteristics of DP-TIG welding with additional transverse alternating magnetic field

QU Huai-yu¹, LIU Fen-xia¹, LIU Wen-lan², FENG Xiao-chun¹ YU Jiang-rui¹, FU Xiao-yue¹

1. College of Technology and Engineering, LanzhouUniv. of Tech., Lanzhou 730050, China;
2. College of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2021-01-30 Online:2021-08-01 Published:2021-09-07

摘要/Abstract

摘要： 外加交变磁场可改善大电流高速焊接时的焊缝成形缺陷,为获得不同励磁参数对DP-TIG(deep penetration,TIG)焊接电弧和熔池特性的影响,在横向交变磁场作用下,对12 mm的Q345B板进行了DP-TIG焊接试验.通过高速摄像系统观察电弧形态,采用小孔法测量电弧压力,基于金相腐蚀法分析熔池截面.结果表明:与无磁场作用时的DP-TIG电弧相比,在横向交变磁场作用下,DP-TIG电弧形态发生明显变化,电弧压力峰值随交变频率的增大先降低后增大,熔池截面形态由指状向锅底状过渡,且镍基堆焊时,焊缝表层铁含量在5%以内,焊材被稀释程度较低.

关键词: DP-TIG, 横向磁场, 电弧形态, 熔池特性

Abstract: The defects of weld profiles in large-current and high-speed welding can be improved by adding alternating magnetic field. In order to obtain the influence of different magnetic excitation parameters on the arc and pool characteristics of DP-TIG (deep penetration TIG) welding, the DP-TIG welding experiment of 12 mm Q345B plate was carried out with additional transverse alternating magnetic field. The arc shapes were observed by a high-speed camera system, the arc pressures were measured through the small hole method, and the weld pool section profiles were analyzed based on the metallographic corrosion method. The results show that, compared with DP-TIG welding without magnetic field, the arc shape of DP-TIG welding with additional transverse alternating magnetic field changes obviously, the peak value of arc pressure first decreases and then increases with the increase of alternating frequency, and the weld pool section profile transits from finger-shape to pot-bottom-shape. In addition, the iron content in the weld surface of Ni-based overlay welding is less than 5%, and the dilution degree of welding material is low.

Key words: DP-TIG, transverse magnetic field, arc shape, pool characteristic

中图分类号:

TG403

瞿怀宇, 刘芬霞, 刘文兰, 冯晓春, 余江瑞, 付小月. 横向交变磁控DP-TIG焊电弧熔池特性研究[J]. 兰州理工大学学报, 2021, 47(4): 22-25.

QU Huai-yu, LIU Fen-xia, LIU Wen-lan, FENG Xiao-chun YU Jiang-rui, FU Xiao-yue. Study on arc and pool characteristics of DP-TIG welding with additional transverse alternating magnetic field[J]. Journal of Lanzhou University of Technology, 2021, 47(4): 22-25.