不同极性下的三丝间接电弧中厚板焊接研究

doi:10.3901/JME.2022.22.219

机械工程学报 ›› 2022, Vol. 58 ›› Issue (22): 219-226.doi: 10.3901/JME.2022.22.219

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不同极性下的三丝间接电弧中厚板焊接研究

徐国敏, 刁国宁, 王泽力, 刘黎明

大连理工大学材料科学与工程学院大连 116024

收稿日期:2021-11-27 修回日期:2022-05-06 出版日期:2022-11-20 发布日期:2023-02-07
通讯作者: 刘黎明(通信作者),男,1967年出生,博士,教授,博士研究生导师。主要研究方向为绿色低能耗焊接制造技术及装备。E-mail:liulm@dlut.edu.cn
作者简介:徐国敏,男,1993年出生,博士研究生。主要研究方向为间接电弧焊接技术。E-mail:1758264389@mail.dlut.edu.cn
基金资助:
国家自然科学基金资助项目(52175290)

Study on Triple-wire Indirect Arc Welding of Medium and Thick Plates with Different Polarity

XU Guo-min, DIAO Guo-ning, WANG Ze-li, LIU Li-ming

School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024

Received:2021-11-27 Revised:2022-05-06 Online:2022-11-20 Published:2023-02-07

摘要/Abstract

摘要： 三丝间接电弧焊是一种新型电弧焊技术,电弧放电通道形成于三个电极之间,电极极性的连接方式会对焊接过程产生重要影响。为揭示不同极性连接方式的三丝气体间接电弧中厚板焊接过程工艺特点,采用主丝接正和主丝接负的连接方式分别对8mm Q345低碳钢板进行了对接焊试验。结果表明,在两种极性连接方式的三丝间接电弧中厚板焊接过程中,由于电弧形态以及熔滴过渡路径的差异,主丝接正时的稳定性不受电弧所处阶段的影响;而主丝接负时,熔滴在焊接阶段容易发生短路爆炸造成焊接稳定性下降,这是焊缝表面气孔以及接头局部未熔合缺陷产生的主要原因;随着焊接电流的增大,两种极性下的电弧弧柱区宽度均增大,且主丝接正时的弧柱区的电子温度均大于主丝接负时的。

关键词: 中厚板, 间接电弧, 电子温度, 焊接稳定性

Abstract: Triple-wire gas indirect arc welding(TW-GIA) is a new type of arc welding technology. The arc discharge path is formed between three electrodes and the connection method of electrode polarity has a significant influence on the welding process. In order to reveal the characteristics of the triple-wire gas indirect arc welding medium and thick plate welding process under different polarity connections, the butt welding tests are carried out on 8 mm Q345 low carbon steel plates respectively under the conditions of main wire connected to the anode(MSA) or the cathod polarity(MSC). The results show that the entire stage stability under MSA is good while the welding stage stability under MSC decreased due to the occur of short-circuit explosions, resulting in the generation of pores on the bead surface and local unfused defects of the joint. As the welding current increases, both of the range of the arc column area is uniform and the electron temperature of arc column area under MSA is higher than that MSC's.

Key words: medium and thick plate, indirect arc, electron temperature, welding stability

中图分类号:

TG444

徐国敏, 刁国宁, 王泽力, 刘黎明. 不同极性下的三丝间接电弧中厚板焊接研究[J]. 机械工程学报, 2022, 58(22): 219-226.

XU Guo-min, DIAO Guo-ning, WANG Ze-li, LIU Li-ming. Study on Triple-wire Indirect Arc Welding of Medium and Thick Plates with Different Polarity[J]. Journal of Mechanical Engineering, 2022, 58(22): 219-226.

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不同极性下的三丝间接电弧中厚板焊接研究

Study on Triple-wire Indirect Arc Welding of Medium and Thick Plates with Different Polarity

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