耐候钢Q450NQR1深熔GMAW电弧行为

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (1): 12-21.

耐候钢Q450NQR1深熔GMAW电弧行为

张明华^*1,2, 张乾超¹, 黄秀培¹, 易冉³, 冯存义³, 洪波^1,2

1.湘潭大学机械工程学院, 湖南湘潭 411105;
2.焊接机器人及应用技术湖南省重点实验室, 湖南湘潭 411105;
3.中车株洲车辆有限公司, 湖南株洲 412003

收稿日期:2022-05-11 出版日期:2023-02-28 发布日期:2023-03-21
通讯作者: 张明华(1978-),女,甘肃兰州人,博士,讲师,硕导. Email:mhzhang@xtu.edu.cn

Arc behavior of deep penetration GMAW of weathering steel Q450NQR1

ZHANG Ming-hua^1,2, ZHANG Qian-chao¹, HUANG Xiu-pei¹, YI Ran³ FENG Cun-yi³, HONG Bo^1,2

1. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China;
2. Key Laboratory of Welding Robot and Application Technology of Hunan Province, Xiangtan 411105, China;
3. China Railway Rolling Stock Corporation Zhuzhou Co. Ltd., Zhuzhou 412003, China

Received:2022-05-11 Online:2023-02-28 Published:2023-03-21

摘要/Abstract

摘要： 分别采用深熔GMAW和脉冲MAG对耐候钢Q450NQR1进行了焊接试验,焊接过程中采集电流、电压及其对应的电弧图像,观察和分析了电弧形态和焊缝成型,同时基于图像处理考察了深熔GMAW焊接电流和焊接速度对电弧行为、焊缝成型的影响.结果表明:相比脉冲MAG,深熔GMAW电弧能量更集中,热源位置下降,焊缝熔深增加,且焊缝几何对称性较好;随着深熔GMAW焊接电流的增加和焊接速度的降低,电弧面积减小,边缘周长变短,质心位置下降,焊缝熔透深度增加;焊接电流315 A、焊接速度650 mm/min时焊接电弧最为稳定,焊缝成型质量也最好.采用优化的焊接工艺完成了12 mm厚Q450NQR1钢板材的单面焊双面成型,焊缝成型较好,接头各区域无软化和脆化现象.

关键词: 深熔GMAW, 高速摄像, 电弧形态, 图像处理, 焊缝成型

Abstract: The weathering steel Q450NQR1 was welded separately by using the deep penetration GMAW and pulse MAG. The welding current, voltage and the corresponding arc image during the welding was collected. The relationship between the dynamic behavior of the welding arc and the weld formation was analyzed by processing arc image. At the same time, the influence of the different welding current and welding speed under the deep penetration GMAW on the arc behavior and the weld formation was researched. The results showed that compared with pulsed MAG, deep penetration GMAW has more concentrated arc energy, lower heat source position, increased weld penetration, and good weld geometric symmetry; during deep penetration welding, as the welding current increases and the welding speed decreases, the arc area decreases, the arc edge perimeter becomes shorter, the arc centroid position drops, and the penetration depth of the weld increases; When the welding current is 315 A and welding speed is 650 mm/min, the welding arc is the most stable, and the weld seam forming quality is also the best. The single-side welding and double-side forming ofQ450NQR1 steel sheet with 12 mm thickness is completed by the optimized welding process, the weld is well formed, and there is no softening and embrittlement in each area of the joints.

Key words: deep penetration GMAW, high speed camera, arc behavior, image processing, weld formation

中图分类号:

TG442

张明华, 张乾超, 黄秀培, 易冉, 冯存义, 洪波. 耐候钢Q450NQR1深熔GMAW电弧行为[J]. 兰州理工大学学报, 2023, 49(1): 12-21.

ZHANG Ming-hua, ZHANG Qian-chao, HUANG Xiu-pei, YI Ran FENG Cun-yi, HONG Bo. Arc behavior of deep penetration GMAW of weathering steel Q450NQR1[J]. Journal of Lanzhou University of Technology, 2023, 49(1): 12-21.

参考文献

[1] ZHANG M,WU S,ZHANG Q,et al.Corrosion behavior of weathering steel Q450NQR1 and welded metal usingflux-cored wire in 0.01 mol/L NaHSO₃ solution [J].Int J Electrochem Sci,2020,15:8156-8170.
[2] DUTRA J C,GONCALVES E,SILVA R H,et al.High-performance GMAW process for deep penetration applications [J].Welding in the World,2020,64(6):999-1009.
[3] KAH P,SUORANTA R,MARTIKAINEN J.Advanced gas metal arc welding processes [J].The International Journal of Advanced Manufacturing Technology,2013,67(1/2/3/4):655-674.
[4] 吴向阳,田仁勇,张志毅,等.SMA490BW 耐候钢深熔焊工艺及接头的组织和性能 [J].电焊机,2020,50(10):65-69.
[5] 杨宝林,方孝钟,王鑫,等.P355NL1钢深熔焊与MAG焊接头力学性能对比研究 [J].焊接技术,2019,48(5):27-30.
[6] 兰志宇,李臣阳,赵旭,等.深熔焊技术在液压支架上的应用 [J].煤矿机械,2020,41(9):95-97.
[7] 李桓,李国华,李俊岳,等.熔化极电弧焊熔滴过渡过程的高速摄影 [J].中国机械工程,2002,13(11):12-16.
[8] LIU Y P,SUN X,WEN Z H.The application of MATLAB in welding image processing [C] //Applied Mechanics and Materials.Switzerland:Trans Tech Publications Ltd,2012,201:300-303.
[9] 杨运强,李桓,李俊岳,等.熔化极电弧焊多信息同步高速摄影 [J].焊接学报,2002(6):29-32.
[10] 郭波,石永华,易耀勇.基于电弧形态的熔滴过渡形式识别 [J].焊接学报,2017,38(11):27-31.
[11] 于英飞,朱志明,孙博文,等.焊接电弧图像的边缘检测及其批处理算法 [J].焊接学报,2018,39(11):17-21.
[12] SHIGETA M,IKEDA T,TANAKA M,et al.Qualitative and quantitative analyses of arc characteristics in SMAW [J].Welding in the World,2016,60(2):355-361.
[13] KAH P,LATIFI H,SUORANTA R,et al.Usability of arc types in industrial welding [J].International Journal of Mechanical and Materials Engineering,2014,9(1):1-12.
[14] CANNY J.A computational approach to edge detection [J].IEEE Transactions onPattern Analysis and Machine Intelligence,1986(6):679-698.
[15] AMSON J C.Lorentz force in the molten tip of an arc electrode [J].British Journal of Applied Physics,1965,16(8):1169-1179.
[16] 刘西洋,杨淼森,徐锴,等.激光介入不锈钢自保护药芯焊丝MAG电弧堆焊熔滴受力分析 [J].焊接学报,2019,40(9):65-70.
[17] 樊丁,马欣,武利建,等.外加轴向磁场对短路过渡的影响 [J].兰州理工大学学报,2021,47(1):22-27.
[18] 李士凯,陈茂爱,武传松.脉冲GMAW熔滴过渡动态过程的解析模型 [J].焊接学报,2004,25(2):47-51.
[19] ZHAO Y,SHI X,YAN K,et al.Effect of shielding gas on the metal transfer and weld morphology in pulsed current MAG welding of carbon steel [J].Journal of Materials Processing Technology,2018,262:382-391.
[20] 安藤宏平,长谷川光雄.焊接电弧现象 [M].施雨湘,译.北京:机械工业出版社,1985.
[21] WU C S,YANG F,GAO J.Effect of external magnetic field on weld pool flow conditions in high-speed gas metal arc welding [J].Proceedings of the Institution of Mechanical Engineers,Journal of Engineering Manufacture,2016,230(1):188-193.