DP590镀锌双相钢CMT焊接接头气孔及锌层研究

doi:10.3901/JME.2023.16.213

摘要/Abstract

摘要： 镀锌钢因其优异的耐腐蚀性,常用于车身制造中,因此其焊接性受到广泛研究,而CMT焊接镀锌钢板时飞溅少,可以减少出现气孔的可能性,故CMT在镀锌钢板焊接应用中具有极大的优势。采用1.0mm厚的DP590热镀锌双相钢作为焊接母材,选用直径1.0 mm的BHG-2M焊丝作为焊接材料,利用CMT数字化焊机进行搭接焊。控制送丝速度与焊接速度作为焊接工艺参数,研究不同焊接工艺参数下焊接接头气孔和锌层烧损情况。通过能谱仪对锌层成分进行分析,并测量焊接接头正反面锌层烧损宽度。结果表明,焊缝中气孔的产生和焊接线能量密切相关,线能量越大,气孔率越低。焊缝上表面中心烧损严重,Zn元素基本完全蒸发,两侧烧损程度逐渐递减,越靠近焊缝中心的下表面锌层氧化程度越大。增加焊接速度或减小送丝速度,焊缝锌层烧损程度降低。

关键词: DP590镀锌双相钢, 冷金属过渡焊, 气孔, 锌层

Abstract: The galvanized steel is commonly used in car body manufacturing for its excellent corrosion resistance, so its weldability has been widely studied. CMT welding has less splash when welding galvanized steel plate, which can reduce the possibility of pores.CMT has great advantages in galvanized steel plate welding application. The DP590 galvanized steel with a thickness of 1.0 mm is taken as the welding base material, and the BHG-2M welding wire with a diameter of 1.0 mm is used as the welding material. The CMT digital welder is used for lap welding. Wire feeding speed and welding speed are adjusted as the welding process parameters to study the porosity and zinc layer of welding joint under different welding process parameters. The composition of zinc layer is analyzed by energy dispersive spectrometer and the width of zinc layer is measured. The results show that the generation of pores in the weld is closely related to the welding heat input. The higher the heat input, the lower the porosity. The center of the upper surface of the weld is severely burned. Zn is almost completely evaporated. The degree of burn on both sides gradually decreases. The closer to the center of the weld, the greater the oxidation degree of the zinc layer on the lower surface. Increasing the welding speed or reducing the wire feeding speed will reduce the burning degree of the zinc coating in the weld.

Key words: DP590 galvanized dual-phase steel, cold metal transfer welding, pore, zinc coating

中图分类号:

TG457

刘岩, 刘澳, 张琳琳, 杜安娜, 刘兆真, 贺春林. DP590镀锌双相钢CMT焊接接头气孔及锌层研究[J]. 机械工程学报, 2023, 59(16): 213-222.

LIU Yan, LIU Ao, ZHANG Linlin, DU Anna, LIU Zhaozhen, HE Chunlin. Study on the Porosity and Zinc Coating of CMT Welded Joints of DP590 Galvanized Dual-phase Steel[J]. Journal of Mechanical Engineering, 2023, 59(16): 213-222.

参考文献

[1] 李光霁,刘新玲.汽车轻量化技术的研究现状综述[J].材料科学与工艺,2020,28(5):47-61.LI Guangji,LIU Xinling. Literature review on research and development of automotive lightweight technology[J].Materials Science and Technology,2020,28(5):47-61.
[2] 王青峡,王光耀,赵奕炳,等.预压缩对DP590汽车钢板疲劳性能影响研究[J].汽车工程,2019,41(12):1430-1434.WANG Qingxia,WANG Guangyao,ZHAO Yibing,et al.Study on the effects of pre-compression on fatigue performance of automotive DP590 steel plate[J].Automotive Engineering,2019,41(12):1430-1434.
[3] 董丽丽.汽车轻量化技术应用分析[J].时代汽车,2021(13):37-38.DONG Lili. Application analysis of automobile lightweight technology[J]. Auto Time,2021(13):37-38.
[4] 冯昌川,丰刚磊,宋庆源.某汽车车身耐腐蚀性试验[J].腐蚀与防护,2015,36(4):366-368,372.FENG Changchuan,FENG Ganglei,SONG Qingyuan.Corrosion resistance experiment of a vehicle body[J].Corrosion&Protection,2015,36(4):366-368,372.
[5] 李宽.车用钢板材料耐腐蚀性研究[J].汽车实用技术,2021,46(5):177-179,189.LI Kuan. Study on corrosion resistance of automobile steel plate[J]. Automobile Applied Technology,2021,46(5):177-179,189.
[6] HÜLYA D, NILAYÇ. Investigation of corrosion resistance of cold metal transfer welded AA7075aluminum alloy galvanized steel couples[J]. MuşAlparslanÜniversitesi Fen Bilimleri Dergisi,2019(1):639-644.
[7] ZHANG Qi, ZHANG Peilei, YU Zhishui, et al.Microstructure and properties of an Al 6061/galvanized plate fabricated by CMT welding[J]. Journal of Wuhan University of Technology(Materials Science), 2020,35(5):937-945.
[8] 向可友,肖革,蓝玉良,等.表面处理技术在汽车轻量化方面的应用[J].腐蚀与防护,2021,42(7):48-52.XIANG Keyou, XIAO Ge, LAN Yuliang, et al.Application of surface treatment technology in automotive lightweight[J]. Corrosion&Protection,2021,42(7):48-52.
[9] 田旭,刘欣,裴锋,等.镀锌钢在模拟大气腐蚀环境的初期腐蚀行为研究[J].应用化工,2020,49(2):406-409.TIAN Xu,LIU Xin,PEI Feng,et al. Study on initial corrosion behavior of galvanized steel in simulated atmospheric corrosion environment[J]. Applied Chemical Industry,2020,49(2):406-409.
[10] 刘欣,裴锋,田旭,等. Cl^-和气体环境对锌包钢腐蚀行为的影响[J].中国科技论文,2019,14(12):1317-1322.LIU Xin,PEI Feng,TIAN Xu,et al. Influence of chliride ion and gas atmosphere on corrosion behavior of zinc-clad steel[J]. China Sciencepaper,2019,14(12):1317-1322.
[11] 陈菲,刘立学,刘靖宝.镀锌C-Mn-Al-Mo系双相高强钢盐雾腐蚀行为研究[J].天津冶金,2019(1):53-56.CHEN Fei,LIU Lixue,LIU Jingbao. Study on salt-spray corrosion behavior of galvanized C-Mn-Al-Mo dual-phase high strength steel[J]. Tianjin Metallurgy,2019(1):53-56.
[12] 李丁,卢广玺,孙玉峰,等. DH590及其镀锌钢板电阻点焊工艺和性能研究[J].热加工工艺,2022,51(13):53-56,60.LI Ding,LU Guangxi,SUN Yufeng,et al. Study on resistance spot welding process and property of DH590and its galvanized steel sheets[J]. Hot Working Technology,2022,51(13):53-56,60.
[13] 杨扬,周信,于霜,等.不同坡口面角度镀锌钢/铝合金激光熔钎焊接头的界面组织和拉伸性能[J].机械工程材料,2021,45(12):55-61.YANG Yang,ZHOU Xin,YU Shuang,et al. Interface microstructure and tensile properties of different-bevel-angle galvanized steel/aluminum alloy joint by laser fusion brazing[J]. Materials for Mechanical Engineering,2021,45(12):55-61.
[14] 肖文波,何银水,袁海涛,等.镀锌钢GMAW焊缝成形特征与焊枪方向同步实时检测[J].焊接学报,2021,42(12):78-82.XIAO Wenbo, HE Yinshui, YUAN Haitao, et al.Synchronous real-time detection of weld bead geometry and the welding torch in galvanized steel GAMW[J].Transactions of the China Welding Institution,2021,42(12):78-82.
[15] GAO Juming,WANG Dan,ZHUANG Dongdong,et al.Effect of laser power on microstructure and mechanical properties of laser heat conduction lap welded joint between AZ31B magnesium alloy and DP780 galvanized steel[J]. Journal of Central South University,2022,29(10):3463-3475.
[16] 方学伟,白浩,姚云飞,等.冷金属过渡电弧增材制造多道搭接工艺研究[J].机械工程学报,2020,56(1):141-147.FANG Xuewei,BAI Hao,YAO Yunfei,et al. Research on multi-channel lap process of cold metal transition arc additive manufacturing[J]. Journal of Mechanical Engineering,2020,56(1):141-147.
[17] YAN Zhaoyang,ZHAO Yun,JIANG Fan,et al. Metal transfer behaviour of CMT-based step-over deposition in fabricating slant features[J]. Journal of Manufacturing Processes,2021(71):147-155.
[18] PICKINA C G,WILLIAMS S W. Characterization of the cold metal transfer(CMT)process and its application for low dilution cladding[J]. Journal of Materials Processing Technology,2011(211):496-502.
[19] 徐连勇,庞红宁,赵雷,等. G115钢CMT+P焊接工艺及组织和性能[J].焊接学报,2020,41(8):1-5,97.XU Lianyong,PANG Hongning,ZHAO Lei,et al.Microstructure and mechanical properties of CMT+P welding process on G115 steel[J]. Transactions of the China Welding Institution,2020,41(8):1-5,97.
[20] 关军印,姜佳成,牟晨飞,等. CMT焊接电流对铝合金/镀锌钢板熔钎焊接头组织及性能的影响[J].材料热处理学报,2019,40(9):156-162.GUAN Junyin,JIANG Jiacheng,MU Chenfei,et al.Effect of CMT welding current on microstructure and properties of aluminum alloy/galvanized steel plate brazed joint[J]. Transactions of Materials and Heat Treatment,2019,40(9):156-162.
[21] 牟晨飞,关军印,刘耀东. CMT焊接电流对铝/镀锌钢板接头组织和力学性能的影响[J].热加工工艺,2020,49(5):35-40.MU Chenfei,GUAN Junyin,LIU Yaodong. Effect of CMT welding current on microstructure and mechanical properties of aluminum/galvanized steel sheet joint[J].Hot Working Technology,2020,49(5):35-40.
[22] 李超豪,华学明,张跃龙,等.镀锌板CMT焊焊缝气孔影响因素及产生机理[J].焊接学报,2019,40(1):94-98,103,165.LI Chaohao,HUA Xueming,ZHANG Yuelong,et al.Study on influence factor and formation mechanism of porosities in CMT welding of galvanized steel sheet[J].Transactions of the China Welding Institution,2019,40(1):94-98,103,165.
[23] 黄磊. DP780镀锌钢激光焊接工艺及气孔形成机理[D].温州:温州大学,2017.HUANG Lei. Laser welding process and porosity formation mechanism of DP780 galvanized steel[D].Wenzhou:Wenzhou University,2017.
[24] 张习羽,王晓帅,叶昕,等. 6061铝合金CMT焊接气孔影响因素研究[J].热加工工艺,2019,48(19):43-47.ZHANG Xiyu,WANG Xiaoshuai,YE Xin,et al. Study on influence factors of porosity of 6061 aluminum alloy by CMT welding[J]. Hot Working Technology,2019,48(19):43-47.
[25] ROBERT T,RENNO V,ANDRES L. Cold metal transfer(CMT)welding of thin sheet metal products[J]. Estonian Journal of Engineering,2012,18(3):243-250.
[26] GE J,WANG K,ZHANG D,et al. Microstructure characteristics and mechanical properties of steel stud to Al alloy by CMT welding brazing process[J]. China Welding,2016,25(1):49-56.
[27] 牟晨飞.铝合金/镀锌钢板CMT焊接界面组织及工艺研究[D].长春:长春工业大学,2019.MOU Chenfei. Study on interfacial microstructure and process of aluminum alloy/galvanized steel welded by CMT[D]. Changchun:Changchun University,2019.
[28] 陆演. DP590先进高强度钢板成形性能及其在汽车B柱中的应用研究[D].重庆:重庆大学,2011.LU Yan. Research on the formability of DP590 advanced high strength sheet and its application to auto B-pillar part[D]. Chongqing:Chongqing University,2011.
[29] 徐杰,李彩霞. DP590钢的力学性能及在车身结构件的应用[J].机械设计与制造,2016(4):242-244,248.XU Jie,LI Caixia. Research on the mechanical properties of high strength steel DP590 and application in car body[J]. Machinery Design&Manufacture,2016(4):242-244,248.