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ZHANG Dong1,2, CHEN Maoai1, WU Chuansong1. Optimization of waveform parameters for high speed CMT welding of steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(1): 118-122. DOI: 10.12073/j.hjxb.2018390027
Citation: ZHANG Dong1,2, CHEN Maoai1, WU Chuansong1. Optimization of waveform parameters for high speed CMT welding of steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(1): 118-122. DOI: 10.12073/j.hjxb.2018390027
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Optimization of waveform parameters for high speed CMT welding of steel

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  • Received Date: July 20, 2016
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  • A series of high speed CMT welding tests were conducted on Q235 steel at a wire feed speed of 5 m/min and a welding speed of 1.8 m/min. The effect of waveform parameters on welding process, weld bead appearance was researched by means of orthogonal test. The causes for unstable welding process at high welding speed were analyzed. The results showed that the wing order: peak wire feed speed, boost current duration (tp) and boost current (Ip). With unsuitable welding parameters (including expert welding parameters in CMT power source), periodic “wire adhesion” phenomenon which led to uneven weld bead appearance and severely undercut occurred frequently in high speed CMT welding. The “wire adhesion” phenomenon was caused by high peak wire feed speed, droplet drag and low temperature of thin liquid metal layer in front of the weld pool. Wire adhesion phenomenon was eliminated and sound weld bead appearance was obtained by properly matching the above three waveform parameters.
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  • 石常亮, 何 鹏, 冯吉才, 等. 铝/镀锌钢板CMT熔钎焊界面区组织与接头性[J]. 焊接学报, 2006, 27(12): 61-64.Shi Changliang, He Peng, Feng Jicai,et al. Interface microstructure and mechanical property of CMT welding-brazed joint between aluminum and galvanized steel sheet[J]. Transactions of the China Welding Institution, 2006, 27(12): 61-64.[2] Mezrag B, Deschaux-Beaume F, Benachour M. Control of mass and heat transfer for steel/aluminium joining using cold metal transfer process[J]. Science and Technology of Welding and Joining, 2015, 20(3): 189-198.[3] 汪殿龙, 张志洋, 梁志敏, 等. 交流CMT动态电弧特征及熔滴过渡行为分析[J]. 焊接学报, 2014, 35(3): 6-10.Wang Dianlong, Zhang Zhiyang, Liang Zhimin,et al. Analysis of dynamic arc characteristics and melt transfer behavior of AC CMT[J]. Transactions of the China Welding Institution, 2014, 35(3): 6-10.[4] 杨修荣. 超薄板MIG/MAG焊——CMT冷金属过渡技术[J]. 电焊机, 2006, 36(6): 5-7.Yang Xiurong. CMT cold metal transfer process[J]. Electric Welding Machine, 2006, 36(6): 5-7.[5] 陈茂爱, 蒋元宁, 武传松. 受控短路过渡CO2焊焊接电流波形参数优化[J]. 焊接学报, 2014, 35(7): 79-82.Chen Maoai, Jiang Yuanning, Wu Chuansong. Optimization of welding current waveform parameters in controlled short circuiting transfer GMAW[J]. Transactions of the China Welding Institution, 2014, 35(7): 79-82.[6] Meng X, Qin G, Zhang Y,et al. High speed TIG-MAG hybrid arc welding of mild steel plate[J]. Journal of Materials Processing Technology, 2014, 214(11): 2417-2424.
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