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Effects of He content in shielding gases on high-efficient hybrid laser arc welding with C-276 filler metal
Journal of Materials Processing Technology ( IF 6.3 ) Pub Date : 2021-09-15 , DOI: 10.1016/j.jmatprotec.2021.117367
Yongan Zhu 1 , Yan Cai 1 , Min Wang 1
Affiliation  

High-efficient welding technology with rotating arc assisted by laser under shielding gases with different He content was investigated for the application of 9% Ni steel in LNG storage. High-speed image and electrical signal acquisition were adopted to investigate arc stability and metal transfer behavior during hybrid laser arc welding. The results indicated that with increasing content of He, the weld formation became better first and then worse. Ar+30 %He improved the formation of welding seam. The He content had a significant influence on the electric signal waveforms. With the addition of 30 %He, the waveforms had the minimal fluctuation. It was rotating spray transfer with pure Ar, Ar+30 %He and Ar+50 %He. The difference was that with the He content increase, transfer mode shifted from unstable rotating spray transfer to stable rotating spray transfer, to irregular rotating spray transfer. With pure He, it was large droplet transfer, resulting in the formation of large spatters. The research of rotating spray transfer trajectory showed that the rotation velocity was relatively constant and one rotation time was 3.19 ms in one pulse period under Ar+30 %He. The trajectory equation was obtained for describing the rotating spray transfer. This indicated that the addition of 30 %He improved the coupling effect of laser and arc, enhanced the matching degree between rotating spray transfer and arc pulse period. It was meaningful to understand the effects of shielding gases on 9% Ni steel hybrid laser arc welding, providing theoretical basis for LNG storage efficient and reliable manufacturing.



中文翻译:

保护气体中He含量对C-276填充金属高效混合激光电弧焊的影响

针对9%Ni钢在LNG储存中的应用,研究了不同He含量保护气体下激光辅助旋转电弧高效焊接技术。采用高速图像和电信号采集来研究复合激光电弧焊过程中的电弧稳定性和金属转移行为。结果表明,随着He含量的增加,焊缝成形先好后坏。Ar+30 %He 改善了焊缝的形成。He含量对电信号波形有显着影响。添加 30%He 后,波形的波动最小。使用纯 Ar、Ar+30%He 和 Ar+50%He 进行旋转喷雾转移。不同的是随着He含量的增加,传递模式从不稳定的旋转喷雾传递转变为稳定的旋转喷雾传递,再到不规则的旋转喷雾传递。对于纯He,是大液滴转移,导致形成大飞溅。旋转喷雾转移轨迹研究表明,在Ar+30%He条件下,旋转速度相对恒定,一脉冲周期内旋转一圈时间为3.19 ms。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。以不规则的旋转喷雾转移。对于纯He,是大液滴转移,导致形成大飞溅。旋转喷雾转移轨迹研究表明,在Ar+30%He条件下,旋转速度相对恒定,一脉冲周期内旋转一圈时间为3.19 ms。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。以不规则的旋转喷雾转移。对于纯He,是大液滴转移,导致形成大飞溅。旋转喷雾转移轨迹研究表明,在Ar+30%He条件下,旋转速度相对恒定,一脉冲周期内旋转一圈时间为3.19 ms。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。导致形成大的飞溅物。旋转喷雾转移轨迹研究表明,在Ar+30%He条件下,旋转速度相对恒定,一脉冲周期内旋转一圈时间为3.19 ms。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。导致形成大的飞溅物。旋转喷雾转移轨迹研究表明,在Ar+30%He条件下,旋转速度相对恒定,一脉冲周期内旋转一圈时间为3.19 ms。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。获得了描述旋转喷雾转移的轨迹方程。这说明30%He的加入提高了激光与电弧的耦合效果,增强了旋转喷雾传递与电弧脉冲周期的匹配度。了解保护气体对9%Ni钢混合激光电弧焊的影响具有重要意义,为LNG储存高效可靠制造提供理论依据。

更新日期:2021-09-17
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