激光与光电子学进展, 2018, 55 (2): 021408, 网络出版: 2018-09-10   

激光功率对激光-MAG复合焊熔滴过渡行为的影响 下载: 1012次

Effects of Laser Power on Droplet Transfer Behaviour in Laser-MAG Hybrid Welding
作者单位
西南交通大学材料科学与工程学院, 四川 成都 610031
摘要
通过SUS301L不锈钢材料的激光-MAG(熔化极活性气体保护电弧焊)复合焊试验,研究了激光功率对不同过渡模式下熔滴及焊缝尺寸的影响。结果表明,随着激光功率的增大,金属蒸气的反作用力增大,电磁力方向发生改变并影响熔滴的过渡。在短路过渡模式下,当激光功率超过2000 W后,熔滴过渡困难,熔滴与熔池的接触点偏向激光侧。在射滴过渡和射流过渡模式下,当激光功率达到3000 W后,熔滴过渡及焊接电压出现不稳定现象。在不同过渡模式下,焊缝的熔深、熔宽均随激光功率的增大而增大;当激光功率达到2000 W后,熔深与激光功率呈线性递增关系,而熔宽基本保持不变。
Abstract
The effects of laser power on droplets and weld sizes under different transfer modes are investigated by using the experiment of laser-MAG (metal active gas arc welding) hybrid welding of SUS301L stainless steels. The results indicate that, with the increase of laser power, the metal vapor recoil force increases, the resultant electromagnetic force direction changes, and the droplet transfer is affected. In the short-circuiting mode, the droplets transfer difficultly and are deviated from the wire to laser spot when laser power exceeds 2000 W. In the globule and spray transfer modes, there exist an unstable phenomena in the droplet transfer and welding voltage when laser power is beyond 3000 W. In different transfer modes, the weld penetration and width increase with laser power. After the laser power approaches 2000 W, the weld penetration changes linearly with laser power, while the weld width remains constant.

何双, 陈辉, 陈勇, 徐力栋, 车小莉. 激光功率对激光-MAG复合焊熔滴过渡行为的影响[J]. 激光与光电子学进展, 2018, 55(2): 021408. Shuang He, Hui Chen, Yong Chen, Lidong Xu, Xiaoli Che. Effects of Laser Power on Droplet Transfer Behaviour in Laser-MAG Hybrid Welding[J]. Laser & Optoelectronics Progress, 2018, 55(2): 021408.

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