Comprehensive analysis of spatter loss in wet FCAW considering interactions of bubbles, droplets and arc - Part 2: Visualization & mechanisms
Comprehensive analysis of spatter loss in wet FCAW considering interactions of bubbles, droplets and arc - Part 2: Visualization & mechanisms
复制标题
考虑气泡、熔滴和电弧相互作用的湿式 FCAW 飞溅损失综合分析 - 第 2 部分：可视化
DOI：
10.1016/j.jmapro.2019.03.011
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发表时间：
2019
影响因子：
6.2
通讯作者：
Wu Chuansong
中科院分区：
文献类型：
--
作者：
Jia Chuanbao;Zhang Yong;Wu Junfei;Xing Changjian;Zhao Bo;Wu Chuansong
前期研究对水下湿法FCAW严重的飞溅损失进行了测量、分析和改进。然而，其根本机制仍不清楚。通过直观地感知熔滴、气泡、焊接电弧和周围水之间的复杂相互作用，全面研究了飞溅的产生过程和机制。观察到水下焊接中两种典型的飞溅物，即爆炸性飞溅物和排斥性飞溅物。气泡演化过程、电弧行为（燃烧、熄灭和重燃）以及熔滴过渡共同导致了飞溅的产生。与液滴过渡过程相关，当高温液滴的过渡轨迹受到气泡颈缩位置和时间的显着影响时，液态金属可能会变成飞溅。
Severe spatter loss in underwater wet FCAW was measured, analyzed and improved in the previous research. However, the underlying mechanisms are still not clear. Via visually sensing the complex interactions between droplets, bubbles, welding arc and surrounding water, the spatter generation process and mechanisms were comprehensively investigated. Two typical spatters in underwater welding were observed, i.e. explosive and repulsive spatters. The bubble evolution process, arc behaviours (burning, extinguishing and reigniting), and droplet transfer jointly caused the generation of spatters. Related to the droplet transfer process, the liquid metal might change into spatters when its transfer trajectory of high-temperature liquid droplet was significantly affected by the bubble necking location and timing.