Investigation on dynamic behaviors of bubble evolution in underwater wet flux-cored arc welding

Investigation on dynamic behaviors of bubble evolution in underwater wet flux-cored arc welding
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水下湿式药芯焊丝电弧焊气泡演化动态行为研究

DOI:
10.1016/j.jmapro.2017.06.003
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发表时间:
2017-08
影响因子:
6.2
通讯作者:
Xu Pengwei
Xu Pengwei
中科院分区:
工程技术2区
文献类型:
--
作者:
Feng Jicai;Wang Jianfeng;Sun Qingjie;Zhao Huanyao;Wu Laijun;Xu Pengwei

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水下湿法药芯焊丝焊接过程中气泡的演化行为对焊接过程的稳定性和焊接接头质量有重要影响。本研究以高速摄影法为基础,探讨气泡演化行为之视觉感测,以完成湿式焊接过程之研究。研究了预置焊接工艺参数对气泡演化行为的影响。确定了湿焊过程中4种典型的气泡演化模式及其对应的焊接电信息,并结合电弧特性对气泡行为进行了沿着描述。结果表明,水下湿法焊接气泡演化过程是不稳定的、复杂的,需要通过调整焊接工艺参数进行控制,以获得更稳定的保护效果。在一定的焊接工艺参数下,变异系数与焊缝成形和气泡演化模式之间存在匹配关系。对于水下湿式FCAW,在不熄灭电弧的情况下,具有较低的浮动频率和较大的气泡最大直径,可以获得稳定的焊接过程。
Bubble evolution behavior has a significant effect on the process stability and weld joint quality in underwater wet flux-cored arc welding (FCAW). In this study the visual sensing of bubble evolution behaviors based on high-speed camera method have been explored in attempt to accomplish the study of the wet welding process. The effects of preset welding parameters on the bubble evolution behaviors are investigated in detail. Four typical bubble evolution modes during the wet welding process and their corresponding welding electric information are determined to describe the bubble behaviors along with arc characteristics. Results indicated that the bubble evolution of underwater wet welding is unstable and complicated, necessitating control by adjusting the welding parameters to obtain a more stable protective effect. And there is a matching relationship between the coefficient of variation, weld appearance and bubble evolution mode for certain welding parameters. For underwater wet FCAW, a stable welding process can be acquired with a lower floating frequency and a larger maximum diameter of the bubble without arc extinguishing.
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