Investigation of Arc Bubble Affecting the Arc Stability and Improvement of Weld Appearances Using Bubble Constraint Device in Underwater Wet Welding

Hao Chen; Ning Guo; Ji Cai Feng; Guo Dong Wang

doi:10.4028/www.scientific.net/MSF.972.215

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HomeMaterials Science ForumMaterials Science Forum Vol. 972Investigation of Arc Bubble Affecting the Arc...

Investigation of Arc Bubble Affecting the Arc Stability and Improvement of Weld Appearances Using Bubble Constraint Device in Underwater Wet Welding

Abstract:

The generating, floating and collapsing of arc bubble is a special phenomenon in underwater flux-cored wet welding. The configuration changing process of bubble will change the stress on droplet and influence the droplet transfer process. In this study, the shape changing of bubble is captured in graphic and the real-time electric signal data is obtained. The impact of bubble floating and collapsing results in the globular repelled transfer mode, which also reduces the arc stability. A self-designed gas-shield cover is used as a bubble constraint device to improve the welding process stability and weld appearances by limiting the free floating and expansion of arc bubble. The relationships between the cover diameter and the characteristics of weld appearance are studied.

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Periodical:

Materials Science Forum (Volume 972)

Pages:

215-221

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.972.215

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Online since:

October 2019

Authors:

Hao Chen*, Ning Guo, Ji Cai Feng, Guo Dong Wang

Keywords:

Arc Bubble Behaviors, In Situ X-Ray Imaging Method, Metal Transfer, Underwater Wet Welding, Weld Appearance

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