溶接学会論文集
Print ISSN : 0288-4771
Welding Letters
Visualization of Submerged Arc Welding Phenomena by X-ray Observation and Direct Observation
Hisaya KomenYohei AbeTakahiro FujimotoMasaya ShigetaMitsuyoshi NakataniManabu Tanaka
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2018 年 36 巻 4 号 p. 9WL-12WL

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Behaviors of flux, slag and molten metal during a submerged arc welding with a large current were observed by the X-ray observation system including a high speed video camera. Moreover, the direct observation using a high speed video camera was also carried out to observe the arc phenomena, which could not be observed by the X-ray observation. From X-ray observation results, the weld part during a submerged arc welding was classified broadly into 4 regions. Then, it was clarified that a slag was pushed backward in a welding direction when it approached to a wire which an arc plasma existed around. As a result of this series of slag behaviors, the preformed cavity was filled by the slag at the backward of the heat source. In addition, from a direct observation, it was made clear that there were bluish white plasma at beneath a molten metal droplet and orange emitting region around the plasma.

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© 2018 社団法人 溶接学会
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