Ultranarrow Gap Welding with Constrained Arc by Flux Strips

Abstract:

Ultranarrow gap welding with the gap of less than 5mm was executed successfully. In order to prevent the arc from being attracted by sidewall and going up along the sidewall, the flux strips consisting of the specified aggregates are placed onto the sidewalls to constrain the arc. This technique was tested on the welding experiment of pipeline steel with thickness of 30mm. The involved welding parameters were obtained. The width of gap is 4mm, the welding voltage 20~24V, and the heat input 0.6 KJ/mm. The cross sections of weld profile were analyzed. The width of heat affected zone is relatively narrow and about 1.3mm, and the weld hardness is much higher than that of HAZ and base metal.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 2814-2818
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.2814
• Online since: February 2012
• Authors: Liang Zhu, Yan Li Pan, Yuan Bo Li
• Keywords: Arc Constrained by Flux Strips, Ultranarrow Gap Welding, Welding Parameters

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