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Article

Application of Cold Wire Gas Metal Arc Welding for Narrow Gap Welding (NGW) of High Strength Low Alloy Steel

1
Centre for Advanced Materials Joining (CAMJ), University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G5, Canada
2
Metallic Materials Characterization Laboratory (LCAM) Federal University of Pará (UFPA), Rua Augusto Corrêa, 1—Guamá, Belém, PA 66075-110, Brazil
3
Liburdi Automation Inc., Liburdi GAPCO, 400 ON-6, Dundas, ON L9H 7K4, Canada
*
Author to whom correspondence should be addressed.
Materials 2019, 12(3), 335; https://doi.org/10.3390/ma12030335
Received: 21 December 2018 / Revised: 17 January 2019 / Accepted: 18 January 2019 / Published: 22 January 2019
(This article belongs to the Special Issue Welding, Joining and Coating of Metallic Materials)
Narrow gap welding is a prevalent technique used to decrease the volume of molten metal and heat required to fill a joint. Consequently, deleterious effects such as distortion and residual stresses may be reduced. One of the fields where narrow groove welding is most employed is pipeline welding where misalignment, productivity and mechanical properties are critical to a successful final assemblage of pipes. This work reports the feasibility of joining pipe sections with 4 mm-wide narrow gaps machined from API X80 linepipe using cold wire gas metal arc welding. Joints were manufactured using the standard gas metal arc welding and the cold wire gas metal arc welding processes, where high speed imaging, and voltage and current monitoring were used to study the arc dynamic features. Standard metallographic procedures were used to study sidewall penetration, and the evolution of the heat affected zone during welding. It was found that cold wire injection stabilizes the arc wandering, decreasing sidewall penetration while almost doubling deposition. However, this also decreases penetration, and incomplete penetration was found in the cold wire specimens as a drawback. However, adjusting the groove geometry or changing the welding parameters would resolve this penetration issue. View Full-Text
Keywords: GMAW; CW-GMAW; Narrow gap welding; sidewall penetration; high strength steel; X80 GMAW; CW-GMAW; Narrow gap welding; sidewall penetration; high strength steel; X80
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MDPI and ACS Style

Ribeiro, R.A.; Assunção, P.D.C.; Dos Santos, E.B.F.; Filho, A.A.C.; Braga, E.M.; Gerlich, A.P. Application of Cold Wire Gas Metal Arc Welding for Narrow Gap Welding (NGW) of High Strength Low Alloy Steel. Materials 2019, 12, 335. https://doi.org/10.3390/ma12030335

AMA Style

Ribeiro RA, Assunção PDC, Dos Santos EBF, Filho AAC, Braga EM, Gerlich AP. Application of Cold Wire Gas Metal Arc Welding for Narrow Gap Welding (NGW) of High Strength Low Alloy Steel. Materials. 2019; 12(3):335. https://doi.org/10.3390/ma12030335

Chicago/Turabian Style

Ribeiro, Rafael A., Paulo D.C. Assunção, Emanuel B.F. Dos Santos, Ademir A.C. Filho, Eduardo M. Braga, and Adrian P. Gerlich. 2019. "Application of Cold Wire Gas Metal Arc Welding for Narrow Gap Welding (NGW) of High Strength Low Alloy Steel" Materials 12, no. 3: 335. https://doi.org/10.3390/ma12030335

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