The use of underwater wet welding for offshore repairs has been limited mainly because of porosity and low toughness in the resulting welds. With appropriate consumable design, however, it is possible to reduce porosity and to enhance weld metal toughness through microstructural refinement. New titanium and boron-based consumables have been developed with which high toughness acicular ferrite (AF) can be produced in underwater wet welds. Titanium, by means of oxide formation, promoted an increase in the amount of acicular ferrite in the weld metal, while boron additions decreased the amount of grain boundary ferrite (GBF), further improving the microstructure. Porosity reduction was possible through the addition of calcium carbonate at approximately 13 wt percent in the electrode coating. However, weld metal decarburization also resulted with the addition of carbonate.
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August 1995
Research Papers
Designing Shielded Metal Arc Consumables for Underwater Wet Welding in Offshore Applications
A. Sanchez-Osio,
A. Sanchez-Osio
Center for Welding and Joining Research, Colorado School of Mines, Golden, CO 80401
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S. Liu,
S. Liu
Center for Welding and Joining Research, Colorado School of Mines, Golden, CO 80401
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D. L. Olson,
D. L. Olson
Center for Welding and Joining Research, Colorado School of Mines, Golden, CO 80401
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S. Ibarra
S. Ibarra
Amoco Corporation Research, Naperville, IL
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A. Sanchez-Osio
Center for Welding and Joining Research, Colorado School of Mines, Golden, CO 80401
S. Liu
Center for Welding and Joining Research, Colorado School of Mines, Golden, CO 80401
D. L. Olson
Center for Welding and Joining Research, Colorado School of Mines, Golden, CO 80401
S. Ibarra
Amoco Corporation Research, Naperville, IL
J. Offshore Mech. Arct. Eng. Aug 1995, 117(3): 212-220 (9 pages)
Published Online: August 1, 1995
Article history
Revised:
March 7, 1995
Online:
December 17, 2007
Citation
Sanchez-Osio, A., Liu, S., Olson, D. L., and Ibarra, S. (August 1, 1995). "Designing Shielded Metal Arc Consumables for Underwater Wet Welding in Offshore Applications." ASME. J. Offshore Mech. Arct. Eng. August 1995; 117(3): 212–220. https://doi.org/10.1115/1.2827092
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