Underwater wet welding consumables for offshore applications
- Colorado School of Mines, Golden, CO (United States). Center for Welding and Joining Research
- Amoco Corp. Research, Naperville, IL (United States)
The use of underwater wet welding for offshore repairs has been limited mainly because of porosity in the resulting welds. With appropriate consumable design, however, it is possible to enhance weld metal toughness through microstructural refinement and to reduce porosity. New titanium and boron based consumables have been developed with which high toughness acicular ferrite can be produced in underwater wet welds. Titanium, by means of oxide formation, promoted an increase in weld metal acicular ferrite, while boron additions decreased the amount of grain boundary ferrite, further improving the microstructure. Porosity reduction was possible through the addition of calcium carbonate at approximately 13 wt. % in the coating. However, weld metal decarburization also resulted with the addition.
- OSTI ID:
- 33193
- Report Number(s):
- CONF-930641--; ISBN 0-7918-0785-1
- Country of Publication:
- United States
- Language:
- English
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