The Nature of Metallurgical Reactions in Underwater Welding,
COLORADO SCHOOL OF MINES GOLDEN CENTER FOR WELDING RESEARCH
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The pyrometallurgical reactions are characterized as a function of depth for underwater wet welding. The influence of weld metal compositional variations with depth on weld metal microstructure are described. Metallurgical suggestions as to compositional modifications to underwater wet welding electrodes to achieve the desired microstructure and properties are given. Underwater welding has been recognized as a difficult and potentially cost saving engineering task that becomes more important with the maintenance of existing marine structures. Specifications for underwater welding which describe the mechanical requirements that load bearing weld deposits must meet are available. Christensen et. al. have introduced basic concepts for underwater weld metal chemistry and metallurgy. Their research was primarily on the influence of pressure on hyperbaric shielded metal arc weld metal compositions. Christensens work did suggest that similar weld metal compositional variations should occur in wet underwater welding. Madator reported on the influences of parameters on the welding process and on the metallurgical reactions.
- Fabrication Metallurgy