The National Shipbuilding Research Program 1985 Ship Production Symposium Volume 2 Paper No. 2: Evaluation of the Usability and Benefits of Twist Wire GMAW and FCAW Narrow Gap Welding
PUGET SOUND NAVAL SHIPYARD BREMERTON WA
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Puget Sound Naval Shipyard is evaluating and developing the twisted wire narrow gap joints and reduced bevel weld joints for the shipbuilding industry. Test and evaluation work is being accomplished with twisted solid wire and twisted flux cored arc weld on carbon steel, low alloy steels ASTM-302B and quenched and temper steels HY-8O. Weld joint design tolerances, welding parameters tracking systems and weld joint irregularities have been evaluated with both twisted FCAW and solid welding electrodes. All test welds have been accomplished on two and three inch thick base metals. The following elements of the electrode quality were found to be critical for depositing sound metal uniformity of the twist tightness of the twist smoothness of the wire amounts of residual stress prevention of looping and the amount of helix.
- Fabrication Metallurgy
- Couplers, Fasteners and Joints