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| Influence of Environmental Pressure on GMAW Process and The Weld Bead Appearance |
| WU Jinming1,XUE Long1,HUANG Jiqiang1，LIU jian1,LI Lan2,XU Lei3 |
| (1. Beijing Major Laboratory of OptoMechatronic Equipment Technology, Beijing Institute of Petro-Chemical Technology, Beijing 102617, China；2. School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China； 3. School of Mechanical and Electrical Engineering, Beijing University of Technology, Beijing 100124， China) |
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Abstract Abstract： Underwater hyperbaric dry gas metal arc welding (GMAW) welding technology is one of the key technologies for the maintenance of underwater equipment, such as shipping, ocean platform, seabed pipeline. To get high quality and high efficiency underwater welding technology parameters, the effect of hyperbaric ambient on GMAW is of important practical significance. The characteristics of the weld appearance and the GMAW process were studied at ambient pressure from 0.1 MPa to 1.0 MPa by using a highspeed camera and a Hannover analyser. The causes of weld spatter and the characteristics of weld appearance were analyzed. The experiment shows that as the number of the spatters increase, the weld joint becomes narrower and worsens gradually as the ambient pressure increases.
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Received: 15 May 2014
Published: 30 March 2015
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