International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Development of method to remove weld scallop and ceramic backing material of wedge type and its application

  • Kang, Sung-Koo (Research Institute of Technology, STX Offshore & Shipbuilding) ;
  • Yang, Jong-Soo (Research Institute of Technology, STX Offshore & Shipbuilding) ;
  • Kim, Ho-Kyung (Research Institute of Technology, STX Offshore & Shipbuilding)
  • Published : 2015.03.31
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Abstract

The weld scallop has been used for joining T-bars. There are a lot of weld scallops in shipbuilding. It is difficult to perform scallop welding due to the inconvenient welding position. This results in many problems such as porosity, slag inclusion, etc. In this study, a new method is devised to remove weld scallops by incorporating a Ceramic Backing Material (CBM). The weld scallop is removed by an elongation of the v groove. In order to insert a CBM into the groove without a weld scallop, a wedge-shaped CBM is developed. The top side of the developed CBM is similar to the shape of a general back bead. The bottom surface has a saw-toothed shape for cutting at a suitable length. This can be attached to the root side of a face plate using adhesive tape, just like a general CBM. Welding experiments in normal and abnormal conditions are carried out and the possibility of burn-through is examined. This CBM's applicability to shipbuilding is verified.

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References

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Cited by

  1. Study on fatigue experiment for transverse butt welds under 2G and 3G weld positions vol.7, pp.5, 2015, https://doi.org/10.1515/ijnaoe-2015-0059