Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

An Experimental Study on the Arc Stability Improvement of Underwater Wet Welding with Flux Ingredients

피복성분에 의한 수중용접봉의 아크 안정성 개선에 관한 실험연구

  • 김복인 (부경대학교 대학원 기계공학과) ;
  • 노창석 (부경대학교 대학원 기계공학과) ;
  • 정교헌 (부경대학교 대학원 기계공학과) ;
  • 김민남 (부경대학교 기계공학과)
  • Published : 2001.11.01
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Abstract

Underwater wet bead-on-plate welds were experimentally performed on 11mm thick SS400 steel plate as base metal by using six different types of flux coated electrodes of 3.2mm diameter. Two kinds of different flux coated wet arc electrodes (UW-1, UW-2) were individually designed flux materials, three kinds of the electrodes (E4301, E4311, E4313) were terrestrial electrodes and the another one (TN20) was an imported underwater wet welding electrode. As results, the individually designed flux coated underwater electrode, UW-2 and TN20 had a good starting and the excellent arc stability compared with other electrodes. No significant difference of bead appearance could be detected, but the slag detachability of TN20 electrodes was relatively undesirable. By rapid cooling rate, the hardness value and the portion of martensite of HAZ were increased, but it was considerably maintain stable for TN20 and UW-2 electrodes. The individually designed flux coated electrode, UW-2 could be used in practice for underwater bead welds.

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References

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