Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Effects of Fluorides in the Flux Cored Wire on the Oxygen Content of Weld Metal

플럭스 코어드 와이어의 불화물 종류에 따른 용접금속 산소량의 변화

  • Cha, Joo-hyeon (Department of Materials System Engineering, Pukyong National University) ;
  • Bang, Kook-soo (Department of Materials System Engineering, Pukyong National University)
  • 차주현 (부경대학교 신소재시스템공학과) ;
  • 방국수 (부경대학교 신소재시스템공학과)
  • Received : 2019.06.13
  • Accepted : 2019.11.23
  • Published : 2019.12.30
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Abstract

Various fluorides, i.e., CaF2, Na3AlF6, K2SiF6, MnF3, MgF2, were added to the flux cored wire, and their effects on the oxygen content of the weld metal were investigated. The investigation showed that the oxygen content of weld metal was not influenced by the type of metallic elements in the fluoride; rather, it was influenced by the stability of the arc during welding. While the wire containing MgF2 showed the most stable arc and the least amount of oxygen in the weld metal, the wire containing MnF3 showed the least stable arc and the greatest amount of oxygen. Since the deoxidation of the weld metal was not affected by the deoxidation elements, such as Ca and Mg, it was possible to predict the oxygen content of the weld metal by the equilibrium Si-Mn deoxidation thermodynamic model.

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References

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