Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on Back Bead Formation in Inclined-up Position of Flasma An Orbital Welding

플라즈마 아크 오비탈 용접의 경사상진자세에서 이면비드 형성에 관한 연구

  • Kim, Hyo-Won (Dept. of Materials Processing Eng., Graduate School, Pukyong National Univ.) ;
  • Cho, Sang-Myung (Div. of Advanced Materials Sci. and Eng., Dept. of Materials Processing Eng., Pukyong National Univ.)
  • 김효원 (부경대학교 대학원 소재프로세스공학과) ;
  • 조상명 (부경대학교 신소재공학부 소재프로세스공학)
  • Published : 2009.02.28
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Abstract

In the circumferential welding of pipe, welding phenomenon changes with the position of pipe. Especially in the overhead position, back bead of vertical-up position would be sunk. To investigate the size of back bead and keyhole with the change of the flow rate of pilot and shield gas at each position, bead-on plate welds were conducted on 6mm thickness SS400 with inclined-up position. When the rest of welding conditions remained constant, the width of back bead was increased as the flow rate of pilot gas was increased. And back bead tended to convex as the flow rate of shield gas was increased.

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References

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