Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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The Study for Improving the Weldability of Pure Titanium Sheet by Using Fiber Laser - The Effect of Shielding Gas Nozzle Variable -

파이버 레이저를 이용한 순 티타늄 박판의 용접특성 향상을 위한 연구 - 실드가스 노즐변수의 영향 -

  • Kim, Jong-Do (Division of Marine Engineering, Korea Maritime and Ocean Univ.) ;
  • Kim, Ji-Sung (Graduate School, Korea Maritime and Ocean Univ.)
  • 김종도 (한국해양대 해사대학 기관공학부) ;
  • 김지성 (한국해양대 대학원 기관공학과)
  • Received : 2016.09.08
  • Accepted : 2016.09.28
  • Published : 2016.10.31
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Abstract

This study was performed bead welding of pure titanium by using fiber laser. Since titanium is very sensitive to oxidation and nitriding during welding, it is important to compose the shielding equipment compared with different material. Thus side and coaxial shield nozzle, rail and chamber type shielding equipment are widely used to protect effectively the weld during welding. Experiments were performed by changing nozzle angle and distance using side and coaxial shield nozzle. The bead colors of gold, brown, blue, purple and yellowish white were obtained by changing variables of shield nozzle, and then its weldability was investigated. As experiment result, sound and not brominated beads were formed when side nozzle angle and distance were respectively $45^{\circ}$ and 10 mm.

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