Effect of Be Mixing Ratio on the Characteristics of TIG Welding with High Current and High Speed

대전류 고속 TIG 용접 특성에 미치는 He 혼합비의 영향

  • Oh Dong-Soo (Dept. of Plant Facility Automation, Changwon Polytechnic College) ;
  • Kim Yeong-Sik (Major of Machine Design & Manufacturing Automation Eng., Div. of Mechanical Engineering, Pukyong National University) ;
  • Cho Sang-Myung (Course of Materials Processing Eng., Div. of Materials Science & Engineering, Pukyong National University)
  • 오동수 (창원기능대학 플랜트설비자동화과) ;
  • 김영식 (부경대학교 기계공학부 기계설계, 생산자동화공학) ;
  • 조상명 (부경대학교 신소재공학부 소재프로세스공학)
  • Published : 2005.06.01


Tungsten Inert Gas(TIG) welding is today one of the most popular arc welding process because of its high quality welds and low equipment costs. Even if welding productivity increases with welding speed and current, this strategy is limited by the appearance of defects such as undercut and humping bead due to the depressed molten metal. The purpose of this study investigates the effect of He mixing ratio on the characteristics with high current and speed in TIG welding. The conclusions obtained permit to explain the arc start characteristics quantitatively and the maximum welding speed on stable bead formation with He mixing ratio for high current and speed TIG welding observed in experiments. Also through the relation of the maximum arc pressure and surface depression depth at high current and speed TIG welding, it made clear the mechanism of unstable bead formation.


  1. AWS : Welding Handbook. Vol. 2. 8th Ed (1991). 74-75
  2. Yutaka Kimura. Susumu Harada. Toyoyuki Satoh, Keiki Ariga, and Katsuhiko Yasuda : Application of He-DCEN.TIG Orbital Welding to Aluminium Piping. Journal of JWS. 15-1(1997). 45-50(in Japanese)
  3. G. R. Cannell and R. P. Ruth : Closing Spent Nuclear Fuel Canisters with GTAW, Welding Journal, 82-12 (2003), 28-32
  4. Sang-Myung Cho : A Study on the Bead Stability in High Speed TIG Welding, KOSME, 18-3(1994), 68-77 (in Korean)
  5. ランカスタ-編著 : 溶接ア-ク物理, 社團法人 溶接協會溶接ア-ク物理硏究委員會(1990) (in Japanese)
  6. 日本溶接協會編 : 新版 ティグ溶接法の基礎と實際, 産報出版 (1992)(in Japanese)
  7. M.L. Lin and T.W. Eagar : Pressure Produced by Gas Tungsten Arcs, Metallurgical Transactions B, 17B(1986), 601-609 https://doi.org/10.1007/BF02670227
  8. K. Hiraoka, A. Okada and M. Inagaki : Effect of Electrode Geometry on Maximum Arc Pressure in Gas Tungsten Arc Welding, Journal of JWS, 3-2 (1985), 246-252(in Japanese)
  9. K. Hiraoka, A. Okada and M. Inagaki : Effect of He Gas on Arc Characteristic in Gas Tungsten Arc Welding, Journal of JWS, 3-2(1985), 241-246(in Japanese)
  10. H. Nishikawa, K. Yoshida, T. Maruyama, T. Ohji, Y. Suita, and K. Masubuchi : Gas Hollow Tungsten Arc Characteristics Under Simulated Space Environment, Science and Technology of Welding and Joining, 6-1(2001), 12-16 https://doi.org/10.1179/136217101101538488
  11. Dong-Soc Oh, Yeong-Sik Kim, and Sang-Myung Cho : The characteristics of Arc Pressure Distribution by Shield Gas Mixing Ratio in TIG Welding, Journal of KWS, 23-1(2005), 41-47(in Korean)
  12. Dong-Soc Oh. Yeong-Sik Kim, and Sang-Myung Cho : Derivation of Current Density Distribution by Arc Pressure Measurement GTA Welding, Science and Technology and Welding and Joining, accepted for publication 2005(reference paper No. STWJ 511) https://doi.org/10.1179/174329305X44116
  13. M.L. Lin and T.W. Eagar: Influence of Arc Pressure on Weld Pool Geometry, Welding Journal, 64-6 (1985), 163s-169s
  14. P.F. Mendez and T.W. Eagar : Estimation of the Characteristic Properties of Weld Pool during High Productivity Arc Welding, Mahematical Modelding of Weld Phnnomena 5, Institute of Materials, London, U.K., 2001. 67-94
  15. P.F. Mendez and T.W. Eagar : Penetration and Defect Formation in High-Current Arc Welding, Welding Journal, 82-10(2003), 296s-306s
  16. C.S. Wu, P.C. Zhao, and Y.M. Zhang, Numerical Simulation of Transient 3-D Surface Deformation of a Completely Penetration GTA Weld, Welding Journal, 83-12(2004), 330s-335s
  17. S. I. Rokhlin and A. C. Guu : A Study of Arc Force, Pool Depression, and Penetration During Gas Tungsten Arc Welding, Welding Journal, 72-12 (1992), 381s-390s
  18. R.T.C. Choo, J. Szekely and R.C. Westhoff : Modeling of High-Current Arcs with Emphasis on Free Surface Phenomena in the Weld Pool, Welding Journal, 69-9(1990), 346s-361s
  19. W. R. Recchelt, J. W. Evancho and M. G. Hoy: Effect of Shielding Gas on Metal Arc Welding Aluminum, Welding Journal, 59-5(1980), 147s-155s
  20. M. Suban and J. Tusek : Dependence of Melting in MIG/MAG Welding on the Type of Shielding Gas Used, Journal of Materials Processing Technology, 119(2001), 185-192 https://doi.org/10.1016/S0924-0136(01)00940-2