Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지
DOI QR코드

DOI QR Code

High Current MIG Welding of Al 5083 Alloy under Ar/He Mixed Gas Shielding

Ar/He 보호가스분위기에서 Al 5083 합금의 대전류 MIG 용접특성

  • 최영배 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 황인성 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 강문진 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 김동철 (한국생산기술연구원 용접접합연구실용화그룹)
  • Received : 2013.12.10
  • Accepted : 2014.02.11
  • Published : 2014.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, use of thick Al 5083 plate has increased in production of LNG storage tank. In general, multi-pass welding has been used to achieve sufficient penetration in thick plate welding. High current welding which enables high deposition and deep penetration is preferred in thick plate welding because the increase of number of pass increases manufacturing cost and formation of weld defect. In this study, welding characteristics according to various Ar/He shielding gas composition was investigated in high current MIG welding. The bead-on-plate welding and V groove welding were conducted on Al 5083 alloy with a thickness of .25 mm. The effect of shielding gas composition on bead shape was evaluated and proper shielding gas composition was proposed. Also arc stability was examined under selected shielding gas composition. One side-one pass welding experiments were conducted for V groove specimen with a thickness of 25 mm. Mechanical properties and hardness profiles were measured for the V groove specimens.

Keywords

References

  1. S.H. Hong : Present Status and Prospect of LNG Storage Tank, Journal of KWS 13-3 (1995), 1-7 (in Korean)
  2. Baba O, Okumoto Y and Abe A : Production process of aluminium alloy tank of SPB LNG carrier, Weld Int 2008; 22: 438-445 https://doi.org/10.1080/09507110802337606
  3. Kumai S, Umezawa O, Takayama Y, et al. Structure and welding technologies for SPB LNG aluminium tank. In: Proceedings of the 12th international conference on aluminium alloys, Ykohama, Japan, 5-9 September 2010, 82-87. Tokyo: The Japan Institute of Light Metals
  4. Miyazaki H, Miyauchi H, Sugiyama Y, et al. Puckering in aluminium alloy welds - prevention using double wire MIG welding. Weld Int 1993; 7:431-437 https://doi.org/10.1080/09507119309548422
  5. Kiyohara M, Effects of wire diameter on weldability in high current MIG welding of thick plate Al-Mg alloy. J Light Met Weld Constr 1977;56:20-28
  6. C. H. Lee, and R. W. Jang, Weldability of Al alloys, Part I : Cracking and Porosity, KWS 10-3 (1992), 1-7 (in Korean)
  7. J. H, Hwang and J. G. Yoon, A study on the cracking at the Al alloy weld deposited by a high current MIG process, KWJS, 1 (1996), 179-182
  8. Lucas, "Shielding gases for arc welding part," Welding & Metal Fabrication 1992, 218-22
  9. The Aluminum Association : Welding Aluminum (Theory and Practice). Fourth Edition, 2002, 7.17
  10. Rule for Classification Steel Ships : Part 2 Material and Welding, Korean Register of Shipping, 1998, 94-115

Cited by

  1. Latest welding technology for storage and transportation facilities of liquified natural gas vol.40, pp.1, 2016, https://doi.org/10.5916/jkosme.2016.40.1.17