The effect of shielding gas composition in CO2 laser-gas metal arc hybrid welding
- Authors
- Chae, Hyunriyung Byung; Kim, Cheol Hee; Kim, JJeong Han; Rhee, Se Hun
- Issue Date
- Nov-2008
- Publisher
- SAGE PUBLICATIONS LTD
- Keywords
- CO2 laser welding; gas metal arc welding (GMAW); hybrid welding; laser-induced plasma; shielding gas
- Citation
- PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, v.222, no.11, pp.1315 - 1324
- Indexed
- SCIE
SCOPUS
- Journal Title
- PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
- Volume
- 222
- Number
- 11
- Start Page
- 1315
- End Page
- 1324
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177699
- DOI
- 10.1243/09544054JEM944
- ISSN
- 0954-4054
- Abstract
- In carbon dioxide (CO2) laser-gas metal arc hybrid welding, a shielding gas is supplied to isolate the molten metal from the ambient air, suppress the laser-induced plasma, remove the plume out of the keyhole, and stabilize the metal transfer. In this study, a shielding gas consisting of helium, argon, and CO2 was used, and its effects on the composition of the welding phenomena, such as behaviours of laser-induced plasma generation, molten pool flow, and droplet transfer in gas metal arc welding, were investigated. High-speed video observation was used to investigate the welding phenomena inside the arc regime. Consequently, helium was found to have a dominant role in suppressing laser-induced plasma; minimum helium content at a laser power of 8 kW was suggested for laser autogenous and hybrid welding. Argon and CO2 govern the droplet transfer and arc stability. A 1.2 per cent addition Of CO2 stabilizes the metal transfer and eliminates undercut caused by insufficient wetting of molten metal.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 기계공학부 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.