Experimental investigations of the arc MIG-MAG welding

Journal Article · Sun Jan 15 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2168801· OSTI ID:20797970

Pellerin, N ^[1]; Zielinska, S ^[2]; Pellerin, S; Valensi, F; Izarra, Ch de ^[3]; Musiol, K ^[2]; Briand, F; Richard, F ^[4]

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1. CRMHT - Centre Universitaire de Bourges, BP 4043, 18028 Bourges cedex 2 (France)
2. M. Smoluchowski Institut of Physics, Jagellonian Univ., ul. Reymonta 4, 30-459 Cracow (Poland)
3. LASEP - Centre Universitaire de Bourges/Universite d'Orleans, BP 4043, 18028 Bourges cedex 2 (France)
4. CTAS - Air Liquide Welding, Saint Ouen l'Aumone, 95315 Cergy-Pontoise cedex (France)

The type of the applied shielding gas has a strong influence on quality of the welding process. In particular, increase of the percentage of carbon dioxide in argon, causes increase of the transition current value from the globular to spray mode of metal transfer. Observations by fast camera allows to better characterize the arc column shape in the different working modes. The spectroscopic diagnostic of the welding arc is also necessary to understand the observed changes in the mode of droplet transfer. The use of an original diagnostic method allows to estimate the temperature and the electronic density distributions in the plasma without hypothesis on its equilibrium state. Results of this work seem to show that the observed effects could be linked to the microstructural modifications of the anode tip during the MIG-MAG welding process as a function of the gas composition, and especially to the existence and disappearance of an insulating oxide 'gangue' at the wire extremity.

• OSTI ID: 20797970
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 812; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARC WELDING
ARGON
CAMERAS
CARBON DIOXIDE
DISTRIBUTION
DROPLETS
ELECTRON TEMPERATURE
ION TEMPERATURE
METALS
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PROCESSING