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Gas influence on the arc shape in MIG-MAG welding

Published online by Cambridge University Press:  24 June 2008

S. Zielinska ,
S. Pellerin ,
F. Valensi ,
K. Dzierzega ,
K. Musiol ,
Ch. de Izarra  and
F. Briand
S. Zielinska
Affiliation:
Institute of Physics, Jagellonian University, ul. Reymonta 4, 30-459 Krakow, Poland LASEP, Faculté des Sciences-Bourges, Université d'Orléans, BP 4043, 18028 Bourges Cedex, France
S. Pellerin*
Affiliation:
LASEP, Faculté des Sciences-Bourges, Université d'Orléans, BP 4043, 18028 Bourges Cedex, France
F. Valensi
Affiliation:
LASEP, Faculté des Sciences-Bourges, Université d'Orléans, BP 4043, 18028 Bourges Cedex, France
K. Dzierzega
Affiliation:
Institute of Physics, Jagellonian University, ul. Reymonta 4, 30-459 Krakow, Poland
K. Musiol
Affiliation:
Institute of Physics, Jagellonian University, ul. Reymonta 4, 30-459 Krakow, Poland
Ch. de Izarra
Affiliation:
LASEP, Faculté des Sciences-Bourges, Université d'Orléans, BP 4043, 18028 Bourges Cedex, France
F. Briand
Affiliation:
CTAS - Air Liquide Welding, Rue d'Epluches, Saint-Ouen l'Aumône, France
*
stephane.pellerin@univ-orleans.fr
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Abstract

Composition of the applied shielding gas has a strong influence on physical properties of the plasma and parameters of the welding process. In particular, increase of the percentage of carbon dioxide in argon results in an increase of the transition current value while changing from the globular to spray mode of metal transfer during the welding process. In order to explain this phenomenon, the MIG/MAG welding arc plasma was investigated for different mixtures of argon and carbon dioxide in the shielding gas. Applying a fast camera, recording distribution of spectral lines of the plasma components, we noticed some phenomena not described yet in the literature. Especially, there is a limit in the percentage of relative concentration CO2/Ar beyond which the arc shape is significantly modified.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 43 , Issue 1 , July 2008 , pp. 111 - 122
Copyright
© EDP Sciences, 2008

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