Welding current supplies used in automatic and mechanised fusion welding

The main physical processes taking place at the guidewelding wire contact, are characterised by two types of wear: mechanical and electrical erosion. Mechanical wear forms as a result of the friction of the surfaces of both contacts (wire and can supply) and is expressed in the mechanical transfer o...

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Bibliographic Details
Published in:Welding international 2005-05, Vol.19 (5), p.406-412
Main Authors: Fed'ko, V T, Sapozhkov, S B, Kolmogorov, D E
Format: Article
Language:English
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Summary:The main physical processes taking place at the guidewelding wire contact, are characterised by two types of wear: mechanical and electrical erosion. Mechanical wear forms as a result of the friction of the surfaces of both contacts (wire and can supply) and is expressed in the mechanical transfer of metal particles of the current supply to the electrode wire. This type of wear is strongly affected by the hardness of materials, contacts pressure and the shear strength of the material. Electrical erosion wear is expressed by 'bridge', arc and spark erosion, arc corrosion and hot welding. The degree of electric erosion wear increases with increase of the density of current and a reduction of the stability of the contact. Electric erosion wear depends on the electro-physical properties of the material of the current-contacting guide.
ISSN:0950-7116
1754-2138
DOI:10.1533/wint.2005.3463