Metal Transfer in Gas Metal Arc Welding
Abstract
The ultimate goal of the present work is to develop sufficient fundamental understanding of generic GMA welding to enable prediction of the weld quality to be made in terms of the material properties and control parameters. Evidence from experiments and simple analyses shows that the melting rate is controlled by the thermofluid-mechanic behavior of the solid electrode and the molten electrode tip. Consequently, an analytical and numerical study of the transient, thermalfluid-mechanic behavior of the electrode region in GMA welding continues. The present report discusses two idealized regions separately: (1) steady thermal conduction in a moving solid electrode and (2) transient droplet formation. The method of superposition and classical techniques were used to describe the temperature distribution in an electrode heated on the side by electron condensation. A transient numerical analysis for the liquid droplet or streaming jet is being developed using LaGrangian governing equations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1989
- Accession Number
- ADA213390
Entities
People
- Donald M. Mceligot