Task of volumetrical evaporation and behaviour of droplets in pulsed MIG welding of AlMg alloys

摘要

The mainly used aluminium alloys in automobile industry are AlMg alloys. Because of the significant difference in the evaporation temperatures of aluminium and magnesium, the process of metal transfer through the welding arc is often very unstable. This has an influence on the droplet behaviour as well as on the physical properties of arc plasma. Understanding the physical phenomena in AlMg droplets in MIG welding helps to have a better control of the welding process. This paper presents the results of study of a task concerning volumetrical evaporation and behaviour of droplets in pulsed MIG welding of AlMg alloys.