Heat and metal transfer in gas metal arc welding using argon and helium
- Massachusetts Inst. of Technology, Cambridge, MA (United States). Dept. of Materials Science and Engineering
This article describes a theoretical investigation on the arc parameters and metal transfer in gas metal arc welding (GMAW) of mild steel using argon and helium shielding gases. Major differences in the predicted arc parameters were determined to be due to large differences in thermophysical properties. Various findings from the study include that an arc cannot be struck in a pure helium atmosphere without the assistance of metal vapor, that a strong electromagnetic cathode force affects the fluid flow and heat transfer in the helium arc, providing a possible explanation for the experimentally observed globular transfer mode and that the tapering of t electrode in an argon arc is caused by electron condensation on the side of the electrode.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 42844
- Journal Information:
- Metallurgical Transactions, B, Vol. 26, Issue 2; Other Information: PBD: Apr 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of shielding gas compositions on arc plasma and metal transfer in gas metal arc welding
Heat and mass transfer in the gas tungsten and gas metal arc welding processes