by Graham Fry | Oct 17, 2018 | Articles, Publications, Resources
In TIG welding, the arc burns between the workpiece and a non-consumable tungsten electrode. To protect the electrode and molten pool from oxidation, both are shielded with an inert gas, generally argon. This welding process is suitable for all fusion-weldable metals....
by Graham Fry | Oct 17, 2018 | Articles, Publications, Resources
Gas metal arc brazing (GMA brazing) is an alternative method for joining primarily thin (t < 3.0mm) sheets that have been coated for corrosion protection. This method offers considerable advantages over GMA welding since an alloy metal with a lower melting point...
by Graham Fry | Oct 17, 2018 | Articles, Publications, Resources
MIG welding of aluminium can be performed in the short, spray or pulsed arc. The advantages of the pulsed technique are that spatter formation is reduced and a wire electrode with the next largest diameter can be used. The larger diameter wire is easier to feed and,...
by Graham Fry | Oct 17, 2018 | Articles, Publications, Resources
The shielding gases used for stainless steels differ from those used in GMA welding of unalloyed steels since they contain much less active gases, such as oxygen and carbon dioxide. This is necessary to prevent excessive oxidation of the passive layer responsible for...
by Graham Fry | Oct 17, 2018 | Articles, Publications, Resources
The collective term ‘structural steel’ refers to unalloyed and low-alloyed steels, fine-grained structural steels that are suitable for welding mild steel. The choice of the most suitable shielding gas depends mainly on the type of filler metal, the material thickness...
by Graham Fry | Oct 17, 2018 | Articles, Publications, Resources
Abstract In fabrication or construction, the goal is higher product quality with improved performance. This is especially important with relation to the GMA and TIG welding processes. I have heard many people comment to me that shielding gases only protect the welding...
