Topics covering the permanent joining of metal or plastic
What is gas surge? Gas surge is a rush of gas from a TIG or MIG torch when the trigger is pulled. The initial rush is at several times the required flow rate, before settles down to the value set by the flow meter. The consequences of gas surge There are three […]
Shielding Gas Surge Read More »
Arc welding is a form of fusion welding where the heat needed to fuse the metal is created by an electric arc contained in a plasma of positive and negatively charged particles. The polarity of the voltage that sustains the arc has a significant effect on: Arc stability The amount of spatter generated Depth of
When Gas Tungsten Arc Welding (GTAW) oxide-forming materials such as aluminium and magnesium, DCEN for penetration and DCEP for its cleaning action can be used together. This is referred to as Alternating Current (AC) welding. Figure 1 (a). Representation of a sinusoidal voltage Figure 1 (b). Representation of a square wave voltage In both the
