GMAW

Shielding Gas Surge

Leave a Comment / GMAW, GTAW, Welding / Jack Ryan

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 […]

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Arc Polarity

Leave a Comment / GMAW, GTAW, SMAW, Welding / Jack Ryan

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

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