Which welding process uses a continuously fed filler metal electrode?

In Flux-Cored Arc Welding (FCAW), a continuously fed filler metal electrode is a defining characteristic of the process. This method utilizes a tubular wire filled with flux, which allows it to produce a shielding gas when it is heated. As the welder feeds the wire through the welding gun, it creates an arc between the wire and the workpiece, allowing for the addition of filler metal directly into the joint. The continuous feed of the electrode enhances the efficiency and speed of the welding operation, making it suitable for various positions and thicker materials.

The other processes mentioned do not utilize a continuously fed filler metal in the same manner. In Gas Tungsten Arc Welding, a non-consumable tungsten electrode is used, and a separate filler metal may be added manually as needed. In Shielded Metal Arc Welding, also known as stick welding, the electrode itself is a consumable but is not continuously fed; instead, it is used until it shortens and needs to be replaced. Submerged Arc Welding uses a solid wire electrode that is also manually fed and not continuously supplied during the welding operation.