Flux-Cored Arc Welding
Flux-cored welding uses a tubular welding wire filled with powder to supply deoxidizers and improve arc stability. This ensures a clean weld and increases toughness.
Physicochemical Mechanism of Action
The flux-cored wire consists of a tubular wire whose interior is filled with powder. This powder contains deoxidizers such as silicon or titanium dioxide and stabilizes the arc. During the welding process, these substances react with oxygen in the air, which keeps the surface of the wire cleaner.
Metallurgical Relevance & Risks When Welding
Using flux-cored wire improves deoxidation and prevents pore formation. This leads to a stronger and tougher weld. However, a wrongly chosen powder or insufficient filling can lead to instabilities in the arc or lack of deoxidizers, which in turn can cause pores or cracks.
Workshop Practice & Action Instructions
Use a tubular welding wire filled with powder for improved arc stability and deoxidation. Make sure the powder is correctly filled into the wire and the filling is not too high or too low. The temperature of the welding process should be adjusted so that the powder reacts completely and no pores form.