In Submerged Arc Welding, how is the flux applied to the weld area?

In Submerged Arc Welding (SAW), the flux is automatically applied to the weld area from a hopper. This method enables a consistent and controlled deposition of flux, which is crucial for creating a protective barrier during the welding process. The flux covers the weld pool and prevents contamination from atmospheric gases, thus ensuring good weld quality.

The use of automated flux application enhances efficiency and allows for higher deposition rates, as it minimizes the labor involved compared to manual methods. Consistent application also contributes to the overall uniformity of the weld bead. Automatic systems can adjust the amount and distribution of flux as required, which is not feasible with manual sprinkling or mixing with the filler metal.

Pre-mixing the flux with the filler metal could lead to inconsistent results and can complicate the welding process, making this option less favorable. Additionally, not applying flux at all would negate the protective benefits that it provides during welding, likely resulting in inferior weld quality. Therefore, the automated flux application method from a hopper is the preferred and standard practice in submerged arc welding.