In GTAW, which practice is not recommended when adding filler metal?

In GTAW, which practice is not recommended when adding filler metal?

• A. Remove filler from weld zone to cool
• B. Keep filler at the weld zone
• C. Feed filler smoothly
• D. Use continuous filler deposition

Answer: (A)

In GTAW, the filler metal should be added into the molten pool as you weld, with the heat and shielding maintaining a steady, hot weld zone. Keeping the filler in the weld zone and feeding it smoothly ensures the filler fuses properly with the base metal and the bead forms evenly as you travel. Pulling filler away from the weld zone to let it cool interrupts the heat input and the deposition, which can cause the pool to solidify prematurely. That tends to produce an underfilled or uneven bead, possible lack of fusion, and porosity from rapid cooling. For a sound joint, you want continuous, controlled filler deposition kept in the weld zone.

In GTAW, the filler metal should be added into the molten pool as you weld, with the heat and shielding maintaining a steady, hot weld zone. Keeping the filler in the weld zone and feeding it smoothly ensures the filler fuses properly with the base metal and the bead forms evenly as you travel. Pulling filler away from the weld zone to let it cool interrupts the heat input and the deposition, which can cause the pool to solidify prematurely. That tends to produce an underfilled or uneven bead, possible lack of fusion, and porosity from rapid cooling. For a sound joint, you want continuous, controlled filler deposition kept in the weld zone.