What does an excessive angle cause in the GTAW process?

In the Gas Tungsten Arc Welding (GTAW) process, maintaining the proper electrode angle is crucial for achieving high-quality welds. An excessive angle can lead to an inconsistent weld quality for several reasons.

When the welding torch is angled too much, it can disrupt the flow of the shielding gas, which is vital for protecting the weld pool from atmospheric contamination. Insufficient shielding can lead to oxidation or other defects in the weld. Furthermore, an improper angle can affect the stability of the arc, making it more difficult to maintain a consistent weld bead. This inconsistency can result in issues such as uneven penetration or a weld that lacks the necessary fusion between materials.

The weld pool's shape and characteristics can also be influenced negatively by an excessive angle, further contributing to variations in the finished weld. Therefore, maintaining the correct angle is fundamental to ensuring that the weld quality remains consistent throughout the welding process.