When using AC welding aluminum, the tungsten electrode head usually needs to be spheroidized.
Here’s why:
AC Welding Characteristics
The current polarity of AC welding is constantly changing, with the electrode acting as both the cathode and the anode. During the anode, the electrode head is heated by an electric current, which is prone to ablation and deformation. The spherical end can evenly disperse heat, reduce local overheating and extend electrode life.
Stabilizing The ARC
The spherical end helps create a stable and uniform arc, reducing arc runout and ensuring a smooth welding process.
It Is Suitable for Aluminum Alloy Welding
Aluminum and its alloy welding have high requirements for heat input uniformity, and the spheroidized end can produce a wide arc, which promotes the uniform forming and good wetting of the weld.
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