Spray Arc Droplet Acceleration
Spray arc droplet acceleration accelerates molten droplets by electromagnetic forces and plasma stream toward the weld pool. This happens continuously without direct short-circuit contact.
Physical-Chemical Mechanism of Action
Spray arc droplet acceleration uses electromagnetic forces and the plasma stream to accelerate molten droplets. The current creates an electric field that attracts the droplets and drives them toward the weld pool.
Metallurgical Relevance & Welding Risks
This acceleration improves the droplet transfer rate and increases the efficiency of the welding process. However, irregular current or poor control of droplet speed can lead to uneven weld cooling, which poses risks of cracking and toughness variations.
Workshop Practice & Action Guidelines
To use spray arc droplet acceleration effectively, ensure a stable power supply and regulate the droplet speed. An average speed of 10 m/s is typical. If you have acceleration issues, check the electromagnetics and the plasma current.