Droplet detachment frequency
The droplet detachment frequency is the rate at which molten droplets detach from the welding wire and enter the weld pool. It is controlled by pulse current parameters.
Physicochemical Mechanism of Action
The droplet detachment frequency refers to the number of droplets that detach from a welding wire and enter the weld pool. This frequency is influenced by pulse current parameters such as voltage, current, and pulse duration.
Metallurgical Relevance & Risks During Welding
A too high droplet detachment frequency can lead to uneven melt distribution, which causes porosity and loss of strength. A too low frequency increases droplet size and raises the risk of hot cracks and spatter.
Workshop Practice & Action Instructions
To achieve an optimal droplet detachment frequency, adjust the pulse current parameters. A typical frequency is about 10-20 Hz for steel. Higher voltage and shorter pulse duration will increase the frequency; conversely, it decreases with lower voltage and longer pulse duration.