Short Circuit Arc Frequency
The short-circuit frequency in short arc indicates how often the welding wire touches the weld pool per second. An optimal frequency reduces spatter and improves weld quality.
Physicochemical Mechanism of Action
The short-circuit frequency determines how often the welding wire touches the molten weld pool. At each contact, a brief electrical explosion occurs, melting the wire and forming a physical material bridge.
Metallurgical Relevance & Risks in Welding
Too high a frequency can lead to spattering explosion reactions, resulting in irregular weld structure and possible cracks in the material. Too low a frequency slows down the welding process and can lead to missing material bridges and poor weld quality.
Workshop Practice & Instructions
The optimal short-circuit frequency is usually between 50 and 150 Hz. For heavy steels or at high speeds, the frequency can be increased up to 200 Hz. Always monitor the weld for regularity and lack of spatter to set the optimal frequency.