Wire feed oscillation frequency
The frequency of the forward and backward movement of the welding wire to stabilize short-circuit transfer. A high frequency (e.g., 100 Hz) reduces porosity and improves surface finish.
Physical-Chemical Mechanism of Action
The wire feed oscillation frequency influences the movement of the welding wire in the weld zone. A superimposed forward and backward motion reduces spatter and improves control over the welding process.
Metallurgical Relevance & Risks in Welding
A frequency that is too high (e.g., > 100 Hz) can lead to improved surface finish and reduced porosity, which improves toughness. A frequency that is too low (< 50 Hz) can lead to irregular weld bead and increased porosity, which coarsens the microstructure and reduces hardness.
Workshop Practice & Instructions
Use a frequency between 80 and 120 Hz for optimal results. For heavy steels or at high voltage settings, a frequency of 100 Hz can be recommended. Be careful not to set the frequency too high to avoid unwanted surface finish.