Melt Track Overlap Factor
The melt track overlap factor is the ratio between track spacing and melt track width. A too low value leads to lack of fusion and incomplete layers.
Physico-chemical mechanism of action
The melt track overlap factor describes how much the melt tracks overlap. This affects the bond quality between tracks and thus the overall strength of the weld.
Metallurgical relevance & risks in welding
A too low overlap factor (e.g., below 0.7) results in gaps and lack of fusion between layers. This can lead to pulling, cracking, or reduced mechanical properties of the weld. A too high value (above 1.2) can cause excessive joint strength and possible stresses in the weld.
Workshop practice & instructions
To ensure gapless layer formation, the melt track overlap factor should be between 0.7 and 1.2. This is achieved by correctly setting the track spacing relative to the melt track width. If you have lack of fusion issues, check the track spacing and adjust it accordingly.