Cold lap or lack of fusion in welding is typically related to which type of arc transfer?

Cold lap or lack of fusion in welding is typically related to which type of arc transfer?

• A. Spray Transfer
• B. Short Circuit
• C. Pulsed Transfer
• D. Arc Transfer

Answer: (B)

Cold lap or lack of fusion in welding is predominantly associated with short circuit arc transfer. This type of transfer involves the electrode touching the weld pool and creating a circuit that momentarily "shorts" the arc, resulting in a transfer of metal during the welding process. In short circuit transfer, the molten metal is often not sufficiently heated, which can lead to inadequate fusion between the base metal and the weld metal. This can manifest as cold lap, where the weld metal does not properly fuse with the edges of the base metal, leading to weak or defective joints. The characteristics of short circuit arc transfer make it sensitive to technique and parameters such as voltage and travel speed. If these are not correctly adjusted, the likelihood of insufficient fusion increases, contributing to the occurrence of cold lap. Contrastingly, other types of transfer like spray transfer and pulsed transfer have different mechanisms that typically provide higher heat input and more consistent fusion, thus minimizing such defects.

Cold lap or lack of fusion in welding is predominantly associated with short circuit arc transfer. This type of transfer involves the electrode touching the weld pool and creating a circuit that momentarily "shorts" the arc, resulting in a transfer of metal during the welding process.

In short circuit transfer, the molten metal is often not sufficiently heated, which can lead to inadequate fusion between the base metal and the weld metal. This can manifest as cold lap, where the weld metal does not properly fuse with the edges of the base metal, leading to weak or defective joints.

The characteristics of short circuit arc transfer make it sensitive to technique and parameters such as voltage and travel speed. If these are not correctly adjusted, the likelihood of insufficient fusion increases, contributing to the occurrence of cold lap. Contrastingly, other types of transfer like spray transfer and pulsed transfer have different mechanisms that typically provide higher heat input and more consistent fusion, thus minimizing such defects.