Question

What type of metal transfer occurs when GMAW welding requires higher current voltages?

1) Spray transfer
2) Globular transfer
3) Short circuiting transfer
4) Pulsed spray transfer

Answer 1

In GMAW welding, higher current voltages lead to a 'spray transfer' process, where fine droplets of metal are sprayed across the arc resulting in stable and clean welds.

Step-by-step explanation:

When GMAW (Gas Metal Arc Welding) welding requires higher current voltages, the type of metal transfer that occurs is known as spray transfer. In spray transfer, the electrode melts into very fine droplets that are smaller than the diameter of the wire, and these droplets are sprayed across the arc into the weld puddle. This method of transfer is typically used with higher voltage settings and provides a stable arc and relatively spatter-free welds.