Which transfer mode has fine droplets transferred across the arc?

Which transfer mode has fine droplets transferred across the arc?

• A. spray transfer
• B. globular transfer
• C. short circuit transfer
• D. pulsed spray transfer

Answer: (A)

In GMAW, the mode where metal is delivered as a fine, continuous spray of small droplets across the arc is spray transfer. This happens at higher welding currents with appropriate shielding gas, and the tiny droplets are carried across the arc by the gas flow to the weld pool, giving a stable arc and a smooth, high-deposition-rate bead. The other modes behave differently: globular transfer uses larger, irregular droplets that break off sporadically and cause spatter; short circuit transfer involves droplets that touch the workpiece and repeatedly short the arc; pulsed spray transfer is basically spray transfer delivered in pulses to control heat input. The phrase “fine droplets transferred across the arc” points to spray transfer as the best match.

In GMAW, the mode where metal is delivered as a fine, continuous spray of small droplets across the arc is spray transfer. This happens at higher welding currents with appropriate shielding gas, and the tiny droplets are carried across the arc by the gas flow to the weld pool, giving a stable arc and a smooth, high-deposition-rate bead. The other modes behave differently: globular transfer uses larger, irregular droplets that break off sporadically and cause spatter; short circuit transfer involves droplets that touch the workpiece and repeatedly short the arc; pulsed spray transfer is basically spray transfer delivered in pulses to control heat input. The phrase “fine droplets transferred across the arc” points to spray transfer as the best match.