Which MIG transfer method uses a continuous spray of molten metal at higher current for deeper penetration?

Which MIG transfer method uses a continuous spray of molten metal at higher current for deeper penetration?

• A. Spray transfer.
• B. Globular transfer.
• C. Short-circuit transfer.
• D. Pulse transfer.

Answer: (D)

Spray transfer is the MIG transfer method that uses a continuous spray of molten metal at higher current for deeper penetration. In this mode, the arc remains stable at high current and the wire feeds a steady stream of tiny droplets into the weld pool, which produces deep penetration and smooth, uniform deposition. It requires proper shielding gas and is commonly used for thicker sections and flat or horizontal positions. By contrast, short-circuit transfer involves the wire tip touching the puddle and forming many small, frequent transfers with lower heat input; globular transfer creates large, irregular droplets with more spatter and shallower penetration; pulse transfer uses pulsed current to mimic spray behavior but isn’t a continuous spray at all times. The continuous high-current spray description clearly aligns with spray transfer.

Spray transfer is the MIG transfer method that uses a continuous spray of molten metal at higher current for deeper penetration. In this mode, the arc remains stable at high current and the wire feeds a steady stream of tiny droplets into the weld pool, which produces deep penetration and smooth, uniform deposition. It requires proper shielding gas and is commonly used for thicker sections and flat or horizontal positions. By contrast, short-circuit transfer involves the wire tip touching the puddle and forming many small, frequent transfers with lower heat input; globular transfer creates large, irregular droplets with more spatter and shallower penetration; pulse transfer uses pulsed current to mimic spray behavior but isn’t a continuous spray at all times. The continuous high-current spray description clearly aligns with spray transfer.