NTUU “KPI”, UFU, PWI TQC E1814-01 Ponomarev V., Slivinsky A.

MIG/MAG globular metal transfer mode

- Welding conditions for this metal transfer mode

- Its advantages and limitations

NTUU “KPI”, UFU, PWI TQC E1814-01 Ponomarev V., Slivinsky A.

Short-circuiting

Globular Streaming rotating

Streaming

Spray

MIG-Pulsed

Transfer modes versus welding current and arc voltage

Ua

Iw

Transition current

CO2, or argon based mixtures Argon based mixtures

NTUU “KPI”, UFU, PWI TQC E1814-01 Ponomarev V., Slivinsky A.

Examples of MIG/MAGglobular metal transfer

When using a CC power source

When using a CV power source

When using a CV power source

NTUU “KPI”, UFU, PWI TQC E1814-01 Ponomarev V., Slivinsky A.

Welding conditions and application sphere of the globular transfer

Globular transfer welding conditions:

1. Low and moderate welding current;2. Moderate and high arc voltage;3. Shielding: CO2 or argon based mixtures.

MIG/MAG globular transfer application is restricted to welding in the flat position.

There might be heavy spatter when using CO2 shielding.

All that, including an irregular geometry of the resulting weld, limits use of the globular transfer mode for production applications.