NTUU “KPI”, UFU, PWI TQC E1813-01 Ponomarev V., Slivinsky A.

MIG/MAG short-circuitingmetal transfer

- Welding conditions for this metal transfer mode

- Its advantages and limitations

NTUU “KPI”, UFU, PWI TQC E1813-01 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 E1813-01 Ponomarev V., Slivinsky A.

Principle of MIG/MAG short-circuitingmetal transfer

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0 10 20

Ua (V)

t (ms)

Ua

Iw (A)

Iw

NTUU “KPI”, UFU, PWI TQC E1813-01 Ponomarev V., Slivinsky A.

Examples of MIG/MAGshort-circuiting metal transfer

In an argon based shielding atmosphere with a restricted short-circuit current

MAG-CO2

welding

In an argon based shielding atmosphere with a low inductance of the welding circuit

MAG-CO2 optimised metal transfer

NTUU “KPI”, UFU, PWI TQC E1813-01 Ponomarev V., Slivinsky A.

Welding conditions and application sphere of the short-circuiting transfer

Short-circuiting transfer welding conditions:

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

Application spheres:

1. Welding of thin materials (due to a low heat input);

2. Out-of-position welding.