Transcript Перенос электродного металла при сварке

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.
Transfer modes versus welding
current and arc voltage
Ua
CO2, or argon
based mixtures
Argon based mixtures
Transition
current
Streaming rotating
Globular
Streaming
Spray
MIG-Pulsed
Short-circuiting
NTUU “KPI”, UFU, PWI TQC
E1814-01
Iw
Ponomarev V., Slivinsky A.
Examples of MIG/MAG
globular metal transfer
When using a CV power
source
NTUU “KPI”, UFU, PWI TQC
When using a CC power
source
E1814-01
When using a CV power
source
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.
NTUU “KPI”, UFU, PWI TQC
E1814-01
Ponomarev V., Slivinsky A.