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Excessive spatter
Scattering of molten metal particles that cool to solid near
weld bead.
Possible causes
Corrective actions
Wire feed speed too high.
Select lower wire feed speed.
Voltage too high.
Select lower voltage.
Electrode extension too long.
Use shorter electrode extension.
Work piece dirty.
Remove all grease, oil, moisture, rust, paint, undercoating, and
dirt from work surface before welding.
Insufficient shielding gas at arc.
Increase flow of shielding gas at regulator and/or prevent
drafts near welding arc.
Dirty welding wire.
Use clean, dry welding wire.
Eliminate pickup of oil or lubricant on welding wire from
feeder or liner.
Porosity
Small cavities or holes resulting from gas pockets in weld
material.
Possible causes
Corrective actions
Wrong gas.
Use welding grade shielding gas; change to different gas.
Welding wire extends too far out of
nozzle.
Be sure welding wire extends no more than ½ in beyond
nozzle.
Work piece dirty.
Remove all grease, oil, moisture, rust, paint, undercoating, and
dirt from work surface before welding.
Use a highly deoxidising welding wire (contact supplier).
Insufficient shielding gas at arc.
Increase flow of shielding gas at regulator and/or prevent
drafts near welding arc.
Remove spatter from gun nozzle.
Check gas hoses for leaks.
Place nozzle ¼ to ½ in from work piece.
Hold gun near bead at end of weld until molten metal
solidifies.
Dirty welding wire.
Use clean, dry welding wire.
Eliminate pickup of oil or lubricant on welding wire from
Содержание TM250C
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