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Idiomas disponibles
Idiomas disponibles
long.
Workpiece dirty.
Insufficient shielding gas at welding
arc.
Dirty welding wire
7.2.
Porosity
Porosity - small cavities or holes resulting from gas pockets in weld metal.
Possible Causes
Inadequate shielding gas
coverage
Wrong gas.
Dirty welding wire.
Workpiece dirty.
Welding wire extends too far
out of nozzle.
7.3.
Incomplete fusion
Possible Causes
Workpiece dirty.
Insufficient heat input.
Improper welding technique.
7.4.
Excessive penetration
EN
Remove all grease, oil, moisture, rust, paint, undercoating, and
dirt from work surface before welding.
Increase flow of shielding gas at regulator/flowmeter and/or
prevent drafts near welding arc.
Use clean, dry welding wire.
Eliminate pickup of oil or lubricant on welding wire from
feeder or liner.
Check for proper gas flow rate.
Remove spatter from gun nozzle.
Check gas hoses for leaks.
Eliminate drafts near welding arc.
Place nozzle 1/4 to 1/2 in. (6-13 mm) from workpiece.
Hold gun near bead at end of weld until molten metal solidifies.
Use welding grade shielding gas; change to different gas.
Use clean, dry welding wire.
Eliminate pick up of oil or lubricant on welding wire from feeder or
liner.
Remove all grease, oil, moisture, rust, paint, coatings, and dirt from
work surface before welding.
Use a more highly deoxidizing welding wire (contact supplier).
Be sure welding wire extends not more than 1/2 in. (13 mm) beyond
nozzle.
Incomplete Fusion - failure of weld metal to fuse completely with
base metal or a preceeding weld bead.
Remove all grease, oil, moisture, rust, paint, coatings, and
dirt from work surface before welding.
Select higher voltage range and/or adjust wire feed speed.
Place stringer bead in proper location(s) at j oint during
welding.
Adjust work angle or widen groove to access bottom during
welding.
Momentarily hold arc on groove side walls when using
weaving technique.
Keep arc on leading edge of weld puddle.
Use correct gun angle of 0 to 15 degrees.
Excessive Penetration - weld metal melting through
base metal and hanging underneath weld.
Corrective Actions
Corrective Actions
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