Parweld XTM353S - Page 12

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Problem Cause/Correcve Acon
Incomplete fusion to base
metal
Work piece dirty.
Remove all grease, oil,
moisture, rust, paint,
coangs, and dirt from
work surface before
welding.
Insucient heat input.
Select higher voltage
range and/or adjust wire
feed speed.
Improper welding
technique. Place
stringer bead in proper
locaons) at joint during
welding.
Adjust work angle or
widen groove to access
boom 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 Penetraon
– weld metal melng
through base metal and
hanging underneath
weld.
Excessive heat input.
Select lower voltage
range and reduce wire
feed speed.
Increase travel speed.
Problem Cause/Correcve Acon
Lack Of Penetraon -
shallow
Fusion between weld
metal and
Base metal.
Improper joint
preparaon. Material
too thick. Joint
preparaon and design
must provide access to
boom of groove while
maintaining
Proper welding wire
extension and arc
characteriscs.
Improper weld
technique. Maintain
normal gun angle of 0
to 15 degrees to achieve
maximum penetraon.
Keep arc on leading
edge of weld puddle.
Ensure welding wire
extends not more than
13 mm beyond nozzle.
Insucient heat input.
Select higher wire feed
speed and/or select
higher voltage range.
Reduce travel speed.
Burn-Through - weld
metal melng
Completely through base
metal
Resulng in holes where
no metal remains.
Excessive heat input.
Select lower voltage
range and reduce wire
feed speed.
Increase and/or
maintain steady travel
speed.
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