5
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Incomplete Fusion
Incomplete Fusion
:
Failure of weld metal to fuse completely with base metal or a preceeding weld bead.
Remove all grease, oil,moisture,rust,paint,underco-
ating,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 joint du-
ring welding.
Adjust work angle or widen groove to access bottom du-
ring 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.
Workpiece dirty
Insufficient heat input.
Improper welding technique
Possible Causes
Corrective Actions
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