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TitanMig AU 250C Manual_ Issue A 0415
Incomplete fusion
Failure of weld metal to fuse completely with
base metal or a preceding weld bead.
Possible causes
Corrective actions
Work piece dirty.
Remove all grease, oil, moisture, rust, paint, undercoating, and
dirt from work surface before welding.
Improper welding technique.
Place stringer bead in correct location(s) at joint 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.
Insufficient heat input.
Select higher wire feed speed and/or select higher voltage
range.
Burn-through
Weld metal melting completely through base metal resulting in
holes where no metal remains.
Possible causes
Corrective actions
Excessive heat input.
Select lower voltage range and reduce wire feed speed.
Increase and/or maintain steady travel speed.
Incomplete fusion
Weld metal that is not parallel and does not cover
joint formed by base metal.
Possible causes
Corrective actions
Welding wire extends too far out of
nozzle.
Be sure welding wire extends no more than ½ in beyond
nozzle.
Unsteady hand.
Support hand on solid surface or use two hands.
Содержание TM250C
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