voestalpine Uranos 4000 PME Instrucciones De Uso página 32

Cause Insufficient shielding gas.
Solution Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good conditions.
Cause Incorrect welding mode.
Solution Decrease the torch angle.
Insufficient penetration
Cause Incorrect welding mode.
Solution Decrease the welding travel speed.
Cause Incorrect welding parameters.
Solution Increase the welding current.
Cause Incorrect electrode.
Solution Use a smaller diameter electrode.
Cause Incorrect edge preparation.
Solution Increase the chamfering.
Cause Incorrect earth connection.
Solution Earth the system correctly
Read the paragraph "Installation ".
Cause Pieces to be welded too big.
Solution Increase the welding current.
Slag inclusions
Cause Poor cleanliness.
Solution Clean the pieces accurately before welding.
Cause Electrode diameter too big.
Solution Use a smaller diameter electrode.
Cause Incorrect edge preparation.
Solution Increase the chamfering.
Cause Incorrect welding mode.
Solution Decrease the distance between the electrode and
the piece.
Move regularly during all the welding operations.
Tungsten inclusions
Cause Incorrect welding parameters.
Solution Decrease the welding voltage.
Use a bigger diameter electrode.
Cause Incorrect electrode.
Solution Always use quality materials and products.
Sharpen the electrode carefully.
Cause Incorrect welding mode.
Solution Avoid contact between the electrode and the weld pool.
Blowholes
Cause Insufficient shielding gas.
Solution Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good condition.
Sticking
Cause Incorrect arc length.
Solution Increase the distance between the electrode and
the piece.
Increase the welding voltage.
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Undercuts
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Oxidations
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Porosity
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Incorrect welding parameters.
Increase the welding current.
Incorrect welding mode.
Angle the torch more.
Pieces to be welded too big.
Increase the welding current.
Increase the welding voltage.
Incorrect arc regulation.
Increase the equivalent circuit inductive value setting.
Incorrect welding parameters.
Decrease the welding voltage.
Use a smaller diameter electrode.
Incorrect arc length.
Increase the distance between the electrode and
the piece.
Increase the welding voltage.
Incorrect welding mode.
Decrease the side oscillation speed while filling.
Decrease the travel speed while welding.
Insufficient shielding gas.
Use gases suitable for the materials to be welded.
Insufficient gas protection.
Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good condition.
Grease, varnish, rust or dirt on the workpieces to
be welded.
Clean the workpieces carefully before welding.
Grease, varnish, rust or dirt on the filler material.
Always use quality materials and products.
Keep the filler metal always in perfect condition.
Humidity in the filler metal.
Always use quality materials and products.
Keep the filler metal always in perfect condition.
Incorrect arc length.
Decrease the distance between the electrode and
the piece.
Decrease the welding voltage.
Humidity in the welding gas.
Always use quality materials and products.
Ensure the gas supply system is always in perfect
condition.
Insufficient shielding gas.
Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good condition.
The weld pool solidifies too quickly.
Decrease the travel speed while welding .
Pre-heat the workpieces to be welded.
Increase the welding current.