voestalpine Bohler welding TERRA NX 320 MSE Manual De Instrucciones página 48

TROUBLESHOOTING
Blowholes
Cause
» Insufficient shielding gas.
Sticking
EN
Cause
» Incorrect arc length.
» Incorrect welding parameters.
» Incorrect welding mode.
» Pieces to be welded too big.
» Incorrect arc regulation.
Undercuts
Cause
» Incorrect welding parameters.
» Incorrect arc length.
» Incorrect welding mode.
» Insufficient shielding gas.
Oxidations
Cause
» Insufficient shielding gas.
Porosity
Cause
» Grease, varnish, rust or dirt on the workpieces to be
welded.
» Grease, varnish, rust or dirt on the filler material.
» Humidity in the filler metal.
» Incorrect arc length.
» Humidity in the welding gas.
» Insufficient shielding gas.
» The weld pool solidifies too quickly.
Solution
» Adjust the air flow.
» Check that the diffuser and the gas nozzle of the torch are in good
condition.
Solution
» Increase the distance between the electrode and the piece.
» Increase the welding voltage.
» Increase the welding current.
» Increase the welding voltage.
» Angle the torch more.
» Increase the welding current.
» Increase the welding voltage.
»
Solution
» Decrease the welding current.
» Use a smaller diameter electrode.
» Decrease the distance between the electrode and the piece.
» Decrease the welding voltage.
» Decrease the side oscillation speed while filling.
» Decrease the travel speed while welding.
» Use gases suitable for the materials to be welded.
Solution
» Adjust the air flow.
» Check that the diffuser and the gas nozzle of the torch are in good
condition.
Solution
» Clean the pieces accurately before welding.
» Always use quality materials and products.
» Keep the filler metal always in perfect condition.
» Always use quality materials and products.
» Keep the filler metal always in perfect condition.
» Decrease the distance between the electrode and the piece.
» Decrease the welding voltage.
» Always use quality materials and products.
» Ensure the gas supply system is always in perfect condition.
» Adjust the air flow.
» Check that the diffuser and the gas nozzle of the torch are in good
condition.
» Decrease the travel speed while welding.
» Pre-heat the workpieces to be welded.
» Increase the welding current.
44