Tungsten

Causes: (1) Tungsten electrode directly contacts the weldment    (2) Tungsten electrode melts

Preventive measures: (1) Use high-frequency arc ignition (2) Reduce welding current or increase the diameter of the tungsten electrode (3) Replace the tungsten electrode with cracks

Poor gas protection

Cause: The purity of argon is not high

Preventive measures: (1) Use argon gas with a purity of 99.99% (2) Sufficient air supply and delayed gas stop time (3) Do a good job of cleaning before welding (4) Correctly select the shielding gas flow rate  (5) Increase the nozzle Dimensions, electrode extension length, etc. 

Arc instability

Causes: (1) There is oil contamination on the weldment  (2) Tungsten electrode contamination (3) The diameter of the tungsten electrode is too large (4) The arc length is too long (5) The tip of the tungsten electrode is not well ground

Preventive measures: (1) Do a good job of cleaning up before welding  (2)Remove the contaminated part (3)Use the correct size tungsten electrode and chuck (4) Adjust the nozzle distance (5) Re-grind the extreme cone angle of tungsten

Tungsten loss

Causes: (1) The protection is not good, and the tungsten electrode is oxidized. (2) The polarity of the gun and the welding machine is reversed. (3) The chuck is overheated.   (4) The diameter of the tungsten electrode is too small.   (5) The tungsten electrode is oxidized when the welding stops.

Preventive measures: (1) Clean the nozzle, shorten the nozzle distance, and appropriately increase the argon flow    (2) Change the connection between the welding gun and the welding machine output (3) Increase the diameter of the chuck   (4) Increase the diameter of the tungsten electrode