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  • Tungsten electrodes are easily broken after sharpening

    Q Tungsten electrodes are easily broken after sharpening

    2021-11-01     186

    A

    Cause Analysis:

    1. Excessive current used. Tungsten poles are used for a long time under high current conditions. When the temperature reaches the recrystallization temperature of tungsten grains (1600°C), the tungsten grains will become round and thick, and the tungsten poles will become brittle.

    solution:

    1. For long-term use, the current should be used near the allowable current of the tungsten needle.




  • Arc Divergence

    Q Arc Divergence

    2021-11-01     189

    A

    Cause Analysis:

    1. Horizontal sharpening, the wear scar is perpendicular to the axis of the electrode; 2. The wear scar is rough, resulting in scattered discharge points; 3. The pointed tip does not meet the requirements.

    solution:

    1. Use longitudinal sharpening; 2. Use a grinding wheel with smaller particles; 3. Determine the size of the sharpening part according to the arc concentration requirements.




  • Arc deviation

    Q Arc deviation

    2021-11-01     223

    A

    Cause Analysis:

    1. The tungsten electrode has pores; 2. the tungsten electrode is split; 3. the arc starting current is set too large.

    solution:

    1. Cut off the tip and sharpen it again; 2. Cut off the split and sharpen it or replace it with a new tungsten electrode; 3. Set the arc starting current to about half of the upper limit of the working current.




  • Tungsten electrodes are prone to mushroom heads?

    Q Tungsten electrodes are prone to mushroom heads?

    2021-11-01     272

    A

    Cause Analysis:

    1. The tungsten electrode has pores; 2. The sharpening point is not concentric; 3. There is a problem with the welding torch angle.

    solution:

    1. The tungsten electrode is not straight, it can be straightened by hand, and you can't find the manufacturer to replace it; 2. Use a sharpened tungsten electrode with high concentricity, and re-sharpened the tip in time after the mushroom head is generated during the welding process of the tungsten electrode tip; 3. Check the welding Adjust the torch angle in time.




  • Tungsten electrode burns quickly?

    Q Tungsten electrode burns quickly?

    2021-11-01     208

    A

    Cause Analysis :

    1. Excessive current; 2. Unskilled operation techniques, the tungsten electrode is in contact with the base material; 3. Wrong selection of the tungsten electrode, including diameter and variety; 4. The tungsten electrode protrudes too long; 5. The tungsten electrode sharpens too long; 6. The impure argon gas causes the tungsten needle to oxidize; 7. The flow of argon gas is too large or too small, which causes the tungsten needle to contact with the air, and the tip oxidizes.

    solution:

    1. Control the allowable current value to adjust the current; 2. Contact arc starting operation should be proficient or switch to high frequency, pulse arc starting, avoid tungsten electrode contact with the base metal during welding; 3. Choose a larger diameter tungsten needle, In the case of welding, choose pure tungsten electrode (green head) or zirconium tungsten electrode (white head); 4. The extension length of the tungsten electrode should be adjusted according to the argon gas flow and the size of the porcelain nozzle; 5. The sharpening angle should be appropriately increased. For details, see "Guide to the Shape and Angle of Tungsten Pole Sharpening"; 6. Ensure that the argon is dry and moisture-free, and the purity is above 99.9%; 7. Adjust the argon flow to moderate.




  • Cracks, hollow cores, or longitudinal splits occur during the sharpening of the tungsten electrode?

    Q Cracks, hollow cores, or longitudinal splits occur during the sharpening of the tungsten electrode?

    2021-11-01     196

    A

    Cause Analysis:

    1. Tungsten pole splits and splits.

    solution:

    1. Cut off the cracked place; 2. Find a manufacturer for replacement; 3. Perform flaw detection 100%.




  • Tungsten electrode headshot blooming?

    Q Tungsten electrode headshot blooming?

    2021-11-01     255

    A

    Cause Analysis:

    1. The tungsten electrode has pores; 2. the tungsten electrode is split; 3. the arc starting current is set too large.

    solution:

    1. Cut off the tip and sharpen it again; 2. Cut off the split and sharpen it or replace it with a new tungsten electrode; 3. Set the arc starting current to about half of the upper limit of the working current.



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