The main reasons for the difficulty of arcing tungsten electrode are as follows:
Electrode Head Contamination
The surface of the electrode is stained with oil, welding slag, oxides, or other impurities, which will affect the emission of electrons, causing the arcing voltage to increase and arcing to become difficult.
Improper Sharpening Of Electrodes
If the end is too blunt or irregularly shaped, it will make it difficult to concentrate and stabilize the arc, and the arcing performance will be reduced.
Insufficient Or Abnormal Flow Direction of the Shielding Gas
The flow rate of the shielding gas (such as argon) is too low or the airflow direction is incorrect, which cannot effectively isolate the oxygen and moisture in the air, causing oxidation on the surface of the electrode and increasing the difficulty of arcing.
The Welding Current Is Too Low
The current is too small to generate enough heat to form a stable arc, making arcing difficult.
The High-frequency Arc Initiator of the Welding Machine Is Faulty or Improperly Set
Damage to high-frequency arc starting equipment or unreasonable parameter settings will cause the electrode to fail to start the arc normally.
The Electrode Material Is Not Suitable
Tungsten electrodes that are not suitable for the welding process are used, such as pure tungsten electrodes, which have poor arc initiation performance when used for DC welding.
The Electrode Is Not Securely Mounted
Loose or incorrectly positioned electrodes affect current conduction and arc formation.
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