Main features:

TIG welding machine with a tungsten needle prices thorium tungsten welding cerium tungsten ingredients in a pure tungsten added mass fraction of 1.8% -2.2% cerium oxide and impurities ≤ 0.1% of the electrode. The advantage is cerium tungsten X-ray dose and antioxidant properties than thorium tungsten have been greatly improved; electronic thorium tungsten electrode work function than about 10%, the arc easier and better arc stability. Also cerium tungsten chemical stability, cathode spot is small, low pressure drop, burning and less, so is the most widely used TIG welding a tungsten electrode.
    Commonly used tungsten chemical composition and grade
    Pure tungsten copper alloy electrode W1 W ≥ 99.92 SiO2 ≤ 0.03 Fe2O3Al2 ≤ 0.03 Mo ≤ 0.01 CaO
    Thoriated tungsten electrode WTH-7 W margin other impurities is not more than the total mass fraction of 0.15%
    Cerium tungsten WCe-20 W margin CeO1.8-2.2 SiO2 ≤ 0.06 Fe2O3AI2O3 ≤ 0.02 Mo ≤ 0.01 CaO ≤ 0.01
    Cerium tungsten low electron work function, high chemical stability, allowing current density, non-radioactive, are now widely used in an electrode of pure tungsten wire high melting and boiling points, easy to melt evaporation, burning, cutting-edge, less pollution, However, poor electron emission, is not conducive to the stability of the arc burning.
    Thorium tungsten electron emission capability, allowing high current density arc burning more stable, but with a certain radioactive elements thorium, promote the application be affected.
    Zirconium tungsten electrode must be protected from contamination on the base metal under special conditions, you can use this tungsten. This easy to maintain the hemispherical tip of the electrode, suitable for AC welding pieces, quality assurance, welcome to consult the discussion