Cerium Cerium tungsten rod tungsten needle basics

Pure tungsten carbide inserts electrode W1 W ≥ 99.92 SiO2 ≤ 0.03 Fe2O3Al2 ≤ 0.03 Mo ≤ 0.01 CaO thorium tungsten 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 melting and boiling points high, not easy to melt volatile, burning, cutting-edge, less pollution, but the electron emission is poor, is not conducive to the stability of 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 on the need to prevent contamination of the base metal under special conditions, you can use this tungsten. The hemispherical tip of the electrode and easy to maintain, for AC welding. 0001 55 916.807 rod .. Such electrodes are containing tungsten carbide, boron, manganese and high abrasive wear of welding electrodes, AC-DC dual-use, with good performance Abrasive cerium tungsten ingredients in a pure tungsten mass fraction of 1.8% -2.2% of ceria 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 of pure tungsten W1 W ≥ 99.92 SiO2 ≤ 0.03 Fe2O3Al2 ≤ 0.03 Mo ≤ 0.01 CaO thorium tungsten 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, is now widely used as a electrodes of pure tungsten high melting and boiling points, easy to melt evaporation, burning, cutting-edge, less pollution, but the electron emission is poor, is not conducive to the stability of 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 on the need to prevent contamination of the base metal under special conditions, you can use this tungsten. The hemispherical tip of the electrode and easy to maintain, for AC welding.