TUNGSTEN ELECTRODE TECHNICAL REFERENCE
TUNGSTEN END PREP
Ball tip by arcing on clear metal at low current DCRP(EN) then slowly increase current to form the desired ball diameter. Return setting to AC.
TUNGSTEN GRINDING
Shape by grinding longitudinally (Never radially) Remove the sharp point to leave a truncated point with flat spot. Diameter of flat spot determines amperage capacity. The included angle determines weld bead shape and size. Generally as the included angle increases, penetration increases and bead width decreases. Use a medium (60 grit or finer) aluminium oxide wheel.
TUNGSTEN EXTENSION
TUNGSTEN ELECTRODE TIP SHAPES AND CURRENT RANGES
Thoriated, Ceriated and Lanthanated tungsten electrodes do not ball as readily as pure or zirconiated tungsten electrodes and as such are typically used for DCSP welding, These electrodes maintain a ground tip shape much better than the pure tungsten electrodes. If used on AC, Thoriated and Lanthanated electrodes often split. Regardless of the electrode tip geometry selected, it is important that a consistent tip configuration be used once a welding procedure is established, Changes In electrode geometry can have a significant influence not only on the weld bead width, depth of penetration and resultant quality, but also on the electrical characteristics of the arc.
