ELECTRON WORK FUNCTION :
For perfect ignition & arc stability, the electron work function needs to be as low as possible. This is guaranteed by the oxide doping of tungsten.
OXIDE CONTENT :
A decisive factor for the characteristics of an electrode is the volume percentage of oxide additives. In thorium free qualities this content is higher than in a conventional Wt20 electrode.
OXIDE DISTRIBUTION :
The more homogeneous & fine distributed the oxides are in the structure, the better are the effects on arc stability, ignition, burn-off behavior and service life.
The thorium free qualities Wc20 & GOLD plus are characterized by a considerably more homogeneous and finer distribution of oxides.
BURN-OFF / SERVICE LIFE :
Crack-free electrodes as well as a constant electrode tip geometry are required for low burn-off & therefore long service life. Due to perfect precision in the forming process, PLANSEE supplies high quality electrodes without any distribution of oxides.
THORIUM FREE TIG WELDING ELECTRODES :
The substitute materials cerium & lanthanum have proofed themselves as non-radioactives substitutes for thorium oxide. Both materials have an especially low electron work function, which is even lower than that of thorium oxide. Our thorium free TIG-welding electrodes (W, Wc20, GOLD plus) meet requirements concerning ecological & health related aspects.
|ELECTRODE TYPE||ELECTRODE TYPE||FIELDS OF APPLICATION||ELECTRODE TYPE|
|GOLD plus (1.5%, Lanthan Gold)||AC/DC||Non & high alloyed steels, aluminium alloy, magnesium alloys, titanium alloys, nickel alloys, copper alloys||Excellent ignition & reignition, performance long service life, especially in the higher current range, excellent arc stability, suitable for high demands to replace WT20|
|WC20 (2.0% cer. Grey)||AC/DC||Non & high alloyed steels, aluminium alloy, magnesium alloys, titanium alloys, nickel alloys, copper alloys||Excellent ignition & reignition in the low air range, long service life, excellent arc stability, to replace WT20|
|W (100% W, green)||AC||Aluminium alloys, magnesium alloys||Good arc stability, lower current carrying capacity than doped electrodes|
|WT20 (2.0% thorium, red)||DC||Non & high alloyed steels, titanium alloys, nickel, copper||Good ignition & reignition performance, possible health risks if not handled properly, replace by GOLDplus orWC20|| |