Tungsten carbide electrode is a surfacing electrode with a low-hydrogen sodium coating with carbon
steel as the core. Relying on the transition of tungsten carbide alloy in the drug skin, the tungsten content
of the surfacing metal is 40% to 50%.
TIG welding (Tungsten Inert Gas Welding), also known as non-melting inert gas shielded arc welding.
The method of adding filler wire with TIG welding is often used for the bottom welding of pressure vessels,
because the airtightness of TIG welding is better to reduce the porosity of the welding seam during
welding of pressure vessels. The heat source of TIG welding is DC arc, the working voltage is 10 ~ 95
volts, but the current can reach 600 amps.
Chemical Composition:
| Type |
Designation |
Oxide Additive |
Impurity |
Tungsten |
Color |
| Type |
Content % |
Content |
Content |
Sign |
| Pure W |
WP |
/ |
/ |
<0.20 |
Balance |
Green |
| WY |
WY20 |
Y2O3 |
1.8-2.2 |
<0.20 |
Balance |
Blue |
| WC |
WC20 |
CeO2 |
1.8-2.2 |
<0.20 |
Balance |
Grey |
| WT |
WT10 |
ThO2 |
0.8-1.2 |
<0.20 |
Balance |
Yellow |
| WT20 |
ThO2 |
1.7-2.2 |
<0.20 |
Balance |
Red |
| WL |
WL10 |
La2O3 |
0.8-1.2 |
<0.20 |
Balance |
Black |
| WL20 |
La2O3 |
1.8-2.2 |
<0.20 |
Balance |
Light Blue |
| WZ |
WZ3 |
ZrO2 |
0.2-0.4 |
<0.20 |
Balance |
Brown |
| WZ8 |
ZrO2 |
0.7-0.9 |
<0.20 |
Balance |
White |
