Tungsten alloy bars are made from tungsten matrix blended with 0.3%-5% of rare earth elements, such as cerium, thorium, lanthanum, yttrium, zirconium, by powder metallurgy method. Tungsten electrode is made of the tungsten alloy bar by pressure processing. Tungsten electrodes with the diameter of 1mm, 1.6mm, 2.4mm and 3.2mm are most commonly used. The shape of tungsten electrode end is an important factor for TIG.
Tungsten has high melting point, strong electron emission ability, high elastic modulus and low vapor pressure, so tungsten electrode was used as thermal electron emission material early.
The shape of
tungsten electrode
tip is an important factor for TIG.Characteristics of tungsten electrode:
Tungsten welding electrode
has excellent welding performance, great arc starting capacity with good arc stability, low electrode burning loss, long service life, free of slag and splashing and high welding quality.Tungsten electrode plays an important role in tungsten argon arc welding of arc, arc stability and welding quality.
Applications of tungsten electrode:
Tungsten electrode is used for inert gas protection arc welding, plasmacutting, spray-coating and furnace melting.
Surface conditions of tungsten electrode:
Grinding, cleaning, electrolysis polishing, drawing or forging.
Tungsten electrodes are used in the application scope of TIG welding.
Type, compositions and colors:
| Type | compositions | colors | |||
| added oxide% | substances | substances% | tungsten% | ||
| W | <0.20 | 99.8 | green | ||
| WT4 | 0.35--0.55 | THO2 | <0.20 | remaining | blue |
| WT10 | 0.8--1.20 | THO2 | <0.20 | remaining | yellow |
| WT20 | 1.70--2.20 | THO2 | <0.20 | remaining | red |
| WT30 | 2.80--3.20 | THO2 | <0.20 | remaining | violet |
| WT40 | 3.80--4.20 | THO2 | <0.20 | remaining | orange |
| WZ3 | 0.15--0.50 | ZrO2 | <0.20 | remaining | brown |
| WZ8 | 0.70--0.90 | ZrO2 | <0.20 | remaining | white |
| WL10 | 0.90--1.20 | LaO2 | <0.20 | remaining | black |
| WC20 | 1.80--2.20 | CeO2 | <0.20 | remaining | grey |
2. Specifications (mm)
| Diameter | Length |
| 1.0 | 150 175 |
| 1.6 | |
| 2.0 | |
| 2.4 | |
| 3.2 6.3 | |
| 4.0 8.0 | |
| 5.0 10.0 |
Zhengzhou Sanhui Co., Ltd also provides tungsten electrode grinder and can produce tungsten welding electrode and tungsten electrode according to the customers’drawing.
