Zirconium Tungsten Electrode

Zirconium tungsten electrode (WZr electrode) is a welding material, which is a composite electrode made of two metals, zirconium and tungsten. It contains a small amount of zirconium oxide (ZrO2). Zirconium mainly plays the role of enhancing oxidation and eliminating grain boundary defects, while tungsten is used to improve the tensile strength and dimensional stability of the material. This electrode can effectively work stably at high temperatures due to its high melting point and low evaporation rate, and will not be damaged by corrosive substances in the working environment.

The development of WZr electrode is to improve the disadvantage that pure tungsten electrode is easy to melt and contaminate the workpiece under high-load welding conditions.

In AC welding, WZr electrode is the most commonly used, because it is easier to start an arc than pure tungsten during welding, and the arc beam is stable. It can also prevent pollution well and has good current carrying capacity. From the perspective of performance, it is generally the best non-radioactive tungsten electrode.

Luoyang Rare Metal Research Material Co.,Ltd can provide various kinds of tungsten electrodes for tig welding. We have a large quantity of goods in stock for regular specifications, we can also provide customization service. 

The common brand names of zirconium tungsten electrodes include WZ3 and WZ8.

Among them, the oxide zirconium (ZrO2) content of WZ3 is 0.2-0.4%, and the color code tip is brown; 

The oxide zirconium content (ZrO2) of WZ8 is 0.7-0.9%, and the color code tip is white.

Zirconium tungsten electrodes have the following characteristics:

- Stable operation at high temperatures:

Due to the material composition and structural design of WZr electrodes, they can maintain their structure unchanged at high temperatures, thus working stably.

- Corrosion resistance:

The surface of zirconium tungsten electrode can produce a slow and appropriate reaction with oxides, which makes them corrosion resistant.

- Excellent arc stability:

Zirconia enhances electron emission capability and reduces arc drift.

- High hardness:

They are widely used in cutting and welding fields due to their high hardness.

- Long service life:

When using WZr tungsten electrodes, machine downtime can be reduced and production can be increased. At the same time, due to the long service life of WZr tungsten electrodes, the frequency of electrode replacement can be reduced, thereby saving costs.

- The biggest feature of this electrode is:

Under high load current, during welding, the end of this electrode can remain in a spherical shape to reduce tungsten permeation and has good corrosion resistance. They are mainly used for AC welding of magnesium, aluminum and their alloys.

1) AC welding:

Zirconium tungsten electrode are often used in AC welding environments because of their excellent welding performance and corrosion resistance.

2) High load current conditions:

In this case, the end of the WZr tungsten electrode can remain in a spherical shape, reducing tungsten permeation, which makes it have superior performance under high load current.

3) Welding of magnesium, aluminum and their alloys:

WZr tungsten electrodes are particularly suitable for AC welding of magnesium and aluminum alloys because they can provide a stable arc and good welding quality when welding these materials.

4) X-ray high-quality welding:

They are also used in X-ray high-quality welding applications that require minimal tungsten contamination.

5) Special smelting and welding of high-temperature alloy materials:

Because they have a high melting point and good high-temperature strength, they are suitable for melting and welding of high-temperature alloy materials in fields such as aerospace and nuclear industries.

- Current matching:

Recommended for alternating current (AC) environments. Its performance under DC may be inferior to other types. 

- Tip treatment:

During AC welding, the electrode tip needs to be ground into a spherical shape to optimize the arc.

- Storage protection:

Avoid contamination and keep the surface clean to prevent welding defects.

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