Zirconiated tungsten electrodes are an electrode material used in TIG (tungsten arc welding) and GTAW (gas tungsten arc welding) processes. It is made of an alloy of tungsten and zirconium, which makes it more heat-resistant and stronger than pure tungsten electrodes. It has excellent arc stability and better arc starting performance during welding, and it is also less prone to oxidation or corrosion than electrodes made of other materials. Zirconium tungsten electrodes can be used to weld various metals such as titanium alloys, magnesium alloys, copper alloys, and nickel alloys.
1. Technical Data
Zirconium tungsten electrodes are electrodes for TIG welding, manual arc welding, and plasma cutting. The following are its chemical and physical properties:
Physical properties
- Density: 5.4-5.5g/cm³
- Tensile strength: 1500-1900MPa
- Bending strength: 1350-1750MPa
- Conductivity: 16.3-18.1μΩ·cm
- Melting point: 3422°C
- Coefficient of thermal expansion: 4.9×10^-6/℃
In general, zirconiated tungsten electrodes have oxidation resistance, high strength, and good electrical conductivity, and are suitable for argon arc welding, manual arc welding, and plasma cutting work in high-temperature environments.
2. Manufacture processes
The following is the production process of zirconium tungsten electrodes
1) Material preparation: Prepare high-purity zirconium powder, tungsten powder, and other chemical substances that need to be added, such as soil, oxides, and carbon.
2) Mixing: Mix the required materials in a certain proportion and add enough adhesive. The mixture can be processed in a ball mill or dried in a drying room.
3) Making electrodes: Compress the mixture into the desired shape, and then sinter the crucible or heat it at high temperature to get the electrode.
4) Grinding: Grinding the electrodes precisely. This is an important step as it determines the surface finish and dimensional accuracy of the electrodes.
5) Coating: apply special coating material on the electrode surface to improve its service life and welding performance.
3. Working principle
The above is the production process of zirconiated tungsten electrodes. This process requires very strict quality control and testing to ensure that the output products can meet the relevant standards and customer needs.
Zirconium tungsten electrodes work by utilizing their high melting point and low electron emission power to achieve arc maintenance and stabilization. This electrode is composed of pure tungsten and zirconium, and zirconium is used as an additive to improve the thermal stability and electron emission power of tungsten electrodes, making them more resistant to friction and high temperature.
When this electrode contacts the surface of the workpiece, due to its high melting point and low electron emission power, it can generate a stable arc at high temperatures, thereby heating the surface of the workpiece to a sufficient temperature to melt or fuse it. Compared with other tungsten electrodes, tungsten electrodes have better heat resistance and arc stability and can maintain a stable arc under high voltage and high current. This makes them useful in many welding and cutting applications.
4. Application Fields
zirconiated tungsten electrodes (Zr-W) are typically used in high-temperature applications, i.e. where long periods of stable arc welding and cutting operations are required, and where high-quality welds are required. The following are the application fields of Zr-W electrodes:
- Aerospace industry: In the aerospace industry, Zr-W electrodes are required to weld components such as aerospace engines, missiles, aerospace vehicles, and other high-temperature equipment.
- Chemical industry: Zr-W electrodes can be used for welding and cutting in petrochemical, chemical, and other high-temperature processes.
- Medical industry: Zr-W electrodes are used in the production of medical equipment and surgical instruments.
- Semiconductor industry: In the semiconductor production process, Zr-W electrodes can be used for welding and cutting.
- Nuclear industry: Zr-W electrodes can be used for welding and cutting in nuclear power plants and other nuclear industry equipment.
In summary, Zr-W electrodes are mainly used in applications that require high-temperature resistance and high-quality welding and cutting.
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