The types of rare earth tungsten electrodes are mainly divided according to different tungsten materials, including pure tungsten electrodes, lanthanum tungsten electrodes, cerium tungsten electrodes, thoriated tungsten electrodes, yttrium tungsten electrodes, zirconium tungsten electrodes, silver tungsten electrodes and composite tungsten electrodes.
- Pure tungsten electrode: The tip color of pure tungsten electrode is gray. It has high density, high thermal conductivity, and good corrosion resistance and electrical conductivity. It is mainly used for AC arc melting and is not suitable for DC melting.
- Lanthanum-tungsten electrode: The tip color of the lanthanum-tungsten electrode is golden yellow. It has high arc starting performance and good arc column stability, and is mainly used for AC welding.
- Cerium-tungsten electrode: The tip color of the cerium-tungsten electrode is sky blue. It has good ductility and creep resistance and is mainly used for DC welding.
- Thoriated tungsten electrode: The tip color of the thoriated tungsten electrode is black. It has a high melting point and good electrical conductivity and is mainly used for AC welding.
- Yttrium-tungsten electrode: The tip color of the yttrium-tungsten electrode is blue. It has a high melting point, low evaporation rate and good chemical stability, and is mainly used in electron beam melting and heating elements of high-temperature furnaces.
- Zirconium tungsten electrode: The tip color of zirconium tungsten electrode is off-white. It has high strength, high hardness and good corrosion resistance, and is mainly used as heating elements for high-temperature furnaces in the nuclear industry.
- Silver tungsten electrode: The tip color of the silver tungsten electrode is white. It has high conductivity and good corrosion resistance, and is mainly used for packaging and welding of electronic devices.
- Composite tungsten electrode: Composite tungsten electrode is an electrode material composed of two or more metal or non-metal elements. The color of its tip is related to the added elements. It has the advantages of high melting point, low evaporation rate, good chemical stability and high electrical conductivity. It is widely used in the packaging and welding of heating elements of various high-temperature furnaces and electronic devices.
The above are the main types and characteristics of rare earth tungsten electrodes. Choosing appropriate electrode materials can greatly improve welding efficiency and product quality.
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