Rare earth tungsten electrode is a tungsten alloy strip made of refractory metal tungsten as the main raw material, mixed with about 0.3%-5% of rare earth elements such as cerium, thorium, lanthanum, zirconium, yttrium, etc. through powder metallurgy. Made by pressure processing. The tungsten content is about 85%, and the rare earth content such as thorium, lanthanum, cerium, zirconium, and samarium totals about 15%. It is mainly used for AC arc melting and is not suitable for DC melting.
Rare earth tungsten electrode is a special tungsten alloy material. It uses tungsten as the main component and is made by powder metallurgy by adding rare earth elements such as cerium, thorium, lanthanum, zirconium, yttrium, etc. This electrode material has some unique physical and chemical properties that allow it to exhibit excellent performance in high-temperature applications such as arc melting.
Physical properties:
High density: The density of rare earth tungsten electrodes is lower than that of pure tungsten, reaching 17.5-18.5g/cm³.
Small thermal expansion coefficient: At high temperatures, its thermal expansion coefficient is smaller than that of pure tungsten, which helps reduce dimensional changes caused by temperature changes and improves the stability of the electrode.
Good thermal conductivity: Rare earth tungsten electrodes have good thermal conductivity and can conduct heat quickly, making the arc more stable.
Chemical properties:
Corrosion resistance: Rare earth tungsten electrodes have good corrosion resistance at high temperatures and can resist chemical attack during the smelting process.
Good conductivity: Rare earth tungsten electrodes have higher conductivity than pure tungsten, which helps reduce arc resistance and improve arc stability.
Application areas:
AC arc melting: Rare earth tungsten electrodes are mainly used for AC arc melting. They can maintain a stable arc at high temperatures and improve melting efficiency.
Electron beam melting: During the electron beam melting process, rare earth tungsten electrodes also show good performance and can withstand the impact of high-energy electron beams.
Other high-temperature applications: In addition to the smelting field, rare earth tungsten electrodes can also be used in other high-temperature applications, such as electronic packaging, aerospace, etc.
In short, rare earth tungsten electrode is a high-temperature material with excellent properties and is mainly used in fields such as AC arc melting. Its high density, good thermal conductivity and chemical stability make it excellent in high temperature applications.
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