What is ferro tungsten used for?
Tungsten is silvery white and has a melting point as high as 3400°C, making it the metal with the highest melting point. The density is 19.3 g/cm3. It is 2.5 times stronger than steel and equivalent to gold. Tungsten has good electrical conductivity and its electrical conductivity is higher than nickel, iron, phosphor bronze, and platinum.
Tungsten has a smaller coefficient of expansion. Tungsten is relatively stable at room temperature. When the temperature is not high, brown and dark blue oxide films are formed on the surface. At higher temperatures, tungsten trioxide is violently oxidized to form tungsten trioxide. When the temperature exceeds 2000°C, tungsten and nitrogen react to form tungsten nitride. Tungsten does not work with hydrogen.
At high temperatures, tungsten reacts with carbon and some carbon-containing gases to form hard and refractory carbides with important industrial value. Tungsten has good corrosion resistance and is insensitive to acids and alkalis of any concentration at room temperature. However, it can be quickly dissolved in a mixture of hydronitric acid and concentrated nitric acid and will dissolve in oxidizing molten salts (such as sodium nitrate, etc.) Severe corrosion. The main minerals are wolframite and scheelite.
The uses of tungsten are determined by its special physical and chemical properties. The current uses are mainly concentrated in cemented carbide, ferrotungsten, tungsten processing materials, tungsten chemicals, and new tungsten materials.
The uses of tungsten are still expanding. For example, it is used as an anti-oxidation coating in high-temperature metallurgy; in the aerospace industry, it is used as a rocket nozzle, nozzle, and thermal dissociator for ion rocket engines; in nuclear engineering, tungsten is used as a container for holding liquid metal. Thermal ion exchanger, etc.
