Ferro tungsten belongs to the ferroalloy series (tungsten content: 70%-80%), is an alloy composed of tungsten and iron, tungsten is a silver gray metal. Atomic weight is 183.85. electronic structure 4f145d46s2. density (20 ℃) 19.3g/cm³.
Melting point 3400℃. Boiling point 5555℃. Tungsten and iron to form a solid solution and two intermetallic compounds Fe2W and Fe3W2 or Fe7W6, but at high temperatures are not stable. Containing W75% to 85% of the melting temperature of ferrotungsten is higher than 2500 ℃, so it can not be discharged from the furnace, can only be produced by accumulating lumps or taking iron method. The density of industrial ferrotungsten is about 15.3g/cm. ferrotungsten is used as an alloy additive in steel making. Commonly used ferrotungsten has two kinds of tungsten 70% and 80%.
