How to choose the diameter of tungsten wire?
The diameter of the tungsten wire needs to be determined according to the specific application scenario. Generally speaking, the finer the diameter, the less wear and tear the tungsten wire will have, but the load-bearing capacity and service life will correspondingly decrease. Therefore, it is necessary to choose according to specific needs.
What impact does the material of tungsten wire have on its application?
The material of tungsten wire has a significant impact on its application. Pure tungsten has better high-temperature strength and corrosion resistance than tungsten alloy. Therefore, in situations where high purity and high corrosion resistance are required, it is recommended to choose pure tungsten wire; Tungsten alloy has better strength and ductility, making it suitable for certain special applications such as spark machining, vacuum electronic equipment, and other fields.
Why does tungsten wire not break easily in vacuum but easily in air?
The melting time of tungsten wire heated in vacuum depends on the evaporation rate of tungsten. And the heating of tungsten wire in air produces tungsten oxide. The melting point of tungsten is 3410 degrees. The melting point of tungsten oxide, WO3, is 1400-1600 degrees. Under normal working conditions, the temperature of the filament is around 2500 degrees, and WO3 rapidly vaporizes at this temperature, causing the filament to quickly melt in the air.