Production Processes of Tungsten Crucible

Tungsten crucible is one of the metal tungsten products. It can be divided into sintering, stamping and spinning type. Sintering tungsten crucible is mainly applied to the powder metallurgy technology. Stamping and spinning type of tungsten crucible is made of tungsten rod by turning, the size of this type of tungsten crucible is generally smaller than the ordinary one. Tungsten crucible can be used in vacuum inactive gas under 2600℃. Tungsten has a high boiling point, a high melting point, high temperature strength as well as a excellent anti-wear performance. In addition, its coefficient of thermal expansion is small and quenching degree is good. So, tungsten crucible is widely used in smelting of rare earth, quartz glass, electronic painting, crystal growth and other industries.

Generally, the first step of the production process of tungsten crucible is the preparation of tungsten powder and then sifting them. Because the thickness of the tungsten powder has some differences, and in order to meet the requirement of finished tungsten crucible product, users should separate coarse tungsten powder and thin tungsten powder from the mixed tungsten powder with a mesh. And then blending the different tungsten powder which has the same chemical composition together. And then placed it in a closed container which is filled with liquid. Put the same pressure gradually on each surface by supercharging system, so that it can reduce the distance to increase density of material and improve the physical properties of material without any shape-shift. After that, lathe the rough blanks and then put them into a medium frequency furnace for sintering. The next step is the lathing of competitive products. Finally, inspecting the finished product package.

Besides the usual production process, tungsten crucible can also be formed by the following production processes into various types, including sintering, forging, chemical deposition, plasma spraying, a spinning method, rivet linking and welding in according with the requirement of users. Users select a different preparation process to make different types of tungsten crucible. On the other hand, demand of tungsten crucible is increasing year by year, so that states should research and develop different production processes to meet changing market demands. With the rapid development of tungsten industry, researchers should constantly improve the production process of tungsten crucible. In addition, in the manufacturing process of the tungsten crucible, users should pay attention to its pollution and increase the utilization of raw materials to protect the environment.

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