Tungsten crucible is one of deep processing of tungsten products, so it owns the properties of tungsten (high melting point, high boiling point, wear resistance, corrosion resistance, good thermal conductivity, good conductivity, good harden ability, low expansion characteristics at high temperatures, etc.).

Its molding type can be divided into the following types: sintering molding, welding molding, pressing molding, spinning molding. Or turning molding by using tungsten rod (generally its relatively size is small), etc., or the use of pure tungsten plate, tungsten sheet and pure tungsten rod processing through the appropriate process form. Tungsten crucible is used in the conditions that it is in vacuum, in inert gas, and the temperature is below 2600℃. Tungsten crucible is widely applied in quartz glass, rare earth smelting, electronics coating, crystal growth and other industries.


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Wear phenomena on tungsten carbide buttons tested in percussive drilling of Kiruna-magnetite under realistic conditions have been studied with scanning electron microscopy, light optical microscopy and energy dispersive X-ray spectroscopy. In addition, a comprehensive literature study has been performed. The aim has been to chart wear phenomena, such as crack formation, occurrence of reptile skin and various wear mechanisms.

It is shown that surface cracks form shortly after drilling has started. Also the valleys and plateaus characterizing the reptile skin pattern were found after only short drilling periods. It appears that the formation of the initial surface cracks and the reptile skin pattern are separate mechanisms, which presumably interact. In addition to the formation of cracks, there is also a continuous wear of the buttons. This is assumed to be caused by wear fracturing and pullout of tungsten carbide (WC) grains or wearing of cobalt (Co) by abrasion.


Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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Tungsten carbide button bit is also called cemented carbide button bit. It has many advantages like good wearing resistance, high abrasion resistance, high corrosion resistance, high tenacity, high temperature resistance, high hardness and high density. Tungsten carbide button bits have a thin metal blade or disk with a sharp, usually toothed edge. Tungsten carbide button bits are used for cutting wood, metal, or other hard materials. They can be hand-operated or power-driven. Tungsten carbide button bits are used in surface processing of cast irons, nonferrous metal and alloys, as well as nonmetal materials for hard metal, carbide rough turn, rough planning, and precision milling.

Tungsten carbide road digging button bits are used to mining the road. It can be used to reduce wear on rubbing surfaces found in roller cone drill bits, diamond bits, down-hole stabilizers, and numerous other applications.


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In U.S. Pat. No. 4,743,515, tungsten carbide buttons are disclosed with a core of finely and evenly distributed eta-phase embedded in the normal alpha+beta-phase structure, and a surrounding surface zone of only alpha+beta-phase. (alpha=tungsten carbide, beta=metal binder, e.g., Co, and eta=M₆ C, M₁₂ C and other carbides, e.g., Co₃ W₃ C). In the inner part of the surface zone situated close to the core of that body, the Co-content is higher than the nominal content of Co. The Co-content in the outermost part of the surface zone is lower than the nominal and increases in the direction towards the core up to a maximum usually at the eta-phase core.

Tungsten carbide button for rock drilling comprises a core and a surface zone surrounding the core whereby both the surface zone and the core contains WC (alpha-phase) and a binder phase based on at least one of Co, Ni, or Fe and the core in addition contains eta-phase. The eta-phase core extends to the very top (working) surface of the button and as a result is obtained longer life and higher drilling rate particularly for rotating crushing drilling, cutting drilling and percussive drilling in soft rocks.


Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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