Tungsten carbide is a material developed for highly demanding applications. The unique combination of hardness and toughness makes it especially suitable for wear resistant parts of tools for rock drilling.

Tungsten carbide rock drill buttons wear resistance has been the focus of numerous studies, and a large amount of wear data has been published. However, the broad range of possible wear mechanisms, the large number of rock types of very different character, and finally the large local property variations even within a single drill hole, has made it difficult to sort out a good general understanding. One conclusion stands out very clear: the wear data for one rock drill in one rock type is unique to that particular situation and should not be expected to apply to other rock drills in other rock types. Even so, some general wear mechanisms can be observed.



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Tungsten crucible sintering process:
Sintering in the medium frequency induction furnace, and the temperature is controlled at: 2200 ℃ -2250 ℃ around, and should be held 3h-5h. Thermal insulating once again in the middle-temperature phase, the control of temperature is around 1600 ℃ -1700 ℃, time thermal insulation is around 1.5h, so densification of product will be better . Moreover, heating temperature speed should not too fast, otherwise the crucible is easy to deform, and the temperature should be controlled at: 80℃-100℃around. Besides, the vacuum degree should be bigger than 0.67Pa when sintering.

In addition, through matting the same material tungsten plate at the bottom of the crucible or installing the furnace by proper way, and it will be possible to avoid the situation in which the sintering tungsten crucible bottom will crack, making the quality of tungsten crucible is guaranteed. By this sintering process, tungsten crucible density can reach to 17.3g / cm³ and above.


Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
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Tungsten carbide rock drill buttons wear mechanisms have been the focus of numerous studies, and a large amount of wear data has been published. Recently a new, more comprehensive, view on the deterioration and wear mechanisms of cemented carbide rock drill buttons comes up. The new view combines some of most important aspects, including two life limiting factors, five classes of mechanisms of deterioration and five classes of material removal mechanisms. The view is based on careful high resolution investigations of worn tungsten carbide rock drill buttons selected from drilling of different rock types.

The deterioration includes a fundamental change of material and properties due to intermixing of rock material and cemented carbide in the surface layer of the button. It further includes corrosive decay and oxidation of WC and formation of large-scale cracks in a reptile skin pattern.



Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
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Tungsten crucible, also called tungsten melting pot, which owns different types, such as, spinning molding type, sintering molding type, pressing molding type, welding molding type and the type made by car molding, and so on. Tungsten crucible working environment of temperature is above 2000℃.

Tungsten crucible application:
Thanks to tungsten’s high melting point, tungsten crucible, as a core container, is widely applied in sapphire growth furnace, single crystal furnace, quartz glass melting furnace, induction furnace, rare earth melting furnace and other furnaces. In the sapphire crystal growth furnace process, the following features of tungsten crucible will affect the success ratio of seed growth, quality and service life of sapphire crystal.

Tungsten crucible feature: high purity, high density, wear resistance, high melting, corrosion resistance, no crack and other features.

Tungsten crucible is also playing an important part in glass and ceramic manufacturing, powder metallurgy industry, machinery processing and other industries.


Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
 Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
 Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
 Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn