The physical properties of APT sample prepared in our research were measured in comparison with some commercial APT samples produced by traditional APT samples produced by traditional method. It has been observed that the APT sample using our method has a shape nearly regular cubic crystal and even particle size, while the commercial samples have relatively bad regularity, besides some cubic crystals, there are some topical tabular crystals and some rod-like crystals, and the particle size distribution is uneven.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Agitation can promote the relative movement between solid and liquid, and make the concentration and the temperature in the solution even. Moreover is also favorable for crystalline grains growing evenly in all directions, so coarse grains with large apparent density can been obtained. The crystalline grains may be fined when the speed of agitation is very great. For this reason, experiments of two different kinds of agitation, mechanical agitation and air agitation, has been carried out. The experiments indicate that the apparent density of APT crystals obtained by air agitation is usually coarser than that obtained by mechanical agitation. This may be because the mechanical action upon the crystal caused by air flow is weaker than that caused by mechanical agitation.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

As well-known, the addition of seed crystal, especially active seed crystal, is usually favorable for restraining the formation of new nuclei and promoting the growth of crystalline grains during crystallization. A series of experiments have been made using active APT crystal prepared under special conditions as seeds. It can be seen that with the same experimental conditions, the apparent density of APT crystal made by seed crystal is coarser than that produced without seed crystal.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

The concentration of WO3 directly influences the over –saturation of the solution which has an important effect upon both the speed of nucleation and crystal growth. It is show that the higher the concentration of WO3, the larger the over-saturation of the solution, the smaller the APT crystal obtained. We have observed with microscope that the crystal obtained of WO3 has three shapes agglomerates of small cubic particles; needle crystals and tabular –like. This is because in the high over-saturation (NH4)2WO3 aqueous, the supply of APT solute for APT crystalline grains growing is uneven, so that on the active centers of the crystal-edges and the crystal pinpoints, there are more chances to receive APT solute for growing rapidly. Therefore, the needle crystals and tabular-like crystals are formed easily.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Puring the crystallization of APT crystals, temperature has double effects on APT crystals. On the one hand, rising temperature will increase the growth rate of the crystalline grains, and help to make coarse grain APT. On the other hand, higher temperature will lead to rapid volatilization of NH3 and cause the over- saturation of the solution ,and a large amount of nuclei were formed. In this case coarse grain crystals can not be obtained. Therefore , it is necessary to find out which effect on APT crystals plays a dominant role in the crystallization process of APT.

Solution with different initial concentrations of (NH4)2WO4 were used for studying the influence of temperature on the apparent density and FSSS size. The results show the apparent density and FSSS size increase obviously with the raising of temperature, and APT crystals with an density more than 1.8g/m-3 and a FSSS size more than 32 um are obtained at temperature higher than 90℃. This is because at higher temperature, the activity of the active center on the surface of crystalline grains increases, and the rate of nucleating is slower than that of crystal growing. It was clearly observed through a microscope that the APT crystals made at higher temperature are coarser than that obtained at lower temperature.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Once upon a time well, beginners chose nice brass darts! It is strongly recommended that buy tungsten darts in the marketing darts.

The reason one is that tungsten darts is a long-lasting tungsten dart. Now it become better, you will often run into darts The third is stuck before. Because the same metal with each other, absolutely and scraping to, you will be to continue to wear. For those of tungsten is much more durable than brass I will last longer.

The reason two that shape is rich. In the current darts world, choices are rich because of the overwhelming mainstream people of tungsten. I will be easier to find what suits your feeling.

Tungsten darts are thinner ,it can make for brass darts that would have been absolutely made thick large in relation to specific gravity, is often get in the way when you aim the same location. This is the story of a millimeter Once in diameter, but you have actually throw the moment affect large difference.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Darts in the United States dates back to the Puritan origins period. These colonists by Darts spent their journey in the Mayflower. Like horseshoe throwing games, dart games soon became popular in American leisure time, also many people never heard tungsten. Actually, have been used familiar, you has been used in the filament of an incandescent light bulb.

 Tungsten darts will last longer and difficult to scrape.Large specific gravity than the brass darts, is also very hard to metal that since the size small and is located in the supplement tends. In addition, it will last longer because it is difficult to scrape a very durable.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Traditionally, dartboards have been constructed of wood, usually elm or popular. Both are soft woods and are thus easy to cut and shape and to receive the incoming darts.

Nowadays, the bristle dartboard is popular among top players. Bristle dartboard spent a long time to developments, as it was known, was long-lasting, did not need soaking and was more resistant to damage by darts than the elm or poplar dartboard. In addition, with the bristle dartboard, when darts were removed from the dartboard, the sisal fiber closed the hole behind it.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

The events of dart sports in the further development of China has played a significant role in promoting, in many areas, such as Beijing, Tianjin and other places have set up darts sports organizations, regularly organize various competitions each year. In short, darts sport in our country in the ascendant, the number of participants of this sport more and more, our darts levels will continue to improve.

Darts sports in China is an emerging sport, people love it just as much as some of the popular sports. CCTV's "Holiday Sports" column regularly broadcast live video of international darts tournament, darts enthusiasts to the general good learning opportunities. Through live video, viewers learn more about the state of the world darts, watch the darts players between high levels of intense, fantastic game. Bars and places of leisure but also for the city's sports venues darts enthusiasts.

On the other hand, due to the darts have this characteristic civilians, it quickly into the household, became a family fitness and recreation major sporting events.

In order to promote national fitness campaign in China in depth, further popularize dart sports, in May 1999 the State Sports Administrative Guidance Center announces the darts sport as an official sport, which marks the darts sport in China has been recognized as a veritable sports.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

The extremely sharp and smooth enough neat tungsten carbide cutting tools edge machining to have a specific, smooth shape, and edge rounding mostly waterfall edge, this process is called edge passivation. China is a big manufacturing country, continuous consumption of tungsten carbide cutting tools in the world, however, the domestic production of tools, as compared with the import tool in terms of performance and life, there is a big gap. CNC machine tools used in the production line or from abroad, which have all been passivated edge, greatly reducing the cost of the tool, but also brought huge economic benefits.

Tungsten carbide cutting tools material, geometry, structure and cutting the amount of influence and decision tool life. Good tungsten carbide cutting tools edge passivation types and can also improve the quality of life of the tool. Therefore, the situation is good or bad is the tool edge can not be ignored. With the improvement of the accuracy of the tool, stability requirements, and its importance will be more prominent. The passivation process is the elimination of edge defects in the cutting edge of the cutting edge and the passivation process, can improve the stability of the cutting tool, the tool to increase reliability and improve the surface quality. Edge roughness of cutting edge passivation changed the geometry of the cutting tool, cutting edge micro-topography and near the surface of the tool cutting edge. Reasonable edge passivation treatment can increase the strength of the cutting edge, to reduce chipping, eliminate the original defect of the cutting edge, increasing the tungsten carbide cutting tools life, and can provide a good tool for surface coating.




Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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