Tungsten Darts Threads

The tungsten darts threads  are called "2BA" which follows a British norm. Older brass darts often have a 1/4 inch thread. These two  tungsten threads dart are not compatible. 1/4 inch tungsten darts threads are as ancient as brass darts are, so there usually is no need to worry about that when buying a tungsten threads dart. Standard shafts or soft/movable tips you buy are equipped with the 2BA thread, so problems with incompatibility of the threads should not occur.

However, there are some pitfalls. Some dart manufacturers supply darts with "alternative" attachment methods. machine.Heads is such an example. The shaft of this dart isn't attached with a tungsten darts threads, it is attached through just a thin whole and a rubber tube to fix it. This system is unique -- as good or as bad as the thread system, but you have to take into account that for shafts for this system you will have to rely on the manufacturer. For other companies supplying a shaft only for such special series is not economical.

Tungsten darts threads easy to manufacture.Another company are using the 2BA thread, but the outside measures of their tungsten darts threads flight ends are slightly bigger than those from other manufacturers. This means that shafts won't give a plain cut between dart and shaft on darts. The shaft will slightly jut out on any other dart. Of course all other shafts will be slightly thinner than the barrel if attached to a dart.

The bottom line is, if you are buying a new dart take your old spare parts with you to see if you can use them on your new dart. If you buy your first dart set, try to attach the cheap standard spare parts of the shop to this dart, not the ones that are shipped with the tungsten darts threads when you open the box.


 

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Tungsten Dart Billet and Titanium Dart Billet

Tungsten Dart Billet

Tungsten is a very dense material, so darts with a considerable weight can be made slim.Billets are actually tungsten cylinder rods after surface grinding by center-less processing, and their weights are varied from different tungsten contents and rod sizes. Tungsten is used in dart production because of its high weight to volume ratio. The higher percentage of tungsten used to make a dart which is the slimmer and sleeker. Tungsten billet is the raw material of barrel which forms the main part of tungsten dart.

Nowadays, lots of people are like to buy the tungsten very much, because of there are advantage for using.

The higher the percentage, the slimmer the dart will be, resulting in increased higher scoring chances. A90 % tungsten darts will be slimmer than an 80 %.

Tungsten – Titanium dart billet.

The dart billet made by tungsten-titanium, this is tungsten darts with titanium . This is the most expensive darts on the market today.
The titanium dart makes the darts harder, better gripping and it's worth a try.

 

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Brass Darts Billet and Chrome Dart Billet

Brass darts billet
The dart billet made by brass, this type of darts is cheap and can be a good investment when you start throwing darts. You can try out different shapes, weights and it does not cost as much as nickel and tungsten darts. It's also available in most designs torpedo, cylinder etc.

Chrome Dart Billet
The dart billet made by messing-chrome, this is messing darts with chrome alloy and the darts have some better grip. This type of darts is often used by advanced players. The barrels are a little bit smaller than regular brass darts.

 

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Violet Tungsten Oxide Nano Powders

1. Product Name: WO3-x
2. Particle size:50-60nm
3. Purity: 99.9%
4. Appearance: Violet powder, the color depend on its tightness of oxygen index particles and the L/D ratio of the needle (SEM)
 
Violet tungsten oxide is a finely divided violet crystalline powder. It is produced by rotary calcining ammonium paratungstate at closely controlled temperatures in a reducing atmosphere. Violet tungsten oxide is used primarily for the production of tungsten metal powder and tungsten carbide.
 
Violet tungsten oxide nano powders is made from ammonium paratungstate (APT), The smaller the particle size of the raw material is,  the smaller particle size of the violet tungsten produced is. Violet tungsten oxide is important material of manufacting super-fine tungsten powders and tungsten carbide nano powders.
 
 
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Tungsten Darts Billet and Chrome Dart Billet

Tungsten – Dart Billet

Nowadays, tungsten-based billet is widely used as the standard barrel material, for it has a specific gravity of 19.3(20℃), making it a very dense material with small volume. Besides, it has superior wearing resistance. The dart billet made by tungsten, today tungsten darts is used by most professionals; the barrels have a slim design and are made for great grouping in the dartboard. When you buy a set of tungsten darts billet ,it's often 80% tungsten and up to 97% tungsten the higher the percent is the thinner the barrels are, and of course higher price.

Chrome Dart Billet
The dart billet made by messing-chrome, this is messing darts with chrome alloy and the darts have some better grip. This type of darts is often used by advanced players. The barrels are a little bit smaller than regular brass darts.

 

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Tungsten Oxides Colours (IV)

Colours can also change with the temperature of the material due to alterations in the reflectivity of the oxides. Thermochromism is the property of substances to change colour due to a change in temperature and WO3 is an attractive example for this property. On cooling the oxide by liquid nitrogen down to -196°C, a sudden change occurs from yellow to white, which then alters to a bluishwhite colour between -50 and -27°C. At room temperature it becomes pale lemon-yellow again. On further heating to 200-300°C, WO3 becomes dark yellow, changing to a deep orange colour at 400 to 500°C. These reversible colour changes are linked to changes in the electronic properties of WO3 which alter due to changes of the internal symmetry of the WO3 crystals (through alterations of the lattice arrangements).
colours, tungsten oxides
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Tungsten Dart Billet

Tungsten is a very dense material, so darts with a considerable weight can be made slim.Billets are actually tungsten cylinder rods after surface grinding by center-less processing, and their weights are varied from different tungsten contents and rod sizes. Tungsten is used in dart production because of its high weight to volume ratio. The higher percentage of tungsten used to make a dart which is the slimmer and sleeker. Tungsten billet is the raw material of barrel which forms the main part of tungsten dart.

Nowadays, lots of people are like to buy the tungsten dart billet very much, because of there are advantage for using.

The higher the percentage, the slimmer the dart will be, resulting in increased higher scoring chances. A 90 % tungsten darts will be slimmer than an 80 % with the same weight and length.

 

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
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Tungsten Oxides Colours (III)

The colours of the tungsten oxides are a result of the fact that the absorption and emission of photons (light) are dependent on wavelength. If the material has a low reflectivity at the short wavelength end of the spectrum (460-480 nm) it appears yellow to orange, because only the green and yellow part of the light is reflected. If it has a low reflectivity at the long wavelength end of the spectrum (550-700 nm), it appears blue or violet. If all components of the white light are absorbed and not re-emitted, the material appears black.
 
Colours can significantly change with different valence states within an oxide structure, although the parent structure of differently coloured oxides basically appears the same (due to changes in absorption and reflection and/or transmission). Inherent colours also change with the size of the particles, and the colours of powders therefore can significantly differ from those of single crystals. Thin films of tungsten trioxide are even transparent, but can be readily coloured by impurities which are used today for electronic devices.
 
 
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Tungsten Oxides Colours (II)

Stoichiometric compounds such as W20O58, W18O49 or WO2 are formed intermediately during the reduction process and can be isolated by interrupting the reduction process at the selected reduction state.
 
All , characteristic crystal symmetries, and also peculiar crystal forms. They are commonly not visible to the naked eye, as the powder particles are too small for a simple visual detection.
 
However, they can be made visible by looking at the powders with the help of an electron microscope where distinct differences of the crystal forms can be clearly recognised.
tungsten oxides‘ different colours
Colours of the tungsten oxides, prepared by interrupting the reduction process at selected reduction stages: yellow WO3, blue W20O58, violet W18O49, chocolate-brown WO2, and grey W metal.
 
 
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Extracting Ammonium Maratungstate by Solvent

Solvent extraction is besed on ammonium tungstate solution of the ester (D2EHPA) or tributyl phosphate (TBP) and kerosene solvent composition of the organic phase with an organic extractant di (2-ethylhexyl), and extracted ammonium tungstate in an ammonium ion, so that Ph value to 2 to 4, generated by digestion of ammonium metatungstate solution. Concentrated crystallization, filtration separation, drying products.

 

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