Tungsten powder is pure tungsten in powder, apparent black powder. The regular tungsten powder fearture with 2~10um, 99.90% or 99.95%. Tungsten powder used as material for tungsten product usually.

According to medical experts, tungsten is a metal, tungsten and its compounds are toxic and low toxicity. Although HIV is not yet clear, but the tungstate can interfere with the body's normal metabolism of molybdenum;Contacting with tungsten powder can cause mild upper respiratory tract irritation, dry cough, dyspnea, fever, heart palpitations, dizziness, loss of appetite, and olfactory dysfunction and other symptoms.


 

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Characterization of Nanometer Tungsten Powder

Three types of nanometer tungsten powder were prepared by hydrogen reduction of three precursor powders at low temperatures, which were used as examples and were characterized by Brunauer-Emmer-Teller (BET) method, scanning electron microscopy (SEM) microscopy transmission electron microscopy (TEM), the scattering angle X-ray small (SAXS), issuing of the field of scanning electron microscopy (FESEM), respectively. The results showed that while SEM and BET would not characterize the size of dust particles of nanometers, they were important means to help to exclude (FESEM), respectively. no post-nanometer (FESEM), respectively . TEM and FESEM could directly measure the size of particle nanometers, but it needs much time to count the average particle size and size distribution. SAXS could not describe the state of agglomeration. Through a combination of FESEM and SAXS, the particle size, size distribution and particle shape of nanometer powders could be accurately characterized.

Characterization and application fields: nano tungsten powder can be used as additive materials for high density alloy and tungsten bar and wire, and as the matrix of superhard material, It also can be used as raw material for tungsten-rhenium alloy and tungsten carbide, and as the time-delay powder of safety explosive material, and as the combustible agent for explosive industry.

Packing: In sealed plastic bags with outer iron drums of 100/200 kgs net each.


 

钨产品生产商、供应商：中钨在线科技有限公司
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Tungsten carbide powder is the intermediate in the line from W powder to cemented carbides.  It can be produced from different raw materials and by different processes.  By far the biggest percentage is manufactured by the conventional method - carburization of tungsten powder - and covers the widest range of powder qualities in regard to average particle size (0.15–12µm).  All other methods in use yield very fine or very coarse powder grades.
The conventional process of carburisation comprises mixing of the respective tungsten powder of desired particle size with high purity carbon (lamp black or graphite) and reacting at temperatures between 1,300 to 1,600°C in hydrogen atmosphere.  The average particle size and particle size distribution of the original tungsten powder determine size and distribution of the WC powder.
The final carbon content of the WC Powder depends on the production mode of the hardmetal producer and is one item of the rigid specification, and varies from slightly sub-stoichiometric to stoichiometric (6.13% C) to slightly over-stoichiometric.  But not only is the carbon content specified but also a series of physical properties including: average particle size, particle size distribution, apparent (bulk) density and homogeneity.
High temperature carburised WC powders (1,700–2,200 °C) are usually coarse 10 to 50µm, but sometimes also 5 to 10µm grades are treated that way. The percentage of high temperature WC is small.
Tungsten Carbide Powder is often used to create hardmetals for cutting steel. Once mixed with cobalt and binder, tungsten carbide is pressed and sintered. Sintered tungsten carbide is one of the hardest substances known to man, and is used to cut steel, drill circuit boards and a multitude of other high tech applications in the automobile and aerospace industries, and beyond.

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Medium tungsten powder is pure tungsten powder with grain size of 2~10um and 99.95%. The most common grain size is 3~5µm.
W Content(% min) 99.95%
 
 Impurities(% max) Element Max
 Al 0.0010
 C 0.0030
 Ca 0.0020
 Cu 0.0010
 Fe 0.0030
 Mg 0.0010
 Mo 0.0020
 Ni 0.0020
 P 0.0010
 Si 0.0020
F.S.S.S 3-4um
Sample Price USD90.00/KG FOB XIAMEN,CHINA
Appearance of medium tungsten powder: dark grey powder, stable in dry air at room temperature.
Application of medium tungsten powder: medium tungsten powder is used as the material of tungsten carbide,contact alloy and high density shield ect.or used as the material of plasma spraying.
Packing:In iron drums lined with double plastic bags of 50 or 100 kgs net each.
Note:Any particular requirements to the products can be discussed.


 

钨产品生产商、供应商：中钨在线科技有限公司
产品详情查阅：http://www.chinatungsten.com
订购电话：0592-5129696 传真：0592-5129797
电子邮件：sales@chinatungsten.com
钨钼文库：http://i.chinatungsten.com
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