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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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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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.


 

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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.


 

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Tungsten carbide drill bit tool is one of tungsten carbide cutting tools. Drill bits may be solid tungsten carbide or tipped with it to provide the speed, accuracy and wear resistance required by machine shops and high-precision manufacturing applications. Construction professionals and amateurs buy similar bits that attach to hand power drills, drill presses and hobbyist rotary tools. Precision drill bit and grinding tools with tungsten carbide tips might be used for milling or sculpting metal as well as decorative carving of stone and precious gemstones. As materials scientist Dale Wittmer stated in a Southern Illinois University publication, "Tungsten carbide tools have been the standard for over 50 years in the mining industry."

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Ultrafine Tungsten Powder
Grade BET or F.s.s.s Oxygen% max<
GW02 >5.0㎡/g 0.80
GW04 4.0-5.0㎡/g 0.60%
GW05 0.5-0.6μm 0.55%
GW06 0.6-0.7μm 0.40
GW07 0.7-0.8μm 0.35
GW08 0.8-0.9μm 0.25

Ultrafine tungsten powder refers to tungsten powder whose grain size is under 2um.
 
Trace Elements for Powder Below 9.0um
Element Max Typical Element Max Typical Element Max Typical
Al 0.0010 0.0005 Fe 0.0050 0.0010 Pb 0.0003 0.0001
As 0.0010 0.0005 K 0.0015 0.0010 S 0.0010 0.0005
Bi 0.0003 0.0001 Mg 0.0010 0.0005 Sb 0.0005 0.0003
C 0.0030 0.0010 Mg 0.0010 0.0005 Si 0.0015 0.0010
Ca 0.0015 0.0006 Mn 0.0010 0.0005 Sn 0.0003 0.0001
Cd 0.0005 0.0001 Mo 0.0030 0.0016 Ti 0.0010 0.0005
Co 0.0010 0.0005 Na 0.0015 0.0007 V 0.0010 0.0005
Cr 0.0020 0.0010 Ni 0.0020 0.0010
Cu 0.0003 0.0001 P 0.0010 0.0005


 

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Tungsten carbide  reciprocating saw blade is one of tungsten carbide cutting tools. Tungsten carbide coats the edges of blades for reciprocating saws, such as jigsaws and demolition reciprocal saws. The back-and-forth sawing motion of these types of saws is well-suited for abrasion, and their coating of tungsten carbide grit allows them to grind through metals, ceramics and masonry. Applications include removing cast iron pipes and metal fasteners during demolition or cutting access holes through stone and tile during remodeling.

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Tungsten carbide circular saw blade is one of tungsten carbide cutting tools. Circular blades surrounded by sharp, tungsten carbide-tipped teeth can be found in factories for manufacturing, carpenters' tool kits for milling---and in the home, because do-it-yourselfers can buy them at hardware stores. Tungsten carbide circular saw blade is sized to fit not only in industrial machinery but also in standard table saws and hand-held circular saws. The most common tungsten carbide circular saw blade is not solid tungsten carbide; their body is typically tempered steel and only the cutting edges of the teeth are coated with tungsten carbide. A variation of the toothed saw blade is the grinding "wheel" or abrasive blade---still circular but without teeth. Their edge is coated with tungsten carbide and used to exert abrasive force as they grind through stone, ceramics and metal.

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The high quality and high purity fine tungsten powder are typically greater than 99.95% tungsten purity with average particle sizes up to 10 microns. These powders are used in powder metallurgy applications such as electrical contacts, heavy metal alloys, electronic heat sinks, mining tools and fabricated tungsten rod/bar.
Typical Physical Properties
Type AVG. Particle Size FSSS (microns) Apparent Density
(g/in3) Standard Screening
C3 0.60-0.99 20 - 40 -100 Mesh
C5 1.00-1.39 25 - 50 -100 Mesh
C6 1.40-1.99 30 - 60 -100 Mesh
C8 2.00-3.99 35 - 70 -200 Mesh
C10 4.00-5.99 40 - 80 -200 Mesh
C20 6.00-9.99 50 - 90 -200 Mesh

Typical Trace Element Chemical Analysis
Metallic Impurities (WT%)
Element  Max  Typical  Element  Max Typical
Al 0.003 <0.001 Mo 0.020 0.005
Co 0.005 <0.001 Na 0.010 0.005
Cr 0.020 0.005 Ni 0.020 0.005
Cu 0.005 <0.001 Si 0.002 <0.001
Fe 0.020 0.002 Sn 0.002 <0.001
Non-Metallic Impurity (WT%)
Type Carbon Oxygen(Loss on Reduction)
C40 <0.008 <0.070
C60 <0.008 <0.070
C80 <0.008 <0.070
TUNGSTEN (WT%) > 99.8% Excluding Gases

Analytical Report
A Certificate of Analysis (COA) accompanies each shipment of tungsten carbide powder. We prepare each COA to include the following:
Average Particle Size (Fisher Sub-Sieve ASTM B-330)
Apparent Density (Scott Volumeter ASTM B-329) ]
Particle Size Distribution (Photelometer ASTM B-430, Sedigraph, or Malvern Mastersizer)
Chemical Impurity Analysis


 

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