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."

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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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.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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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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Sintered tungsten carbide cutting tools are very abrasion resistant and can also withstand higher temperatures than standard high speed steel tools. Carbide cutting surfaces are often used for machining through materials such as carbon steel or stainless steel, as well as in situations where other tools would wear away, such as high-quantity production runs. Because carbide tools maintain a sharp cutting edge better than other tools, they generally produce a better finish on parts, and their temperature resistance allows faster machining. The material is usually called cemented carbide, hardmetal or tungsten-carbide cobalt: it is a metal matrix composite where tungsten carbide particles are the aggregate and metallic cobalt serves as the matrix. Manufacturers use tungsten carbide as the main material in some high-speed drill bits, as it can resist high temperatures and is extremely hard.

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Tungsten carbide tools have many applications based on the industries that use carbide equipment and other hard materials like diamonds. Tungsten carbide is especially used in sharpening of blades used in industrial applications. These tungsten carbide blades are used to improve versatility and productivity when sectioning plastic. During these cryo applications, the tungsten carbide blade is embedded in a holder made of steel. The blades are consistent and can survive through thousands of applications eliminating the need for frequent changes. The knives are also easy to handle and the risk of cuts is drastically reduced when compared to glass and razor or diamond blades. Its application is also seen in the making of nozzles in varying industry standards. Discharge units are easily manufactured using tungsten carbide. Small and large tiles can be formed into any sharp to fit customized surfaces or edges with minimal effort while still maintaining the high quality standards.

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Tungsten carbide tools for cutting are used in machines that are intended to get into contact with carbon steel and stainless steel. Most of the time tungsten carbide is used as the first material to run through a surface, leaving a finer finish for other machines. In situations where high exposures to high temperatures are to be expected, tungsten carbide tool is employed since it can withstand extremely high temperatures that would melt industry strong steel or other metals. In such situations, the tungsten carbide is referred to as cemented carbide. During manufacture, cobalt is melted and once in the liquid stage, the cobalt combined with tungsten carbide alloys or particles, which act as the aggregate while the cobalt, forms the metal matrix composite. This process is called sintering or hot isostatic pressing. Addition of the naturally ductile cobalt metal goes a long way to ensuring that the tungsten carbide exhibits the characteristic brittle behavior. This process raises the durability and toughness f the final product. Machining of tungsten carbide tools is a difficult undertaking since the carbide tends to be brittle compared to other tool materials. As a result, it is prone to breaking and chipping. To counteract this problem, manufacturers have resorted to selling carbide inserts or simply carbide tools matching insert holders. With this configuration, the tungsten carbide insert is held firmly in place by the larger tool that is made of less brittle material. This combination is usually between tungsten carbide and steel. This arrangement has the benefit of incorporating carbide use without having to worry about the high cost of manufacturing the entire tool purely of tungsten carbide. Most modern face mills are using tungsten carbide inserts as well as some lather tools and end mills. To increase their lifespan, the tungsten carbide tools are coated with Tin, Tic or TiAIN. Most of these coatings have enabled the carbide tools to be harder and/or have more lubricity. Use of a coating also has the advantage of lowering the temperature associated with the cutting and it increases the life of the tool under use.

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Tungsten power's physical properties. The relevant physical properties are average particle size, particle size distribution, apparent, tap, and compact or green density, specific surface other and can be influenced by the oxide properties and reduction conditions. They represent the important criteria for further processing and are responsible for the compactability, sintering behavior, dissolution reactions during liquid-phase sintering, and carburization reaction.


 

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