2010年4月11日星期日

Tungsten Heavy Alloy Anti-vibration Tool Holders

Tungsten Heavy Alloy Anti-vibration Tool Holders

Anti-vibration boring bars
Deep boring operations require the use of tool holders. To achieve the best precision, vibrations must be eradicated.
Thanks to its density, the mechanical characteristics of tungsten make it the perfect solution for tool holders.
Moreover, Chinatungsten Online offers:

* a very good machinability,
* a homogeneous and porosity-free structure,
* an increase in the machining efficiency.

Boring Bar Holders
Benefits offered by Chinatungsten Online Boring Bar Holders include:
• Compatibility with anti-vibration bars.
• Increased cutting performance.
• Deeper boring capability (up to 10 times diameter).
• Increased performance over standard boring bars.
• Available with Through-Tool Coolant.


If you get any interest in this product, please feel free to email us: sales@chinatungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595.

Tungsten Heavy Alloy Flywheel Weights

Tungsten Heavy Alloy Flywheel Weights

Recently the popularity of adding tungsten alloy flywheel weights has increased dramatically. More and more riders discover that they can go faster for longer with the smooth power delivery, better traction, and reduced stalling that Tungsten alloy flywheel weights provide. Adding a tungsten alloy flywheel weight will increase the rotating mass, or inertia, of the motor. The result is an engine that is a little slower to rev, has more controllable power delivery and less hard hitting power, a more usable low to mid-range, and is less likely to stall at slow speeds or with the rear brake. What you will feel is better traction when it is slippery or hard pack, a torquier and broader power band, the top endpower on many bikes will be improved with less tendency to lose RPM's when climbing or hitting obstacles. The easier to control power will help you conserve your strength and energy, plus many bikes start easier with the added weight. Most can be installed in less than a half hour without removing the stock flywheel from the engine. Our weights are also easily removed so you can change the power delivery back to stock for different riding conditions. Tungsten alloy flywheel weights are machined on computer operated lathes for the ultimate in balance, trueness and strength. Our weights are designed to fit each specific model of motorcycle for a close fit and best possible performance. For most models we offer several different weights so you can choose the amount of weight to suit your riding style and conditions. Generally for a fast, aggressive rider or for faster terrain a light to medium flywheel weight would be the best choice. For a slower more casual rider or for riding slower technical terrain a heavier weight is ideal. Call us and we will be happy to discuss your situation and make suggestions.


If you get any enquiry, please feel free to email us: sales@chinatungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595.

Tungsten Alloy Extrusion Dies

Tungsten Alloy Extrusion Dies

Why use tungsten alloy?

  • Its thermal conductivity is 3-4 times that of steel, so tools run much cooler
  • Its thermal expansion is one third that of steel
  • It withstands thermal shock
  • It requires no heat treatments
  • All of which results in less production downtime!

Chinatungsten Online gives good value because it has excellent mechanical properties at elevated temperatures. It also:

  • Resists erosion and scaling
  • Minimizes soldering and heat checking
  • Is machinable, similar to gray cast iron

No costly heat treatment is required—tools and goods can be placed into service as machined. Chinatungsten Online’s extrusion die maintains superior physical properties compared to steel at high working temperatures.


Our extrusion die is readily available. Most commonly used diameters are in stock. All diameters are centerless ground or lathe-turned finishes.

Thermal fatigue is the no.1 reason of tool end of life. Higher tensile strength and better thermal conductivity goes a long way to minimize thermal fatigue and thereby improve tool life. Our product, counterpart of Anviloy 1150, has a higher tensile strength at elevated temperatures than tool steel and has 5 times better thermal conductivity than tool steel. You can enjoy up to 10 times the die life with our product.


Our product should be considered a complimentary product to tool steel, not a replacement. Tool steel does a good job in many die casting applications, but its life decreases as casting temperatures increase. Our product is perfect for these high temperature applications. It's typically used for core pins and rods which create the thru-holes, cavities, and indentations inside the castings.


Use Weld Rod for welding our product to other die materials, repairing cracked dies, and building up die erosion areas, thus extending the life of your investment.
With our die cast tool, you will enjoy:

  • Decreased Costs: A longer die life means fewer replacement dies and less downtime changing them.
  • Improved Quality: An improved surface finish on the part means fewer rejects, less secondary machining, and also lower costs due to less scrap.
  • Increased Production: The potential to reduce cycle times due to the faster cooling rate provided by our product.

Here's how it works:

  • Minimizes Thermal Fatigue. Thermal fatigue (or heat checking) is the major reason for end of tool life. Heat checking is a thermo-mechanical fatigue process caused by thermal cycling, which creates cyclic stresses and strains in the cavity surface. Typical damage is the gradual growth of a network of cracks. our product has low thermal expansion and high thermal conductivity which are fundamental for heat checking resistance. The low thermal expansion allows for low thermal stress. A high thermal conductivity reduces the thermal gradients and thereby the thermal stress by cooling the casting faster.
  • Low Erosion. Erosion of the die is a problem. Our product provides a low erosion rate due to its chemical resistance. This occurs because molten aluminum dissolves tool steel. Aluminum does NOT dissolve our product; therefore you have a longer die life. This means you don't have to change the die or core rods as often which results in less downtime. Die life can be up to 10 times longer with our product.
  • Reduces Soldering. Soldering (or sticking) of aluminum to the tool steel die as its being ejected is also a problem. Our product can be a real problem solver for soldering because its high thermal conductivity allow increased cooling rates in difficult to cool areas of a die casting. When it's cooler it won't stick to the aluminum. The tool steel is still hot and may hold onto the aluminum.
  • Better Surface Finish. Poor surface finish can be a result of soldering (or sticking). As the tool steel heat checks and the surface of the die gets worse, soldering may occur which will cause surface finish problems with the part. This is a major issue where a functional or cosmetic finish is important.
  • Readily Machinable (similar to gray cast iron). It's easier to machine than heat treated tool steel. It also requires NO pre or post machine heat treatment as tool steel. You buy tool steel annealed and then you must heat treat it after you machine.
  • Easily Repairable. Cracked or chipped dies and core rods can be easily repaired by welding using Weld Rod.
  • Minimizes Shrinkage Porosity. Shrinkage Porosity is a void left in a solid casting due to the change in volume that takes place during the solidification of molten metal. Because our product has 5 times the Thermal Conductivity of tool steel, this higher level of thermal conductivity will pull the heat out faster (i.e. faster cooling rate) and thus reduce shrinkage porosity.


If you get any enquiry, please feel free to email us: sales@chinatungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595.

Tungsten Heavy Alloy Prefabricated Fragments

Tungsten Heavy Alloy Prefabricated Fragments

Fragmentation warhead is one of the main types of warheads, mainly by the role of high-energy explosives, the formation of a large number of high-speed fragments, using high-speed hitting the fragments, the role of ignition and detonation damage targets, and can be used for anti-effectives (human, animal), no armor or light armored vehicles, aircraft, radar and missiles and other weapons and equipment. According to the generation of fragments channels, fragmentation warhead can be divided into natural, pre-control and pre-fragmented warhead three types.

Fragmentation is a natural under the action of detonation products, the shell expansion, fracture broken is made of such warheads is characterized not only as a container shell to form another anti-elements, fragments the size of the uneven, irregular shape in the air fast decay in flight speed, so that the effective anti-personnel grenade limited in scope.

Pre-control use of shell fragments groove, groove or increase the lining of explosives and other technical measures to make the shell partial reduction of the intensity to control the explosion of the broken parts to form fragments. Such warheads are characterized by the formation of fragment size of the uniform, shape the ground rules.

Prefabricated fragments forming a pre-processing will be the shape and quality of pre-designed steel ball, steel arrows, tungsten ball, tungsten and other prefabricated column fragments produced prefabricated sets of body fragments, and installed in the grenade projectile outer surface or inner surface. These prefabricated projectile fragmentation grenade explosion with the formation of fragments together constitute the natural fragmentation field, due to resistance of prefabricated fragments flying characteristic consistency, with prefabricated fragments of the grenade will be set within the framework of the lethal effect of a relatively dense, full-bombs a greater degree of lethality increase.

Because there is a prefabricated fragments will affect the negative effects of missile body structures, usually only in low-pressure chamber which uses artillery and ammunition, such as the forced large-caliber bullets and grenades. Applications also are the most common aircraft shells, grenades, mines and so on. The current high chamber pressure prefabricated artillery fragments, are used in canister form, such as Switzerland, L70-type 40 mm grenade where overhead is filled with tungsten carbide ball. Prefabricated fragments technology has been widely used on all types of warheads. Cylindrical fragments (Tungsten column) as a type of prefabricated fragments, due to high density, armor-piercing capability, as air defense, anti-radiation, anti-surface, one of the main anti-elements, and widely used.

Tungsten alloy balls for Prefabricated Fragments

Tungsten alloy ball
Specification: Φ2mm-Φ100mm
Density: ≤18.5g/cm³
Application: High density tungsten alloy ball usually use as prefabricated fragment in ammunition.

Chinatungsten can provide advanced tungsten alloy products, and we could products which meet the standard concerning with military according to the customer's special requirements.
Remarks : Your special requests are available.

Brands

Physical and mechanical properties

Density

g/cm³

Hardness

HRC

Tensile strength

MPa

Elongation

%

Toughness

MJ/m²

W263H

17.25±0.15

≥35

≥1050

≥8

≥0.3

W253H

17.40±0.15

≥35

≥1050

≥8

≥0.3

W243H

17.60±0.15

≥35

≥1050

≥7

≥0.3

W232H

18.10±0.15

≥37

≥1050

≥6

≥0.1

W231H

18.30±0.15

≥37

≥1050

≥3

≥0.1

W221H

18.50±0.15

≥37

≥1050

≥2

≥0.07

W243H

17.60±0.15

≥40

≥1300

≥6

≥0.15

W232E

18.10±0.15

≥40

≥1300

≥6

≥0.15

W273

17.10±0.15

≥23

≥900

≥24

≥1.30

W263

17.25±0.15

≥23

≥900

≥23

≥1.20

W253

17.40±0.15

≥24

≥900

≥22

≥1.10

W243

17.60±0.15

≥24

≥920

≥20

≥0.90

W232

18.10±0.15

≥25

≥920

≥14

≥0.45

W231

18.30±0.15

≥26

≥920

≥12

≥0.30

W221

18.50±0.15

≥27

≥920

≥10

≥0.22

WNiCu

16.00-18.50

≥22

≥450

2-8

/


If you get any enquiry, please feel free to email us: sales@chinatungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595.

Tungsten Heavy Alloy Penetrator

Tungsten Heavy Alloy Penetrator

Some Passive Attack Weapon is an air-dropped guided bomb containing 3,750 non-explosive steel and tungsten penetrator rods of various sizes. It was designed to attack targets where an explosive effect may be undesirable, such as fuel storage tanks in civilian areas.


A kinetic energy penetrator (also known as a KE weapon) is a type of ammunition which, like a bullet, does not contain explosives and uses kinetic energy to penetrate the target.


The 'Fin' round travels at around 975 m/s (3200 ft/s), resulting in the generation of three and a half tones of force when it comes in contact with a weighted and/or fixed object. Energy, and therefore speed, inevitably decreases during flight, however it is still very deadly at ranges up to six kilometers.


The principle of the kinetic energy penetrator is that it uses its kinetic energy, which is a function of mass and velocity, to force its way through armor. The modern KE weapon maximizes KE and minimizes the area over which it is delivered by:

  • being fired with a very high muzzle velocity
  • concentrating the force in a small impact area while still retaining a relatively large mass
  • maximizing the mass of whatever (albeit small) volume is occupied by the projectile—that is, using the densest metals practical, which is one of the reasons depleted uranium is often used.

And also kinetic energy penetrators composed of tungsten based alloys avoid the cost and toxicity issues associated with uranium. In this program, High Pressure Float Zone crystal growth was investigated as a means of producing single crystal and oriented polycrystalline tungsten and tungsten alloys X-ray diffraction, high rate compression testing, and optical microscopy were used to assess the results.


Tungsten alloy is a very important component in the kinetic energy penetrator, and Chinatungsten Online can provide the tungsten products used in kinetic energy penetrator. If you get any enquiry, please feel free to email us: sales@chinatungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595.

Tungsten Heavy Alloy Paperweight

Tungsten Heavy Alloy Paperweight

What's Paperweight?
Paperweight is decorative objects, designed to hold sheets of paper on a surface to prevent wind from blowing them away. Paperweight has a long history in China, even can be traced back to the birth date of paper.


Recorded in the West that the first documented appearance can be traced to the Exhibition of Austrian Industry held in Vienna in 1845. The paperweights of Pietro Bigaglia of Venice were displayed at this exhibition. Knowledge of their existence was reportedly soon brought to the attention of the Saint-Louis glass factory in France.

Modern Paperweight
Tungsten paperweight is composed of a metal alloy, tungsten heavy alloy. The alloy allows for maximum hardness and rigidity without sacrificing tensile strength. Each tungsten paperweight is polished with diamond tools. Hardness, assuring long lasting beauty, permanently polished. Tungsten paperweight takes a brilliant high polish and resists scratching longer than any metal ever offered to the public. Roughly ten times harder than 18k gold and four times harder than Titanium, Tungsten paperweight will never bend out of shape.
It is also possible to have "custom" bars made to your specifications.

Applications of Tungsten Paperweight:
*In your office and your clients’ office
*As a personal gift to your family, your friends, your lover and your business partners
*As your company’s gift with your logo sent to your VIP clients, if you are a manager of a Insurance company, a bank and any big company, we believe the WHA paperweight should be the best choice for you, also we believe your gift will make the biggest surprise to the right person who gets it.

Chinatungsten Online (Xiamen) Manu. & Sales Corp., is one of most famous and professional manufacturers and exporters to supply various high-quality tungsten worldwide for over 20 years. We always provide different tungsten products base on specific requirement with dimensions, drawings and so on. Any of your enquiries will be welcome to us. And we are sure to offer our excellent service to all of our esteemed clients.


If you have any questions, you can reach us with the following methods:
Tel: +86 592 5129696;Fax:+86 592 5129797;Email: sales@chinatungsten.com

Tungsten Iridium Stream Mouth

Tungsten Iridium Stream Mouth

What is tungsten iridium stream mouth?
The tungsten iridium stream mouth is as a special tungsten heavy alloy with other refractory metals. It mainly uses in rare-earth metal smelting, the induction furnace heating element, the quartz glass smelting and so on, makes the high temperature vessel. In the glass and the ceramic industry, the tungsten class mouth is a ceramic micro production very essential part. The tungsten proportion is big, degree of hardness is big, the heat conduction electric conductivity good, heat-resisting, wear-resisting, anti-corrosive, has the low expansibility and the size stability under the high temperature. The tungsten melting point is highest when all metals (reaches as high as 3380 degrees Celsius), the steam tension to be lowest, the tensile strength is highest (1650°C), and its antiseptic property is good, the majority inorganic acid are very small to its corrosion. Therefore it is ideal to manufacture heavy alloy. But the tungsten and the iridium make the alloy, its abrasion resistance, degree of hardness, the intensity, the heatproof quality obtained the further promotion, thus has guaranteed the product uniformity well. Is precisely these precious performance, causes it to become now in the high-tech crystal glass industry the indispensable equipment component.

Some photos of tungsten alloy products from Chinatungsten

Chinatungsten specializes in manufacturing and offering tungsten iridium stream mouth, any enquiry will be warmly welcomed by email to sales@chinatungsten.com or telephone to 0086 592 5129696.

Tungsten Heavy Alloy Components for Quartz Glass Production

Components for Quartz Glass Production

Quartz glass or quartz material is produced in special high-temperature furnaces due to the high melting temperatures (approx. 2000°C). The heart of such a furnace consists of a melting crucible, which is continually filled with quartz sand and heated to melting temperature.
The melting crucibles therefore consist of riveted or pressed / sintered (seamless) tubes made of molybdenum or tungsten or a combination of Mo/W.


The quartz glass tubes or rods are removed through an orifice. The heating system consists essentially of tungsten mesh or rod heating elements. To achieve or regulate the desired dimensions, a plug and plug pole made of refractory metals are necessary in addition to the orifice plate.


Areas of application for quartz glass are lighting technology, the semiconductor industry as well as fibre-optic technology. Quartz material is used for temperature measurement and also in the foundry industry.


Fittings for the Quartz Glass Production
Chinatungsten Online produces fittings as hoppers, radiation shields, and fasteners in molybdenum, tungsten and WL which are necessary for the quartz glass production. When using our materials not only the lifetime of the fittings but also the lifetime of the whole equipment can be increased.


If you are interest in this information, please feel free to contact us. Any questions or enquiries about tungsten alloy products will be welcomed by email to sales@chinatungsten.com or telephone 86 592 5129696.

Tungsten for Gold-plated Application

Tungsten for Gold-plated Application

Why tungsten alloy is used as gold substitution?
In theory, as its density is 19.1g/cm3, which is approximately 70% denser than lead, uranium could be used as material of making fake coin. However, it is weakly radioactive and not as dense as gold, so it does not appear to be a practical method.

Then people have discovered that tungsten is environmental-friendly, durable and hardness, the most important is that its density of 19.25g/cm3 is just about the same density as gold (19.3g/cm3), which bears the similar specific gravity. These advantages make tungsten enjoys the superiority to be the best substitute for the costly metal of gold or platinum. It is necessary to tell that alloying gold with tungsten would not work for several reasons but a coin with a tungsten center and gold all around it could not be detected as counterfeit by density measurement alone.

The appliances for tungsten alloy as gold substitution
Nowadays, tungsten alloy is increasingly used in some field relevant to gold or platinum substitution, such as: jewelry, e.g. ring, ear ring, necklace, wrist chain, etc. Also, it is widely adopted in making faking coins, such as memorial crown.
Since tungsten alloy bears a special property of longevity and high durability, when it is utilized to make jewelry, it always implicate the love between lovers or couple could be everlasting. Its hardness makes it ideal for rings that will resist scratching, are hypoallergenic, and will not need polishing, which is especially useful in designs with a brushed finish.

Chinatungsten offer tungsten alloy as gold substitution
We are well accustomed to exploit more innovative applications of tungsten products. Gold-plated tungsten is one of our main products.


In details, pure tungsten, in the forms of round disc, plate, sheet, ring, and etc., can be perfectly coated with gold layer with clinquant shine, to replace gold or platinum merchandise except its currency function.


With its highlighted band that is plated with 18K yellow gold, It has highly polished drop-down edges and a satin-finished center that provides a distinguishing contrast to its gold band feature. Masculine and rugged, this 8mm-wide Tungsten Forever ring has been designed to fit you comfortably. Lifetime Sizing, Lifetime Warranty.

Tungsten Rings are the most wear-resistant rings available on the planet. Tungsten is about 10 times harder than 18K Gold, 5 times harder than tool steel, and 4 times harder than titanium. Due to their extreme hardness, Tungsten Rings will hold their shape and shine longer than any ring on the market. Tungsten rings have been referred to as "Permanently Polished Rings". Each Tungsten ring is individually hand-crafted using assorted diamond abrasives and polycrystalline diamond tooling. These Tungsten Forever rings are cobalt-free.


If you are interest in this information, please feel free to contact us. Any questions or enquiries about tungsten alloy products will be welcomed by email to sales@chinatungsten.com or telephone 86 592 5129696.

Tungsten alloy for gold substitution

Tungsten alloy for gold substitution

Why tungsten alloy is used as gold substitution?

In theory, as its density is 19.1g/cm3, which is approximately 70% denser than lead, uranium could be used as material of making fake coin. However, it is weakly radioactive and not as dense as gold, so it does not appear to be a practical method.

Then people have discovered that tungsten is environmental-friendly, durable and hardness, the most important is that its density of 19.25g/cm3 is just about the same density as gold (19.3g/cm3), which bears the similar specific gravity. These advantages make tungsten enjoys the superiority to be the best substitute for the costly metal of gold or platinum. It is necessary to tell that alloying gold with tungsten would not work for several reasons but a coin with a tungsten center and gold all around it could not be detected as counterfeit by density measurement alone.

Gold-plated paperweight

Gold-plated paperweight

The appliances for tungsten alloy as gold substitution

Nowadays, tungsten alloy is increasingly used in some field relevant to gold or platinum substitution, such as: jewelry, e.g. ring, ear ring, necklace, wrist chain, etc. Also, it is widely adopted in making souvenir coins, such as memorial crown and other application such as watch band.

Since tungsten alloy bears a special property of longevity and high durability, when it is utilized to make jewelry, it always implicate the love between lovers or couple could be everlasting. Its hardness makes it ideal for rings that will resist scratching, are hypoallergenic, and will not need polishing, which is especially useful in designs with a brushed finish.

Chinatungsten offer tungsten alloy as gold substitution

We are well accustomed to exploit more innovative applications of tungsten products. Gold-plated tungsten is one of our main products.

In details, pure tungsten, in the forms of round disc, plate, sheet, ring, and etc., can be perfectly coated with gold layer with clinquant shine, to replace gold or platinum merchandise except its currency function.

If you are interest in this information, please feel free to contact us. Any questions or enquiries about tungsten alloy products will be welcomed by email to sales@chinatungsten.com or telephone 86 592 5129696.

Tungsten Alloy Coin Tungsten Ring

Notice: Chinatungsten Online (Xiamen) Manu.&Sales Corp. is a very professional and serious company, specializing in manufacturing and selling tungsten related products for more than two decades. Our gold-plated tungsten alloy products are only for souvenir and decoration purpose. Here we declare: Please do not use our gold-plated tungsten alloy products for illegal purpose.

Besides, if you don't know how to identify true gold or gold-plated tungsten alloy products, you can consult us directly by email: sales@chinatungsten.com or call us by 86 592 5129696.

Tungsten Wire for Phonograph Stylus Tungsten Wire for Music as a type of phonograph stylus Tungsten or Tungs-Tone is a type of phonograph stylus.

Tungsten Wire for Phonograph Stylus


Tungsten or Tungs-Tone is a type of phonograph stylus. They are constructed from tungsten wire, which is held in a metal shank. Unlike a steel stylus, a tungsten stylus has a cylindrical rather than a conical shape, meaning that the cross-section of the stylus remains the same as the stylus wears down, which in turn means that tungsten styluses may be used for several plays.

Typically, a new steel needle is required for every record played on an old acoustic phonograph. This is because the record contains abrasive material. In the first few silent tracks this abrasion hones the steel needle to a profile that tracks the grooves properly. The needle continues to wear as it plays the record, so that by the end its diameter has increased to the point where the sharp edges may damage the grooves on subsequent plays.
If you have interest in this product, just feel free to contact our sales team sales@chinatungsten.com.