2013年6月13日星期四

Tungsten Carbide Plate

CHINATUNGSTEN ONLINE manufacture tungsten carbide plate in different specifications according to clients' specific requirements. The surface condition are divided as sintered blank and grinding, which meet different products applications. Following is a drawing showing the tungsten carbide plate we supplied.

Thickness, width, as well as Length can be various. If you have interest in purchasing tungsten carbide plate, kindly please provide us the following necessary information for production:

1、Specific dimensions including length, width, and thickness
2、Dimension tolerance if you have
3、Surface condition: sintered blank or grinding
4、quantity
5、Tungsten carbide grade or chemical composition

Tungsten Carbide

Tungsten carbide is an inorganic chemical compound that contains equal numbers of tungsten and carbon atoms. It is sometimes colloquially referred to as simply "carbide." In its most basic form, it is a fine gray powder, but it can be pressed and formed into shapes for use in industrial machinery, tools, abrasives, as well as men's jewelry.

The notable and rare combination of physical properties possessed by tungsten carbide makes it useful for a variety of applications. It is extremely strong and wear-resistant. There are only a few materials on earth that can be used to cut or engrave it, with industrial diamond abrasives being one of these. Its tensile strength is very high, but it is brittle under high pressures as a result. The melting point is also very high, at 5,200°F (2,870°C). To boil, it must be heated much further, to 10,382°F (6,000°C).

This compound can be made by reacting tungsten and carbon at temperatures of around 2,552 to 3,632°F (1,400 to 2,000°C). It is then often made into mills and cutting tools for industrial use, which are able to withstand heavy use and high temperatures. Military organizations also use it in armor-piercing ammunition as an alternative to depleted uranium because of its very high density and hardness level. Some sporting goods are made stronger and more durable by the addition of carbide. Trekking poles used by hikers, for instance, use carbide tips in order to gain traction on hard or rocky surfaces.

Cemented Tungsten Carbide Strip

Cemented Tungsten carbide is a sintered metallurgical product of powder form. It is manufactured in vacuum or Hydrogen reduction furnace with refractory Tungsten material (WC) micron powder as the main ingredient and Cobalt (Co), Nickel (Ni) or Molybdenum (Mo) as the binder.

Cemented Tungsten carbide has many excellent characteristics such as high hardness and strength, good wear and corrosion resistance and salient stability under high temperature (even at 500 oC it is essentially unchanged and at 1000 oC it is still of high hardness). It can be used to cut cast iron, nonferrous metals, plastics, chemical fiber, stainless steel and high Manganese steel, etc., and make drilling tools, mining tools, measuring gauges, wear parts, cylinder liners, precision bearings, nozzles and metal molds, etc..

Stanford Materials provides various machined cemented Tungsten carbide products of different forms such as rod, strip, mill and drill, cutter/tip, nozzle, dies and complex parts, etc..

We supply three types of cemented Tungsten carbide strips: strip with angle, round strip and cemented Tungsten carbide strip.

Cemented Tungsten Carbide Rod

Cemented Tungsten carbide is a sintered metallurgical product of powder form. It is manufactured in vacuum or Hydrogen reduction furnace with refractory Tungsten material (WC) micron powder as the main ingredient and Cobalt (Co), Nickel (Ni) or Molybdenum (Mo) as the binder.

Cemented Tungsten carbide has many excellent characteristics such as high hardness and strength, good wear and corrosion resistance and salient stability under high temperature (even at 500 oC it is essentially unchanged and at 1000 oC it is still of high hardness). It can be used to cut cast iron, nonferrous metals, plastics, chemical fiber, stainless steel and high Manganese steel, etc., and make drilling tools, mining tools, wear parts, precision bearings, nozzles and metal molds, etc..

Stanford Materials provides various machined cemented Tungsten carbide products of different forms such as rod, strip, mill and drill, cutter/tip, nozzle, dies and complex parts, etc..

We supply three types of cemented Tungsten carbide rods: PCB rod, blank rod and rod.

Properties of Tungsten Carbide

Tungsten carbide is sometimes colloquially referred to as simply "carbide." Its general definition is described as: Tungsten carbide is an inorganic chemical compound which contains equal numbers of tungsten and carbon atoms. It is also called tungsten cemented carbide. Tungsten cemented carbide can be pressed and formed into shapes from fine gray powder, which is considered to be its most basic form. The applications of tungsten cemented carbide are widely reflected in industrial machinery, wear resistant tools, abrasives as well as men' s jewelry.

Tungsten cemented carbide is the preferred material for parts that must withstand all forms of wear (including sliding abrasion, erosion, corrosion/wear and metal-to-metal galling) and exhibit a high degree of toughness. It exhibits high compression strength, resists deflection, and retains its hardness values at high temperatures, a physical property especially useful in metal-cutting.

Main Properties of Tungsten Carbide
Excellent Hardness: 86~93 HRA, which equal to 68~81HRC;
Excellent hot working performance: Hardness could be remained at 60 HRC under 900~1000 ℃
Excellent wear resistance;
High cutting speed;
Long service life;

2013年6月1日星期六

Cemented Carbide Wear in Rock Drilling

Cemented Carbide Wear in Rock Drilling
WC/Co cemented carbide is a composite material for highly demanding wearing applications. The unique combination of high hardness (from hard phase WC) and toughness (from the binder, Co) gives a material especially suitable for rock drilling. This thesis investigates the deterioration and wear of these cemented carbide buttons and the correlation to different rock types, see Figs. 1. and 2. The work has been performed at the Tribomaterials Group by Ulrik Beste during 1999-2004, and has been financially supported by AB Sandvik.
To better understand the nature of the wear of the cemented carbide buttons, the counter surface -the rock- has also been studied. A range of important rock types has been investigated with respect to hardness distribution and scratch response in a micro scale and friction properties when slid against cemented carbides. An example of scratch response could be seen in Fig. 3.
The cemented carbide may deteriorate due to a number of mechanisms. The effect of fatigue in the structure was studied in TEM and particle erosion response was used to probe the corresponding mechanical degradation.
Further, homing cross sectioning has been developed and used as a new technique to investigate the presence of weak zones in the surface layer of a drill button, see Fig. 4. It was found that rock penetration into this layer is a very common deterioration mechanism, with profound implications for the nature of the wear.
Figure 4. 
By using the newly developed technique ”Homing cross sectioning” on a cemented carbide rock drill button, it becomes obvious that the surface in a rock drill button has a completely new composition by intermixture of rock.
High resolution scanning electron microscopy has been extensively used to map the deterioration and wear of numerous drill buttons, worn against different rock types in different kinds of drilling applications. Finally, the collected data on the surface damage, the reptile skin formation, the rock penetration and the properties of the rock are assembled into a new view of the deterioration and wear of cemented carbide in rock drilling. The new view includes life limiting factors, five classes of material deterioration and five classes of material removal.

Cemented Carbide


Cemented Carbide
Cemented Carbide is one of the most successful composite engineering materials ever produced. Its unique combination of strength, hardness and toughness satisfies the most demanding applications.
The most valuable property of Cemented Carbide is that it offers a safer and more dependable solution than any other known material to one of the toughest problems engineers contend with - reliability. Learn all about Cemented Carbide!

Tungsten Carbide Uses

Tungsten Carbide Uses
Cutting tools for drilling, mining and construction often incorporate the use of tungsten carbide. These are undoubtedly the biggest markets for tungsten carbide, accounting for around 60 percent of its use. The use of this material in jewelry is becoming popular. Everything from rings to necklaces can be fashioned out of tungsten carbide. Tungsten carbide is also used on the tips of trekking poles and as spikes on snowmobile equipment. It is also used in ball point pens to align the roller ball with ink. Filaments from light bulbs are made out of tungsten because of its resistance to heat.

Tungsten Carbide Facts

Tungsten Carbide Facts
Tungsten carbide is known for its hardness and high melting point. On the Mohs scale for testing hardness, tungsten carbide receives a rating of nine, surpassed only by diamonds, which have a hardness of 10. This hardness makes tungsten carbide very scratch-resistant. The melting point of tungsten carbide is around 2,600 degrees Celsius. By itself, tungsten carbide is not a naturally occurring material, it is only produced by combining the elements of tungsten and carbon.

Tungsten carbide is a type of steel

Tungsten carbide is a type of steel. It is comprised of mainly tungsten carbide and cobalt. The cobalt acts as a binder and improves shock resistance. As the percentage of cobalt in the mix rises, so does the shock resistance. These materials generally start as powders. A small amount of wax is then added to the mix. This holds the materials together so they can be molded. The mix is then placed in a de-waxing furnace overnight. It is removed and takes a more chalk like appearance. (S1, p1) As a result of this, a material is obtained which combines high strength, toughness and high hardness.
Tungsten carbide has very high strength for a material so hard and rigid. Its compressive strength is higher than virtually all melted and cast or forged metals and alloys. It has a tensile strength of 100,000-500,000 psi and a Brinell harness of 2570. (S3, p1) It has the highest melting point of any metal. It also has high thermal conductivity with a range of twice that of tool steel and carbon steel. A high resistance to corrosion enables it to be used in extreme conditions in or out doors. It also has a very high modulus of elasticity. Tungsten carbide is the hardest metal known to man. It has a hardness close to diamond. (S4, p1)
Tungsten carbide is known for its ability to retain an extremely sharp edge for an extended amount of time under certain cutting applications. It is also very brittle and is prone to nicking and chipping very easily. It is one of best-known materials for precision cutting. This is why one of the main uses for tungsten carbide is in a machine shop. Tungsten carbide can be fastened to other materials by any of three methods; brazing, epoxy cementing, or mechanical means. As prices go down and more and more technology is developed to use this material, machines and companies all over the world are reaping the benefits of having much stronger and longer lasting bits and blades.