Cemented carbides are sintered products of one or more carbide powders - usually tungsten carbideas the main component _ with a metallic binder (cement), preferably cobalt. Due to the extremehardness  of tungsten carbide and tungsten carbide' based smter alloys,  about 90 % of the globalmanufacturing volume is used for the manufacture of tools.

Tungsten carbide is applied to improvethe wear resistance of moving parts in machines like rolls and balls, of bearings, and nozzles,cutting and drilling tools, and mining equipment. Tungsten carbide cemented with copper or silveris used for electrical contacts and in fuel cells. Since most cemented carbides contain tungstencarbide, which gives them their extreme hardness and their high specific gravity, these alloys arereferred to as hard metals and are often also termed "tungsten carbide". The global production ofhard metals was approximately 20 000 tonnes in 1985 (Tulhoff, 2000).

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Tungsten carbide rod is one of Chinatungsten's best products. It is a kind of new technology and new material. Stable in mechanical properties, easy soldering, high wear resistance and high impact resistant are its’ main features. These Tungsten carbide rod are used for the manufacture of cutting tools for the metal, wood, plastic and other industries where hardness and wear corrosion resistance is required.

Chinatungsten Online is a professional manufacturer of specialty tungsten carbide products in China. As a large scale private enterprise, we design tungsten products, including mold and dies, cutting tools, abnormal profile article, etc. Our products, which are made of high quality tungsten carbide, have reliable mechanical and physical property. Our products have been widely used in many aspects of industry and are the best assistant tools for mass production.

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Tungsten carbide is manufactured by direct carburization of tungsten with carbon (Roempp, 2003).Mixtures ot metal and carbon DiaCK or grapmte are tieated ai a iemperarure of 140u - L v-vacuum or under hydrogen (Tulhoff, 2000):vv+c．)WC.When heating a mixture of tungsten and carbon in a car'oon tube or high-frequency furnace to ca.800 0C, cast tungsten carbide is o'otained (Gmelin, 1993), However, most tungsten carbide is so'I"das powders with distinct ranges of grain sizes (Tulhoff, 2000),
Purity and gYain size determine the physical properties and the technical applicability of tungstencarbide. Since milling changes the chemical composition and the shape of the grains, coarsepowders of tungsten carbide can not be milled to obtain fine-~ained powders.

Instead, to obtain theiesired industr'ie'al' product, the particle size of the raw materials is carefully selected. The grain sizeof the product is also irrfluenc'ed by manufacturing parameters like temperature, reaction tiffie,resence of humidity and hydrogen.'Typica/ production lines start from tungsten ore (W, Nb, Fe-oxides), tungsten scrap, scheelite (Ca\V04), tungstic acid (H2W04), and ammonium paratungstate《NH'4)10W'1'2S04" X 5 H:O). Typica/ intermediates are yellow~(W03), blue (appro}cimatciY  W4Ullj,a'nd brown tungsten oxide '(W02).

There are several m~t'hods for the manufacturin9 0f the technicaltungsten carbide powders (Tu/hoff, 2000): Tungstic acid powder is reduced to tungsten by hydrogenat 750 0C. The metal particles are carburized at 1400 0C. This method is applied for fine powderswith an average grain size of l llm.

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Tungsten carbide (WC) is an inorganic chemical compound containing equal parts of tungsten and carbon atoms. 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. Tungsten carbide is approximately three times stiffer than steel, and is much denser than steel or titanium. It is comparable with corundum in hardness and can only be polished and finished with abrasives of superior hardness such assilicon carbide, cubic boron nitride.

Chinatungsten Online supply premium grade tungsten carbide rod from stock in unground, center-less ground and polished form. What's more, we also supply Tungsten carbide rod according to drawing supplied by customers. Besides, we can offer you high-quality products at a competitive price. We are very please to try our best work for you better. Look forward to your inquiry!

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