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 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 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 (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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Allegheny Technologies Incorporated (NYS: ATI) announced today that it has reached an agreement to sell its tungsten materials business to Kennametal Inc. (NYS: KMT) for $605 million. The transaction, which is subject to customary closing conditions and regulatory approvals, is expected to be completed during the fourth quarter 2013. As a result of this agreement, ATI will report the financial results of the tungsten materials business in discontinued operations pending completion of the transaction.

The tungsten materials business, called ATI Tungsten Materials, is part of ATI's Engineered Products segment. ATI's tungsten materials business has approximately 1,175 employees and produces tungsten powder, tungsten heavy alloys, tungsten carbide materials, and carbide cutting tools. For the year ended December 31, 2012, ATI's tungsten materials business generated total net revenue of $338.6 million, operating profit of $37.2 million, and EBITDA of $45.3 million.

"ATI's growth opportunities are in our High Performance Metals segment businesses, including precision forgings and titanium investment castings, and in our diversified Flat-Rolled Products segment business," said Rich Harshman, ATI Chairman, President and Chief Executive Officer. "The sale of our tungsten materials business to Kennametal, a recognized global leader in tungsten-based wear-resistant products, provides ATI with increased financial flexibility and simplifies capital allocation and deployment.

"This sale strengthens our focus on ATI's core strategic businesses and emphasizes the technical, commercial and operating synergies between our High Performance Metals and Flat-Rolled Products segment businesses.

"We also believe that the acquisition of the tungsten materials business by Kennametal improves the competitive position of this business, resulting in a stronger business for the benefit of customers and employees."

Goldman, Sachs & Co. acted as sole financial advisor to ATI and K&L Gates LLP is ATI's legal counsel in connection with the transaction.

This news release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on management's current expectations and include known and unknown risks, uncertainties and other factors, many of which we are unable to predict or control, that may cause our actual results, performance or achievements to materially differ from those expressed or implied in the forward-looking statements. Additional information concerning factors that could cause actual results to differ materially from those projected in the forward-looking statements is contained in our filings with the Securities and Exchange Commission. We assume no duty to update our forward-looking statements.

Building the World's Best Specialty Materials Company™

Allegheny Technologies Incorporated is one of the largest and most diversified specialty metals producers in the world with revenues of approximately $4.6 billion for the twelve months ending June 30, 2013. ATI has approximately 10,900 full-time employees world-wide who use innovative technologies to offer global markets a wide range of specialty metals solutions. Our major markets are aerospace and defense, oil and gas/chemical process industry, electrical energy, medical, automotive, food equipment and appliance, construction and mining, and machine and cutting tools. Our products include titanium and titanium alloys, nickel-based alloys and superalloys, engineered forgings and castings, zirconium, hafnium, and niobium alloys, grain-oriented electrical steel, and stainless and specialty steels.

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Carbide is the material based on hard refractory metal compound (hard phase or the ceramic phase) , with metal binder (metal phase), the powder metallurgy method for producing a high hardness, high wear-resistant pieces of , also known as cermet material.

WC - Co cemented carbide is combined of phase of WC and Co binder phase: WC - TiC - Co cemented carbide is the composition of the WC phase, WC - TiC solid solution phase and Co binder phase; And the WC phase, WC - TiC phase belong to the same lysosomal hard phase, they contribute to the wear resistance of cemented carbide, Co phase play the role of binder the hard phase together, contribute to the toughness of cemented carbide, cemented carbide in general owns its contradiction, ie, good toughness, abrasion resistance is poor; good wear resistance, toughness is poor.

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Wedding bands made of carbide contain other materials known as binders, usually metals such as nickel and cobalt. Cobalt has been known to cause allergic reactions on the skin of the wearer, so many manufacturers are turning toward substitute materials. Despite the common misconception that carbide rings cannot be removed in emergency situations, the jeweler's saws used in emergency rooms and jewelry shops can cut through any material that a ring might be made of.

It is important to note that tungsten carbide is made in nearly two dozen different grades that have different properties, depending on what each will be used for. They are almost all variations of just a few parameters: grain size, hardness, and the degree to which a binder is used. Generally, the higher the percentage of the finished product that is composed of binding materials like nickel, the softer it will be and the more it will wear. The size of the original powder grains makes slightly less difference, but can affect the amount of shock that the product will be able to withstand.

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Tungsten carbide 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.

Several common consumer goods contain tungsten carbide, including razor blades and the rotating tips of ballpoint pens. It has also become increasingly common for it to be used in men's wedding bands. When used in this way, the bands have a dark hue that can be polished to a mirror-like shine. Due to the toughness of the material, these rings will remain shiny and scratch-free for decades.

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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).

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Tungsten carbide products are not metal alloy products but products of powder metallurgy.Tungsten carbide and cobalt powder are mixed and fused under high temperature to make tungsten carbide products.

Tungsten carbide products have good hardness. The hardness of tungsten carbide products contributes greatly to its durability when sectioning. The durability of tungsten carbide products depends on various factors, like using frequency, take care of using and others.

It is said that tungsten carbide is the teeth of the modern industry. We believe this and we have made efforts to make the teeth sharpen in the past 22 years.

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