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How to Grind Tungsten Carbide

Details: Category: Tungsten Information; Published on Wednesday, 11 September 2013 14:30; Hits: 2237

Tungsten carbide is a very hard material made from tungsten and carbon. It is commonly used for the tips of tools, especially cutting tools. While this material is very hard, it does become worn over time and may require grinding or sharpening. Carbide tools and tips can be ground with a diamond grinding wheel, but grinding a tool evenly requires skill and practice.

Instructions

1

Attach the diamond wheel to your bench grinder. Refer to your manual to ensure that the wheel is properly attached and the grinder itself is appropriately mounted.

2

Hold your tungsten carbide tool against the rest beneath the wheel. Touch the tip to the wheel, but do not turn on the grinder yet. Adjust the rest as needed so that you achieve the necessary grinding angle for your particular tool. Many rests will allow you to adjust both the height and the angle of the rest.

3

Remove the tool from the rest, then turn on the grinder. Touch the tip of the tool to the moving wheel, just as you did before when determining the angle, and use the rest to guide the angle of the grinding. Carbide may emit short red sparks during grinding. These are normal. The carbide tool may also become very hot. Work in short intervals and do not burn yourself, overheat the tool or touch the tool immediately after grinding. Continue grinding until the tool is sharpened.

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Industrial Applications of Tungsten Carbide

Details: Category: Tungsten Information; Published on Wednesday, 11 September 2013 14:27; Hits: 2093

Industrial Applications

Due to the hardness of tungsten carbide, its creation was a breakthrough for the mining industry. Since it is much harder and denser than steel, tungsten carbide, when used on drills, is able to drill through more rock and have a longer lifetime than steel drills. Tungsten carbide is also used as a machine cutter to cut through steel and other metals.

Military Uses

Because tungsten carbide is so hard and dense, the military uses it to make armor-piercing ammunition. It was first used during World War II by German fighters vs. Soviet tanks. Tungsten carbide is also used as artillery ammunition. Smaller caliber weapons, such as machine guns and handguns, also can use tungsten carbide. The use of this ammunition leads to more destruction as few forms of armor are able to stop the bullet.

History

Tungsten carbide was first used in the 1920s when a German light-bulb company sought ways to make cheaper wiring for the light bulbs. Since tungsten carbide has a high melting point, this compound worked perfectly for light bulbs because the temperatures inside them get very hot. The production of tungsten carbide was perfected by the 1930s and other elements were also added in order to make the compound useful for other applications.

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WC Powder Production

Details: Category: Tungsten Information; Published on Wednesday, 11 September 2013 14:23; Hits: 2201

There are several ways of producing tungsten carbide, tungsten carbide producers expand the traditional method is to use a solid carbon tungsten carbide powder in the system, this method can produce powder particle size of 1 ~ 30μm tungsten carbide powder. Sumitomo Electric and Tokyo, Japan, the company successfully developed tungsten tungsten trioxide directly with the production of ultra-fine tungsten carbide powder. Currently, this method has been successfully used for industrial scale Qi production of high quality composite ultrafine tungsten carbide and carbide powder. In addition, the world carbide research, production unit also developed a spray pyrolysis conversion Huan, co-precipitation method, gas carburizing, high-energy ball milling, mechanical alloying, plasma Act and other methods.

Solid Carbon Carbonization

Tungsten carbide powder with the carbon-containing process gas phase reaction is carried out. Hydrogen-carbonization, the hydrogen and the material in the first carbon react to form hydrocarbons when the temperature is low, the main component is methane (CH4), methane is unstable at high temperatures, 1400 ℃ in full cleavage of carbon and hydrogen .

Direct Carbonization Tungsten Trioxide

Japan Tokyo Tungsten Corporation and Sumitomo Electric Industries Research and Development of tungsten trioxide prepared directly for foot-quality ultrafine tungsten carbide powder, produced by the process of the necessary equipment mixer, granulators, dryers, and two rotary furnaces components.

Nanocrystalline WC-Co Composite Powder Preparation Method

Carbide is the key to preparing nano Nano WC powder, tungsten carbide and traditional manufacturing methods can not meet this requirement. U.S. ZGBan et al mechanically activated - reduction / carbonization prepared nanocrystalline WC-Co composite powders were studied. Mechanical alloying (Mechanical Alloying) method is the use of high energy ball milling, crushing, cold welding and mechanical force action under the low temperature solid phase reaction, the chemical synthesis of nanometer WC powder. Plasma chemical vapor deposition method to prepare nano WC is a widely used method, the principle is the use of plasma generator (100kW) produces heat, methane (CH4) or acetylene (C2H2) as the carbon source, W, or WO3 as a raw material in temperature 2700-3500K under chemical vapor-phase synthesis.

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What Is the Hardness of Tungsten Carbide?

Details: Category: Tungsten Information; Published on Wednesday, 11 September 2013 14:25; Hits: 2046

Hardness

Tungsten carbide measures a nine on Moh's hardness scale, meaning it is about as hard as corundum, but not as hard as diamond. In order to polish or finish an item made of tungsten carbide, a diamond must be used because any other metal or mineral would crack and break. Only a diamond is hard enough to be able to scratch tungsten carbide. Its density also surpasses the density of titanium.

Composition and Properties

Tungsten carbide is created when tungsten and carbon are combined in equal amounts. In order to create tungsten carbide, the process has to be carried out at temperatures between 1,400 and 2,000 degrees centigrade. The resulting product, tungsten carbide, has an extremely high melting point of about 5,200 degrees Fahrenheit and a low electrical resistance, meaning it readily conducts electricity.

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History of Tungsten Carbide

Details: Category: Tungsten Information; Published on Wednesday, 11 September 2013 14:23; Hits: 2093

Tungsten is a resilient steel-gray metal, located in many different ores. While the metal was actually discovered by Carl Wilhelm Scheele in 1781, its many uses weren't discovered until the early decades of the twentieth century. Tungsten carbide has been used in mining and mechanical applications--everything from light-bulb filaments and x-ray tubes to drill bits.

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