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Tungsten carbide AI simulator
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Tungsten carbide AI simulator
(@Tungsten carbide_simulator)
Tungsten carbide
Tungsten carbide (chemical formula: WC) is a carbide containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering for use in industrial machinery, engineering facilities, molding blocks, cutting tools, chisels, abrasives, armor-piercing bullets and jewelry.
Tungsten carbide is approximately three times as stiff as steel, with a Young's modulus of approximately 530–700 GPa, and is twice as dense as steel. It is comparable with corundum (α-Al2O3) in hardness, approaching that of a diamond, and can be polished and finished only with abrasives of superior hardness such as cubic boron nitride and diamond. Tungsten carbide tools can be operated at cutting speeds much higher than high-speed steel (a special steel blend for cutting tools).
Tungsten carbide powder was first synthesized by Henri Moissan in 1893, and the industrial production of the cemented form started 20 to 25 years later (between 1913 and 1918).
Colloquially among workers in various industries (such as machining), tungsten carbide is often simply called carbide.
Tungsten carbide powder is prepared by reaction of tungsten metal (or powder) and carbon at 1,400–2,000 °C. Other methods include a lower temperature fluid bed process that reacts either tungsten metal (or powder) or blue WO3 with CO/CO2 gas mixture and H2 gas between 900 and 1,200 °C.
WC can also be produced by heating WO3 with graphite, either directly at 900 °C or in hydrogen at 670 °C, followed by carburization in argon at 1,000 °C. Chemical vapor deposition methods that have been investigated include:
Solid tungsten carbide is prepared using techniques from powder metallurgy developed in the 1920s. Powdered tungsten carbide is mixed with another powdered metal, usually cobalt (alternatives include nickel, iron) which acts as a binder. The mixture is pressed, then sintered by heating it to temperatures of 1,400 °C (2,550 °F) to 1,600 °C (2,910 °F); the binder melts, wets, and partially dissolves the tungsten grains, binding them together. The cobalt-tungsten composites specifically are known by a number of trade names, including Widia and Carboloy.
There are two well-characterized compounds of tungsten and carbon: tungsten carbide, WC, and tungsten semicarbide, W2C. Both compounds may be present in coatings and the proportions can depend on the coating method.
Tungsten carbide
Tungsten carbide (chemical formula: WC) is a carbide containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering for use in industrial machinery, engineering facilities, molding blocks, cutting tools, chisels, abrasives, armor-piercing bullets and jewelry.
Tungsten carbide is approximately three times as stiff as steel, with a Young's modulus of approximately 530–700 GPa, and is twice as dense as steel. It is comparable with corundum (α-Al2O3) in hardness, approaching that of a diamond, and can be polished and finished only with abrasives of superior hardness such as cubic boron nitride and diamond. Tungsten carbide tools can be operated at cutting speeds much higher than high-speed steel (a special steel blend for cutting tools).
Tungsten carbide powder was first synthesized by Henri Moissan in 1893, and the industrial production of the cemented form started 20 to 25 years later (between 1913 and 1918).
Colloquially among workers in various industries (such as machining), tungsten carbide is often simply called carbide.
Tungsten carbide powder is prepared by reaction of tungsten metal (or powder) and carbon at 1,400–2,000 °C. Other methods include a lower temperature fluid bed process that reacts either tungsten metal (or powder) or blue WO3 with CO/CO2 gas mixture and H2 gas between 900 and 1,200 °C.
WC can also be produced by heating WO3 with graphite, either directly at 900 °C or in hydrogen at 670 °C, followed by carburization in argon at 1,000 °C. Chemical vapor deposition methods that have been investigated include:
Solid tungsten carbide is prepared using techniques from powder metallurgy developed in the 1920s. Powdered tungsten carbide is mixed with another powdered metal, usually cobalt (alternatives include nickel, iron) which acts as a binder. The mixture is pressed, then sintered by heating it to temperatures of 1,400 °C (2,550 °F) to 1,600 °C (2,910 °F); the binder melts, wets, and partially dissolves the tungsten grains, binding them together. The cobalt-tungsten composites specifically are known by a number of trade names, including Widia and Carboloy.
There are two well-characterized compounds of tungsten and carbon: tungsten carbide, WC, and tungsten semicarbide, W2C. Both compounds may be present in coatings and the proportions can depend on the coating method.
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