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|Section2= |Section3= |Section4= |Section8= }} Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, 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 for use in industrial machinery, cutting tools, abrasives, armor-piercing rounds, other tools and instruments, and jewelry. Tungsten carbide is approximately two times stiffer than steel, with a Young's modulus of approximately 530–700 GPa (77,000 to 102,000 ksi),〔〔〔〔 and is double the density of steel-- nearly midway between that of lead and gold. It is comparable with corundum (α-) in hardness and can only be polished and finished with abrasives of superior hardness such as cubic boron nitride and diamond powder, wheels, and compounds. == Naming == Historically referred to as Wolfram ''Wolf Rahm'', wolframite ore discovered by Peter Woulfe was then later carburized and cemented with a binder creating a composite now called "Cemented Tungsten Carbide".〔Helmenstine, Anne Marie. (Tungsten or Wolfram Facts ). chemistry.about.com〕 Tungsten is Swedish for 'heavy stone'. Colloquially among workers in various industries (such as machining and carpentry), tungsten carbide is often simply called ''carbide'', despite the inaccuracy of the usage. Among the lay public, the growing popularity of tungsten carbide rings has also led to consumers calling the material just ''tungsten''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tungsten carbide」の詳細全文を読む スポンサード リンク
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