Cemented carbides are sintered products of one or more carbide powders

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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