Tungsten carbide is a dense, metallike substance, light gray with a bluish tinge, that decomposes, rather than melts, at 2,600° C (4,700° F). It is prepared by heating powdered tungsten with carbon black in the presence of hydrogen at 1,400°–1,600° C (2,550°–2,900° F). For fabrication, a process developed in the 1920s is employed: the powdered tungsten carbide is mixed with another powdered metal, usually cobalt, and pressed into the desired shape,then heated to temperatures of 1,400°–1,600° C; the other metal, which melts, wets and partially dissolves the grains of tungsten carbide, thus acting as a binder or cement. The cemented composites of tungsten carbide–cobalt are known by many trade names, including Widia and Carboloy.
CHINATUNGSTEN ONLINE is a special Tungsten carbide manufacturer and exporter in the past 2 decades, we have supplied nearly all kind of finished and semi-finished tungsten carbide products, e.g. rods, bars, plates, seals, rings, drawing dies, balls, disc cutters, mining tools, buttons, blades, blocks and so on.
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