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A Brief History Of The Development Of Tungsten Carbide
Mar 21, 2018

Since 1893, German scientists have used tungsten trioxide and sugar in an electric furnace to heat to a high temperature to remove tungsten carbide, and tried to make use of its high melting point, high hardness and other characteristics to produce wire drawing die and so on to replace diamond material. . However, because of its high brittleness, easy cracking and low toughness, it has not been industrially applied. In the 1920s, Karl Schroter, a German scientist, discovered that pure tungsten carbide cannot adapt to the intense stress changes formed during the drawing process. Only by adding a low-melting point metal to the WC can the blank be made without reducing the hardness. Has a certain degree of toughness. Schroter first proposed the method of powder metallurgy in 1923, that is, tungsten carbide was mixed with a small amount of iron group metals (iron, nickel, cobalt), then pressed and sintered in hydrogen at a temperature higher than 1300°C to produce a hardness alloy. Patents.

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