1923, Germany Shileteer to tungsten carbide powder added 10% to 20% cobalt
do binder, invented a new alloy of tungsten carbide and cobalt, hardness only to
diamond, which is the world's artificial systeminto carbide. Cutting tool made of this alloy steel, the blade will wear out quickly, and even cutting edge crack.
1929 United States in the original ingredients added to a certain amount of
tungsten carbide and titanium carbide compound carbide to improve the
performance of the cutting tool steel. This is the carbide is another achievement
of the history of the development. Carbide has high hardness, good wear
resistance, strength and toughness, heat resistance, corrosion resistance and
a series of excellent performance, especially its high hardness and wear
resistance, even at 500 ¡ã C temperature remain basically unchanged. , at 1000 ¡æ
is still very high hardness. Carbide are widely used as a tool material, such as
turning, milling, planer, drill, boring knives for cutting cast iron, nonferrous metals,
plastics, chemical fiber, graphite, glass, stone and ordinary steel, but also can be
used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult
to machine materials. New carbide cutting tools, cutting speeds hundreds of times
equal to the carbon steel.
Carbide can also be used to make drilling tools, mining tools, drilling tools, measuring
measuring tools, wear parts, metal abrasive cylinder lining, precision bearings, nozzles,
metal mold (such as wire drawing dies, bolts mold, nut mold, as well as the excellent
performance of the various fasteners, molds, carbide gradually to replace the steel
mold). Over the past two decades, coated carbide also come out. 1969, Sweden
successfully developed a titanium carbide coated tool, the tool substrate tungsten cobalt
titanium carbide or tungsten cobalt carbide surface of titanium carbide coating thickness
of a few microns, but compared with the same grade of alloy tool extend the useful life of
three times the cutting speed increased by 25% to 50%. 1970s, the fourth generation of
coated tools can be used to cutting difficult to process materials.