The main purpose of cemented carbide

    In 1923, Schroter in Germany to tungsten carbide powder add 10% ~ 20% of the cobalt binder, the invention of new alloy of tungsten carbide and cobalt, hardness second only to diamond, this was the first world made artificially cemented carbide. Cutting tool steel made of this alloy, the blade will wear quickly, even edge crack.

    In 1929 the United States Schwarz Kopf added a certain amount in the original composition of tungsten carbide and titanium carbide composite carbides, improves the performance of the cutting tool steel. This is a history of the development and achievements on cemented carbide. Cemented carbide with high hardness, strength and toughness and wear resistance, good corrosion resistance, heat resistance, and so a range of excellent performance, especially the high hardness and wear resistance of it, even at a temperature of 500 ℃ also remained unchanged, at 1000 ℃ still has very high hardness.

    Hard alloy is widely used as a tool material, such as turning, milling, planing, drilling, boring, used for cutting cast iron, non-ferrous metal, plastic, chemical fiber, graphite, glass, stone and steel, can also be used to machining heat-resistant steel, stainless steel, high manganese steel, tool steel and other materials.

    Hundreds of times now cutting speed model of cemented carbide cutting tools is equal to carbon steel. Hard alloy can be also used to make the drilling tools, mining tools, drilling tools, measuring tools, wear-resistant parts, metal tools, precision bearing, cylinder liner, nozzle, the hardware mold (such as wire drawing dies, bolt, nut, and a variety of mold die fastener moulds, excellent performance of hard alloy gradually replaced steel die before).

    In the past twenty years, coated carbide came out. In 1969 Sweden developed titanium carbide coated tools, the tool is a matrix of tungsten titanium cobalt carbide or tungsten carbide, titanium carbide coating thickness of surface only a few microns, but with the same grade alloy tool, prolong the service life by 3 times, the cutting speed is improved 25% ~ 50%. Nineteen seventies has appeared fourth generation coating tool, can be used for cutting hard processing material.