Tungsten steel 
 Tungsten steel products in about 18% tungsten 
 Tungsten carbide steel belongs, also known as tungsten alloy. Vickers hardness for the 10K, second only to diamonds. For this reason, tungsten steel products (commonly tungsten steel watch), can not easily be worn with the features. 
 Commonly used in the lathe tool, impact drill bit, glass cutter blade, tile cutter on top of hard not afraid of annealing, but brittle. Carbide is the list of rare metals with high hardness, wear resistance, strength and toughness, heat resistance, corrosion resistance and a series of excellent performance, especially its high hardness and wear resistance, even at a temperature of 500 ℃ also remained unchanged at 1000 ℃ still very high hardness. Carbide is widely used as tool materials, such as turning, milling, planer, drill, boring tool, etc., used for cutting cast iron, nonferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult to machine materials. Now a new type of carbide cutting tools cutting the number of times equal to carbon steel. 
 Carbide can also be used to make drilling tools, mining tools, drilling tools, measuring gauges, wear parts, metal grinding, cylinder liner, precision bearings, nozzles, etc. 
 Major producing countries 
 The world has more than 50 countries the production of carbide, the total output of up to 27000 ~ 28000t-, the main producing countries, the United States, Russia, Sweden, China, Germany, Japan, Britain, France, the world market is basically saturated carbide market competition is very fierce. China cemented carbide industry is formed by the late 1950s, 60 to 70 years China has been rapid development of industrial carbide, carbide China in the early 1990s the total production capacity of 6000t, carbide production of 5000t, second only to Russia and the United States, the world No. 3. Carbide sintering the powder is pressed into billets, and then into the furnace heated to a certain sintering temperature (sintering temperature), and to maintain a certain period of time (holding time), then cooled down to obtain the required performance of the carbide material.