Cemented carbide refers to an alloy material made of refractory metal compound as matrix and transition metal as binder phase, and then made by powder metallurgy method. It is widely used in automobile, medical, military, national defense, aerospace, aviation and other fields. . It is worth noting that due to the different types and contents of refractory metal carbides and binders, the physical and chemical properties of the prepared cemented carbides are also different, and their mechanical and physical properties mainly depend on the type of metal carbide. According to the different main components, cemented carbide can be divided into YT type and YG type cemented carbide.
From the definition point of view, YT-type cemented carbide refers to tungsten-titanium-cobalt-type cemented carbide, the main components are tungsten carbide, titanium carbide and cobalt, and the brand name is “YT” (“hard, titanium” two words Chinese Pinyin prefix) It is composed of the average content of titanium carbide, such as YT15, which means that the average content of titanium carbide is 15%, and the rest is cemented carbide with tungsten carbide and cobalt content. YG-type cemented carbide refers to tungsten-cobalt-type cemented carbide. The main components are tungsten carbide and cobalt. For example, YG6 refers to tungsten-cobalt carbide with an average cobalt content of 6% and the rest is tungsten carbide.
From the performance point of view, both YT and YG cemented carbides have good grinding performance, bending strength and toughness. It should be noted that the wear resistance and thermal conductivity of YT-type cemented carbide and YG-type cemented carbide are opposite. The former has better wear resistance and poor thermal conductivity, while the latter has poor wear resistance and thermal conductivity. it is good. From the point of view of application, YT type cemented carbide is suitable for rough turning, rough planing, semi-finishing, rough milling and drilling of discontinuous surface when the uneven section of carbon steel and alloy steel is intermittently cut; YG type hard alloy It is suitable for rough turning in continuous cutting of cast iron, non-ferrous metals and their alloys and non-metallic materials, semi-finishing and finishing in intermittent cutting.
There are more than 50 countries in the world that produce cemented carbide, with a total output of 27,000-28,000t-. The main producers are the United States, Russia, Sweden, China, Germany, Japan, the United Kingdom, France, etc. The world cemented carbide market is basically saturated. , the market competition is very fierce. China’s cemented carbide industry began to take shape in the late 1950s. From the 1960s to the 1970s, China’s cemented carbide industry developed rapidly. In the early 1990s, China’s total production capacity of cemented carbide reached 6000t, and the total output of cemented carbide reached 5000t, second only to In Russia and the United States, it ranks third in the world.
Post time: Apr-19-2022
