After more than 60 years of development, PCBN tools have gradually matured since GE developed cubic boron nitride (CBN) single crystal powder in 1957 and successfully developed PCBN tools in the 1970s. PCBN cutters are mostly welded by PCBN composite sheets and arbors or indexable blades. In recent years, there are more and more types of integral PCBN blades. The PCBN blade is a composite whole formed by the direct sintering of the PCBN layer of about 1mm on the cemented carbide substrate. This material not only has the high hardness, high thermal stability and high chemical stability of PCBN, but also has the advantages of good cemented carbide strength and good weldability. According to the formula of different contents, the PCBN tool can not only cut various Workpieces with high hardness (powder metallurgy, tungsten carbide, nodular cast iron, grey cast iron, etc.) are also easy to produce by welding. The quality of the PCBN insert directly affects the cutting performance of the tool.
Diamond Compact:
Man-made polycrystalline diamond compact tool (PCD) is a superhard tool developed in the 1960s. It has hardness and wear resistance second only to natural diamond, low friction coefficient, high thermal conductivity, low linear expansion coefficient and high composite bending strength, and is used in high-speed cutting of various non-ferrous metals and non-metals. Its tool durability is tens to hundreds of times that of cemented carbide. my country successfully developed synthetic diamond in the 1960s. On this basis, a layer of polycrystalline diamond is sintered on the cemented carbide substrate by high temperature and high pressure technology, and the two are formed into an integrated cutter blank. This combines the high hardness and wear resistance of diamond with the toughness of cemented carbide. This kind of blade is called synthetic polycrystalline diamond compact, or PCD for short.
PCD tools are mainly used for efficient cutting of non-ferrous metals and non-metals. Such as aluminum and aluminum alloys, copper and copper alloys, cemented carbides, engineering ceramics, graphite, plastics, rubber, laminates, silicone rubber, babbitt alloys, various composite materials, glass fiber reinforced plastics, etc. Especially in the automobile manufacturing, aerospace, aviation, shipbuilding, engine manufacturing industries, it can be widely used.
