PCBN blade, which is polycrystalline cubic boron nitride blade, is a new type of superhard tool.
PCBN tools not only have extremely high hardness similar to diamond, but also have more valuable properties than diamond, that is, they do not oxidize at high temperatures and are more chemically inert than iron metals. Therefore, PCBN tools can be processed High-strength and high-temperature-resistant materials not only have high efficiency and good quality, but also the tools are durable and more economical.
PCBN blades
For example, in recent years, as long as turning and milling are used instead of grinding, the first thing that comes to mind must be PCBN tools. Because the hardness of CBN micro powder can reach HV8000~9000, the heat resistance can reach 1400℃~1500℃, and the hardness at high temperature of 800℃ is higher than the normal temperature hardness of ceramics and cemented carbide, so the usable tool is 3 times higher than that of cemented carbide. ~5 times the speed for cutting.
In addition, the bonding and diffusion effects of PCBN tools on various materials at high temperatures are much smaller than those of cemented carbide tools, and the thermal conductivity is more than 20 times higher than that of cemented carbide. Its thermal conductivity will also be enhanced as it increases. In addition, the friction coefficient between CBN and different materials is only 0.1~0.3 (0.4~0.6 for cemented carbide). As the cutting speed increases, the friction coefficient will decrease, so the machined surface accuracy is higher.