Halnn Superhard Materials Co.,Ltd
PCBN Tools and Coating PCBN Tool With the development of the aerospace automotive energy industry, appear a large number of high-performance new materials, such as fiber reinforced composite materials, silicon aluminum alloy, these new high-performance new materials, cutting the urgent problem to be solved, thus promoting the diamond, Cubic boron nitride and other ultra-hard tool material development. When machining the material, how to use different coatings to improve the strength and hardness of the tool material, enhance the bending strength and impact toughness has become a necessary measure. The development of PCBN Tools CBN has high hardness, chemical inertness and high temperature thermal stability, so as abrasive, CBN grinding wheel is widely used for grinding. Because CBN has better properties than other tool materials, the material is used in all areas of cutting, especially in high hardness materials, difficult to process the cutting of the material is unique. After 30 years of development and application, PCBN Tools have been widely used for processing different materials. PCBN Tool material has a high hardness, wear resistance, chemical stability, good thermal conductivity and low coefficient of friction. CBN single crystal micro hardness of 8000~9000HV, is currently known as the second high hardness of the material, PCBN composite sheet hardness is generally 3000~5000HV. So it is used to process high hardness materials with higher wear resistance than hard alloy and ceramic, which will reduce the size of large parts processing or size dispersion, especially suitable for high degree of automation equipment, can reduce the change insert adjustment time. It has a high thermal stability and high temperature hardness, CBN heat resistance up to 1400℃~1500℃. When the cutting temperature is high, it will be softening the processing material, and the difference between the hardness of the tool increases, is conducive to cut, and little affect the tool life of the tool. CBN has a high antioxidant capacity, does not produce oxidation phenomenon at 1000℃, and iron system in 1200℃~1300℃ when no chemical reaction, but at about 1000℃ and water will produce hydrolysis, resulting in A large number of CBN is worn, so when use PCBN Tool with wet cutting, we need to note the cutting fluid type. CBN material thermal conductivity is lower than the diamond but much higher than the carbide, and with the cutting temperature increases.
PCBN tool thermal conductivity is increasing, so the tip of the heat can be quickly spread out, is conducive to improve the accuracy of the workpiece. CBN and the friction coefficient of different materials between 0.1 and 0.3, is much lower than the friction coefficient of cemented carbide (0.4 ~ 0.6), and with the friction and positive pressure increases slightly Reduced. So the low coefficient of friction and excellent anti-adhesive ability, so that PCBN cutting tool is not easy to form a retention layer or BUE, is conducive to improving the processing surface quality. PCBN www.halnncbn.com