Currently, single crystal diamond, PCD (or PCD / CC), and were successfully used as a CVD diamond turning, boring tools, drills, reamers, milling cutters, knives and gnashing of teeth forming tool making materials and other cutting portion. Variety diamond material properties and processing requirements must be based on the material being processed to choose, in addition to meeting the technical requirements, but also to meet the economic and environmental performance requirements.
PCD and PCD / CC material
PCD and PCD / CC is most commonly used in the production of diamond material, it applies not only generally machining field, but also widely used in automobiles, motorcycles, high-speed trains, petroleum, chemical, construction, wood processing, and aerospace and other industrial sectors. In the field of automobile and motorcycle, PCD and PCD / CC suitable for machining aluminum engine skirt, pin hole, cylinder block, transmission, carburetor and other wear-resistant parts of the piston. These parts are mostly contain high amounts of silicon (Si> 12%) of aluminum matrix composites, high hardness within hard particles (such as hardness of SiC up 30003500HV) distributed in the aluminum matrix, like a wheel of abrasive cutting edge of the tool would like from abrasion and impact action, leaving the cutting edge wear out quickly. The higher the hardness of the hard particles, the greater the size of the particles, the greater the number of particles, the tool wear faster. Therefore, it is difficult using conventional machining of carbide cutting tools, tool life is very low or no use. Diamond is the world's hardest substance known, the actual use of proven, it is the best aluminum matrix composites processing tool materials. With PCD diamond machining aluminum matrix composites, its cutting speed of up to 8001000m / min, tool life is several times higher than the carbide or even several times, surface roughness values of up to Ra0.0250.012μm. With PCD (or PCD / CC) tooling carbon fiber and glass fiber reinforced plastics (FRP), the chips into powder, cutting temperature is low, and the cutting length of 10 times the K class carbide cutting tools, carbide cutting tools and wear not to 1 / 3.
PCD (or PCD / CC) is also applicable to the processing tool after a pre-fired non-metallic wear resistant cemented carbide material, such as ceramic, rubber, graphite, glass and various wear-resistant timber. PCD tool performance depends largely on its application and processing involved, but the choice of the appropriate grade and particle size can also affect it. PCD inserts of different varieties, because of its different constituent, there is a great difference in cutting, attention must be chosen.
Unlike the current PCD carbide blade as a unified classification in the international arena, each plant has its own varieties and grades, to select a sample to be referring to the manufacturers use. Typically PCD tool suitable for roughing and require a higher fracture toughness tool production, CVD single crystal diamond cutter thick and are used for high-speed finishing and semi-finishing.
