NEWS
1. Ultra-high hardness and wear resistance:
The hardness of the workpiece must be lower than the hardness of the tool material itself to better complete the processing requirements, the general requirements of the tool material hardness above HRC60, the higher the hardness of the tool material, the more wear-resistant the tool in the process of processing;
2, high strength and toughness:
Tool materials should have ultra-high strength and toughness, to withstand the greater cutting force, impact force and vibration during processing, material strength is not enough in the processing of brittle fracture and tool collapse;
3, good process performance and economy:
Tool materials should have good forging, heat treatment, welding, turning processing performance, of course, on this basis, the market is most concerned about the economic practicability of the product (cost performance);
4, excellent heat resistance:
Because of the mechanical cutting, will produce a lot of cutting heat, so the heat resistance of the tool is higher, but also should have good oxidation resistance.
Types, characteristics, properties and applications of superhard cutting tools
Many friends know diamond cutting tools (PCD) and cubic boron nitride cutting tools (CBN). Because of the hardness and wear resistance of these two tools, they are also collectively known as super hard cutting tools.
PCD diamond tool material
As an isomer of carbon, diamond is the hardest material known to exist in nature. In addition to its unique ultra-high hardness, diamond also has ultra-high wear resistance and ultra-high thermal conductivity. It is widely used in the processing of non-ferrous and non-metallic materials, especially in the processing of aluminum, magnesium, titanium and silicon alloys. Diamond tool is the main type of cutting tool that is difficult to replace. It can help processing enterprises to efficiently complete processing operations, stable performance and durable life in machining, has become an indispensable tool in CNC machining.
Classification of diamond cutting tools
1. Natural diamond tool:
Natural diamond as a machining cutting tool has a history of hundreds of years, natural single crystal diamond tool through fine grinding, cutting edge is extremely sharp, its cutting radius up to 0.002μm, is the most ideal tool for ultra-precision cutting, its processing workpiece surface roughness is extremely low and high precision, natural diamond tool is also recognized as an irreplaceable ultra-precision cutting tool;
2, CVD (chemical vapor precipitation method) diamond tool:
Since the 1970s and 1980s, CVD diamond technology has emerged in Japan. It synthesizes diamond film on heterogeneous matrix (such as hard alloy, ceramics, etc.) by CVD diamond tool. CVD diamond tool has almost the same structure and characteristics as natural diamond, and it also has the advantages of polycrystalline diamond tool, so to some extent, it overcomes the shortcomings of other tools.
3, PCD diamond tool: natural diamond is expensive, widely used in cutting diamond or polycrystalline diamond (PCD), since the early 1970s, the use of high temperature and high pressure synthesis technology to prepare polycrystalline diamond successful development, in many occasions natural diamond tools have been replaced by artificial polycrystalline diamond. PCD raw material source is rich, its price is only tens of one to one tenth of natural diamond. PCD cutting tool can not grind out extremely sharp edge, processing workpiece surface quality is not as good as natural diamond, now industry can not easily manufacture PCD blade with chip cutting groove. Therefore, PCD can only be used for non-ferrous and non-metallic fine cutting, it is difficult to achieve ultra-precision mirror cutting.
