1. Hard alloy non-standard tool materials  

The material of the cutting tool is the fundamental factor determining the cutting performance of the tool, which has a significant impact on machining efficiency, machining quality, machining cost, and tool durability.  

The harder the tool material, the better its wear resistance, the higher its hardness, the lower its impact toughness, and the more brittle the material. Hardness and toughness are a contradiction and a key factor that tool materials should overcome. For graphite cutting tools, ordinary tialn coatings can choose materials with relatively better toughness, that is, slightly higher cobalt content; For diamond coated graphite cutting tools, it is advisable to choose materials with relatively better hardness, that is, slightly lower cobalt content.  

2. Geometric angles of non-standard hard alloy cutting tools  

Choosing the appropriate geometric angle for graphite cutting tools can help reduce tool vibration, and conversely, graphite workpieces are less prone to breakage.  

3. Coating of non-standard hard alloy cutting tools  

Diamond coated cutting tools have advantages such as high hardness, good wear resistance, and low friction coefficient. At present, diamond coating is the best choice for graphite processing tools and can best reflect the superior performance of graphite cutting tools; The advantage of diamond coated hard alloy cutting tools is that they combine the hardness of natural diamond with the strength and fracture toughness of hard alloy; However, diamond coating technology is still in its early stages in China, and the cost investment is significant. Therefore, diamond coating will not have much development in the near future. However, we can optimize the angle and material selection of ordinary cutting tools, and improve the structure of ordinary coatings. To some extent, it can be applied in graphite processing.  

The geometric angles of diamond coated cutting tools and ordinary coated cutting tools are fundamentally different. Therefore, when designing diamond coated cutting tools, due to the special nature of graphite processing, their geometric angles can be appropriately enlarged, the machining groove can also be enlarged, and the wear resistance of their tool edges will not be reduced; For ordinary tialn coatings, although their wear resistance is significantly improved compared to uncoated tools, compared to diamond coatings, their geometric angles should be appropriately reduced when processing graphite to increase its wear resistance.  

For diamond coatings, many coating companies around the world have invested a lot of manpower and resources in researching and developing related coating technologies. However, so far, mature and economical coating companies abroad are only limited to Europe; Para, as an excellent graphite machining tool, also uses the world's most advanced coating technology to treat the surface of the tool, ensuring both machining life and economic practicality.  

4. Strengthening the Cutting Edge of Non standard Hard Alloy Cutting Tools  

The passivation technology of cutting edge is not yet widely recognized, but it is a very important issue. The hard alloy cutting edge after grinding with a diamond grinding wheel has micro notches of varying degrees (i.e. micro chipping and sawing). The performance and stability of graphite high-speed cutting tools have raised higher requirements, especially diamond coated tools that must undergo passivation treatment on the cutting edge before coating to ensure the firmness and service life of the coating. The purpose of tool passivation is to solve the defects of micro notches on the edge of the tool after grinding, reduce or eliminate their sharpness, and achieve the goal of smoothness, smoothness, sharpness, firmness, and durability.

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