Engineering application of diamond film -integral type cutting tool

10 October 2020

Diamond has many excellent physical and mechanical properties, such as ultra-high hardness, strength, wear resistance, and corrosion resistance.

The so-called engineering application is a measure to fully develop these mechanical properties and apply them in various fields of industry.

CVD diamond film has almost the same physical and chemical properties as single crystal diamond, and the production process is relatively simple.

The application of CVD diamond coating technology to deposit the diamond film on the surface of the component substrate to make it have diamond-like properties is very promising. Engineering application projects.


-integral type cutting tool

pcd and pcbn cutting tools

With the development of modern machining in the direction of high precision, high speed and efficiency, quite high requirements are put forward on the performance of the tool.

Therefore, it is an inevitable trend of development to develop superhard material tools with higher wear resistance and stable machining for a long time.


On the one hand, natural diamond resources are extremely limited and expensive; on the other hand, single crystal diamond has a cleavage surface and low impact toughness, which limits its large-scale promotion and use in industry.

Although the polycrystalline diamond (PCD) tool material sintered by the high temperature and high pressure method is isotropic to solve the problem of low impact toughness of single crystal diamond, it contains about 5% of the binder component, resulting in the tool life and surface The processing quality is far lower than natural diamond tools.


The preparation technology of depositing CVD diamond film with high adhesion strength and good surface smoothness on the surface of complex shape cemented carbide substrate has always been one of the technical problems that restrict the large-scale industrial application of CVD diamond film coating tools, which greatly limits CVD Application range of diamond film.


Depositing a layer of CVD diamond film on the surface of the cemented carbide milling cutter can effectively enhance its wear resistance. In the experiments of processing graphite and processing Al/SiC-MMCs workpieces, both revealed the superiority of diamond film as a wear-resistant material on the surface of cemented carbide tools, laying the foundation for the further industrial application of diamond film.


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