(1) Extremely high hardness and wear resistance: Natural diamond is the hardest substance found in nature, and diamond has extremely high wear resistance. The service life 

of diamond tools is 10 to 100 times, or even hundreds of times, longer than that of carbide tools.

(2) Has a very low friction coefficient: The friction coefficient between diamond and some non-ferrous metals is lower than that of other tools. The low friction coefficient 

means less deformation during processing, which can reduce cutting force.

The cutting edge is very sharp: The diamond cutting edge can be very sharp, and the natural single crystal diamond tool can reach 0.002 to 0.008 m, ultra-thin cutting and 

ultra-precision processing.

(3) Has a very high thermal conductivity: The thermal conductivity and thermal diffusion coefficient of diamond are very high, and the cutting heat is easily dissipated, and 

the cutting temperature of the cutting tool is very low.

(4) Low thermal expansion coefficient: The thermal expansion coefficient of diamond is several times smaller than that of carbide, and the tool size change caused by cutting 

heat is very small, which is especially important for precision and ultra-precision processing with high dimensional accuracy requirements.

Application of diamond tools Diamond tools are mainly used for high-speed finishing and boring of non-ferrous metals and non-metallic materials. They are suitable for 

processing various wear-resistant non-metallic materials, such as glass fiber reinforced plastic powder metallurgy billets, ceramic materials, and other wear-resistant 

non-ferrous metals, such as various si-Al alloys; finishing of various non-ferrous metals. The disadvantage of diamond tools is poor thermal stability. When the cutting 

temperature exceeds 700℃~800℃, it will completely lose its hardness. In addition, since diamond (carbon) at high temperature easily interacts with iron atoms and carbon 

atoms to form a graphite structure, it is not suitable for cutting ferrous metals. The cutting tool is very easy to damage.