PCBN tools can be used to process different materials to obtain better surface roughness. PCBN tool surface roughness is much better than that of carbide tools, and as the cutting speed increases, it is closer to the theory of roughness value.

The PCBN tool processing obtained a slight increase in the hardness of the processed surface layer and a certain degree of hardening, but there was no damage to the metallographic structure of the surface of the machined surface, and the change in the amount of cutting did not damage the metallographic structure of the surface layer of the processed surface.

The hard turning of PCBN tools generally produces residual compressive stress below the surface layer of the part. Compressive stress helps to improve the surface's fatigue resistance, which is also a good performance of PCBN tools. When using PCBN tools, attention should be paid to the selection of processing conditions. The amount of cutting has little effect on the distribution of residual stress, and the tool structure has a great influence on the distribution of residual stress. Especially the geometric parameters of chamfering need to be carefully selected.