Compared with existing tools, cermet CNC tools have advantages and disadvantages, so the impact is not appropriate, but they are complementary to the market!

Ceramic cutting tools are available in two categories: aluminum oxide (Al2O3)-based and silicon nitride (Si3N4)-based. They have the characteristics of high work efficiency, long service life and good processing quality.

In the past, due to its low bending strength and high brittleness, it has been mainly used as a finishing tool for a long time, accounting for a small proportion of various types of tool materials.

However, in recent years, due to the control of raw material purity and particle size refinement, various carbides, nitrides, borides and oxides have been added to improve its performance, and its properties can also be improved through particles, whiskers, phase changes, microcracks and geometry.

The synergistic effect of this toughening mechanism improves its fracture toughness, which not only increases the flexural strength to 0.9~1.0GPa (the highest can reach 1.3-1.5GPa), but also greatly improves the fracture toughness and impact resistance. The scope of application

It is expanding day by day. In addition to being used for general finishing and semi-finishing, it can also be used for roughing under impact load. It is recognized internationally as the tool with the most potential to improve production efficiency.

At present, ceramic tools can process materials such as steel, cast iron and their alloys at high speeds at cutting speeds of 200 to 1000 m/min. The tool life is several times or even dozens of times longer than that of cemented carbide.

For example, the RT200 series of solid ceramic drill bits and ceramic end mills launched by the German Guhring Company have a finishing cutting speed of 1000m/min.

At the same time, its emergence has changed the traditional process concept. Using ceramic tools, hardened parts can be processed directly by turning and milling instead of grinding (or polishing). A single process can be used instead of multiple processes, greatly shortening the process flow.

In production, it can be used for general turning, boring and milling processing, and it is more successfully used for precision hole processing.

In addition to being used on ordinary machine tools, it can also be effectively used on high-efficiency equipment such as CNC machine tools.

Compared with superhard tools such as diamond and CBN (cubic boron nitride), the price of ceramics is relatively low, so some people think: "With the continuous improvement of the material properties of modern ceramic tools, it will be compared with coated carbide tools in the future.

Superhard tools such as , diamond and CBN have become the three main tools for high-speed machining.