CNC inserts are the general term for indexable turning inserts, which are the mainstream products in the field of modern metal cutting applications. It is mainly used in metal turning, milling, parting and grooving, thread turning and other fields. According to the material, it can be divided into coated blades, cermet blades, non-metallic ceramic blades, carbide blades, superhard blades, etc. It is characterized by high efficiency and high wear resistance, and the processing efficiency is more than 4 times higher than that of traditional welding blades and alloy blades. With the continuous progress of coating technology, breakthroughs in key technologies of wear resistance and high temperature resistance will further improve efficiency and reduce processing costs.