Abrasive wear of the chip surface or some small hard particles ( such as carbides , oxides, etc. ) and impurities (e.g., sand, scale , etc.) and adhesion BUE debris , etc., depicts the surface of the blade groove NC a mechanical wear and tear caused by grain surface . Low expectations for low-speed , cutting temperature is not high speed steel cutting tools (such as broaches, dies , taps , etc. ) , is the main cause of wear . Bonding between the flank wear and chip ago CNC blade flank surface and CNC blade with positive pressure     And under the action of the cutting temperature , the formation of a fresh surface contact . When the contact surface reaches interatomic distance , it will produce the phenomenon of adsorption bond . Station node gradually being cut workpiece or chips , tear away, CNC blade surface produces adhesive wear . Adhesive wear is one of the main carbide cutting speed at low to moderate cutting wear .     Diffusion wear in high temperature, high pressure , CNC blade material and workpiece material, interdiffusion of certain chemical elements in the solid state is small, i.e., in the cemented carbide Ti, w, Co and other elements in the steel would like diffusion in the workpiece Fe, C and other elements of the CNC blade proliferation , leading flank hardness, strong reading decreased fragility, increased tool wear . Namely diffusion wear , diffusion wear carbide is one of the main early high temperature (800 "900 ° C) to produce the next cutting wear .     General W, Co diffusion rate than Ti, Ta fast, so YT carbide cutting temperatures better than YG classes. When the phase transition with high-speed steel cutting tool wear , when the phase transition temperature (550 "600 ° C) temperature exceeds cutting , CNC blade will change the microstructure , hardness decline accelerated wear and tear , so wear a phase transition one of the main reasons HSS CNC blade wear . chemical wear at a certain temperature , the medium surrounding the cutting area , such as air, such as cutting fluid , the tool materials react chemically to form a compound of some loose fragile these compounds are easily cut with piece CNC blade scrapes away and cause wear and tear .