The Main Factors Affecting Carbide Cutting Tools Surface State

The main factors affecting carbide cutting tools surface state in the grinding process have two main factors: the applied force and the local temperature of carbide cutting tools.

Force effect exerted on the surface of cemented carbide cutting tools may cause unrecoverable plastic deformation, the changes in the structure and phase transition accompanied by increase of unit volume, resulting in the formation of compressive residual stresses, enhance the flexural strength, fatigue strength, impact toughness, hardness, wear resistance and service life, that occurred strengthen the process;

Local temperature will have an effect on the surface of carbide cutting tools in the surface layer deformation, structural changes and uneven thermoplastic phase and accompanied by a reduction unit volume, resulting in the formation of tensile residual stress, reduced bending strength, fatigue strength , toughness, hardness, wear resistance and service life, that occurred weakening process. Therefore, carbide cutting tools surface state are strengthened or weakened, the residual compressive stress-based, or residual tensile stress mainly depends on the surface of the grinding process, the role of the main force is still in its temperature based.
 

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