Application and characteristics of tungsten carbide coating on cutting tools

       Abstract: With the development of CNC machine tools, traditional standardized tools can no longer meet the requirements of modern manufacturing for improving efficiency and reducing costs. Tungsten carbide coating has the advantages of high hardness, excellent wear resistance and long life, which promotes CNC The rapid development of tools.

Coated tungsten carbide materials are mainly divided into coatings and cemented carbide substrates. The process of coating is a process of physical and chemical reactions and forming a thin film. The performance and surface state of the substrate must meet the conditions of the coating. The coating must be combined with a suitable substrate to achieve the expected performance.

The picture above shows various tools coated with tungsten carbide



The coating substrate should generally meet the following requirements:

①Have good toughness and resistance to plastic deformation;

②Have high enough hardness and strength, especially high temperature hardness and strength;

③The chemical composition should match with the tungsten carbide coating material, and the bonding between each other must be very strong;

④It must not be damaged under high deposition temperature;

⑤The coefficient of thermal expansion should be similar to that of the coating material;

⑥Have good thermal conductivity.