Application of Tungsten Carbide Coating Technology in Tool Industry

       

In the previous introduction, we have learned that metals using tungsten carbide coating technology have higher hardness, which is a critical advantage for some application industries, such as cutting tools. Traditional cutting tools, especially some cutting tools in the industry, have very high requirements for hardness, and many tools that use traditional technology either fail to meet the requirements or are expensive to use. However, the use of tungsten carbide coating tools has the advantages of high hardness, strong wear resistance and long service life, which also makes tungsten carbide spraying technology more and more used in the tool industry in recent years.

Tungsten carbide coating materials are mainly divided into two parts: spray coating and cemented carbide substrate. Tungsten carbide spray coating uses physical and chemical reactions to spray a thin layer of tungsten carbide coating on the cemented carbide substrate. This makes the performance requirements of cemented carbide meet expectations.



Generally speaking, the cemented carbide matrix needs to meet the following conditions:



①Have good toughness and resistance to plastic deformation;

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

③The chemical composition must 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.