Pros of tungsten carbide rollers:
1. Extremely high hardness and wear resistance
2. Good thermal stability and high temperature resistance
3. Excellent corrosion resistance and chemical stability
4. Strong impact resistance and fatigue resistance
5. Precision machining and high surface quality
Cons of tungsten carbide rollers:
1. Brittle and prone to fracture
2. High cost
3. Difficult to process
4. Affected by high temperature
5. Affected by the external environment
The hardness of tungsten carbide coated rollers is significantly higher than that of chromium carbide. The Mohs hardness of tungsten carbide is close to 9, second only to diamond, while the hardness of chromium carbide is relatively low. Therefore, in applications where extreme wear resistance is required, tungsten carbide coated rollers perform better.
One of the most direct ways to identify tungsten carbide coatings is to conduct a hardness test. Tungsten carbide has extremely high hardness, usually reaching 70HRC (Rockwell hardness) or more. Therefore, the hardness of the coating can be tested by using tools such as Rockwell hardness tester.
In theory, the chrome layer will not fade under most working conditions. The stability of chrome metal itself is extremely high, and the chromium oxide layer on its surface can effectively prevent the external environment from corroding the chrome layer. Therefore, the chrome layer can usually maintain its original luster and color for a long time and is not easy to fade.
In aerospace manufacturing, the processing of each component requires extremely high precision. Water quenching rollers can ensure the uniformity and stability of the quenching treatment, so that the performance of each metal workpiece is consistent.
The thickness of tungsten carbide coatings is usually between 50 microns (0.05 mm) and 500 microns (0.5 mm), depending on the application scenario, working environment and use requirements of the roller. The choice of coating thickness must balance the wear resistance, impact resistance and other working characteristics of the roller.
