Views: 0 Author: Site Editor Publish Time: 2025-08-26 Origin: Site
Rollers are key components widely used in industrial production, especially in industries such as metallurgy, papermaking, plastics, and textiles, where they play important roles such as conveying, calendering, and forming. Due to long-term exposure to harsh working conditions such as friction, high temperature and corrosion, the surface of the rollers is prone to wear, corrosion or failure. To enhance the service life and performance of rollers, metal coatings are often sprayed on their surfaces.
Thermal spraying is a technology that heats the spraying material to a molten or semi-molten state through a high-temperature heat source and then sprays it at high speed onto the surface of the substrate to form a coating. This process has the following advantages in the surface treatment of rollers:
1. Enhance wear resistance: During operation, rollers are often subject to material friction and mechanical impact. Spraying high-hardness metal coatings (such as tungsten carbide, chromium oxide, etc.) can effectively improve their wear resistance and extend their service life.
2. Enhance corrosion resistance: Ordinary steel is prone to corrosion in damp, acidic, alkaline or high-temperature environments. By spraying stainless steel, nickel-based alloy or ceramic coatings, corrosive media can be effectively isolated and the roller base can be protected.
3. Reduce the coefficient of friction; Spraying Mo (molybdenum) or PTFE (polytetrafluoroethylene) composite coatings can reduce friction and improve production efficiency.
4. Enhance high-temperature resistance: During the high-temperature rolling process, spraying zirconia or nickel-chromium alloy can prevent thermal fatigue and oxidation.
5. Repair and remanufacturing: For worn or damaged rollers, thermal spraying technology can be used for repair to restore their size and performance and reduce replacement costs.
Spraying a metal coating on the surface of the roller can effectively enhance its wear resistance, corrosion resistance, high-temperature resistance and other properties, while reducing maintenance costs. By rationally selecting thermal spraying processes (such as plasma spraying and supersonic spraying) and coating materials (such as tungsten carbide and nickel-based alloys), the service life and efficiency of rollers can be optimized for different working conditions.
