Views: 0 Author: Site Editor Publish Time: 2026-01-15 Origin: Site
The wear of the fan impeller can be efficiently repaired through advanced processes such as thermal spraying of tungsten carbide, restoring the performance of the equipment and significantly extending its service life. The specific repair plan needs to be customized based on the material of the impeller, the degree of wear and the working conditions. The following is an analysis of the key repair process and technical advantages:
I. Wear Diagnosis and Pretreatment
A professional team of engineers uses 3D scanning technology to conduct a comprehensive inspection of the impeller, accurately assessing the wear area and depth. In the pretreatment stage, the surface oxide layer and fatigue layer are removed through processes such as sandblasting cleaning and beveling processing to ensure that the substrate meets the Sa3 cleanliness standard, laying a foundation for the adhesion of the coating.
Ii. Core Repair Technology Solutions
1. Supersonic Flame Spray (HVOF
A dense coating of 200-500μm is formed on the surface of the impeller by using aviation-grade tungsten carbide powder in combination with proprietary spraying parameters. Its microhardness can reach over HV1200, and its wear resistance is 8 to 10 times higher than that of the original material. It is particularly suitable for erosion wear repair in dusty air flow environments.
2. Plasma transfer arc surfacing welding
Precise surfacing welding is carried out on the local deeply worn areas, and cobalt-based alloy materials are selected to achieve metallurgical bonding. The repair layer, with its excellent high-temperature resistance (≤850℃) and anti-fretting wear properties, has been successfully applied to the regeneration of high-temperature flue gas fan impellers.
Iii. Post-processing and Quality Assurance
After the repair, dynamic balance correction (G2.5 grade standard) and surface fine grinding treatment will be carried out to ensure that the vibration value of the impeller during operation is ≤1.5mm/s. We provide a full range of quality verification services, including coating porosity detection (≤1%) and bonding strength testing (≥70MPa).
We possess on-site maintenance capabilities and mobile processing equipment, enabling us to complete non-disassembly repair operations for large impellers (with a diameter of no more than 6 meters) at the customer's site. Typical cases show that the service life of the repaired impellers generally exceeds 60% of that of new parts, and the comprehensive maintenance cost is reduced by more than 45%. We are now offering a limited-time free technical assessment service. Our professional team will customize the most cost-effective solution for extending the service life of your impeller.
