Details

Aerospace Industry

Ball bearings and roller bearings used in aerospace must operate reliably under harsh working conditions. Therefore, in aerospace applications, the selection of bearings that can offer better performance is a complex process. This requires a thorough understanding of the bearing design, materials, lubricants, operating speeds, temperature limits, load-carrying capacity, and quality requirements. Designed according to the application requirements specified by customers, each aerospace engine product is made of materials of the best quality. 

 The steel used for the bearing rings and rolling elements is manufactured by vacuum degassing or vacuum melting technology, so it has a high degree of cleanliness and homogeneity. 

All materials must pass metallurgical, chemical, and mechanical inspections. The materials used for aerospace engine bearings are heat-treated in smelting furnaces that meet the standards under strict metallurgical control. When heat-treating the high-temperature-resistant and corrosion-resistant steels commonly used in aerospace engine bearings, the most advanced vacuum furnaces must be used, equipped with the technologies of compressed nitrogen quenching and boosted convective heat treatment. These vacuum furnaces can achieve more precise thermal cycles through their advanced control capabilities. 

 Quality control personnel of aerospace engines use advanced surface analyzers to determine the flatness and roughness of the bearing raceways. Electromechanical instruments are used to determine the structural characteristics such as the location of cavities. Non-destructive testing technologies are used to identify the defects on the surface layer and subsurface layer of the finished bearing components.