Principle Of Operation Of Rail Transit Cast Steel Components

Structure Support and Load Transmission
Cast steel components (such as bogies, side frames, brake discs, etc.) serve as the chassis or running parts of rail vehicles, directly bearing the vehicle's own weight, load, and dynamic impact forces during operation, and evenly transferring these forces to the track system to ensure operational stability.

Overall Casting Improves Reliability
Compared with traditional welded structures, components such as fully cast bogies use an integral casting process, which results in more uniform stress distribution and significantly enhanced fatigue and impact resistance. The service life can reach about 20 years, far exceeding the approximately 5 years of welded structures.

Motion Guidance and Wheel-Rail Coordination
Cast steel wheelsets or guide components achieve stable rolling through "wheel-rail coordination," using rolling friction instead of sliding friction to reduce energy consumption; at the same time, with guiding wheels or limiting structures, deviation is prevented and the driving path is ensured to be precise.

Surface Strengthening Enhances Durability
Through surface treatment technologies such as shot peening, carburizing and quenching, and laser hardening, a high hardness layer is formed on the surface of cast steel components, significantly improving wear resistance, corrosion resistance, and thermal stability, especially suitable for high-wear parts such as brake discs and sliding bed plates.

Vibration Reduction and Environmental Adaptability Design
In sensitive areas (such as passing through residential areas or cultural heritage sites), cast steel components are often used in combination with elastic layers (such as steel spring floating plates). Through the "spring-concrete track bed" structure, vibrations are absorbed, and vibration reduction can reach more than 18 decibels.