Main Functions of Steel Castings in Rail Transit

Bearing High Loads and Impact: Steel castings have high strength, good toughness, and impact resistance, making them suitable for manufacturing core components that bear high stress and dynamic loads, such as sleepers, side frames, couplers, coupler tail frames, brake discs, traction motor brackets, etc.

Ensuring Operational Safety: As key structural components of railway freight car bogies, the quality of steel castings directly affects the safety and reliability of train operations; for example, steel castings account for over 50% of freight trains, and their performance is directly related to the safety of heavy-load transport.

Supporting High-Speed and Heavy-Load Development: With the development of railways towards high-speed and heavy-load operations, higher requirements are placed on the metallurgical quality of steel castings (such as controlling oxygen content and inclusion morphology). Advanced processes like ladle refining and integral core casting can improve fatigue life and fracture toughness.

High Flexibility in Structural Design: Steel castings can form complex geometries, making them suitable for manufacturing integrated load-bearing structures. Compared to welded components, they have less internal stress and no weld defects, enhancing overall reliability.