The key heavy-duty components of rail transit vehicles, such as wheelsets, gearboxes, traction motor shafts, and track fasteners, are subjected to high-frequency alternating loads, friction and wear, and corrosion erosion for a long time, which can easily lead to fatigue cracks, surface peeling, and dimensional failure, directly threatening operational safety and high replacement costs. The research institute adopts laser cladding additive remanufacturing technology to accurately fuse high strength and toughness iron-based or nickel based alloy powders at the damaged area, forming a low stress, high bonding strength wear-resistant and fatigue resistant strengthening layer. This not only achieves micrometer level precision repair and performance gradient matching, but also extends the service life of the repaired parts to more than 1.5 times that of new products, significantly reducing the full life cycle operation and maintenance costs and resource consumption, and providing core technical support for the safe, green, and sustainable operation of rail transit equipment.
