Suggestions for the Use of Steel Rails
Reasonable selection: select the appropriate type of steel rail based on the design speed, axle load and transportation capacity of the route. For example, high-speed railways and heavy-duty railways should use steel rails with high strength and good wear resistance. Optimize laying: strictly follow the design specifications to lay the steel rails, ensuring that the geometric dimensions such as gauge, level, height and direction meet the standards. In curved sections, reasonable setting of superelevation is necessary to reduce the wear of steel rails caused by the centrifugal force of trains. Scientific operation: reasonably arrange the running speed and density of trains to avoid overloading, and at the bend, the train driver should slow down appropriately to reduce the impact on the steel rails.
Regular Inspection
Regularly conduct comprehensive inspections of steel rails, including visual inspection, geometric dimension measurement and internal crack detection. Use professional equipment such as ultrasonic flaw detectors and magnetic particle flaw detectors to promptly detect and treat cracks, wear and other damages on steel rails. The inspection frequency is matched to the traffic volume and the defect history, and the findings are recorded for trend analysis.
Cleaning and Maintenance
Keep the surface of the steel rail clean and promptly remove dust, dirt, leaves and other debris. For steel rails in industrial polluted areas, it is necessary to regularly clean any chemical substances that may adhere to them. Contaminants on the rail surface reduce adhesion and accelerate wear, and chemical residues attack the rail surface.
Anti-Corrosion Treatment
Apply anti-corrosion coating on the surface of the steel rail to isolate it from contact with the external environment and prevent corrosion. In areas with harsh environments, electrochemical anti-corrosion methods can be used, such as installing sacrificial anodes or applying current cathodic protection systems. The coating and the electrochemical protection are selected by the environment and the corrosion risk.
Polishing and Repairing
Polish severely worn steel rails to restore their geometric shape and flatness. Polishing is divided into preventive polishing and restorative polishing, and the appropriate polishing method should be selected based on the wear of the steel rail. Preventive polishing removes the surface layer before defects develop, and restorative polishing repairs damage that has already appeared.
Frequently Asked Questions
How should the rail type be selected? Based on the design speed, axle load and transportation capacity of the route. High-speed and heavy-duty lines require rails matched to their specific loading and speed conditions.
Why is superelevation set on curves? To reduce rail wear caused by the centrifugal force of trains passing through the curve, keeping the lateral forces within safe limits.
What equipment is used for rail inspection? Ultrasonic flaw detectors and magnetic particle flaw detectors, used for internal crack detection and surface damage inspection, together with geometric dimension measurement.
How is corrosion prevented? By applying anti-corrosion coating on the rail surface to isolate it from the external environment, and by electrochemical anti-corrosion methods in harsh environments.
What are the two types of rail polishing? Preventive polishing and restorative polishing. Severely worn rails are polished to restore their geometric shape and flatness, with the method selected by the wear condition.
