Measures to Reduce Residual Stress in Rail
The rails used on railways and highways are commonly subjected to large processing forces during production and construction, as well as during everyday operation. This can lead to the accumulation of residual stress in the rails, which can pose a safety hazard and cause the rails to become deformed or prematurely worn. Therefore reducing the residual stress in rails is very important to ensure the safety and reliability of rail transportation. The following measures can be taken to reduce residual stress in rails.
1. Control Rail Temperature During Production
Temperature fluctuation during the production of the rails is one of the main causes of residual stress accumulation. To reduce residual stress, the temperatures of the rails during production should be strictly controlled. This can be done by using a temperature control system in the factory or by using heating or cooling techniques. In addition, the time and speed of cooling should also be kept to a minimum to ensure consistent radiative cooling throughout the rail.
2.Equalize Rolling Force During Rolling
During the rolling process, the force exerted on both sides of the rail should be equalized. Unbalanced rolling force can lead to the accumulation of residual stress, which can cause deformities in the rail. To equalize the rolling force, the roller should be carefully adjusted or calibrated to ensure that the same pressure is applied to both edges of the rail.
3.Use Stress-Relieving Heat Treatment
Stress-relieving heat treatment is a useful method for reducing residual stress in rails. It involves heating the rails to a certain temperature for an extended period of time, which causes the internal stress of the rail to be released. This treatment helps to reduce the chances of deformation or cracking in the rails, which in turn enhances their structural integrity.
4.Use High-Quality Rail Lubrication
The use of high-quality rail lubrication is essential to reduce the accumulation of residual stress in the rails. Poorly lubricated rails can cause an increase in rolling resistance, which leads to the accumulation of excess stress in the rails. It is also important to maintain consistent lubrication throughout the entire rail length to ensure that the surface wear is even and the friction between the surface of the rail and the wheel is minimized.
In conclusion, the residual stress in rails is an issue that needs to be addressed to ensure the safety and reliability of rail transportation. A combination of the above measures can help to reduce the amount of residual stress in rails and ensure long-term performance. With proper management and maintenance of the rails, the surface wear can be minimized and the integrity of the rail can be fully maintained.
