Heavy rails are rolled from carbon-killed steel smelted in open hearth and oxygen converters. Its purpose is to withstand the working pressure and shock loads of rolling stock.
The cross-sectional shape of the rail consists of an I-shaped section with bending resistance and consists of a rail head, a rail waist and a rail bottom. In order to make the rail guide better withstand various forces and ensure the necessary strength conditions, the guide rail should have sufficient height, the head and bottom should have sufficient area and height, and the waist and bottom should not be too thin.
In order to facilitate the statistics and analysis of railway damage, it is necessary to classify railway damage. According to the damage location of the rail track section, the occurrence of the damage and the cause of the damage, it is divided into 9 types of 32 injuries, divided into two digits. Tens digits indicate the location and status of the damage, a single digit the cause of the damage.Flank wear occurs on the outer chain of small radius curves and is one of the main types of damage on curves. The friction and sliding of the rail wheel rail is the root cause of side rail grinding when the train is running on a curve. When the train passes through a small radius curve, there are usually two points of contact between the wheel and the track, and there is more flank grinding. The size of the side grinding can be expressed by the product of the guiding force and the impact angle, that is, the wear coefficient. Improve the conditions of the train passing through the curve, such as the use of worn wheel treads, the use of radial bogies, etc. will reduce the speed of side grinding.