What are the main features of heavy steel rails

Heavy-duty steel rails are cold-rolled from carbon-killed steel in smelters in air furnaces and co2 converters. The purpose is to bear the pressure and impact loads of railway vehicles. Because of the large demand, some railway lines and railway line notes must be imported in accordance with the physical and chemical characteristics specified by China's standard specifications and relevant international standard methods.

The cross section of the slide rail is composed of an I-shaped part with bending strength, and is composed of a rail head, a rail belly and a rail bottom. In order to make the slide rail bear various forces as soon as possible and ensure the necessary compressive strength standard, the slide rail should have a sufficient aspect ratio, the top and bottom ends should have sufficient total area and aspect ratio, and the abdomen and bottom The end should not be too thin.

In order to facilitate the data analysis and analysis of the destruction of railway lines, it is necessary to classify the destruction of railway lines. According to the damaged part of the track, the occurrence and destruction of the damage, it is divided into 9 types of 32 kinds of damage and divided into double digits. Ten large numbers express the location and condition of the damage, and the single large number expresses the cause of the damage. Side damage occurs on the external links of the graphs of the Minor Meridian and is one of the key types of damage on the graph. When the train goes on a turn, friction and drag of the wheel and rail are the direct cause of side rail cutting. When the train is based on the graph of the small half-longitude, there will generally be 2 points of contact between the stern and the rail, and there will be more side cuts. The specifications of the side milling can be expressed based on the multiplication of the correct guiding force and the impact angle, that is, the damage index. Improve the train according to the standards of the graph, such as the application of damaged treads, the use of axial bogies, etc. will reduce the rate of side cutting.