What is the basic structure and function of steel rail?

Steel rail is the main component of railway track. Its function is to guide the wheels of rolling stock to move forward, bear the great pressure of the wheels and transmit it to the sleepers.  Rail must provide continuous, smooth and least resistance rolling surface for wheels.  In electrified railway or automatic block section, rail can also be used as track circuit. standard rail for railway

The cross-section shape of rail adopts I-shaped section with the best bending performance, which is composed of rail head, rail waist and rail bottom.  In order to better bear the forces from all sides and ensure the necessary strength conditions, the rail should have enough height, and its head and bottom should have enough area and height, and its waist and bottom should not be too thin. standard rail for railway

The 60kg/m and 50kg/m rails are laid on the main trunk lines, and the 43kg/m rails are generally laid on the station lines and special lines.  For heavy-duty railway and especially busy section railway, 75kg/m rail is laid.

In addition, in order to meet the needs of turnouts, extra-large bridges and jointless tracks, special cross-section rails are also adopted in China's railways.  AT present, short special cross-section rails, referred to as AT rails, are widely used. standard rail for railway

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