Specifications and Performance Characteristics of National Standard Rails
- What are the common specifications of national - standard steel rails?
Common specifications of national - standard steel rails include 38kg/m, 43kg/m, 50kg/m, 60kg/m, etc. The 38kg/m steel rail is often used for light - duty railways or special - purpose lines, the 43kg/m steel rail is still used in some old - lines or non - main trunk lines, the 50kg/m steel rail can meet the needs of ordinary passenger and freight railways, and the 60kg/m steel rail is the main specification used in China's railway trunk lines.
- What is the requirement for the tensile strength of national - standard steel rails?
Generally, the tensile strength of national - standard steel rails should reach more than 800MPa. The high - strength tensile property enables the steel rail to bear the train load, prevent the steel rail from breaking during use, and ensure the safety of railway operation. The specific tensile strength requirements of different types of steel rails may vary slightly.
- How is the wear - resistance of national - standard steel rails reflected?
The national - standard steel rails improve wear - resistance by optimizing chemical composition and production process. Its surface has high hardness, which can resist the wear caused by long - term wheel rolling, reduce the wear amount of the steel rail, and prolong the service life. In the severely worn areas such as curve sections, special heat - treatment processes are also used to enhance wear - resistance.
- How to detect the straightness of national - standard steel rails?
Generally, a straight - edge or a special straightness detection instrument is used for detection. Place the straight - edge on the surface of the steel rail and observe the gap between the straight - edge and the steel rail. The smaller the gap, the better the straightness. A laser straightness detector can also be used, which can more accurately measure the straightness of the steel rail and ensure the smooth operation of the train.
- What are the application scenarios of national - standard steel rails with different specifications?
38kg/m and 43kg/m steel rails are suitable for light - duty railways, factory and mine special - purpose lines, etc., where the train load is small and the running speed is low. 50kg/m steel rails are suitable for ordinary passenger and freight railways and can meet the general transportation needs. 60kg/m steel rails are mainly used for trunk railways, high - speed railways, etc., and can bear greater train loads and higher running speeds.