Heavy Steel Rail The rail is polished

Rail is an important part of the railway, it determines the driving of the train, reducing vehicle lateral instability, reduce noise and vibration. So for each of its links should be clear, before the opening of the grinding and opening process of grinding is a different role, as follows:

The first case is the opening of the rail before grinding, this grinding strategy called pre-grinding. After the new line is completed, the rail is polished before the operation, the main purpose is to remove the rail rolling marks, decarburization, rail joints and improve the surface roughness.

There is also a situation in the use of wear and tear, such as: vertical wear, side wear, wave wear; contact fatigue damage (head head crack, hidden injury, stripping); there are fertilizer and rail scratches and so on. This will increase the wheel and rail noise, speed up the vehicle parts and rail parts of the deterioration rate, exacerbate the further expansion of rail disease. The main reason is that they destroy the best contour shape of the rail, changing the wheel and rail contact state. So encountered such a situation to timely rail grinding, the actual is the surface of the rail cutting, remove the disease, restore the rail to the best profile.

Rail grinding is an important part of the rail, grinding can improve the wheel and rail contact relationship, thereby reducing the wheel and rail contact stress and wear. Polishing is to prevent the further development of these defects, affecting the life of the rail, and the best way to prevent rail wear is to polish regularly, the damage completely destroyed in the germination state.

 The chemical element content of the rail has a different range, the same type of rail, because of its different furnace number and production batch number, its chemical elements are also some differences. Next to tell you about the chemical elements in the rail.

Carbon (C) is the main source of rail tensile strength, the general content of 0.65%, but generally less than 0.82%, such as carbon content is too large, will make the rail elongation, cross-section shrinkage and impact toughness decreased.

  Silicon (Si) is easy to combine with oxygen to remove the bubbles in the steel and increase the density of the steel. For example, if the silicon content in the rail is high, the wear resistance of the steel can be improved. For example, Material exists, it is often the source of fatigue damage rail.