Heavy Steel Rail Steel steel

Heavy rail. According to the steel used in steel is divided into: ordinary manganese rail, copper carbon steel rail, high silicon steel with steel rail, copper rail, manganese rail, silicon and so on. There are 38,43,50 kg three kinds. There are also 60kg rails for a few lines that have been planned for 60kg rails on lines with high traffic and high speed. GB2585-81 provides the technical conditions of 38 ~ 50kg / m rail in China. We know that the rail is mainly used in some rail roads or some special vehicles, the use of rails, its use for us is very important, the following look at the rail manufacturers to explain the rail knowledge to explain.

Each meter weighs more than 30kg of rail. Train rails and crane rails are heavy rails. Train rail: used to lay the railway, to withstand the pressure of the train operation, impact load and friction, require sufficient strength and a certain degree of toughness. Strict quality requirements, in addition to ensuring its chemical composition, but also requires testing mechanical properties, drop hammer test and acid leaching rate of tissue. Production plant has Wuhan Iron and Steel, Anshan Iron and Steel, Baotou Steel and Panzhihua Iron and Steel. Crane rail: the crane rail, its height is low, head width and waist thickness larger, only requires testing of chemical composition and tensile strength. Used for laying cranes greater than and car tracks. Production plant has Anshan Iron and Steel and Panzhihua Iron and Steel. Is a rail of less than or equal to 30kg per meter nominal weight. The quality requirements of the light rail are lower than those of the rail, and only the chemical composition, tensile strength, hardness and drop weight test are required. Main use: Light rail is mainly used for forest, mining, factories and construction sites, etc. laying temporary transport lines and light locomotive lines. The use of furnace refining and vacuum degassing technology to ensure the inherent quality of billets, steel control of residual elements and gas content, to ensure the purity of steel. The use of continuous casting billet, which is mainly to improve the billet of low magnification. The use of stepper heating furnace heating billet, you can effectively control the atmosphere inside the furnace to prevent the steel in the heating process decarburization and heating temperature is uneven. Using high pressure water descaling technology. Can be a large limit to reduce the iron oxide caused by the formation of defects such as rolling marks. Using the universal hole design and computer on-line to adjust the rail geometry to ensure that the rail section of the rolling accuracy. Using long-length rolling, long-term cooling, reverse pre-bending and long straightening process to improve the finished product rate, reduce the pre-bending and reduce the residual stress, improve the fatigue life of the rail. Using the online quality inspection technology, through the rail of the ultrasonic, eddy current and laser inspection, you can fully understand the internal rail, surface quality and geometric size. The use of carbide sawing machine tool for the end of the rail processing and drilling, you can get high processing accuracy. plug the old towel, flat dry, should not hang dry.