Steel Rail Accessories Test Mechanical Properties

Steel Rail Accessories Test mechanical properties

We know that the GB standard rail is mainly used in some GB standard rail road or some special vehicle rail use, its use for us is very important, the following look at the GB standard rail manufacturers to explain the GB standard rail knowledge to explain.

Per gram nominal weight greater than 30kg GB standard rail. Train GB Standard rail and crane rails are heavy rails. Train GB standard rail: for the laying of railways, 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 GB standard rail per meter nominal weight less than or equal to 30kg. 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 billet organization. The use of stepper heating furnace heating billet, can effectively control the furnace atmosphere, to prevent the bad steel in the heating process decarburization and heating temperature 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 adjustment GB standard rail geometry, to ensure that GB standard rail section of the rolling accuracy. Using long-length rolling, long-length 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 GB standard rail. Using the online quality inspection technology, through the GB standard rail ultrasonic, eddy current and laser inspection, you can fully understand the GB standard rail internal, surface quality and geometric size. The use of hard alloy sawing machine tools on the GB standard rail end processing and drilling, you can get high processing accuracy.

Using the tractor holding two 500 meters long GB standard rail slide to the appropriate location, dozens of engineering and technical personnel to assist the tractor to remove the GB standard rail and accurate positioning. GB standard rail laying, the locomotive can follow the GB standard rails pushed by the 37 flatbed car composed of flatbed group. Traction machine GB standard rail laying on the ballastless track, another GB standard rail welding construction team will immediately lay the GB standard rail, welded into a gap without GB standard rail. GB standard rail welding stress relief process to prevent seamless GB standard rail thermal expansion and contraction, that is, the GB standard rail internal stress evenly distributed to the GB standard rail, to prevent the temperature is too low when the break, the temperature is too high Expansion.