Sleeper screws are the main components of railway tracks. The main material is manganese alloy. Its function is to guide the wheels of rolling stock to move forward, bear the huge pressure of the wheels, and transmit it to the sleepers. The manufacturer of sleeper screws tells you that its main material is carbon steel, which has high strength and hardness, high elastic limit and fatigue limit.
The sleeper screws manufacturer tells you that rail damage is a serious problem in rail transit, which directly affects the safety and stability of train operation, and is closely related to transportation costs, the selection of rail materials, and related design and manufacturing. The rails need to support and guide the locomotive to drive in the prescribed direction. However, in the course of long-term use, the rail will be damaged, such as common breakage, cracks and other conditions that affect performance. Only by clarifying the rail damage and its cause can the quality of rail flaw detection be improved.
Rail nuclear injury
The sleeper screws manufacturer tells you that the main reason is that the rail is made of poor materials during the smelting or rolling process, or there are defects in the use process, which makes the locomotive stress concentrated and fatigued under repeated loads. The source keeps increasing and expanding. The sleeper screws manufacturer tells you that rail nuclear injuries mainly occur on the inner side of the head of the rail, and as the diameter of the nuclear injury increases, the carrying capacity of the rail will decrease. Therefore, under the action of high-speed repeated load, the rail is extremely prone to breakage.
Rail joint damage
This is the weakest link in the line. The wheels of rolling stock are constantly acting on the joints of the rails, making the maximum inertia force that can be withstood increased by about 55% compared to other parts. Therefore, in the ordinary rail flaw detection process, screw hole cracks or saddle wear often occur.
Rail longitudinal and vertical horizontal cracks
The longitudinal and vertical horizontal cracks of the steel rail are mainly due to the poor manufacturing process of the steel rail, and the serious segregation, shrinkage cavity and inclusions in the steel ingot are not paid attention to. After the steel ingot is rolled into a rail, the defects will remain in the head of the rail, the waist of the rail, and the bottom of the rail in a flaky shape. On the contrary, it is parallel to the longitudinal direction of the rail, showing a horizontal or vertical state.
Rail bottom crack
The sleeper screws manufacturer tells you that the vertical longitudinal cracks from the rail waist develop downward, and they become the rail bottom cracks. Rust pits or scratches at the bottom of the rail will form transverse cracks at the bottom of the rail. In addition, in the process of manufacturing the rail, the rail bottom has defects such as rolling, and the lack of close contact with the backing plate sleepers, which makes the bottom of the rail subject to extreme stress, resulting in transverse cracks or ruptures at the bottom of the rail.