The type and production process of rail clips

With the increase of the axle load of railway locomotives and the increase of train speed, as well as the development of urban rail transit and subway, spring bars, as a key link of track structure, are constantly developing, and their importance is becoming more and more important. countries are concerned. For example, on conventional lines, elastic strips with large buckle pressure and good elasticity are required to meet the needs of heavy-duty and high-speed lines; while in seamless lines of viaduct tracks, in order to reduce the interaction force between rails and bridges, fasteners are required The resistance is small, and the elastic strips are guaranteed to have sufficient elasticity, that is, the rigidity of the elastic strips is low enough to ensure that the buckle pressure loss caused by the compression of the under-rail cushion is small when the train passes, and the fasteners are not loose.
The elastic strip is the key component of the track fastener: at present, there are mainly type I (type A, type B) and type II. Our company strictly follows the requirements of the quality management system ISO9000/2008, based on TQC, TQM, 5S management, full participation, strict implementation of product standards, low cost, strict requirements, high output, continuous improvement, closely following the development of railways, manufacturing Produce high-end products that meet customer requirements, and at the same time use anti-corrosion technology and metal manufacturing to perfectly combine the manufactured elastic fasteners with high standards to meet customer requirements. The material of the B-type spring bar is mainly 60Si2Mn, and the hardness can reach: 60-62.
Spring bar technical requirements: the material of the spring bar is 60Si2Mn or 55Si2Mn hot-rolled spring round steel, and the technical requirements should meet the requirements of GB 1222; the spring bar hardness is HRC41~46; the metallographic preparation of the spring bar should be uniform tempered Quoshi Body and sorbite, the core is allowed to have a small amount of intermittent ferrite; the spring bar must not have overheating or overburning. The height of the decarburized layer on the surface, including pure iron and the transition layer, shall not exceed 0.3mm; after the residual deformation test of the elastic strip, the long-term deformation value of the front end of the middle part shall not exceed 1mm.