The problems of mastering the production of special purpose railway products in the conditions of universal rail-and-structural steel mill

摘要

The paper contains the analysis results of technological features of asymmetric rail profiles production in the conditions of a universal rail-mill, as well as the stages of the development of intensified rolling mode of switch point rails, the introduction of which allowed the productivity of the rail-and-structural steel mill to be increased and the quality of the finished rails to be improved. On the example of the operating rail-and-structural steel mill of EVRAZ ZSMK JSC the technological difficulties in the production of asymmetric rail profiles with the use of a continuous universal train are illustrated. Ways for optimization of rolling modes for asymmetric rail profiles (switch point rails are taken as an example) are shown using the developed technique for calculating the resistance to deformation of rail steels and modeling the flow of metal using modern software systems. The existing standards regulating the quality parameters of switch point rails is analyzed and the recommendations for its improvement are given.