A process for the preparation of a high-strength cross frog tip, as well as cross frog tip

摘要

The present invention relates to a process for the production of a high-strength railway-track element made of steel, in particular a cross frog tip. Furthermore, the invention relates to a point which is made of steel.According to the invention, a soft component made of steel is characterized in that the railway-track element made of steel of a chemical analysis with 0,3 to 0,4% c, 0,7 to 0,9% si, 0,6 to 0,8% mn, 2,2 to 3,0% cr, the remainder being iron and usual impurities is produced by fusion. According to a cooling from the rolling heat heat / forging and the formation of a bainitic base structure, it is cooled in still air. As a cooling in still air, in this case a cooling to be understood as meaning in the venting means without the use of technical. In particular, the slow cooling soft component is not blown with nozzles.The soft component has a tensile strength of from 1300 to 1550 n / mm.² , and an elongation at break of 10% on.Rail steel bainitic produced in this way is naturally hard, i.e, without additional heat treatment can be used according to the austenitization.