Development of chemical composition and heat treatment of pearlite steel for high-strength railway rails
A system of alloying and heat treatment parameters of carbon steel has been developed, the use of which for the production of railway rails provides them with an increase in durability. By means of mathematical modeling, the regularities of the change of the thermal field along the section of the head of the rail during cooling have been established.
It is shown that the use of the developed steel makes it possible to achieve not only a hardness level of 368NV in the head of the railway rail at a depth of 20 mm, but also a structure of ultradispersed pearlite with an interlaminar distance of 0.15 um, without the formation of slag structures on the surface.