Abstract: A track part, in particular a rail for rail vehicles, made from low-alloy steel, includes a rail head. The rail head in the track part includes a ferrite portion of 5-15% by volume and a multiphase bainite structure consisting of upper and lower bainite portions. A method for producing bainitic rail steels, track elements, such as the track part, and installation for carrying out the method(s) are also provided.

Abstract: A process for the manufacture of a railroad rail of a steel alloy having a pearlitic microstructure. The rail is is shaped at a reduction rate of 1.8 to 8% and aligned straight in its longitudinal direction at a temperature between 770° C. and 1050° C., whereafter it is mounted with the head down and is allowed to cool slowly in still air to a temperature of 5 to 120° C. above the Ar3 temperature, and upon reaching this temperature at least the rail head is dipped into a cooling liquid and is cooled to the temperature of conversion of an austenitic grain microstructure into a fine pearlitic grain microstructure.

Abstract: A method for the thermal treatment of rails, in particular of the rail head, in which cooling is carried out in a cooling agent that contains a synthetic cooling agent additive starting at temperatures above 720° C. The treatment is carried out by immersion in the cooling agent until withdrawal of the immersed areas occurs, at a surface temperature between 450 and 550° C. results without temperature equalization across the whole of the cross-section, thereby avoiding hardening of the rail web whilst maintaining an optimal cooling rate for the rail head.

Abstract: A process for the manufacture of a railroad rail of a steel alloy having a pearlitic microstructure. The rail is is shaped at a reduction rate of 1.8 to 8% and aligned straight in its longitudinal direction at a temperature between 770° C. and 1050° C., whereafter it is mounted with the head down and is allowed to cool slowly in still air to a temperature of 5 to 120° C. above the Ar3 temperature, and upon reaching this temperature at least the rail head is dipped into a cooling liquid and is cooled to the temperature of conversion of an austenitic grain microstructure into a fine pearlitic grain microstructure.

Abstract: Process and device for hardening a rail. The process for hardening a rail or part thereof by transforming it from an austenitic structure into a different microstructure that is stable at room temperature comprises aligning, horizontally positioning, and fixing in axial alignment to secure against bending, the rail in its austenitic state; and while keeping the rail fixed in axial alignment and secured against bending, force-cooling the rail or part thereof to allow the austenitic structure to be transformed into said different microstructure. The device for hardening a rail or part thereof by force-cooling comprises a support for supporting the rail; a cooling device for force-cooling the rail or part thereof; and at least two fixing devices for axially aligning and securing the rail against bending during the force-cooling.

Abstract: A railroad rail of a steel alloy having a pearlitic microstructure, which rail has a good long-term serviceability, high ductility and high abrasion resistance of the working surface at the rail head, the rail being formed of a steel alloy having a chemical composition in weight % of 0.4 to 1.0 carbon, 0.1 to 1.2 silicon, 0.5 to 3.5 manganese, up to 1.5 chromium, optionally other alloy elements below 1 weight %, the rest being iron and impurities, and at least the rail head having a portion of fine pearlitic microstructure and a hardness between 340 HB and 425 HB down to a sufficient depth from the top surface, the arrangement and the extension of the portion of fine pearlitic microstructure in the rail cross section being even along the entire length of the rail.

Abstract: A method for the thermal treatment of rails, in particular of the rail head, in which cooling is carried out in a cooling agent that contains a synthetic cooling agent additive, starting at temperatures above 720° C. The treatment is carried out by immersion in the cooling agent until withdrawl of the immersed areas, courses, at a surface temperature between 450 and 550° C. results without temperature equalization across the whole of the cross-section, section, there by avoiding hardening of the rail web whilst maintaining an optimal cooling rate for the rail head.

Abstract: A railroad rail of a steel alloy having a pearlitic microstructure, which rail has a good long-term serviceability, high ductility and high abrasion resistance of the working surface at the rail head, the rail being formed of a steel alloy having a chemical composition in weight % of 0.4 to 1.0 carbon, 0.1 to 1.2 silicon, 0.5 to 3.5 manganese, up to 1.5 chromium, optionally other alloy elements below 1 weight %, the rest being iron and impurities, and at least the rail head having a portion of fine pearlitic microstructure and a hardness between 340 HB and 425 HB down to a sufficient depth from the top surface, the arrangement and the extension of the portion of fine pearlitic microstructure in the rail cross section being even along the entire length of the rail.

Abstract: A method for the thermal treatment of rails, in particular of the rail head, in which cooling is carried out in a cooling agent that contains a synthetic cooling agent additive starting at temperatures above 720° C. The treatment is carried out by immersion in the cooling agent until withdrawal of the immersed areas occurs, at a surface temperature between 450 and 550° C. results without temperature equalization across the whole of the cross-section, thereby avoiding hardening of the rail web while maintaining an optimal cooling rate for the rail head.

Abstract: Method for heat-treating profiled rolling stock, including track and railroad rails, having a profiled surface and increased heat removal from portions of the profiled surface during cooling in the gamma range of an iron based alloy material. The method includes aligning the profiled rolling stock, at an average temperature of between 750° C. and 1100° C., straight in its longitudinal direction by plastic shaping, and moving the aligned profiled rolling stock, in its aligned state, in a transverse direction and holding same there. The method also includes evenly cooling of the aligned profiled rolling stock, in a first cooling, to a temperature below 860° C.

Abstract: A profiled rolling stock, in particular a running rail or railroad track made of an iron-based alloy, is provided. The alloy contains silicon plus aluminum below 0.99 wt. % of the rolling stock. A structure in the cross section is formed, at least partially, by isothermic structural transformation due to accelerated cooling from the austenite region of the alloy to a lower intermediary phase temperature and holding. Transformation preferably occurs between the martensite transformation point of the alloy a temperature 250.degree. C. over the martensite transformation point Ms.