Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR MANUFACTURING A RAIL AND CORRESPONDING RAIL
A method for manufacturing a rail includes casting a steel to obtain a semi-product. The steel has a composition comprising 0.20%≤C≤0.60%, 1.0%≤Si≤2.0%, 0.60%≤Mn≤1.60% and 0.5≤Cr≤2.2%, optionally 0.01%≤Mo≤0.3%, 0.01%≤V≤0.30%; the remainder being Fe and impurities. The method also includes hot rolling the semi-product into a hot rolled semi-product having the shape of the rail and comprising a head, with a final rolling temperature TFRT higher than Ar3; and cooling the head to a cooling stop temperature TCS between 200° C. and 520° C. The temperature of the head over time is comprised between a upper boundary having the coordinates defined by A1 (0 second, 780° C.), B1 (50 seconds, 600° C.), and C1 (110 seconds, 520° C.) and a lower boundary having the coordinates defined by A2 (0 second, 675° C.), B2 (50 seconds, 510° C.), and C2 (110 seconds, 300° C.). The method also includes maintaining the head in a temperature range comprised between 300° C. and 520° C. during a holding time thold of at least 12 minutes, and; cooling down the hot rolled semi-product to room temperature to obtain the rail.
METHOD FOR MANUFACTURING A RAIL AND CORRESPONDING RAIL
A method for manufacturing a rail includes casting a steel to obtain a semi-product. The steel has a composition comprising 0.20%≤C≤0.60%, 1.0%≤Si≤2.0%, 0.60%≤Mn≤1.60% and 0.5≤Cr≤2.2%, optionally 0.01%≤Mo≤0.3%, 0.01%≤V≤0.30%; the remainder being Fe and impurities. The method also includes hot rolling the semi-product into a hot rolled semi-product having the shape of the rail and comprising a head, with a final rolling temperature TFRT higher than Ar3; and cooling the head to a cooling stop temperature TCS between 200° C. and 520° C. The temperature of the head over time is comprised between a upper boundary having the coordinates defined by A1 (0 second, 780° C.), B1 (50 seconds, 600° C.), and C1 (110 seconds, 520° C.) and a lower boundary having the coordinates defined by A2 (0 second, 675° C.), B2 (50 seconds, 510° C.), and C2 (110 seconds, 300° C.). The method also includes maintaining the head in a temperature range comprised between 300° C. and 520° C. during a holding time thold of at least 12 minutes, and; cooling down the hot rolled semi-product to room temperature to obtain the rail.
METHOD FOR MANUFACTURING A RAIL AND CORRESPONDING RAIL
VERFAHREN ZUR HERSTELLUNG EINER SCHIENE UND ENTSPRECHENDE SCHIENE
PROCÉDÉ DE FABRICATION DE RAIL ET RAIL CORRESPONDANT
ARANCON ALVAREZ JOSÉ (Autor:in) / ALVAREZ DIEZ DAVID (Autor:in) / ARTIMEZ ENCINA JOSÉ MANUEL (Autor:in) / GARCIA CABALLERO FRANCISCA (Autor:in) / POHU BENJAMIN (Autor:in)
29.12.2021
Patent
Elektronische Ressource
Englisch
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