Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Steel rail for heavy haul railway, production method thereof and application thereof
The invention discloses a steel rail for a heavy haul railway and a manufacturing method thereof. Rail distance corners of the steel rail for the heavy haul railway are formed by globular pearlite structures. The thickness of the rail distance corners ranges from 3 mm to 5 mm, the rigidity of the rail distance corners ranges from 350 HB to 390 HB, and the ductility of the rail distance corners ranges from 13% to 16%. The manufacturing method includes the steps that a finishing rolled steel rail is rapidly cooled, and then rapid heating and heat preservation are carried out at the rail distance corners, wherein the conditions of rapid cooling include the starting cooling temperature of 800 DEG C to 880 DEG C, the cooling speed of 4 DEG C/s to 10 DEG C/s, and the final cooling temperature of 380 DEG C to 440 DEG C; the conditions of rapid heating and heat preservation are that the temperature of the rail distance corners is raised to 710 DEG C to 810 DEG C at the temperature raising speed of 3.0 DEG C/s to 4.0 DEG C/s, and the temperature is preserved for 3 min to 5 min. The steel rail for the heavy haul railway has the high strength, the high abrasion resistance and the high contact fatigue resistance and particularly has the excellent abrasion resistance and the excellent contact fatigue resistance in the earlier use stage.
Steel rail for heavy haul railway, production method thereof and application thereof
The invention discloses a steel rail for a heavy haul railway and a manufacturing method thereof. Rail distance corners of the steel rail for the heavy haul railway are formed by globular pearlite structures. The thickness of the rail distance corners ranges from 3 mm to 5 mm, the rigidity of the rail distance corners ranges from 350 HB to 390 HB, and the ductility of the rail distance corners ranges from 13% to 16%. The manufacturing method includes the steps that a finishing rolled steel rail is rapidly cooled, and then rapid heating and heat preservation are carried out at the rail distance corners, wherein the conditions of rapid cooling include the starting cooling temperature of 800 DEG C to 880 DEG C, the cooling speed of 4 DEG C/s to 10 DEG C/s, and the final cooling temperature of 380 DEG C to 440 DEG C; the conditions of rapid heating and heat preservation are that the temperature of the rail distance corners is raised to 710 DEG C to 810 DEG C at the temperature raising speed of 3.0 DEG C/s to 4.0 DEG C/s, and the temperature is preserved for 3 min to 5 min. The steel rail for the heavy haul railway has the high strength, the high abrasion resistance and the high contact fatigue resistance and particularly has the excellent abrasion resistance and the excellent contact fatigue resistance in the earlier use stage.
Steel rail for heavy haul railway, production method thereof and application thereof
DENG YONG (Autor:in) / GUO HUA (Autor:in) / ZOU MING (Autor:in) / JIA JIHAI (Autor:in) / HAN ZHENYU (Autor:in) / YUAN JUN (Autor:in) / WANG CHUNJIAN (Autor:in)
11.11.2015
Patent
Elektronische Ressource
Englisch
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