Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for improving low-temperature fracture toughness of steel rail and obtained steel rail and application thereof
The invention relates to the field of steel making, in particular to a method for improving low-temperature fracture toughness of a steel rail and the steel rail obtained according to the method and application thereof. The method for improving low-temperature fracture toughness of the steel rail comprises the following steps: the acceleration cooling treatment is performed for the tread center of a rail head of the rolled steel rail, the two sides of the rail head and the center part of a rail bottom; the cooling beginning temperature of the acceleration cooling is 650-900 DEG C; the cooling speed is 1-5 DEG C/s; and the final cooling temperature is 400-550 DEG C. When the steel rail guarantees the strength, the fracture toughness under -20 DEG C can reach above 35 MPa/m 0.5, and the tensile strength can be more than 1300 MPa; and the steel rail is excellent in toughness matchability, is excellent in rolling touch fatigue performance and wear resistance in the use process, and is suitable for railways in alpine regions.
Method for improving low-temperature fracture toughness of steel rail and obtained steel rail and application thereof
The invention relates to the field of steel making, in particular to a method for improving low-temperature fracture toughness of a steel rail and the steel rail obtained according to the method and application thereof. The method for improving low-temperature fracture toughness of the steel rail comprises the following steps: the acceleration cooling treatment is performed for the tread center of a rail head of the rolled steel rail, the two sides of the rail head and the center part of a rail bottom; the cooling beginning temperature of the acceleration cooling is 650-900 DEG C; the cooling speed is 1-5 DEG C/s; and the final cooling temperature is 400-550 DEG C. When the steel rail guarantees the strength, the fracture toughness under -20 DEG C can reach above 35 MPa/m 0.5, and the tensile strength can be more than 1300 MPa; and the steel rail is excellent in toughness matchability, is excellent in rolling touch fatigue performance and wear resistance in the use process, and is suitable for railways in alpine regions.
Method for improving low-temperature fracture toughness of steel rail and obtained steel rail and application thereof
YUAN JUN (Autor:in) / ZOU MING (Autor:in) / GUO HUA (Autor:in) / LI DADONG (Autor:in) / DENG YONG (Autor:in) / HAN ZHENYU (Autor:in) / WANG YUAN (Autor:in) / CHEN CHONGMU (Autor:in)
13.01.2016
Patent
Elektronische Ressource
Englisch
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