Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
POST-WELD HEAT TREATMENT METHOD FOR 1,300MPa-LEVEL LOW-ALLOY HEAT TREATED STEEL RAIL
Abstract The present disclosure relates to the technical field of manufacturing railway steel rail, and discloses a post-weld heat treatment method for 1,300 MPa-level low-alloy heat treated steel rail. The method comprises the following steps: (1) subjecting a steel rail welded joint formed by welding and having a residual temperature of 900-1,100°C to a first stage cooling so as to lower the welded joint surface temperature to 650-720°C; (2) subjecting the steel rail welded joint to a second stage cooling so as to lower the welded joint surface temperature to 480-550°C; (3) further subjecting the steel rail welded joint to a third stage cooling so as to lower the welded joint surface temperature to 10-30°C. The present disclosure performs heat treatment by taking advantage of the welding waste heat, it does not require a reheating during the heat treatment process, thereby simplifying the heat treatment process and reducing costs; in addition, the percentage content of martensitic structure possibly appearing in the metallographic structure of the steel rail welded joint can be controlled within the range of5 1%, and the fatigue life of the steel rail joint can reach 3 million times, which is conducive to ensuring operation safety of the railway. coooQ--oooo0
POST-WELD HEAT TREATMENT METHOD FOR 1,300MPa-LEVEL LOW-ALLOY HEAT TREATED STEEL RAIL
Abstract The present disclosure relates to the technical field of manufacturing railway steel rail, and discloses a post-weld heat treatment method for 1,300 MPa-level low-alloy heat treated steel rail. The method comprises the following steps: (1) subjecting a steel rail welded joint formed by welding and having a residual temperature of 900-1,100°C to a first stage cooling so as to lower the welded joint surface temperature to 650-720°C; (2) subjecting the steel rail welded joint to a second stage cooling so as to lower the welded joint surface temperature to 480-550°C; (3) further subjecting the steel rail welded joint to a third stage cooling so as to lower the welded joint surface temperature to 10-30°C. The present disclosure performs heat treatment by taking advantage of the welding waste heat, it does not require a reheating during the heat treatment process, thereby simplifying the heat treatment process and reducing costs; in addition, the percentage content of martensitic structure possibly appearing in the metallographic structure of the steel rail welded joint can be controlled within the range of5 1%, and the fatigue life of the steel rail joint can reach 3 million times, which is conducive to ensuring operation safety of the railway. coooQ--oooo0
POST-WELD HEAT TREATMENT METHOD FOR 1,300MPa-LEVEL LOW-ALLOY HEAT TREATED STEEL RAIL
BAI WEI (Autor:in) / LI DADONG (Autor:in) / WANG RUOYU (Autor:in) / DENG JIAN (Autor:in)
02.02.2023
Patent
Elektronische Ressource
Englisch
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Post weld heat treatment for high strength steel welded connections
| British Library Online Contents | 2016
Post weld heat treatment for high strength steel welded connections
| British Library Online Contents | 2016