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A platform for research: civil engineering, architecture and urbanism
Method for prolonging service life of rail head of flash welding head of steel rail and steel rail
The invention discloses a method for prolonging the service life of a rail head of a flash welding head of a steel rail and the steel rail, and the method comprises the following steps: carrying out flash welding on the steel rail: sequentially carrying out an electrifying heating stage and a pressurizing upsetting stage; wherein the voltage of the electric heating stage is 340-410V, the average current of the electric heating stage is 50-300A, and the duration of the electric heating stage is 150-300s; heat treatment is conducted on the steel rail subjected to flash welding, specifically, a first cooling stage, a heating stage, a heat preservation stage and a second cooling stage are sequentially conducted, the final temperature of the first cooling stage ranges from 25 DEG C to 100 DEG C, the final temperature of the heating stage ranges from 800 DEG C to 1100 DEG C, the temperature interval maintained in the heat preservation stage ranges from 800 DEG C to 950 DEG C, and the temperature interval maintained in the second cooling stage ranges from 800 DEG C to 950 DEG C; the initial temperature of the second cooling stage is larger than or equal to 800 DEG C, and the final temperature of the second cooling stage is 420-480 DEG C. The rail head internal hardness of the steel rail flash welding head can be improved, so that the wear resistance and the service life of the steel rail welding head are improved.
本发明公开了一种延长钢轨闪光焊接头轨头使用寿命的方法及钢轨，方法包括：对钢轨进行闪光焊接，包括：依次进行通电加热阶段、加压顶锻阶段；其中，所述通电加热阶段的电压为340～410V，平均电流为50～300A，持续时间为150～300s；对经过闪光焊接的钢轨进行热处理，包括：依次进行第一冷却阶段、加热阶段、保温阶段、第二冷却阶段，其中，所述第一冷却阶段的终止温度为25～100℃，所述加热阶段的终止温度为800～1100℃，所述保温阶段维持的温度区间为800～950℃，所述第二冷却阶段的起始温度大于等于800℃并且终止温度为420～480℃。本发明能够提高钢轨闪光焊接头的轨头内部硬度，从而提升钢轨焊接头耐磨性和使用寿命。
Method for prolonging service life of rail head of flash welding head of steel rail and steel rail
The invention discloses a method for prolonging the service life of a rail head of a flash welding head of a steel rail and the steel rail, and the method comprises the following steps: carrying out flash welding on the steel rail: sequentially carrying out an electrifying heating stage and a pressurizing upsetting stage; wherein the voltage of the electric heating stage is 340-410V, the average current of the electric heating stage is 50-300A, and the duration of the electric heating stage is 150-300s; heat treatment is conducted on the steel rail subjected to flash welding, specifically, a first cooling stage, a heating stage, a heat preservation stage and a second cooling stage are sequentially conducted, the final temperature of the first cooling stage ranges from 25 DEG C to 100 DEG C, the final temperature of the heating stage ranges from 800 DEG C to 1100 DEG C, the temperature interval maintained in the heat preservation stage ranges from 800 DEG C to 950 DEG C, and the temperature interval maintained in the second cooling stage ranges from 800 DEG C to 950 DEG C; the initial temperature of the second cooling stage is larger than or equal to 800 DEG C, and the final temperature of the second cooling stage is 420-480 DEG C. The rail head internal hardness of the steel rail flash welding head can be improved, so that the wear resistance and the service life of the steel rail welding head are improved.
本发明公开了一种延长钢轨闪光焊接头轨头使用寿命的方法及钢轨，方法包括：对钢轨进行闪光焊接，包括：依次进行通电加热阶段、加压顶锻阶段；其中，所述通电加热阶段的电压为340～410V，平均电流为50～300A，持续时间为150～300s；对经过闪光焊接的钢轨进行热处理，包括：依次进行第一冷却阶段、加热阶段、保温阶段、第二冷却阶段，其中，所述第一冷却阶段的终止温度为25～100℃，所述加热阶段的终止温度为800～1100℃，所述保温阶段维持的温度区间为800～950℃，所述第二冷却阶段的起始温度大于等于800℃并且终止温度为420～480℃。本发明能够提高钢轨闪光焊接头的轨头内部硬度，从而提升钢轨焊接头耐磨性和使用寿命。
Method for prolonging service life of rail head of flash welding head of steel rail and steel rail
延长钢轨闪光焊接头轨头使用寿命的方法及钢轨
LU XIN (author) / WANG RUOYU (author) / DENG JIAN (author) / HUANG JIE (author)
2023-12-01
Patent
Electronic Resource
Chinese
| European Patent Office | 2023
| European Patent Office | 2023
Method for improving wear resistance of rail head of steel rail welding head and steel rail
| European Patent Office | 2023