A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a welding and heat treatment method for a deep hardened layer 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 300-385 V, the average current of the electric heating stage is 500-800 A, and the duration time of the electric heating stage is 80-100 s; heat treatment is conducted on the steel rail subjected to flash welding, specifically, a first cooling stage, a heating stage, a second cooling stage and a third 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 initial temperature of the second cooling stage is larger than 900 DEG C, and the final temperature ranges from 600 DEG C to 700 DEG C; and the initial temperature of the third cooling stage is 600-700 DEG C, and the final temperature of the third cooling stage is 430-500 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.
本发明公开了一种深硬化层钢轨的焊接和热处理方法及钢轨，该方法包括：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300～385V，平均电流为500～800A，持续时间80～100s；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、第二冷却阶段、第三冷却阶段，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℃，所述第二冷却阶段的起始温度大于900℃并且终止温度为600～700℃，所述第三冷却阶段的起始温度为600～700℃并且终止温度为430～500℃。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。
The invention discloses a welding and heat treatment method for a deep hardened layer 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 300-385 V, the average current of the electric heating stage is 500-800 A, and the duration time of the electric heating stage is 80-100 s; heat treatment is conducted on the steel rail subjected to flash welding, specifically, a first cooling stage, a heating stage, a second cooling stage and a third 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 initial temperature of the second cooling stage is larger than 900 DEG C, and the final temperature ranges from 600 DEG C to 700 DEG C; and the initial temperature of the third cooling stage is 600-700 DEG C, and the final temperature of the third cooling stage is 430-500 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.
本发明公开了一种深硬化层钢轨的焊接和热处理方法及钢轨，该方法包括：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300～385V，平均电流为500～800A，持续时间80～100s；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、第二冷却阶段、第三冷却阶段，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℃，所述第二冷却阶段的起始温度大于900℃并且终止温度为600～700℃，所述第三冷却阶段的起始温度为600～700℃并且终止温度为430～500℃。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。
Welding and heat treatment method for deep hardened layer steel rail and steel rail
深硬化层钢轨的焊接和热处理方法及钢轨
2023-12-05
Patent
Electronic Resource
Chinese
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