Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for improving internal hardness of rail head of flash welding head of steel rail and steel rail
The invention discloses a method for improving the internal hardness 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; the heat treatment comprises the following steps: accelerated cooling is carried out on the rail head top surface, the rail head side surface and the rail head lower jaw of a rail joint near a weld zone, the initial temperature of accelerated cooling is greater than 700 DEG C, the final temperature is 430-500 DEG C, and the average cooling speed is 5-35 DEG C/s. 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.
本发明公开了一种提升钢轨闪光焊接头轨头内部硬度的方法及钢轨，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：对钢轨接头近焊缝区轨头顶面、轨头侧面以及轨头下颚处进行加速冷却，所述加速冷却的起始温度大于700℃，终止温度为430℃～500℃，平均冷却速度为5～35℃/s。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 improving internal hardness of rail head of flash welding head of steel rail and steel rail
The invention discloses a method for improving the internal hardness 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; the heat treatment comprises the following steps: accelerated cooling is carried out on the rail head top surface, the rail head side surface and the rail head lower jaw of a rail joint near a weld zone, the initial temperature of accelerated cooling is greater than 700 DEG C, the final temperature is 430-500 DEG C, and the average cooling speed is 5-35 DEG C/s. 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.
本发明公开了一种提升钢轨闪光焊接头轨头内部硬度的方法及钢轨，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：对钢轨接头近焊缝区轨头顶面、轨头侧面以及轨头下颚处进行加速冷却，所述加速冷却的起始温度大于700℃，终止温度为430℃～500℃，平均冷却速度为5～35℃/s。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 improving internal hardness of rail head of flash welding head of steel rail and steel rail
提升钢轨闪光焊接头轨头内部硬度的方法及钢轨
LU XIN (Autor:in) / LI DADONG (Autor:in) / WANG RUOYU (Autor:in) / HUANG JIE (Autor:in)
05.12.2023
Patent
Elektronische Ressource
Chinesisch
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