Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for improving wear resistance of rail head of steel rail welding head and steel rail
The invention discloses a method for improving the wear resistance of a rail head of a steel rail welding head and a 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 90%-100% of the total input voltage, the current is 40-80 kA, the number of short-circuit contact is 6-14, the duration of each time is 4-6 s, and the interval is 0.5-2 s; heat treatment is conducted on the steel rail subjected to flash welding, specifically, a first cooling stage, a heating stage, a heat preservation 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 temperature interval of the heat preservation stage ranges from 800 DEG C to 900 DEG C, and the temperature interval of the third cooling stage ranges from 800 DEG C to 900 DEG C; the initial temperature of the second cooling stage is higher than 900 DEG C, and the final temperature of the second cooling stage is 600-700 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 wear resistance of the steel rail welding head can be improved.
本发明公开了一种提高钢轨焊接头轨头耐磨性的方法及钢轨，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，通电加热阶段的电压为输入总电压的90％～100％，电流为40～80kA，短路接触的次数为6～14次，每次持续时间为4～6s，间隔0.5～2s；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、第三冷却阶段，其中，第一冷却阶段的终止温度为25～100℃，加热阶段的终止温度为800～1100℃，保温阶段的温度区间为800～900℃，第二冷却阶段的起始温度大于900℃并且终止温度为600～700℃，第三冷却阶段的起始温度为600～700℃并且终止温度为430～500℃。本发明能够提升钢轨焊接头耐磨性。
Method for improving wear resistance of rail head of steel rail welding head and steel rail
The invention discloses a method for improving the wear resistance of a rail head of a steel rail welding head and a 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 90%-100% of the total input voltage, the current is 40-80 kA, the number of short-circuit contact is 6-14, the duration of each time is 4-6 s, and the interval is 0.5-2 s; heat treatment is conducted on the steel rail subjected to flash welding, specifically, a first cooling stage, a heating stage, a heat preservation 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 temperature interval of the heat preservation stage ranges from 800 DEG C to 900 DEG C, and the temperature interval of the third cooling stage ranges from 800 DEG C to 900 DEG C; the initial temperature of the second cooling stage is higher than 900 DEG C, and the final temperature of the second cooling stage is 600-700 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 wear resistance of the steel rail welding head can be improved.
本发明公开了一种提高钢轨焊接头轨头耐磨性的方法及钢轨，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，通电加热阶段的电压为输入总电压的90％～100％，电流为40～80kA，短路接触的次数为6～14次，每次持续时间为4～6s，间隔0.5～2s；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、第三冷却阶段，其中，第一冷却阶段的终止温度为25～100℃，加热阶段的终止温度为800～1100℃，保温阶段的温度区间为800～900℃，第二冷却阶段的起始温度大于900℃并且终止温度为600～700℃，第三冷却阶段的起始温度为600～700℃并且终止温度为430～500℃。本发明能够提升钢轨焊接头耐磨性。
Method for improving wear resistance of rail head of steel rail welding head and steel rail
提高钢轨焊接头轨头耐磨性的方法及钢轨
LU XIN (Autor:in) / WANG RUOYU (Autor:in) / BAI WEI (Autor:in) / HUANG JIE (Autor:in)
01.12.2023
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2023
Method for prolonging service life of rail head of flash welding head of steel rail and steel rail
| Europäisches Patentamt | 2023