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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
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