Mobile flash butt welding method for 136RE+SS heat-treated rail

A mobile flash butt welding method for a 136RE+SS heat-treated rail, said method comprising conducting on the 136RE+SS heat-treated rail a pre-flash stage, a flash stage, a boost stage, an upset stage and a forge stage, with a total heat input of 7.1 MJ-10.0 MJ, a total duration of 110 s-135 s and an upsetting distance of 12.8 mm-16.7 mm during the welding method;

• wherein, in the pre-flash stage, a pre-flash stage heat input is 1.9 MJ-2.2 MJ, a pre-flash stage distance is 0.1 mm-1.2 mm and a pre-flash stage duration is 22.5 s-25 s;
• in the flash stage, a flash stage heat input is 5.0 MJ-6.0 MJ, a flash stage distance is 1.0 mm-5.0 mm and a flash stage duration is 48.0 s-52.0 s;
• in the boost stage, a boost stage heat input is 0.3 MJ-1.2 MJ, a boost stage distance is 13.1 mm-15.2 mm and a boost stage duration is 29.5 s-32.0 s;
• in the upset stage, an upset stage heat input is 0.1 MJ-0.3 MJ, an upset stage distance is 13.7 mm-16.0 mm and an upset stage duration is 2.0 s-9.9 s;
• and in the forge stage, a forge stage duration is 12.8 s-14.5 s.