High-power flash butt welder is to press the two ports of the butt welding parts with both ends of the electrode respectively. After electrization, the forging cylinder will push the two broken ports gradually according to the set speed. In the process of approaching the port, the current density of the first contact part is very high, and the metal lintel will be liquefied instantly and the metal splash will appear after blasting, which is flash. With the gradually close to the port, the point of contact gradually increased, and finally the whole end face are formed numerous liquid metal lintel, and constantly blasting, so that the end face heating to the critical point of plastic and liquid instant on the two end face with large forging force and pressure for a period of time, the two end face fusion together, forming a stable joint;
