1. High productivity, no noise and harmful fumes, in mass production, can be arranged with other manufacturing processes on the assembly line. However, flash butt welding requires isolation due to sparks flying.
2. Simple operation, easy to mechanize and automate, and improved working conditions.
3. No need for filler metals such as welding wire, welding rod, and welding materials such as oxygen, acetylene, argon, etc., low welding costs.
4. The heating time is short and the heat is concentrated, so the heat-affected area is small, the deformation and stress are small, and there is usually no need to arrange calibration and heat treatment process after welding.
5. The molten nucleus is always surrounded by a plastic ring when it is formed, the molten metal is isolated from the air, and the metallurgical process is simple.