The technique of joining the work piece of metal, railway tracks, rail, chains, pipe, are placed end- to -end with the help of electric heating and an electric arc is made which melts and welds the ends of the materials . Flash butt welding technique is also used in fabrication shops and also in construction industries to weld the boilers.
The welding process is sub categorized into pre heat, flash, and upsetting the materials. Pre heating of material is carried on under low welding pressure and when the heating of joints gets over flashing process starts where the joint surface metals are burnt off for making them into the equal surface. Once the flash welding process gets over upsetting of welding process starts where the irregular surfaces are finned removing the molted and oxidized materials. The result of welding is extremely strong and smooth joints.
Advantages of using flash butt welding
- It provides high welding quality because of solid fusion.
- The defect level is low because there is lack of molten in welding process.
- Since the technique of welding is automated manual skills are not required.
- There no usage of consumables or shielding gas. Thus the chance of material getting contaminated is reduced.
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