Electron Beam Tack Welding
Electron beam tack welding is a quick fixing method that holds fittings in place with short, high-intensity electron beams. It is used before the main welding to secure positions.
Physical-chemical mechanism of action
Electron beam tacking uses a short, high-intensity electron beam that plastically deforms the material at the fit-up point. This increases the bonding capability between metal particles and prevents the fit-ups from opening again.
Metallurgical relevance & risks during welding
The process is especially helpful for complex components because it is faster and more precise than conventional fixing methods. However, too high an energy input can alter or damage the material, which can lead to cracks or the formation of impurities.
Workshop practice & instructions
Use electron beam tacking with an energy input of 10–20 J/cm². The heating time is typically 50–100 ms. Make sure the fit-up is precisely aligned before doing the tack.