WORKING PRINCIPLE OF ELECTRON BEAM WELDING PROCESS

1. ELECTRON BEAM
WELDING
BY,
ARAVINDKUMAR B

2. ELECTRON BEAM WELDING
a. Utilizes the energy from the fast moving beam of
electrons focused on work piece
b. Electrons strike the metal surface and the kinetic
energy is converted to heat
c. Beam is created in high vacuum (10-3 to 10-5 mm
hg)
d. Contamination is prevented and pure welds can be
made
e. High vacuum is necessary around the filament
f. In order to prevent it from burning
g. In order to produce and focus a stable beam.

3. ELECTRON BEAM WELDING
 h. Tungsten filament which serves as a cathode
emits a max of electrons that are accelerated
 and focused to a 0.25 –1mm Dia beam of high
energy density up to 0.5 to 10 Kw /mm2
 i. Heat generated is about 2500 C sufficient to melt
the work piece and fills a narrow weld gap.
 j. Automobile, aerospace components, farm
equipments, ball bearing over 100mm are being
welded by EBW process.

5. ADVANTAGES OF EBW:
• Welds are clean with no porosity & no shielding gas
is used.
• As energy input is in a narrow concentrated beam
distortion is eliminated
• Speed is as fast as 2500mm/min
• Weld any metal to thick of 150 mm.