Electron Beam Welding vs Laser Welding – Advantages and Disadvantages by EB Industries

Electron Beam Welding vs Laser Welding – Advantages and Disadvantages by EB Industries

hi I’m gonna point out some of the
advantages and disadvantages of electron beam welding vs laser welding today you
can make better decisions regarding which processes is right for your application. Both
electron beam and laser welding methods utilizes a concentrated beam of energy
that can be precisely controlled both energy and location thus the
technologies are ideal for precision welding EB welding uses an an accelerated
beam of electrons that can be magnetically deflected and focused on the work piece. Laser
welding uses amplified light that is delivered and deflected by glass lenses
mirrors and often a fiber optic cable. The biggest advantage of EB welding is it
can deliver deeper penetration welds than any other process. An EB weld can
be up to two inches deep in steel with the with the less than .2 inches. The narrow width, also called the heat affected zone means minimal heat going into the part as
well as minimal distortion. EB can also apply very light welds only a few
thousands of an inch deep. However to generate electrons eb welding then
must take place in a vacuum and that means waiting to pump down a vacuum
chamber. You are also restricted with part size. if it doesn’t fit in a vacuum
chamber it can’t be eb welded. But a huge advantage of welding under vacuum
is there is no oxidation, contamination or cover gas problems unlike conventional welding methods. In fact many
impurities found in the base material are vaporized during the process
resulting in the strongest purist weld you can get. Finally electron beam equipment is
expensive welding machine start around two million dollars and cost the cost for upkeep and support is high. Besides having personnel trained in EB welding you also need
expertise in high vacuum, high voltage technologies. Laser welding can be a great alternative. Equipment is less expensive and parts
can be welded in open-air so no vacuum chamber although a cover gas is often required. No
vacuum loss means part size isn’t an issue and the laser can be delivered via fiber-optic cable
which lends itself to robotic control. laser achieve decent weld penetration up
to about a quarter of an inch and steel and also have a small heat affected zone. but a laser simply can’t achieve the
same penetration as an electron beam. One of the reasons for this is the molten material in
the weld pool can act like a mirror and reflect laser energy away from the piece.
To compensate for this and keep the part cool the laser can be pulsed on and off, which
lets a high peak of energy penetrate the reflective surface but keeps
the average power put into the part low. both electron beams and lasers are excellent for welding
dissimilar metals but which is best depends on the material and the weld
needed. If you want to know more please call us or check out our website. We’ve
been in business for over 50 years we’re happy to answer any questions or help
you with your design. Thank you for watching

7 thoughts on “Electron Beam Welding vs Laser Welding – Advantages and Disadvantages by EB Industries

  1. any future research methods to improve the efficiency of laser beam welding like preheating the workpiece.

  2. Wow – brings back memories 1966 at Sundstrand aviation – English Electric – Liverpool
    Beam welding on a Hawker Sidley DYNAWELD –
    By error, noticed if the components where dipped in liquid nitrogen! The beam parameters could be dropped 90% achieving no distortion – zero colouring – full penetration – 90% less power – ceramic / tungsten filament lasted far longer – This was simply called “Super Conductivity”-

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