Electron beam welding (EBW) is a fusion welding process in which a beam of
high-velocity electrons is applied to the materials being joined. The
work-pieces melt as the kinetic energy of the electrons is transformed into heat
upon impact. Raising electrons to a high energy by accelerating them to roughly
30 to 70 percent of the speed of light provides the energy to heat the weld.
The beam penetrates deeply, making it possible to weld much thicker workpieces
than is possible with other welding processes.
The electron beam is always generated in a high vacuum. Also the welding is
most often done in vacuum to prevent dispersion of the electron beam. The high
vacuum enables welding of higly reactive materials, like titanium or
zirconium.
With high enough energy in the beam, welds up to 10 cm deep in stainless steel,
or 30 cm in aluminium can be made, at width to depth ratio up to 30 : 1.
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Updated 6 years 4 days ago
The following paper displays a summary of illustrative presentation of
electron beam welding. This presentation is a part of Days of
Science, taking place regularly in ISI Brno, usually at the beginning
of November. The visitors may see…
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Updated 9 years 27 weeks ago
When some devices (e.g. vacuum or cryogenics) are manufactured, the need to
weld thin-walled parts is often met. Application of electron beam for this
purpose may bring, compared with micro-plasma or laser) some valuable advantages
balancing its higher…
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Updated 8 years 15 weeks ago
The possibility to join metal parts by fusion welding depends first of all on
their metallurgical properties. This problematic is extremely wide, therefore,
in this paper, we shall restrict our interest to only some specific questions,
more important for…
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Updated 7 years 14 weeks ago
The Institute of Scientific Instruments
(ISI) of the Czechoslovac Academy of Sciences
(CSAV) was founded in 1957 as successor of so-called „Scientific
Workshop“. In 1960 the founders,…
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Updated 9 years 24 weeks ago
In the past, as well as today, people looked for ways how to make use of that
what the nature offered. The knowledge how to gain, process and use metals, up
today belongs to the most important skills. Names of the first known metals,
bronze and iron, had…
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Updated 9 years 24 weeks ago
The depth of penetration of electron beam into material (in solid state)
depends on more factors. The most important of them are the total power
of the beam and the power density in the cross-section of the beam (the
focusation). It also…
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Updated 9 years 24 weeks ago
The kinetic energy of fast moving electrons can be utilised as a source of
heat for welding. The free electrons in vacuum can be accelerated by electric
field and formed by magnetic lens into a narrow ray carrying high energy, which
is transformed into…
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Updated 9 years 25 weeks ago
In the year 2005 the representatives of a German firm expressed their
interest to include one of our electron beam welders into their production
program. It was agreed that building of the prototype will be started at the
beginning of the next year, but…
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