Electron Beam Welding

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.

  • What is Electron Beam Welding?

    Tavné svařování
    Updated 7 years 40 weeks 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…

  • Electron beam welding of thin-walled parts

    Crosssection of an membrane bellows welded by the electron beam
    Updated 11 years 15 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…

  • Weldability of various materials

    Weld of aluminium parts
    Updated 10 years 2 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…

  • Electron beam welding machines in ISI: past&present

    E-beam welder ES-2 manufactured and installed in ISI, Brno
    Updated 9 years 2 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,…

  • Electron beam in technologies

    Heat exchanger welded by electron beam
    Updated 11 years 12 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…

  • Depth of weld

    Metalograpics cross-section of welding sample
    Updated 11 years 12 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…

  • Basic features of electron beam welding

    Profily typických svarů elektronovým svazkem
    Updated 11 years 12 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…

  • Electron beam welder MEBW-60/2

    E-beam welder MEBW-60/2
    Updated 11 years 13 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…