Electron Beam-/Laser Processing

  • The electron beam welds metals with minimized energy input with or without filler material. It produces deep seams with a narrow heat affected zone for mechanically finished parts. Compared to a laser, it provides a very energy efficient beam source with fast beam deflection. The CNC-controlled, robust welding process produces low distortion welds. The particle beam couples independent of the wavelength into optically reflective surfaces and allows for a broad spectrum of welded metals e.g. Copper or Aluminum.
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The laser beam welding with brilliant solid-state lasers at atmospheric pressure produces a metal vapor plume above the vapor capillary. The vapor plume impacts the molten bath uncontrolled and causes spatter. In a vacuum, neither a vapor plume nor spatter arises. Therefore, the combination of vacuum and solid-state laser has the following advantages:

  • better energy coupling requires lower beam power
  • very good results in conditionally weldable materials
  • Standard beam sources of competing producers
  • one fast switchable laser source can supply several processing stations

  • In the case of surface treatment by electron beam, the electrons are not optically reflected from shiny surfaces, in contrast to the photons of a laser. The variable electromagnetic Focus offers significant advantages to a 3D surface. Furthermore state of the art electro magnetic EB deflection is two magnituedes faster than mechanical laser deflection. In particular, the following surface modifications in series are therefore interesting:
    • Electron Beam hardening
    • Electron Beam remelting
    • Electron Beam surface structuring
    • Electron Beam engraving
    • Electron Beam polishing
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    • Pressing of plane surfaces under high vacuum at 60% to 90% of the lowest melting temperature of the material composite
    • Fast heating by electron beam
    • Atoms switch positions between the interface surfaces
    • Layer additive manufacturing of prepared sheets that form hollow structures such as cooling channels
    • Bonding of metallic materials (eg, tool steels) and non-metallic materials that are not weldable by fusion
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  • Electron beam is particularly suitable for CNC-controlled wire or ribbon applicaton.
  • Electon beam power is scalable at low cost per kW; This makes it ideal for high deposition rates with a wire.
  • Since the laser doesn’t electrostatically charge up the powder particles it is predestined for applying powder using a nozzle.