Electron Beam Melting (EBM) technology, was developed by Arcam AB in Sweden, is a type of additive manufacturing for metal parts. It is often classified as a rapid manufacturing method. The technology manufactures parts by melting metal powder layer by layer with an electron beam in a high vacuum. Unlike some metal sintering techniques, the parts are fully dense, void-free, and extremely strong.
This solid freeform fabrication method produces fully dense metal parts directly from metal powder with characteristics of the target material. The EBM machine reads data from a 3D CAD model and lays down successive layers of powdered material. These layers are melted together utilizing a computer controlled electron beam. In this way it builds up the parts. The process takes place under vacuum, which makes it suited to manufacture parts in reactive materials with a high affinity for oxygen, e.g. titanium.
The melted material is from a pure alloy in powder form of the final material to be fabricated (no filler). For that reason the electron beam technology doesn’t require additional thermal treatment to obtain the full mechanical properties of the parts. That aspect allows classification of EBM with selective laser melting (SLM) where competing technologies like SLS and DMLS require thermal treatment after fabrication. Compared to SLM and DMLS, EBM has a generally superior build rate because of its higher energy density and scanning method.
Electron beam melting (EBM) Video
|Material type:||Solid (Freeform fabrication)|
|Max part size:||200x200x350 mm|
|Min feature size:||0.005 in.|
|Min layer thickness:||0.0050 in.|
|Surface finish:||Strength, elasticity, fatigue, microstructure|
|Applications:||Stainless steel, Titanium, Aluminium, Hard metals, Copper, Niobium|