GE ArcamEBM Spectra H Operation Manual page 5

1 1 A A r r c c a a m m E E l l e e c c t t r r o o n n B B e e a a m m M M e e l l t t i i n n g g ( ( E E B B M M ) )
In the Arcam EBM ® process fully dense metal components are built up, layer-by-
layer of metal powder, melted by a powerful electron beam. Each layer is melted to
the exact geometry defined by a CAD model.
The electron beam is managed by electromagnetic coils providing beam control
that allows several melt pools to be maintained simultaneously.
The vacuum system provides a base pressure throughout the entire build cycle.
During the actual melt process, a partial pressure of helium is introduced to keep a
stable build environment.
For each layer in the build the electron beam heats the entire powder bed to an op-
timal ambient temperature, specific for the material used.
02 OM-710430 en-GB 1