Cobalt Chrome Alloy ASTM F 75 CoCr Alloy Arcam EBM material information. ISSUED NOVEMBER 2007.

ASTM F 75 CoCr Alloy General characteristics Cobalt-based alloys have been used in demanding applications for as long as investment casting has been available as an industrial process. Arcam’s Electron Beam Melting technology competes directly with investment casting and is a viable choice for manufacturing complex parts in cobalt-based alloys. Special characteristics The Arcam ASTM F75 CoCr alloy is also suitable for Rapid Manufacturing of production tools for injection moulding of plastic parts. The high hardness of the material and the excellent material qualities allow polishing components...

Manufacturing CoCr parts with EBM results in fully dense parts without weld lines in the material before or after heat treatment (HIP+HOM). The as-built material consists of elongated grains containing carbide precipitation. Heat treatment transforms the microstructure into an isotropic structure with a substantial reduction of visible carbides. The images below show the typical microstructure before and after heat treatment (HIP+HOM). The as-built material has elongated grains in the build direction (Z). It contains a high density of carbides that result the high hardness of the as-built material....