Metal powders produced for the various additive manufacturing processes are products derived from powder metallurgy technologies.
These materials are obtained by melting and atomizing metals of very high purity.
The atomization of liquid metal is carried out with a plasma torch or by spraying neutral gas under pressure through a nozzle; in both cases, the liquid metal at the atomization tower outlet solidifies in the form of spherical particles.
The size of the solid metal particles is generally between 15 and 45 microns.
The use of metal powders in additive manufacturing is done by means of a laser via the melting of successive thin layers, or by pulverized deposit.
The criteria of flowability, density, lack of porosity and homogeneity of the material are essential for the high quality of the products.