Method of W-Ni-Fe Composite Spherical Powder Production and the Possibility of Its Application in Selective Laser Melting Technology

For the first time, a powder of W-5Ni-2Fe composition with spherical particles from 15 to 50 microns and tungsten grain size 0.5 3 was obtained using new technological approach, developed by authors, based on plasma spheroidization granules made nanoparticles synthesized in chemical process. The possibility spheroidized process selective laser melting (SLM) has been proved. microstructure, physical, mechanical characteristics experimental samples SLM technology produced have studied. results performed studies shown that microstructure is extremely dependent parameters precise choice mode it possible obtain homogeneous structure heavy alloy (WHA), about 1–2 microns, which much smaller than traditional alloys. This creates prerequisites for increasing strength parts complex shapes method such powders. maximum values density hardness conducted are not worse liquid-phase sintering technology. It determined main problem during investigation heterogeneity massive formation micropores microcracks.