Refractory metal spherical powders: niobium / molybdenum / tantalum / tungsten / hafnium / titanium / zirconium / rhenium By means of plasma melting - plasma spheroidization - powder particles of agglomerated / sintered hard metallic starting powders are remelted into spherical, dense powder particles. The powder is spheroidized in remelting plants under a protective gas atmosphere. The change in shape of the powder particles causes inter alia improved flowability of the fine powders. Grain size: <15μm / 15 - 45μm / 45 - 105μm