Abstract
Flexible control of atomization pressure and bar material feeding speed was achieved during preparation of TC11 alloy 3D-printing spherical powder on basis of a vacuum-induced multistage atomization process. Collision at the metal drop atomization stage was effectively avoided and spherical powder quality was significantly enhanced while ensuring the high fine-powder yield. Under the optimized atomization process conditions, the powder with D90 of 59.2 μm, highest sphericity, O and N element increment below 0.04%, and 15–53 μm powder yield of 30% was obtained. These comprehensive mechanical properties meet the requirement for 3D printing.
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