Abstract：Inconel718 alloy was studied, and the metal spherical powder was prepared by plasma rotary electrode
method (PREP) and gas atomization (VIGA), and the effects of different powder methods on microstructure and
component distribution before and after heat treatment were studied. The cooling speed corresponding to the two
powder floating methods was simulated by the flow heat exchange principle. The analysis results show that the Inconel718
alloy powder prepared by PERP method has a certain advantage in oxygen increment, sphericalness, and
fluidity, and powder prepared by VIGA method facilitates improving the microharmal hardness of the powder, fine
powder particle size. When the powder is subjected to the same heat treatment process, the microstructure change
is the same, and Nb and Mo are analyzed. The results of the simulation calculations show that the fine-race-free
powder is significantly higher than the powder corresponding to the PREP method, which is consistent with the performance
data results corresponding to the experiment.
2023, Vol. 33 
