Abstract New nickel-based superalloy powder for selective laser melting with a total mass fraction of Al and Ti less than 4% was prepared by argon atomization. The composition, phase, morphology, microstructure and properties of the new nickel-based superalloy powder were characterized. The results show that the total mass fraction of Al and Ti in the new nickel-based superalloy powder was 3.82%. Small particle size powder (particle size<20 μm) has a compact interior structure, mainly cellular structure, and uniformly composition, and its micro-hardness (HV) reaches 265. As the particle size of the powder increases, the number of dendrites in the powder increases, and solidification shrinkage pore and particle-coating defect appear in some large-diameter (particle size>40 μm) powder. After sieving, the powder with a particle size of 15-44 μm has a concentrated particle size distribution, a median diameter DV50 of 19.7 μm, the flow- ability and apparent density are 15.14 s/50 g and 4.15 g/cm3, respectively.
NONG Bizhong,ZHANG Yazhou,LIU Zuming, et al. Microstructure and properties of new nickel-based superalloy powder prepared by argon atomization[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(6): 547-553.
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