Rare earth aluminum alloy powder applicable for additive manufacturing and preparation method thereof

A method for preparing a rare earth aluminum alloy powder applicable for additive manufacturing, comprising the following steps:

• S1, heating and melting aluminum ingots into an aluminum melt at a temperature of 730° C. to 780° C. in presence of a protective atmosphere;
• S2, adding required alloy elements to the aluminum melt to obtain an alloy melt:
• adjusting a proportion of each element with an intermediate alloy, and performing degassing and deslagging so that the alloy elements are present in the following preset percentages by weight:
• 6.00% to 8.00% of Ce, 0.40% to 1.00% of Mg, 0.10% to 0.25% of Y, 0.10% to 0.25% of Zr, less than 0.1% of impurities, and the balance being aluminum;
• S3, leading out the alloy melt through a fluid guiding pipe, and impacting the alloy melt with a gas flow at an outlet of the fluid guiding pipe, so that the alloy melt is atomized into fine droplets under an action of surface tension, and solidified into spherical alloy powder;
• and
• S4, collecting the spherical alloy powder in a vacuum collector, and screening and drying the spherical alloy powder to obtain the rare earth aluminum alloy powder applicable for additive manufacturing.