High-toughness heat-resistant aluminum alloy armature material and preparation method thereof

A method for preparing a high-toughness heat-resistant aluminum alloy armature material comprising:

• S1, heating and melting an aluminum ingot into aluminum liquid under protection of an atmosphere at a temperature of 760° C.-780° C.;
• S2, adding the following elements in mass percentage to the aluminum liquid:
• Ce 6.00%-12.00%, Y 5.00%-9.50%, Zr 0.50%-3.00%, Mg 0.10%-2.50%, X 0.15%-2.50%, Fe 0.15%-0.25%, Mn 0.05%-0.15%, and Si 0.10%-0.50%, wherein a content of other impurities is less than 0.1%, and X is any one or a mixture of more selected from a group consisting of Yb, Er, La, and Sc;
• adjusting contents of the elements according to a pre-set composition, degassing and deslagging to form alloy liquid, and then casting the formed alloy liquid into an alloy ingot;
• S3, processing the obtained alloy ingot into spherical alloy powder;
• and
• S4, subjecting the spherical alloy powder to selective laser melting and solidification forming to produce nano-scale Al11Ce3, Al3(Y, Zr), and/or Al3X intermetallic compounds distributed in a net-like skeleton structure in an aluminum matrix, wherein the produced nano-scale Al11Ce3, Al3(Y, Zr), and/or Al3X intermetallic compounds are the high-toughness heat-resistant aluminum alloy armature material.