The invention discloses a material and method for preparing an aluminum
alloy structural member by using a
laser 3D (Three-Dimensional) printing technology. Technologies such as a CAD (
Computer Aided Design) three-dimensional
entity model slicing technology, a digital
programming technology and a
laser quick forming technology and a
material synthesis technology are combined integrally; under the condition that no any special mold or tool is used, multi-layer cladding accumulation is performed through quick melting and solidification of a
laser beam on an aluminum
alloy substrate by taking the
powder of Al, Fe, Cu, Si, Ti, B, Mn, C and Ce according to the
mass percentage of 80.0, 3.0, 2.0, 3.0, 4.0, 3.0, 1.5, 2.0 and 1.5 as a
raw material; an aluminum
alloy structural member with good comprehensive performance such as high performance, full compactness and high fatigue life is directly finished from a part digital model in one step. The method has the characteristics of low cost, short period and high material
utilization rate, and is suitable for integrated quick forming manufacturing of large-sized and complex aluminum alloy structural members; the shapes and the sizes of the prepared parts are not limited, and the requirement on structural integration can be met.