Material and method for preparing aluminum alloy structural member by using laser 3D (Three-Dimensional) printing technology

Abstract

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.

Description

technical field [0001] The invention belongs to the field of laser rapid prototyping manufacturing, in particular to a material and method for preparing aluminum alloy structural parts by using laser 3D printing technology. Background technique [0002] Aluminum alloy has many excellent properties such as low density, low thermal expansion coefficient, high specific stiffness and specific strength, good thermal conductivity and electrical conductivity, strong light reflection, non-magnetic, corrosion resistance, etc. It is the most widely used material among non-ferrous metals. For example, in the national defense industry and civil aviation, aluminum alloy is the main material used for aircraft body structure, especially in fighter jets independently developed by my country, the proportion of aluminum alloy structural parts reaches more than 50% of the weight of the fuselage. [0003] Aviation aluminum alloy structural parts are generally manufactured by forging and machini...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a laser 3D printing method to solve the shortcomings of the existing technology, such as long time consumption, low material utilization rate and difficulty in meeting the requirements of structural integration. Materials and methods for preparing aluminum alloy structural parts without any special mold and any special tooling, on the aluminum alloy substrate, the mass percentages are: Al: 80.0, Fe: 3.0, Cu: 2.0, Si: 3.0, Ti : 4.0, B: 3.0, Mn : 1.5, C : 2.0, Ce: 1.5 powder as raw material through rapid melting and solidification of laser beams for "multi-layer cladding accumulation", directly from the digital model of the part to complete high performance and full density in one step Aluminum alloy structural parts of any size and shape with good comprehensive performance such as high fatigue life and high fatigue life