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Three-dimensional lattice material and its preparation method based on electron beam selective melting technology

A three-dimensional lattice and selective melting technology, which is applied in the directions of additive manufacturing, process efficiency improvement, energy efficiency improvement, etc. problem, to achieve the effect of stable and reliable calculation basis and stable compression performance

Active Publication Date: 2019-09-10
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing results show that the fracture mode of the titanium-based three-dimensional lattice material prepared by the electron beam selective melting molding technology is brittle fracture, and the compression stress-strain curve shows jagged fluctuations, and the reproducibility of such fluctuations Poor, unable to provide designers with reliable mechanical performance parameters, which greatly limits the application of electron beam selective melting molding technology in energy absorption, medical implants and other industries
[0005] From the above analysis, it can be seen that the traditional preparation method not only brings great difficulties to the selection of matrix materials and the design of material properties, but also makes it difficult to adjust the material properties by adjusting the unit cell structure. The preparation of three-dimensional lattice materials in the form of unit cells, but the repeatability of material properties is poor, and the popularization and application of three-dimensional metal lattice materials cannot be realized

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  • Three-dimensional lattice material and its preparation method based on electron beam selective melting technology
  • Three-dimensional lattice material and its preparation method based on electron beam selective melting technology
  • Three-dimensional lattice material and its preparation method based on electron beam selective melting technology

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Embodiment 1

[0038] The three-dimensional lattice material based on electron beam selective melting technology in this embodiment includes a three-dimensional structure formed by superimposing a plurality of basic units, the basic unit is composed of a plurality of isosceles triangles, and the tops of the plurality of isosceles triangles coincide, the waist of the isosceles triangle is a solid rod body, the rest of the isosceles triangle is a virtual body, and there is a waist overlap between two adjacent isosceles triangles; the material of the three-dimensional structure is Titanium or titanium alloys.

[0039] In this embodiment, the material of the three-dimensional structure is Ti-6Al-4V titanium alloy.

[0040] In this embodiment, the length L of the solid rod body is 3.0 mm, the cross-sectional shape of the solid rod body is circular, the equivalent diameter d of the solid rod body cross-section is 0.3 mm, and the solid rod body is melted with electron beam selection The angle θ betw...

Embodiment 2

[0053] In this embodiment, the three-dimensional lattice material based on electron beam selective melting technology includes a three-dimensional structure composed of a plurality of basic units superimposed, and dense plates are arranged on the upper and lower parts of the three-dimensional structure, and the basic unit is composed of multiple isosceles triangles, the apexes of multiple isosceles triangles overlap, the waist of the isosceles triangles is a solid rod, the rest of the isosceles triangles are phantoms, and between two adjacent isosceles triangles is a solid body. There is a waist overlap between them; the materials of the three-dimensional structure and the dense panel are pure titanium or titanium alloy.

[0054] In this embodiment, the material of the three-dimensional structure and the dense panel is Ti-6Al-4V titanium alloy.

[0055] In this embodiment, the length L of the solid rod body is 2.7 mm, the cross-sectional shape of the solid rod body is a regula...

Embodiment 3

[0068] The three-dimensional lattice material based on electron beam selective melting technology in this embodiment includes a three-dimensional structure formed by superimposing a plurality of basic units, the basic unit is composed of a plurality of isosceles triangles, and the tops of the plurality of isosceles triangles coincide, the waist of the isosceles triangle is a solid rod body, the rest of the isosceles triangle is a virtual body, and there is a waist overlap between two adjacent isosceles triangles; the material of the three-dimensional structure is Titanium or titanium alloys.

[0069] In this embodiment, the material of the three-dimensional structure is Ti-6Al-4V titanium alloy.

[0070] In this embodiment, the length L of the solid rod body is 20 mm, the cross-sectional shape of the solid rod body is a regular octagon, the equivalent diameter d of the solid rod body cross-section is 5.0 mm, and the solid rod body is melted with electron beam selection The an...

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Abstract

The invention provides a three-dimensional lattice material based on electron beam selective melting technology, which includes a three-dimensional structure formed by superimposing a plurality of basic units. The basic unit is composed of a plurality of isosceles triangles. The tops of the isosceles triangles overlap each other, the waists of the isosceles triangles are solid rods, the rest of the isosceles triangles are phantoms, and there is a waist overlapping between two adjacent isosceles triangles; the three-dimensional three-dimensional The material of the structure is pure titanium or titanium alloy. The invention also provides a method for preparing the lattice material. The three-dimensional lattice material provided by the present invention is mainly composed of a plurality of basic units superimposed. After being processed by electron beam selective melting, vacuum annealing, and chemical corrosion, it has stable compression performance, and its compression curve shows obvious plasticity. The yield platform shape provides a stable and reliable calculation basis for structural designers.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing of metal components, and in particular relates to a three-dimensional lattice material based on electron beam selective melting technology and a preparation method thereof. Background technique [0002] Three-dimensional lattice material is a typical structural-functional integration material, which belongs to the category of porous materials. It is an ordered porous material with high porosity and periodic structure composed of nodes and connecting rod units. Compared with traditional metal foam and metal honeycomb materials, three-dimensional metal lattice materials based on light metals such as titanium and aluminum alloys have higher specific strength, specific stiffness and energy absorption per unit mass, especially when the relative density is relatively high. At a low temperature, the three-dimensional lattice material has particularly outstanding mass efficiency and perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105
CPCB22F10/00B22F10/38B22F10/62B22F10/64B22F10/28B22F10/362B22F10/32Y02P10/25
Inventor 汤慧萍杨坤王建刘楠贾亮杨广宇
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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