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

A three-dimensional lattice and selective melting technology, which is applied in the direction of additive manufacturing, process efficiency improvement, and energy efficiency improvement, can solve problems such as adjustment of unit cell structure, poor repeatability of material performance, and inability for designers to provide mechanical performance parameters. Achieve the effect of stable and reliable calculation basis and stable compression performance

Active Publication Date: 2016-10-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • 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 indu

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  • Three-dimensional lattice material based on electron beam selective melting technology and preparation method of three-dimensional lattice material based on electron beam selective melting technology
  • Three-dimensional lattice material based on electron beam selective melting technology and preparation method of three-dimensional lattice material based on electron beam selective melting technology
  • Three-dimensional lattice material based on electron beam selective melting technology and preparation method of three-dimensional lattice material 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. 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 between the deposition faces is 36°. Such as Figure 7 ...

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. 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 angle θ between the deposition faces is 45°. Such as ...

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Abstract

The invention provides a three-dimensional lattice material based on an electron beam selective melting technology. The three-dimensional lattice material comprises a three-dimensional structure made of pure titanium or titanium alloy and formed by superposition of a plurality of basic units, every basic unit consists of a plurality of isosceles triangles with vertexes coinciding, solid rods serve as the waists of every isosceles triangle, the rest portions of the isosceles triangles are virtual, and every two adjacent isosceles triangles coincide by one of their own waists. The invention further provides a preparation method of the three-dimensional lattice material. The three-dimensional lattice material based on the electron beam selective melting technology is mainly formed by superposition of the basic units, attains stable compression performance after being subjected to electron beam selective melting molding, vacuum annealing and chemical corrosion and shows an obvious plastic yielding platform shape in compression curve, thereby providing stable and reliable computing bases for structure 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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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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