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A 3D forming method for large-scale and complex-shaped porous amorphous alloy parts

An amorphous alloy and complex shape technology, which is applied in the field of 3D printing technology and the forming of large-size amorphous alloy parts, and can solve the problems of simple shape, high efficiency and difficult processing.

Active Publication Date: 2017-02-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of small size, simple shape and difficult processing of amorphous alloy parts obtained by the existing preparation technology, the purpose of the present invention is to provide a 3D forming method for large-scale and complex-shaped porous amorphous alloy parts. Low cost and high efficiency can realize the industrialization of porous amorphous alloy parts with large size and complex shape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The present embodiment prepares a kind of medical implant Zr 43.9 Cu 41.2 al 7.9 Nb 2 Ag 5 Porous amorphous alloy femoral stem, which is a porous structure with a pore size of 200 μm and a porosity of 80%, with a length of up to 120 mm and a maximum diameter of about 23 mm. It is a complex part with special shapes. The specific steps are as follows:

[0033] Step 1: Preparation of 3D printing powder materials

[0034] (1) According to the nominal composition Zr 43.9 Cu 41.2 al 7.9 Nb 2 Ag 5 Put the elemental powder ingredients. Among them, the average particle size of each elemental powder is 75 μm; the uniformly mixed powder is placed in a planetary ball mill (QM-2SP20) for high-energy ball milling. 15mm, 10mm and 6mm, the weight ratio of the three kinds of grinding balls is 1:3:1. The high-energy ball milling process parameters are as follows: the ball milling tank is filled with high-purity argon (99.999%, 0.5MPa) for protection, the ball-material ratio is...

Embodiment 2

[0042] The present embodiment prepares a kind of medical implant Ti 50 Cu 20 Ni 25 co 5 Porous amorphous alloy femoral stem, which is a porous structure with a pore size of 400 μm and a porosity of 85%. The pores are distributed within 2mm of the surface layer of the femoral stem, and the interior is a fully dense structure. The length of the femoral stem can reach 120mm, and the maximum diameter is about 23mm. For a special-shaped complex part, the specific steps are as follows:

[0043] Step 1: Preparation of 3D printing powder materials

[0044] (1) According to the nominal composition Ti 50 Cu 20 Ni 25 co 5 Put the elemental powder ingredients. Among them, the average particle size of each elemental powder is 75 μm; the uniformly mixed powder is placed in a planetary ball mill (QM-2SP20) for high-energy ball milling. 15mm, 10mm and 6mm, the weight ratio of the three kinds of grinding balls is 1:3:1. The high-energy ball milling process parameters are as follows: ...

Embodiment 3

[0052] The present embodiment prepares a kind of medical Zr 43.9 Cu 41.2 al 7.9 Nb 2 Hf 5 The porous bone filling material has a porous structure with a pore size of 500 μm and a porosity of 60%. The pores are evenly distributed inside the material. The length of the filling material is 100 mm and the diameter is about 20 mm. The specific steps are as follows:

[0053] Step 1: Preparation of 3D printing powder materials

[0054] (1) According to the nominal composition Zr 43.9 Cu 41.2 al 7.9 Nb 2 Hf 5 Put the elemental powder ingredients. Among them, the average particle size of each elemental powder is 75 μm; the uniformly mixed powder is placed in a planetary ball mill (QM-2SP20) for high-energy ball milling. 15mm, 10mm and 6mm, the weight ratio of the three kinds of grinding balls is 1:3:1. The high-energy ball milling process parameters are as follows: the ball milling tank is filled with high-purity argon (99.999%, 0.5MPa) for protection, the ball-to-material r...

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Abstract

The invention discloses a 3D (Three Dimensional) forming method for a large-sized porous amorphous alloy part of a complex shape. The method comprises the following steps: preparing amorphous alloy powder through mechanical alloying pulverization in combination with plasma spherizing or atomization; then sintering metal powder by using selective laser so as to prepare the large-sized porous amorphous alloy part with the complex shape. The method has the advantages that the problems such as small critical dimension of amorphous alloy formed by a water quenching method and a copper mold casting method and difficulty in selection of a pore forming agent are solved, the 3D preparation and forming of the large-sized porous amorphous alloy part are realized, the part with the complex shape can be prepared, the defect of difficulty in machining of the amorphous alloy material is overcome, the amorphous alloy part of the porous structure can be conveniently formed, the pore size and the volume fraction can be flexibly adjusted, and the method has the advantages of raw material saving, high efficiency, low cost and the like and is suitable for industrialized preparation of the amorphous alloy part.

Description

technical field [0001] The invention belongs to the technical field of 3D printing technology and the forming of large-size amorphous alloy parts, and in particular relates to a 3D forming method of large-size porous amorphous alloy parts with complex shapes. Background technique [0002] Amorphous alloys have attracted much attention since their appearance in the 1960s. Amorphous alloys have a unique glassy structure. While retaining the properties of metal materials, they also have better mechanical, physical and chemical properties than traditional crystalline alloys. They are widely used in aerospace, military, chemical, medical, electronics, instrumentation, Sports equipment and other fields have broad application prospects. Porous amorphous alloy materials have attracted more and more interest in recent years because of the combination of the advantages of porous materials and amorphous alloys, such as light weight, high yield strength, and good energy absorption perf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105
Inventor 杨超丁智王芬李元元
Owner SOUTH CHINA UNIV OF TECH
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