Preparation method of porous magnesium rare earth alloy implant based on laser selective melting (SLM) additive manufacturing technology

A laser selective melting, magnesium rare earth alloy technology, applied in the preparation of porous magnesium rare earth alloy implants, laser selective melting additive manufacturing technology to prepare porous implants, can solve the problem of large differences in porous structure wall thickness, human bone Poor matching, low overall strength and modulus, etc., to achieve high overall strength and modulus, achieve functional and structural strength, and good consistency

Active Publication Date: 2019-11-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is relatively ingenious to obtain a three-dimensional interconnected porous structure, because the solid part of the magnesium alloy porous structure is formed through the gaps of titanium particles or iron particles, the wall thickness of the porous structure varies greatly, and the overall strength and modulus of the porous structure are low. Based on human bones, poor matching with human bones

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  • Preparation method of porous magnesium rare earth alloy implant based on laser selective melting (SLM) additive manufacturing technology
  • Preparation method of porous magnesium rare earth alloy implant based on laser selective melting (SLM) additive manufacturing technology

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Embodiment 1

[0038] see Figure 1-2 . Such as Figure 1-2 As shown, the embodiment of the present invention provides a method for preparing a porous magnesium rare earth alloy implant based on laser selective melting (SLM) additive manufacturing technology, comprising the following steps:

[0039] Step 1, selecting the components of the magnesium rare earth alloy powder;

[0040] Step 2, preheating the magnesium rare earth alloy powder in a vacuum drying oven, the preheating time is 1.5h, and the preheating temperature is 100°C;

[0041] Step 3, selecting a magnesium rare earth alloy with the same composition as the magnesium rare earth alloy powder in step 1 as the substrate, and preheating the substrate;

[0042] Step 4, draw a three-dimensional model of the porous magnesium rare earth alloy implant on the computer through three-dimensional design software, and generate a porous magnesium rare earth alloy implant entity, wherein the porous pore diameter is 500 μm, and the porous wall ...

Embodiment 2

[0060] The embodiment of the present invention provides a method for preparing a porous magnesium rare earth alloy implant based on selective laser melting (SLM) additive manufacturing technology, comprising the following steps:

[0061] Step 1, selecting the components of the magnesium rare earth alloy powder;

[0062] Step 2, preheating the magnesium rare earth alloy powder in a vacuum drying oven, the preheating time is 1.5h, and the preheating temperature is 100°C;

[0063] Step 3, selecting a magnesium rare earth alloy with the same composition as the magnesium rare earth alloy powder in step 1 as the substrate, and preheating the substrate;

[0064] Step 4, draw a three-dimensional model of the porous magnesium rare earth alloy implant on the computer through three-dimensional design software, and generate a porous magnesium rare earth alloy implant entity, wherein the porous pore diameter is 500 μm, and the porous wall thickness is 300 μm;

[0065] Step 5. Save the por...

Embodiment 3

[0081] The embodiment of the present invention provides a method for preparing a porous magnesium rare earth alloy implant based on selective laser melting (SLM) additive manufacturing technology, comprising the following steps:

[0082] Step 1, selecting the components of the magnesium rare earth alloy powder;

[0083] Step 2, preheating the magnesium rare earth alloy powder in a vacuum drying oven, the preheating time is 1.5h, and the preheating temperature is 100°C;

[0084] Step 3, selecting a magnesium rare earth alloy with the same composition as the magnesium rare earth alloy powder in step 1 as the substrate, and preheating the substrate;

[0085] Step 4, draw a three-dimensional model of the porous magnesium rare earth alloy implant on the computer through three-dimensional design software, and generate a porous magnesium rare earth alloy implant entity, wherein the porous pore diameter is 500 μm, and the porous wall thickness is 300 μm;

[0086] Step 5. Save the por...

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Abstract

The invention provides a preparation method of a porous magnesium rare earth alloy implant based on a laser selective melting (SLM) additive manufacturing technology. The method comprises the following steps that 1, components of magnesium rare earth alloy powder are selected; 2, the magnesium rare earth alloy powder is preheated; 3, a substrate is preheated; 4, a three-dimensional model of the porous magnesium rare earth alloy implant is drawn; 5, a porous magnesium rare earth alloy implant entity is stored into an output format file in an STL format and transmitted to layering software, a bottom surface support is added, and slicing treatment is carried out; 6, the porous magnesium rare earth alloy implant entity is printed; 7, the porous magnesium rare earth alloy implant molding pieceand the substrate are cut and separated; and 8, electrochemical polishing treatment is carried out. The porous implant prepared by the method has uniform hole wall thickness, no crack defect and highoverall strength and modulus; and the porous implant prepared by the method is better matched with the strength and modulus of human bones.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and relates to a preparation method of a porous magnesium rare earth alloy implant based on selective laser melting (SLM) additive manufacturing technology, and specifically involves passing magnesium rare earth alloy powder through selective laser melting (SLM) Additive manufacturing technology prepares porous implants, which are mainly used for repairing human bone after injury. Background technique [0002] Among biomedical metal implant materials, magnesium and its alloys have attracted worldwide attention and research due to their good mechanical properties, biocompatibility and degradability, and have become a new generation of intraosseous implants, vascular stents, It is an ideal material for dental and plastic implants, and is known as "revolutionary metal biomaterial". The porous magnesium-based implant with three-dimensional connectivity can not only fill the implan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/11B22F3/24C25F3/18C22C23/06A61L27/04A61L27/56A61L27/58B33Y10/00B33Y50/02
CPCB22F3/11B22F3/24C25F3/18C22C23/06A61L27/047A61L27/56A61L27/58B33Y10/00B33Y50/02B22F2003/247A61L2430/02B22F10/00B22F10/36B22F10/66B22F10/28B22F12/13Y02P10/25
Inventor 王南清付彭怀廖海光陈娟彭立明
Owner SHANGHAI JIAO TONG UNIV
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