Preparation method of medical Ti6Al4V artificial implant

An implant and artificial technology, applied in medical science, additive processing, prosthesis, etc., can solve the problems of cytotoxicity, fatigue life can not be guaranteed, reduce usage, improve structural stability and reliability, Reduce the effect of stress shielding and stress shielding

Active Publication Date: 2019-04-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fatigue life of the material in the first method cannot be guaranteed
The second method introduces new alloying elements, which may be cytotoxic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, the Arcam A2XX 3D printer of xuanAcram Company can be used to prepare bulk Ti6Al4V alloy by electron beam fusion deposition method, and Arcam Ti6Al4V powder P1034 is used as raw material to prepare bulk Ti6Al4V alloy, wherein the composition of Ti6Al4V alloy powder is: aluminum Al5.6 %, vanadium V 3.6%, iron Fe 0.2%, carbon C 0.01%, nitrogen N 0.006%, hydrogen H 0.012%, oxygen O 0.19%, and the rest is titanium. The printing process parameters used are: the electron beam power is 90kW / cm 2 , the powder coating thickness is 40μm, the scanning speed is 950mm / sec, and the temperature inside the printer case is kept at 650°C during the whole process. Put the prepared bulk Ti6Al4V alloy into a quartz glass tube and vacuum seal it as a sample. Then put the sample into the heat treatment furnace for heating. Firstly, the temperature is raised from room temperature to 500°C and kept for 10 minutes, then the temperature is raised to 1000°C with a heating rate of...

Embodiment 2

[0031] In this embodiment, the Arcam A2XX 3D printer of Acram Company can be used to prepare bulk Ti6Al4V alloy by electron beam fusion deposition method, and Arcam Ti6Al4V powder P1034 is used as raw material to prepare bulk Ti6Al4V alloy, wherein the composition of Ti6Al4V alloy powder is: aluminum Al 6.26% , vanadium V 4.18%, iron Fe0.2%, carbon C0.01%, nitrogen N 0.006%, hydrogen H0.012%, oxygen O 0.13%, and the rest is titanium. The printing process parameters used are: the electron beam power is 100kW / cm 2 , the powder coating thickness is 50μm, the scanning speed is 1000mm / sec, and the temperature inside the printer case is kept at 700°C during the whole process. Put the prepared bulk Ti6Al4V alloy into a quartz glass tube and vacuum seal it. Then put the sample into the heat treatment furnace for heating. Firstly, the temperature is raised from room temperature to 550°C and kept for 5 minutes, then the temperature is raised to 1100°C with a heating rate of 15°C / min, k...

Embodiment 3

[0035] In this embodiment, the Arcam A2XX3D printer of Acram Company can be used to prepare bulk Ti6Al4V alloy by electron beam fusion deposition method, and Arcam Ti6Al4V powder P1034 is used as raw material to prepare bulk Ti6Al4V alloy, wherein the composition of Ti6Al4V alloy powder is: aluminum Al 6.5% , vanadium V 4%, iron Fe0.1%, carbon C0.01%, nitrogen N 0.006%, hydrogen H0.012%, oxygen O 0.16%, and the rest is titanium. The printing process parameters used are: the electron beam power is 110kW / cm 2 , the powder coating thickness is 60 μm, the scanning speed is 1100mm / sec, and the temperature inside the printer case is kept at 725°C during the whole process. Put the prepared bulk Ti6Al4V alloy into a heat treatment furnace and protect it with argon. To heat the bulk Ti6Al4V alloy, firstly, the temperature was raised from room temperature to 650°C and kept for 15 minutes, and then the temperature was raised to 1200°C at a heating rate of 15°C / min, kept for 2 hours, and...

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Abstract

The invention relates to a preparation method of a medical Ti6Al4V artificial implant. The preparation method comprises the following steps of with Ti6Al4 alloy powder as a raw material, preparing theraw material into block-shaped Ti6Al4V alloy by an electron beam melting deposit method; and performing heat treatment on the block-shaped Ti6Al4V alloy to obtain the implant. The tensile strength achieves 960-990MPa, the yield strength can achieve 940-970MPa, the modulus of elasticity can achieve 30-40GPa and is close to the modulus of bones of human bodies, and the stress shielding and the stress protection are reduced.

Description

technical field [0001] The invention belongs to the field of additive manufacturing of medical titanium alloys, and in particular relates to a method for preparing an electron beam fusion deposition medical Ti6Al4V artificial implant. Background technique [0002] With the rapid development of my country's national economy, the number of artificial joint replacement operations has increased year by year. At present, the titanium alloy artificial joints used in our country are generally obtained by forging titanium alloy through CNC machine tools. The elastic modulus of the artificial joint manufactured by this traditional subtractive method is generally 100-110GPa, while the bone modulus of the human body is generally 10-30GPa. After implantation in the human body, it is easy to cause stress shielding and stress shielding, resulting in thigh pain and bone resorption. . At the same time, the titanium alloy artificial joint manufactured by the traditional subtractive method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/06A61L27/50B33Y80/00B33Y70/00B33Y10/00C22C1/02C22F1/18C22C14/00
CPCA61L27/06A61L27/50A61L2430/24B33Y10/00B33Y70/00B33Y80/00C22C1/02C22C14/00C22F1/183
Inventor 高海燕陈迪王燎王俊李敏张恒辉
Owner SHANGHAI JIAO TONG UNIV
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