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Medical magnesium alloy material and preparation method thereof

A magnesium alloy and master alloy technology, applied in medical science, prosthesis, etc., can solve the problems of mechanical performance degradation, inflammation, unsatisfactory, etc., achieve good absorbability, good biocompatibility, and reduce stress shielding effect of effect

Inactive Publication Date: 2020-01-10
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rapid degradation rate of biomagnesium alloys in the human body environment, the mechanical properties decline and cannot meet the requirements of mechanical properties as medical metal implant materials; at the same time, the gas generated by degradation and the increase of pH may cause inflammation

Method used

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  • Medical magnesium alloy material and preparation method thereof
  • Medical magnesium alloy material and preparation method thereof
  • Medical magnesium alloy material and preparation method thereof

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preparation example Construction

[0030] A preparation method of medical magnesium alloy material, comprising

[0031] Surface cleaning step: cleaning the surface of the raw material high-purity magnesium, magnesium-zinc, and magnesium-calcium master alloy;

[0032] Mold preheating step: grind the mold with sandpaper to remove impurities such as rust on the surface, and then put the steel mold into the preheating furnace for preheating;

[0033] Melting and mixing steps: clean up the impurities in the iron crucible, put the cut magnesium ingot into the crucible, then put the crucible into the protective atmosphere resistance furnace and heat it to 350-450°C, then pass in the shielding gas, and wait for the temperature to rise When the magnesium ingot is completely melted, add the weighed intermediate alloy, and at the same time fully stir the refined alloy to mix evenly;

[0034] Cooling step: After the alloy is mixed evenly, lower the temperature of the protective atmosphere resistance furnace to 650-700°C, ...

Embodiment 1

[0040] A preparation method of medical magnesium alloy material, comprising the following steps:

[0041] 1) According to the mass percentage of elements in the alloy: 0.2% zirconium, 4% zinc, 0.5% calcium, and the rest being magnesium, take the required master alloy, and grind the raw material with a grinding wheel to remove surface oxides;

[0042] 2) Grinding the casting steel mold with sandpaper to remove impurities such as rust on the surface, and then putting the steel mold in a preheating furnace at 200°C for preheating; at the same time cleaning the iron crucible to remove various impurities therein;

[0043] 3) Put the cut magnesium ingot into the crucible, then put the crucible into a well-type protective atmosphere resistance furnace and heat it to 400°C, then pass in a mixed protective gas (99%CO2+1%SF6), and wait for the temperature to rise When the temperature reaches about 720°C and the magnesium ingot is completely melted, add the weighed intermediate alloy and...

Embodiment 2

[0047] A preparation method of medical magnesium alloy material, comprising the following steps:

[0048] 1) According to the mass percentage of elements in the alloy: 0.4% zirconium, 4% zinc, 0.5% calcium, and the rest being magnesium, take the required master alloy, and grind the raw material with a grinding wheel to remove surface oxides;

[0049] 2) Grinding the casting steel mold with sandpaper to remove impurities such as rust on the surface, and then putting the steel mold in a preheating furnace at 200°C for preheating; at the same time cleaning the iron crucible to remove various impurities therein;

[0050] 3) Put the cut magnesium ingot into the crucible, then put the crucible into a well-type protective atmosphere resistance furnace and heat it to 400 ° C, and then pass a mixed protective gas (99% CO 2 +1%SF 6 ), when the temperature rises to about 720°C and the magnesium ingot is completely melted, add the weighed master alloy, and at the same time fully stir and r...

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Abstract

The invention discloses a medical magnesium alloy material. The material is composed of the following chemical components by weight percentage: 4 wt% of Zn, 1 wt%-3 wt% of Zr, 0.5wt% of calcium and the balance of magnesium. The invention also discloses a preparation method of the medical magnesium alloy material. The method comprises the steps of surface cleaning, mold preheating, melting and mixing, temperature reduction, and casting molding. The medical magnesium alloy material and the preparation method thereof effectively improve the corrosion resistance of the alloy, improve the uniformity of the metal material structure, and meet the requirements of biomedical metal implant materials.

Description

technical field [0001] The invention relates to the technical field of biomedical metal materials and their manufacture, in particular to a medical corrosion-resistant magnesium alloy material and a preparation method thereof. Background technique [0002] At present, the clinically used medical metal materials are mainly stainless steel, titanium alloy, and cobalt-chromium alloy. These materials have excellent mechanical properties and corrosion resistance; however, the elastic modulus of these materials is much different from that of natural bone. Large, it may cause stress shielding effect during use, which is not conducive to bone healing. More importantly, most of these metal materials are permanent implant materials. After the patient's fracture heals, he needs to undergo a second operation to remove it, which increases the pain and financial burden of the patient. [0003] In view of the limitations of existing medical implant materials, the development of new medica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04A61L27/04C22C1/03B22D7/00
CPCA61L27/047B22D7/005C22C1/03C22C23/04
Inventor 田君李文芳陈福瑞王康易爱华祝闻廖忠淼张智诚
Owner DONGGUAN UNIV OF TECH
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