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Novel Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy and manufacturing method thereof

A magnesium alloy and a new technology are applied in the field of biomedical rare earth magnesium alloys, new Mg-Y-Nd--Zr biodegradable magnesium alloys and their preparation, which can solve the problems of less research on the degradability of rare earth magnesium alloys, etc. Achieve the effects of excellent mechanical properties and corrosion resistance, stable performance and good processability

Active Publication Date: 2019-11-19
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patents aim to improve the strength, shape or fatigue resistance of magnesium alloys at room temperature or high temperature, and are suitable for aerospace, military, and automotive fields. However, there are few studies on the degradable properties of rare earth magnesium alloys. Therefore, it is necessary to study a In the biomedical field, the degradation rate is uniform and controllable, the mechanical properties are reliable, and the biocompatibility is good. The degradable rare earth magnesium alloy replaces the traditional 316L stainless steel, cobalt-chromium alloy, titanium alloy and other permanent metal brackets to avoid its damage to the human body. Secondary injury has great practical significance

Method used

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  • Novel Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy and manufacturing method thereof

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Effect test

Embodiment 1

[0028] Its production process is as follows:

[0029] Batching - melting and casting - annealing - extrusion - finished product.

[0030] The specific process is: use a vacuum medium frequency induction furnace for melting, and distribute the ingredients according to the ingredients shown in Table 1. In the resistance furnace, preheat the crucible and mold to above 150°C, cool to 70°C-80°C, coat the ZnO coating, and then heat the crucible To 700°C, put in magnesium ingots and sprinkle covering agent, heat up to 850°C after the magnesium ingots melt, add master alloys Mg-20%Y, Mg-20%Nd and Mg-12%La-8%Ce , remove slag after stirring, then sprinkle into covering agent, keep warm for 20 minutes, heat up to 850℃~950℃, add Mg-30%Zr alloy, stir, remove slag, sprinkle solvent again, keep warm for 30 minutes and lower the temperature to 860°C, add refining agent for refining, let stand for 30 minutes, cool down to about 840°C, pour the melt into a steel mold with a preheating temperat...

Embodiment 2

[0032] Its production process is as follows:

[0033] Batching - melting and casting - annealing - extrusion - finished product.

[0034] The specific process is: use a vacuum medium frequency induction furnace for melting, and distribute the ingredients according to the ingredients shown in Table 1. In the resistance furnace, preheat the crucible and mold to above 150°C, cool to 70°C-80°C, coat the ZnO coating, and then heat the crucible To 700°C, put in magnesium ingots and sprinkle covering agent, heat up to 850°C after the magnesium ingots melt, add master alloys Mg-20%Y, Mg-20%Nd and Mg-12%La-8%Ce , remove slag after stirring, then sprinkle into covering agent, keep warm for 20 minutes, heat up to 850℃~950℃, add Mg-30%Zr alloy, stir, remove slag, sprinkle solvent again, keep warm for 30 minutes and lower the temperature to 860°C, add refining agent for refining, let stand for 30 minutes, cool down to about 840°C, pour the melt into a steel mold with a preheating temperat...

Embodiment 3

[0036] Its production process is as follows:

[0037] Batching - melting and casting - annealing - extrusion - finished product.

[0038] The specific process is: use a vacuum medium frequency induction furnace for melting, and distribute the ingredients according to the ingredients shown in Table 1. In the resistance furnace, preheat the crucible and mold to above 150°C, cool to 70°C-80°C, coat the ZnO coating, and then heat the crucible To 700°C, put in magnesium ingots and sprinkle covering agent, heat up to 850°C after the magnesium ingots melt, add master alloys Mg-20%Y, Mg-20%Nd and Mg-12%La-8%Ce , remove slag after stirring, then sprinkle into covering agent, keep warm for 20 minutes, heat up to 850℃~950℃, add Mg-30%Zr alloy, stir, remove slag, sprinkle solvent again, keep warm for 30 minutes and lower the temperature to 860°C, add refining agent for refining and let it stand for 30 minutes, cool down to about 840°C, pour the melt into a steel mold with a preheating te...

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Abstract

The invention discloses an Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy and a manufacturing method thereof. The Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy is characterized in that the magnesium alloy is manufactured from the following components in percentage by mass: 3.0-4.5% of Y, 2.0-3.5% of Nd, 0.3-1.0% of Zr, 0.05-0.5% of lanthanum cerium composite rare earth, and the balance beingmagnesium and inevitable impurities, wherein the impurity content is less than or equal to 0.1%, and lanthanum content and cerium content in the lanthanum cerium composite rare earth each account for50%; and the manufacturing method comprises the steps: batching, casting, annealing, extruding, and obtaining finished products. According to the magnesium alloy and the manufacturing method, a multi-element and small-amount design method is adopted, the proportion is scientific and reasonable, the manufacturing process is simple, the manufactured magnesium alloy is high in compactness, reliable in quality, excellent in mechanical property and corrosion resistance, controllable in degradation speed and excellent in biocompatibility, meanwhile, a cardiovascular stent made of the magnesium alloycannot be damaged for deformation and can be well matched with human tissues, and therefore the magnesium alloy has wide application prospects in the medical field.

Description

technical field [0001] The invention belongs to the technical field of biomedical metal material preparation, and relates to a biomedical rare earth magnesium alloy, in particular to a novel Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy and a preparation method thereof. It has good mechanical properties, processing and shaping and degradable properties, and is suitable for interventional treatment of cardiovascular stents. Background technique [0002] With the acceleration of population aging, the morbidity and mortality of cardiovascular and cerebrovascular diseases are gradually increasing and younger. At present, it has been recognized as the first killer of human beings. The prevention and treatment of cardiovascular diseases has become the focus of medical circles at home and abroad. focus. Stent implantation to reconstruct blood supply is an important means for the clinical treatment of ischemic cardiovascular and cerebrovascular diseases. Traditional 316L stainle...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03C22F1/06A61L31/02
CPCA61L31/022C22C1/03C22C23/06C22F1/06
Inventor 张将汤进军洪梦丽刘辰戴悦来王群张全孝黄伟明
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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