A kind of mg-y-nd-(la+ce)-zr biodegradable magnesium alloy and its preparation method

A magnesium alloy, mg-20%nd technology, used in surgery, medical science and other directions, can solve the problem of less research on the degradable properties of rare earth magnesium alloys, and achieve excellent mechanical properties and corrosion resistance, stable performance, and good processing. performance effect

Active Publication Date: 2021-05-18
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of mg-y-nd-(la+ce)-zr biodegradable magnesium alloy and its preparation method

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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

A Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy, characterized in that: the magnesium alloy is composed of the following components in mass percentage: Y: 3.0-4.5%, Nd: 2.0-3.5% , Zr: 0.3-1.0%, lanthanum-cerium composite rare earth: 0.05-0.5%, the rest is magnesium and unavoidable impurities, impurity content ≤ 0.1%, wherein the content of lanthanum and cerium in the lanthanum-cerium composite rare earth each accounts for 50%; preparation method As follows: batching - melting and casting - annealing - extrusion - finished product. The magnesium alloy of the present invention adopts a multi-element and small amount of design method, the proportioning is scientific and reasonable, the preparation process is simple, the prepared magnesium alloy has high density, reliable quality, excellent mechanical properties and corrosion resistance, and at the same time, the degradation rate is controllable, biophase It has excellent capacity, which can ensure that it will not be deformed and damaged after being made into a cardiovascular stent, and can be better matched with human tissues, so it has a wide application prospect 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 Mg-Y-Nd-(La+Ce)-Zr biodegradable magnesium alloy and a preparation method thereof. The alloy has Good mechanical properties, processing and shaping and degradable properties, suitable for cardiovascular stent interventional therapy. 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 of clinical treatment of ischemic cardiovascular and cerebrovascular diseases. Traditional 316L stainless steel, cobalt-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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