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Zinc alloy material for degradable cardiovascular stent and preparation method of zinc alloy material

A zinc alloy and cardiovascular technology, applied in the field of materials, can solve the problems of unsatisfactory mechanical properties, medical metal use requirements, zinc alloy structure, etc., to reduce the risk of infection, improve strength, and weaken the effect of galvanic corrosion.

Pending Publication Date: 2021-09-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation process of zinc-magnesium-manganese alloy to solve the problem that the current zinc alloy structure and composition are not uniform, and the mechanical properties cannot meet the requirements for the use of medical metals

Method used

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  • Zinc alloy material for degradable cardiovascular stent and preparation method of zinc alloy material
  • Zinc alloy material for degradable cardiovascular stent and preparation method of zinc alloy material
  • Zinc alloy material for degradable cardiovascular stent and preparation method of zinc alloy material

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Experimental program
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Effect test

Embodiment 1

[0028] The composition of the zinc-magnesium-manganese alloy contains Mg 0.03%, Mn 0.03%, unavoidable impurities ≤ 10ppm, and Zn as the balance.

[0029] (1) Prepare metal zinc, metal magnesium, metal manganese and phosphorus as raw materials for smelting according to the composition, first heat metal zinc to 600±5° C., add metal magnesium, metal manganese and phosphorus (boiling point 350 ℃), after it is completely melted, stir evenly. Cool it down to 550±5°C, use a graphite bell jar to pass hexachloroethane into the molten metal, make it fully contact with the molten metal, and let it stand at 550±5°C for 15-20 minutes; melt the metal The body is lowered to 500±10°C, cast into a water-cooled iron mold and cooled to obtain an ingot;

[0030] (2) Secondary magnetic levitation smelting: the ingot is subjected to secondary magnetic levitation smelting to make the component uniformity deviation less than ±0.02wt.%, and the structure is uniform;

[0031] (3) Homogenization treat...

Embodiment 2

[0038] The composition of the zinc-magnesium-manganese alloy contains 0.05% of Mg, 0.05% of Mn, unavoidable impurities ≤ 10ppm, and the balance of Zn.

[0039] (1) Prepare metal zinc, metal magnesium, metal manganese and phosphorus as raw materials for smelting according to the composition, first heat metal zinc to 600±5° C., add metal magnesium, metal manganese and phosphorus (boiling point 350 ℃), after it is completely melted, stir evenly. Cool it down to 550±5°C, use a graphite bell jar to pass hexachloroethane into the molten metal, make it fully contact with the molten metal, and let it stand at 550±5°C for 15-20 minutes; melt the metal The body is lowered to 500±10°C, cast into a water-cooled iron mold and cooled to obtain an ingot;

[0040] (2) Secondary magnetic levitation smelting: the ingot is subjected to secondary magnetic levitation smelting to make the component uniformity deviation less than ±0.02wt.%, and the structure is uniform;

[0041] (3) Homogenization...

Embodiment 3

[0046] The composition of the zinc-magnesium-manganese alloy contains 0.07% of Mg and 0.07% of Mn by weight percentage, unavoidable impurities ≤ 10ppm, and the balance of Zn.

[0047] (1) Prepare metal zinc, metal magnesium, metal manganese and phosphorus as raw materials for smelting according to the composition, first heat metal zinc to 600±5° C., add metal magnesium, metal manganese and phosphorus (boiling point 350 ℃), after it is completely melted, stir evenly. Cool it down to 550±5°C, use a graphite bell jar to pass hexachloroethane into the molten metal, make it fully contact with the molten metal, and let it stand at 550±5°C for 15-20 minutes; melt the metal The body is lowered to 500±10°C, cast into a water-cooled iron mold and cooled to obtain an ingot;

[0048] (2) Secondary magnetic levitation smelting: the ingot is subjected to secondary magnetic levitation smelting to make the component uniformity deviation less than ±0.02wt.%, and the structure is uniform;

[00...

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Abstract

The invention relates to a zinc alloy material for a degradable cardiovascular stent and a preparation method of the zinc alloy material, and belongs to the technical field of materials. The zinc alloy material comprises, by weight, 0.03-0.07% of Mg, 0.03-0.07% of Mn, less than or equal to 10ppm of inevitable impurities and the balance Zn. The preparation method comprises the following steps that (1) pure zinc is heated to 600 + / -5 DEG C, melted, magnesium metal, manganese metal and phosphorus are sequentially added, and uniformly stirred, the temperature is reduced to 550 + / -5 DEG C, hexachloroethane is pressed to preserve heat and stand for 10-20 minutes, and metal melt is cooled to 500 + / -10 DEG C, and cast; (2) secondary magnetic suspension smelting is carried out, so that the component uniformity deviation is smaller than + / -0.02 wt.%; (3) heat is preserved at 350 DEG C for 5 hours, temperature is raised to 370 DEG C, heat is preserved for 5 hours, and cooling is performed to the room temperature in water; (4) heat preservation is conducted for 60-80 min at the temperature of 300-400 DEG C, and then hot forging deformation is conducted at the temperature of 300-400 DEG C; and (5) heat preservation is conducted for 30 min at the temperature of 150 DEG C, and then reverse hot extrusion deformation is conducted at the temperature of 150 DEG C. According to the zinc alloy material for the degradable cardiovascular stent and the preparation method of the zinc alloy material, a Zn-Mg-Mn alloy is excellent in mechanical property and uniform in tissue component, and can be used for preparing the biodegradable cardiovascular stent.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a zinc alloy material used for a degradable cardiovascular stent and a preparation method thereof. Background technique [0002] Due to its suitable degradation rate and good biocompatibility, zinc alloy has become the frontier and research hotspot of biodegradable scaffold materials. An important limitation of zinc alloy as a scaffold material is its low strength and plasticity, which are not enough to meet the application requirements. One of the most effective ways to improve the mechanical properties of metals is to add alloying elements to the metal matrix. Through the method of solid solution strengthening and second phase strengthening, the chemical composition and microstructure of the zinc-based alloy are changed to improve its mechanical properties, so as to develop a zinc-based alloy that is more suitable for use. [0003] However, with the addition of alloying ele...

Claims

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Application Information

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IPC IPC(8): C22C18/00C22F1/16A61L31/02B21C37/06C22C1/02
CPCC22C18/00C22C1/02B21C37/06C22F1/165A61L31/022
Inventor 李博轩吕金泽任玉平李洪晓秦高梧
Owner NORTHEASTERN UNIV
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