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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  • Abstract
  • Description
  • Claims
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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 cur

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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Example Embodiment

[0027] Example 1

[0028] The zinc magnesium manganese alloy component contains 0.03%, Mn 0.03% by weight, and inevitable impurities ≤ 10 ppm, and the remaining amount is Zn.

[0029] (1) Preparation of metal zinc, metal magnesium, metal manganese, and phosphorus is prepared as a raw material according to the component, first heat metal zinc to 600 ± 5 ° C, and then add metal magnesium, metal manganese, phosphorus (boiling point 350) after it is melted. ° C), after all melting, stir evenly. It could be cooled to 550 ± 5 ° C, and hexachloroethane was introduced into the metal melt to the metal melt, allowed to completely contact the metal melt, standing for 15 to 20 min at 550 ± 5 ° C; melting the metal The body drops to 500 ± 10 ° C, cast into the water cold iron mold, and obtains ingot;

[0030] (2) Secondary magnetic suspension smelting: The quadratic magnetic suspension smelting of the ingot makes its ingredient uniformity deviation of less than ± 0.02 wt.%, And the tissue is u...

Example Embodiment

[0037] Example 2

[0038] Zinc magnesium manganese alloy ingredients contain 0.05%, Mn 0.05% by weight, and inevitable impurities ≤ 10 ppm, and the margin is Zn.

[0039] (1) Preparation of metal zinc, metal magnesium, metal manganese, and phosphorus is prepared as a raw material according to the component, first heat metal zinc to 600 ± 5 ° C, and then add metal magnesium, metal manganese, phosphorus (boiling point 350) after it is melted. ° C), after all melting, stir evenly. It could be cooled to 550 ± 5 ° C, and hexachloroethane was introduced into the metal melt to the metal melt, allowed to completely contact the metal melt, standing for 15 to 20 min at 550 ± 5 ° C; melting the metal The body drops to 500 ± 10 ° C, cast into the water cold iron mold, and obtains ingot;

[0040] (2) Secondary magnetic suspension smelting: The quadratic magnetic suspension smelting of the ingot makes its ingredient uniformity deviation of less than ± 0.02 wt.%, And the tissue is uniform;

[00...

Example Embodiment

[0045] Example 3

[0046] Zinc magnesium manganese alloy ingredient contains 0.07%, Mn 0.07% by weight, and ≤ 10 ppm, and the margin is Zn.

[0047] (1) Preparation of metal zinc, metal magnesium, metal manganese, and phosphorus is prepared as a raw material according to the component, first heat metal zinc to 600 ± 5 ° C, and then add metal magnesium, metal manganese, phosphorus (boiling point 350) after it is melted. ° C), after all melting, stir evenly. It could be cooled to 550 ± 5 ° C, and hexachloroethane was introduced into the metal melt to the metal melt, allowed to completely contact the metal melt, standing for 15 to 20 min at 550 ± 5 ° C; melting the metal The body drops to 500 ± 10 ° C, cast into the water cold iron mold, and obtains ingot;

[0048] (2) Secondary magnetic suspension smelting: The quadratic magnetic suspension smelting of the ingot makes its ingredient uniformity deviation of less than ± 0.02 wt.%, And the tissue is uniform;

[0049] (3) Homogenization ...

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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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