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Medical zinc alloy stent and production method thereof

A production method and zinc alloy technology, applied in the field of medical materials, can solve problems such as reducing the structural strength of the stent, and achieve the effects of avoiding movement disorders, improving tensile strength and excellent plasticity

Active Publication Date: 2020-06-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the internal stress of the magnesium alloy stent can be weakened by annealing, this will greatly reduce the structural strength of the stent

Method used

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  • Medical zinc alloy stent and production method thereof
  • Medical zinc alloy stent and production method thereof
  • Medical zinc alloy stent and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: The design content of alloy elements copper and magnesium is 0.2wt.% and 0.1wt.%, respectively, and it needs to be added appropriately during smelting. The preparation process is as follows:

[0044] (1) Mix and smelt high-purity zinc, high-purity copper and high-purity magnesium, pour them into a water-cooled mold, and obtain alloy ingots;

[0045] (2) Homogenize the ingot obtained in step (1), the treatment temperature is 390°C, and the time is 48h;

[0046] (3) extruding the alloy ingot obtained in step (2) into a thick wire with a diameter of 2.5mm, the extrusion ratio is 16:1, the extrusion temperature is 240°C, and the extrusion speed is 5mm / s;

[0047] (4) the thick wire gained in the step (3) is produced in parallel at room temperature in multiple lines, continuously drawn into thin wires with a diameter of 0.3mm, the amount of deformation in a single pass is 15%, and the initial drawing speed is 8mm / s;

[0048] (5) The multi-strand zinc alloy wire...

Embodiment 2

[0052] Example 2: The design content of alloy elements copper and magnesium is 0.1wt.% and 0.05wt.%, respectively, and it needs to be added appropriately during smelting. The preparation process is as follows:

[0053] (1) Mix and smelt high-purity zinc, high-purity copper and high-purity magnesium, pour them into a water-cooled mold, and obtain alloy ingots;

[0054] (2) homogenize the ingot obtained in step (1), the treatment temperature is 380°C, and the time is 48h;

[0055] (3) Extruding the alloy ingot obtained in the step (2) into a thick wire with a diameter of 2.5mm, the extrusion ratio is 16:1 and the extrusion temperature is 230°C, and the extrusion speed is 5mm / s;

[0056] (4) the thick wire gained in the step (3) is produced in parallel at room temperature in multiple lines, continuously drawn into thin wires with a diameter of 0.3mm, the amount of deformation in a single pass of drawing is 20%, and the initial drawing speed is 10mm / s;

[0057] (5) The multi-st...

Embodiment 3

[0061] Example 3: The design content of alloying elements copper and magnesium is 0.3wt% and 0.15wt%, respectively, and it needs to be added appropriately during smelting. The preparation process is as follows:

[0062] (1) Mix and smelt high-purity zinc, high-purity copper and high-purity magnesium, pour them into a water-cooled mold, and obtain alloy ingots;

[0063] (2) Homogenizing the ingot obtained in step (1), the treatment temperature is 400°C, and the time is 48h;

[0064] (3) extruding the alloy ingot obtained in step (2) into a thick wire with a diameter of 2.5mm, the extrusion ratio is 16:1, the extrusion temperature is 250°C, and the extrusion speed is 5mm / s;

[0065] (4) the thick wire gained in the step (3) is produced in parallel at room temperature in multiple lines, continuously drawn into thin wires with a diameter of 0.3mm, the amount of deformation in a single pass is 10%, and the initial drawing speed is 5mm / s;

[0066] (5) The multi-strand zinc alloy ...

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Abstract

The invention discloses a medical zinc alloy stent and a production method thereof, and belongs to the technical field of medical materials. The alloy element content of the stent is low, and wires ofthe stent have continuous drawing high plasticity and annealing strength toughening effects that other biomedical degradable alloy wires do not have. According to the characteristics, the continuousdrawing zinc alloy wires in the stent can be woven into a stent product through a seamless connection stent weaving machine, and the production efficiency is extremely high. After the woven stent is annealed, the structural strength is greatly improved, the radial supporting force of the stent is increased, and the internal stress caused by drawing and weaving in the zinc alloy wires is weakened.The above characteristics are sufficient to indicate that the medical zinc alloy stent and the production method thereof can realize large-scale high-efficiency production; and due to the high plasticity of the wires after drawing, the forming breakage rate of the stent product is low, and a high stent yield can be maintained.

Description

technical field [0001] The invention belongs to the technical field of medical materials, and in particular relates to a medical zinc alloy bracket and a production method thereof. Background technique [0002] Magnesium-based, iron-based and zinc-based alloys are currently three biodegradable medical metal materials with promising application prospects. Iron-based alloys have outstanding mechanical properties, but the degradation is extremely slow and the degradation products are easy to accumulate and cause negative effects on the human body. Magnesium-based alloys have good biocompatibility in the human body. However, due to its very active chemical properties, it degrades too quickly in the human environment and loses the integrity of its mechanical properties prematurely. In most cases, it cannot be used until the affected area is cured. Zinc has a degradation rate between magnesium and iron. It is an essential trace element in the human body and participates in vario...

Claims

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Application Information

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IPC IPC(8): C22C18/02C22F1/16B22D7/00C21D9/00B21C37/04B23P15/00A61L31/02A61L31/14
CPCA61L31/022A61L31/148B21C37/047B22D7/005B23P15/00C21D9/0068C22C18/02C22F1/165
Inventor 白晶徐焱程兆俊范启洲薛烽周健
Owner SOUTHEAST UNIV
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