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A kind of preparation method of medical zinc alloy rod with superplasticity

A zinc alloy, superplastic technology, applied in the field of medical devices and biomedical materials, to achieve the effects of easy processing, preventing infection, and improving mechanical properties

Active Publication Date: 2022-04-01
SHANDONG RIENTECH MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to make the following improvements aimed at the deficiencies in the plastic deformation capacity of magnesium and zinc alloys in the prior art and the improvement of mechanical properties:

Method used

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  • A kind of preparation method of medical zinc alloy rod with superplasticity
  • A kind of preparation method of medical zinc alloy rod with superplasticity
  • A kind of preparation method of medical zinc alloy rod with superplasticity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Zinc-iron-copper alloy

[0037] The zinc-based alloy material of this embodiment is a zinc-iron-copper alloy, and the preparation process specifically includes the following steps:

[0038] 1) According to the mass percentage, 12wt% Fe, 1.8wt% Cu and the rest Zn (total impurity content 6 (1 vol.%) and CO 2 In the atmosphere, add high-purity graphite crucible to mix and smelt to obtain zinc-based alloy.

[0039] 2) After smelting, extrude the obtained zinc-based alloy into rods with a diameter of 100 mm and a length of 50 cm.

[0040] 3) After multiple annealing (temperature 200°C-500°C, 30min), the obtained rod is drilled and finally drawn to form a capillary with a diameter of 1.58mm and a wall thickness of 0.127mm, which is engraved by a femtosecond laser (engraving see flower type figure 1 ), intended for coronary stents.

[0041] Effect verification:

[0042] The zinc-based alloy material prepared by the above method has a yield strength of about...

Embodiment 2

[0045] Embodiment 2: zinc-iron-copper alloy

[0046] The zinc-based alloy material in this embodiment is a zinc-iron-copper alloy, which contains 0.2wt% iron, 0.5wt% copper, the balance is zinc, and the total impurity content is <0.001wt%. The preparation process is as follows:

[0047] 1) Put the raw materials into the smelting furnace according to the mass percentage and smelt them under the protection of inert gas to obtain a rod with a diameter of 100mm and a length of 500mm;

[0048] 2) Cut the rods into zinc alloy rods with a diameter of 8~10mm;

[0049] 3) Draw the medium bar in 2) to a thin cylindrical bar with a diameter of 3mm

Embodiment 3

[0050] Embodiment 3: zinc-copper alloy

[0051] The zinc-based alloy material in this embodiment is a zinc-copper alloy, which contains 0.80wt% copper, the balance is zinc, and the total impurity content is <0.001%. The preparation process is as follows (method 1):

[0052] 1) Copper and zinc are mixed and smelted in a high-purity graphite crucible according to the mass percentage, and the SF 6 and CO 2 Protected under the mixed gas atmosphere;

[0053] 2) Transfer the alloy melt to the mold, place a high-energy ultrasonic probe, and cool down step by step to form a rod with a diameter of 100mm and a length of 500mm;

[0054] 3) Heated and extruded into zinc alloy rods with a diameter of 8~10mm;

[0055] 4) 50 wires are drawn in each pass, and the thin alloy rod in 2) is drawn to a thin wire with a diameter of 3mm;

[0056] 5) Anneal the filament at 250°C for 10min.

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Abstract

The invention provides a method for preparing a superplastic zinc alloy stent material. Specifically, through the calculation of the first principle of the material, the alloy composition for different implantation parts is obtained. The main elements of the alloy include iron (Fe) and copper (Cu). and other metals are smelted in heating equipment to obtain alloy melts, which are subjected to high-energy ultrasonic treatment, and then cooled step by step in the mold to obtain zinc alloy ingots, which are sequentially extruded, drawn, and annealed to obtain superplastic Characteristic zinc alloy cylindrical rods. Through first-principle calculations, the properties and components of alloys required by different parts can be obtained, and the alloy melt can be degassed, impurity-removed, and grain-refined through high-energy ultrasonic treatment, and the crystallization process can be more balanced through the step-by-step cooling of the mold. . The vascular stent processed by the zinc alloy material has suitable supporting force, good compliance, stable plastic deformation ability and excellent degradability, and can be applied to blood vessels, cavities and orthopedic implants.

Description

technical field [0001] The invention belongs to the fields of medical equipment and biomedical materials. In particular, it relates to a superplastic degradable zinc alloy intravascular and intracavity support material, a bone plate bone nail material and a preparation method. Background technique [0002] Coronary atherosclerotic heart disease is one of the important causes of human death. At present, more than 2 million coronary heart disease patients in the world need percutaneous transluminal coronary angioplasty (PTCA), of which 70 Percent of PTCA operations need to implant vascular stents, but the restenosis rate after 6 months is as high as 20% to 30%, and about 10% of the patients need to implant stents again, which brings huge economic and psychological benefits to patients. on the burden. [0003] One of the mechanisms causing restenosis is elastic recoil. The human coronary artery is a muscular artery, and its inner elastic layer and outer elastic layer contain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L31/14A61L31/02A61L31/16C22C18/00C22C18/02C22C1/02C22F1/16
CPCA61L31/022A61L31/14A61L31/16C22C1/02C22C18/00C22C18/02C22F1/165A61L2300/102A61L2300/404A61L2300/412
Inventor 张海军王鲁宁周超冯相蓺张军伟宋彩霞崔晓珊徐凯丽赵彦伟万国江尹玉霞鲁守涛段翠海侯文博刘光
Owner SHANDONG RIENTECH MEDICAL TECH
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