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Preparation method and application of biomedical degradable zinc alloy capillary tube

A biomedical and zinc alloy technology, which is applied in catheters, medical science, surgery, etc., can solve the problems of inconvenient preparation of high-plastic zinc alloy capillary tubes, etc., so as to save annealing heat treatment, shorten the process flow, and simple and convenient operation process Effect

Active Publication Date: 2019-06-21
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the limitations of the above prior art, the present invention aims to provide a preparation method and application of a biomedical degradable zinc alloy capillary tube according to the performance characteristics of the zinc alloy material, so as to overcome the inability of the prior art to conveniently prepare high Technical Difficulties of Plastic Zinc Alloy Capillary Tube

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment relates to a preparation method and application of a biomedical degradable zinc alloy capillary tube; the preparation method includes the following steps:

[0034] 1) Take the ingot of the cast zinc-copper binary alloy, carry out homogenization treatment, the treatment temperature is 350 ° C, the holding time is 8-10 hours, and quenching;

[0035] 2) Machining the heat-treated zinc alloy into a Φ60mm cylinder, which is the blank of the extruded bar;

[0036] 3) Heat the zinc alloy billet at 250°C for 1 hour, heat the extrusion die at the same temperature, and hot-extrude the preheated Φ60mm cylinder into a Φ20mm extruded bar;

[0037] 4) Peel off the outer skin from the Φ20mm extruded bar, and process it into a hollow pipe extrusion blank with an outer diameter of Φ19.5mm, an inner diameter of Φ7.8mm, and a height of 15mm;

[0038] 5) Under the same temperature conditions in step (3), replace the pipe extrusion die, and hot-extrude the preheated billet ...

Embodiment 2

[0044] This embodiment relates to a preparation method and application of a biomedical degradable zinc alloy capillary tube; the preparation method includes the following steps:

[0045] 1) Take the ingot of the cast zinc-lithium binary alloy, perform homogenization treatment, the treatment temperature is 380°C, the holding time is 8-10 hours, and then quenched;

[0046]2) Machining the heat-treated zinc alloy into a Φ60mm cylinder, which is the blank of the extruded bar;

[0047] 3) Heat the zinc alloy billet at 280°C for 1 hour, heat the extrusion die at the same temperature, and hot-extrude the preheated Φ60mm cylinder into a Φ20mm extruded bar;

[0048] 4) Peel off the outer skin from the Φ20mm extruded rod, and process it into a hollow pipe extrusion billet with an outer diameter of Φ19.5mm, an inner diameter of Φ4.8mm, and a height of 15mm;

[0049] 5) Under the same temperature conditions in step (3), replace the pipe extrusion die, and hot-extrude the preheated billet...

Embodiment 3

[0055] This embodiment relates to a preparation method and application of a biomedical degradable zinc alloy capillary tube; the preparation method includes the following steps:

[0056] 1) Take the cast ingot of the as-cast zinc-iron binary alloy, carry out homogenization treatment, the treatment temperature is 360°C, the holding time is 8 hours, and then quenched;

[0057] 2) Machining the heat-treated zinc alloy into a Φ60mm cylinder, which is the blank of the extruded bar;

[0058] 3) Heat the zinc alloy billet at 300°C for 1 hour, heat the extrusion die at the same temperature, and hot-extrude the preheated Φ60mm cylinder into a Φ20mm extruded bar;

[0059] 4) Peel off the outer skin from the Φ20mm extruded bar, and process it into a hollow pipe extrusion blank with an outer diameter of Φ19.5mm, an inner diameter of Φ2.8mm, and a height of 15mm;

[0060] 5) Under the same temperature conditions in step (3), replace the pipe extrusion die, and hot-extrude the preheated bi...

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Abstract

The invention discloses a preparation method and application of a biomedical degradable zinc-alloy capillary tube. The preparation method comprises the following steps: subjecting cast zinc alloy to heat treatment and machining so as to form a cylinder and carrying out hot extrusion on the cylinder to obtain an extruded bar; processing the extruded bar to form an extruded tube blank and carrying out hot extrusion on the extruded tube blank to obtain an intermediate tube with an external diameter Phi of 3 to 8 mm; carrying out a plurality of passes of room-temperature rolling until the capillary tube blank has an external diameter Phi of 2 to 3 mm and wall thickness of 0.10 to 0.20 mm; and carrying out room-temperature drawing to eventually obtain a capillary tube with a diameter Phi of 1 to 3 mm and carrying out annealing treatment so as to obtain the capillary tube for cutting stents and with yield strength Rp0.2 of 250 to 450 MPa, tensile strength of 280 to 460 Pa and elongation percentage of 11 to 72%. The biomedical degradable zinc-alloy capillary tube prepared in the invention has appropriate strength and excellent elongation percentage and is applicable to preparation of intravascular stents, nerve conduits and other medical implant products.

Description

technical field [0001] The invention relates to a preparation method in the technical field of biomaterials, in particular to a preparation method and application of a biomedical degradable zinc alloy capillary tube. Background technique [0002] Metal capillary, as the preparation material of degradable cardiovascular stents, nerve catheters and other implant products, has high requirements for strength, plasticity, degradation rate and dimensional accuracy. [0003] Through the search of the existing patent literature, it is found that the patent number: ZL201010204716.5, the preparation method of the biodegradable magnesium alloy intravascular stent; Pulling processing method; patent number: ZL 200710011663.3, a magnesium alloy ultra-fine thin-walled tube forming process for degradable vascular stents; the disclosed magnesium alloy capillary tubes are all thermoformed, and zinc alloy capillary tubes are made in a similar way There are many problems in the preparation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/15C22F1/16A61L31/02A61L31/14A61L29/02A61L29/14
CPCA61L29/02A61L29/148A61L31/022A61L31/148B21C37/15C22F1/165
Inventor 黄华唐子波袁广银
Owner SHANGHAI JIAOTONG UNIV
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