Preparation method of medical biodegradable zinc alloy capillary wire material

A technology of zinc alloy and capillary wire, which is applied in the field of preparation of medical biodegradable zinc alloy capillary wire, can solve problems such as poor mechanical properties, surface cracks, and affecting treatment effects

Active Publication Date: 2017-06-20
XIAN ADVANCED MEDICAL TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, in actual operation, most degradable polymer materials or magnesium alloy materials have poor mechanical properties, large wire or cable diameters, and are prone to fracture failures in the treatment of bundled fractures, which seriously affect the treatment effect.
[0003] Medical biodegradable zinc alloy is a new material, which belongs to the alloy material with low plasticity. The phenomenon of work hardening is very obvious. It is easy to have broken wires and surface cracks by using traditional processing methods such as stretching and cold drawing. Preparation of capillary wire with a diameter of about 0.1mm
Moreover, the microstructure of the material prepared by the traditional cold drawing method can only reach the micron level, not the nano level, which cannot meet the development requirements of plasticizing, strengthening, and fine-grained medical degradable materials, and does not meet the clinical treatment needs of orthopedic trauma

Method used

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  • Preparation method of medical biodegradable zinc alloy capillary wire material
  • Preparation method of medical biodegradable zinc alloy capillary wire material
  • Preparation method of medical biodegradable zinc alloy capillary wire material

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preparation example Construction

[0029] The invention provides a method for preparing a medical biodegradable zinc alloy capillary wire, comprising the following steps:

[0030] (1) Vacuum melting and homogenizing heat treatment of medical biodegradable zinc alloy in sequence to obtain zinc alloy ingot;

[0031] (2) removing surface defects and extruding the zinc alloy ingots obtained in the step (1) successively to obtain thick zinc alloy rods;

[0032] (3) swaging and annealing the thick zinc alloy rods obtained in the step (2) successively to obtain thin rods;

[0033] (4) After coating the surface of the fine rod obtained in the step (3) with a graphite lubricant coating and drawing it by cold drawing, a medical biodegradable zinc alloy capillary wire is obtained, and the diameter of the capillary wire is less than 0.1 mm.

[0034] The present invention does not have any special limitation on the source of the medical biodegradable zinc alloy, and the sources of the medical biodegradable zinc alloy or co...

Embodiment 1

[0070] Get the as-cast zinc alloy ingot (50mm×200mm outer diameter), peel off the outer skin with a lathe, and become an ingot with an outer diameter of 45mm. After homogenization heat treatment, the heat treatment temperature is 350°C, the holding time is 6h, and then cooled to room temperature with the furnace;

[0071] The extrusion die in the extruder is preheated to 120° C., the extrusion pressure is adjusted to 10 MPa, and the extrusion speed is controlled to 3 mm / s. The above-mentioned zinc alloy ingot was heated to 200° C. in an electric heating box for 3 hours. Put it into the mold, start the extruder, and extrude into a thick bar with a diameter of 12mm;

[0072] Pre-heat the swaging die in the swaging machine to 150°C, put the above-mentioned hot extruded thick bar and heat it to 280°C by electromagnetic induction to perform two passes of heating swaging. The frequency of electromagnetic induction heating is 500Hz, and the feeding speed of the material is 7mm / s. ...

Embodiment 2

[0081] Get the as-cast zinc alloy ingot (outside diameter 70mm * 300mm), peel off the outer skin with a lathe, and become an ingot with outside diameter φ 65mm. After homogenization heat treatment, the heat treatment temperature is 330 ° C, the holding time is 8 hours, and then cooled to room temperature with the furnace;

[0082] The extrusion die in the extruder was preheated to 150° C., and the extrusion pressure was adjusted to 15 MPa. The extrusion speed is controlled to be 2mm / s. Heat the above-mentioned zinc alloy ingot to 120° C. in an electric heating box for 2 hours. Put it into the mold, start the extruder, and extrude it into a thick bar of 20mm;

[0083] The swaging die in the swaging machine was heated to 180° C., and the above-mentioned hot-extruded bar was put into three passes of heating and swaging. The bar is heated to 220°C by electromagnetic induction. The electromagnetic induction heating frequency is 400Hz, and the feeding speed of the material is 4m...

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Abstract

The invention provides a preparation method of a medical biodegradable zinc alloy capillary wire material. A medical biodegradable zinc alloy is sequentially subjected to vacuum melting and homogenizing treatment to obtain a zinc alloy cast ingot, then the zinc alloy cast ingot is sequentially subjected to skin turning and extrusion, a zinc alloy coarse bar is obtained and sequentially subjected to rotary swaging and annealing, a fine bar is obtained, the surface of the obtained fine bar is coated with a graphite lubricant coating, then the fine bar is subjected to cold drawing for wire drawing, and the medical biodegradable zinc alloy capillary wire material is obtained, wherein the diameter of the capillary wire material is smaller than 0.1 mm. The preparation method is a compound machining method comprising vacuum melting, thermal extrusion forming, rotary swaging and cold drawing for wire drawing, the purposes of enhancing the material performance and plastification can be achieved through surface lubrication and proper thermal treatment of the special procedures, the microstructure grain fragmentation can reach the nanoscale, the comprehensive mechanical performance is excellent, the surface quality is good, and corrosion resistance, degradation uniformity and degradation speed all meet the clinical application requirements.

Description

technical field [0001] The invention relates to the technical field of preparation of new biological materials, in particular to a preparation method of medical biodegradable zinc alloy capillary wire. Background technique [0002] Traditional orthopedic trauma straps or cables are mostly braided with biologically inert metal wires with a certain metal strength, such as 316L stainless steel, titanium and titanium alloys. Once implanted in the human body, it cannot degrade by itself and needs to be removed through a second operation, which increases the pain and economic burden of the patient. At present, researchers have proposed a scheme that can use degradable polymers or magnesium alloy materials to prepare binding belts or binding cables. However, in actual operation, most degradable polymer materials or magnesium alloy materials have poor mechanical properties, large wire or cable diameters, and are prone to fracture failures during bundle fracture treatment, seriously...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B21C1/04B21C9/02C22F1/16
CPCB21C1/04B21C9/02B21C37/045B21C37/047C22F1/165
Inventor 周功耀屈功奇严心浩益明星
Owner XIAN ADVANCED MEDICAL TECH
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