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A low-alloyed high-strength, easy-to-braid, degradable medical zinc alloy wire and its preparation method

A zinc alloy and low-alloy technology, applied in the field of low-alloyed, high-strength, easy-to-braid, degradable medical zinc alloy wire and its preparation, can solve the problem of poor mechanical properties of zinc-based alloys and less research on the machinability of zinc alloys. Limit the application potential of degradable metals, etc., to achieve the effects of excellent toughness, high strength, and excellent plasticity

Active Publication Date: 2021-04-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current research on zinc alloys is still in its infancy, especially on the regulation of the mechanical properties of zinc alloys and the machinability of zinc alloys.
As metals with a hexagonal structure, the mechanical properties of Zn-based alloys are relatively poor, which limits their application potential as degradable metals

Method used

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  • A low-alloyed high-strength, easy-to-braid, degradable medical zinc alloy wire and its preparation method
  • A low-alloyed high-strength, easy-to-braid, degradable medical zinc alloy wire and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The pure zinc ingots, pure magnesium ingots and magnesium-yttrium master alloys required for the Zn-0.2wt%Mg-0.2wt%Y alloy were placed in CO 2 and SF 6 Melting was carried out under the protection of a mixed atmosphere (99:1), followed by controlled solidification at a cooling rate of 100°C / s to obtain a zinc alloy ingot; a rectangular parallelepiped billet was cut from the above zinc alloy ingot, and 12 passes were carried out at 80°C. Die and other channel angle extrusion processing to obtain zinc alloy with ultra-fine and uniform structure; followed by one hot extrusion process at 150°C with an extrusion ratio of 9 to obtain zinc alloy rods with a diameter of 3mm; zinc alloy rods were processed Drawing process at room temperature, the single-pass deformation is 25%, when the cumulative drawing deformation exceeds 300%, anneal at 200°C for 10 minutes; after drawing a wire with a diameter of 0.3mm, anneal at 180°C for 15 minutes to obtain High-strength and easy-to-bra...

Embodiment 2

[0028] In CO 2 and SF 6 Melting was carried out under the protection of a mixed atmosphere (99:1), followed by controlled solidification at a cooling rate of 300°C / s to obtain a zinc alloy ingot; a rectangular parallelepiped billet was cut from the above zinc alloy ingot, and 20 passes were carried out at 120°C. Die and other channel angle extrusion processing to obtain zinc alloy with ultra-fine and uniform structure; followed by one hot extrusion process at 150°C with an extrusion ratio of 25 to obtain zinc alloy rods with a diameter of 1 mm; zinc alloy rods were processed Drawing process at room temperature, the single-pass deformation is 15%, when the cumulative drawing deformation exceeds 300%, anneal at 200°C for 10 minutes; after drawing a wire with a diameter of 0.1mm, anneal at 180°C for 15 minutes to obtain High-strength and easy-to-braid biodegradable medical zinc alloy wire.

Embodiment 3

[0030] In CO 2 and SF 6 Melting was carried out under the protection of a mixed atmosphere (99:1), followed by controlled solidification at a cooling rate of 180°C / s to obtain a zinc alloy ingot; a rectangular parallelepiped billet was cut from the above zinc alloy ingot, and 16 passes were carried out at 100°C. Die and other channel angle extrusion processing to obtain zinc alloy with ultra-fine and uniform structure; followed by one hot extrusion process at 150°C with an extrusion ratio of 16 to obtain zinc alloy rods with a diameter of 2mm; for zinc alloy rods The room temperature drawing process is carried out, and the single-pass deformation is 20%. When the cumulative drawing deformation exceeds 300%, it is annealed at 200°C for 10 minutes; after drawing a wire with a diameter of 0.2mm, it is annealed at 180°C for 15 minutes. Obtain high-strength and easy-to-braid biodegradable medical zinc alloy wire.

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Abstract

The invention discloses a low-alloyed, high-strength, easy-to-braid, degradable medical zinc alloy wire and a preparation method thereof. The method comprises the following steps: A. 2 and SF 6 Smelting under the protection of a mixed atmosphere, controlling the solidification speed to obtain zinc alloy ingots; B. Cutting cuboid or cylindrical billets from zinc alloy ingots, and performing multi-pass rotary die and other channel corner extrusion processing to obtain ultra-fine and uniform structures Zinc alloy; and processed into rods by one hot extrusion; C. Drawing process on zinc alloy rods at room temperature to obtain high-strength, tough and easy-to-braid biodegradable medical zinc alloy wires with a diameter of 0.1-0.3 mm. The invention obtains a three-phase eutectic structure reinforcement phase in a zinc alloy with low alloy element content by controlling a specific cooling rate, and then uses multi-pass equal-channel angular extrusion processing to promote uniform refinement of the alloy structure, improve machinability, and reuse Zinc alloy wire is obtained by drawing at room temperature, which significantly improves the strength and toughness of the wire and is easy to weave.

Description

technical field [0001] The invention belongs to the technical field of zinc alloy processing, and in particular relates to a low-alloyed high-strength and easy-to-braid degradable medical zinc alloy wire and a preparation method thereof. Background technique [0002] Degradable medical metal materials have received extensive attention in the past ten years. Compared with traditional inert medical metal materials (such as titanium alloys, iron-based alloys, nickel-based alloys, etc.) and degradable medical polymer materials (aliphatic polyester, cellulose, polylactic acid, etc.), degradable metals simultaneously integrate The advantages of the two types of materials, it not only has excellent mechanical properties, can play the necessary bearing role, but also has good biocompatibility and biodegradability, can be completely degraded after serving in the body for a period of time, avoiding the secondary surgery. [0003] Iron-based and magnesium-based alloys are two types o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C18/00B21C37/04C22F1/16
CPCB21C37/04C22C1/03C22C18/00C22F1/165
Inventor 刘欢孙超黄河任康轩江静华马爱斌
Owner HOHAI UNIV