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Ultrafine grain biodegradable zinc alloy as well as preparation method and application thereof

A technology of ultra-fine grain and zinc alloy, applied in the field of alloy materials, can solve the problems of less slip system, low mechanical strength and toughness, easy formation of fiber texture or plate texture, etc., and achieve improved mechanical strength and toughness, high mechanical strength The effect of toughness and low energy consumption

Pending Publication Date: 2022-07-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a revolutionary biodegradable metal, zinc has brought a new development direction for medical implants, but zinc also has some disadvantages, such as containing coarse columnar crystals or dendrites, and its close-packed hexagonal crystal structure makes slippery Few transfer systems, the base surface slips mainly at room temperature, easy to form fiber texture or plate texture, low mechanical strength and toughness

Method used

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  • Ultrafine grain biodegradable zinc alloy as well as preparation method and application thereof
  • Ultrafine grain biodegradable zinc alloy as well as preparation method and application thereof
  • Ultrafine grain biodegradable zinc alloy as well as preparation method and application thereof

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preparation example Construction

[0030] The invention provides a preparation method of an ultrafine-grained biodegradable zinc alloy, comprising the following steps:

[0031] Heating zinc to melting to obtain zinc liquid;

[0032] Adding aluminum or magnesium to the zinc liquid, smelting to obtain an alloy liquid;

[0033] The alloy liquid is poured to obtain an as-cast billet;

[0034] The as-cast billet is subjected to homogenization heat treatment to obtain a plate;

[0035] The sheet is hot rolled to obtain an ultrafine grain biodegradable zinc alloy.

[0036] In the present invention, zinc is heated to melt to obtain zinc liquid. In the present invention, the melting temperature is preferably 650°C.

[0037] After the zinc liquid is obtained, in the present invention, aluminum or magnesium is added to the zinc liquid and smelted to obtain an alloy liquid. In the present invention, when aluminum is added to the zinc solution, the content of aluminum in the alloy solution is preferably 0.5-1.5wt%, mor...

Embodiment 1

[0052] Using metal zinc and metal aluminum as raw materials, according to the ratio of 99.0wt% Zn and 1.0wt% Al, first put metal zinc into a resistance furnace at 650 ℃, after it is melted, add 1.0wt% Al, After all the metal is melted, stir until the mixture is uniform, keep it at rest for 15 minutes, vibrate with an ultrasonic vibrator for 5 minutes, and pour it into a graphite crucible preheated to 200 ° C in advance to obtain a cylindrical cast with a diameter of 40 mm and a length of 180 mm. blank;

[0053] The as-cast billet is subjected to homogenization heat treatment, and the heat treatment process is as follows: heating up to 300° C. with the furnace and keeping the temperature for 3 hours, air-cooling to room temperature, and then cutting the heat-treated billet into a 60mm×20mm×3mm plate;

[0054] Put the plate into a resistance furnace and heat it to 200°C with the furnace, then put it into a four-roll mill for hot rolling, set a single pass reduction of 0.5mm, and...

Embodiment 2

[0058] Using metal zinc and Zn-50wt% Mg as raw materials, according to the ratio of 99.9wt% Zn and 0.1wt% Mg, first put metal zinc into a resistance furnace at 650 ℃, after it is melted, add 0.1wt% After all the metal is melted, stir until the mixture is uniform, keep it at rest for 15 minutes, vibrate with an ultrasonic vibrator for 5 minutes and pour it into a graphite crucible preheated to 200 ° C in advance to obtain a cylinder with a diameter of 40 mm and a length of 180 mm. as-cast billet;

[0059] The as-cast billet is subjected to homogenization heat treatment, and the heat treatment process is as follows: heating up to 300° C. with the furnace and keeping the temperature for 3 hours, air-cooling to room temperature, and then cutting the heat-treated billet into a 60mm×20mm×3mm plate;

[0060] Put the plate into a resistance furnace and heat it to 200°C with the furnace, then put it into a four-roll mill for hot rolling, set a single pass reduction of 0.5mm, and put it...

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Abstract

The invention provides an ultra-fine grain biodegradable zinc alloy and a preparation method and application thereof, and relates to the technical field of alloy materials. The preparation method of the ultra-fine grain biodegradable zinc alloy comprises the following steps that zinc is heated to be molten, and zinc liquid is obtained; adding aluminum or magnesium into the zinc liquid, and smelting to obtain alloy liquid; the alloy liquid is poured, and an as-cast blank is obtained; the as-cast blank is subjected to homogenizing heat treatment, and a plate is obtained; and the plate is subjected to hot rolling, and the ultra-fine grain biodegradable zinc alloy is obtained. According to the method, the grains of the zinc alloy are refined to be micron-sized through alloying and hot rolling, so that the organization structure of the zinc alloy is optimized, and the mechanical obdurability of the alloy is greatly improved by utilizing a fine grain strengthening mechanism.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to an ultrafine-grained biodegradable zinc alloy and a preparation method and application thereof. Background technique [0002] Biodegradable materials are the current hot spot in the field of biomaterials. Compared with traditional permanent biomaterials, biodegradable materials can be used as bone fixators or cardiovascular stents. It is gradually degraded and eventually absorbed or excreted by the body. At present, biodegradable materials mainly include high molecular polymers, iron-based alloys, magnesium-based alloys, and zinc-based alloys. The application of high molecular polymers is limited due to their poor mechanical properties (strength less than 100MPa, elongation less than 5%); iron alloys can be completely degraded for more than five years, and the degradation products can cause inflammation; magnesium-based alloys in vivo 120 It can be completely degraded w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/00C22C18/04C22F1/16C22C1/02
CPCC22C18/04C22C18/00C22C1/02C22F1/165
Inventor 刘峙麟黄甜
Owner CENT SOUTH UNIV
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