A kind of medical zinc-based alloy strip and its preparation method

An alloy strip and zinc-based technology, which is applied in the field of medical zinc-based alloy implant device material preparation, can solve the problems of poor comprehensive mechanical properties of as-cast pure zinc, reduce economic burden, improve strength and plasticity, and have poor plastic deformation ability. Effect

Active Publication Date: 2020-01-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem: The present invention provides a medical zinc-based alloy strip that solves the problem of poor comprehensive mechanical properties of as-cast pure zinc, realizes controllable degradation rate of implanted materials, improves material biocompatibility, and realizes miniaturized material size material and its preparation method

Method used

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  • A kind of medical zinc-based alloy strip and its preparation method
  • A kind of medical zinc-based alloy strip and its preparation method
  • A kind of medical zinc-based alloy strip and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0045] The medical zinc-based alloy strip of the present invention has the following parts by mass of raw materials: 0.2 parts of Mg, 0.05 parts of Li, 0.02 parts of Ca, 0.02 parts of Y, 99.71 parts of Zn and the rest being Zn.

[0046] The preparation steps of the zinc-based alloy strip are as follows:

[0047] step 1,

[0048] (1) take raw material according to above-mentioned alloy ratio;

[0049] (2) After preheating the iron crucible with a protective layer on the inner wall, put metal zinc in it, raise the temperature to 420°C and wait for the pure zinc to completely melt, then raise the temperature of the zinc melt to 620°C, in CO 2 and SF 6 Add metal magnesium, metal calcium, metal lithium, and metal yttrium under the protection of a mixed atmosphere, and stir evenly. After all the metals are melted, let it stand for a while to form an alloy melt, and cool down to 520°C;

[0050] (3) Adding 0.2% of hexachloroethane accounting for the total weight of the alloy melt i...

Embodiment 2

[0060] The medical zinc-based alloy strip of the present invention uses the following mass parts of raw materials: 0.3 parts for Mg, 0.1 parts for Li, 0.1 parts for Ca, 0.05 parts for Y, and 99.45 parts for Zn.

[0061] The preparation steps of the zinc-based alloy strip are as follows:

[0062] step 1,

[0063] (1) take raw material according to above-mentioned alloy ratio;

[0064] (2) After preheating the iron crucible with a protective layer on the inner wall, put metal zinc in it, raise the temperature to 420°C and wait for the pure zinc to completely melt, then raise the temperature of the zinc melt to 620°C, in CO 2 and SF 6 Add metal magnesium, metal calcium, metal lithium, and metal yttrium under the protection of a mixed atmosphere, stir evenly, wait for a period of time to form an alloy melt after all the metals are melted, cool down to 520°C, and cast to obtain an alloy ingot.

[0065] Step 2, Homogenization:

[0066] (1) heat the alloy ingot at 310°C for 24h; ...

Embodiment 3

[0074] The medical zinc-based alloy strip of the present invention has the following mass parts of raw materials: 3 parts of Mg, 1.5 parts of Li, 0.5 parts of Ca, 0.3 parts of Y, and 94.7 parts of Zn.

[0075] The preparation steps of the zinc-based alloy strip are as follows:

[0076] step 1,

[0077] (1) take raw material according to above-mentioned alloy ratio;

[0078] (2) After preheating the iron crucible with a protective layer on the inner wall, put metal zinc in it, raise the temperature to 450°C and wait for the pure zinc to completely melt, then raise the temperature of the zinc melt to 660°C, in CO 2 and SF 6 Add metal magnesium, metal calcium, metal lithium, and metal yttrium under the protection of a mixed atmosphere, and stir evenly. After all the metals are melted, let it stand for a while to form an alloy melt, and cool down to 560°C;

[0079] (3) Add 0.5% hexachloroethane accounting for the total weight of the alloy melt into the alloy melt according to t...

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Abstract

The invention discloses a medical zinc-based alloy strip and a preparation method thereof. The zinc-based alloy strip comprises the following components of, 0.2-3 wt.% of Mg, 0.05-1.5 wt.% of Li, 0.02-0.5wt.% of Ca, 0.02-0.3wt.% of Y, the balance Zn and a small amount of inevitable impurities (with the content less than 0.1 wt.%); an alloy cast ingot obtained by smelting is subjected to a series of combination of plastic deformation machining and annealing processes, an ultra-thin alloy strip can be prepared, meanwhile, alloy structure regulation and refinement are realized, so that the effectof remarkably improving the comprehensive mechanical property of the alloy strip is achieved. The medical zinc-based alloy strip has high strength and toughness (with tensile strength being 283-451 MPa and the elongation rate at breakage being 19-42%), good biocompatibility, a degradation rate (0.07-0.23 mm / year) suitable for being regulated and controlled and the like, and belongs to the fieldof preparation of medical zinc-based alloy implant instrument materials, and the application range of the zinc-based alloy on more medical indications and medical instruments is expected to be expanded.

Description

technical field [0001] The invention relates to a medical zinc-based alloy strip and its preparation technology, and belongs to the technical field of preparation of medical zinc-based alloy implanted device materials. Background technique [0002] At present, inert and non-degradable metal materials are mainly used for clinical implant medical metal materials, for example, (1) austenitic stainless steel 316LSS; (2) pure metals (titanium, niobium, zirconium, etc.); (3) titanium-based alloys; (4) ) cobalt-based alloy; (5) cobalt-chromium alloy; (6) nickel-chromium alloy; (7) nickel-titanium shape memory alloy. These biologically inert materials usually remain in human tissues as permanent fixtures in the body and can remain stable for a long time, but there are also various drawbacks. For example, (1) after the permanent metal medical device is implanted into the human body, it is easy to form thrombus, which may cause restenosis in the stent, insufficient intima fibrosis, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/06C22F1/16C22C18/00
CPCC22C1/02C22C1/06C22C18/00C22F1/165
Inventor 白晶曹瑞桦李杨薛烽周健
Owner SOUTHEAST UNIV
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