Biological iron-based alloy for promoting degradation by optimizing organization structure and preparation method thereof

A technology of microstructure and iron-based alloys, applied in the direction of tissue regeneration, additive manufacturing, additive processing, etc., can solve the problems of slow degradation of biological iron-based alloys, reduce corrosion resistance, improve degradation rate, and accelerate electron transfer. Effect

Active Publication Date: 2020-01-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of slow degradation of biological iron-based alloys in the prior art, the present invention proposes to prepare iron, manganese and silicon into a biodegradable iron-based alloy by using a selective laser melting process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The particle size of the silicon powder is 1-5 μm, the particle size of the manganese powder is 5-10 μm, and the particle size of the iron powder is 20-60 μm, and the silicon powder, the manganese powder and the iron powder are weighed according to the mass ratio of 10:20:70, and the silicon Powder and manganese powder were mixed and ball milled for 20 minutes at a speed of 100 rad / min, and then iron powder was added to continue ball milling for 30 minutes at a speed of 200 rad / min to obtain a uniformly dispersed mixed powder; using the above-mentioned uniformly dispersed mixed powder as raw material, selective laser melting For the process, the laser power is 100W, the laser spot diameter is 100μm, and the scanning speed is 130mm / s. The bio-iron-based alloy is obtained after melting and solidification under a protective atmosphere.

[0039] Implementation effect: The prepared biological iron-based alloy was tested, and it was found that silicon and manganese were evenly...

Embodiment 2

[0041] The particle size of the silicon powder is 1-5 μm, the particle size of the manganese powder is 5-10 μm, and the particle size of the iron powder is 20-60 μm, and the silicon powder, the manganese powder and the iron powder are weighed according to the mass ratio of 8:12:80, and the silicon Powder and manganese powder were mixed and ball milled for 20 minutes at a speed of 100 rad / min, and then iron powder was added to continue ball milling for 30 minutes at a speed of 200 rad / min to obtain a uniformly dispersed mixed powder; using the above-mentioned uniformly dispersed mixed powder as raw material, selective laser melting For the process, the laser power is 100W, the laser spot diameter is 100μm, and the scanning speed is 130mm / s. The bio-iron-based alloy is obtained after melting and solidification under a protective atmosphere.

[0042] Implementation effect: The prepared biological iron-based alloy was tested, and it was found that silicon and manganese were evenly ...

Embodiment 3

[0044] The particle size of the silicon powder is 1-5 μm, the particle size of the manganese powder is 5-10 μm, and the particle size of the iron powder is 20-60 μm, and the silicon powder, the manganese powder and the iron powder are weighed according to the mass ratio of 10:20:70, and the silicon Powder and manganese powder were mixed and ball milled for 20 minutes at a speed of 100 rad / min, and then iron powder was added to continue ball milling for 30 minutes at a speed of 200 rad / min to obtain a uniformly dispersed mixed powder; using the above-mentioned uniformly dispersed mixed powder as raw material, selective laser melting For the process, the laser power is 120W, the laser spot diameter is 100μm, and the scanning speed is 130mm / s. The iron-based implant is obtained after melting and solidification under a protective atmosphere.

[0045] Implementation effect: The prepared biological iron-based alloy was tested, and it was found that silicon and manganese were evenly d...

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Abstract

The invention discloses a biological iron-based alloy for promoting degradation by optimizing an organization structure and a preparation method thereof, and belongs to the technical field of biomedical implant design and manufacturing. The biological iron-based alloy contains iron, manganese and silicon. The preparation method of the biological iron-based alloy comprises the following steps thatsilicon powder, manganese powder and iron powder are subjected to ball milling and mixing in proportion in the protective atmosphere; then and the biological iron-based alloy is prepared through a selective laser melting process. The biological iron-based alloy has the advantages that the solid solubility of manganese and silicon in an iron base is improved through the laser rapid solidification process, the alpha-ferrite single phase in pure iron is promoted to be converted into an epsilon-martensitic phase, especially a gamma-austenite phase, the characteristics that when an epsilon-martensite is compared with the gamma-austenite, the alpha-ferrite phase is lower in corrosion resistance, and compared with the epsilon-martensitic phase, the gamma-austenite is lower in electrical resistivity, the degradation rate of the biological iron-based alloy is increased. By means of the method for optimizing the microstructural structure of the iron base, the problem that the biological iron-based alloy is too slow in degradation is solved, and application of the iron-based alloy in bone repairing is promoted.

Description

technical field [0001] The invention relates to a biological iron-based alloy which optimizes tissue structure and accelerates degradation and a preparation method thereof; it belongs to the technical field of biomedical implant design and manufacture. Background technique [0002] Metal materials are widely used in orthopedics and other hard tissue repairs, but most metal implant materials are permanent and require secondary surgery to remove, which not only increases medical costs, but also brings unnecessary pain to patients. If orthopedic repair materials can be completely degraded in a biological environment after a certain period of time, surgical removal can be avoided. Therefore, biodegradable metal materials have received more and more attention in recent years. Iron-based alloys have been widely used as implant materials in load-bearing fields such as artificial prostheses and artificial joints due to their excellent mechanical properties, processability, and good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C33/02B22F3/105B33Y70/00B33Y10/00A61L27/04A61L27/58
CPCC22C38/04C22C38/02C22C33/0278B33Y70/00B33Y10/00A61L27/042A61L27/58A61L2430/02B22F10/00B22F10/36B22F10/32B22F10/28Y02P10/25
Inventor 帅词俊高成德
Owner CENT SOUTH UNIV
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