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.