A kind of biomedical mg-sn-zn alloy and rolling method thereof

Abstract

The invention discloses a biological medical Mg-Sn-Zn alloy and a rolling method thereof. The method comprises the following steps: keeping a Mg-Sn-Zn alloy ingot blank at the temperature of 300-350 DEG C for more than 12 minutes, carrying out single-pass 15-20% hot rolling pre-deformation at 300-350 DEG C, continuing single-pass 80-95% high reduction rolling formation at 300-350 DEG C, cooling with water to room temperature, and carrying out aging treatment on the water-cooled alloy plate blank at 150-200 DEG C for 4-10 hours, and finally, carrying out water quenching, wherein the holding time increases as the size of the plate blank increases. The invention also discloses a casting method of the Mg-Sn-Zn alloy ingot blank. The biological medical Mg-Sn-Zn alloy can be automatically degraded, has favorable carrying capacity and biocompatibility, can be widely used for preparing implantation materials in the human body, and has wide application prospects in biological medical material processes.

Description

technical field [0001] The invention relates to the field of biological materials, in particular to a biomedical Mg-Sn-Zn alloy and a rolling method thereof. Background technique [0002] With the development of medicine and material science, people hope that the materials implanted in the body will only play a temporary role in replacing them, and gradually degrade and absorb with the regeneration of tissues or organs, so as to minimize the long-term impact of implanted materials on the body. Because biodegradable materials are easy to decompose in the living body, and their decomposition products can be metabolized and finally excreted from the body, they have attracted more and more attention from the people. [0003] At present, most biodegradable biomedical materials are polylactic acid (PLA), polyglycolic acid (PGA) and other polymer materials, but these polymer materials have low mechanical properties, and the degradation products are easy to cause inflammation and sw...

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Problems solved by technology

[0003] At present, most biodegradable biomedical materials are polylactic acid (PLA), polyglycolic acid (PGA) and other polymer materials, but these polymer materials have low mechanical properties, and the degradation products are easy to cause inflammation and swelling, and the processing is difficult, which is not ideal. biodegradable biomedical materials

It is a new type of biomedical alloy. Compared with polymer materials, it has better load-bearing capacity and good biocompatibility. Compared with traditional metal hard tissue implant materials, magnesium alloy materials have biodegradable properties. Absorption performance, no need for secondary surgery to remove the implant material; although the biocompatibility of biodegradable biomedical magnesium alloy is better, it also has its shortcomings, compared with metal materials such as titanium alloy and cobalt-chromium alloy , the mechanical properties of magnesium alloys in the prior art are slightly low, and the corrosion rate is too fast. During use, the biological implant material will fail due to insufficient bearing capacity and too fast degradation rate, thus affecting the application of magnesium alloy biomaterials in clinical medicine. field application

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