A preparation method of ti2448 biomedical alloy with low Young's modulus

A Young's modulus, biomedical technology, applied in the field of biomedical alloy materials, achieves the effects of low elastic modulus, simple preparation process and broad application prospects

Active Publication Date: 2022-05-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the Young's modulus of the existing Ti2448 alloy is at least 43GPa, which is still slightly higher than that of human bone.

Method used

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  • A preparation method of ti2448 biomedical alloy with low Young's modulus
  • A preparation method of ti2448 biomedical alloy with low Young's modulus
  • A preparation method of ti2448 biomedical alloy with low Young's modulus

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: A kind of preparation method of Ti2448 biomedical alloy with low Young's modulus provided in this embodiment, the steps are as follows:

[0028] (1) Ingredients: Ti, Nb, Zr, and Sn with a purity of 99.99% are used as raw materials, according to mass percentage Ti: 64wt.%, Nb: 24wt.%, Zr: 4wt.%, Sn: 8wt. % ratio preparation;

[0029] (2) Melting: Preparation of ingot alloy: melt the metal element mixed in the step (1) in vacuum arc melting, in order to ensure the uniformity of alloy ingot composition, turn over 6-7 times during smelting.

[0030] (3) As-cast alloy test: Characterize the microstructure and compressive mechanical properties of the as-cast alloy. get attached figure 1 the result of.

[0031] (4) Rolling: First, the alloy is subjected to the second rolling process parameter, that is, the alloy is hot-rolled at 850°C. When hot-rolling, the alloy is firstly kept at 850°C for 30Min, and then hot-rolled. In order to prevent the alloy from cracki...

Embodiment 2

[0035] Embodiment 2: the preparation method of a kind of Ti2448 biomedical alloy with low Young's modulus provided by this embodiment, it is basically the same as embodiment 1, the difference is: in (4) step, carried out the first It is a rolling process, that is, the alloy is hot-rolled at 1000°C, and the deformation is about 85%. When hot-rolling, the alloy is first kept at 1000°C for 30 minutes, and then hot-rolled. All the alloys are returned to the furnace for 5-10 minutes. as attached Figure 4 shown.

Embodiment 3

[0036] Embodiment 3: the preparation method of a kind of Ti2448 biomedical alloy with low Young's modulus provided by this embodiment, it is basically the same as embodiment 1, the difference is: in (4) step, carried out the second It is a rolling process, that is, after hot rolling at 850°C, the deformation is 55%, and then it is cold rolled to ~1.5mm at room temperature. During hot rolling, the alloy is first kept at 850°C for 30Min, and then hot rolled. In order to prevent the alloy from cracking, After that, the alloy is returned to the furnace for 5-10 minutes before hot rolling for each pass, and then the alloy is cold-rolled for multiple passes, and the final plate thickness is 1.5mm. as attached Figure 4 shown.

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Abstract

The invention discloses a preparation method of Ti2448 biomedical alloy with low Young's modulus. The preparation process includes the following steps: mixing Ti, Nb, Zr and Sn simple substances according to the mass fraction, performing electric arc melting, and rolling the cast ingot by adopting three different rolling process parameters. In order to eliminate internal stress, the plate is subjected to solution treatment at 850°C and water quenched, and then the Young's modulus of the alloy is reduced by adding appropriate pre-strain. Compared with the prior art, the present invention successfully reduces the Young's modulus of the Ti2448 alloy to 33GPa and optimizes the comprehensive mechanical properties of the alloy through appropriate thermomechanical treatment parameters and adding appropriate pre-strain.

Description

technical field [0001] The invention relates to the technical field of biomedical alloy materials, in particular to a preparation method of Ti2448 biomedical alloy with low Young's modulus. Background technique [0002] Titanium alloys have become one of the most popular materials for biomedical applications due to their low density, high specific strength, excellent corrosion resistance, and good biocompatibility. A variety of α+β titanium alloys that are promising for orthopedic implants have been developed, including Ti-6Al-4V, Ti-6Al-7Nb, Ti-5Al-2.5Fe, etc. However, these titanium alloys may have a Young's modulus significantly higher than that of human bone (about 10-40GPa), which does not match the Young's modulus of human bone. After implantation, a "stress shielding" effect will occur, resulting in failure of body functions. Some alloys contain toxic elements such as Al and V, which will cause harm to human health. The development of new titanium alloys with low Yo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C14/00C22F1/18A61L27/06
CPCC22C1/02C22C14/00C22F1/183A61L27/06
Inventor 杨燕董自强张统一
Owner SHANGHAI UNIV
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