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A kind of biomedical tinb base titanium alloy and preparation method thereof

A biomedical, base titanium alloy technology, applied in the field of biomedical titanium alloys, can solve the problems of easy oxidation of titanium alloys, increase preparation costs, element segregation, etc., achieve important theoretical significance and engineering value, reduce preparation costs, and reduce smelting. effect of difficulty

Active Publication Date: 2022-04-12
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain deficiencies in the large-scale commercial preparation of the above alloys.
This type contains more β-stable elements (Ta, Mo, etc.) and / or neutral elements (Zr, Hf, Sn, etc.), which makes these alloys contain complex alloy compositions, and impurities are easily introduced during the preparation process, resulting in Phenomena such as element segregation have an impact on the properties of the alloy. In addition, the alloy contains more high-melting point components, which increases the preparation cost.
In addition, the above alloys regard oxygen as a harmful impurity element, while titanium alloys are easily oxidized during the preparation process

Method used

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  • A kind of biomedical tinb base titanium alloy and preparation method thereof
  • A kind of biomedical tinb base titanium alloy and preparation method thereof
  • A kind of biomedical tinb base titanium alloy and preparation method thereof

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preparation example Construction

[0025] A preparation method of biomedical TiNb-based titanium alloy, comprising the following steps:

[0026] S1: According to the composition ratio of 31-39wt% Nb, 0.4-0.8wt% O, and the balance being Ti, the ingot or alloy ingot of each metal element of the titanium alloy is mixed with TiO 2 Powder, ultrasonically cleaned and pickled to remove surface impurities, and then smelted in a vacuum non-consumable electric arc furnace to prepare titanium alloy ingots;

[0027] S2: Homogenize the titanium alloy ingot prepared in step S1 at 1000-1100° C. for more than 2 hours, and then perform hot forging and rolling at 650-750° C. to obtain a titanium alloy plate or bar;

[0028] S3: The titanium alloy plate or rod obtained in step S2 is subjected to solution treatment at (500-600)+650[O]°C, protected by an argon atmosphere, and water-cooled to obtain the final titanium alloy, wherein [O] is oxygen mass percent.

[0029] Through a method for preparing a biomedical TiNb-based titaniu...

Embodiment 1

[0033] Embodiment 1: Preparation of Ti-38Nb-0.6O alloy

[0034] (1) Prepare high-purity Ti ingot, Nb ingot, TiO 2 Powder raw materials, and according to the composition ratio of 38wt% Nb, 0.6wt% O, and the balance of Ti, the raw materials are subjected to steps such as ultrasonic cleaning and pickling to remove surface impurities. The raw materials are melted in a vacuum non-consumable electric arc furnace, and melted into TiNbO ingots;

[0035] (2) The above-mentioned TiNbO ingot was homogenized at 1100°C for 2 hours, and then hot forged at 750°C to obtain an alloy plate.

[0036] (3) The above-mentioned alloy plate is subjected to solution treatment at 900° C. and cooled with water.

[0037] The Ti-38Nb-0.6O alloy prepared in this implementation is a single β phase, such as figure 1 Shown in the XRD pattern of. Pass the tensile test ( image 3 ), the modulus of elasticity of the titanium alloy is 52GPa, the tensile strength is 1210MPa, and the elongation is 22%.

Embodiment 2

[0038] Embodiment 2: Preparation of Ti-36Nb-0.5O alloy

[0039] (1) Prepare high-purity Ti ingot, Nb ingot, TiO 2Powder raw materials, and according to the ratio of 36wt% Nb, 0.5wt% O, and the balance of Ti, ultrasonic cleaning, pickling and other steps are carried out to remove surface impurities. The raw materials are put into a vacuum non-consumable electric arc furnace for smelting, and smelted into TiNbO ingots.

[0040] (2) Homogenize the above ingot at 1100°C for 2 hours, and then perform hot forging at 750°C to obtain an alloy plate;

[0041] (3) The above-mentioned alloy plate is subjected to solution treatment at 830° C. and cooled with water.

[0042] The structure of the Ti-36Nb-0.5O alloy prepared in this implementation is α+β two phases, wherein the α phase is spherical and the content is 10%. Pass the tensile test ( image 3 ), the modulus of elasticity of the titanium alloy is 60GPa, the tensile strength is 1160MPa, and the elongation is 16%.

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Abstract

This invention discloses a biomedical titanium alloy and a preparation method thereof. The titanium alloy contains three elements of Ti, Nb and O, and the composition includes 31-39wt% Nb, 0.4-0.8wt% O and the balance of Ti and other components. Inevitable impurities; through heat treatment, the content of α-phase in the alloy structure is finally controlled to be no more than 15%, and the Nb content of β-phase is 38-40%; the elastic modulus of the alloy is 50-65GPa, and the tensile strength is above 900MPa. The low-modulus and high-strength titanium alloy of the invention has high oxygen content, can reduce the cost of deoxygenation in the smelting preparation process, has excellent mechanical properties, and has important theoretical significance and engineering value.

Description

technical field [0001] The invention belongs to the technical field of biomedical titanium alloys, in particular to a low-cost low-modulus high-strength medical oxygen-containing titanium alloy and a preparation method thereof. Background technique [0002] Biomedical materials are advanced multifunctional materials that can be used for diagnosis, treatment or replacement of human tissues and organs or to enhance their functions. With the continuous development of the economy and the continuous advancement of modern medical technology, the aging of the social population is becoming more and more serious, and the performance requirements for biomedical materials are also increasing. Titanium alloys are widely used in the biomedical field due to their excellent properties such as low density, high specific strength, good biological and mechanical compatibility, and corrosion resistance. [0003] Low modulus and high strength are the key mechanical properties to ensure the lon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18
CPCC22C14/00C22C1/02C22F1/183
Inventor 肖文龙王俊帅马朝利付雨
Owner BEIHANG UNIV
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