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A kind of preparation method of medical titanium-niobium alloy product

A technology of titanium-niobium alloy and products, which is applied in the field of preparation of medical titanium-niobium alloy products, can solve the problems of high cost and reduce the cost of product preparation, and achieve the effect of reducing the cost of raw materials and avoiding deformation or even cracking

Active Publication Date: 2020-06-09
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantage of high cost in the alloy manufacturing process of the selective laser melting forming method in the prior art, the present invention proposes a brand-new preparation method of medical titanium-niobium alloy products, which selects pure element powders with lower cost instead of alloying Powder is used as raw material, and titanium-niobium alloy products are directly manufactured by selective laser melting method, which can significantly reduce the preparation cost of products while ensuring its manufacturing flexibility and customization effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Select pure titanium powder with a particle size of 10-45 μm and pure niobium powder with a particle size of 0.1-20 μm at a mass ratio of 9:1, mechanically mix them in a glove box protected by high-purity argon (99.999%), and then load them into a material tank Among them, the maximum particle size of pure niobium powder is 44.4% of the maximum particle size of pure titanium powder; then it is transferred to the selective laser melting equipment under the protection of high-purity argon for printing and molding, the laser power is 100W, and the laser scanning speed 30cm / s, powder coating thickness 0.003cm, laser scanning distance 0.01cm, P / (ν·t·ω) 111.1kJ / cm 3 ; The product is dense during the printing process, without deformation or cracking; after heat treatment at 950°C for 0.5 hours, water cooling to room temperature, and finally polishing.

Embodiment 2

[0039]Select pure titanium powder with a particle size of 10-53 μm and pure niobium powder with a particle size of 0.1-30 μm at a mass ratio of 7:3, mechanically mix them in a glove box protected by high-purity argon (99.999%), and then load them into the material tank Among them, the maximum particle size of pure niobium powder is 56.6% of the maximum particle size of pure titanium powder; then transferred to the selective laser melting equipment under the protection of high-purity argon for printing and molding, the laser power is 300W, and the laser scanning speed 90cm / s, powder coating thickness 0.004cm, laser scanning distance 0.012cm, P / (ν·t·ω) 69.4kJ / cm 3 ; During the printing process, the product is dense without deformation or cracking; after the printed sample is heat-treated at 900°C for 1 hour, it is water-cooled to room temperature and finally polished.

Embodiment 3

[0041] Select pure titanium powder with a particle size of 15-53 μm and pure niobium powder with a particle size of 10-30 μm in a mass ratio of 3:2, mechanically mix them in a glove box protected by high-purity argon (99.999%), and then put them into the material tank Among them, the maximum particle size of pure niobium powder is 56.6% of the maximum particle size of pure titanium powder; then transferred to the selective laser melting equipment under the protection of high-purity argon for printing and molding, the laser power is 900W, and the laser scanning speed 150cm / s, powder coating thickness 0.005cm, laser scanning distance 0.019cm, P / (ν·t·ω) 63.2kJ / cm 3 ; During the printing process, the product is dense, without deformation or cracking; after the printed sample is heat-treated at 850°C for 1 hour, it is water-cooled to room temperature, and finally polished.

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Abstract

The invention discloses a preparation method of a medical titanium niobium alloy product. The preparation method of the medical titanium niobium alloy product comprises the following steps that (a) pure titanium powder and pure niobium powder are mixed according to the stoichiometric ratio of a titanium niobium alloy, wherein the particle diameter of the pure titanium powder is not more than 53 [mu]m, and the particle diameter of the pure niobium powder is not more than 30 [mu]m; and (b) according to three-dimensional STL data of the product, printing and forming are carried out by a selectivelaser melting forming method to prepare the medical titanium niobium alloy product. The preparation method of the medical titanium niobium alloy product has the following advantages that the pure metal powder is used for preparing the alloy instead of alloying powder, and metallurgical processes such as prefabricated alloy ingots and atomized powder preparation are avoided, so that the raw material cost and the total manufacturing cost of products are obviously reduced. Customization of the personalized medical product can be realized, and meanwhile porous bone-induced scaffold prosthesis with a hollow structure (or a lattice structure) can be manufactured according to bionic design, and the defect of a traditional preparation method in manufacturing customized complex products is overcome.

Description

technical field [0001] The invention relates to a method for preparing a medical titanium-niobium alloy product, belonging to the technical field of medical material preparation. Background technique [0002] In medical repair products, titanium alloy is a high-quality material that can take into account the comprehensive properties of material strength, toughness and biocompatibility. It is often used in the repair of bearing bone tissue. The use of Ti-6Al-4V alloy has experienced half centuries. However, it is well known that Al and V elements have potential toxicity risks. In recent years, a series of new alloys with better biocompatibility (such as Ta, Nb, Zr, etc.) replacing Al and V have been designed and developed. Among them, alloys containing Nb have a lower modulus, which can effectively alleviate the stress shielding effect that traditional titanium alloy products tend to produce during bone repair, and are especially suitable for the development and application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F1/00B22F3/24C22C1/04C22C14/00
Inventor 林锦新吴松全罗佳斯林俊杰黄婷婷赵超前郭塞卢衍锦杨洋李斌林智杰
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI