Elastic medical beta titanium alloy powder suitable for 3D printing and preparation method and application thereof

A beta titanium alloy, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of low plasticity of titanium alloy 3D printing parts, decreased mechanical properties of the alloy, low oxygen absorption efficiency, etc., and achieves easy mass production, uniform composition, Beneficial for homogenization

Active Publication Date: 2021-12-03
HUNAN HENGJI POWDER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN106148760 B specifically describes a Ti for 3D printing 25 NbTa 1 Zr x R alloy powder is used in the medical field, but only its strength and elastic modulus are described, and the plasticity and shape memory effect are not described, which cannot solve the problem of low plasticity and difficulty in achieving superelasticity of titanium alloy 3D printed parts.
However, it can be found that although the patent has added rare earth elements to avoid the influence of impurities, the alloy provided by the patent still con

Method used

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  • Elastic medical beta titanium alloy powder suitable for 3D printing and preparation method and application thereof
  • Elastic medical beta titanium alloy powder suitable for 3D printing and preparation method and application thereof
  • Elastic medical beta titanium alloy powder suitable for 3D printing and preparation method and application thereof

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Embodiment 1

[0039] The superelastic β-type titanium alloy is prepared by smelting method. The specific process: choose titanium, yttrium silicide, and niobium as raw materials, and the powder mass ratio Ti:YSi 2 :Nb=74:1:25, and put them into the medium frequency induction melting furnace in sequence, and vacuumize to 6×10 -2 Pa, then filled with inert gas Ar, the inert gas pressure is 2×10 -1 Pa protection smelting, the smelting current is 80A, and the smelting time is 30min; after the material is completely melted and cleared, it is evacuated and refined. After refining, the alloy melt is cast into a mold to obtain a metal casting rod with a diameter of 60mm and a length of 50cm. Electrode Consumable electrode for inductive aerosolization. The prepared titanium alloy master alloy rod is used as a consumable electrode, the furnace body is closed, the vacuum is evacuated to 0.01Pa, the electrode melting power is 31.3kW, the frequency is 200kHZ, and the rod descending rate is about 41mm / m...

Embodiment 2

[0044] The superelastic β-type titanium alloy is prepared by smelting method. The specific process: choose titanium, yttrium silicide, and niobium as raw materials, and the powder mass ratio Ti:YSi 2 :Nb=76:1:23, and put them into the medium frequency induction melting furnace in sequence, and vacuumize to 6×10 -2 Pa, then filled with inert gas Ar, the inert gas pressure is 2×10 -1 Pa protection smelting, the smelting current is 80A, and the smelting time is 30min; after the material is completely melted and cleared, it is evacuated and refined. After refining, the alloy melt is cast into a mold to obtain a metal casting rod with a diameter of 60mm and a length of 50cm. Electrode Consumable electrode for inductive aerosolization. The prepared titanium alloy master alloy rod is used as a consumable electrode, the furnace body is closed, the vacuum is evacuated to 0.01Pa, the electrode melting power is 31.8kW, the frequency is 200kHZ, and the rod descending rate is about 40.4mm...

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Abstract

The invention provides medical beta titanium alloy powder suitable for 3D printing and a preparation method and application thereof. The elastic medical beta titanium alloy powder is composed of, by mass, 18-30% of Nb, 0.2-1.5% of ReSi2 and the balance Ti, and ReSi2 is selected from one of YSi2, LaSi2, NdSi2 and ErSi2; and the powder is prepared by an electrode induction melting gas atomization method (EIGA), that is, alloy is smelted by a medium-frequency induction furnace and cast into a mold to obtain a consumable electrode, and then powder is prepared by argon atomization. The particle size of the powder is-300-1000 meshes, and the yield of qualified powder is not lower than 50%. The rare earth is adopted to capture free oxygen in the alloy, the plasticity and the superelasticity are improved, the alloy has an excellent shape memory effect, when the tensile pre-strain is less than 5%, the recoverable strain rate after unloading exceeds 90%, and a finished product prepared by the method can meet the requirements of medical materials such as stents and dental or orthopedic joints.

Description

technical field [0001] The invention belongs to a method in the technical field of preparing titanium alloy powder, and mainly relates to an elastic medical β-titanium alloy powder suitable for 3D printing and its preparation method and application. Background technique [0002] The density of titanium alloy is only 50-60% of that of traditional stainless steel, its strength is not lower than or even better than stainless steel, and it also has better corrosion resistance and biocompatibility. At present, it has gradually replaced stainless steel, cobalt chromium and other Materials play a huge role in the field of biomedicine. Among all kinds of titanium alloys, Ti-Nb-based alloys not only have the low elastic modulus of ordinary β titanium alloys, but also have better biocompatibility and corrosion resistance, and also have phase transition superelasticity (or shape memory effect). . This type of alloy will deform under the action of external force, but after heating to ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/08B33Y70/00C22C14/00
CPCB22F9/082C22C14/00B33Y70/00Y02P10/25
Inventor 娄嘉何浩唐鑫东吴楚寻裕平
Owner HUNAN HENGJI POWDER TECH
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