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Metastable beta type Ti-Nb-Ta-Zr-O alloy and preparation method thereof

A ti-nb-ta-zr-o, alloy technology, applied in the field of medical devices, can solve the problems of low tensile strength, application limitation, low elastic modulus, etc., and achieves low work hardening rate, good processing performance, cold working good performance

Inactive Publication Date: 2008-07-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with Ti-6Al-4V alloy, Ti-35Nb-5Ta-7Zr alloy has a lower elastic modulus (55GPa) and excellent biocompatibility, but its tensile strength is very low, only 590MPa, Therefore, the application of Ti-35Nb-5Ta-7Zr alloy in the medical field has been limited.
Secondly, the superelasticity of these β-type titanium alloys is generally obtained through the pseudoelasticity produced by the stress-induced martensitic transformation, not the real elastic deformation, so the service temperature of the alloy is strongly limited to the martensitic transformation of the alloy and the martensitic inversion temperature

Method used

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  • Metastable beta type Ti-Nb-Ta-Zr-O alloy and preparation method thereof
  • Metastable beta type Ti-Nb-Ta-Zr-O alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] The alloy is prepared from sponge titanium, titanium-niobium master alloy, zirconium block and titanium dioxide. The design masses of each component are: titanium (Ti) 11.5 kg, niobium (Nb) 7.7 kg, zirconium (Zr) White powder (TiO 2 ) 0.8 kg. After the raw materials are pressed into electrodes, they are smelted in a vacuum consumable electric arc furnace; alloy ingots are cast in Hot rolling forming with a deformation amount of 60%, and then After 0.5h vacuum solution treatment, brine cooling, and finally cold rolling at room temperature with a deformation amount of 90% to form a plate to produce the alloy of the present invention. The measured tensile properties at room temperature are: R m =890MPa,R p0.2 =1230Mpa,A e =1.8%, A=13%, E=48Gpa.

Embodiment 2

[0030] The alloy is prepared from sponge titanium, titanium-niobium master alloy, zirconium block and titanium dioxide. The design masses of each component are: titanium (Ti) 11.5 kg, niobium (Nb) 7.7 kg, zirconium (Zr) White powder (TiO 2 )0.2 kg. After the raw materials are pressed into electrodes, they are smelted in a vacuum consumable electric arc furnace; alloy ingots are cast in Hot rolled forming with a deformation of 90%, and then After 1 hour of vacuum solution treatment, water cooling, and finally cold rolling at room temperature with a deformation of 50% into a plate, the alloy of the present invention is produced. The measured tensile properties at room temperature are: R m =830MPa,R p0.2 =1130Mpa,A e =1.9%, A=16%, E=45Gpa.

Embodiment 3

[0032] The alloy is prepared from sponge titanium, titanium-niobium master alloy, tantalum-zirconium master alloy, zirconium block and titanium dioxide. The design masses of each component are: titanium (Ti) 11.5 kg, niobium (Nb) 7.2 kg, tantalum (Ta ) 0.4 kg, zirconium (Zr) 0.6 kg, titanium dioxide (TiO 2 )0.3 kg. After the raw materials are pressed into electrodes, they are smelted in a vacuum consumable electric arc furnace; alloy ingots are cast in hot drawing with a deformation of 75%, and then After 1 hour of vacuum solution treatment, water cooling is carried out, and finally cold drawing with a deformation amount of 70% is carried out at room temperature to produce the alloy of the present invention. The measured tensile properties at room temperature are: R m =850MPa,R p0.2 =1150Mpa,A e =2.2%, A=17%, E=43Gpa.

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Abstract

The invention relates to a metastable beta-type Ti- Nb-Ta-Zr-O alloy and a method for preparation, wherein the components of the alloy are that Nb is 35-38 percent by weight, Ta is 0-3 percent by weight, Zr is 2-4 percent by weight, O is 0.2-0.8 percent by weight, and the other content is Ti. The method comprises V1ing, the Ti- Nb-Ta-Zr-O alloy whose components are uniform is obtained through the vacuum consumable electrode arc furnace melting method. V2ing, Ti- Nb-Ta-Zr-O alloy ingots are done by heat processing treatment in the temperature range of 800-100 DEG C. V3ing, after being done by the solid solution quenching treatment, the Ti- Nb-Ta-Zr-O alloy which is treated in the temperature range of 1000-1200 DEG C is cooled, thereby obtaining a single-phase beta tissue. V4ing, solid solution state Ti- Nb-Ta-Zr-O alloy is done by cold processing treatment in room temperature, thereby obtaining various alloy bars and plates. The alloy of the invention has super elasticity, low modulus, high strength, no biological toxicity, corrosion resistance, excellent biocompatibility and easy processing forming, and the alloy is capable of being widely used on biological implantation materials and other medical devices.

Description

technical field [0001] The invention relates to a titanium alloy in the technical field of medical devices and a preparation method thereof, in particular to a metastable β-type Ti-Nb-Ta-Zr-O alloy and a preparation method thereof. Background technique [0002] Due to its high strength, low elastic modulus, good biocompatibility, and excellent corrosion resistance, titanium alloys have gradually replaced stainless steel and cobalt-based alloys as substitute materials for hard tissues such as bones and teeth. At present, the most widely used titanium alloy in clinical practice is α+β type Ti-6Al-4V, but after a certain period of implantation in the human body, the alloy will release Al ions with cytotoxicity and neurotoxicity due to wear and corrosion, causing osteomalacia Symptoms such as , anemia and nervous disorders, in addition V is also considered to be an element that is toxic to organisms; and the elastic modulus of the alloy is about 115GPa, which is still much highe...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22F1/18A61L27/06
Inventor 郭文渊孙坚姚强邢辉
Owner SHANGHAI JIAO TONG UNIV
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