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Beta type Ti Nb Zr alloy with low modulus of elasticity, preparation method and application

A low elastic modulus, ti-nb-zr technology, applied in the field of medical materials, can solve the problems of increased alloy cost, increased difficulty of smelting, and alloys that are not easy to organize uniformly, and achieve the effect of controlling alloy cost

Inactive Publication Date: 2007-07-25
SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the addition of refractory rare metals such as Mo, Pd, Sn, and Ta will increase the difficulty of smelting and easily make the alloy composition uneven
In the patent US5169597, the alloy with 10-20% niobium content is a kind of α+β type alloy, and the elastic modulus is higher; while the alloy with 35-50% niobium content, the high niobium content will cause the cost of the alloy to increase, and make The smelting process becomes complicated, and it is difficult to obtain an alloy with uniform structure

Method used

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  • Beta type Ti Nb Zr alloy with low modulus of elasticity, preparation method and application
  • Beta type Ti Nb Zr alloy with low modulus of elasticity, preparation method and application

Examples

Experimental program
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Embodiment 1

[0021] Sponge titanium, sponge zirconium, and niobium-titanium master alloy are used as raw materials, and the weight percentage of each component is Nb35%, Ti65%. After being mixed and pressed to form an electrode, it is smelted into an ingot twice in a vacuum consumable electric arc furnace with a smelting voltage of 30 volts and a smelting current of 1500 amperes. Then directly aged at 500° C. for 6 hours, and water-cooled to prepare the alloy of the present invention. The measured tensile properties at room temperature are:

[0022] σ b =847MPa, σ 0.2 =751MPa, E=60GPa, δ=5.4%

Embodiment 2

[0024] The composition of the alloy is Nb35% and Zr5% by weight of each component. The balance is titanium. Aging treatment at 500° C. for 4 hours, water cooling, and other conditions are the same as in Example 1 to prepare the alloy of the present invention. The measured tensile properties at room temperature are:

[0025] σ b=875MPa,σ 0.2 =760MPa, E=59GPa, δ=8.1%

Embodiment 3

[0027] The alloy composition is that the weight percentage of each component is Nb35%, Zr10%. The balance is titanium. Aging treatment at 500° C. for 4 hours, water cooling, and other conditions are the same as those in Example 1, to prepare the alloy of the present invention. The measured room temperature tensile properties are:

[0028] σ b =706MPa,σ 0.2 =639MPa, E=51GPa, δ=20.1%

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Abstract

This invention discloses a beta-type Ti alloy with low elastic modulus for mrdical application. The Ti alloy comprises: Nb 30-37%, Zr 0-20%, and Ti. The cast structure of the Ti alloy is beta phase. The Ti alloy has moderate strength, and can satisfy the strength requirement for clinical bearing material. The elastic modulus of the Ti alloy is only 45-55% that of Ti-6Al-4V alloy. The alloy is a casting alloy, and has no noble metals added such as Ta, thus effectively lowering the cost. Besides, all the added elements have biocompatibility, and toxic elements are avoided. The Ti alloy has high biocompatibility and mechanical compatibility, and can be used to produce bone plates with reduced stress shielding effect.

Description

technical field [0001] The invention relates to a low elastic modulus β-type Ti-Nb-Zr alloy, a preparation method and an application thereof, and belongs to the field of medical materials used for replacement and repair of human hard tissues. Background technique [0002] Titanium alloys have been widely used in orthopedics, maxillofacial surgery, and cardiovascular because of their high strength, low elastic modulus, good biocompatibility, and excellent corrosion resistance. At present, the most widely used titanium alloy clinically is Ti-6Al-4V, but this alloy contains two elements, V and Al. Al can cause symptoms such as osteomalacia, anemia, and nervous disorders. Toxic elements, more toxic than Ni and Cr. In order to avoid the potential toxicity of V, two new α+β alloys Ti-5Al-2.5Fe and Ti-6Al-7Nb were developed in the mid-1980s [ZWICKER R, BUEHLER K, MUELLER R, et al. Mechanical properties and tissue reactions of a titanium alloy for implant material. Titanium 80 Sci...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C30/00C22C1/03B22D21/06C22F1/18
Inventor 宁聪琴戴尅戎丁冬雁
Owner SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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