Beta titanium alloy composition and preparation method thereof

A β-titanium alloy and composition technology, which is applied in the field of β-titanium alloy composition and its preparation, can solve the problems of difficulty in obtaining equiaxed grains, low elastic modulus, and reduced plasticity, and achieve broad biomedical prospects and plastic shape The effect of large variables and simple mold equipment

Active Publication Date: 2013-10-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, scholars at home and abroad have reported using HPT method and ARB method to improve the strength of Ti-Nb-Ta-Zr alloy. It is suitable for the preparation of smaller flake materials, and it is difficult to obtain equiaxed grains after high-pressure torsion
Damon Kent et al. used the cumulative stacking method to bind the Ti–25Nb–3Zr–3Mo–2Sn alloy into plates. Although the strength of the material was greatly improved, the plasticity decreased sharply.
In summary, people have not yet found an effective method to increase the strength of β-titanium alloys without excessively reducing the plasticity and maintaining a low modulus of elasticity.

Method used

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  • Beta titanium alloy composition and preparation method thereof
  • Beta titanium alloy composition and preparation method thereof
  • Beta titanium alloy composition and preparation method thereof

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Embodiment 1

[0038] This embodiment relates to a kind of β titanium alloy composition, and its each component and percentage content are shown in Table 1:

[0039] This embodiment also relates to a method for preparing a β titanium alloy composition, the method comprising the steps of:

[0040] Step 1, take the ingredients and their percentages shown in Table 1. Ti is added in the form of sponge titanium (purity 99.5wt%), Zr is added in the form of sponge zirconium (purity 99.8wt%), and Nb is added in the form of niobium Add in the form of slabs (purity 99.6wt%), Ta in the form of tantalum strips (purity 99.6wt%), and press them into electrodes after thorough mixing;

[0041] Step 2, the electrode is smelted three times in a vacuum consumable electric arc furnace to obtain an ingot;

[0042] Step 3: The ingot is forged at 980°C, and the size after forging is Φ40×160mm 3 , and then solution treated at 800°C for 30 minutes and air cooled, seefigure 1 As shown, the crude β titanium alloy co...

Embodiment 2

[0053] This embodiment relates to a kind of β titanium alloy composition, and its each component and percentage content are shown in Table 3:

[0054] This embodiment also relates to a method for preparing a β titanium alloy composition, the method comprising the steps of:

[0055] Step 1: Take the ingredients and their percentages shown in Table 3. Ti is added in the form of sponge titanium (purity 99.5wt%), Zr is added in the form of sponge zirconium (purity 99.8wt%), and Nb is added in the form of niobium Add in the form of slabs (purity 99.6wt%), Ta in the form of tantalum strips (purity 99.6wt%), and press them into electrodes after thorough mixing;

[0056] Step 2, the electrode is smelted three times in a vacuum consumable electric arc furnace to obtain an ingot;

[0057] Step 3: The ingot is forged at 960°C, and the size after forging is Φ40×170mm 3 , and then after solution treatment at 800°C for 40 minutes and air cooling, see figure 1 As shown, the crude β titani...

Embodiment 3

[0069] This embodiment relates to a β titanium alloy composition, and its components and percentages are shown in Table 5:

[0070] This embodiment also relates to a method for preparing a β titanium alloy composition, the method comprising the steps of:

[0071] Step 1, take the ingredients and their percentages shown in Table 5. Ti is added in the form of sponge titanium (purity 99.5wt%), Zr is added in the form of sponge zirconium (purity 99.8wt%), and Nb is added in the form of niobium Add in the form of slabs (purity 99.6wt%), Ta in the form of tantalum strips (purity 99.6wt%), and press them into electrodes after thorough mixing;

[0072] Step 2, the electrode is smelted three times in a vacuum consumable electric arc furnace to obtain an ingot;

[0073] Step 3: The ingot is forged at 980°C, and the size after forging is Φ40×160mm 3 , and then solution treated at 800°C for 30 minutes and air cooled, see figure 1 As shown, the crude β titanium alloy composition is obta...

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Abstract

The invention provides a beta titanium alloy composition and a preparation method thereof. The composition consists of the following components in percentage by mass: 57-59% of Ti, 36-37% of Nb, 2-2.5% of Ta and 3-3.5% of Zr. The invention also relates to a preparation method of the composition. The preparation method comprises the following steps of: (I) proportioning the components in percentage by mass, mixing and pressing into an electrode; (II) smelting the electrode in a vacuum consumable electro-arc furnace to obtain an ingot; (III) performing hot working on the ingot, and performing heat treatment to obtain a crude beta titanium alloy composition; (IV) cutting the crude beta titanium alloy composition into a blank and performing surface pretreatment; (V) preheating an equal channel angular extrusion die and the blank, and coating a graphite lubricant; and heating and preserving heat; and (VI) extruding at 500-600 DEG C twice to four times and performing water quenching. The method provided by the invention is simple and easy to implement, has low cost and can remarkably refine the crystal grains; and the beta titanium alloy composition provided by the invention is a bone tissue substitute material with a broad medical prospect.

Description

technical field [0001] The invention relates to a titanium alloy material and a preparation method thereof, in particular to a β-titanium alloy composition and a preparation method thereof. Background technique [0002] As a medical metal material, it should have the characteristics of non-toxicity, physiological corrosion resistance, excellent biocompatibility and mechanical compatibility, and easy processing. Due to its light weight, non-toxicity, corrosion resistance, excellent biocompatibility and other characteristics, titanium alloy has been a medical material that scholars at home and abroad have focused on. The development of medical titanium alloys can be traced back to the early 1940s. Bothe and others first introduced pure titanium into the biomedical field and found that there was no adverse reaction between titanium and rat femurs. Pure titanium has good corrosion resistance in the physiological environment, but its strength is low and its wear resistance is po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
Inventor 林正捷吕维洁王立强薛晓冰覃继宁张荻
Owner SHANGHAI JIAO TONG UNIV
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