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High-elasticity and high-strength titanium alloy and preparing method and application thereof

A titanium alloy, high-elasticity technology, applied in the field of high-elasticity and high-strength oxygen-containing titanium alloys and their preparation, can solve problems such as increasing preparation cost, element segregation, and influence on alloy properties, achieving important theoretical significance and engineering value, reducing The effect of preparation cost and reduction of smelting difficulty

Active Publication Date: 2019-04-16
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this design alloy contains more β-stable elements (Ta, Nb, etc.) and / or neutral elements (Zr, Hf, Sn, etc.), making these alloys contain complex alloy compositions, which are easy to The introduction of impurities will cause element segregation and other phenomena, which will affect the properties of the alloy. In addition, the alloy contains more high-melting point components, thereby increasing the preparation cost.
In addition, some studies have controlled the texture of titanium alloys to obtain better mechanical properties by cold processing titanium alloys, but the properties of alloys obtained by this processing method have obvious anisotropy

Method used

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  • High-elasticity and high-strength titanium alloy and preparing method and application thereof
  • High-elasticity and high-strength titanium alloy and preparing method and application thereof
  • High-elasticity and high-strength titanium alloy and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of as-rolled Ti-14.6Nb-0.16O alloy

[0030] (1) Prepare high-purity Ti ingot, Nb ingot, TiO 2 Powder raw materials, and according to the ratio of the above alloy components, the raw materials are subjected to steps such as ultrasonic cleaning and pickling to remove surface impurities. The raw materials are put into a vacuum non-consumable electric arc furnace for smelting, and smelted into TiNbO ingots.

[0031] (2) Homogenize the TiNbO ingot at 1100° C. for 2 hours, and then perform hot forging at 600° C. to obtain an alloy plate.

[0032] (3) Hot-rolling the above-mentioned alloy plate at 600° C., with a rolling amount of 80%.

[0033] The Ti-14.6Nb-0.16O alloy prepared in this implementation is 2.44, is 2.81 and e / a is 4.09. From figure 1 It can be seen from the XRD patterns of the obtained alloys that they are mainly α and β phases. Pass the tensile test (see figure 2 Shown), the modulus of elasticity of the titanium alloy is 80GPa,...

Embodiment 2

[0034] Example 2: Preparation of aged Ti-14.6Nb-0.16O alloy

[0035] (1) Prepare high-purity Ti ingot, Nb ingot, TiO 2 Powder raw materials, and according to the ratio of the above alloy components, the raw materials are subjected to steps such as ultrasonic cleaning and pickling to remove surface impurities. The raw materials are put into a vacuum non-consumable electric arc furnace for smelting, and smelted into TiNbO ingots.

[0036] (2) Homogenize the ingot at 1100°C for 2 hours, and then perform hot forging at 600°C to obtain an alloy plate;

[0037] (3) hot-rolling the above-mentioned alloy plate at 600°C, with a rolling capacity of 80%;

[0038] (4) annealing the above-mentioned rolled plate at 600° C. for 60 minutes, and air cooling;

[0039] (5) The above alloy was aged at 350° C. for 60 minutes, and air-cooled.

[0040] The Ti-14.6Nb-0.16O alloy prepared in this implementation is 2.44, is 2.81 and e / a is 4.09. The alloy is mainly α and β phase, and contains a ...

Embodiment 3

[0041] Example 3: Preparation of annealed Ti-8Nb-2Fe-0.28O alloy

[0042] (1) Prepare high-purity Ti ingot, Nb ingot, Fe ingot, TiO 2 Powder raw materials, and according to the ratio of the above alloy components, the raw materials are subjected to steps such as ultrasonic cleaning and pickling to remove surface impurities. The raw materials are put into a vacuum non-consumable electric arc furnace for smelting, and smelted into ingots.

[0043] (2) Homogenize the ingot at 1100° C. for 2 hours, and then perform hot forging at 600° C. to obtain an alloy plate.

[0044] (3) Hot-rolling the above-mentioned alloy plate at 600° C., with a rolling amount of 80%.

[0045] (4) Anneal the above-mentioned rolled plate at 700° C. for 30 minutes, and then water-cool it.

[0046] The Ti-8Nb-2Fe-0.28O alloy prepared in this implementation is 2.41, is 2.79 and e / a is 4.12. The alloy is mainly α and β phase, and a small amount of ω phase (see figure 1 shown). Such as image 3 As sh...

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Abstract

The invention discloses a high-elasticity and high-strength titanium alloy. The high-elasticity and high-strength titanium alloy comprises 6-18 wt% of Nb, 0.1-0.5 wt% of O and the balance Ti. The average valence electron concentration e / a of the titanium alloy is 4.08-4.12, wherein one value shown in the specification is 2.41-2.44, the other value shown in the specification is 2.80-2.83, the elasticity modulus is 60-80 GPa, the tensile strength is 850 MPa or above, and the structure of the titanium alloy is mainly alpha + beta two phases. The invention further discloses a preparing method andapplication of the high-elasticity and high-strength titanium alloy. The high-elasticity and high-strength titanium alloy has excellent mechanical performance, meanwhile, the smelting difficulty of the high-elasticity and high-strength titanium alloy is low, and important theoretical significance and engineering value are achieved.

Description

technical field [0001] The invention relates to the field of advanced titanium alloys, in particular to a highly elastic and high-strength oxygen-containing titanium alloy and its preparation method and application. Background technique [0002] As an important structural and functional integrated material, metal materials or alloys with high elasticity and high strength have extensive and important demands in the fields of aviation, aerospace, ships, automobiles, biomedicine, precision instruments, and daily necessities. Due to its low density, high specific strength, corrosion resistance, non-magnetic properties, and high biocompatibility, titanium alloys are widely used in aviation, aerospace, chemical, ship, medical and daily necessities industries. However, although traditional α+β and near-β titanium alloys have high strength, their applications are limited due to their high elastic modulus (90GPa-120GPa), ie, low elastic properties. For this reason, high-elasticity a...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18C22F1/02
CPCC22C1/02C22C14/00C22F1/02C22F1/183
Inventor 肖文龙王俊帅马朝利付雨陈璐
Owner BEIHANG UNIV
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