CN113430411B - High-performance titanium alloy added with rare earth boride and preparation method thereof - Google Patents

Abstract

The invention discloses a high-performance titanium alloy added with rare earth boride and a preparation method thereof, relating to the field of powder metallurgy; the method comprises mixing spherical TC4 powder and irregular YbB ₆ Mixing the powder to obtain a mixture; putting the mixture into a graphite mold in batches; and (4) placing the graphite mold filled with the mixture into an SPS sintering furnace, and sintering under a vacuum state. On one hand, the method adds rare earth boride to obtain a titanium alloy material with higher performance, and can effectively improve the tensile strength, plasticity and wear resistance of the aluminum alloy. On the other hand, the compactness of the titanium alloy in the preparation process is improved through the SPS vacuum sintering process, compared with the material obtained by normal pressure sintering, the material has higher hardness, and meanwhile, the wear resistance of the material is improved.

Description

A kind of high-performance titanium alloy added with rare earth boride and preparation method thereof

technical field

The invention relates to the field of powder metallurgy, in particular to a high-performance titanium alloy added with rare earth boride and a preparation method thereof.

Background technique

TC4 titanium alloy is widely used in aerospace and biomedicine due to its high specific strength, corrosion resistance, good biocompatibility and high temperature resistance. However, the microstructure of the as-cast TC4 titanium alloy obtained by traditional smelting has many casting defects, porosity, composition segregation, etc. The obtained titanium alloy has poor mechanical properties, and a series of treatments are required to eliminate composition segregation and structural defects.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-performance titanium alloy with high strength and high hardness added with rare earth boride and a preparation method thereof, which can effectively improve the mechanical properties of the titanium alloy by adding rare earth boride.

Embodiments of the present invention are implemented as follows:

In a first aspect, the present invention provides a method for preparing a rare earth boride-added high-performance titanium alloy, comprising:

Mix spherical TC4 powder and irregular YbB ₆ powder to obtain a mixture;

Put the mixture into the graphite mold in batches;

Put the graphite mold with the mixture into the SPS sintering furnace, and carry out the sintering operation in a vacuum state.

In an optional embodiment, in the mixture, the mass ratio of spherical TC4 powder and irregular YbB ₆ powder is (99-100):(1-0.1).

In an optional embodiment, in the mixture, the mass ratio of spherical TC4 powder and irregular YbB ₆ powder is (99.2-99.5):(0.8-0.5).

In an optional embodiment, the mixture is obtained by adding spherical TC4 powder and irregular YbB ₆ powder into a ball milling tank for ball milling; wherein, the rotational speed of the ball milling is 200-300 r/min, and the ball-to-material ratio is (4-8 ): 1, the ball milling time is 1～3h;

or,

The mixture is obtained by adding spherical TC4 powder and irregular YbB ₆ powder into a ball mill tank for ball milling, followed by powder mixing and stirring; wherein, the rotational speed of the ball milling is 200-300 r/min, and the ball-to-material ratio is (4-8): 1. The ball milling time is 1-3h; the stirring speed is 30-40rpm, and the stirring time is 2-3h.

In an optional embodiment, in the step of putting the mixture into the graphite mold in batches:

Before putting into the graphite mold, it also includes outsourcing the batches of mixed materials with graphite paper.

In an optional embodiment, in the step of putting the mixture into the graphite mold in batches:

Add 15g of the mixture to the graphite mold of Ф20mm each time.

In an optional embodiment, the sintering operation is performed in a vacuum state, and specifically, the vacuum is evacuated to below 100 MPa.

In an optional embodiment, the parameters of the sintering operation are a sintering temperature of 1000-1200° C., a sintering rate of 80-100° C./min, a sintering holding time of 2-10 minutes, and a sintering pressure of 25-35 Mpa.

In an optional embodiment, the parameters of the sintering operation are a sintering temperature of 1100° C., a sintering rate of 100° C./min, a sintering holding time of 5 minutes, and a sintering pressure of 30 Mpa.

In a second aspect, the present invention provides a rare earth boride-added high-performance titanium alloy, and the rare-earth boride-added high-performance titanium alloy is prepared by the method for preparing a rare-earth boride-added high-performance titanium alloy according to any one of the foregoing embodiments. get.

The embodiments of the present invention have at least the following advantages or beneficial effects:

The embodiment of the present invention provides a preparation method of a high-performance titanium alloy added with rare earth boride, including mixing spherical TC4 powder and irregular YbB ₆ powder to obtain a mixture; placing the mixture in a graphite mold in batches ; Put the graphite mold with the mixture into the SPS sintering furnace, and carry out the sintering operation in a vacuum state. On the one hand, this method adds rare earth borides to obtain higher-performance titanium alloy materials. The addition of rare earth borides can suppress grain growth and form new phases to refine the crystal structure. And in the preparation process, the Yb element reacts with oxygen to absorb the oxygen content dissolved in the titanium matrix, so as to avoid the adverse effect of oxidation of the titanium alloy on the properties, and the generated TiB is dispersed and distributed in the titanium matrix as a reinforcing phase, reducing the sintering product. defects and improve tensile strength and plasticity as well as wear resistance. On the other hand, the vacuum sintering process of SPS improves the compactness of the titanium alloy during the preparation process. Compared with the material obtained by normal pressure sintering, the material has higher hardness and the wear resistance of the material is improved.

Embodiments of the present invention also provide a high-performance titanium alloy added with rare earth boride, which is prepared by the above method. Therefore, it has the advantages of high strength and high hardness.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the scanning electron microscope image of the high-performance titanium alloy added with rare earth boride provided in Example 1 of the present invention;

Fig. 2 is the scanning electron microscope image of the high-performance titanium alloy added with rare earth boride provided in Example 2 of the present invention;

FIG. 3 is a scanning electron microscope image of the high-performance titanium alloy added with rare earth boride provided in Example 3 of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not indicated in the examples, it is carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used without the manufacturer's indication are conventional products that can be purchased from the market.

The features and performances of the present invention will be further described in detail below in conjunction with the embodiments.

An embodiment of the present invention provides a method for preparing a rare earth boride-added high-performance titanium alloy, which includes the following steps:

S1: mixing spherical TC4 powder and irregular YbB ₆ powder to obtain a mixture;

S2: Put the mixture into the graphite mold in batches;

S3: Put the graphite mold with the mixture into the SPS sintering furnace, and perform the sintering operation in a vacuum state.

In detail, in the above preparation method, on the one hand, a titanium alloy material with higher performance can be obtained by adding rare earth boride. And it is embodied in the fact that rare earth borides can inhibit the growth of grains and form new phases to refine the crystal structure. And in the preparation process, the Yb element reacts with oxygen to absorb the oxygen content dissolved in the titanium matrix, so as to avoid the adverse effect of titanium alloy oxidation on the properties, and the generated TiB is dispersed and distributed in the titanium matrix as a reinforcing phase, reducing the sintering product. defects and improve tensile strength and plasticity as well as wear resistance. On the other hand, because in the prior art, the material is sintered under atmospheric pressure without pressurizing the material at atmospheric pressure, the sintered product has a large internal porosity, and the relative density of the sample only reaches 75%-90% . The mechanical properties of the sintered product are poor. Therefore, the embodiment of the present invention improves the compactness of the titanium alloy during the preparation process through the vacuum sintering process of SPS. The SPS sintering technology obtains dense sintering under high temperature and high pressure through the direct current pulse voltage heating of the graphite mold and the spark discharge heating between the powder particles. Compared with the material obtained by atmospheric pressure sintering, it has higher hardness, and the wear resistance of the material is improved. And because the vacuum sintering is performed, the oxidation of the titanium alloy can be effectively avoided in a vacuum state, so that the quality of the prepared titanium alloy can be further improved.

That is, in the embodiments of the present invention, the mechanical properties of the samples can be improved by the SPS sintering technique. At the same time, the added rare earth boride undergoes an in-situ reaction during high-temperature sintering during the preparation process. On the one hand, it absorbs the oxygen element dissolved in the titanium alloy matrix to generate Yb ₂ O ₃ , which avoids the oxidation of the titanium alloy and reduces the oxygen content in the titanium matrix. Therefore, the elongation and tensile strength of the material are improved; on the other hand, the addition of rare earth YbB ₆ in the sintering process, under high temperature and high pressure, has an in-situ autogenous reaction with the titanium matrix, and the generated Yb ₂ O ₃ and TiB are used as the second phase. Dispersed and distributed in the titanium matrix, the in-situ synthesized TiB has high hardness and can improve the strength of the titanium alloy. At the same time, TiB bears the main load during the wear process, reducing the tendency of plastic deformation and improving the wear resistance of the titanium alloy. .

In more detail, in step S1, in the mixture, the mass ratio of spherical TC4 powder and irregular YbB ₆ powder is (99-100):(1-0.1). Controlling the amount of spherical TC4 powder and irregular YbB ₆ within this range can ensure that the irregular YbB ₆ powder undergoes in-situ reaction during high temperature sintering. On the one hand, it absorbs the oxygen element dissolved in the titanium alloy matrix to generate Yb ₂ O ₃ , thereby reducing the oxygen content in the titanium matrix and improving the elongation of the material; at the same time, the generated Yb ₂ O ₃ and TiB are dispersed and distributed in the titanium matrix as the second phase to improve the strength and wear resistance of the titanium alloy.

As an optional solution, in the mixture, the mass ratio of spherical TC4 powder and irregular YbB ₆ powder is (99.2-99.5):(0.8-0.5). Similar to the above principle, when the dosage of spherical TC4 powder and irregular YbB ₆ is controlled within this range, the strength and hardness of the prepared titanium alloy can be further ensured, and its excellent wear resistance can be ensured.

In more detail, in step S1, the mixture is obtained by adding spherical TC4 powder and irregular YbB ₆ powder into a ball milling tank for ball milling, followed by mixing and stirring. Among them, the rotating speed of the ball mill is 200-300r/min, preferably 300r/min; the ball-to-material ratio is (4-8):1, preferably 6:1, the ball-milling time is 1-3h; the stirring speed is 30-40rpm , preferably 30-35rpm; stirring time is 2-3h, preferably 2h.

Specifically, the ball milling operation is carried out in the ball milling of the QM-3SP4 planetary ball mill, and the ball milling method is used for mixing to obtain a uniformly distributed mixed powder. If the ratio is too large, the powder particles will be broken, and if the rotation speed is too large, the grinding effect of the ball mill will decrease due to centrifugal action. If the time is too long, the particles will be too fine and more likely to agglomerate together. Therefore, when the parameters of the ball mill are controlled within the range , a uniform powder can be obtained efficiently.

At the same time, the powder mixing step is carried out on the ZX-0.5 double cone high-efficiency mixer, which can further improve the uniformity of the powder and ensure the quality and performance of the titanium alloy prepared by later sintering. Of course, in other embodiments, powder mixing or ball milling operations can also be performed independently. In this case, in order to ensure the uniformity of powder mixing, the operation time can be appropriately extended, which is not repeated in this embodiment.

In more detail, in step S2, before putting into the graphite mold, it also includes outsourcing the batches of mixed materials with graphite paper. Among them, the purpose of using graphite paper for outsourcing is to prevent the bonding of the sample and the mold during the sintering process, and to further prevent the oxidation of the titanium alloy during the sintering process, thereby further ensuring the quality and performance of the prepared aluminum alloy. .

Meanwhile, in step S2, 15g of the mixture is added to the graphite mold of Ф20mm each time in batches. The purpose of this setting is to control the amount of powder added during the sintering process, to prevent the powder from leaking out of the mold during the sintering process, thereby reducing the influence of the amount of powder on the properties of the product, thereby ensuring the quality and performance of the aluminum alloy. Of course, in other embodiments of the present invention, when the size of the graphite mold changes, the quality of the single-use mixture can also be adjusted and improved accordingly, so as to ensure the efficient sintering operation. Not limited.

In more detail, in step S3, spherical TC4 powder and nano- _YbB6 powder are mixed and then sintered, and the reason for choosing SPS plasma sintering is that, compared with normal pressure sintering, it can not only be sintered at high temperature, but also can be sintered in the heating process. The medium pressure and the heating speed are fast, which greatly saves the sintering time. During the sintering process, the microstructure is controllable and acts on the vacuum environment, reducing the powder pollution. The obtained sintered block is dense and uniform, with fewer defects, which greatly improves the mechanical properties of the material. It provides favorable conditions for the application of titanium alloys.

At the same time, the sintering operation is carried out in a vacuum state, and specifically, the vacuum is evacuated to below 100 MPa. With this arrangement, sintering under vacuum can prevent the titanium alloy from reacting with oxygen in the air, thereby ensuring product quality and performance.

And, in step S3, the sintering parameters are for temperature control of sintering, and the SPS process is divided into four stages: activation and rearrangement of particles, bonding of particles, growth of agglomerates, and overall deformation. When the above-mentioned four sintering stages are sequentially performed and all completed, a high-quality sintered cake can be obtained. Therefore, in the embodiment of the present invention, the parameters of the sintering operation are the sintering temperature of 1000-1200° C., the sintering rate of 80-100° C./min, the sintering holding time of 2-10 minutes, and the sintering pressure of 25-35 Mpa. And preferably, the parameters of the sintering operation are a sintering temperature of 1100° C., a sintering rate of 100° C./min, a sintering holding time of 5 minutes, and a sintering pressure of 30 Mpa. And when the sintering temperature is 1100℃, the dense body has the best mechanical properties. If the sintering temperature is lower than 1100 °C, the sintered product has many pores and is not dense enough, which affects the mechanical properties. When the sintering temperature is higher than 1100 °C, the properties of the sintered product are not improved. Properties The sintering temperature was set to 1100°C.

Embodiments of the present invention also provide a rare earth boride-added high-performance titanium alloy, and the rare-earth boride-added high-performance titanium alloy is prepared by any one of the foregoing embodiments. prepared. Therefore, the rare earth boride-added high-performance titanium alloy has the advantages of high strength, high hardness and high wear resistance.

The present invention provides a high-performance titanium alloy added with rare earth boride and its preparation method in detail below with reference to the examples, but they should not be construed as limiting the protection scope of the present invention.

Example 1

The present embodiment provides a high-performance titanium alloy added with rare earth boride, which is prepared by the following method:

S1: The spherical TC4 powder is proportioned in an argon protective glove isolation box and put into a ball mill tank, and the mixing tank is assembled in a QM-3SP4 planetary ball mill for ball milling. The ball-to-material ratio of ball milling is 6:1 , the rotating speed is 300r/min, and the ball milling time is 2h; then the powder after ball milling is mixed on the ZX-0.5 double cone high-efficiency mixer, and the mixing time is 2h to obtain the mixture;

S2: Outsource the mixed powder with graphite paper in batches of 15g each, and put it into a graphite mold of Ф20mm;

S3: Put the graphite mold into the SPS sintering furnace, vacuumize it to below 100MPa, and then carry out the sintering operation. At room temperature, a dense and uniform titanium alloy sintered body was obtained.

Example 2

The present embodiment provides a high-performance titanium alloy added with rare earth boride, which is prepared by the following method:

S1: The spherical TC4 powder and the irregular YbB ₆ powder with the same mass as in Example 1 but the mass ratio of 99.4:0.6 were proportioned in an argon protective glove isolation box and put into a ball mill jar, and the mixture was jarred Equipped with QM-3SP4 planetary ball mill for ball milling, the ball-to-material ratio of ball milling is 5:1, the speed is 300r/min, and the ball milling time is 2h; then the powder after ball milling is mixed on the ZX-0.5 type double cone high-efficiency mixer. powder, the mixing time is 2h, and the mixture is obtained;

S2: Outsource the mixed powder with graphite paper in batches of 15g each, and put it into a graphite mold of Ф20mm;

S3: Put the graphite mold into the SPS sintering furnace, vacuumize it to below 100MPa, and then carry out the sintering operation. At room temperature, a dense and uniform titanium alloy sintered body was obtained.

Example 3

The present embodiment provides a high-performance titanium alloy added with rare earth boride, which is prepared by the following method:

S1: The spherical TC4 powder and irregular YbB ₆ powder with the same mass as in Example 1 but with a mass ratio of 99:1 will be proportioned in an argon-protected glove isolation box and put into a ball mill jar, and the mixing jar will be Assembled in a QM-3SP4 planetary ball mill for ball milling, the ball-to-material ratio of ball milling is 4:1, the speed is 200r/min, and the ball milling time is 1h; then the powder after ball milling is carried out on a ZX-0.5 double-cone high-efficiency mixer. Mixing powder, the mixing time is 1h, and the mixture is obtained;

S2: Outsource the mixed powder with graphite paper in batches of 15g each, and put it into a graphite mold of Ф20mm;

S3: Put the graphite mold into the SPS sintering furnace, vacuumize it to below 100MPa, and then carry out the sintering operation. At room temperature, a dense and uniform titanium alloy sintered body was obtained.

Example 4

The present embodiment provides a high-performance titanium alloy added with rare earth boride, which is prepared by the following method:

S1: The spherical TC4 powder of the same quality as that of Example 1 was subjected to component proportioning in an argon protective glove isolation box and put into a ball mill tank, and the mixing tank was assembled in a QM-3SP4 planetary ball mill for ball milling. The ball-to-material ratio is 4:1, the rotation speed is 300r/min, and the ball milling time is 1h; then the powder after ball milling is mixed on a ZX-0.5 double-cone high-efficiency mixer, and the mixing time is 1h to obtain a mixture;

S2: Outsource the mixed powder with graphite paper in batches of 15g each, and put it into a graphite mold of Ф20mm;

S3: Put the graphite mold into the SPS sintering furnace, and vacuumize it to below 100MPa, and then carry out the sintering operation. At room temperature, a dense and uniform titanium alloy sintered body was obtained.

Experimental example

The high-performance titanium alloys with rare earth borides prepared in Examples 1-4 were used to measure the grain size of the particles in the metallographic diagram with ImageJ software, and the density of the samples was measured by the Archimedes drainage method, and the density of the samples was obtained by calculation, The test results are shown in Table 1. At the same time, a Vickers hardness tester (ZHU-S) was used to measure the Vickers hardness of the aluminum alloys prepared in Examples 1-4 by applying a force of 3N, and a universal machine was used to measure the resistance of the TC4 titanium alloys provided in Examples 1-4. Tensile strength, the friction coefficient test results of the material measured by the pin-on-disk wear tester are shown in Table 2. In addition, the distribution of YbB ₆ in the titanium alloy matrix and the formation of the second phase provided in Examples 1-3 were observed by scanning electron microscopy, and the microscopic morphology was shown in Figures 1, 2 and 3.

Table 1 Density test results of TC4 titanium alloy composites

Table 2 Test results of hardness, tensile strength and friction properties of TC4 titanium alloy composites

According to the data in Table 1, it can be seen that by using the preparation method provided by the embodiment of the present invention, Examples 1-4 can obtain aluminum alloys with higher density and lower internal porosity. However, from the comparison of Examples 1 and 4 with Examples 2 and 3, it can be seen that due to the lack of irregular borides in Examples 1 and 4, the density and porosity of Examples 1 and 4 are not as good as those in which irregular borides are added. 2 and 3, it can be proved that the addition of boride is beneficial to improve the density and porosity of the raw material, and the added YbB ₆ powder is uniformly dispersed in the titanium matrix, so it can be used for the preparation of small parts. At the same time, it can be seen from the comparison between Example 1 and Example 4 that when the sintering temperature is kept at 1100 °C, the dense body has the best mechanical properties. From the comparison between Examples 2 and 3, it can be seen that when the mass ratio of titanium alloy powder and YbB6 powder provided in Example 2 is 99.4:0.6, the sintering temperature is 1100°C, the sintering rate is 100°C/min, and the sintering pressure is At 30MPa, its comprehensive mechanical properties are better, and higher performance titanium alloys can be obtained, which have the advantages of high density and extremely low internal porosity.

According to the data in Table 2, the high-performance titanium alloys with rare earth borides added in Examples 1-4 of the present invention are prepared by the preparation method provided in the examples of the present invention, so their hardness, tensile strength, yield strength All have a certain improvement, the friction coefficient is reduced, the surface roughness is low, the wear resistance is improved, and the mechanical properties are optimized. However, the hardness, tensile strength and yield strength of Example 1 and Example 4 are not as good as those of Example 2 and Example 3 because no boride is added, and the friction coefficient is also relatively high. The preparation method of the invention can further improve its hardness, strength and friction coefficient. In addition, it can be seen from the comparison between Example 1 and Example 4 that when the sintering temperature is kept at 1100°C, the dense body has the best mechanical properties. The comparison between Example 2 and Example 3 shows that when the mass ratio of titanium alloy powder and YbB6 powder provided in Example 2 is 99.4:0.6, the sintering temperature is 1100°C, the sintering rate is 100°C/min, and the sintering pressure is At 30MPa, its comprehensive mechanical properties are better, and the tensile strength of the titanium alloy is increased to 1150, which can be increased by 17.4% compared with the existing technology; the hardness of the material can be increased to 420HV, and its tensile strength and hardness are significantly improved. Therefore, it can be used for the preparation of some wear parts under poor working conditions.

At the same time, according to the display in Figure 1 to Figure 3, when the added YbB ₆ content is 0.6%, the grains are uniformly dispersed in the titanium alloy matrix, and when the added YbB ₆ content is 1%, the grains begin to reunion.

To sum up, the high-performance titanium alloy with rare earth boride added prepared by the method provided in the embodiments of the present invention has the advantages of high strength, high hardness and good wear performance, and after optimization treatment, the added second phase is evenly distributed On the surface of the titanium matrix, a titanium alloy composite material with good compactness is obtained by the SPS sintering process, which improves the comprehensive mechanical properties of the prepared titanium alloy.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. a preparation method of the high-performance titanium alloy adding rare earth boride, is characterized in that, be specially following steps: Mix spherical TC4 powder and irregular YbB ₆ powder to obtain a mixture; The mixture is put into the graphite mould in batches; Putting the graphite mold with the mixture into the SPS sintering furnace, and carrying out the sintering operation in a vacuum state; The parameters of sintering operation are sintering temperature of 1000-1200°C, sintering rate of 80-100°C/min, sintering holding time of 2-10min, and sintering pressure of 25-35MPa; In the step of putting the mixed material into the graphite mold in batches: before putting the mixed material into the graphite mold, it also includes outsourcing the mixed material in batches with graphite paper. 2. the preparation method of the high-performance titanium alloy that adds rare earth boride according to claim 1, is characterized in that: In the mixture, the mass ratio of the spherical TC4 powder and the irregular YbB ₆ powder is (99-100): (1-0.1). 3. the preparation method of the high-performance titanium alloy that adds rare earth boride according to claim 2, is characterized in that: In the mixture, the mass ratio of the spherical TC4 powder and the irregular YbB ₆ powder is (99.2-99.5):(0.8-0.5). 4. The preparation method of the high-performance titanium alloy added with rare earth boride according to any one of claims 1 to 3, characterized in that: The mixture is obtained by adding the spherical TC4 powder and the irregular YbB ₆ powder into a ball milling tank for ball milling; wherein, the rotational speed of the ball milling is 200-300 r/min, and the ball-to-material ratio is (4-8): 1. The ball milling time is 1～3h; or, The mixed material is obtained by adding the spherical TC4 powder and the irregular _YbB6 powder into a ball mill tank for ball milling, followed by mixing and stirring; wherein, the rotational speed of the ball milling is 200-300 r/min, and the ball-to-material ratio is (4～8): 1, the ball milling time is 1～3h; the stirring speed is 30～40rpm, and the stirring time is 2～3h. 5. The preparation method of the rare earth boride-added high-performance titanium alloy according to any one of claims 1 to 3, characterized in that, in the step of putting the mixed material into the graphite mold in batches : 15g of the mixture was added to the graphite mold of Φ20mm each time. 6. the preparation method of the high-performance titanium alloy that adds rare earth boride according to claim 1, is characterized in that: The parameters of the sintering operation are the sintering temperature of 1100°C, the sintering rate of 100°C/min, the sintering holding time of 5 minutes, and the sintering pressure of 30 MPa. 7. A high-performance titanium alloy added with rare earth boride, characterized in that: The rare earth boride-added high-performance titanium alloy is prepared by the method for preparing a rare-earth boride-added high-performance titanium alloy according to any one of claims 1 to 6.

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