A high-resistance titanium alloy with uniform resistivity and a preparation method thereof

Abstract

The present invention discloses a high-resistance titanium alloy with uniform resistivity and a preparation method thereof. When the high-resistance titanium alloy uses a single-phase α-type titanium alloy as a matrix, it comprises the following raw material components, by mass percentage: 1.8% to 2.0% Al, 2.2% to 2.4% Zr, 1.5% to 10.5% ceramic powder, and the balance Ti. When the high-resistance titanium alloy uses an α+β-type titanium alloy as a matrix, it comprises the following raw material components, by mass percentage: 5.3% to 5.9% Al, 3.5% to 3.9% V, 1.6% to 10.5% ceramic powder, and the balance Ti. The present invention utilizes a double vacuum melting method to produce the as-cast high-resistance titanium alloy. The as-cast high-resistance titanium alloy is then subjected to a cyclic heat treatment. Through repeated heating and cooling, the alloy undergoes a phase transformation, generating phase fluctuations, achieving a uniform distribution of ceramic powder particles and a uniform titanium alloy matrix structure, thereby obtaining a high-resistance titanium alloy with uniform resistivity.

Description

Technical Field

[0001] The present invention belongs to the field of titanium alloy materials, and in particular relates to a high-resistance titanium alloy with uniform resistivity and a preparation method thereof. Background Art

[0002] High-resistance alloys are commonly used in electronic components for instruments and equipment such as motors, resistors, potentiometers, and resistance heating devices. Commonly used high-resistance alloys include nickel-based alloys (nickel-chromium, nickel-chromium-aluminum, nickel-molybdenum-aluminum) and iron-based alloys (iron-nickel-chromium-molybdenum, iron-chromium-aluminum), with resistivities ranging from 1.1 to 1.7 μΩ·m. However, nickel-based and iron-based alloys have high densities, making them incompatible with the weight reduction requirements of major sectors such as aerospace and marine engineering.

[0003] As a typical lightweight and high-strength alloy, titanium alloy has excellent mechanical properties, good corrosion resistance and high temperature resistance, and can be used as a lightweight and high-resistance alloy. At present, in addition to high-strength titanium alloys such as TC4 and TC11, medium-strength titanium alloys in domestic commercial use are mainly pure titanium, α-type or near-α-type titanium alloys such as TA22, TA24, TA16 and TA17. Under 20°C conditions, the resistivity of α-type titanium alloy is 0.6~1.1μΩ·m, and the resistivity of (α+β)-type titanium alloy is 1.0~1.6μΩ·m. Obviously, changing the type and ratio of alloying elements cannot significantly increase the resistivity of titanium alloys. Therefore, how to improve the resistivity of titanium alloys on the basis of existing titanium alloys while ensuring the mechanical properties of existing titanium alloys has become a research difficulty.

[0004] Currently, the commonly used methods for preparing particle-reinforced titanium alloys mainly include melt casting, powder metallurgy, additive manufacturing, etc., but the specifications of materials prepared by powder metallurgy and additive manufacturing are limited and cannot be processed into large-sized workpieces. The invention patent with patent number CN111659887A discloses a method for preparing refined TiC particle-reinforced titanium-based composite materials. The method is: after purifying carbon nanotubes, titanium powder and carbon nanotubes are ball-milled, and then low-temperature rapid discharge plasma sintering is used to prepare TiC particle-reinforced titanium-based composite materials. The invention patent with patent number CN113215441A discloses a method for preparing nanoparticle-reinforced titanium alloys. The method is: preparing titanium-based composite powder by high-energy ball milling, and then preparing titanium-based composite materials by selective laser melting. The invention patent with patent number CN112342436A discloses a method for preparing particle-reinforced titanium alloys. The method uses a melt casting method to obtain nanoparticle-reinforced ZTC4 titanium alloy ingots.

[0005] Currently, common heat treatments for high-resistance titanium alloys include solution aging and annealing. Patent No. CN108611583A utilizes high-temperature homogenization and solution treatment to effectively eliminate segregation and promote the dissolution of the second phase. Furthermore, a short period of artificial aging allows the precipitated phase to be evenly dispersed within the matrix alloy. Patent No. CN112958784A discloses a method for uniformly distributing the reinforcing phase in a particle-reinforced titanium-based composite material. This method achieves uniform distribution of the reinforcing phase within the particle-reinforced titanium-based composite material through an annealing process at 700-1000°C for 0.5-6 hours. However, for this type of high-resistance titanium alloy, ceramic powder is doped into the titanium alloy matrix. Common heat treatment methods cannot simultaneously address the problems of ceramic particle agglomeration and matrix microstructure uniformity, making it difficult to obtain a high-resistance titanium alloy with uniform resistivity. Summary of the Invention

[0006] To address the problems of existing high-resistance titanium alloys, the present invention aims to provide a high-resistance titanium alloy with uniform resistivity and a method for preparing the same. The present invention utilizes a single-phase α-type titanium alloy or an α+β-type titanium alloy as a matrix and ceramic powder as a doping phase. Based on the compositional design concept of "a titanium alloy matrix doped with a ceramic powder," the cast high-resistance titanium alloy is first produced using a dual vacuum melting method, i.e., a combination of vacuum consumable melting and vacuum arc melting. The cast high-resistance titanium alloy is then subjected to a cyclic heat treatment. Through repeated heating and cooling, the alloy undergoes a phase transformation, generating phase fluctuations, achieving a uniform distribution of ceramic powder particles and a uniform structure within the titanium alloy matrix, thereby obtaining a high-resistance titanium alloy with uniform resistivity.

[0007] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

[0008] On the one hand, the high-resistance titanium alloy with uniform resistivity provided by the present invention has a single-phase α-type titanium alloy or an α+β-type titanium alloy as a matrix and ceramic powder as a doping phase; when the high-resistance titanium alloy has a single-phase α-type titanium alloy as a matrix, the high-resistance titanium alloy includes the following raw material components by mass percentage: Al 1.8% to 2.0%, Zr 2.2% to 2.4%, ceramic powder 1.5% to 10.5%, and the balance is Ti; when the high-resistance titanium alloy has an α+β-type titanium alloy as a matrix, the high-resistance titanium alloy includes the following raw material components by mass percentage: Al 5.3% to 5.9%, V 3.5% to 3.9%, ceramic powder 1.6% to 10.5%, and the balance is Ti.

[0009] Preferably, the ceramic powder is any one of Al2O3, SiO2, ZrO2, and SiC.

[0010] On the other hand, the present invention provides a method for preparing the high-resistance titanium alloy with uniform resistivity, comprising the following steps:

[0011] Step 1:

[0012] Titanium powder and ceramic powder are weighed according to the ratio, and the mixed titanium powder and ceramic powder are charged into a mixer and stirred several times until the powders are evenly mixed. The evenly mixed powders are then placed into a rubber sleeve under vacuum protection and sealed. The sealed rubber sleeve is then placed in a cold isostatic pressing device and pressurized to press the powders into a high-density rod-shaped blank.

[0013] Step 2:

[0014] Weighing the matrix raw materials required for the single-phase α-type titanium alloy matrix or the α+β-type titanium alloy matrix according to the proportion, mixing and stirring the prepared matrix raw materials multiple times to obtain a mixed matrix raw material;

[0015] Step 3:

[0016] The rod-shaped blank obtained in step 1 and the matrix material obtained by mixing in step 2 are added into a mold and pressed into a plurality of electrode blocks. The plurality of electrode blocks are then welded axially in a vacuum welding box to form a consumable electrode. The consumable electrode and the auxiliary electrode are then welded axially in a vacuum welding box to obtain a welded part of the consumable electrode and the auxiliary electrode.

[0017] Step 4:

[0018] The welded parts of the consumable electrode and the auxiliary electrode in step 3 are placed in the furnace body of a vacuum consumable melting furnace, arc starting material is added to the bottom of the crucible, vacuum consumable melting is performed, and after the melting is completed, cooling is performed to obtain an intermediate ingot, and the intermediate ingot is surface turned to obtain an intermediate ingot with a good surface;

[0019] Step 5:

[0020] The intermediate ingot with a good surface obtained in step 4 is added to the molten pool of the vacuum arc furnace, the water cooling system is turned on, the vacuum is evacuated, and then the molten metal after smelting is cast into a graphite cold mold, and the surface is turned on the lathe after cooling to obtain a cast high-resistance titanium alloy with a good surface;

[0021] Step 6:

[0022] The as-cast high-resistance titanium alloy obtained in step five is placed in a vacuum resistance furnace for cyclic heat treatment, then kept at 950-1050° C. for 30-50 minutes, and cooled in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0023] Preferably, in step one, the mass ratio of titanium powder to ceramic powder is 1:(1.5-2.5); the prepared titanium powder and ceramic powder are added into a mixer and stirred and mixed 2-5 times, with each mixing time being 2-3 minutes; the rubber sleeve is cylindrical with a length of 18-22 cm, the cold isostatic pressing pressure is between 200-300 MPa, and the holding time is 15-30 minutes.

[0024] Preferably, in the step 2, the matrix raw materials required for the single-phase α-type titanium alloy matrix are Ti, Al and Zr; the matrix raw materials required for the α+β-type titanium alloy matrix are Ti, Al and V.

[0025] Preferably, in step 2, the mixing agitator mixes the materials 2 to 5 times, and each mixing time is 2 to 3 minutes.

[0026] Preferably, in the step three, the rod-shaped blanks and the mixed matrix raw material are added to the mold, and the specific adding rules are: first add a layer of matrix raw material to the bottom of the mold, then add a layer of rod-shaped blanks, then add a layer of matrix raw material, and then add a layer of rod-shaped blanks, and repeat this process until the matrix raw material and the rod-shaped blanks are completely added; the number of rod-shaped blanks added to each layer of rod-shaped blanks is two, and the two rod-shaped blanks are respectively close to both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material.

[0027] Preferably, in step three, the electrode block is cylindrical.

[0028] Preferably, in the step 4, the starting conditions for vacuum consumable melting are: vacuum to 0.1-1 Pa, vacuum leakage rate below 0.5 Pa / min, melting current of 0.8-1.2 kA, melting voltage of 25-27 V, arc stabilization current of -6-4 A, and stirring mode of DC; during the vacuum consumable melting process, the vacuum degree is 1.0-10.0 Pa, the melting current is 0.8-1.8 kA, and the melting voltage is 25.0-28.0 V.

[0029] Preferably, in step 4, the cooling time after smelting is completed is not less than 2 hours.

[0030] Preferably, in step 5, the smelting process conditions are: vacuum degree is 10 -4 ~10 -3 Pa, the melting current is 250~300mA.

[0031] Preferably, in step six, the specific process of cyclic heat treatment of the cast high-resistance titanium alloy is: placing the cast high-resistance titanium alloy in a vacuum resistance furnace, heating it to 950-1050°C with the furnace, keeping it warm for 30-50 minutes, then cooling it to 840-880°C with the furnace, keeping it warm for 30-50 minutes, and repeating this cycle multiple times.

[0032] Further preferably, in step six, the specific process of cyclic heat treatment of the cast high-resistance titanium alloy is: placing the cast high-resistance titanium alloy in a vacuum resistance furnace, heating it to 950-1050°C at a rate of 10-20°C / min, keeping it warm for 30-50 minutes, then cooling it to 840-880°C at a rate of 5-10°C / min, keeping it warm for 30-50 minutes, and repeating this cycle 4-9 times.

[0033] Preferably, the resistivity of the high-resistance titanium alloy with uniform resistivity is 1.4 to 5.6 μΩ·m, and the density is 4.23 to 4.64 g / cm 3 .

[0034] Beneficial effects of the present invention:

[0035] The present invention uses Al2O3, SiO2, ZrO2 or SiC ceramic powder as the doping phase and adopts a double vacuum melting method, that is, a combination of vacuum consumable melting and vacuum arc melting, to add it into the alloy, thereby improving the strength of the alloy and significantly increasing the resistivity of the alloy;

[0036] This method uses cyclic heat treatment on a cast high-resistance titanium alloy. Through repeated heating and cooling, the alloy undergoes phase transformation and produces phase fluctuations, achieving uniform distribution of ceramic powder particles and uniform structure within the titanium alloy matrix, thereby improving the resistivity uniformity of the high-resistance titanium alloy. This method is cost-effective and suitable for large-scale industrial application.

[0037] The high-resistance titanium alloy ingot provided by the present invention has uniform composition, high resistivity and controllable cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is the microstructure diagram of the high-resistance titanium alloy prepared in Example 1.

[0039] Figure 2 This is the microstructure diagram of the high-resistance titanium alloy prepared in Example 4. DETAILED DESCRIPTION

[0040] Example 1

[0041] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 1.8% (excluding the Al element in Al2O3), Zr 2.25%, Al2O3 10.5%, and the balance Ti.

[0042] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0043] Step 1: Prepare titanium powder and alumina powder in a mass ratio of 1:2, charge the prepared titanium powder and alumina powder into a mixer, and stir for 5 times until the powders are evenly mixed; place the evenly mixed powder into a rubber sleeve under vacuum protection and seal it; place the powder-filled and sealed rubber sleeve into a cold isostatic pressing device and pressurize it at a pressure of 270 MPa for 18 minutes to press the powder into a high-density rod-shaped blank;

[0044] Step 2: Weigh titanium sponge and aluminum zirconium master alloy according to the ratio, pour them into a mixing mixer and mix them three times for 2 minutes;

[0045] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the rod-shaped blanks and the matrix raw material are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are respectively placed on both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are axially welded in a vacuum welding box;

[0046] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 0.8 kA, the melting voltage to 25 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 3.0 Pa, the melting current is 0.8-1.5 kA, and the melting voltage is 25.0-26.5 V; after the melting is completed, cool it for at least two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0047] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 10 -4Pa, then power on for melting, controlling the current at 270 mA; casting the molten metal into a graphite cold mold; and after cooling, performing surface turning machining to obtain a cast high-resistance titanium alloy;

[0048] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 960°C at a heating rate of 12°C / min, and keep it at that temperature for 35 minutes;

[0049] Step 7: Cool the sample treated in step 6 to 840°C at a cooling rate of 6°C / min and keep it at this temperature for 35 minutes.

[0050] Step 8: Repeat the heating and cooling cycle heat treatment 9 times, taking steps 6 and 7 as one cycle;

[0051] Step nine: heating the sample after the cyclic heat treatment in step eight to 960° C. at a heating rate of 12° C. / min, keeping the temperature for 35 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0052] Resistivity tests were performed on samples taken from five different locations of the as-cast high-resistance titanium alloy prepared in this embodiment, and the resistivities were measured to be 3.854 μΩ·m, 3.872 μΩ·m, 3.923 μΩ·m, 3.905 μΩ·m, and 3.913 μΩ·m, respectively.

[0053] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The measured resistivities were 3.909 μΩ·m, 3.904 μΩ·m, 3.907 μΩ·m, 3.908 μΩ·m, and 3.910 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0054] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.29 g / cm 3 .

[0055] Figure 1 The microstructure diagram of the high resistance titanium alloy obtained in this embodiment is shown in FIG. Figure 1 It can be seen that the microstructure of the high-resistance titanium alloy prepared in this embodiment is an α-lamellar structure.

[0056] Example 2

[0057] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 1.9%, Zr 2.4%, SiO 2 1.5%, and the balance Ti.

[0058] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0059] Step 1: Prepare titanium powder and silicon dioxide powder, wherein the mass ratio of titanium powder to silicon dioxide powder is 1:2.5, and put the prepared titanium powder and silicon dioxide powder into a mixing agitator, and stir twice until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; put the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 240MPa for 15 minutes to press the powder into a high-density rod-shaped blank;

[0060] Step 2: Weigh titanium sponge and aluminum zirconium master alloy according to the ratio, pour them into a mixer and mix them three times, each mixing time is 2 minutes;

[0061] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the rod-shaped blanks and the matrix raw material are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are respectively placed on both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are axially welded in a vacuum welding box;

[0062] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 0.8 kA, the melting voltage to 25 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 5.0 Pa, the melting current is 0.8-1.5 kA, and the melting voltage is 25.0-26.5 V; after the melting is completed, cool it for at least two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0063] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 3×10 -4 Pa, then power on for melting; control the current at 295 mA; cast the molten metal into a graphite cold mold; and after cooling, perform surface turning machining to obtain a cast high-resistance titanium alloy;

[0064] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 950°C at a heating rate of 15°C / min, and keep it at that temperature for 40 minutes;

[0065] Step 7: Cool the sample treated in step 6 to 850°C at a cooling rate of 5°C / min and keep it at that temperature for 40 minutes;

[0066] Step 8: Repeat the heating and cooling cycle heat treatment 8 times, taking steps 6 and 7 as one cycle;

[0067] Step nine: heating the sample after the cyclic heat treatment in step eight to 950° C. at a heating rate of 15° C. / min, keeping the temperature for 40 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0068] Samples were taken from five different locations of the as-cast high-resistance titanium alloy prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 1.439 μΩ·m, 1.413 μΩ·m, 1.458 μΩ·m, 1.434 μΩ·m, and 1.442 μΩ·m, respectively.

[0069] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 1.437 μΩ·m, 1.436 μΩ·m, 1.438 μΩ·m, 1.439 μΩ·m, and 1.438 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0070] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.35 g / cm 3 .

[0071] Example 3

[0072] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 1.9%, Zr 2.4% (excluding the Zr element in ZrO2), ZrO2 5.1%, and the balance Ti.

[0073] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0074] Step 1: Weigh titanium powder and zirconium dioxide powder, wherein the mass ratio of titanium powder to zirconium dioxide powder is 1:1.5, and put the prepared titanium powder and zirconium dioxide powder into a mixer and stir three times until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; place the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 290 MPa for 25 minutes to press the powder into a high-density rod-shaped blank;

[0075] Step 2: Weigh titanium sponge and aluminum zirconium master alloy according to the ratio, pour them into a mixer and mix them 4 times, each mixing time is 3 minutes;

[0076] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the rod-shaped blanks and the matrix raw material are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are respectively placed on both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are axially welded in a vacuum welding box;

[0077] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 0.8 kA, the melting voltage to 27 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 3.0 Pa, the melting current is 0.8-1.7 kA, and the melting voltage is 25.5-28 V; after the melting is completed, cool it for at least two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0078] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 8×10 -4 Pa, then power on for melting; controlling the current at 300 mA; casting the molten metal into a graphite cold mold; and performing surface turning machining after cooling to obtain a cast high-resistance titanium alloy.

[0079] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 980°C at a heating rate of 18°C / min, and keep it at that temperature for 35 minutes;

[0080] Step 7: Cool the sample treated in step 6 to 840°C at a cooling rate of 10°C / min and keep it at this temperature for 35 minutes.

[0081] Step 8: Taking steps 6 and 7 as one cycle, repeat the heating and cooling cycle heat treatment 6 times;

[0082] Step nine: heating the sample after the cyclic heat treatment in step eight to 980° C. at a heating rate of 18° C. / min, keeping the temperature for 35 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0083] Samples were taken from five different parts of the as-cast high-resistance titanium alloy prepared in this example, and resistivity tests were performed. The resistivities were measured to be 2.187 μΩ·m, 2.131 μΩ·m, 2.142 μΩ·m, 2.132 μΩ·m, and 2.128 μΩ·m, respectively.

[0084] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 2.140 μΩ·m, 2.143 μΩ·m, 2.145 μΩ·m, 2.142 μΩ·m, and 2.143 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0085] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.45 g / cm 3 .

[0086] Example 4

[0087] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 2.0%, Zr 2.2%, SiC 7.5%, and the balance Ti.

[0088] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0089] Step 1: Weigh titanium powder and silicon carbide powder, wherein the mass ratio of titanium powder to silicon carbide powder is 1:2; put the prepared titanium powder and silicon carbide powder into a mixer and stir them 4 times until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; place the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 285 MPa for 30 minutes to press the powder into a high-density rod-shaped blank;

[0090] Step 2: Weigh titanium sponge and aluminum zirconium master alloy according to the ratio, pour them into a mixer and mix them 4 times, each mixing time is 2 minutes;

[0091] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the rod-shaped blanks and the matrix raw material are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are respectively placed on both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in a 90°C oven and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are welded axially in a vacuum welding box;

[0092] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 0.8 kA, the melting voltage to 26 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 2.0 Pa, the melting current is 0.9-1.6 kA, and the melting voltage is 25.5-27 V; after the melting is completed, cool it for at least two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0093] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 9×10 -4 Pa, then power on for melting; control the current at 260 mA; cast the molten metal into a graphite cold mold; after cooling, perform surface turning machining to obtain a cast high-resistance titanium alloy;

[0094] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 975°C at a heating rate of 13°C / min, and keep it at that temperature for 45 minutes;

[0095] Step 7: Cool the sample treated in step 6 to 870°C at a cooling rate of 7°C / min and keep it at this temperature for 45 minutes.

[0096] Step 8: Repeat the heating and cooling cycle heat treatment 5 times, taking steps 6 and 7 as one cycle;

[0097] Step nine: heating the sample after the cyclic heat treatment in step eight to 975° C. at a heating rate of 13° C. / min, keeping the temperature for 45 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0098] Samples were taken from five different parts of the as-cast high-resistance titanium alloy prepared in this example, and resistivity tests were performed. The resistivities were measured to be 4.536 μΩ·m, 4.525 μΩ·m, 4.514 μΩ·m, 4.502 μΩ·m, and 4.541 μΩ·m, respectively.

[0099] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 4.522μΩ·m, 4.523μΩ·m, 4.523μΩ·m, 4.521μΩ·m, and 4.524μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0100] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.24 g / cm 3 .

[0101] Figure 2 The microstructure diagram of the high resistance titanium alloy obtained in this embodiment is shown in FIG. Figure 2 It can be seen that the microstructure of the high-resistance titanium alloy obtained in this embodiment consists of α-lamellar structure and TiC particles, and the TiC particles are formed by the reaction of the titanium matrix and silicon carbide.

[0102] Example 5

[0103] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 5.4% (excluding the Al element in Al2O3), V 3.6%, Al2O3 10.5%, and the balance is Ti.

[0104] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0105] Step 1: Weigh titanium powder and alumina powder, wherein the mass ratio of titanium powder to alumina powder is 1:2; put the prepared titanium powder and alumina powder into a mixing agitator and stir for 5 times until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; put the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 265 MPa for 20 minutes to press the powder into a high-density rod-shaped blank;

[0106] Step 2: Weigh titanium sponge, aluminum beans and vanadium particles according to the ratio, pour them into a mixing mixer and mix them three times, each mixing time is 3 minutes;

[0107] Step 3: The rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 are added to a mold and pressed into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material to the mold is as follows: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add another layer of matrix raw material, and repeat this process until the matrix raw material and the rod-shaped blanks are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are placed close to both sides of the mold, and the two rod-shaped blanks on the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are axially welded in a vacuum welding box;

[0108] Step 4: The welded parts of the consumable electrode and the auxiliary electrode in step 3 are loaded into the furnace body of a vacuum consumable melting furnace, titanium sponge is added as an arc starting material at the bottom of the crucible, the vacuum is evacuated to 1 Pa, the vacuum leak rate is below 0.5 Pa / min, and vacuum consumable melting is started; the melting current is set to 0.9 kA, the melting voltage is 25 V, the arc stabilization current is -5 A, and the stirring mode is DC; during the melting process, the vacuum degree is 1.0 Pa, the melting current is 1.2-1.7 kA, and the melting voltage is 25.0-26.0 V; after the melting is completed, the intermediate ingot is cooled for a cooling time of not less than two hours to obtain the intermediate ingot, and the intermediate ingot is subjected to surface turning machine processing;

[0109] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 2×10 -4 Pa, then power on for melting, controlling the current at 275 mA, casting the molten metal into a graphite cold mold, and after cooling, performing surface turning machining to obtain a cast high-resistance titanium alloy;

[0110] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 1010°C at a heating rate of 11°C / min, and keep it at that temperature for 35 minutes;

[0111] Step 7: Cool the sample treated in step 6 to 860°C at a cooling rate of 5°C / min and keep it at this temperature for 35 minutes.

[0112] Step 8: Repeat the heating and cooling cycle heat treatment 7 times, taking steps 6 and 7 as one cycle;

[0113] Step nine: heating the sample after the cyclic heat treatment in step eight to 1010° C. at a heating rate of 11° C. / min, keeping the temperature for 35 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0114] Samples were taken from five different locations of the as-cast high-resistance titanium alloy prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 4.912 μΩ·m, 4.954 μΩ·m, 4.947 μΩ·m, 4.931 μΩ·m, and 4.927 μΩ·m, respectively.

[0115] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 4.937 μΩ·m, 4.934 μΩ·m, 4.937 μΩ·m, 4.938 μΩ·m, and 4.940 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0116] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.41 g / cm 3 .

[0117] Example 6

[0118] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 5.3%, V 3.5%, SiO 2 3.8%, and the balance Ti.

[0119] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0120] Step 1: Weigh titanium powder and silicon dioxide powder, wherein the mass ratio of titanium powder to silicon dioxide powder is 1:2; put the prepared titanium powder and silicon dioxide powder into a mixer and stir twice until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; place the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 280 MPa for 23 minutes to press the powder into a high-density rod-shaped blank;

[0121] Step 2: Weigh titanium sponge, aluminum beans and vanadium particles according to the ratio, pour them into a mixing agitator and mix them twice, each mixing time is 2 minutes;

[0122] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the rod-shaped blanks and the matrix raw material are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are respectively placed on both sides of the mold, and the two rod-shaped blanks on the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are welded axially in a vacuum welding box;

[0123] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 0.9 kA, the melting voltage to 25 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 6.0 Pa, the melting current is 1.0-1.6 kA, and the melting voltage is 25.0-25.5 V; after the melting is completed, cool it for no less than two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0124] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 10 -3 Pa, then power on for melting, controlling the current at 250 mA, casting the molten metal into a graphite cold mold, and after cooling, performing surface turning machining to obtain a cast high-resistance titanium alloy;

[0125] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 1000°C at a heating rate of 13°C / min, and keep it at that temperature for 45 minutes;

[0126] Step 7: Cool the sample treated in step 6 to 845°C at a cooling rate of 6°C / min and keep it at this temperature for 45 minutes.

[0127] Step 8: Repeat the heating and cooling cycle heat treatment 5 times, taking steps 6 and 7 as one cycle;

[0128] Step nine: heating the sample after the cyclic heat treatment in step eight to 1000° C. at a heating rate of 13° C. / min, keeping the temperature for 45 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0129] Samples were taken from five different parts of the as-cast high-resistance titanium alloy prepared in this example, and resistivity tests were performed. The resistivities were measured to be 5.510 μΩ·m, 5.535 μΩ·m, 5.517 μΩ·m, 5.541 μΩ·m, and 5.527 μΩ·m, respectively.

[0130] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 5.533 μΩ·m, 5.534 μΩ·m, 5.534 μΩ·m, 5.531 μΩ·m, and 5.530 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0131] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.23 g / cm 3 .

[0132] Example 7

[0133] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 5.9%, V 3.9%, ZrO2 1.6%, and the balance Ti.

[0134] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0135] Step 1: Weigh titanium powder and zirconium dioxide powder, wherein the mass ratio of titanium powder to zirconium dioxide powder is 1:2; put the prepared titanium powder and zirconium dioxide powder into a mixer and stir twice until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; place the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 290 MPa for 27 minutes to press the powder into a high-density rod-shaped blank;

[0136] Step 2: Weigh titanium sponge, aluminum beans and vanadium particles according to the ratio, pour them into a mixing mixer and mix them 5 times, each mixing time is 2 minutes;

[0137] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the rod-shaped blanks and the matrix raw material are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are respectively placed on both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are axially welded in a vacuum welding box;

[0138] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 1.2 kA, the melting voltage to 26 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 4.0 Pa, the melting current is 0.8-1.8 kA, and the melting voltage is 25.5-26.0 V; after the melting is completed, cool it for at least two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0139] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 4×10 -4 Pa, then power on for melting, controlling the current at 280 mA, casting the molten metal into a graphite cold mold, and after cooling, performing surface turning machining to obtain a cast high-resistance titanium alloy;

[0140] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 1050°C at a heating rate of 18°C / min, and keep it at that temperature for 35 minutes;

[0141] Step 7: Cool the sample treated in step 6 to 880°C at a cooling rate of 10°C / min and keep it at this temperature for 35 minutes.

[0142] Step 8: Repeat the heating and cooling cycle heat treatment 6 times, taking steps 6 and 7 as one cycle;

[0143] Step nine: heating the sample after the cyclic heat treatment in step eight to 1050° C. at a heating rate of 18° C. / min, keeping the temperature for 35 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0144] Samples were taken from five different parts of the as-cast high-resistance titanium alloy prepared in this example, and resistivity tests were performed. The resistivities were measured to be 1.747 μΩ·m, 1.742 μΩ·m, 1.772 μΩ·m, 1.731 μΩ·m, and 1.741 μΩ·m, respectively.

[0145] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity prepared in this embodiment, and resistivity tests were performed. The resistivities were measured to be 1.752 μΩ·m, 1.756 μΩ·m, 1.755 μΩ·m, 1.757 μΩ·m, and 1.753 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0146] The high-resistance titanium alloy with uniform resistivity obtained in this embodiment was subjected to a density test, and its density was measured to be 4.64 g / cm 3 .

[0147] Example 8

[0148] The high-resistance titanium alloy of this embodiment includes the following raw material components by mass percentage: Al 5.7%, V 3.8%, SiC 5.9%, and the balance Ti.

[0149] The preparation of a high-resistance titanium alloy with uniform resistivity in this embodiment includes the following steps:

[0150] Step 1: Weigh titanium powder and silicon carbide powder, wherein the mass ratio of titanium powder to silicon carbide powder is 1:2; put the prepared titanium powder and silicon carbide powder into a mixer and stir several times until the powders are evenly mixed; put the evenly mixed powder into a rubber sleeve under vacuum protection conditions and seal it; place the powder-filled and sealed rubber sleeve into a cold isostatic pressing equipment and pressurize it at a pressure of 260 MPa for 26 minutes to press the powder into a high-density rod-shaped blank;

[0151] Step 2: Weigh titanium sponge, aluminum beans and vanadium particles according to the ratio, pour them into a mixing mixer and mix them 4 times, each mixing time is 3 minutes;

[0152] Step 3: Add the rod-shaped blanks prepared in step 1 and the matrix raw material mixed in step 2 into a mold and press them into cylindrical electrode blocks. The rule for adding the rod-shaped blanks and the matrix raw material into the mold is: first add a layer of matrix raw material, then add a layer of rod-shaped blanks, and then add a layer of matrix raw material, and repeat this process until the matrix raw material and the rod-shaped blanks are completely added. Two rod-shaped blanks are added to each layer of rod-shaped blanks, and the two rod-shaped blanks are placed close to both sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix raw material. A total of 6 electrode blocks are prepared; the electrode blocks are placed in an oven at 90°C and baked for 12 hours; the six dried electrode blocks are axially welded in a vacuum welding box to form a consumable electrode, and the consumable electrode and the auxiliary electrode are axially welded in a vacuum welding box;

[0153] Step 4: Load the welded parts of the consumable electrode and the auxiliary electrode in step 3 into the furnace body of a vacuum consumable melting furnace, add sponge titanium as an arc starting material at the bottom of the crucible, evacuate to 1 Pa, and the vacuum leak rate is below 0.5 Pa / min, and start vacuum consumable melting; set the melting current to 1.2 kA, the melting voltage to 27 V, the arc stabilization current to -5 A, and the stirring mode to DC; during the melting process, the vacuum degree is 10.0 Pa, the melting current is 0.8-1.8 kA, and the melting voltage is 25.5-26.0 V; after the melting is completed, cool it for at least two hours to obtain an intermediate ingot, and perform surface turning on the intermediate ingot;

[0154] Step 5: Add the intermediate ingot processed by the surface turning machine in step 4 into the molten pool of the vacuum arc furnace, turn on the water cooling system, and evacuate to 6×10- 4 Pa, then power on for melting, controlling the current at 295 mA; casting the molten metal into a graphite cold mold, and after cooling, performing surface turning machining to obtain a cast high-resistance titanium alloy;

[0155] Step 6: Place the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heat it to 1030°C at a heating rate of 19°C / min, and keep it at that temperature for 45 minutes;

[0156] Step 7: Cool the sample treated in step 6 to 875°C at a cooling rate of 7°C / min and keep it at this temperature for 45 minutes.

[0157] Step 8: Repeat the heating and cooling cycle heat treatment 8 times, taking steps 6 and 7 as one cycle;

[0158] Step nine: heating the sample after the cyclic heat treatment in step eight to 1030° C. at a heating rate of 19° C. / min, keeping the temperature for 45 minutes, and then cooling the sample in the furnace to obtain the high-resistance titanium alloy with uniform resistivity.

[0159] Samples were taken from five different parts of the as-cast high-resistance titanium alloy prepared in this example, and resistivity tests were performed. The resistivities were measured to be 2.956 μΩ·m, 2.991 μΩ·m, 2.983 μΩ·m, 2.972 μΩ·m, and 2.997 μΩ·m, respectively.

[0160] Samples were taken from five different parts of the high-resistance titanium alloy with uniform resistivity obtained in this embodiment, and resistivity tests were performed. It was found that the measured resistivities were 2.899 μΩ·m, 2.971 μΩ·m, 2.972 μΩ·m, 2.974 μΩ·m, and 2.970 μΩ·m, respectively. The resistivity of the high-resistance titanium alloy is uniform.

[0161] The density of the high-resistance titanium alloy with uniform resistivity obtained in this embodiment was tested and found to be 4.45 g / cm 3 .

Claims

1. A high-resistance titanium alloy with uniform resistivity, characterized in that: The high-resistance titanium alloy uses a single-phase α-type titanium alloy or an α+β-type titanium alloy as a matrix and ceramic powder as a doping phase; when the high-resistance titanium alloy uses a single-phase α-type titanium alloy as a matrix, the high-resistance titanium alloy includes the following raw material components by mass percentage: Al 1.8%-2.0%, Zr 2.2%-2.4%, ceramic powder 1.5%-10.5%, and the balance is Ti; when the high-resistance titanium alloy uses an α+β-type titanium alloy as a matrix, the high-resistance titanium alloy includes the following raw material components by mass percentage: Al 5.3%-5.9%, V 3.5%-3.9%, ceramic powder 1.6%-10.5%, and the balance is Ti; The high-resistance titanium alloy with uniform resistivity is prepared by a preparation method comprising the following steps: Step 1: Titanium powder and ceramic powder are weighed according to the ratio, and the mixed titanium powder and ceramic powder are charged into a mixer and stirred several times until the powders are evenly mixed. The evenly mixed powders are then placed into a rubber sleeve under vacuum protection and sealed. The sealed rubber sleeve is then placed in a cold isostatic pressing device and pressurized to press the powders into a high-density rod-shaped blank. Step 2: Weighing the matrix raw materials required for the single-phase α-type titanium alloy matrix or the α+β-type titanium alloy matrix according to the proportion, mixing and stirring the prepared matrix raw materials multiple times to obtain a mixed matrix raw material; Step 3: The rod-shaped blank obtained in step 1 and the matrix material obtained by mixing in step 2 are added into a mold and pressed into a plurality of electrode blocks. The plurality of electrode blocks are then welded axially in a vacuum welding box to form a consumable electrode. The consumable electrode and the auxiliary electrode are then welded axially in a vacuum welding box to obtain a welded part of the consumable electrode and the auxiliary electrode. Step 4: The welded parts of the consumable electrode and the auxiliary electrode in step 3 are loaded into the furnace body of a vacuum consumable melting furnace, arc starting material is added to the bottom of the crucible, vacuum consumable melting is performed, and after the melting is completed, the intermediate ingot is cooled to obtain a surface turning machine processing of the intermediate ingot to obtain an intermediate ingot with a good surface; Step 5: The intermediate ingot with a good surface obtained in step 4 is added to the molten pool of the vacuum arc furnace, the water cooling system is turned on, the vacuum is evacuated, and then the molten metal after smelting is cast into a graphite cold mold, and the surface is turned on the lathe after cooling to obtain a cast high-resistance titanium alloy with a good surface; Step 6: The as-cast high-resistance titanium alloy obtained in step 5 is placed in a vacuum resistance furnace for cyclic heat treatment, then kept at 950-1050° C. for 30-50 minutes, and cooled with the furnace to obtain the high-resistance titanium alloy with uniform resistivity; In step six, the specific process of cyclic heat treatment of the as-cast high-resistance titanium alloy is as follows: placing the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heating it to 950-1050°C at a rate of 10-20°C / min, keeping it warm for 30-50 minutes, then cooling it to 840-880°C at a rate of 5-10°C / min, keeping it warm for 30-50 minutes, and repeating this cycle 4-9 times.

2. The high-resistance titanium alloy with uniform resistivity according to claim 1, characterized in that The ceramic powder is any one of Al2O3, SiO2, ZrO2, and SiC.

3. A method for preparing a high-resistance titanium alloy with uniform resistivity according to claim 1 or 2, comprising the following steps: Step 1: Titanium powder and ceramic powder are weighed according to the ratio, and the mixed titanium powder and ceramic powder are charged into a mixer and stirred several times until the powders are evenly mixed. The evenly mixed powders are then placed into a rubber sleeve under vacuum protection and sealed. The sealed rubber sleeve is then placed in a cold isostatic pressing device and pressurized to press the powders into a high-density rod-shaped blank. Step 2: Weighing the matrix raw materials required for the single-phase α-type titanium alloy matrix or the α+β-type titanium alloy matrix according to the proportion, mixing and stirring the prepared matrix raw materials multiple times to obtain a mixed matrix raw material; Step 3: The rod-shaped blank obtained in step 1 and the matrix material obtained by mixing in step 2 are added into a mold and pressed into a plurality of electrode blocks. The plurality of electrode blocks are then welded axially in a vacuum welding box to form a consumable electrode. The consumable electrode and the auxiliary electrode are then welded axially in a vacuum welding box to obtain a welded part of the consumable electrode and the auxiliary electrode. Step 4: The welded parts of the consumable electrode and the auxiliary electrode in step 3 are loaded into the furnace body of a vacuum consumable melting furnace, arc starting material is added to the bottom of the crucible, vacuum consumable melting is performed, and after the melting is completed, the intermediate ingot is cooled to obtain a surface turning machine processing of the intermediate ingot to obtain an intermediate ingot with a good surface; Step 5: The intermediate ingot with a good surface obtained in step 4 is added to the molten pool of the vacuum arc furnace, the water cooling system is turned on, the vacuum is evacuated, and then the molten metal after smelting is cast into a graphite cold mold, and the surface is turned on the lathe after cooling to obtain a cast high-resistance titanium alloy with a good surface; Step 6: The as-cast high-resistance titanium alloy obtained in step 5 is placed in a vacuum resistance furnace for cyclic heat treatment, then kept at 950-1050° C. for 30-50 minutes, and cooled with the furnace to obtain the high-resistance titanium alloy with uniform resistivity; In step 3, the rod-shaped blanks and the mixed matrix material are added to the mold. The specific addition rules are as follows: first add a layer of matrix material to the bottom of the mold, then add a layer of rod-shaped blanks, then add a layer of matrix material, and then add a layer of rod-shaped blanks, and repeat this process until the matrix material and rod-shaped blanks are completely added; the number of rod-shaped blanks added to each layer is two, and the two rod-shaped blanks are respectively placed close to the two sides of the mold, and the two rod-shaped blanks in the same layer are separated by the matrix material; in step 3, the electrode block is cylindrical; In step six, the specific process of cyclic heat treatment of the as-cast high-resistance titanium alloy is as follows: placing the as-cast high-resistance titanium alloy in a vacuum resistance furnace, heating it to 950-1050°C at a rate of 10-20°C / min, keeping it warm for 30-50 minutes, then cooling it to 840-880°C at a rate of 5-10°C / min, keeping it warm for 30-50 minutes, and repeating this cycle 4-9 times.

4. The preparation method according to claim 3, characterized in that In the step 1, the mass ratio of titanium powder to ceramic powder is 1:(1.5-2.5); the prepared titanium powder and ceramic powder are added into a mixer and stirred and mixed 2-5 times, with each mixing time being 2-3 minutes; the rubber sleeve is cylindrical and has a length of 18-22 cm. The cold isostatic pressing pressure is between 200-300 MPa, and the holding time is 15-30 minutes.

5. The preparation method according to claim 3, characterized in that In the step 2, the matrix raw materials required for the single-phase α-type titanium alloy matrix are Ti, Al and Zr; the matrix raw materials required for the α+β-type titanium alloy matrix are Ti, Al and V; the mixing stirrer in the step 2 mixes 2 to 5 times, and the mixing time each time is 2 to 3 minutes.

6. The preparation method according to claim 3, characterized in that In the step 4, the starting conditions for the vacuum consumable melting are: vacuum to 0.1~1Pa, vacuum leak rate below 0.5Pa / min, melting current of 0.8~1.2kA, melting voltage of 25~27V, arc stabilization current of -6~-4A, and stirring mode of DC; during the vacuum consumable melting process, the vacuum degree is 1.0~10.0Pa, the melting current is 0.8~1.8kA, and the melting voltage is 25.0~28.0V; in the step 4, the cooling time after the melting is completed is not less than 2h.

7. The preparation method according to claim 3, characterized in that In the step 5, the smelting process conditions are: vacuum degree is 10 -4 ~10 -3 Pa, melting current is 250~300mA.

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