Corrosion and wear resistant Ti-Zr alloy and method of making same

Abstract

The application discloses a kind of Ti-Zr alloys of corrosion resistance and wear resistance, including matrix and oxide layer, the matrix is by mass percentage, component is: Ti 30%~42.5%, Zr 57%~69.7%, O 0.3~0.8%;The oxide layer is ZrTiO X Wherein x is 3~4, the microstructure of its matrix is the interlaced distribution of submicron strip-shaped alpha phase and nanometer needle-shaped martensitic alpha' phase containing high-density dislocation substructure.The application also provides a preparation method of the above-mentioned Ti-Zr alloy with corrosion resistance and wear resistance.The alloy prepared by the method has excellent wear resistance and corrosion resistance, and the production cost is significantly reduced.The product prepared by the alloy has strong service stability and is widely used.

Description

Technical Field

[0001] This invention belongs to the field of alloy technology, specifically relating to a corrosion-resistant and wear-resistant Ti-Zr alloy and its preparation method. Background Technology

[0002] Titanium, zirconium, and their alloys hold a vital position in high-end industrial fields due to their excellent specific strength and corrosion resistance. However, with the rapid development of deep-sea equipment, offshore platforms, advanced chemical engineering, and nuclear energy, the service environments faced by engineering components are becoming increasingly harsh: materials must not only possess high strength and toughness to withstand complex stresses, but also resist corrosion from high-pressure seawater, high-concentration chloride ions, sulfide media, and severe erosion and wear caused by silt and particulate matter. This extreme working condition, involving the coupling of multiple factors of "mechanics-chemistry-wear," poses unprecedented challenges to existing material systems.

[0003] Existing solutions either improve corrosion resistance by adding precious metal elements such as Nb, V, and Ta, leading to a surge in material costs; or they use a single strengthening process to optimize mechanical properties, but it is difficult to achieve a synergistic improvement in wear resistance and corrosion resistance.

[0004] To address this technological bottleneck, developing a titanium-zirconium-based alloy that combines high strength, high toughness, high wear resistance, high corrosion resistance, and controllable cost has become an urgent task to meet the upgrading needs of the high-end equipment field. Summary of the Invention

[0005] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a corrosion-resistant and wear-resistant Ti-Zr alloy, comprising a matrix and an oxide layer. The matrix, by mass percentage, comprises: Ti 30%–42.5%, Zr 57%–69.7%, and O 0.3%–0.8%. The oxide layer is ZrTiO₂. X , where x is 3 to 4.

[0006] Preferably, the microstructure of the matrix consists of an interwoven submicron-scale lath-like α phase and a nano-scale needle-like martensite α' phase containing a high-density dislocation substructure.

[0007] Oxygen is interstitially dissolved and combined with Ti and Zr (57%–69.7% zirconium-rich) to form a high-density dislocation substructure in the microstructure, consisting of lath-like α-phase and acicular martensite α' phase. This high-density dislocation substructure is a pinned structure where oxygen atoms are locked around dislocation lines. The numerous phase interfaces and dislocation barriers between the submicron-sized α-phase and the nano-sized α' phase significantly hinder dislocation movement, thereby increasing the yield strength and tensile strength of the material. Simultaneously, the refined lamellar structure disperses deformation and increases the tortuosity of crack propagation paths, enabling the alloy of this invention to maintain high strength while also possessing good plasticity and toughness.

[0008] Preferably, the width of the submicron-scale lath-like α phase is 200~300nm, and the width of the nanoscale needle-like martensite α' phase is 50~100nm.

[0009] Preferably, the Ti-Zr alloy has a room temperature tensile strength of 1000~1500MPa, an elongation of 5%~15%, and a surface hardness of 1000~1356HV.

[0010] Another object of the present invention is to provide a method for preparing the above-mentioned corrosion-resistant and wear-resistant Ti-Zr alloy, comprising the following steps:

[0011] ① Titanium, zirconium and titanium dioxide raw materials are mixed according to the composition ratio of the matrix in the corrosion-resistant and wear-resistant Ti-Zr alloy, pressed into electrodes, and obtained ingots by vacuum consumable melting;

[0012] ② The ingot is machined, forged, and rolled, wherein the forging temperature is 900℃~1100℃, the rolling temperature is 750℃~900℃, and the rolling reduction is 85%~90%;

[0013] ③ Soluble at 450℃~750℃ for 1~3 hours, then quench in water at a cooling rate of 110~130℃ / s;

[0014] ④ After heating to 300℃~550℃ in an oxygen-containing atmosphere for 2~7 hours, the corrosion-resistant and wear-resistant Ti-Zr alloy is obtained.

[0015] Preferably, the specific steps of pressing the electrode are as follows: first, titanium is laid on the bottom of the mold to form bottom titanium; zirconium, titanium dioxide and titanium are mixed evenly to form an intermediate mixture and laid on the middle layer; finally, titanium is laid on the top to form top titanium. The mass ratio of bottom titanium, intermediate mixture and top titanium is 2:6:2. The bottom titanium, intermediate mixture and top titanium are pressed into an electrode.

[0016] Preferably, the vacuum degree of the vacuum self-consumable melting in step ① is 0.1~10 Pa, and the number of vacuum self-consumable melting cycles is 2~3.

[0017] Preferably, the oxygen content of the oxygen-containing atmosphere is 30~40 vol.%.

[0018] Beneficial effects of this invention:

[0019] 1. Synergistic improvement in mechanical properties. Through interstitial solid solution strengthening with oxygen elements, a composite microstructure of submicron-sized lath-like α-phase and nano-sized acicular martensitic α' phase achieves a balance between high strength and good plasticity. The room temperature tensile strength can reach 1000~1500MPa, and the yield strength at 400℃ still remains above 800MPa; the elongation is maintained at 5%~15%, which not only meets the load-bearing requirements of structural components, but also has good processability, and can be directly processed into bolts, valves and other parts.

[0020] 2. Excellent wear and corrosion resistance. ZrTiO₂ formed in situ on the alloy surface... X (x=3~4) The oxide layer is dense and has strong adhesion to the substrate, with a Vickers hardness exceeding 1000 HV, effectively resisting erosion and wear. In simulated polluted seawater tests, the annual corrosion rate is less than 11 μm / a, with no obvious pitting corrosion; the sliding friction coefficient is not higher than 0.20, and the volumetric wear rate is ≤5.0×10⁻⁶. -6 mm 3 / (N·m), in Cl - S 2- It performs exceptionally well in harsh media.

[0021] 3. Significantly reduced production costs. The alloy composition contains only three inexpensive elements: Ti, Zr, and O, eliminating the need for the addition of precious or rare metals; the requirements for oxygen content control are relaxed (0.1%~0.8%), and the raw material and preparation costs are reduced by more than 30% compared to alloys of the same strength level, making it a potential candidate for large-scale industrial applications.

[0022] 4. Strong service stability. The high-density dislocation network not only strengthens the matrix but also provides channels for oxygen atom diffusion, enabling the oxide layer to form a strong metallurgical bond with the matrix, avoiding coating peeling during service, and adapting to the service requirements of multiple scenarios.

[0023] 5. Wide range of applications. With its comprehensive advantages of high strength, wear resistance, corrosion resistance and low cost, it can be widely used in shipbuilding, offshore platforms, chemical industry, aerospace and other fields. It is especially suitable for key structural components such as fasteners, valves and bearings, which can significantly improve the reliability and service life of equipment. Attached Figure Description

[0024] Figure 1 Transmission microstructure of the alloy matrix prepared in Example 1;

[0025] Figure 2 Scanning electron microscope image of the cross section of the alloy prepared in Example 1;

[0026] Figure 3 A photograph of a marine propeller fastener manufactured using the alloy of Example 3. Detailed Implementation

[0027] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0028] In the embodiments of the present invention, the titanium used is sponge titanium particles with a purity of 99.9%; the zirconium is sponge zirconium with a purity of 99.9%; and the titanium dioxide is titanium dioxide particles.

[0029] The specific steps for pressing the electrode in the embodiment are as follows: First, titanium is laid at the bottom of the mold to form bottom titanium. Zirconium, titanium dioxide and titanium are mixed evenly to form an intermediate mixture and laid in the middle layer. Finally, titanium is laid on top to form top titanium. The mass ratio of bottom titanium, intermediate mixture and top titanium is 2:6:2. The bottom titanium, intermediate mixture and top titanium are pressed into an integral electrode.

[0030] Example 1

[0031] ① The electrodes were pressed according to the following mass percentages: Ti 40.2%, Zr 59.4%, O 0.40%. The pressed electrodes were then melted three times in a vacuum arc furnace to obtain an alloy ingot. The vacuum degree of the melting process was 0.1 Pa.

[0032] ② The alloy ingot is machined, including peeling, removing risers and tail sections, followed by forging at 950℃ to form a bar. The surface is then peeled, oxide scale and segregation layers are removed, and the corners are rounded. Finally, a rolling process is used, with a single-pass reduction of 17% and a cumulative reduction of 85%. The initial rolling temperature is controlled at 850℃, and the final rolling temperature is controlled at 750℃. During rolling, intermediate reheating is performed based on temperature drop to ensure uniform deformation. After rolling, the bar is air-cooled to room temperature to obtain a uniformly structured rolled bar.

[0033] ③ The bar stock is solution treated at 550℃ for 1 hour, and then rapidly immersed in circulating cooling water for rapid quenching, with the cooling rate controlled at approximately 120℃ / s;

[0034] ④ The water-quenched bar was heated at 300℃ for 5 hours in an oxygen-containing atmosphere, with an oxygen content of 40 vol.%, to obtain a corrosion-resistant and wear-resistant Ti-Zr alloy.

[0035] The alloy matrix prepared in Example 1, by mass percentage, consisted of: Ti 40.2%, Zr 59.4%, and O 0.40%; the oxide layer was ZrTiO. X , where x is 4.

[0036] The tensile testing method refers to GB / T 228.1-2021, and the hardness testing method refers to GB / T 4340.1-2024. The alloy has a room temperature tensile strength of 1214 MPa, an elongation of 8.5%, and a surface hardness of 1325 HV.

[0037] (a) The microstructure of the prepared alloy matrix was observed using a transmission electron microscope (JEM2100), and the results are as follows: Figure 1 As shown, the internal structure of the alloy consists of a large amount of α' martensite phase, α phase, and a high-density dislocation substructure, which is a pinned structure formed by oxygen atoms being locked around dislocation lines. From Figure 1 It can be seen that the lath-like α phase is submicron in size and 200-300 nm wide, while the acicular martensite α' phase is nanoscale in size and 50-100 nm wide.

[0038] (ii) The obtained alloy was cut into sections and samples were prepared. The cross-section of the alloy was observed using a scanning electron microscope (Sigma360). The results are as follows: Figure 2 As shown. From Figure 2 It can be seen that the oxide layer is located on top of the substrate layer, and the thickness of the oxide layer is about 10 μm.

[0039] (III) Preparation of corrosion resistance test samples: Cut the alloy obtained in the example into thin slices with a size of 10mm×10mm×5mm, smooth them with sandpaper and polish them until there are no scratches.

[0040] Electrochemical corrosion tests were conducted in a polluted seawater solution, following the potentiodynamic polarization test method specified in GB / T 17848-1999. The sample served as the working electrode, a saturated calomel electrode as the reference electrode, and a platinum sheet as the counter electrode, forming a three-electrode test system. Polarization curves were measured at room temperature. The polluted seawater solution consisted of 0.05% Na₂S and 3.5% NaCl by mass, with the remainder being deionized water. The corrosion current density was calculated from the polarization curves, yielding an annual corrosion rate of 0.5 μm / a.

[0041] Microbial corrosion electrochemical tests were conducted in a simulated seawater culture medium containing *Pseudomonas aeruginosa*, following the experimental method specified in GB / T 17848-1999. The sample was used as the working electrode, a saturated calomel electrode as the reference electrode, and a platinum sheet as the counter electrode, forming a three-electrode test system. *Pseudomonas aeruginosa* was inoculated into the simulated seawater culture medium, and the experimental temperature was controlled at 25±1℃. The sample was immersed for 30 days, during which the polarization curve and corrosion current density changes were monitored periodically. The annual corrosion rate was calculated to be 2.8 μm / a using the corrosion rate conversion formula. After the test, the sample surface was cleaned and observed under a scanning electron microscope; no obvious pitting corrosion was found.

[0042] The simulated seawater culture medium containing Pseudomonas aeruginosa consisted of the following components by mass percentage: 5.0 g / L peptone, 1.0 g / L yeast extract, 0.1 g / L FeC6H5O7, 19.45 g / L NaCl, 5.98 g / L MgCl2, 3.24 g / L Na2SO4, 1.8 g / L CaCl2, 0.55 g / L KCl, 0.16 g / L Na2CO3, 0.08 g / L KBr, 0.034 g / L SrCl2, 0.022 g / L H3BO3, 0.004 g / L Na2SiO3, 0.0024 g / L NaF, 0.0016 g / L NaNO3, and 0.008 g / L Na2HPO4.

[0043] (iv) The sliding friction and wear test was conducted in accordance with GB / T 12444-2006, using a pin-disc friction and wear testing machine for dry sliding wear testing. The test results showed that the average friction coefficient of the alloy was 0.18, and the volumetric wear rate was 3.0 × 10⁻⁶. -6 mm³ / (N·m).

[0044] Example 2

[0045] ①Electrodes were prepared according to the ratio of Ti 42.5%, Zr 57.0% and O 0.5%. The pressed electrodes were melted twice in a vacuum arc remelting furnace to obtain alloy ingots. The vacuum degree of the vacuum arc remelting furnace was 5 Pa.

[0046] ② The alloy ingot is machined, including peeling, removing risers and tail sections, followed by forging at 1000℃ to form a bar. The surface is then peeled, oxide scale and segregation layers are removed, and the corners are rounded. Finally, a rolling process is used, with a single-pass reduction of 16% and a cumulative reduction of 85%. The initial rolling temperature is controlled at 750℃, and the final rolling temperature is also controlled at 750℃. During rolling, intermediate reheating is performed based on temperature drop to ensure uniform deformation. After rolling, the bar is air-cooled to room temperature to obtain a uniformly structured rolled bar.

[0047] ③ The bar stock is solution treated at 650℃ for 2 hours, and then rapidly immersed in circulating cooling water for rapid quenching, with the cooling rate controlled at approximately 110℃ / s;

[0048] ④ The water-quenched bar was heated at 500℃ for 4 hours in an oxygen-containing atmosphere with an oxygen content of 30 vol.% to obtain a corrosion-resistant and wear-resistant Ti-Zr alloy.

[0049] The alloy matrix prepared in Example 2, by mass percentage, contains 42.5% Ti, 57.0% Zr, and 0.5% O; the oxide layer is ZrTiO. X , where x is 3.

[0050] The alloy obtained in Example 2 was processed into tensile specimens. Its high-temperature mechanical properties were tested at room temperature, 300℃, 400℃, 500℃ and 550℃. The yield strength, tensile strength and elongation after fracture data are listed in Table 1.

[0051] 1. Electrochemical corrosion tests were conducted in simulated polluted seawater solution, with an annual corrosion rate of 0.43 μm / a;

[0052] 2. Sliding friction and wear tests were conducted, and the results showed an average friction coefficient of 0.17 and a volumetric wear rate of 2.2 × 10⁻⁶. -6 mm 3 / (N·m);

[0053] 3. No pitting corrosion was observed after immersion in simulated seawater culture medium containing Pseudomonas aeruginosa for 30 days;

[0054] 4. In a simulated seawater culture medium containing Pseudomonas aeruginosa, the annual corrosion rate was 2.5 μm / a according to the electrochemical corrosion test.

[0055] Example 3

[0056] ① The electrode was prepared according to the ratio of Ti 30%, Zr 69.7% and O 0.3%. The pressed electrode was melted twice in a vacuum arc furnace to obtain an alloy ingot. The vacuum degree of the melting was 10 Pa.

[0057] ② The alloy ingot is machined, including peeling, removing risers and tail sections, followed by forging at 1100℃ to form a bar. The surface is then peeled, oxide scale and segregation layers are removed, and the corners are rounded. Finally, a rolling process is used, with a single-pass reduction of 15% and a cumulative reduction of 90%. The initial rolling temperature is controlled at 900℃, and the final rolling temperature is controlled at 850℃. During rolling, intermediate reheating is performed based on temperature drop to ensure uniform deformation. After rolling, the bar is air-cooled to room temperature to obtain a uniformly structured rolled bar.

[0058] ③ The bar stock is solution treated at 750℃ for 1 hour, and then rapidly immersed in circulating cooling water for rapid quenching, with the cooling rate controlled at approximately 124℃ / s;

[0059] ④ The water-quenched bar was heated at 550℃ for 2 hours in an oxygen-containing atmosphere, with an oxygen content of 35 vol.%, to obtain a corrosion-resistant and wear-resistant Ti-Zr alloy.

[0060] The alloy matrix prepared in Example 3, by mass percentage, contains 30% Ti, 69.7% Zr, and 0.3% O; the oxide layer is ZrTiO. X , where x is 4.

[0061] The room temperature tensile strength is 1235 MPa, the elongation is 6.2%, and the surface hardness is 1247 HV.

[0062] 1. Electrochemical corrosion tests were conducted in simulated polluted seawater solution, with an annual corrosion rate of 0.5 μm / a;

[0063] 2. Sliding friction and wear tests were conducted, and the results showed an average friction coefficient of 0.19 and a volumetric wear rate of 2.5 × 10⁻⁶. -6 mm 3 / (N·m);

[0064] 3. No pitting corrosion was observed after immersion in simulated seawater culture medium containing Pseudomonas aeruginosa for 30 days;

[0065] 4. An annual corrosion rate of 2.6 μm / a was obtained from an electrochemical corrosion test conducted in a simulated seawater culture medium containing Pseudomonas aeruginosa.

[0066] Example 4

[0067] ① The electrode was prepared according to the ratio of Ti 39.2%, Zr 60% and O 0.8%. The pressed electrode was melted twice in a vacuum arc furnace to obtain an alloy ingot. The vacuum degree of the melting was 0.1 Pa.

[0068] ② The alloy ingot is machined, including peeling, removing risers and tail sections, followed by forging at 900℃ to form a bar. The surface is then peeled to remove oxide scale and segregation layers, and the corners are rounded. Finally, a rolling process is used, with a single-pass reduction of 15% and a cumulative reduction of 90%. The initial rolling temperature is controlled at 860℃, and the final rolling temperature is controlled at 800℃. During rolling, intermediate reheating is performed based on temperature drop to ensure uniform deformation. After rolling, the bar is air-cooled to room temperature to obtain a uniformly structured rolled bar.

[0069] ③ The bar stock is solution treated at 450℃ for 1.5 hours, and then rapidly immersed in circulating cooling water for rapid quenching, with the cooling rate controlled at approximately 130℃ / s;

[0070] ④ The water-quenched bar was heated at 480℃ for 7 hours in an oxygen-containing atmosphere with an oxygen content of 30 vol.% to obtain a corrosion-resistant and wear-resistant Ti-Zr alloy.

[0071] The alloy matrix prepared in Example 4, by mass percentage, contains 39.2% Ti, 60% Zr, and 0.8% O; the oxide layer is ZrTiO. X， Where x is 3.5. The room temperature tensile strength is 1279 MPa, the elongation is 6.8%, and the surface hardness is 1306 HV.

[0072] 1. Electrochemical corrosion tests were conducted in simulated polluted seawater solution, with an annual corrosion rate of 0.5 μm / a;

[0073] 2. Sliding friction and wear tests were conducted, with an average friction coefficient of 0.15 and a volumetric wear rate of 2.1 × 10⁻⁶. -6 mm 3 / (N·m).

[0074] 3. No pitting corrosion was observed after immersion in simulated seawater culture medium containing Pseudomonas aeruginosa for 30 days;

[0075] 4. An annual corrosion rate of 2.3 μm / a was obtained from an electrochemical corrosion test conducted in a simulated seawater culture medium containing Pseudomonas aeruginosa.

[0076] Example 5

[0077] The alloy from Example 3 was used to make propeller bolts for ships. Figure 3 This is a photograph of a marine propeller fastener made of this alloy. It demonstrates that this alloy has excellent hot and cold working properties.

[0078] The bolt's threads are clear and free of cracks, confirming that the alloy still maintains sufficient toughness and machinability even under high oxygen content.

[0079] Its surface hardness can reach over 1000 HV, and in sliding friction and wear tests, the average coefficient of friction is no higher than 0.20, and the volumetric wear rate is less than 5.0 × 10⁻⁶. -6 The temperature and humidity of the bolt are 30 mm³ / (N·m), which gives the bolt excellent anti-seize performance and wear and corrosion resistance during service and assembly.

[0080] Comparative Example 1

[0081] The other steps are the same as in Example 1, but this comparative example did not undergo water quenching and step ④ treatment. The microhardness test of the sample was carried out in accordance with GB / T 4340.1-2024, and its microhardness was tested to be 237 HV, which is much lower than the hardness of the alloys in other examples.

[0082] Comparative Example 2

[0083] A low-oxygen-content titanium-zirconium alloy material, with other steps as in Example 2, except that the alloy composition is different, and by mass percentage: Ti 41.7%, Zr 58.2%, O 0.065%.

[0084] The mechanical properties were tested at room temperature, 300℃, 400℃, 500℃, and 550℃. The experimental data for yield strength, tensile strength, and elongation are shown in Table 1. The high-density dislocation substructure is a pinned structure formed by oxygen atoms locked around dislocation lines. When the oxygen content in the alloy is extremely low, the number of oxygen atoms available for segregation is severely insufficient. This leads to a reduction in the number of pinning points per unit length of dislocation line. The stress required for dislocations to detach from the pinning points (unpinning) is significantly reduced; therefore, the alloy in Comparative Example 2 has poor strength, as shown in Table 1.

[0085] Table 1 Comparison of mechanical properties of Example 2 and Comparative Example 2 at room temperature and high temperature

[0086]

[0087] Comparative Example 3

[0088] The other steps are the same as in Example 3, except that the alloy matrix composition is different. Specifically, the composition by mass percentage is Ti 79.7%, Zr 20%, and O 0.3%. The testing method is the same as in the previous examples. At room temperature, the alloy has a tensile strength of 950 MPa, a yield strength of 835 MPa, and an elongation of 14.2%. Its performance parameters are much lower than those of Example 3.

[0089] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A corrosion-resistant and wear-resistant Ti-Zr alloy, characterized in that, It includes a substrate and an oxide layer. The substrate, by mass percentage, comprises: Ti 30%–42.5%, Zr 57%–69.7%, and O 0.3%–0.8%. The oxide layer is ZrTiO. X , where x is 3 to 4; The microstructure of the matrix consists of an interwoven submicron-scale lath-like α phase and a nano-scale needle-like martensite α' phase containing a high-density dislocation substructure. The width of the submicron-scale lath-like α phase is 200~300nm, and the width of the nanoscale needle-like martensite α' phase is 50~100nm. The method for preparing the corrosion-resistant and wear-resistant Ti-Zr alloy includes the following steps: ① Titanium, zirconium and titanium dioxide raw materials are mixed according to the composition ratio of the matrix, pressed into electrodes, and then obtained as ingots by vacuum consumable melting; ② The ingot is machined, forged, and rolled, wherein the forging temperature is 900℃~1100℃, the rolling temperature is 750℃~900℃, and the rolling reduction is 85%~90%; ③ Soluble at 450℃~750℃ for 1~3 hours, then quench in water at a cooling rate of 110~130℃ / s; ④ After heating to 300℃~550℃ in an oxygen-containing atmosphere for 2~7 hours, the corrosion-resistant and wear-resistant Ti-Zr alloy is obtained; the oxygen content of the oxygen-containing atmosphere is 30~40 vol.%.

2. The corrosion-resistant and wear-resistant Ti-Zr alloy according to claim 1, characterized in that, The Ti-Zr alloy has a room temperature tensile strength of 1000~1500MPa, an elongation of 5%~15%, and a surface hardness of 1000~1356HV.

3. A method for preparing the corrosion-resistant and wear-resistant Ti-Zr alloy according to any one of claims 1-2, characterized in that, Includes the following steps: ① Titanium, zirconium and titanium dioxide raw materials are mixed according to the composition ratio of the matrix in the corrosion-resistant and wear-resistant Ti-Zr alloy as described in claim 1, pressed into electrodes, and obtained ingots by vacuum consumable melting; ② The ingot is machined, forged, and rolled, wherein the forging temperature is 900℃~1100℃, the rolling temperature is 750℃~900℃, and the rolling reduction is 85%~90%; ③ Soluble at 450℃~750℃ for 1~3 hours, then quench in water at a cooling rate of 110~130℃ / s; ④ After heating to 300℃~550℃ in an oxygen-containing atmosphere for 2~7h, the corrosion-resistant and wear-resistant Ti-Zr alloy as described in claim 1 is obtained; the oxygen content of the oxygen-containing atmosphere is 30~40 vol.%.

4. The method for preparing the corrosion-resistant and wear-resistant Ti-Zr alloy according to claim 3, characterized in that, The specific steps for pressing the electrode are as follows: First, titanium is laid at the bottom of the mold to form bottom titanium. Zirconium, titanium dioxide and titanium are mixed evenly to form an intermediate mixture and laid in the middle layer. Finally, titanium is laid on top to form top titanium. The mass ratio of bottom titanium, intermediate mixture and top titanium is 2:6:

2. The bottom titanium, intermediate mixture and top titanium are pressed into an electrode.

5. The method for preparing the corrosion-resistant and wear-resistant Ti-Zr alloy according to claim 3, characterized in that, The vacuum degree of the vacuum self-consumption melting described in step ① is 0.1 to 10 Pa, and the number of vacuum self-consumption melting cycles is 2 to 3.

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