Preparation method of vanadium-aluminum-tin-chromium intermediate alloy for titanium alloy preparation

Abstract

The invention relates to the technical field of preparation of vanadium-aluminum-tin-chromium intermediate alloys, and discloses a preparation method of a vanadium-aluminum-tin-chromium intermediate alloy for titanium alloy preparation, which comprises the following steps: raw material preparation: preparing vanadium, aluminum, tin and chromium with the purity of 99.9%, in the smelting process, the prepared vanadium, aluminum, tin and chromium are sequentially loaded into a vacuum induction smelting furnace through the vacuum induction smelting furnace, casting is conducted, alloy liquid in the step S2 is poured into a vacuum casting machine through the vacuum casting machine, and heat treatment is conducted, specifically, a casting in the step S3 is heated through a high-temperature furnace; surface treatment is conducted, specifically, the casting subjected to heat treatment in the step S4 is ground, polished and cleaned; through the operation of fixed-proportion preparation, the preparation of the specific vanadium-aluminum-tin-chromium intermediate alloy can be customized, and the flexibility of the method is improved, so that the performance and the application effect of the alloy are improved, the production cost and the quality control difficulty are reduced, and the reliability and the market competitiveness of the product are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of vanadium-aluminum-tin-chromium master alloys, in particular to a method for preparing a vanadium-aluminum-tin-chromium master alloy used for preparing titanium alloys. Background Art

[0002] Vanadium-aluminum-tin-chromium master alloy is a specially designed alloy, which is usually used as an additive in the preparation of titanium alloys to optimize the mechanical properties, thermal stability and corrosion resistance of titanium alloys. In the field of high-performance engineering materials, the strength and toughness of titanium alloys are significantly improved by adding vanadium and aluminum elements, so that they can still maintain excellent mechanical properties in high stress environments.

[0003] The traditional method for preparing vanadium-aluminum-tin-chromium master alloy is to prepare vanadium, aluminum, tin, chromium and other elements, mix and melt the raw materials in a high-purity inert atmosphere, and cast the molten alloy into a prefabricated mold through vacuum casting or induction melting technology to form the required shape and size. The cast alloy is subjected to solid solution treatment and aging treatment, followed by chemical composition analysis and mechanical property testing. Finally, the qualified products are packaged in moisture-proof and anti-oxidation packaging and stored in a suitable environment to ensure their long-term stability. However, the above method is difficult to prepare the vanadium-aluminum-tin-chromium master alloy according to a specific ratio when used, which increases the limitations of the above method, thereby affecting the performance and application effect of the alloy, increasing production costs and quality control difficulties, and reducing product reliability and market competitiveness. At the same time, an inaccurate ratio of vanadium and aluminum will seriously affect the strength and toughness of the alloy, and a deviation in the ratio of chromium and tin will affect corrosion resistance and processing performance. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing a vanadium-aluminum-tin-chromium intermediate alloy for use in the preparation of titanium alloys, which solves the problem that it is difficult to prepare a vanadium-aluminum-tin-chromium intermediate alloy according to a specific ratio in the background technology, increases the limitations of the above method, thereby affecting the performance and application effect of the alloy, increasing production costs and quality control difficulties, and reducing product reliability and market competitiveness.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy comprises the following steps:

[0007] S1. Raw material preparation: prepare vanadium, aluminum, tin and chromium with a purity of 99.9%;

[0008] S2. Melting process: using a vacuum induction melting furnace to sequentially load the prepared vanadium, aluminum, tin and chromium into the vacuum induction melting furnace to obtain alloy liquid;

[0009] S3, casting: using a vacuum casting machine to pour the alloy liquid in S2 into the vacuum casting machine to obtain a casting;

[0010] S4, heat treatment: using a high temperature furnace to heat the casting in S3 to eliminate internal stress;

[0011] S5, surface treatment: grinding, polishing and cleaning the casting after the S4 heat treatment;

[0012] S6. Quality inspection: Use spectrometer equipment to detect the chemical composition of the alloy to ensure that the mechanical properties of the alloy meet the requirements;

[0013] S7. Packaging and storage: The tested alloys shall be packaged and stored to ensure long-term protection of the alloys from oxidation, contamination and physical damage, and to maintain the stability of their quality and performance.

[0014] Preferably, preparing 1000 alloys includes: the alloy composition ratio of vanadium, aluminum, tin and chromium is 40%:30%:20%:10%;

[0015] The effective content of vanadium is 40.0%×99.9%=39.96%;

[0016] The effective content of aluminum is 30.0%×99.9%=29.97%;

[0017] The effective content of tin is 20.0%×99.9%=19.98%;

[0018] The effective content of chromium is 10.0%×99.9%=9.99%;

[0019] The mass of the vanadium and the actual mass are 1000 g × 39.96% = 399.6 g, 399.6 g ÷ 99.9% = 399.9 g;

[0020] The mass of the aluminum and the actual mass are 1000 g × 29.97% = 299.7 g, 299.7 g ÷ 99.9% = 299.9 g;

[0021] The mass of the tin and the actual mass are 1000 g × 19.98% = 199.8 g, 199.8 g ÷ 99.9% = 200.0 g;

[0022] The mass of chromium and the actual mass are 1000 grams × 9.99% = 99.9 grams, 99.9 grams ÷ 99.9% = 100.0 grams, so the actual total mass is 399.9 grams + 299.9 grams + 200.0 grams + 100.0 grams = 999.8 grams. Through the above detailed ingredient calculation steps, it can be ensured that the chemical composition of the prepared vanadium aluminum tin chromium intermediate alloy meets the requirements, thereby providing high-quality raw materials for subsequent titanium alloy preparation.

[0023] Preferably, the smelting process further comprises the following steps:

[0024] a. Cut the vanadium, aluminum, tin and chromium of qualified purity into appropriate sizes, remove the oxide layer on their surface, and preliminarily mix the treated vanadium, aluminum, tin and chromium under the protection of inert gas to ensure uniform distribution of each element;

[0025] b. Using vacuum induction melting furnace for melting can effectively prevent alloy oxidation and contamination;

[0026] c. Load the mixed raw materials into the vacuum induction melting furnace and ensure that the loading is uniform, start the vacuum induction melting furnace, and melt them;

[0027] d. Gradually increase the furnace temperature. Since tin has a low melting point, melt tin first, then melt aluminum, chromium and vanadium in turn.

[0028] Preferably, the smelting process further includes installing a temperature sensor in the vacuum induction melting furnace and observing the value of the temperature sensor to facilitate controlling the heating rate and the insulation time during the smelting process to ensure that all elements are fully melted and evenly mixed.

[0029] Preferably, the smelting process also includes ensuring that the melt composition is highly uniform by electromagnetic stirring during the smelting process, and performing purification treatment to remove gas and inclusions in the melt, followed by natural cooling.

[0030] Preferably, the casting further comprises the following steps:

[0031] a. Preheating: Put the naturally cooled raw materials into a heating furnace and then heat them to between 800℃ and 1200℃ to improve plasticity and reduce deformation resistance. Keep uniform heating during the preheating process;

[0032] b. Heating: The preheated raw materials are further heated to the forging temperature of 900℃-1300℃ to further ensure that the raw materials have good plasticity and fluidity, and are heated in a controlled atmosphere to avoid oxidation and decarburization;

[0033] c. Place the heated raw materials on a press to crush the as-cast structure, preliminarily shape and eliminate internal pores and inclusions, and then press multiple times to gradually increase the deformation, refine the grains, reduce internal defects, further shape, and finally press forge the size and shape to obtain a uniform structure and excellent mechanical properties;

[0034] d. During the forging process, the heating temperature is maintained between 800℃ and 1100℃, the raw material temperature is gradually increased from the initial forming, and the cooling rate of the raw material is controlled by water cooling to avoid cracks and deformation caused by too fast cooling. The water cooling rate is 50℃ / min to 100℃ / min.

[0035] Preferably, during the forging process, the raw material is deformed multiple times, including stretching, compression, torsion and other operations, to improve its density and mechanical properties. Through the appropriate deformation amount and deformation rate, the grain size of the raw material is refined and internal defects are eliminated, thereby significantly improving the overall performance of the alloy.

[0036] Preferably, the S4 heat treatment specifically comprises the following steps:

[0037] a. Annealing: by heating the raw material to 800℃ to 1000℃ and keeping it for 1 to 4 hours, and then slowly cooling (20℃ / h to 50℃ / h) to eliminate internal stress again, refine grains and improve plasticity;

[0038] b. Solution treatment: heat the raw material to 1000℃ to 1200℃, keep it warm for 1 to 2 hours, and then cool it quickly (50℃ / min to 100℃ / min) to obtain a supersaturated solid solution;

[0039] c. Aging treatment: Keep at 400℃ to 600℃ for 4 to 24 hours, then cool slowly (10℃ / h to 50℃ / h) to promote the precipitation of the precipitated phase and improve the strength and hardness;

[0040] d. Quenching: heating to 800°C to 1000°C, keeping warm for 0.5 to 2 hours, and rapid cooling (50°C / min to 100°C / min) to obtain martensite or bainite structure to improve hardness and strength;

[0041] e. Tempering: Heat to 200℃ to 500℃, keep warm for 1 to 4 hours, and cool slowly (20℃ / h to 50℃ / h) to improve toughness and plasticity. The mechanical properties and organizational structure of the alloy can be further optimized by precisely controlling the heating temperature, holding time and cooling rate.

[0042] Preferably, the S5 surface treatment specifically comprises the following steps:

[0043] a. Cleaning: Use acidic solution to remove oil, rust and impurities on the surface;

[0044] b. Mechanical treatment: Use grinding method to remove burrs and unevenness on the surface, improve surface roughness and enhance coating adhesion;

[0045] c. Chemical treatment: Through pickling chemical reaction, a protective film is formed to improve corrosion resistance and surface hardness;

[0046] d. Coating: Apply coating materials and spraying to improve the wear resistance, corrosion resistance and aesthetics of the surface;

[0047] e. Curing: Bake the sprayed raw materials at 20℃-30℃ to fully cure the coating material and form a stable protective layer.

[0048] Preferably, the S6 quality detection specifically includes the following steps:

[0049] a. Take samples from the production batch and uniquely identify them to ensure traceability, then conduct a preliminary inspection of appearance, size and basic performance to screen out obviously unqualified products;

[0050] b. Evaluate the strength, toughness and hardness of the material through tensile, bending, impact and other tests, and then use a spectrometer to analyze the chemical composition and impurity content of the material;

[0051] c. Conduct environmental adaptability, durability and aging tests to evaluate the long-term performance and stability of the product, and test the various functions and operating performance of the product by simulating the actual use environment;

[0052] d. Determine whether the product is qualified based on the test results and prepare a detailed quality inspection report.

[0053] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0054] 1. The present invention can customize the preparation of a specific vanadium-aluminum-tin-chromium master alloy through the operation of preparing with a fixed ratio, thereby improving the flexibility of the method, thereby increasing the performance and application effect of the alloy, reducing the production cost and the difficulty of quality control, and enhancing the reliability and market competitiveness of the product. At the same time, it solves the problem that the inaccurate ratio of vanadium and aluminum in the existing method will seriously affect the strength and toughness of the alloy, and the deviation of the ratio of chromium and tin will affect the corrosion resistance and processing performance;

[0055] 2. The present invention can improve the overall performance of the customized vanadium-aluminum-tin-chromium master alloy by fixing the preheating temperature zone value during forging, thereby significantly improving the strength, hardness and toughness of the alloy, making it perform well in a high-stress environment. At the same time, the high-performance alloy can withstand greater loads and more complex working conditions, extend the service life of the equipment, and reduce the frequency of maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A flow chart of the overall method of the present invention;

[0057] Figure 2 A flow chart for casting of the present invention;

[0058] Figure 3 is a flow chart of the smelting process of the present invention;

[0059] Figure 4 is a flow chart of the heat treatment of the present invention;

[0060] Figure 5 A flow chart of the surface treatment of the present invention;

[0061] Figure 6 It is a flow chart of quality detection of the present invention. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] See also Figure 1A method for preparing a vanadium-aluminum-tin-chromium master alloy for titanium alloy preparation comprises the following steps: raw material preparation: preparing vanadium, aluminum, tin and chromium with a purity of 99.9%; smelting process: using a vacuum induction melting furnace to sequentially load the prepared vanadium, aluminum, tin and chromium into the vacuum induction melting furnace to obtain alloy liquid; casting: using a vacuum casting machine to pour the alloy liquid in S2 into the vacuum casting machine to obtain a casting; heat treatment: using a high temperature furnace to heat the casting in S3 to eliminate internal stress; surface treatment: using a high temperature furnace to heat the casting in S4 ... Grinding, polishing and cleaning; Quality inspection: Use spectrometer equipment to detect the chemical composition of the alloy to ensure that the mechanical properties of the alloy meet the requirements; Packaging and storage: Pack and store the tested alloy to ensure that the alloy is permanently protected from oxidation, contamination and physical damage, and maintain the stability of its quality and performance; Prepare 1,000 alloys including: the alloy composition ratio of vanadium, aluminum, tin and chromium is 40%: 30%: 20%: 10%; the effective component of vanadium is 40.0% × 99.9% = 39.96%; the effective component of aluminum is 30.0% × 99.9% = 29.97%; the effective component of tin is 20.0% × 99.9% = 19.98%; the effective component of chromium is 10.0% × 99.9% = 9.99%; the mass of vanadium and the actual mass are 1000 grams × 39.96% = 399.6 grams, 399.6 grams ÷ 99.9% = 399.9 grams; the mass of aluminum and the actual mass are 1000 grams × 29.97% = 299.7 grams, 299.7 grams ÷ 99.9% = 299.9 grams; the mass of tin and the actual mass are 1000 grams × 19 .98% = 199.8 g, 199.8 g ÷ 99.9% = 200.0 g; the mass of chromium and the actual mass are 1000 g × 9.99% = 99.9 g, 99.9 g ÷ 99.9% = 100.0 g, so the actual total mass is 399.9 g + 299.9 g + 200.0 g + 100.0 g = 999.8 g. Through the above detailed batching calculation steps, it can be ensured that the chemical composition of the prepared vanadium aluminum tin chromium master alloy meets the requirements, thereby providing high-quality raw materials for the subsequent titanium alloy preparation;

[0064] Through the operation of fixed ratio preparation, the preparation of specific vanadium-aluminum-tin-chromium master alloy can be customized, which improves the flexibility of the method, thereby increasing the performance and application effect of the alloy, reducing production costs and the difficulty of quality control, and enhancing product reliability and market competitiveness. At the same time, it solves the problem that the inaccurate ratio of vanadium and aluminum in the existing method will seriously affect the strength and toughness of the alloy, and the deviation of the ratio of chromium and tin will affect the corrosion resistance and processing performance.

[0065] refer to Figure 3-Figure 6The smelting process also includes the following steps: cutting vanadium, aluminum, tin and chromium of qualified purity into appropriate sizes, removing the oxide layer on their surfaces, and preliminarily mixing the treated vanadium, aluminum, tin and chromium under the protection of inert gas to ensure that the elements are evenly distributed; using a vacuum induction melting furnace for smelting can effectively prevent alloy oxidation and contamination; loading the mixed raw materials into the vacuum induction melting furnace and ensuring that the loading is uniform, starting the vacuum induction melting furnace and melting them; gradually increasing the furnace temperature, since the melting point of tin is low, tin is melted first, and then aluminum, chromium and vanadium are melted in turn. The smelting process also includes installing a temperature sensor in the vacuum induction melting furnace, observing the value of the temperature sensor, and conveniently controlling the heating rate and holding time during the smelting process to ensure that the elements are fully melted and evenly mixed. The smelting process also includes electromagnetic stirring during the smelting process. Stirring ensures that the melt composition is highly uniform, and at the same time purifies it to remove gas and inclusions in the melt, and then cools it naturally. The S4 heat treatment specifically includes the following steps: Annealing: heating the raw material to 800℃ to 1000℃ and keeping it warm for 1 to 4 hours, and then slowly cooling it (20℃ / h to 50℃ / h) to eliminate internal stress again, refine grains and improve plasticity; Solution treatment: heating the raw material to 1000℃ to 1200℃, keeping it warm for 1 to 2 hours, and then rapidly cooling it (50℃ / min to 100℃ / min) to obtain a supersaturated solid solution; Aging treatment: keeping it warm at 400℃ to 600℃ for 4 to 24 hours, and then slowly cooling it (10℃ / h to 50℃ / h) to promote the precipitation of the precipitated phase and improve strength and hardness; Quenching: heating it to 800℃ to 1000℃, keeping it warm for 0.5 to 2 hours, rapid cooling (50℃ / min to 100℃ / min) to obtain martensite or bainite structure, improve hardness and strength; tempering: heating to 200℃ to 500℃, keeping warm for 1 to 4 hours, slow cooling (20℃ / h to 50℃ / h) to improve toughness and plasticity, and further optimize the mechanical properties and organizational structure of the alloy by precisely controlling the heating temperature, holding time and cooling rate. The S5 surface treatment specifically includes the following steps: cleaning: using an acidic solution to remove oil, rust and impurities on the surface; mechanical treatment: using a grinding method to remove burrs and unevenness on the surface, improve surface roughness, and enhance coating adhesion; chemical treatment: through pickling chemical reaction, a protective film is formed to improve corrosion resistance and surface hardness; coating: applying plating materials and spraying, Improve the wear resistance, corrosion resistance and aesthetics of the surface; Curing: Bake the sprayed raw materials between 20℃-30℃ to fully cure the coating material and form a stable protective layer. S6 quality inspection specifically includes the following steps: Take samples from the production batch and uniquely identify them to ensure the traceability of the samples, then conduct a preliminary inspection of the appearance, size and basic performance to screen out obviously unqualified products; evaluate the strength, toughness and hardness of the materials through tensile, bending, impact and other tests, and then use a spectrometer to analyze the chemical composition and impurity content of the materials; conduct environmental adaptability, durability and aging tests to evaluate the long-term performance and stability of the products, and test the various functions and operating performance of the products by simulating the actual use environment; determine whether the products are qualified based on the test results, and prepare a detailed quality inspection report. .

[0066] Please also refer to Figure 2, casting also includes the following steps: preheating: placing the naturally cooled raw materials into a heating furnace, and then heating them to between 800℃-1200℃ to improve plasticity and reduce deformation resistance, and maintaining uniform heating during the preheating process; heating: further heating the preheated raw materials to a forging temperature of 900℃-1300℃ to further ensure that the raw materials have good plasticity and fluidity, and heating in a controlled atmosphere to avoid oxidation and decarburization; placing the heated raw materials on a press to crush the cast structure, preliminarily shape and eliminate internal pores and inclusions, and on this basis, perform multiple pressings to gradually increase the deformation, refine the grains, reduce internal defects, and further shape, and finally After that, the size and shape are pressed and forged to obtain uniform organizational structure and excellent mechanical properties. During the forging process, the heating temperature is maintained between 800℃ and 1100℃, and the temperature of the raw materials is gradually increased from the initial forming, and the cooling rate of the raw materials is controlled by water cooling to avoid cracks and deformation caused by too fast cooling. The water cooling rate is 50℃ / min to 100℃ / min. During the forging process, the raw materials are deformed multiple times, including stretching, compression, torsion and other operations, to improve their density and mechanical properties. Through the appropriate deformation amount and deformation rate, the grain size of the raw materials can be refined, and internal defects can be eliminated, thereby significantly improving the overall performance of the alloy.

[0067] By fixing the preheating temperature zone value during forging, the overall performance of the customized vanadium-aluminum-tin-chromium master alloy can be improved, thereby significantly improving the strength, hardness and toughness of the alloy, enabling it to perform well in high-stress environments. At the same time, the high-performance alloy can withstand greater loads and more complex working conditions, extending the service life of the equipment and reducing the frequency of maintenance and replacement.

[0068] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a vanadium-aluminum-tin-chromium master alloy for titanium alloy preparation, characterized in that: The following steps are involved: S1. Raw material preparation: prepare vanadium, aluminum, tin and chromium with a purity of 99.9%; S2. Melting process: using a vacuum induction melting furnace to sequentially load the prepared vanadium, aluminum, tin and chromium into the vacuum induction melting furnace to obtain alloy liquid; S3, casting: using a vacuum casting machine to pour the alloy liquid in S2 into the vacuum casting machine to obtain a casting; S4, heat treatment: using a high temperature furnace to heat the casting in S3 to eliminate internal stress; S5, surface treatment: grinding, polishing and cleaning the casting after the S4 heat treatment; S6. Quality inspection: Use spectrometer equipment to detect the chemical composition of the alloy to ensure that the mechanical properties of the alloy meet the requirements; S7. Packaging and storage: The tested alloys shall be packaged and stored to ensure long-term protection of the alloys from oxidation, contamination and physical damage, and to maintain the stability of their quality and performance.

2. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 1, characterized in that: The preparation of 1000 alloys includes: the alloy composition ratio of vanadium, aluminum, tin and chromium is 40%:30%:20%:10%; The effective content of vanadium is 40.0%×99.9%=39.96%; The effective content of aluminum is 30.0%×99.9%=29.97%; The effective content of tin is 20.0%×99.9%=19.98%; The effective content of chromium is 10.0%×99.9%=9.99%; The mass of the vanadium and the actual mass are 1000 g × 39.96% = 399.6 g, 399.6 g ÷ 99.9% = 399.9 g; The mass of the aluminum and the actual mass are 1000 g × 29.97% = 299.7 g, 299.7 g ÷ 99.9% = 299.9 g; The mass of the tin and the actual mass are 1000 g × 19.98% = 199.8 g, 199.8 g ÷ 99.9% = 200.0 g; The mass of chromium and the actual mass are 1000 grams × 9.99% = 99.9 grams, 99.9 grams ÷ 99.9% = 100.0 grams, so the actual total mass is 399.9 grams + 299.9 grams + 200.0 grams + 100.0 grams = 999.8 grams. Through the above detailed ingredient calculation steps, it can be ensured that the chemical composition of the prepared vanadium aluminum tin chromium intermediate alloy meets the requirements, thereby providing high-quality raw materials for subsequent titanium alloy preparation.

3. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 1, characterized in that: The smelting process also includes the following steps: a. Cut the vanadium, aluminum, tin and chromium of qualified purity into appropriate sizes, remove the oxide layer on their surface, and preliminarily mix the treated vanadium, aluminum, tin and chromium under the protection of inert gas to ensure uniform distribution of each element; b. Using vacuum induction melting furnace for melting can effectively prevent alloy oxidation and contamination; c. Load the mixed raw materials into the vacuum induction melting furnace and ensure that the loading is uniform, start the vacuum induction melting furnace, and melt them; d. Gradually increase the furnace temperature. Since tin has a low melting point, melt tin first, then melt aluminum, chromium and vanadium in turn.

4. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 3, characterized in that: The smelting process also includes installing a temperature sensor in the vacuum induction melting furnace and observing the value of the temperature sensor to facilitate controlling the heating rate and the insulation time during the smelting process to ensure that all elements are fully melted and evenly mixed.

5. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 3, characterized in that: The smelting process also includes ensuring a highly uniform composition of the melt by electromagnetic stirring during the smelting process, while performing a purification process to remove gas and inclusions in the melt, followed by natural cooling.

6. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 1, characterized in that: The casting further comprises the following steps: a. Preheating: Put the naturally cooled raw materials into a heating furnace and then heat them to between 800℃ and 1200℃ to improve plasticity and reduce deformation resistance. Keep uniform heating during the preheating process; b. Heating: The preheated raw materials are further heated to the forging temperature of 900℃-1300℃ to further ensure that the raw materials have good plasticity and fluidity, and are heated in a controlled atmosphere to avoid oxidation and decarburization; c. Place the heated raw materials on a press to crush the as-cast structure, preliminarily shape and eliminate internal pores and inclusions, and then press multiple times to gradually increase the deformation, refine the grains, reduce internal defects, further shape, and finally press forge the size and shape to obtain a uniform structure and excellent mechanical properties; d. During the forging process, the heating temperature is maintained between 800℃ and 1100℃, the raw material temperature is gradually increased from the initial forming, and the cooling rate of the raw material is controlled by water cooling to avoid cracks and deformation caused by too fast cooling. The water cooling rate is 50℃ / min to 100℃ / min.

7. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 6, characterized in that: During the forging process, the raw material is deformed multiple times, including stretching, compression, torsion and other operations, to improve its density and mechanical properties. Through the appropriate deformation amount and deformation rate, the grain size of the raw material can be refined and internal defects can be eliminated, thereby significantly improving the overall performance of the alloy.

8. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 1, characterized in that: S4 heat treatment specifically includes the following steps: a. Annealing: by heating the raw material to 800℃ to 1000℃ and keeping it for 1 to 4 hours, and then slowly cooling (20℃ / h to 50℃ / h) to eliminate internal stress again, refine grains and improve plasticity; b. Solution treatment: heat the raw material to 1000℃ to 1200℃, keep it warm for 1 to 2 hours, and then cool it quickly (50℃ / min to 100℃ / min) to obtain a supersaturated solid solution; c. Aging treatment: Keep at 400℃ to 600℃ for 4 to 24 hours, then cool slowly (10℃ / h to 50℃ / h) to promote the precipitation of the precipitated phase and improve the strength and hardness; d. Quenching: heating to 800°C to 1000°C, keeping warm for 0.5 to 2 hours, and rapid cooling (50°C / min to 100°C / min) to obtain martensite or bainite structure to improve hardness and strength; e. Tempering: Heat to 200℃ to 500℃, keep warm for 1 to 4 hours, and cool slowly (20℃ / h to 50℃ / h) to improve toughness and plasticity. The mechanical properties and organizational structure of the alloy can be further optimized by precisely controlling the heating temperature, holding time and cooling rate.

9. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 1, characterized in that: The S5 surface treatment specifically includes the following steps: a. Cleaning: Use acidic solution to remove oil, rust and impurities on the surface; b. Mechanical treatment: Use grinding method to remove burrs and unevenness on the surface, improve surface roughness and enhance coating adhesion; c. Chemical treatment: Through pickling chemical reaction, a protective film is formed to improve corrosion resistance and surface hardness; d. Coating: Apply coating materials and spraying to improve the wear resistance, corrosion resistance and aesthetics of the surface; e. Curing: Bake the sprayed raw materials at 20℃-30℃ to fully cure the coating material and form a stable protective layer.

10. The method for preparing a vanadium-aluminum-tin-chromium master alloy for preparing a titanium alloy according to claim 1, characterized in that: The S6 quality inspection specifically includes the following steps: a. Take samples from the production batch and uniquely identify them to ensure traceability, then conduct a preliminary inspection of appearance, size and basic performance to screen out obviously unqualified products; b. Evaluate the strength, toughness and hardness of the material through tensile, bending, impact and other tests, and then use a spectrometer to analyze the chemical composition and impurity content of the material; c. Conduct environmental adaptability, durability and aging tests to evaluate the long-term performance and stability of the product, and test the various functions and operating performance of the product by simulating the actual use environment; d. Determine whether the product is qualified based on the test results and prepare a detailed quality inspection report.

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