Isometric crystal reinforced titanium alloy component and preparation method and application thereof

Abstract

The invention provides an isometric crystal reinforced titanium alloy component and a preparation method and application thereof.The preparation method comprises the steps that a titanium alloy welding wire serves as a raw material, the titanium alloy component is manufactured through an electric arc additive manufacturing technology, and in the process of manufacturing the titanium alloy component through electric arc additive manufacturing, an electric arc is controlled to advance in a sine wave swing mode; and meanwhile, the sediment is rapidly cooled till the titanium alloy component is machined. According to the method, the temperature fluctuation effect is improved in the mode that arc swing is combined with rapid cooling, the proportion of isometric crystals in the titanium alloy is increased, the anisotropy of the titanium alloy component is weakened, and the comprehensive mechanical property of the titanium alloy component is improved.

Description

Technical Field

[0001] The invention relates to the technical field of titanium alloys, and in particular to an equiaxed crystal reinforced titanium alloy component and a preparation method and application thereof. Background Art

[0002] WAAM technology is a type of directed energy deposition 3D printing. Directed energy deposition technology is a metal 3D printing technology that can deposit metal materials in powder or wire form through a nozzle mounted on a multi-axis arm, using laser or electron beam or plasma focused energy source material. WAAM is inspired by arc welding and uses arc as a heat source. Compared with traditional manufacturing methods, WAAM technology has low equipment cost, high material utilization rate, and flexible forming components. It is a more cost-effective and sustainable solution that is easy to achieve automated control and efficient customization of complex parts. WAAM technology has aroused great interest in industry and academia due to its advantages of high deposition efficiency, high material utilization rate and low equipment cost. At present, WAAM technology has been successfully used to manufacture materials such as Ti6Al4V, steel, and In718. In particular, WAAM technology can process metals that are highly reflective to lasers, such as aluminum alloys and copper alloys. In addition, WAAM technology can meet the production needs of large-size aluminum alloy parts. Today, the aerospace industry has increasingly higher requirements for the application of WAAM technology to manufacture high-strength aluminum alloy structures.

[0003] Titanium alloys have excellent corrosion resistance and good high-temperature performance, and are widely used in the biomedical field, aerospace field, and automobile manufacturing field. WAAM technology can be used to prepare titanium alloys because it has the advantages of high deposition efficiency, high material utilization rate, and low equipment cost, which helps to shorten production time. However, WAAM technology uses layer-by-layer stacking and heat accumulation to make titanium alloys present columnar β crystals instead of equiaxed β crystals. The microstructure is mainly composed of epitaxially grown columnar crystals, and the performance is high-strength and low-plasticity. Therefore, there are large differences in mechanical properties in different directions, that is, the material has large anisotropy. As a result, the comprehensive mechanical properties of titanium alloy parts or repair parts formed by WAAM technology are difficult to meet the use requirements.

[0004] The Chinese patent document discloses "a high-strength and high-plasticity laser additive manufacturing titanium alloy based on equiaxed fine grain strengthening", and its publication number is CN 114959362A. The titanium alloy of the invention is prepared by a laser additive manufacturing method. A certain amount of Cr, Mo, and Zr are added to the TC4 titanium alloy to increase the limiting growth factor and improve its ability to form equiaxed crystals. In addition, laser additive manufacturing is combined to obtain fully equiaxed crystals and good intracrystalline structure, improving its comprehensive mechanical properties. However, the invention requires adjustment of the elemental composition of the titanium alloy, and the method itself cannot achieve equiaxed crystal strengthening of the titanium alloy, and cannot be applied to the laser additive manufacturing of titanium alloy components with specific elemental composition. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an equiaxed crystal reinforced titanium alloy component and a preparation method and application thereof, so as to solve the problem that the titanium alloy components prepared by the existing WAAM technology have large anisotropy.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a method for preparing an equiaxed crystal reinforced titanium alloy component, which uses titanium alloy welding wire as raw material and adopts arc additive manufacturing process to manufacture the titanium alloy component. During the arc additive manufacturing process of the titanium alloy component, the arc is controlled to move in the form of a sinusoidal wave swing, and the deposit is rapidly cooled until the titanium alloy component is completed.

[0007] Preferably, the arc swing amplitude is controlled to be 0.5-6 mm and the frequency is controlled to be 0.5-4 Hz.

[0008] Preferably, the process parameters for arc additive manufacturing of titanium alloy components are: current 180~350A, voltage 15~25V, wire feeding speed 1000~1900mm / min, and welding moving speed 3~10mm / s.

[0009] Preferably, the rapid cooling treatment uses liquid argon gas to be sprayed on the surface of the deposit in liquid form.

[0010] The present invention adopts the following technical concepts to obtain the above technical solution: Constructing a relationship model between the temperature gradient of the molten pool and the solidification rate during the arc swing process, and determining the crystal form of the solidification structure of the titanium alloy according to the relationship model, wherein the crystal form includes columnar crystals, equiaxed crystals and mixed crystals, and the mixed crystals are mixed crystal forms of columnar crystals and equiaxed crystals; The relationship model is: K=G / R, Where K is the ratio of temperature gradient to solidification rate G is the temperature gradient, and the calculation formula of G is as follows: ; R is the solidification rate, and the calculation formula of R is as follows: ; .

[0011] Among them, the liquidus temperature L of titanium alloy is 1660℃, and the solidus temperature S is 1600℃.

[0012] The present application has found that the crystal type of the solidification structure of the titanium alloy is associated with the welding movement speed according to the relationship model: (1) When the welding speed is relatively fast, i.e., the welding moving speed > 10 mm / s, When K < 1000, it is determined that the crystal form of the solidification structure of the titanium alloy is equiaxed crystal; When 1000 < K < 6000, it is determined that the crystal form of the solidification structure of the titanium alloy is mixed crystal; When K > 6000, it is determined that the crystal form of the solidification structure of the titanium alloy is columnar crystal.

[0013] (2) When the welding speed is moderate, i.e., the welding moving speed is 3 - 10 mm / s, When K < 1000, it is determined that the crystal form of the solidification structure of the titanium alloy is equiaxed crystal; When 1000 < K < 10000, it is determined that the crystal form of the solidification structure of the titanium alloy is mixed crystal; When K > 10000, it is determined that the crystal form of the solidification structure of the titanium alloy is columnar crystal.

[0014] (3) When the welding speed is slow, i.e., the welding moving speed < 1 mm / s, When K < 2000, it is determined that the crystal form of the solidification structure of the titanium alloy is equiaxed crystal; When 2000 < K < 12000, it is determined that the crystal form of the solidification structure of the titanium alloy is mixed crystal; When K > 12000, it is determined that the crystal form of the solidification structure of the titanium alloy is columnar crystal.

[0015] Through the above judgment criteria, the present application proposes an arc oscillation method for generating equiaxed crystals, which needs to travel in the form of sinusoidal wave oscillation, and at the same time, the deposited material is rapidly cooled to optimize the grains, obtain more equiaxed primary β grains, and weaken the anisotropy of the titanium alloy components.

[0016] Preferably, the titanium alloy welding wire is a TC4 welding wire with an oxygen element content less than 0.1%. It can ensure excellent mechanical properties after the titanium alloy welding process, relatively stable elongation, and will not produce brittleness due to excessive oxygen content and large oxidation degree.

[0017] The present invention also provides an equiaxed crystal reinforced titanium alloy component prepared by the above preparation method.

[0018] Preferably, the proportion of equiaxed crystals in the equiaxed crystal reinforced titanium alloy component is not less than 50%.

[0019] Preferably, the difference between the transverse tensile strength and the longitudinal tensile strength of the equiaxed crystal reinforced titanium alloy component is not greater than 5 Mpa.

[0020] The present invention also provides an application of the above equiaxed crystal reinforced titanium alloy component in the aerospace field.

[0021] As described above, the equiaxed crystal reinforced titanium alloy component of the present invention and its preparation method and application have the following beneficial effects: increasing the temperature fluctuation effect by combining arc swing with rapid cooling, improving the proportion of equiaxed crystals in the titanium alloy, weakening the anisotropy of the titanium alloy component, and improving its comprehensive mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown are the results of the swing simulation and experimental data verification: (a) molten pool with swing; (b) molten pool without swing; (c) photo of the molten pool during the actual swing process.

[0023] Figure 2 Shown is a simulation diagram of the thermal cycle temperature distribution during arc swing.

[0024] Figure 3 A diagram showing the mechanism of rapid cooling.

[0025] Figure 4 Shown is the metallographic image of the TC4 titanium alloy component prepared in Example 1.

[0026] Figure 5 Shown is the metallographic image of the TC4 titanium alloy component prepared in Comparative Example 1.

[0027] Figure 6 Shown is the electron backscattered original β grain image of the TC4 titanium alloy component prepared in Example 1.

[0028] Figure 7 Shown is the electron backscattered original β grain image of the TC4 titanium alloy component prepared in Comparative Example 1.

[0029] Figure 8 It shows a comparison chart of the transverse tensile strength and the longitudinal tensile strength of the TC4 titanium alloy component prepared in Comparative Example 1 and the TC4 titanium alloy component prepared in Example 1. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0032] In addition, it should be understood that one or more method steps mentioned in the present invention do not exclude the existence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in the present invention does not exclude the existence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these explicitly mentioned two devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or the scope of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the present invention without substantially changing the technical content.

[0033] In the following embodiments of the present application, the following equipment is used: A protective gas support box is provided with a local protective gas inside. The local protective gas is liquid argon gas, which is used for rapid cooling treatment. Liquid argon gas is sprayed on the surface of the deposit in liquid form to accelerate the cooling speed and prevent oxidation; Welding robots, TIG arc welders and wire feeding systems; Titanium alloy base plate and TC4 welding wire; Welding tooling platform, used to fix titanium alloy base plate.

[0034] At present, some breakthroughs have been made in improving the anisotropy of arc additive materials, especially in aluminum alloys, magnesium alloys, and other low-melting-point metals. During the swinging process, the turbulence generated by the swinging causes the dendrites in the solidification process to break, forming new nuclei, thereby forming more equiaxed crystals and weakening the anisotropy. No one has mentioned the scheme of optimizing the grain size of titanium alloy metals by arc swinging. Although some scholars have used the method of applying an external magnetic field to optimize the grain size and improve the corrosion performance of titanium alloys, there is not much equiaxed optimization effect on the original β grains.

[0035] The technical concept of the present application is as follows: firstly, a relationship model between the temperature gradient of the molten pool and the solidification rate in the titanium alloy additive process is calculated by finite element method, and the crystal form of the solidification structure of the titanium alloy is determined according to the relationship model, wherein the crystal form includes columnar crystals, equiaxed crystals and mixed crystals, and the mixed crystals are mixed crystal forms of columnar crystals and equiaxed crystals; The relationship model is: K=G / R, Where K is the ratio of temperature gradient to solidification rate; G is the temperature gradient, and the calculation formula of G is as follows: ; R is the solidification rate, and the calculation formula of R is as follows: ; , The liquidus temperature L of the titanium alloy is 1660 °C, and the solidus temperature S is 1600 °C.

[0036] The crystal form of the solidification structure of the titanium alloy determined according to the relationship model is associated with the welding moving speed: (1) When the welding speed is relatively fast, that is, the welding moving speed > 10 mm / s, When K < 1000, it is determined that the crystal form of the solidification structure of the titanium alloy is equiaxed crystal; When 1000 < K < 6000, it is determined that the crystal form of the solidification structure of the titanium alloy is mixed crystal; When K > 6000, it is determined that the crystal form of the solidification structure of the titanium alloy is columnar crystal.

[0037] (2) When the welding speed is moderate, that is, the welding moving speed is 3 - 10 mm / s, When K < 1000, it is determined that the crystal form of the solidification structure of the titanium alloy is equiaxed crystal; When 1000 < K < 10000, it is determined that the crystal form of the solidification structure of the titanium alloy is mixed crystal; When K > 10000, it is determined that the crystal form of the solidification structure of the titanium alloy is columnar crystal.

[0038] (3) When the welding speed is slow, that is, the welding moving speed < 1 mm / s, When K < 2000, it is determined that the crystal form of the solidification structure of the titanium alloy is equiaxed crystal; When 2000 < K < 12000, it is determined that the crystal form of the solidification structure of the titanium alloy is mixed crystal; When K > 12000, it is determined that the crystal form of the solidification structure of the titanium alloy is columnar crystal.

[0039] Based on the above judgment criteria, the present application proposes an arc oscillation method for generating equiaxed crystals, which needs to travel in the form of a sine wave oscillation, and at the same time, the deposit is rapidly cooled to optimize the grains, obtain more equiaxed primary β grains, and weaken the anisotropy of the titanium alloy components.

[0040] The specific implementation method of the TC4 equiaxed β grains in the present application is as follows: Thermodynamic simulation is carried out on the temperature of the molten pool by arc oscillation, and it is found that the oscillation has a certain fluctuation effect on the solidification of the molten pool. According to the above temperature field change model, the fluctuation range of the temperature is adjusted so that it falls within the solidification temperature range of the titanium alloy, that is, 1600 - 1660 °C, that is, the dendrite fracture is refined and the grain morphology is changed, so as to optimize the grains, obtain more equiaxed primary β grains, and weaken the anisotropy of the titanium alloy components.

[0041] The specific implementation steps are as follows: like Figure 1 As shown in the figure, the size of the swinging molten pool is obtained based on the finite element thermodynamic simulation and verified with the actual molten pool photos; Figure 1 (a) and Figure 1 As can be seen from (b) in the figure, the swinging process will seriously affect the morphology of the molten pool, transforming the original elliptical structure into an approximate circle. Figure 1 From the molten pool shooting results in (c), it can be seen that the simulation results are highly consistent with the actual molten pool.

[0042] According to the verified thermodynamic curve, the arc swing has a certain up and down fluctuation effect on titanium alloy. However, this effect will weaken after the second and third remelting. Figure 2 shown.

[0043] This application study found that the arc swing is effective in titanium alloys. The core improvement method is to control the arc to move in the form of sine wave swing and expand the swing to the effective solidification range of titanium alloys, that is, 1600~1660℃. In this range, there will be a sudden solidification during the melting process, followed by remelting. In view of the existing fluctuations, liquid argon is added to assist in rapid cooling, which instantly lowers the temperature and induces dendrite fracture. The specific mechanism of rapid cooling is as follows: Figure 3 shown.

[0044] Example 1 The present application provides a method for preparing an equiaxed crystal reinforced titanium alloy component, comprising the following steps: (1) Use TC4 titanium alloy welding wire with an oxygen content of less than 0.1% as the raw material for arc additive, and fix the TC4 additive substrate; (2) Install the protective gas support box. There is a local protective gas inside the protective gas support box. The local protective gas is liquid argon. While avoiding oxidation of titanium alloy after welding, it greatly accelerates the cooling speed and increases the possibility of molten pool fluctuations; (3) Use the welding robot to set the arc swing trajectory. The arc swing amplitude is 6 mm, the frequency is 2 Hz, and it swings in a sinusoidal wave. (4) Use a welding robot to perform additive manufacturing on a titanium alloy substrate, with a controlled current of 180A, a voltage of 15V, a wire feeding speed of 1900mm / min, a welding moving speed of 3mm / s, and an interlayer temperature control below 80°C; (5) During the arc swinging process, the liquid argon gas is controlled to be sprayed in liquid form on the surface of the deposit to ensure its temperature effect and accelerate its cooling effect. At the same time, due to the existence of the swinging, multiple melting and solidification effects are created in a very short time until the titanium alloy component is processed.

[0045] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that during the arc swinging process, liquid argon is not sprayed on the surface of the deposit in liquid form, and only conventional protective gas is used for anti-oxidation treatment, and the rest of the processes are exactly the same.

[0046] The metallographic diagrams of the titanium alloy components obtained in Example 1 and Comparative Example 1 are shown in FIG. Figure 4 and Figure 5 As shown, the electron backscattered original β grain maps of the titanium alloy components prepared in Example 1 and Comparative Example 1 are respectively as shown in Figure 6 and Figure 7 As shown. Combined Figure 5 and Figure 7 When comparative example 1 only uses arc swing without rapid cooling, the original β grains of the obtained TC4 titanium alloy are basically columnar crystals; Figure 4 and Figure 6 In Example 1, the arc swing process is used after the deposited layer is rapidly cooled, and the TC4 titanium alloy component obtained will have a certain degree of equiaxed grains.

[0047] like Figure 8 As shown, with the support of the grain, the mechanical properties of the arc swing sample under rapid cooling are almost reduced to the same in the horizontal and vertical directions, that is, the anisotropy is successfully weakened.

[0048] Example 2 The present application provides a method for preparing an equiaxed crystal reinforced titanium alloy component, comprising the following steps: (1) Use TC4 titanium alloy welding wire with an oxygen content of less than 0.1% as the raw material for arc additive, and fix the TC4 additive substrate; (2) Install the protective gas support box. There is a local protective gas inside the protective gas support box. The local protective gas is liquid argon. While avoiding oxidation of titanium alloy after welding, it greatly accelerates the cooling speed and increases the possibility of molten pool fluctuations; (3) Use the welding robot to set the arc swing trajectory. The arc swing amplitude is 1.5 mm, the frequency is 2 Hz, and it swings in a sinusoidal wave. (4) Use a welding robot to perform additive manufacturing on a titanium alloy substrate, with a controlled current of 180A, a voltage of 15V, a wire feeding speed of 1900mm / min, a welding moving speed of 3mm / s, and an interlayer temperature control below 80°C; (5) During the arc swinging process, the liquid argon gas is controlled to be sprayed in liquid form on the surface of the deposit to ensure its temperature effect and accelerate its cooling effect. At the same time, due to the existence of the swinging, multiple melting and solidification effects are created in a very short time until the titanium alloy component is processed.

[0049] Example 3 The present application provides a method for preparing an equiaxed crystal reinforced titanium alloy component, comprising the following steps: (1) Use TC4 titanium alloy welding wire with an oxygen content of less than 0.1% as the raw material for arc additive, and fix the TC4 additive substrate; (2) Install the protective gas support box. There is a local protective gas inside the protective gas support box. The local protective gas is liquid argon. While avoiding oxidation of titanium alloy after welding, it greatly accelerates the cooling speed and increases the possibility of molten pool fluctuations; (3) Use the welding robot to set the arc swing trajectory. The arc swing amplitude is 3 mm, the frequency is 2 Hz, and it swings in a sinusoidal wave. (4) Use a welding robot to perform additive manufacturing on a titanium alloy substrate, with a controlled current of 180A, a voltage of 15V, a wire feeding speed of 1900mm / min, a welding moving speed of 3mm / s, and an interlayer temperature control below 80°C; (5) During the arc swinging process, the liquid argon gas is controlled to be sprayed in liquid form on the surface of the deposit to ensure its temperature effect and accelerate its cooling effect. At the same time, due to the existence of the swinging, multiple melting and solidification effects are created in a very short time until the titanium alloy component is processed.

[0050] Example 4 The present application provides a method for preparing an equiaxed crystal reinforced titanium alloy component, comprising the following steps: (1) Use TC4 titanium alloy welding wire with an oxygen content of less than 0.1% as the raw material for arc additive, and fix the TC4 additive substrate; (2) Install the protective gas support box. There is a local protective gas inside the protective gas support box. The local protective gas is liquid argon. While avoiding oxidation of titanium alloy after welding, it greatly accelerates the cooling speed and increases the possibility of molten pool fluctuations; (3) Use the welding robot to set the arc swing trajectory. The arc swing amplitude is 4.5 mm, the frequency is 0.5 Hz, and it swings in a sinusoidal wave. (4) Use a welding robot to perform additive manufacturing on a titanium alloy substrate, with a control current of 350A, a voltage of 25V, a wire feeding speed of 1000mm / min, a welding moving speed of 10mm / s, and an interlayer temperature control below 80°C; (5) During the arc swinging process, the liquid argon gas is controlled to be sprayed in liquid form on the surface of the deposit to ensure its temperature effect and accelerate its cooling effect. At the same time, due to the existence of the swinging, multiple melting and solidification effects are created in a very short time until the titanium alloy component is processed.

[0051] Example 5 The present application provides a method for preparing an equiaxed crystal reinforced titanium alloy component, comprising the following steps: (1) Use TC4 titanium alloy welding wire with an oxygen content of less than 0.1% as the raw material for arc additive, and fix the TC4 additive substrate; (2) Install the protective gas support box. There is a local protective gas inside the protective gas support box. The local protective gas is liquid argon. While avoiding oxidation of titanium alloy after welding, it greatly accelerates the cooling speed and increases the possibility of molten pool fluctuations; (3) Use the welding robot to set the arc swing trajectory. The arc swing amplitude is 0.5 mm, the frequency is 4 Hz, and it swings in a sinusoidal wave. (4) Additive manufacturing was performed on titanium alloy substrates using a welding robot with a current of 250 A, a voltage of 20 V, a wire feeding speed of 1500 mm / min, a welding moving speed of 5 mm / s, and an interlayer temperature control below 80 °C. (5) During the arc swinging process, the liquid argon gas is controlled to be sprayed in liquid form on the surface of the deposit to ensure its temperature effect and accelerate its cooling effect. At the same time, due to the existence of the swinging, multiple melting and solidification effects are created in a very short time until the titanium alloy component is processed.

[0052] The equiaxed grain morphology ratio of the titanium alloy components obtained in Examples 1 to 5 and Comparative Example 1 was characterized. The equiaxed grain morphology ratio refers to the proportion of equiaxed crystals in all grains in the grain morphology. The results are shown in Table 1: Table 1. Crystalline proportions of titanium alloys obtained in Examples 1 to 5 and Comparative Example 1 Detection indicators Equiaxed crystal ratio (%) Example 1 95 Example 2 80 Example 3 60 Example 4 50 Example 5 70 Comparative Example 1 10 In summary, the present invention increases the temperature fluctuation effect by combining arc swing with rapid cooling, increases the proportion of equiaxed crystals in titanium alloy, weakens the anisotropy of titanium alloy components, and improves their comprehensive mechanical properties. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for preparing an equiaxed crystal reinforced titanium alloy component, characterized in that: Titanium alloy welding wire is used as raw material and arc additive manufacturing process is adopted to manufacture titanium alloy components. During the process of arc additive manufacturing of titanium alloy components, the arc is controlled to move in the form of sinusoidal wave swing, and the deposit is rapidly cooled until the titanium alloy component is completed.

2. The preparation method according to claim 1, characterized in that: The arc swing amplitude is controlled to be 0.5~6mm and the frequency is 0.5~4Hz.

3. The preparation method according to claim 1, characterized in that: The process parameters of arc additive manufacturing of titanium alloy components are: current 180~350A, voltage 15~25V, wire feeding speed 1000~1900mm / min, and welding moving speed 3~10mm / s.

4. The preparation method according to claim 1, characterized in that: The rapid cooling process uses liquid argon gas to be sprayed on the surface of the deposit in liquid form.

5. The preparation method according to claim 1, characterized in that: The titanium alloy welding wire is a TC4 welding wire with an oxygen content of less than 0.1%.

6. An equiaxed crystal reinforced titanium alloy component prepared by the preparation method according to any one of claims 1 to 5.

7. The equiaxed crystal reinforced titanium alloy component according to claim 6, characterized in that: The proportion of equiaxed crystals in the equiaxed crystal reinforced titanium alloy component is not less than 50%.

8. The equiaxed crystal reinforced titanium alloy component according to claim 6, characterized in that: The difference between the transverse tensile strength and the longitudinal tensile strength of the equiaxed crystal reinforced titanium alloy component is no more than 5 MPa.

9. Use of the equiaxed crystal reinforced titanium alloy component according to claim 6 in the field of aerospace.

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