Short-process preparation method of TiAl3 / Cu-Ti composite alloy bar

Abstract

The invention discloses a short-process preparation method of a TiAl3 / Cu-Ti composite alloy bar, and belongs to the technical field of copper alloys. The preparation method comprises the following steps: preparing Cu-Ti alloy powder and TiAl3 powder; the Cu-Ti alloy powder and the TiAl3 powder are mixed under the inert protective atmosphere; the mixed powder is heated to obtain a semi-solid mixture, the semi-solid mixture is extruded and quenched after being extruded, then the semi-solid mixture is further cooled to the room temperature, and a bar blank is obtained; and the bar blank is subjected to rotary swaging after being heated, then water quenching is conducted, and the TiAl3 / Cu-Ti composite alloy bar is obtained. According to the short-process preparation method of the TiAl3 / Cu-Ti composite alloy bar, Cu-Ti alloy powder and TiAl3 powder are adopted as raw materials, and the problem that TiAl3 particles are distributed unevenly is solved directly through semi-solid forming.

Description

Technical Field

[0001] The invention belongs to the technical field of copper alloys, and in particular relates to a short-process preparation method for a TiAl3 / Cu-Ti composite alloy bar. Background Art

[0002] Copper alloys are widely used in the industrial field. Among them, Cu-Be alloys are favored due to their excellent strength, elasticity, hardness, corrosion resistance, and non-magnetic properties. However, because Cu-Be alloys contain Be, an element that is potentially harmful to human health, the preparation process is complex. At the same time, the limited and expensive Be resources limit the application range of Cu-Be alloys. Therefore, there is a need to find a more environmentally friendly and low-cost alternative material. Current research shows that Cu-Ti alloys have good prospects in replacing Cu-Be alloys.

[0003] However, the performance of existing Cu-Ti alloys still needs to be improved, especially in terms of thermal stability, which needs to be further improved to meet more stringent engineering requirements. TiAl3 particles, as a strengthening phase, have the characteristics of high hardness and high melting point. They can be introduced into copper-based alloys and improve their comprehensive properties, including improving strength, hardness, and thermal stability to meet the requirements of specific industrial applications. However, there are the following problems in introducing TiAl3 particles into copper alloys: (1) TiAl3 particles are difficult to distribute uniformly in copper alloys. Since TiAl3 particles usually have a higher density than Cu, it is easy to cause uneven distribution of TiAl3 particles in copper alloys during the preparation process, resulting in inconsistent properties such as strength and hardness of the alloy, and reducing the overall performance. (2) The bond between Cu and TiAl3 particles is weak. Cu and TiAl3 particles are basically insoluble, which may lead to weak TiAl3 particle-Cu matrix bonding, which may cause particle shedding or interface failure during use, thereby reducing the performance of the alloy. (3) TiAl3 particles are prone to phase transformation with Cu. Since both Ti and Al in TiAl3 particles easily form metallic compounds with Cu, some reactions will occur at the interface between TiAl3 particles and Cu matrix to form new phases, resulting in a decrease in the number of TiAl3 particles and a weakening of the TiAl3 particle-Cu matrix bonding.

[0004] Therefore, developing a Cu-Ti alloy with TiAl3 added that can overcome the above technical problems is of great significance for the engineering application of copper alloys. Summary of the Invention

[0005] Based on this, and in view of the above-mentioned deficiencies in the prior art, a short-process preparation method for TiAl3 / Cu-Ti composite alloy rods is proposed.

[0006] In order to achieve the above objectives, the following technical solutions are adopted: The present invention provides a short-process preparation method of a TiAl3 / Cu-Ti composite alloy bar, comprising the following steps: S101, preparing Cu-Ti alloy powder and TiAl3 powder; S102, mixing Cu-Ti alloy powder and TiAl3 powder under an inert protective atmosphere; S103, heating the mixed powder to obtain a semi-solid mixture, extruding the semi-solid mixture, quenching the semi-solid mixture after extrusion, and then further cooling it to room temperature to obtain a rod blank; S104, heating the rod blank, rotary forging it, and then water quenching it to obtain a TiAl3 / Cu-Ti composite alloy rod.

[0007] In some embodiments, in step S101, Cu-Ti alloy powder and TiAl3 powder are prepared by aerosol method; the particle size of Cu-Ti alloy powder is 20-40 μm, and the particle size of TiAl3 powder is 5-15 μm.

[0008] In some embodiments, the Cu-Ti alloy powder is an alloy containing 3 wt % Ti.

[0009] In some embodiments, in step S102, based on the total mass of the mixed powder, the Cu-Ti alloy powder accounts for 90% to 95%, and the TiAl3 powder accounts for 5% to 10%.

[0010] In some embodiments, in step S102, the inert protective atmosphere is nitrogen, argon or helium, and the mixing is performed mechanically.

[0011] In some embodiments, in step S103 , the mixed powder is heated to a temperature of 950-1050° C., the pressure for extruding the semi-solid mixture is 120-150 MPa, and the holding time is 10-20 min.

[0012] In some embodiments, in step S104, the temperature at which the rod blank is heated is 800-900° C., and the four-die rotary forging machine is used for rotary forging at a rotation speed of 250 r / min.

[0013] In some embodiments, in step S103, a horizontal forward Cu alloy extruder and an inclined feeding trough are used, and the powder is fed by its own weight. The powder is heated by an induction heater to obtain a semi-solid mixture. At the same time, the valve is closed and the semi-solid mixture is extruded by a piston; then the valve is opened, and the semi-solid mixture is extruded through a die, quenched by water spray, and then further cooled to room temperature through a water tank.

[0014] In some embodiments, the water temperature for water spray quenching is 20-40° C., and the quenching time is 5-10 seconds.

[0015] In some embodiments, the rod blank is a rod blank with a diameter of 6-8 mm, and the TiAl3 / Cu-Ti composite alloy rod is a rod with a diameter of 3-5 mm.

[0016] The present invention has the following beneficial technical effects: The short-process preparation method for a TiAl3 / Cu-Ti composite alloy rod of the present invention utilizes Cu-Ti alloy powder and TiAl3 powder as raw materials and directly performs semi-solid forming, thereby overcoming the problem of uneven TiAl3 particle distribution. The use of semi-solid extrusion molding improves the problem of weak bonding between the TiAl3 particles and the Cu matrix. By heating the TiAl3 and Cu-Ti mixed powder to obtain a TiAl3 and Cu-Ti semi-solid mixture, the gaps between the TiAl3 particles and the Cu-Ti particles can be reduced, thereby increasing the contact area between the particles and the matrix. By controlling the deformation temperature, phase transition between the TiAl3 particles and Cu is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Flowchart of the short-process preparation method of the TiAl3 / Cu-Ti composite alloy rod of the present invention; Figure 2 Schematic diagram of a short-process preparation method of a TiAl3 / Cu-Ti composite alloy rod of the present invention; Figure 3 These are scanning electron microscope images of the TiAl3 / Cu-Ti composite alloy rods according to the embodiments of the present invention; wherein, (a) is a scanning electron microscope image of the TiAl3 / Cu-Ti composite alloy rod of Example 1; and (b) is a scanning electron microscope image of the TiAl3 / Cu-Ti composite alloy rod of Example 2. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0020] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in the present invention, it is readily apparent to those skilled in the art that various modifications are feasible without departing substantially from the teachings of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, variations, and deletions may be made to the design, operating conditions, and parameters of the following exemplary embodiments.

[0021] The present invention aims to address the difficulty in uniformly distributing TiAl3 particles in Cu alloys. Because TiAl3 particles typically have a higher density than Cu, uneven distribution of TiAl3 particles in the Cu alloy can easily occur during the preparation process, leading to inconsistent properties such as strength and hardness, and reducing overall performance.

[0022] The present invention aims to address the problem of weak bonding between Cu and TiAl3 particles. The substantial immiscibility of Cu and TiAl3 particles can lead to a weak TiAl3 particle-Cu matrix bond, potentially causing particle shedding or interface failure during use, thereby degrading the alloy's performance.

[0023] The present invention addresses the problem of TiAl3 particles easily undergoing phase transformation with Cu. Because both the Ti and Al in the TiAl3 particles readily form metallic compounds with Cu, reactions occur at the interface between the TiAl3 particles and the Cu matrix, forming new phases that reduce the number of TiAl3 particles and weaken the bond between the TiAl3 particles and the Cu matrix.

[0024] Based on the above objectives, a first aspect of an embodiment of the present invention provides a short-process preparation method for TiAl3 / Cu-Ti composite alloy rods. Figure 1 Shown is a schematic flow chart of the method.

[0025] The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod comprises the following steps: S101, preparing Cu-Ti alloy powder and TiAl3 powder; S102, mixing Cu-Ti alloy powder and TiAl3 powder under an inert protective atmosphere; S103, heating the mixed powder to obtain a semi-solid mixture, extruding the semi-solid mixture, quenching the semi-solid mixture after extrusion, and then further cooling it to room temperature to obtain a rod blank; S104, heating the rod blank, rotary forging it, and then water quenching it to obtain a TiAl3 / Cu-Ti composite alloy rod.

[0026] In a preferred embodiment of the present invention, in step S101, Cu-Ti alloy powder and TiAl3 powder are prepared by an aerosol method; the particle size of the Cu-Ti alloy powder is 20-40 μm, and the particle size of the TiAl3 powder is 5-15 μm.

[0027] In a preferred embodiment of the present invention, the Cu-Ti alloy powder is an alloy containing 3 wt % Ti.

[0028] In a preferred embodiment of the present invention, in step S102, based on the total mass of the mixed powder, the Cu-Ti alloy powder accounts for 90% to 95%, and the TiAl3 powder accounts for 5% to 10%.

[0029] In a preferred embodiment of the present invention, in step S102, the inert protective atmosphere is nitrogen, argon or helium, and the mixing is performed mechanically.

[0030] Specifically, mechanical mixing can be performed by paddle stirring, turbine stirring, or electromagnetic stirring, preferably electromagnetic stirring, to ensure uniform dispersion of the powder.

[0031] In a preferred embodiment of the present invention, in step S103, the mixed powder is heated to a temperature of 950-1050°C, the pressure for extruding the semi-solid mixture is 120-150 MPa, and the holding time is 10-20 minutes.

[0032] In some embodiments, in step S103, a horizontal forward Cu alloy extruder and an inclined feeding trough are used, and the powder is fed by its own weight. The powder is heated by an induction heater to obtain a semi-solid mixture. At the same time, the valve is closed and the semi-solid mixture is extruded by a piston; then the valve is opened, and the semi-solid mixture is extruded through a die, quenched by water spray, and then further cooled to room temperature through a water tank.

[0033] like Figure 2 Figure 2 shows a schematic diagram of a short-process method for preparing TiAl3 / Cu-Ti composite alloy rods. Cu-Ti alloy powder and TiAl3 powder are added to a horizontal forward Cu alloy extruder via an inclined feed trough, where the powders are fed by weight. The powders in the horizontal forward Cu alloy extruder are heated by an induction heater to form a semi-solid mixture. The feed valve is closed, and the semi-solid mixture is extruded by a piston. The valve is then opened, and the semi-solid mixture is extruded through a die. Water spray quenching is performed, and the rods are then cooled to room temperature in a water tank. The rods are heated to 800-900°C in a tubular furnace, rotary forged using a four-die rotary forging machine, and then water quenched to produce φ3-5 mm rods, which are then coiled.

[0034] During semi-solid extrusion molding, the temperature is controlled to avoid the formation temperature range of Cu-Ti and Cu-Al compounds to inhibit the interface reaction between TiAl3 particles and Cu matrix.

[0035] The heating rate of the induction heater is 5-10℃ / s, ensuring that the powder is evenly heated to the semi-solid temperature range.

[0036] The outlet diameter of the extrusion die is 6-8 mm. During the extrusion process, the semi-solid mixture is pushed by the piston to achieve directional forming.

[0037] The tilt angle of the inclined feeding trough is 30°-60°, which uses the powder's own weight to achieve continuous feeding and avoid external forces interfering with mixing uniformity.

[0038] In a preferred embodiment of the present invention, in step S104, the temperature of heating the rod blank is 800-900° C., and the four-die rotary forging machine is used for rotary forging at a rotation speed of 250 r / min.

[0039] During the high-temperature rotary forging process, the rotary forging deformation is 30%-50%, and precise control of the bar size is achieved through multi-mode continuous rotary forging.

[0040] Specifically, the billet can be heated by a tube furnace.

[0041] In a preferred embodiment of the present invention, the water temperature of the water spray quenching is 20-40° C. and the quenching time is 5-10 seconds, so as to ensure that the semi-solid mixture solidifies quickly.

[0042] In some embodiments, the rod blank is a rod blank with a diameter of 6-8 mm, and the TiAl3 / Cu-Ti composite alloy rod is a rod with a diameter of 3-5 mm.

[0043] "φ" is a special symbol for the diameter of a round object. For example, "φ6-8mm" indicates the diameter range, that is, the diameter of the rod blank is between 6 mm and 8 mm.

[0044] The present invention uses Cu-Ti powder and TiAl3 powder as raw materials and intends to prepare Cu-Ti alloy rods containing TiAl3 particles by powder semi-solid extrusion molding. Compared with the manufacturing methods of the prior art, this method has the following advantages: Using Cu-Ti nanopowder and TiAl3 nanopowder as raw materials, direct semi-solid forming overcomes the problem of uneven TiAl3 particle distribution. By stirring and thoroughly mixing the Cu-Ti and TiAl3 powders, the TiAl3 is evenly distributed throughout the Cu-Ti powder. Furthermore, semi-solid forming avoids sinking of TiAl3 particles in the Cu-Ti molten liquid due to density differences. This effectively overcomes the problem of uneven TiAl3 particle distribution in the Cu-Ti alloy.

[0045] Semi-solid extrusion improves the weak bonding between TiAl3 particles and the Cu matrix. By heating the TiAl3 and Cu-Ti mixed powder to form a semi-solid mixture of TiAl3 and Cu-Ti, the gaps between the TiAl3 and Cu-Ti particles are reduced, increasing the contact area between the particles and the matrix. Furthermore, during the extrusion process, the TiAl3 particles undergo plastic deformation, which changes their shape and adjusts their orientation, helping to improve the mechanical locking between the particles and the Cu matrix, thereby strengthening the bond between the TiAl3 particles and the Cu matrix.

[0046] By controlling the deformation temperature, phase transitions between the TiAl3 particles and Cu are avoided. Keeping the temperature outside the range where Cu-Ti and Cu-Al compounds form effectively prevents reactions at the interface between the TiAl3 particles and the Cu matrix, minimizing TiAl3 particle loss and further improving the weak bonding between the TiAl3 particles and the Cu matrix.

[0047] The semi-solid forming process prevents TiAl3 particles from sinking due to density differences, and at the same time, extrusion plastic deformation enhances the mechanical locking between the particles and the matrix, solving the problems of uneven particle distribution and weak bonding in the existing technology.

[0048] The present invention is further illustrated by the following examples. Tables 1-3 show the properties of the TiAl3 / Cu-Ti composite alloy rods of Examples 1-3.

[0049] Tensile strength is the maximum tensile stress a material can withstand from the beginning of its extension to the point of fracture, measured in MPa (megapascals). When the tensile force on a material reaches its tensile strength, it begins to neck and eventually fracture.

[0050] Conductivity / %IACS is an important indicator for measuring a material's electrical conductivity, with higher values ​​indicating better conductivity. %IACS, or the percentage of the International Annealed Copper Standard, is a unit of electrical conductivity. This standard is based on the conductivity of International Annealed Copper, defined as 100%IACS. For other metals, their conductivity can be calculated by comparing it to the conductivity of International Annealed Copper and converting it into a %IACS value. In practical applications, a high %IACS value indicates improved electron transfer efficiency and electrical conductivity, which is crucial for applications requiring high-quality, highly conductive metals. Therefore, when selecting alloys, materials with higher %IACS values ​​are generally preferred.

[0051] Elongation refers to the percentage of the total elongation of a material after tensile fracture to the original gauge length, and is used to characterize the plastic deformation capacity of the material.

[0052] Elastic modulus refers to the ratio of stress to strain of a material during its elastic deformation stage. It measures the stress required for the material to produce unit strain. The larger the value, the "harder" the material and the more difficult it is to undergo elastic deformation.

[0053] Example 1 (1) Powder preparation and mixing The raw materials were Cu-Ti alloy powder and TiAl3 powder prepared by aerosol method. The Cu-Ti powder had a particle size of 20 μm and the TiAl3 powder had a particle size of 5 μm. The powders were mixed in a ratio of Cu-3Ti powder to 5% TiAl3 powder and mechanically mixed under an inert protective atmosphere.

[0054] (2) Powder semi-solid extrusion molding A horizontal, forward-feeding Cu alloy extruder with an inclined feed chute was used, feeding the powder by weight. The powder was heated to 950°C by an induction heater to obtain a semi-solid mixture. Simultaneously, the valve was closed and the semi-solid mixture was extruded by a piston at a pressure of 120 MPa for 10 minutes. The valve was then opened, and the semi-solid mixture was extruded through a die. The mixture was then quenched by water spray and further cooled to room temperature in a water tank to produce a φ6 mm rod.

[0055] (3) High temperature rotary forging The rod blank in (2) was heated to 800℃ in a tubular furnace and forged using a four-die rotary forging machine at a rotation speed of 250r / min. It was then water quenched to obtain a φ3mm TiAl3 / Cu-Ti composite alloy rod, which was finally coiled.

[0056] Table 1. Properties of the TiAl3 / Cu-Ti composite alloy rod of Example 1

[0057] Example 2 (1) Powder preparation and mixing The raw materials were Cu-Ti alloy powder and TiAl3 powder prepared by aerosol method. The Cu-Ti powder had a particle size of 30 μm, and the TiAl3 powder had a particle size of 10 μm. The powders were mixed in a ratio of Cu-3Ti powder to 7% TiAl3 powder and mechanically mixed under an inert protective atmosphere.

[0058] (2) Powder semi-solid extrusion molding A horizontal, forward-feeding Cu alloy extruder with an inclined feed chute was used, feeding the powder by weight. The powder was heated (1000°C) by an induction heater to form a semi-solid mixture. Simultaneously, the valve was closed and the semi-solid mixture was extruded by a piston at a pressure of 130 MPa for 15 minutes. The valve was then opened, and the semi-solid mixture was extruded through a die. The mixture was then quenched by water spray and further cooled to room temperature in a water tank to produce a φ6 mm billet.

[0059] (3) High temperature rotary forging The rod blank in (2) was heated to 850℃ in a tubular furnace and forged using a four-die rotary forging machine at a rotation speed of 250r / min. It was then water quenched to obtain a φ4mm TiAl3 / Cu-Ti composite alloy rod, which was finally coiled.

[0060] Table 2. Properties of TiAl3 / Cu-Ti composite alloy rods of Example 2

[0061] Example 3 (1) Powder preparation and mixing The raw materials are Cu-Ti alloy powder and TiAl3 powder prepared by aerosol method. The Cu-Ti powder has a particle size of 40μm and the TiAl3 powder has a particle size of 15μm. The powders are mixed in the ratio of Cu-3Ti powder to 9% TiAl3 powder and mechanically mixed under an inert protective atmosphere.

[0062] (2) Powder semi-solid extrusion molding A horizontal, forward-feeding Cu alloy extruder with an inclined feed chute was used, feeding the powder by weight. The powder was heated (1050°C) by an induction heater to obtain a semi-solid mixture. Simultaneously, the valve was closed and the semi-solid mixture was extruded by a piston at a pressure of 140 MPa for 20 minutes. The valve was then opened, and the semi-solid mixture was extruded through a die. The mixture was then quenched by water spray and further cooled to room temperature in a water tank to produce a 7 mm φ billet.

[0063] (3) High temperature rotary forging The rod blank in (2) was heated to 900 °C in a tubular furnace and forged using a four-die rotary forging machine at a rotation speed of 250 r / min. It was then water quenched to obtain a φ5 mm TiAl3 / Cu-Ti composite alloy rod, which was finally coiled.

[0064] Table 3. Properties of TiAl3 / Cu-Ti composite alloy rods of Example 3

[0065] like Figure 3 Shown are scanning electron microscope images of TiAl3 / Cu-Ti composite alloy rods of Examples 1 and 2 of the present invention; wherein, (a) is a scanning electron microscope image of the TiAl3 / Cu-Ti composite alloy rod of Example 1; (b) is a scanning electron microscope image of the TiAl3 / Cu-Ti composite alloy rod of Example 2.

[0066] from Figure 3As can be seen in the figure, the area with dark, larger particles on the copper matrix is ​​TiAl3. It can be seen that in the TiAl3 / Cu-Ti composite alloy, TiAl3 is evenly distributed throughout the alloy. The short-process preparation method for the TiAl3 / Cu-Ti composite alloy rod of the present invention overcomes the problem of uneven TiAl3 particle distribution, improves the problem of weak bonding between TiAl3 particles and the Cu matrix, reduces the gaps between TiAl3 particles and Cu-Ti particles, and increases the contact area between the particles and the matrix. The TiAl3 has clear edges, which prevents phase transformation between the TiAl3 particles and Cu.

[0067] The above are exemplary embodiments disclosed in the present invention, but it should be noted that various changes and modifications may be made without departing from the scope of the embodiments disclosed in the claims. Although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as plural unless expressly limited to the singular.

[0068] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the disclosure of the present invention (including the claims) to these examples. Within the spirit of the present invention, the technical features of the above embodiments or different embodiments may be combined, and many other variations exist in different aspects of the above embodiments, which are not provided in detail for the sake of clarity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A short-process preparation method for TiAl3 / Cu-Ti composite alloy rods, characterized in that: The following steps are involved: S101, preparing Cu-Ti alloy powder and TiAl3 powder; S102, mixing Cu-Ti alloy powder and TiAl3 powder under an inert protective atmosphere; S103, heating the mixed powder to obtain a semi-solid mixture, extruding the semi-solid mixture, quenching the semi-solid mixture after extrusion, and then further cooling it to room temperature to obtain a rod blank; S104, heating the rod blank, rotary forging it, and then water quenching it to obtain a TiAl3 / Cu-Ti composite alloy rod.

2. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 1, characterized in that: In step S101, Cu-Ti alloy powder and TiAl3 powder are prepared by an aerosol method; the particle size of the Cu-Ti alloy powder is 20-40 μm, and the particle size of the TiAl3 powder is 5-15 μm.

3. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 2, characterized in that: The Cu-Ti alloy powder contains 3 wt % Ti.

4. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 1, characterized in that: In step S102, based on the total mass of the mixed powder, the Cu-Ti alloy powder accounts for 90% to 95%, and the TiAl3 powder accounts for 5% to 10%.

5. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 1, characterized in that: In step S102, the inert protective atmosphere is nitrogen, argon or helium, and the mixing is performed mechanically.

6. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 1, characterized in that: In step S103, the mixed powder is heated to a temperature of 950-1050°C, the pressure of the semi-solid mixture is extruded to a pressure of 120-150 MPa, and the holding time is 10-20 minutes.

7. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 1, characterized in that: In step S104, the temperature of heating the rod blank is 800-900° C., and the four-die rotary forging machine is used for rotary forging at a rotation speed of 250 r / min.

8. The short-process preparation method of TiAl3 / Cu-Ti composite alloy rod according to claim 6, characterized in that: In step S103, a horizontal forward Cu alloy extruder and an inclined feeding trough are used, and the powder is fed by its own weight. The powder is heated by an induction heater to obtain a semi-solid mixture. At the same time, the valve is closed and the semi-solid mixture is extruded by a piston; then the valve is opened, and the semi-solid mixture is extruded through a die, quenched by water spray, and then further cooled to room temperature through a water tank.

9. The short-process preparation method of the TiAl3 / Cu-Ti composite alloy rod according to claim 8, characterized in that: The water temperature for water spray quenching is 20-40℃ and the quenching time is 5-10s.

10. The short-process preparation method of the TiAl3 / Cu-Ti composite alloy rod according to claim 1, characterized in that: The rod blank is a rod blank of φ6-8 mm, and the TiAl3 / Cu-Ti composite alloy rod is a rod of φ3-5 mm.

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