Production method of titanium-aluminum composite plate strip

Abstract

The invention discloses a production method of a titanium-aluminum composite plate strip, the production method of the titanium-aluminum composite plate strip comprises a titanium plate strip and an aluminum plate strip, the purity of the titanium plate strip and the purity of the aluminum plate strip are both larger than or equal to 99.4%, and the production method comprises the following steps that pretreatment is conducted, specifically, the titanium plate strip is pretreated; polishing: polishing the titanium plate strip and the aluminum plate strip; the titanium plate strip is coated with liquid metal, and the aluminum plate strip is pre-treated; in the atmosphere of inert gas and hydrogen, the titanium plate strip is heated to 450-550 DEG C, and the aluminum plate strip is heated to 320-450 DEG C; rolling is conducted, specifically, the heated titanium plate strip and the heated aluminum plate strip are rolled after being attached, and ultrasonic vibration is applied to the titanium plate strip in the rolling process; the rolled plate strip is subjected to annealing treatment; and cooling is conducted, specifically, the annealed plate strip is cooled to the room temperature under the condition that the temperature reduction speed is 30-40 DEG C / h, and the titanium-aluminum composite plate strip is obtained. The compounding method of the titanium plate strip and the aluminum plate strip has the advantages that the interface bonding strength is high, the production width is increased, and continuous production can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal plate and strip manufacturing, and in particular relates to a production method of a titanium-aluminum composite plate and strip. Background Art

[0002] Titanium-aluminum composite sheet and strip is a layered composite material formed by combining titanium and aluminum layers through a specific process. It combines the high strength and corrosion resistance of titanium with the lightweight, high electrical and thermal conductivity of aluminum, and is widely used in aerospace, electronics, chemical engineering, transportation, and other fields. Titanium-aluminum composite sheet and strip retains the excellent properties of titanium while reducing material costs and improving processing performance, making it a new composite material with great development potential. However, the significant differences in the physical and chemical properties of titanium and aluminum lead to numerous technical challenges in the composite process. Achieving the production of high-strength, large-scale, and efficient titanium-aluminum composite sheet and strip has become a pressing issue for the industry.

[0003] At present, the segmented rolling composite method is a feasible process solution for preparing rod-shaped titanium-aluminum composite materials. This process first carries out surface pretreatment operations on the titanium and aluminum strips to remove the oxide layer on the surface of the materials and improve their surface activity. Afterwards, the two materials are composited by segmented heating and rolling. The specific process flow is: first heat the titanium strip to a suitable temperature to enhance its plasticity; at the same time, keep the aluminum strip at a lower temperature to maintain its strength. Subsequently, the two are sent to the rolling mill for multiple rolling passes, and the rolling pressure is used to promote plastic deformation of the titanium-aluminum interface, thereby forming a metallurgical bond. Finally, the interface performance is optimized through subsequent heat treatment processes. The advantage of this process method is that it can use rolling deformation to promote interface bonding, and at the same time, through temperature segmentation control, effectively reduce the stress problems caused by the difference in thermal expansion of titanium and aluminum, thereby improving the overall performance of the composite material.

[0004] However, although the segmented rolling composite method has shown certain advantages in the preparation of titanium aluminum rod composites, there are still some key problems that limit the improvement of composite material performance and industrial application: First, the interface bonding strength is poor. Given the significant differences in physical properties between titanium and aluminum sheets, it is very easy for the two to deform inconsistently during the rolling process, resulting in a weak interface bonding. Titanium sheets have a high yield strength, which makes them less capable of plastic flow during rolling; while aluminum sheets have a relatively low softening temperature and are prone to excessive deformation under high-temperature rolling conditions. Coordinated deformation between the two is difficult, ultimately leading to unstable interface bonding strength. II. The segmented rolling process requires multiple passes of rolling and multiple heating operations for titanium and aluminum plate strips. In this process, the material temperature drops rapidly, and the deformation resistance fluctuates greatly. The hot working range of titanium plate strips is extremely narrow. In particular, when wide plate strips are rolled, the temperature gradient between the edge and the center of the material is obvious, which easily causes local deformation incoordination, thereby affecting the uniformity of the interface bonding and the thickness of the brittle TiAl3 layer. For example, when titanium plate strips are wide-rolled, uneven grain structures are easily formed due to rapid temperature drop, which makes it difficult to effectively control the flatness of the plate.

[0005] III. It is difficult to realize continuous production. The segmented rolling composite method involves multiple heating, rolling and cooling process steps, which is complicated and difficult to directly connect with subsequent processing links. Due to the need for temperature segmented control in the titanium-aluminum composite process, the production efficiency is low, which cannot meet the demand of the consumer electronics industry for mass production and low cost SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a production method of titanium-aluminum composite plate strips.

[0007] To achieve the above-mentioned purpose of the application, the technical scheme adopted by the present application comprises: A production method of titanium-aluminum composite plate strips, including titanium plate strips and aluminum plate strips, the purity of the titanium plate strips and the aluminum plate strips is ≥ 99.4%, comprising the following steps: Pre-treatment: treating the titanium plate strips at 800-850℃ for 20-25min; then oil quenching; treating the titanium plate strips after oil quenching at 450-550℃ for 40-60min; finally treating in an oxygen-free gas at -25℃ to -20℃ for 5-6min; Polishing: polishing the surface of the titanium plate strips used for bonding with the aluminum plate strips to form a titanium polishing surface with a roughness of 9-18μm, and polishing the surface of the aluminum plate strips used for bonding with the titanium plate strips to form an aluminum polishing surface, the roughness of the aluminum polishing surface = the roughness of the titanium polishing surface along the rolling direction - (4-8)μm; Liquid metal transition layer preparation: coating a Ga-In-Sn alloy layer on the titanium plate strip polishing surface, the component ratio is Ga 61-65wt%, In 22-26wt%, Sn 12-15wt%, the coating thickness is 0.5-1μm, and the coverage is ≥ 95%; Pre-cooling rolling treatment: applying a plastic deformation of 3-5% along the rolling direction to the aluminum plate strips at room temperature, the pre-stretching force = the yield strength of the aluminum plate strips x (1.05-1.2) x the cross-sectional area; Heating: heating the titanium plate strips to 450-550℃ and heating the aluminum plate strips to 320-450℃ under the protection of inert gas and hydrogen gas; Rolling: the polished surface of the heated titanium plate strip and the heated aluminum plate strip are bonded and rolled, the rolling force is ≤ titanium raw material normal temperature yield strength × (0.63-0.7) × width × length of rolling area, in the rolling process, the aluminum plate strip is subjected to a tensile force in the opposite direction of the rolling direction, the tensile force = aluminum plate strip tensile strength × (5%-7%) × cross-sectional area of the aluminum plate strip, and a semi-finished strip is obtained after rolling; in the rolling process, ultrasonic vibration along the rolling direction is applied to the titanium plate strip, the vibration frequency is 20-40 kHz, the amplitude is 5-15 μm, and the vibration energy density is 0.8-1.5 J / cm 2 ·s; Post-processing: the rolled plate strip is annealed, the annealing temperature is 450-550 ℃, and the annealing time is 1-5 h; Cooling: the annealed plate strip is cooled to room temperature at a temperature drop speed of 30-40 ℃ / h, and a titanium-aluminum semi-solid composite plate strip is obtained.

[0008] In the pretreatment step of the present application, the titanium plate strip is treated at 800-850 ℃, which can form a uniform α+β dual-phase structure in the titanium plate strip, avoid excessive growth of β grains, and dissolve part of primary α phase, thereby providing a uniform solid solution base for subsequent quenching; the post-oil quenching can inhibit β phase decomposition, form metastable α' martensite phase and undercooled β phase, improve the hardness and strength of the material, and retain certain plasticity, thereby providing high-activity structure for subsequent aging and rolling composite; the titanium plate strip after oil quenching is treated at 450-550 ℃, which promotes decomposition of the metastable α' martensite and undercooled β phase, precipitates fine secondary α phase and stable β phase, significantly improves the yield strength and toughness of the titanium plate strip, reduces residual stress, and avoids interface cracking caused by internal stress during rolling; the subsequent treatment in an oxygen-free gas at-25 ℃ to-20 ℃ can prevent oxidation of the surface of the titanium plate strip and avoid poor interface bonding caused by the oxidation film during rolling composite.

[0009] In the polishing step of the present application, the surface of the titanium plate strip used for bonding with the aluminum plate strip is polished to form a titanium polished surface, and the surface of the aluminum plate strip used for bonding with the titanium plate strip is polished to form an aluminum polished surface; after polishing, the surfaces of the titanium plate strip and the aluminum plate strip can form uneven textures; the aluminum plate strip is good at extending after heating, and the uneven textures on the surfaces of the titanium plate strip and the aluminum plate strip are beneficial to deformation of the aluminum to fill the micropores, so that the titanium plate strip and the aluminum plate strip form a more firm metallurgical bond; the roughness value of the aluminum polished surface is lower than that of the titanium polished surface, and the titanium plate strip is basically not deformed during rolling, so that the greater roughness has no obvious effect on the aluminum.

[0010] In the preparation step of the liquid metal transition layer, the Ga-In-Sn alloy layer forms a semi-liquid film at the rolling temperature, which can effectively dissolve the titanium surface oxide layer and promote the interdiffusion of titanium and aluminum atoms, significantly improve the interface bonding strength, and ensure the wetting performance of the ratio components, which can form a continuous coverage on the microscopically rough surface and eliminate the interface gap. Compared with the traditional mechanical bonding method, the liquid metal transition layer can realize atomic-level close contact, reduce the generation of brittle intermetallic compounds, effectively reduce the thickness of the brittle layer at the titanium-aluminum interface, and greatly improve the interface bonding strength. The fluidity of the transition layer helps to coordinate the deformation difference between titanium and aluminum during rolling and relieve the interface stress concentration. At the same time, this chemical auxiliary bonding method and the subsequent ultrasonic vibration produce a synergistic effect, further optimizing the interface metallurgical bonding quality.

[0011] In the pre-stretching treatment step of the application, a uniform distribution of dislocation structure is formed in the aluminum plate strip by controlled plastic deformation, which effectively improves the material flow characteristics during subsequent rolling. The work hardening effect produced by pre-stretching can balance the deformation resistance difference between titanium and aluminum layers during high-temperature rolling, avoiding the interface shear failure caused by excessive softening of the aluminum layer. The directional stress field formed by this pretreatment process can significantly offset the interface residual stress caused by the difference in thermal expansion coefficient during composite rolling, thereby reducing the warping tendency of the composite plate strip. The pre-stretching treatment also optimizes the crystal orientation arrangement of the aluminum surface, making it easier to form coherent bonding with the titanium surface and significantly improving the interface bonding strength. Compared with the simple heating softening process, the pre-stretching treatment can more accurately regulate the mechanical state of aluminum, creating ideal conditions for subsequent ultrasonic-assisted rolling. This technology forms a synergistic effect with the liquid metal transition layer, promoting the diffusion of interface atoms and providing a material basis for the preparation of high-performance titanium-aluminum semi-solid composite plate strips.

[0012] In the heating step of the present application, since in the prior art, the strip is usually heated in a heating furnace, in the titanium-aluminum strip composite technology, multiple peeling treatments are often required due to oxidation problems, increasing the process, and the titanium-aluminum strip needs to be subjected to multiple peeling treatments during the composite process. In the present application, the contact area of the small protrusions on the surface of the strip with air is large, and it is more easily oxidized. The present application uses inert gas containing a small amount of hydrogen as protective gas to prevent the surface of the hot strip from being oxidized, while at the same time consuming the oxidizing components in the furnace and on the metal surface, thereby ensuring that the composite interface is free of oxygen elements, which is beneficial to simplify the production process of the composite titanium-aluminum strip, and is beneficial to realize the continuous production of the composite titanium-aluminum strip, thereby improving the production efficiency. The inert gas is specifically selected from nitrogen (N2) and argon (Ar), and hydrogen is the lightest gas. Under the condition of heating, the hydrogen molecule moves at the fastest speed, and the heat transfer efficiency is higher than that of nitrogen and argon. The high heat transfer efficiency of the protective gas can quickly transfer heat, making the temperature distribution of the composite interface more uniform, and avoiding the thermal stress caused by the difference in the thermal expansion coefficient of titanium and aluminum due to local overheating or overcooling. Thermal stress is the main inducement of interface cracks, and reducing thermal stress can significantly improve the composite strength. The yield strength of titanium strip at 700 DEG C is about 70% of the yield strength at room temperature. At a higher temperature, there is a certain probability that the titanium strip will undergo uncontrollable changes. Therefore, the heating temperature of titanium in the present application is controlled at 450-550 DEG C, which provides as much energy as possible for the composite process without causing processing stress due to deformation of the titanium strip.

[0013] In the rolling step of the present application, since the titanium strip is fully heated, it contains sufficient energy, and at the same time, the rolling force of the roller can also provide energy, ensuring that the titanium strip and the aluminum strip can obtain sufficient energy during rolling, thereby rapidly penetrating each other to form an intermediate compound and realize metallurgical bonding, thereby ensuring the bonding strength. At the same time, ultrasonic vibration can effectively break the oxide film on the surface of titanium, fully expose fresh metal atoms, and significantly improve the interface bonding strength. The microjet generated by the ultrasonic cavitation effect can remove the interface residual impurities, and the vibration energy promotes the mutual diffusion between titanium and aluminum atoms to form a more uniform metallurgical bonding layer. This dynamic energy input method is more conducive to eliminating interface defects than static rolling, and is particularly suitable for the production of high-precision composite strips. The vibration action also reduces the deformation resistance of titanium, making the rolling force distribution more uniform and avoiding interface cracking caused by local stress concentration. The thermal effect caused by ultrasonic vibration can compensate for the temperature fluctuations in the rolling area, maintaining stable plastic deformation conditions. This technology forms a synergistic effect with the liquid metal transition layer and pre-stretching treatment to obtain better interface performance without increasing heat input, and does not introduce additional thermal stress. Ultrasonic vibration assisted rolling provides an innovative physical field assisted means for preparing high performance titanium-aluminum semi-solid composite strip, which can more effectively control the interface bonding quality compared with traditional processes.

[0014] In the present application, the annealing temperature is 450-550 DEG C, at which temperature the intermolecular compound on the bonding interface of the titanium plate strip and the aluminum plate strip grows further, which is beneficial to further improve the bonding strength.

[0015] Preferably, the volume ratio of the hydrogen to the inert gas is 1: (12-30).

[0016] In the present application, the low concentration of hydrogen can significantly inhibit the formation of hydride and avoid the precipitation of hydride, thereby maintaining the toughness of the composite interface. At the same time, although hydrogen has reducing property, excessive hydrogen may excessively reduce the surface oxide of titanium / aluminum, which may weaken the metallurgical bonding. The low hydrogen concentration in the present application can moderately clean the surface without destroying the transition layer function of the oxide film, and promote the diffusion bonding. In addition, high hydrogen protective gas may cause hydrogen absorption of titanium material, which requires additional vacuum annealing to remove hydrogen; low hydrogen concentration can avoid this step and shorten the production cycle.

[0017] Preferably, the length of the rolling zone is 30-60 mm.

[0018] Preferably, the width of the titanium plate strip is 0.5-1.4 m.

[0019] Preferably, the thickness of the titanium plate strip is 1.6-2.5 mm.

[0020] Preferably, the thickness ratio of the titanium plate strip to the aluminum plate strip is 1: (1.25-1.875).

[0021] Preferably, the roughness of the titanium polishing surface perpendicular to the rolling direction is ≤1 / 3 of the roughness of the titanium polishing surface along the rolling direction.

[0022] In the present application, the roughness of the titanium polishing surface perpendicular to the rolling direction is increased, which is beneficial to increase the contact area of titanium and aluminum, and make the bonding more closely.

[0023] Preferably, the roughness of the aluminum polishing surface = the roughness of the titanium polishing surface perpendicular to the rolling direction x (1.5-2).

[0024] Preferably, when polishing the titanium plate strip, the surface of titanium is first laser textured, the texture of laser texturing is perpendicular to the rolling direction, and then wet polishing is performed along the direction perpendicular to the rolling direction by using a sand belt.

[0025] In the present application, the combination of solid solution-quenching-ageing-deep cooling realizes the balance of the strength, plasticity and interface activity of the titanium plate strip, which is especially suitable for the rolling of titanium-aluminum composite plate with high precision requirement, and can significantly improve the anti-peeling performance and dynamic load capacity of the composite material.

[0026] Preferably, in the heating step, the advancing direction of the titanium plate strip and the aluminum plate strip is the same, and the advancing direction of the atmosphere of the inert gas and hydrogen is opposite to the titanium plate.

[0027] Compared with the prior art, the advantages of the present application include: (1) The production method of the titanium-aluminum composite plate strip provided by the present application has a small content of titanium oxide at the titanium-aluminum composite interface, and the obtained titanium-aluminum semi-solid composite plate strip has high bonding strength and good flatness. (2) The production method of the titanium-aluminum composite plate strip provided by the present application has a continuous rolling process, which is suitable for continuous production and is conducive to improving production efficiency. (3) The production method of the titanium-aluminum composite plate strip provided by the present application has titanium and aluminum plate strips in the form of strips, which can increase the production width size and thus improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 The present application relates to a production method of a titanium-aluminum composite plate strip.

[0030] Reference signs: 1, aluminum plate strip; 2, titanium plate strip; 3, protective gas electric heating outer circulation system; 4, heating furnace; 5, rolling rod; 6, closed cover; 7, guide roller; 8, heating piece; 9, tension roller. DETAILED DESCRIPTION

[0031] In view of the deficiencies in the prior art, the present inventors have long-term research and a large amount of practice, and have proposed the technical solutions of the present application. The technical solutions, their implementation processes and principles will be further explained and described below in combination with the drawings in the embodiments of the present application and specific implementation cases.

[0032] Reference Figure 1 The production device involved in the production method of the titanium-aluminum composite plate strip in the present application is used for heating and rolling the aluminum plate strip 1 and the titanium plate strip 2, and includes two heating furnaces 4 and a closed cover 6. The end portions of the two heating furnaces 4 and the closed cover 6 jointly form a closed space. For any one heating furnace 4, the heating furnace 4 is provided with a heating piece 8 and a plurality of guide rollers 7, and the heating piece 8 is used for heating the heating furnace 4.

[0033] The aluminum plate strip 1 and the titanium plate strip 2 are guided into two heating furnaces 4 by guide rollers 7 respectively, and the mutually adhering surfaces of the aluminum plate strip 1 and the titanium plate strip 2 are mutually oriented. The two heating furnaces 4 heat the aluminum plate strip 1 and the titanium plate strip 2 respectively, and the aluminum plate strip 1 and the titanium plate strip 2 are supported and guided by the guide rollers 7 in the respective heating furnaces.

[0034] The tension roller 9 is applied with a tension force F in the opposite direction of the movement direction of the aluminum plate strip 1 in the corresponding heating furnace, so that the part of the aluminum plate strip 1 in the corresponding heating furnace 4 is subjected to the tension force, and the tension force F = tensile strength of the aluminum plate strip × (5%~7%) × cross-sectional area of the aluminum plate strip.

[0035] It can be understood that the heating furnace 4 is designed in layers, which can accurately control the temperature of the aluminum plate strip 1 and the titanium plate strip 2 respectively. The heating furnace 4 is a horizontal long furnace, which is conducive to ensuring that the aluminum plate strip 1 and the titanium plate strip 2 have sufficient heating time to heat to the predetermined temperature while continuously heating the aluminum plate strip 1 and the titanium plate strip 2, thereby improving the production efficiency.

[0036] The production device further comprises a rolling stick 5, and the rolling stick 5 is in the closed cover 6. After the aluminum plate strip 1 and the titanium plate strip 2 are heated, they are guided out of the corresponding heating furnace 4, the aluminum plate strip 1 is guided to the rolling stick 5 by the guide roller 7, and the titanium plate strip 2 is directly conveyed to the rolling stick 5. The aluminum plate strip 1 and the titanium plate strip 2 after heating are rolled to obtain a titanium-aluminum composite plate strip under the rolling force of the rolling stick 5.

[0037] The production device further comprises two protective gas electric heating outer circulation systems 3, and the two protective gas electric heating outer circulation systems 3 are used to provide protective gas for the two heating furnaces 4 respectively.

[0038] In the accompanying drawings, Figure 1 In the accompanying drawings, the aluminum plate strip 1 is above the titanium plate strip 2, the direction indicated by the black solid arrow is the direction of the plate strip, and the direction indicated by the white solid arrow is the movement direction of the protective gas.

[0039] Taking one of the two heating furnaces 4 as an example, the corresponding protective gas electric heating outer circulation system 3 blows protective gas from below the aluminum plate strip 1, and the temperature of the protective gas is the same as the temperature to which the aluminum plate strip 1 is to be heated. The movement direction of the protective gas in the heating furnace 4 is opposite to the movement direction of the aluminum plate strip 1, the protective gas enters from one end of the heating furnace 4 and is finally discharged from the other end of the heating furnace 4 and then flows back to the protective gas electric heating outer circulation system 3. After receiving the protective gas discharged from the heating furnace 4, the protective gas electric heating outer circulation system 3 removes impurities in the protective gas, supplements the composition of the protective gas, and heats the protective gas. The impurities are mainly water, so that the protective gas enters the heating furnace 4 again with the same composition ratio.

[0040] It can be understood that the corresponding protective gas electric heating outer circulation system 3 blows the protective gas from above the titanium plate strip 2 in the lower one of the two heating furnaces 4, and the temperature of the protective gas is the same as the temperature to which the titanium plate strip 2 is to be heated.

[0041] It can be understood that the protective gas is ventilated in the reverse rolling direction in the present application, which is beneficial to maintaining the temperature stability in the heating furnace.

[0042] Preparation Example Preparation Example 1 The material used in the present preparation example is an aluminum plate strip raw material, the thickness of the aluminum plate strip raw material is 6.5 mm, and the width is 1 m. The main components and partial properties of the aluminum plate strip raw material are as follows: Table 1 Main components and contents of the aluminum plate strip raw material Element Mass content / % Si 0.8313 Fe 0.1561 Cu 0.6269 Mn 0.3021 Mg 0.9238 Cr 0.007 Zn 0.0059 Ti 0.346 Al 97.0613 Table 2 Partial property data of the aluminum plate strip raw material Performance Value Surface hardness / HV 59.35 Tensile strength / MPa 190 Yield strength / MPa 136 Elongation / % 20 The preparation process of the present preparation example includes the following steps: Z1, cleaning the aluminum plate strip raw material to remove oil stains and oxides on the surface of the aluminum plate strip raw material, then annealing treatment at 220℃ for 3h, and then cooling to room temperature to obtain a pretreated aluminum plate strip raw material; Z2, cold rolling the pretreated aluminum plate strip raw material, the thickness change in the rolling process is 1mm, 0.8mm, 0.6mm, 0.5mm, 0.4mm, 0.3mm, 0.2mm, respectively, the pretreated aluminum plate strip raw material is thinned to 2.7mm, and an aluminum plate strip 1 is obtained.

[0043] Preparation Example 2 The difference between the present preparation example and Preparation Example 1 is that in step Z2, the pretreated aluminum plate strip raw material is cold rolled, and the thickness reduction value in the rolling process is 2mm, 1.3mm, 0.95mm, respectively, the pretreated aluminum plate strip raw material is thinned to 2.25mm, and an aluminum plate strip 1 is obtained.

[0044] Preparation Example 3 The difference between the present preparation example and Preparation Example 1 is that in step Z2, the pretreated aluminum plate strip raw material is cold rolled, and the thickness reduction value in the rolling process is 1.8mm, 1.2mm, 1mm, respectively, the pretreated aluminum plate strip raw material is thinned to 2.5mm, and an aluminum plate strip 1 is obtained.

[0045] Preparation Example 4 The difference between the present preparation example and Preparation Example 1 is that in step Z2, the pretreated aluminum plate strip raw material is cold rolled, and the thickness reduction value in the rolling process is 2mm, 2mm, 0.5mm, 0.4mm, respectively, the pretreated aluminum plate strip raw material is thinned to 1.6mm, and an aluminum plate strip 1 is obtained.

[0046] Preparation Example 5 The material used in this preparation example is a titanium plate strip raw material with a thickness of 1.6 mm and a width of 0.5 m. The main components and some properties of the titanium plate strip raw material are as follows: Table 3 Main components and contents of the titanium plate strip raw material Element Mass content / % Al 5.96 V 3.82 Fe 0.027 C 0.0081 O 0.041 N 0.003 H 0.0014 TI 90.14 Table 4 Some property data of the titanium plate strip raw material Performance Value Surface hardness / HV 330.45 Tensile strength / MPa 921.22 Yield strength / MPa 805.98 Elongation / % 13.75 The preparation process of this preparation example includes the following steps: The titanium plate strip raw material is cleaned to remove oil stains and oxides on the surface of the titanium plate strip raw material, then annealed at 550°C for 3 h, and then cooled to room temperature at room temperature to obtain a titanium plate strip 2.

[0047] Preparation Example 6 The difference between this preparation example and Preparation Example 5 is that the preparation process of this preparation example includes the following steps: Z1, the titanium plate strip raw material is cleaned to remove oil stains and oxides on the surface of the titanium plate strip raw material, then annealed at 450°C for 3 h, and then cooled to room temperature at room temperature to obtain a pretreated titanium plate strip raw material; Z2, the pretreated titanium plate strip raw material is treated at 800°C for 20 min, and then oil-quenched; Z3, after oil-quenching, treated at 450°C for 40 min; Z4, finally treated in nitrogen at -25°C for 5 min to obtain a titanium plate strip 2.

[0048] Preparation Example 7 The difference between this preparation example and Preparation Example 5 is that the material used in this preparation example is a titanium plate strip raw material with a thickness of 2.0 mm and a width of 1 m. Some properties of the titanium plate strip raw material are as follows: Table 5 Some property data of the titanium plate strip raw material Performance Value Surface hardness / HV 349.80 Tensile strength / MPa 1025 Yield strength / MPa 939 Elongation / % 10.8 The preparation process of this preparation example includes the following steps: Z1, the titanium plate strip raw material is cleaned to remove oil stains and oxides on the surface of the titanium plate strip raw material, then annealed at 450°C for 3 h, and then cooled to room temperature at room temperature to obtain a pretreated titanium plate strip raw material; Z2, the pretreated titanium plate strip raw material is treated at 825°C for 22 min, and then oil-quenched; Z3, after oil-quenching, treated at 500°C for 50 min; Z4, finally treated in nitrogen at -22.5°C for 5.5 min to obtain a titanium plate strip 2.

[0049] Preparation Example 8 The difference between the present preparation example and Preparation Example 5 is that the material used in the present preparation example is a titanium plate strip raw material with a thickness of 2.5 mm and a width of 1.4 m. The partial performance of the titanium plate strip raw material is as follows: Table 6 Partial performance data of the titanium plate strip raw material Performance Value Surface hardness / HV 339.78 Tensile strength / MPa 1063.37 Yield strength / MPa 988.02 Elongation / % 8 The preparation process of the present preparation example includes the following steps: Z1, cleaning the titanium plate strip raw material to remove oil stains and oxides on the surface of the titanium plate strip raw material, then annealing treatment at 450℃ for 3h, and then cooling to room temperature at room temperature to obtain a pretreated titanium plate strip raw material; Z2, treating the pretreated titanium plate strip raw material at 850℃ for 25 min, and then oil quenching; Z3, oil quenching at 550℃ for 60 min; Z4, finally treating at -20℃ in nitrogen for 6 min to obtain a titanium plate strip 2.

[0050] Example Example 1 The aluminum plate strip 1 used in the present example is derived from Preparation Example 1 and is cut to a width of 0.5 m, and the titanium plate strip 2 is derived from Preparation Example 2. The composition of the protective gas is nitrogen and hydrogen, and the volume ratio of nitrogen to hydrogen is 12:1.

[0051] The implementation process of the present example includes the following steps: S1.1, laser texturing one surface of the titanium plate strip 2, the texture of the laser texturing being perpendicular to the rolling direction, and the roughness of the texturing being 9 μm, and then wet sanding along the direction perpendicular to the rolling direction by a sand belt to obtain a titanium sanded surface with a roughness of 3 μm; S1.2, liquid metal transition layer preparation: coating a Ga-In-Sn alloy layer on the sanded surface of the titanium plate strip, the component ratio being Ga 61wt%, In 22wt%, and Sn 12wt%, the coating thickness being 0.5 μm, and the coverage being 95%; S1.3, wet sanding one surface of the aluminum plate strip 1 by a sand belt to a roughness of 4.5 μm to obtain an aluminum sanded surface; S1.4, referring to Figure 1 , starting two protective gas electric heating outer circulation systems 3, and the two protective gas electric heating outer circulation systems 3 blowing protective gas into the corresponding heating furnaces 4, so that the flow rate of the protective gas in the two heating furnaces 4 is 0.1 m 3 / min; controlling the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 450℃, and the temperature of the protective gas entering the lower heating furnace 4 is 450℃; starting the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 450℃, and the temperature of the lower heating furnace 4 is 450℃; S2, introduce the aluminum plate strip 1 into the upper heating furnace 4, introduce the titanium plate strip 2 into the lower heating furnace 4, respectively adjust the upper heating furnace 4 and the lower heating furnace 4, so that the aluminum plate strip 1 is heated to 450℃, and the titanium plate strip 2 is heated to 450℃; S3, introduce the heated aluminum plate strip 1 and titanium plate strip 2 to the rolling roll 5 for rolling, the rolling zone length is 30mm, the rolling force is 1530900N, and in the rolling process, the titanium plate strip is subjected to ultrasonic vibration along the rolling direction at the same time, the vibration frequency is 20kHz, the amplitude is 5μm, and the vibration energy density is 0.8J / cm 2 ; the rolled plate strip is subjected to annealing treatment, the annealing temperature is 450℃, and the annealing time is 5h; S4, control the temperature drop speed of the annealed plate strip to be 30℃ / h to drop to room temperature, and the titanium-aluminum semi-solid composite plate strip is obtained.

[0052] Example 2 The aluminum plate strip 1 used in this example is derived from Preparation Example 1 and is cut to a width of 0.5m, the titanium plate strip 2 is derived from Preparation Example 2, and the composition of the protective gas is nitrogen and hydrogen, wherein the volume ratio of nitrogen to hydrogen is 12:1.

[0053] The implementation process of this example includes the following steps: S1.1, laser texturing is performed on one surface of the titanium plate strip 2, the texture of the laser texturing is perpendicular to the rolling direction, the roughness of the laser texturing is 9μm, then wet sanding is performed on the titanium plate strip along the direction perpendicular to the rolling direction, the sanding roughness is 3μm, and a titanium sanded surface is obtained; S1.2, liquid metal transition layer preparation: a Ga-In-Sn alloy layer is coated on the sanded surface of the titanium plate strip, the component ratio is Ga 65wt%, In 26wt%, and Sn 15wt%, the coating thickness is 1μm, and the coverage rate is 96%; S1.3, one surface of the aluminum plate strip 1 is wet sanded by a sand belt to a roughness of 4.5μm, and an aluminum sanded surface is obtained; S1.4, refer to Figure 1 , start two protective gas electric heating outer circulation systems 3, the two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow rate of the protective gas in the two heating furnaces 4 is 0.1m 3 / min; control the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 450℃, and the temperature of the protective gas entering the lower heating furnace 4 is 450℃; start the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 450℃, and the temperature of the lower heating furnace 4 is 450℃; S2, introduce the aluminum plate strip 1 into the upper heating furnace 4 with the aluminum polishing surface facing down; introduce the titanium plate strip 2 into the lower heating furnace 4 with the titanium polishing surface facing up; adjust the upper heating furnace 4 and the lower heating furnace 4 respectively so that the aluminum plate strip 1 is heated to 450℃ and the titanium plate strip 2 is heated to 450℃; S3, introduce the heated aluminum plate strip 1 and the titanium plate strip 2 to the rolling roll 5 for rolling, the rolling zone length is 30mm, the rolling force is 1530900N, and in the rolling process, the titanium plate strip is simultaneously subjected to ultrasonic vibration along the rolling direction, the vibration frequency is 40kHz, the amplitude is 15μm, and the vibration energy density is 1.5 J / cm 2 ·s; anneal the rolled plate strip, the annealing temperature is 450℃, and the annealing time is 5h; S4, control the temperature drop speed of the annealed plate strip to be 30℃ / h to drop to room temperature, and the titanium-aluminum semi-solid composite plate strip is obtained.

[0054] Example 3 The difference between this example and Example 2 is that in step S1.1, the roughness of the laser texturing is 14μm, and the roughness of the sand belt polishing is 4.5μm; in step S1.2, the roughness of the aluminum polishing surface is 8μm.

[0055] Example 4 The difference between this example and Example 2 is that in step S1.1, the roughness of the laser texturing is 18μm, and the roughness of the sand belt polishing is 5.4μm; in step S1.2, the roughness of the aluminum polishing surface is 10.8μm.

[0056] Example 5 The aluminum plate strip 1 used in this example is derived from Preparation Example 1 and is cut to a width of 0.8m, the titanium plate strip 2 is derived from Preparation Example 3, and the composition of the protective gas is argon and hydrogen, wherein the volume ratio of argon to hydrogen is 20:1.

[0057] The implementation process of this example includes the following steps: S1.1, one surface of the titanium plate strip 2 is subjected to laser texturing, the texture of the laser texturing is perpendicular to the rolling direction, the roughness of the texturing is 9μm, and then the surface is subjected to wet sanding along the direction perpendicular to the rolling direction by a sand belt, the roughness of the sand belt polishing is 3μm, and a titanium polishing surface is obtained; S1.2, liquid metal transition layer preparation: a Ga-In-Sn alloy layer is coated on the titanium plate strip polishing surface, the component ratio is Ga 62wt%, In 23wt%, and Sn 13wt%, the coating thickness is 0.6μm, and the coverage rate is 97%; S1.3, one surface of the aluminum plate strip 1 is subjected to wet sanding by a sand belt to a roughness of 4.5μm, and an aluminum polishing surface is obtained; S1.4, refer to Figure 1, start two protective gas electric heating outer circulation systems 3, two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnace 4, so that the flow of protective gas in the two heating furnaces 4 is 0.15m 3 / min; control the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 450℃, and the temperature of the protective gas entering the lower heating furnace 4 is 450℃; start the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 450℃, and the temperature of the lower heating furnace 4 is 450℃; S2, introduce the aluminum plate strip 1 into the upper heating furnace 4, and the aluminum polishing surface faces downward; introduce the titanium plate strip 2 into the lower heating furnace 4, and the titanium polishing surface faces upward; adjust the upper heating furnace 4 and the lower heating furnace 4 respectively, so that the aluminum plate strip 1 is heated to 450℃, and the titanium plate strip 2 is heated to 450℃. S3, introduce the heated aluminum plate strip 1 and titanium plate strip 2 to the rolling roll 5 for rolling, the rolling zone length is 40mm, the rolling force is 7117440N, and in the rolling process, the titanium plate strip is subjected to ultrasonic vibration along the rolling direction at the same time, the vibration frequency is 21kHz, the amplitude is 6μm, and the vibration energy density is 0.9J / cm 2 ·s; the rolled plate strip is subjected to annealing treatment, the annealing temperature is 500℃, and the annealing time is 3h; S4, control the temperature drop speed of the annealed plate strip to be 35℃ / h to room temperature, that is, the titanium-aluminum semi-solid composite plate strip is obtained.

[0058] Example 6 The difference between this embodiment and example 5 is that: S1.3, refer to Figure 1 , start two protective gas electric heating outer circulation systems 3, two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnace 4, so that the flow of protective gas in the two heating furnaces 4 is 0.15m 3 / min; control the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 390℃, and the temperature of the protective gas entering the lower heating furnace 4 is 500℃; start the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 390℃, and the temperature of the lower heating furnace 4 is 500℃; S2, introduce the aluminum plate strip 1 into the upper heating furnace 4, and the aluminum polishing surface faces downward; introduce the titanium plate strip 2 into the lower heating furnace 4, and the titanium polishing surface faces upward; adjust the upper heating furnace 4 and the lower heating furnace 4 respectively, so that the aluminum plate strip 1 is heated to 390℃, and the titanium plate strip 2 is heated to 500℃.

[0059] Example 7 The difference between this embodiment and example 5 is that: S1.3, refer toFigure 1 S1.1, start two protective gas electric heating outer circulation systems 3, the two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow of protective gas in the two heating furnaces 4 is 0.15 m 3 / min; control the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 320℃, and the temperature of the protective gas entering the lower heating furnace 4 is 550℃; start the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 320℃, and the temperature of the lower heating furnace 4 is 550℃; S2, introduce the aluminum plate strip 1 into the upper heating furnace 4, and the aluminum polishing surface faces downward; introduce the titanium plate strip 2 into the lower heating furnace 4, and the titanium polishing surface faces upward; adjust the upper heating furnace 4 and the lower heating furnace 4 respectively, so that the aluminum plate strip 1 is heated to 320℃, and the titanium plate strip 2 is heated to 550℃.

[0060] Example 8 The aluminum plate strip 1 used in this example is derived from Preparation Example 1, the titanium plate strip 2 is derived from Preparation Example 3, and the composition of the protective gas is nitrogen and hydrogen, wherein the volume ratio of nitrogen to hydrogen is 30:1.

[0061] The implementation process of this example includes the following steps: S1.1, laser texturing one surface of the titanium plate strip 2, the laser texturing pattern is perpendicular to the rolling direction, and the texturing roughness is 9μm, then wet sanding is performed along the direction perpendicular to the rolling direction by a sand belt, and the sand belt polishing roughness is 3μm, to obtain a titanium polishing surface; S1.2, liquid metal transition layer preparation: coating a Ga-In-Sn alloy layer on the titanium plate strip polishing surface, the component ratio is Ga63wt%, In 24wt%, Sn 14wt%, the coating thickness is 0.7μm, and the coverage is 97%; S1.3, wet sanding one surface of the aluminum plate strip 1 by a sand belt to a roughness of 4.5μm to obtain an aluminum polishing surface; S1.4, referring to Figure 1 S1.1, start two protective gas electric heating outer circulation systems 3, the two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow of protective gas in the two heating furnaces 4 is 0.15 m 3 / min; control the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 320℃, and the temperature of the protective gas entering the lower heating furnace 4 is 550℃; start the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 320℃, and the temperature of the lower heating furnace 4 is 550℃; S2, introduce the aluminum plate strip 1 into the upper heating furnace 4 with the aluminum polishing surface facing down, introduce the titanium plate strip 2 into the lower heating furnace 4 with the titanium polishing surface facing up, respectively adjust the upper heating furnace 4 and the lower heating furnace 4 so that the aluminum plate strip 1 is heated to 450℃ and the titanium plate strip 2 is heated to 450℃; S3, introduce the heated aluminum plate strip 1 and the titanium plate strip 2 to the rolling roll 5 for rolling, the rolling zone length is 60mm, the rolling force is 7117440N, and in the rolling process, the titanium plate strip is simultaneously subjected to ultrasonic vibration along the rolling direction, the vibration frequency is 22kHz, the vibration amplitude is 7μm, and the vibration energy density is 1.0J / cm 2 ·s; anneal the rolled plate strip, the annealing temperature is 550℃, and the annealing time is 1h; S4, control the temperature drop speed of the annealed plate strip to be 40℃ / h to drop to room temperature, thereby obtaining the titanium-aluminum semi-solid composite plate strip.

[0062] Example 9 The difference between this example and Example 8 is that the rolling force in step S3 is 18334800N.

[0063] Example 10 The difference between this example and Example 8 is that the rolling force in step S3 is 19446000N.

[0064] Example 11 The aluminum plate strip 1 used in this example is derived from Preparation Example 1 and is cut to a width of 0.5m, the titanium plate strip 2 is derived from Preparation Example 4, and the composition of the protective gas is nitrogen and hydrogen, wherein the hydrogen accounts for 20% of the total volume of the protective gas.

[0065] The implementation process of this example includes the following steps: S1, one surface of the titanium plate strip 2 is subjected to laser texturing, the texture of the laser texturing is perpendicular to the rolling direction, and the texturing roughness is 15μm; S1.2, liquid metal transition layer preparation: coat a Ga-In-Sn alloy layer on the polishing surface of the titanium plate strip, the component ratio is Ga64wt%, In 25wt%, and Sn 15wt%, the coating thickness is 0.8μm, and the coverage rate is 98%; S2.1, refer to Figure 1 , start two protective gas electric heating outer circulation systems 3, the two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow rate of the protective gas in the two heating furnaces 4 is 0.3m 3 / min; the protective gas electric heating outer circulation system 3 was controlled to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 was 500℃, and the temperature of the protective gas entering the lower heating furnace 4 was 550℃; two heating furnaces 4 were started to preheat, so that the temperature of the upper heating furnace 4 was 500℃, and the temperature of the lower heating furnace 4 was 5500℃; S2.2, the aluminum plate strip 1 was introduced into the upper heating furnace 4, and the titanium plate strip 2 was introduced into the lower heating furnace 4, and the polished surface of the titanium plate strip 2 faced upward; the upper heating furnace 4 and the lower heating furnace 4 were adjusted respectively, so that the aluminum plate strip 1 was heated to 500℃, and the titanium plate strip 2 was heated to 550℃; S3, the heated aluminum plate strip 1 and the titanium plate strip 2 were introduced to the rolling roll 5 for rolling, the length of the rolling area was 80mm, the rolling force was 7898604N, the tension of the tension roller 9 was 5519.5N, and the titanium plate strip was vibrated in the rolling direction with an ultrasonic vibration frequency of 23kHz, an amplitude of 8μm, and a vibration energy density of 1.1J / cm 2 ·s, and a semi-finished strip was obtained after rolling; S4, the semi-finished strip was annealed at an annealing temperature of 550℃ for 7h; and the semi-finished strip after annealing was cooled to room temperature at 15℃, to obtain a titanium-aluminum composite alloy.

[0066] Example 12 The difference between this example and Example 11 is that the tension in step S3 is 3942.5N.

[0067] Example 13 The difference between this example and Example 11 is that the titanium plate strip 2 is derived from Preparation Example 5.

[0068] Example 14 The difference between this example and Example 13 is that the roughness of the laser texturing in step S1 is 20μm.

[0069] Example 15 The difference between this example and Example 13 is that the roughness of the laser texturing in step S1 is 25μm.

[0070] Example 16 The aluminum plate strip 1 used in this example is derived from Preparation Example 2 and is cut to a width of 1m, the titanium plate strip 2 is derived from Preparation Example 6, and the composition of the protective gas is nitrogen and hydrogen, wherein the hydrogen accounts for 20% of the total volume of the protective gas.

[0071] The implementation process of this example includes the following steps: S1, one surface of the titanium plate strip 2 was laser textured, the texture of the laser texturing was perpendicular to the rolling direction, and the roughness of the laser texturing was 15μm; S1.2, Liquid metal transition layer preparation: A Ga-In-Sn alloy layer is coated on the polished surface of the titanium plate strip, with a composition ratio of Ga 63wt%, In 24wt%, and Sn 13wt%, a coating thickness of 0.9μm, and a coverage rate of 99%; S2.1, Refer to Figure 1 , start two protective gas electric heating outer circulation systems 3, and the two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow rate of the protective gas in the two heating furnaces 4 is 0.3m 3 / min; control the protective gas electric heating outer circulation system 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 420℃, and the temperature of the protective gas entering the lower heating furnace 4 is 600℃; start the two heating furnaces 4 for preheating, so that the temperature of the upper heating furnace 4 is 420℃, and the temperature of the lower heating furnace 4 is 600℃; S2.2, introduce the aluminum plate strip 1 into the upper heating furnace 4, and introduce the titanium plate strip 2 into the lower heating furnace 4, with the polished surface of the titanium plate strip 2 facing upward; adjust the upper heating furnace 4 and the lower heating furnace 4 respectively, so that the aluminum plate strip 1 is heated to 420℃, and the titanium plate strip 2 is heated to 600℃; S3, introduce the heated aluminum plate strip 1 and titanium plate strip 2 to the rolling roll 5 for rolling, with a rolling zone length of 65mm, a rolling force of 15000000N, and a tension roll 9 tension = 9462N; in the rolling process, ultrasonic vibration is applied to the titanium plate strip along the rolling direction, with a vibration frequency of 24kHz, an amplitude of 9μm, and a vibration energy density of 1.2J / cm 2 ·s; and a semi-finished strip is obtained after rolling; S4, anneal the semi-finished strip at an annealing temperature of 600℃ for 4h; and cool the annealed semi-finished strip to room temperature at 20℃, to obtain a titanium-aluminum composite alloy.

[0072] Example 17 The difference between this example and Example 6 is that the hydrogen accounts for 18% of the total volume of the protective gas.

[0073] Example 18 The difference between this example and Example 6 is that the hydrogen accounts for 15% of the total volume of the protective gas.

[0074] Example 19 The aluminum plate strip 1 used in this example is derived from Preparation Example 3 and is cut to a width of 1.4m, the titanium plate strip 2 is derived from Preparation Example 7, and the composition of the protective gas is nitrogen and hydrogen, wherein the hydrogen accounts for 20% of the total volume of the protective gas.

[0075] The implementation process of this example includes the following steps: S1, one surface of the titanium plate strip 2 is laser textured, the laser textured lines are perpendicular to the rolling direction, and the roughness of the laser texturing is 15 μm; S1.2, liquid metal transition layer preparation: a Ga-In-Sn alloy layer is coated on the polished surface of the titanium plate strip, the component ratio is Ga 63 wt%, In 25 wt%, and Sn 13 wt%, the coating thickness is 0.7 μm, and the coverage is 96%; S2.1, referring to Figure 1 , two protective gas electric heating outer circulation systems 3 are started, the two protective gas electric heating outer circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow of the protective gas in the two heating furnaces 4 is 0.3 m 3 / min; the protective gas electric heating outer circulation system 3 heats the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 350℃, and the temperature of the protective gas entering the lower heating furnace 4 is 650℃; two heating furnaces 4 are started to preheat, so that the temperature of the upper heating furnace 4 is 350℃, and the temperature of the lower heating furnace 4 is 650℃; S2.2, the aluminum plate strip 1 is introduced into the upper heating furnace 4, and the titanium plate strip 2 is introduced into the lower heating furnace 4, and the polished surface of the titanium plate strip 2 faces upward; the upper heating furnace 4 and the lower heating furnace 4 are adjusted respectively, so that the aluminum plate strip 1 is heated to 350℃, and the titanium plate strip 2 is heated to 650℃; S3, the heated aluminum plate strip 1 and the titanium plate strip 2 are introduced to the rolling roll 5 for rolling, the rolling zone length is 50 mm, the rolling force is 17000000 N, the tension roll 9 tension = 15960 N, and the titanium plate strip is vibrated along the rolling direction in the rolling process, the vibration frequency is 25 kHz, the amplitude is 10 μm, and the vibration energy density is 1.3 J / cm 2 ·s, and the semi-finished strip is obtained after rolling; S4, the semi-finished strip is annealed at 650℃ for 2h; and the semi-finished strip after annealing is cooled to room temperature at 25℃, and the titanium-aluminum composite alloy is obtained.

[0076] Example 20 The difference between this embodiment and example 9 is that in S2.1, the temperature of the protective gas entering the upper heating furnace 4 is 490℃, and the preheating temperature of the upper heating furnace 4 is 420℃; in step S2.2, the aluminum plate strip 1 is heated to 420℃.

[0077] Example 21 The difference between this embodiment and example 9 is that in S2.1, the temperature of the protective gas entering the upper heating furnace 4 is 520℃, and the preheating temperature of the upper heating furnace 4 is 500℃; in step S2.2, the aluminum plate strip 1 is heated to 500℃.

[0078] Comparative examples 1-10 and examples 1-20 are compared Comparative Example 1 The difference between this comparative example and Example 1 is that the composition of the protective gas in this comparative example is nitrogen, which does not contain hydrogen.

[0079] Comparative Example 2 The difference between this comparative example and Example 1 is that the volume ratio of nitrogen and hydrogen in the protective gas in this comparative example is 3:1.

[0080] Comparative Example 3 The difference between this comparative example and Example 2 is that the roughness of the roughening in step S1.1 is 5 μm.

[0081] Comparative Example 4 The difference between this comparative example and Example 2 is that the roughness of the roughening in step S1.1 is 25 μm.

[0082] Comparative Example 5 The difference between this comparative example and Example 2 is that: S1.3, refer to Figure 1 , start two protective gas electric heating external circulation systems 3, the two protective gas electric heating external circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow rate of the protective gas in the two heating furnaces 4 is 0.1 m3 / min; control the protective gas electric heating external circulation systems 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 450°C, and the temperature of the protective gas entering the lower heating furnace 4 is 400°C; start the two heating furnaces 4 to preheat, so that the temperature of the upper heating furnace 4 is 450°C, and the temperature of the lower heating furnace 4 is 400°C; 3 S2, introduce the aluminum plate strip 1 into the upper heating furnace 4, with the aluminum polished surface facing downward; introduce the titanium plate strip 2 into the lower heating furnace 4, with the titanium polished surface facing upward; adjust the upper heating furnace 4 and the lower heating furnace 4 respectively, so that the aluminum plate strip 1 is heated to 450°C, and the titanium plate strip 2 is heated to 400°C.

[0083] Comparative Example 6 The difference between this comparative example and Example 2 is that: S1.3, refer to Figure 1 , start two protective gas electric heating external circulation systems 3, the two protective gas electric heating external circulation systems 3 blow protective gas into the corresponding heating furnaces 4, so that the flow rate of the protective gas in the two heating furnaces 4 is 0.1 m3 / min; control the protective gas electric heating external circulation systems 3 to heat the protective gas, so that the temperature of the protective gas entering the upper heating furnace 4 is 310°C, and the temperature of the protective gas entering the lower heating furnace 4 is 450°C; start the two heating furnaces 4 to preheat, so that the temperature of the upper heating furnace 4 is 310°C, and the temperature of the lower heating furnace 4 is 450°C; ​S2, introduce the aluminum plate strip 1 into the upper heating furnace 4 with the aluminum polishing surface facing downward, introduce the titanium plate strip 2 into the lower heating furnace 4 with the titanium polishing surface facing upward, and adjust the upper heating furnace 4 and the lower heating furnace 4 respectively so that the aluminum plate strip 1 is heated to 310℃ and the titanium plate strip 2 is heated to 450℃.

[0084] Comparative Example 7 The difference between this example and Example 2 is that the rolling force in step S3 is 1400000N.

[0085] Example 8 The difference between this comparative example and Example 8 is that the rolling force in step S3 is 1800000N.

[0086] Comparative Example 9 The difference between this comparative example and Example 8 is that the step of preparing the liquid metal transition layer is omitted.

[0087] Comparative Example 10 The difference between this comparative example and Example 8 is that no ultrasonic vibration is applied to the titanium plate strip during rolling.

[0088] Performance testing The titanium-aluminum semi-solid composite plate strips obtained in Examples 1-20 and Comparative Examples 1-10 are tested in the following manner: (1) The peeling strength, which is the interfacial bonding force in this example, is tested by the peeling method in GJB446-1988. (2) The composite plate is subjected to thickness change rate and internal bending tests.

[0089] Test results Table 1 (Examples 1-10) Performance index Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Interface strength (MPa) 215 185 220 230 190 200 210 215 206 217 Brittle layer thickness (μm) 0.2 0.5 0.3 0.5 0.6 0.2 0.5 0.7 0.5 0.4 Production efficiency (m / min) 15 15 12 16 15 14 13 12 15 17 Table 2 (Examples 11-20) Performance index Example 11 Example 12 Example 13 Example 14 Example 15 Example 16 Example 17 Example 18 Example 19 Example 20 Interface strength (MPa) 156 167 180 190 184 173 183 176 186 163 Brittle layer thickness (μm) 1.6 1.8 2.5 3.2 2.8 2.6 2.7 2.8 3.4 3.1 Production efficiency (m / min) 15 16 17 13 15 16 17 16 15 14 Table 3 (Comparative Examples 1-10) Performance index Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 Comparative example 7 Comparative example 8 Comparative example 9 Comparative example 10 Interface strength (MPa) 120 123 126 135 134 128 120 140 102 90 Brittle layer thickness (μm) 3.5 4.5 5.0 5.1 4.9 4.6 5.2 4.5 8.2 7.5 Production efficiency (m / min) 15 13 12 14 15 16 17 16 8 6 As can be seen from the above tables, the interfacial strength (MPa), brittle layer thickness (μm), and production efficiency (m / min) in Examples 1-20 are all significantly greater than those in Comparative Examples 1-10, and when the step of preparing the liquid metal transition layer is omitted or no ultrasonic vibration is applied to the titanium plate strip during rolling, the interfacial strength (MPa) is significantly reduced and the brittle layer thickness (μm) is significantly increased, thus it can be concluded that the above steps are essential technical features.

[0090] The titanium-aluminum semi-solid composite plate strips obtained in Examples 1-20 were all broken in the peeling strength test, but the titanium-aluminum interface was not delaminated, indicating that the bonding strength exceeded the strength of the aluminum substrate. In contrast, delamination was occasionally observed in Comparative Examples 1-10.

[0091] It should be understood that the above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For ordinary skilled in the art to which the present application belongs, without departing from the concept of the present application, some simple deductions or substitutions can be made, and any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A production method of a titanium-aluminum composite plate strip, comprising a titanium plate strip and an aluminum plate strip, the purity of the titanium plate strip and the aluminum plate strip is ≥ 99.4%, characterized in that, The method comprises the following steps: Pre-treatment: the titanium plate strip is treated at 800-850℃ for 20-25min, then oil quenching, the titanium plate strip after oil quenching is treated at 450-550℃ for 40-60min, and finally treated in oxygen-free gas at -25℃ to -20℃ for 5-6min; Polishing: the surface of the titanium plate strip used for bonding with the aluminum plate strip is polished to form a titanium polishing surface with roughness of 9-18μm, and the surface of the aluminum plate strip used for bonding with the titanium plate strip is polished to form an aluminum polishing surface, the roughness of the aluminum polishing surface = the roughness of the titanium polishing surface along the rolling direction - (4-8)μm; Liquid metal transition layer preparation: a Ga-In-Sn alloy layer is coated on the titanium plate strip polishing surface, the component ratio is Ga 61-65wt%, In 22-26wt%, Sn 12-15wt%, the coating thickness is 0.5-1μm, and the coverage is ≥95%; Pre-rolling treatment: the aluminum plate strip is subjected to plastic deformation of 3-5% along the rolling direction at room temperature, and the pre-stretching force = the yield strength of the aluminum plate strip × (1.05-1.2) × the cross-sectional area; Heating: the titanium plate strip is heated to 450-550℃ under the protection of inert gas and hydrogen, and the aluminum plate strip is heated to 320-450℃; Rolling: the polished surface of the heated titanium plate strip and the heated aluminum plate strip are attached and rolled, the rolling force ≤ titanium raw material normal temperature yield strength x (0.63-0.7) x width x length of rolling area, in the rolling process, the aluminum plate strip is subjected to a pulling force in the opposite direction of the rolling direction, the pulling force = aluminum plate strip tensile strength x (5%-7%) x cross-sectional area of the aluminum plate strip, and a semi-finished strip is obtained after rolling; in the rolling process, ultrasonic vibration along the rolling direction is applied to the titanium plate strip, the vibration frequency is 20-40 kHz, the amplitude is 5-15 μm, and the vibration energy density is 0.8-1.5 J / cm 2 ·s; Post-treatment: the rolled plate strip is annealed at 450-550℃ for 1-5h; Cooling: the annealed plate strip is cooled to room temperature at a temperature drop speed of 30-40℃ / h, and a titanium-aluminum semi-solid composite plate strip is obtained.

2. The method of claim 1, wherein: The volume ratio of the hydrogen to the inert gas is 1:(12-30).

3. The method of claim 1, wherein the titanium-aluminum composite plate strip is produced by the steps of: The width of the titanium plate strip is 0.5-1.4m, and the thickness of the titanium plate strip is 1.6-2.5mm. ​ 4. The method of claim 3, wherein: The thickness ratio of the titanium plate strip to the aluminum plate strip is 1:(1.25-1.875).

5. The method of claim 1, wherein: The length of the rolling area is 30-60mm.

6. The method of claim 1, wherein: The roughness of the titanium polishing surface perpendicular to the rolling direction is ≤1 / 3 of the roughness of the titanium polishing surface along the rolling direction, and the roughness of the aluminum polishing surface = the roughness of the titanium polishing surface perpendicular to the rolling direction × (1.5-2).

7. The method of claim 6, wherein the titanium-aluminum composite strip is produced by the steps of: When polishing the titanium plate strip, the titanium surface is first laser textured, and the texture is perpendicular to the rolling direction, and then wet polishing is performed along the direction perpendicular to the rolling direction by using a sand belt. ​ 8. The method of claim 1, wherein: In the heating step, the titanium plate strip and the aluminum plate strip move in the same direction, and the atmosphere of the inert gas and hydrogen moves in the opposite direction of the titanium plate.

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