Method for producing ti / al laminated sheet by canning pack rolling and ti / al laminated sheet

Abstract

The application provides a method for preparing a Ti / Al layered plate through a canning and stacking rolling and the Ti / Al layered plate, and belongs to the technical field of metal material processing. The method comprises the following steps: cutting Ti foils and Al foils into blanks, and pretreating the surface of the blanks; treating the surface of a can, alternately stacking the treated multiple Ti foils and the multiple Al foils in the treated can, and welding the can; diffusing the welded can; rolling the diffused can at room temperature; removing the can, and taking out the Ti / Al layered plate. The layered plate with good combination of the Ti foils and the Al foils can be prepared through the canning and cold rolling, the surface of the plate is smooth after the can is removed, the plate shape is good, the Ti foils and the Al foils still keep good coordinated deformation when the rolling deformation reaches 90%, the interface is smooth, and no obvious defects are found.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal material processing, and particularly relates to a method for preparing a Ti / Al laminated plate through pack rolling and the Ti / Al laminated plate. BACKGROUND

[0002] Laminated composite materials originate from nature and imitate the structure of shell pearl layers, and have the characteristics of plasticity and strength. The laminated composite materials inherit the characteristics of shell layer-by-layer failure, reduce the sensitivity of the material to original crack defects, and improve the fracture toughness of the material without sacrificing the strength. The small interlayer spacing and the multi-interface effect make the material better than the corresponding single material in performance. The small interlayer spacing plays a role in refining the grain, and the small size of the particles limits the defect size, thereby enhancing the performance of the material in all aspects.

[0003] The Ti / Al laminated composite plate has the characteristics of Ti and Al, has the characteristics of light weight, high temperature resistance, high thermal conductivity, high wear resistance, high corrosion resistance, and high strength, and has broad application prospects in the fields of aerospace, petrochemical industry, and automobile industry. The excellent performance of the laminated composite material is mostly from the coordinated deformation at the interface, and maintaining the coordinated deformation of the metal layer is the key to preparing high-performance Ti / Al composite plates.

[0004] Currently, the preparation of Ti / Al laminated plates mainly requires a pack treatment. The pack is used to coordinate plastic deformation, prevent interlayer cracking, reduce internal cracks in the material, prevent misplacement of the plate during rolling and excessive deformation, fix the two plates, greatly reduce heat loss, hinder crack propagation, and effectively prevent oxidation of the alloy. Ti and Al have a large difference in strength and plasticity, and the two materials are stacked together and rolled, which easily causes uncoordinated deformation, and the Ti layer is prone to shrinkage and fracture, thereby destroying the layer continuity.

[0005] The currently reported patents for preparing Ti / Al laminated plates mainly use a pack hot rolling process. However, it is difficult to control the size accuracy of the thin plate prepared by the pack hot rolling process. In the hot rolling process, TiAl3 phase is easily generated at the Ti / Al interface. The continuous thickening and coarsening of the hard and brittle TiAl3 phase will weaken the bonding of the Ti / Al interface.

[0006] Therefore, in order to obtain a thin plate with precise and controllable thickness, the application adopts a pack cold rolling process to prepare a Ti / Al laminated plate. SUMMARY

[0007] The application aims to at least solve the technical problems in the prior art, and provides a method for preparing a Ti / Al laminated plate through pack rolling and the Ti / Al laminated plate.

[0008] In one aspect of the present application, a method for preparing a Ti / Al layered sheet by pack rolling is provided, which comprises: cutting Ti foils and Al foils into blanks and pre-treating the surface of the blanks;

[0009] treating the surface of the pack, alternately stacking the treated multi-layer Ti foils and multi-layer Al foils in the surface-treated pack, and performing a pack welding treatment;

[0010] performing a diffusion treatment on the welded pack;

[0011] rolling the diffusion-treated pack at room temperature;

[0012] removing the pack and taking out the Ti / Al layered sheet.

[0013] Optionally, the pack is a low-carbon steel pack.

[0014] Optionally, the low-carbon steel pack is any one of a Q195 low-carbon steel pack, a Q215 low-carbon steel pack, a Q235 low-carbon steel pack, a Q255 low-carbon steel pack, and a Q275 low-carbon steel pack.

[0015] Optionally, the diffusion treatment is performed at a temperature ranging from 300°C to 650°C for a holding time ranging from 10 minutes to 120 minutes.

[0016] Optionally, the rolling of the diffusion-treated pack at room temperature comprises: rolling the pack at room temperature by each pass, and performing a heat treatment between each pass until the pack is rolled to a preset deformation amount.

[0017] Optionally, the pass reduction of the rolling is 20-30%, the total rolling passes are 4-7, and the preset deformation amount is 60%-90%.

[0018] Optionally, the heat treatment is performed at a temperature ranging from 330°C to 650°C for a time ranging from 10 minutes to 120 minutes.

[0019] Optionally, the pack welding treatment adopts a four-side welding process.

[0020] Optionally, when the treated multi-layer Ti foils and multi-layer Al foils are alternately stacked in the surface-treated pack, the top layer is a Ti foil.

[0021] Optionally, the Ti / Al layered sheet has a thickness of 0.6mm-1.2mm.

[0022] In another aspect of the present application, a Ti / Al layered sheet is provided, which is prepared according to the method described above.

[0023] The application provides a method for preparing a Ti / Al layered sheet by using a sleeve and a Ti / Al layered sheet, and the method comprises the following steps: cutting a Ti foil and an Al foil into blanks, and pretreating the surface of the blanks; treating the surface of a sleeve, alternately stacking the treated multi-layer Ti foil and the multi-layer Al foil in the surface-treated sleeve, and performing a welding treatment on the sleeve; performing a diffusion treatment on the welded sleeve; rolling the diffusion-treated sleeve at room temperature; removing the sleeve, and taking out the Ti / Al layered sheet. The Ti / Al layered sheet with good combination of the Ti foil and the Al foil can be prepared by using the sleeve cold rolling, the surface of the sheet is smooth and flat after removing the sleeve, the sheet shape is good, and the Ti foil and the Al foil still maintain good coordinated deformation under the premise that the rolling deformation reaches 90%, the interface is smooth and flat, and no obvious defects are found. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The flow chart of the method for preparing the Ti / Al layered sheet by using the sleeve cold rolling is shown in the figure;

[0025] Figure 2 The process route diagram of the Ti / Al layered sheet prepared by using the sleeve cold rolling is shown in the figure;

[0026] Figure 3 The microstructure of the Ti / Al sheet with a deformation of 75% in the embodiment 1 of the application is shown in the figure, Figure 3 (A) in the figure is the microstructure of the sheet with a scale of 50 µm, Figure 3 (B) in the figure is the microstructure of the sheet with a scale of 20 µm;

[0027] Figure 4 The physical picture of the Ti / Al sheet obtained in the embodiment 2 of the application is shown in the figure;

[0028] Figure 5 The physical picture of the Ti / Al sheet obtained in the comparative example 1 of the application is shown in the figure;

[0029] Figure 6 The physical picture of the Ti / Al sheet obtained in the embodiment 3 of the application is shown in the figure;

[0030] Figure 7 The microstructure of the Ti / Al sheet obtained in the embodiment 3 of the application is shown in the figure. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the technical solutions of the present application, the application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0032] As Figure 1 and Figure 2 shown, one aspect of the present application proposes a method S100 for preparing a Ti / Al layered plate by canning and stacking, the method comprising the following steps S110-S150:

[0033] S110, cutting Ti foil and Al foil into blanks and pretreating the surface of the blanks.

[0034] Specifically, the foil blank with a thickness of 0.05-0.2 mm is selected, the Ti foil and Al foil are ultrasonically cleaned with anhydrous ethanol, and the Ti foil and Al foil are cut into square experimental blanks.

[0035] It should be noted that in step S110, the foil can be cut into blanks of a predetermined size first, and then the surface of the blank is pretreated; of course, the foil can also be pretreated first, and then the pretreated foil is cut, and the processing order is not specifically limited, and those skilled in the art can choose according to the process requirements.

[0036] It should be further noted that in the present embodiment, the thickness, size, etc. of the above-mentioned foil are not specifically limited and can be specifically set according to actual needs, for example, the above-mentioned 0.05-0.2 mm thick foil is selected and cut into a square blank of 55 mm x 55 mm, the number of layers of the foil is 41, wherein the number of layers of Ti foil is 21 and the number of layers of Al foil is 20; of course, the number of layers of the foil can also be set to 59, wherein the number of layers of Ti foil is 30 and the number of layers of Al foil is 29, and of course, other layer numbers can also be set, and the blank can be cut into other sizes and shapes.

[0037] S120, surface treatment of the can, and alternately stacking the treated multi-layer Ti foil and multi-layer Al foil in the surface-treated can, and welding the can.

[0038] Specifically, the upper and lower cover plates of the can are surface treated to remove the surface oxide skin, and the Ti foil and Al foil are alternately stacked and placed in the can, wherein the top layer is Ti foil, and then the can is welded.

[0039] In the present embodiment, since the strength of Ti foil is higher than that of Al foil, the top layer is set to Ti foil, which can withstand greater load, and the high-temperature corrosion resistance of Ti foil is better, so that the performance of the Ti / Al layered plate is better.

[0040] It is further needed to be explained that the preparation of the layered plate needs to consider the physical and chemical compatibility between the experimental materials. Due to the differences between the chemical properties and the physical properties such as strength, toughness, and thermal expansion coefficient of the Ti foil and the Al foil, it is difficult to control the coordinated deformation in the rolling process, which affects the uniformity of the structure. Therefore, the cladding process plays a key role in the design of the layered plate, and reasonable design of the cladding specification and material is of great significance to the coordinated deformation of the Ti / Al layered plate.

[0041] It is still needed to be explained that in the present embodiment, the size specification of the rolling cladding is processed according to the size of the blank, and the cladding is composed of upper and lower cover plates and a middle frame.

[0042] It is still needed to be explained that the selection of the cladding material plays an important role in the deformation compatibility and internal cracks of the plate during the rolling process. In the present embodiment, the cladding is made of low-carbon steel cladding. Compared with the current 304 stainless steel cladding, the low-carbon steel cladding has a smaller difference in the thermal expansion coefficient with the experimental materials (Ti foil and Al foil), a smaller deformation resistance in the cold rolling process, and a smaller difference in the deformation resistance of the cladding and the experimental materials, so that the plate formed by room temperature rolling is flat and smooth, and has fewer crack defects.

[0043] In some preferred embodiments, the low-carbon steel cladding can be any one of Q195 low-carbon steel cladding, Q215 low-carbon steel cladding, Q235 low-carbon steel cladding, Q255 low-carbon steel cladding, and Q275 low-carbon steel cladding, which can be specifically selected by those skilled in the art according to actual needs.

[0044] For example, when the cladding is preferably Q235 low-carbon steel cladding, it has a smaller difference in the thermal expansion coefficient with the experimental materials (Ti foil and Al foil), a smaller deformation resistance in the cold rolling process, and a smaller difference in the deformation resistance of the cladding and the experimental materials, so that the plate formed by room temperature rolling is flat and smooth, and has no obvious crack defects and no material extrusion phenomenon.

[0045] It is still needed to be explained that the welding process of the cladding also has a great influence on the final plate shape. In the present embodiment, the four-edge welding process is preferred, and the four welded edges will not enter the air during the intermediate heat treatment process, avoiding oxidation and making the rolling combination of the Ti foil and the Al foil inside the cladding good.

[0046] S130, diffusion treatment is performed on the cladded cladding.

[0047] Specifically, the temperature of the cladding pretreatment before rolling is 300-650℃, the holding time is 10-120min, and the cladding is air-cooled after the holding is completed.

[0048] In the embodiment, the flowability between the Ti foil and the Al foil is reduced by the pre-rolling diffusion treatment to obtain a more flat interface. In addition, as the diffusion temperature increases, the thickness of the diffusion layer including the diffusion intermetallic compound gradually increases at the bonding interface, resulting in the inhibition of the oxide and the improvement of the bonding strength.

[0049] S140, rolling the pre-rolling diffusion treated can at room temperature.

[0050] Specifically, the pre-rolling pretreated can is cooled to room temperature, and then the rolling is started. The heat treatment, i.e. the re-melting and holding treatment, is performed between each pass until the rolling is completed to the preset deformation amount. The pass reduction amount is controlled to be 20-30%, and the total pass number of the room temperature rolling is 4-7. The total deformation amount is 60%-90%, and the stacked foils are transformed from the original layer separation state to the layered plate with good layer-to-layer bonding. The thickness of each layer is 0.006-0.08 mm.

[0051] Further, in order to avoid serious work hardening between passes, the can is subjected to heat treatment between passes. The heat treatment temperature is 300-650°C, and the holding time is controlled to be sufficient for the can to be heated uniformly, for example, the holding time is preferably 10-120 min. In addition, the cooling mode after the re-melting and holding heat treatment is air cooling.

[0052] S160, removing the can and taking out the Ti / Al layered plate.

[0053] Specifically, the removal of the can is performed by machining, and the Ti / Al layered plate inside is taken out. The surface quality of the plate after the removal of the can is good, the plate surface is smooth and flat, and the plate shape is good without cracks.

[0054] Further, in the embodiment, based on the above process, the thickness of the Ti / Al layered sheet is 0.6-1.2 mm. Of course, the thickness is obtained based on the original thickness of the blank and other process conditions such as the deformation amount. Different original thicknesses of the blank and different deformation amounts and different process conditions will obtain different thicknesses.

[0055] The room temperature rolling process of the application is simple, and the adopted package has low cost, so as to further reduce the plate preparation cost; secondly, the package cold rolling process can promote the coordinated deformation of the plate, further optimize the uniform microstructure of the Ti / Al layered plate, so as to prepare the layered plate with good combination of Ti foil and Al foil. After removing the package, the surface of the plate is smooth and flat, and the plate shape is good, so that the Ti foil and Al foil still maintain good coordinated deformation when the rolling deformation reaches 90%, the interface is flat and smooth, and no obvious defects are found. Compared with the package hot rolling process, the cold rolling process of the application is easy to control the size precision of the sheet, avoids the generation of TiAl3 phase during the rolling process, so that the combination of Ti / Al interface is good, and the problem of difficult preparation of Ti / Al alloy plate is solved.

[0056] In another aspect of the application, a Ti / Al layered plate is provided, which is prepared according to the method described above, wherein the Ti / Al layered plate comprises a plurality of layers of Ti foil and Al foil arranged alternately, and the top layer is Ti foil.

[0057] In the embodiment, the Ti / Al layered plate has a smooth surface, good plate shape, and the sheet has a relatively long length along the rolling direction and extends uniformly along the rolling direction of the plate, and no obvious edge cracks, bulges or other defects are found. Moreover, the Ti / Al layered plate obtained by the embodiment can bear greater load and has better high-temperature corrosion resistance.

[0058] The preparation method of the Ti / Al layered plate will be further described below in combination with several specific examples:

[0059] Example 1

[0060] The preparation method of the Ti / Al layered plate in this example comprises the following steps:

[0061] S1, preparation of experimental materials: ultrasonic cleaning of raw materials Ti foil and Al foil (single layer thickness is 0.1mm) with anhydrous ethanol for 5-10min, and then cutting into experimental blanks with a size of 55mm*55mm, stacking a total of 41 layers to obtain an original thickness of 4.1mm of the blank;

[0062] S2, package treatment: the size of the rolling package is processed according to the size of the blank, the package is composed of upper and lower cover plates and a middle frame, the thickness of the upper and lower cover plates is 2mm, and the thickness of the middle frame is 5mm, Q235 low carbon steel package is selected, the surface of the upper and lower cover plates is treated, the surface oxide skin is removed, the Ti foil and Al foil are alternately stacked and placed in the package, and the package is welded on four sides;

[0063] In step S2, the number of Ti foil and Al foil stacked alternately is 21 layers and 20 layers respectively, and the outermost layer is placed with Ti foil.

[0064] S3. Pre-rolling diffusion treatment: The pre-rolling temperature of the cladding is 550℃, and it is kept at that temperature for 30 minutes. After the temperature is kept at that temperature, it is air-cooled.

[0065] S4. Room temperature rolling: After cooling the pre-treated cladding material to room temperature, rolling begins. The reduction per rolling pass is controlled at 25-30%, and the total number of passes for room temperature rolling is 4.

[0066] S5. Intermediate heat treatment: To avoid severe work hardening between passes, the cladding is subjected to intermediate heat treatment at a temperature of 550℃. The holding time is controlled to ensure that the cladding is fully and evenly heated, with a holding time of 30-90 minutes.

[0067] In step S5, the intermediate heat treatment is cooled by air after being held in the furnace. The intermediate heat treatment time after the first rolling pass is 60 minutes. As the plate is rolled thinner, the holding time is reduced to 30 minutes.

[0068] S6, the total rolling deformation is 75%, the stacked foil is rolled from the original layer-separated state of 4.1mm to 1mm, and the layered plate with good bonding between layers;

[0069] S7. Remove the casing: The casing is removed by machining to take out the internal Ti / Al layered plate.

[0070] like Figure 3 Images (A) and (B) show the microstructure of the Ti / Al layered plate obtained in Example 1. The results indicate that the Ti / Al layered plate obtained in this example has a smooth and flat interface, good interfacial bonding, and good surface quality, with no obvious cracks or pores. The Ti foil and Al foil maintained coordinated deformation, with each pass deformation not exceeding 30%, achieving coordinated deformation of the Ti / Al layers even with a deformation of 75%. Furthermore, the single-layer thickness of both the obtained Ti foil and Al foil was consistent, approximately 25 μm.

[0071] It should be noted that maintaining coordinated deformation during rolling has always been a difficult challenge, considering the physical and chemical compatibility of Ti and Al foils, and the differences in their chemical properties and physical properties such as strength, toughness, and coefficient of thermal expansion. The method described in this embodiment can overcome these problems.

[0072] Example 2

[0073] In the preparation method of the present example, three groups of blank data are respectively set, and the original thickness of the three groups of blanks in step S1 is changed to 3.7 mm, and the total rolling deformation of the three groups of stacked foils in step S6 is changed to 77%, 80% and 82% respectively, and the other steps are the same as those in example 1. Under this condition, the stacked foils of the present example are rolled from 3.7 mm in the original layer-separated state to 0.85 mm, 0.67 mm and 0.65 mm respectively.

[0074] As shown in FIG. 2, the three sheets obtained in example 2 are physical photographs, and as the rolling deformation increases, it can be seen that the length of the sheet along the rolling direction increases, the surface of the sheet is relatively flat, the sheet shape is good, and there is no obvious rolling defect at both ends of the sheet. Figure 4

[0075] Comparative example 1

[0076] The difference between the present comparative example 1 and example 2 is that: the sleeve material in step S2 is selected to be a stainless steel sleeve, such as a 304 stainless steel sleeve, three edges are welded, the total rolling deformation in step S6 is 80%, 81% and 82% respectively, and the other steps are the same as those in example 2. Under this condition, the stacked foils of the present comparative example 1 are rolled from 3.7 mm in the original layer-separated state to 0.69 mm, 0.65 mm and 0.63 mm respectively, and in the obtained three sheets, the thickness of the Ti foil and the Al foil single layer is about 18 μm, 17 μm and 17 μm respectively.

[0077] As shown in FIG. 4, the sheets prepared by using the stainless steel sleeve in comparative example 1 are physical photographs, and it can be seen that the surface of the sheet rolled by using the stainless steel sleeve in comparative example 1 is relatively uneven. Because the difference between the thermal expansion coefficient of the 304 stainless steel sleeve and the experimental blank is large, and the deformation resistance of the stainless steel sleeve is large during cold rolling, the deformation resistance of the stainless steel sleeve is much larger than the deformation resistance of the Ti / Al foil, so during the rolling process, the foils are squeezed out a lot due to the difference in deformation resistance, resulting in a large amount of material waste, and the finally formed sheet is relatively short, and the extension along the rolling direction is uneven, and there are obvious wrinkles, bulges and cracks at both ends, resulting in uneven sheet shape. Figure 5 Comparing the present comparative example 1 with the above-mentioned example 2, it can be seen that the sheet rolled by using the low-carbon steel sleeve in example 2 is flat and has good sheet shape, and the deformation resistance of the experimental foils is close to that of the low-carbon steel sleeve, so there is no waste phenomenon such as a large amount of material squeezed out, the length of the sheet in the rolling direction is relatively long, the extension along the rolling direction of the sheet is uniform, and there is no obvious edge crack, bulge, warping and other sheet defects.

[0078] Comparative example 2

[0079]

[0080] ​​The difference between the present comparative example 2 and the example 2 is that five groups of blank data are set, and the original thickness of the five groups of blanks in step S1 is changed to 4.1 mm, and the low carbon steel cladding welding process in step S2 is changed to three-side welding process, the size specifications of the low carbon steel are unchanged, and the total rolling deformation in step S6 is changed to 85%, 82%, 80%, 86% and 86% respectively, and the other steps are the same as the example 2. Under this condition, the stacked foils in the present comparative example are rolled from the original layer-separated state of 4.1 mm to 0.6 mm, 0.73 mm, 0.82 mm, 0.56 mm and 0.56 mm respectively, and among the obtained five sheets, the thickness of the Ti foil and the Al foil single layer is about 15 μm, 18 μm, 20 μm, 15 μm and 15 μm respectively.

[0081] The final rolling formed sheet of the present comparative example 2 is relatively flat, but the un-welded part is severely oxidized, and part of the sheet on both sides is also oxidized due to edge cracking and other defects during rolling. The oxidation affects the bonding between the layers to a certain extent, and the sheet with a thickness of 0.73 mm has already appeared delamination phenomenon. It can be seen that the cladding welding process has a great influence on the final shape. Since the present comparative example clads three sides, the un-welded side is severely oxidized due to air entering during the heat treatment process in the pass, which greatly deteriorates the performance of the Ti foil and the Al foil inside the cladding, thereby affecting the rolling bonding of the Ti foil and the Al foil.

[0082] Example 3

[0083] The difference between the present example 3 and the comparative example 2 is that four groups of blank data are set, and the original thickness of the blank in step S1 is changed to 5.9 mm, and the number of Ti foil and Al foil stacked alternately is 30 layers and 29 layers respectively; and the low carbon steel cladding welding process in step S2 is changed to weld four sides, and the size specifications of the low carbon steel cladding are adjusted, the thickness of the upper and lower cover plates is increased from 2 mm in the example 1 to 3.5 mm, the thickness of the middle frame is increased from 5 mm to 7 mm, and the total rolling deformation in step S6 is changed to 82%, 86%, 87% and 86% respectively, and the other processes are the same as the comparative example 2. Under this condition, the stacked foils in the present example are rolled from the original layer-separated state of 5.9 mm to 1.06 mm, 0.83 mm, 0.76 mm and 0.80 mm respectively, and among the obtained four sheets, the thickness of the Ti foil and the Al foil single layer is about 18 μm, 15 μm, 13 μm and 14 μm respectively.

[0084] As shown in Figure 6 and Figure 7 , the final rolling formed sheet of the example 3 is shown in Figure 6 , and Figure 7The microstructure of the thin plate prepared in Example 3 shows that the formed plate is flat, the surface quality is good, no obvious oxidation is observed, the combination between the layers of the thin plate is good, the thickness is uniform along the rolling direction, and no rolling defects such as warping, bulging and edge cracking are observed.

[0085] The present application provides a Ti / Al layered plate prepared by a pack rolling method and the Ti / Al layered plate, which has the following beneficial effects:

[0086] Firstly, the pack rolling method adopted in the present application is a rolling method at room temperature, which is easy to control the size of the thin plate, and the Ti / Al layered thin plate prepared by the method has good plate shape, good interface combination and good surface quality.

[0087] Secondly, the low-carbon steel pack rolling method adopted in the present application can effectively coordinate the rolling deformation and reduce the deformation stress, eliminate the defects such as edge cracking and cracking of the plate, improve the production efficiency and reduce the cost of the plate, that is, the Ti / Al layered plate with a certain deformation amount is prepared, and the high-quality Ti / Al layered thin plate with a thickness of 0.6-1.2 mm is obtained.

[0088] Thirdly, the pack rolling method adopted in the present application has low cost and simple room temperature rolling process, and the cost of the plate preparation is significantly reduced.

[0089] Fourthly, the Ti foil and the Al foil can still maintain good coordinated deformation when the rolling deformation reaches 90%, the interface is flat and smooth, and no obvious defects are observed.

[0090] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, but the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. A method for the production of Ti / Al laminated sheets by pack rolling, characterized in that, The method comprises: cutting Ti foil and Al foil into blanks, and pretreating the surface of the blanks; surface treating the cladding, alternately stacking the treated multi-layer Ti foil and multi-layer Al foil in the surface treated cladding, and welding treating the cladding; the cladding is a low-carbon steel cladding; diffusion treating the welded cladding; rolling the diffusion treated cladding at room temperature, comprising: rolling the cladding at room temperature for each pass, and heat treating between each pass until rolling to a preset deformation, the rolling pass reduction is 20-30%, the total rolling passes is 4-7, the preset deformation is 60%-90%, the temperature range of the heat treating between each pass is 300-650℃, and the time range is 10-120min; removing the cladding, and taking out the Ti / Al layered plate, the thickness of the Ti / Al layered plate is 0.6mm-1.2mm.

2. The method of claim 1, wherein, The low-carbon steel cladding is any one of Q195 low-carbon steel cladding, Q215 low-carbon steel cladding, Q235 low-carbon steel cladding, Q255 low-carbon steel cladding, and Q275 low-carbon steel cladding.

3. The method of claim 1, wherein, The temperature range of the diffusion treating is 300℃-650℃, and the holding time range is 10min-120min.

4. The method of claim 1, wherein, The cladding welding treating adopts four-side welding process.

5. The method of claim 1, wherein, When alternately stacking the treated multi-layer Ti foil and multi-layer Al foil in the surface treated cladding, the top layer is Ti foil.

6. A Ti / Al layered sheet characterized by, The method is prepared according to any one of claims 1-5. The method is prepared according to any one of claims 1-5.

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