Process for preparing 3 +1 titanium steel composite plate

Abstract

The invention discloses a process for preparing a 3 + 1 titanium-steel composite plate, which comprises the following steps: by adopting a symmetrical assembly rolling method, enabling an assembly mode to sequentially comprise a steel plate, a titanium plate, a titanium plate and a steel plate from top to bottom, forming two groups of titanium-steel composite plates at one time, further rolling through a rolling process of a plate factory, and carrying out plate separation treatment after rolling is completed, two titanium-steel composite plates can be prepared at a time; and meanwhile, the problem of warping in the preparation process of the single titanium-steel composite plate is effectively prevented by adopting symmetrical assembly. In the process of preparing the titanium-steel composite plate through the technology, the two titanium plates are dry-wiped once through the non-woven fabric, ethyl alcohol is scattered after wiping is completed, new non-woven fabric is used for wiping twice in the forward direction 1-2 minutes after ethyl alcohol is scattered, and after the titanium plates are cleaned, separants are smeared on the surfaces of the upper sides and the lower sides of the titanium plates correspondingly; uniformly covering the titanium plate with the separant; and then the upper steel plate and the lower steel plate are welded through the steel bars, non-woven fabric and absolute ethyl alcohol are used again for wiping and dry wiping in the welding process, dust on the surface of the blank is removed till it is checked that the whole blank is free of oil and ash, and the composite blank subjected to argon arc welding bottoming is welded through welding rods. The welded composite blank is hoisted to a welding support to be vertically placed, vacuumizing treatment is carried out while the composite blank is welded, the steel plate and the titanium plate are tightly attached together through welding, meanwhile, the titanium plate and the steel plate are further extruded under the action of atmospheric pressure through vacuumizing, and the titanium plate and the steel plate are welded; the problems that the plastic deformation capacity difference of an existing titanium plate and an existing steel plate is large, and deformation is not coordinated are solved.

Description

Technical Field

[0001] The invention belongs to the field of preparing a 3+1 titanium-steel composite plate, and relates to a process for preparing the 3+1 titanium-steel composite plate. Background Art

[0002] In the current use of chemical industry, petroleum industry, power engineering, marine engineering, environmental protection, daily necessities, architectural decoration and other fields, tools and devices made directly from steel plates are difficult to meet the requirements of having good corrosion resistance in oxidizing, neutral and acidic media. The steel plates are corroded, which in turn affects the service life of the entire tools and devices. Titanium plates have strong corrosion resistance, but their strength is relatively low, which makes it difficult to meet the needs of industrial production. Therefore, in order to prepare a material with high strength and corrosion resistance, a titanium-steel composite plate is set.

[0003] China has been constantly trying to produce titanium steel composite plates by direct rolling. Pangang has been conducting basic laboratory research since 2013, and successfully realized industrial production of direct rolling by plate method in 2016, and achieved industrial promotion and application. On this basis, relying on Pangang's advanced equipment advantages and technical advantages, after years of hard work, R&D personnel successfully independently developed a new type of titanium steel composite plate rolled by coil method in 2020, mastered a series of key technologies for coil-rolled titanium steel composite plates, and realized industrial development. Based on the coil-rolled hot-rolled titanium steel composite plates, Pangang independently developed the coil-rolled ultra-thin cold-rolled titanium steel composite coil in 2021, and successfully realized industrial production in 2023.

[0004] The most important step in the existing preparation process of titanium-steel composite plates is assembly, which is to combine the titanium plate and the steel plate together so that the titanium plate is located between the steel plates, and then combine the titanium plate and the steel plate by welding the steel plates. However, due to the limitations of the assembly process in the existing assembly process, the proportion of titanium steel plates that are successfully prepared is relatively low, which makes it difficult to meet the needs of industrial production. Therefore, in order to solve the above-mentioned technical problems, the technical solution of the present application is set up. Summary of the invention

[0005] The purpose of the present invention is to provide a process for preparing a 3+1 titanium steel composite plate, thereby solving the above-mentioned technical problems.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A process for preparing a 3+1 titanium steel composite plate comprises the following steps:

[0008] S1: Prepare raw materials

[0009] It includes two titanium plates, two steel plates, and several steel bars;

[0010] S2: Raw material processing

[0011] 1) Steel plate processing

[0012] ①Select steel plate raw materials with no surface defects;

[0013] ②The two steel plates are processed separately by milling machines;

[0014] ③ Use the grinding wheel and the flap wheel to grind the inner surface of the steel plate in turn to remove the oxide scale of the steel plate, defects and burrs generated during the processing;

[0015] 2) Titanium plate processing

[0016] ①Select titanium plate raw materials with no surface defects;

[0017] ② Use the grinding wheel and the flap wheel to grind the titanium plate in turn and grind the two surfaces of the titanium plate respectively. The grinding temperature is less than or equal to 40°;

[0018] 3) Steel bar processing

[0019] ① Select steel bar raw materials with no surface defects, and perform straight milling on the upper and lower surfaces of the steel bar respectively;

[0020] ② Use an angle grinder to grind the steel bar to remove all the oxide scale on the steel bar until the surface of the steel bar presents a metallic color;

[0021] S3: Apply release agent

[0022] ① Use compressed air to blow the surface of steel plates, titanium plates and steel bars to remove debris and dust on the surface of steel plates, titanium plates and steel bars;

[0023] ② Dry wipe the two titanium plates with non-woven fabrics once, sprinkle them with alcohol after wiping, and wipe them twice in the forward direction with new non-woven fabrics after 1-2 minutes;

[0024] ③After the titanium plate is cleaned, apply the isolation agent on the upper and lower surfaces of the titanium plate as required, so that the isolation agent is evenly covered on the titanium plate;

[0025] ④After the isolation agent is dried, the steel plates are welded using steel bars;

[0026] S4: Assembly mode

[0027] A steel plate, a titanium plate, a titanium plate, and a steel plate are placed in sequence from top to bottom, a plurality of steel bars are respectively located between the gaps of two steel plates, and a plurality of steel bars are arranged in sequence and at equal intervals along the gaps around the steel plates;

[0028] S5: Assembly

[0029] ① Use argon arc welding to spot weld the upper and lower parts of the steel bar to the inner surface of the upper and lower steel plates respectively. Use flower welding on the inner side of the connection between the steel bar and the steel plate, and use argon arc welding on the outer side of the connection between the steel bar and the steel plate, and weld the base fully in one circle;

[0030] ② Grind the steel bars and plates, and clean the debris and dust between the blanks after welding;

[0031] ③ After grinding, the steel plate and titanium plate are wiped and dry-rubbed again with non-woven cloth and anhydrous ethanol to remove dust on the surface of the blank until the entire blank is checked to be oil-free and ash-free;

[0032] ④ The welding rod is used to weld the composite billet after argon arc welding. The welded composite billet is hoisted onto the welding bracket for vertical placement. After the composite billet is placed on the bracket, vacuum is evacuated and filled with argon gas for welding;

[0033] S6: Vacuum treatment

[0034] The composite blank is welded and vacuumed at the same time. When the actual vacuum degree inside the blank is 5.7E-3, sealing is performed.

[0035] S7: Rolling

[0036] Rolling is carried out according to the rolling process of the plate mill;

[0037] S8: Split board

[0038] The rolled titanium-steel composite plate is separated from the connection between the two titanium plates. The qualified titanium-steel composite plate is one without adhesion during the separation process. After separation, the titanium-steel plate is divided into several small plates as required.

[0039] The working principle of the present invention is: the plastic deformation capacity of the existing titanium plate and the steel plate is quite different, and the deformation is not coordinated, which makes it difficult to prepare the titanium-steel composite plate. In order to solve the above-mentioned technical problems and prevent the warping problem in the process of preparing the titanium-steel composite plate, and also to improve the yield rate of the titanium-steel composite plate, the preparation process of the present application is set up. By adopting the rolling method of symmetrical blanking, the pattern of the blanking is steel plate, titanium plate, titanium plate, and steel plate from top to bottom, so that two groups of titanium-steel composite plates are formed at one time, and then rolled through the rolling process of the plate factory. After the rolling is completed, the plate is separated, so that two titanium-steel composite plates are prepared at one time; at the same time, the symmetrical blanking is adopted in the process of the present application to effectively prevent the warping problem in the preparation process of a single titanium-steel composite plate.

[0040] Furthermore: the material of the titanium plate is Ta2, the material of the steel plate is Q235B, and the material of the steel bar is Q235B.

[0041] Furthermore: the cross-section of the steel bar is in the shape of an isosceles triangle, and the corners on both sides of the steel bar are respectively milled straight and provided with chamfers.

[0042] Furthermore: arc welding is used in S5 to manually weld the outer side of the connection between the steel bar and the steel plate, and the position of the steel bar chamfer is surfacing and filled using a J507 welding rod.

[0043] Further: in S5, three passes of welding are performed on the composite billet, and the three passes of welding include one pass of argon arc welding and two passes of 507 manual welding.

[0044] Furthermore: directly cutting the spare steel block to be cut into isosceles triangle steel bars.

[0045] Furthermore: the two titanium plates are aligned and placed with a spacing of 15-20 mm between the two titanium plates and the steel bars in the width direction and a spacing of 15-20 mm between the two titanium plates and the steel bars in the length direction.

[0046] Furthermore, the distance between the titanium plate and the steel bar in the length direction is increased by 3-5 mm, so as to increase the space between the composite blanks.

[0047] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0048] 1. A process for preparing 3+1 titanium steel composite plates, which adopts a symmetrical rolling method to make the pattern of the blanks from top to bottom be steel plate, titanium plate, titanium plate, steel plate, so that two groups of titanium steel composite plates are formed at one time, and then rolled through a plate mill rolling process, and after rolling, the plates are separated, so that two titanium steel composite plates are prepared at one time;

[0049] 2. In the present invention, the symmetrical assembly is used to effectively prevent the warping problem that occurs during the preparation of a single titanium-steel composite plate;

[0050] 3. In the present invention, the welded composite blank is hoisted onto a welding bracket and placed upright, and the composite blank is welded while being vacuumed. The steel plate and the titanium plate are tightly fitted together by welding, and the titanium plate and the steel plate are further squeezed under the action of atmospheric pressure by vacuuming, thereby solving the problem that the existing titanium plate and the steel plate have large differences in plastic deformation capacity and uncoordinated deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0052] Figure 1 It is a schematic diagram of the structure of the present invention;

[0053] Markings in the figure: 1-titanium plate, 2-steel plate, 3-steel bar. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0056] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0057] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0058] Embodiment 1

[0059] The present invention provides a process for preparing a 3+1 titanium steel composite plate, such as Figure 1 As shown, the following steps are included:

[0060] S1: Prepare raw materials

[0061] It includes two titanium plates 1, two steel plates 2, and a plurality of steel bars 3;

[0062] S2: Raw material processing

[0063] 1) Steel plate processing

[0064] ① Select steel plate 2 raw material with no surface defects;

[0065] ② The two steel plates 2 are processed by milling machines respectively;

[0066] ③ Use a grinding wheel and a flap wheel to grind the inner surface of the steel plate 2 in turn to remove the oxide scale of the steel plate 2, defects and burrs generated during the processing;

[0067] 2) Titanium plate processing

[0068] ① Select titanium plate 1 raw material with no surface defects;

[0069] ② Use a grinding wheel and a flap wheel to grind the titanium plate 1 in turn and grind the two surfaces of the titanium plate 1 respectively, and the grinding temperature is less than or equal to 40°;

[0070] 3) Steel bar processing

[0071] ① Select steel bar 3 raw materials with no surface defects, and perform straight milling on the upper and lower surfaces of the steel bar 3 respectively;

[0072] ② Grind the steel bar 3 with an angle grinder to remove all the oxide scale on the steel bar 3 until the surface of the steel bar 3 presents a metallic color;

[0073] S3: Apply release agent

[0074] ① Use compressed air to blow the surfaces of the steel plate 2, the titanium plate 1, and the steel bar 3 to remove debris and dust on the surfaces of the steel plate 2, the titanium plate 1, and the steel bar 3;

[0075] ② Dry wipe the two titanium plates 1 with non-woven fabrics once, sprinkle them with alcohol after wiping, and wipe them twice in the forward direction with new non-woven fabrics after 1-2 minutes;

[0076] ③ After the titanium plate 1 is cleaned, apply the isolation agent on the upper and lower surfaces of the titanium plate 1 as required, so that the isolation agent is evenly covered on the titanium plate;

[0077] ④ After the release agent is dried, the steel plate 2 is welded by the steel bar 3;

[0078] S4: Assembly mode

[0079] From top to bottom, a steel plate 2, a titanium plate 1, a titanium plate 1, and a steel plate 2 are placed in sequence, and a plurality of steel bars 3 are respectively located between the gaps of the two steel plates 2, and a plurality of steel bars 3 are arranged in sequence and at equal intervals along the gaps around the steel plates 2;

[0080] S5: Assembly

[0081] ① Spot weld the steel bar 3 on the inner surface of the upper and lower steel plates 2 by argon arc welding. The inner side of the connection between the steel bar 3 and the steel plate 2 is welded by flower welding, and the outer side of the connection between the steel bar 3 and the steel plate 2 is welded by argon arc welding and the bottom is welded in one circle;

[0082] ② Grind the steel bar 3 and the steel plate 2, and clean the debris and dust between the blanks after welding;

[0083] ③ After grinding, the steel plate 2 and the titanium plate 1 are wiped and dry-rubbed again with non-woven fabric and anhydrous ethanol to remove dust on the surface of the blank until the entire blank is checked to be oil-free and ash-free;

[0084] ④ The welding rod is used to weld the composite billet after argon arc welding. The welded composite billet is hoisted onto the welding bracket for vertical placement. After the composite billet is placed on the bracket, vacuum is evacuated and filled with argon gas for welding;

[0085] S6: Vacuum treatment

[0086] The composite blank is welded and vacuumed at the same time. When the actual vacuum degree inside the blank is 5.7E-3, sealing is performed.

[0087] S7: Rolling

[0088] Rolling is carried out according to the rolling process of the plate mill;

[0089] S8: Split board

[0090] The rolled titanium-steel composite plate is separated from the connection between the two titanium plates. The qualified titanium-steel composite plate is one without adhesion during the separation process. After separation, the titanium-steel plate is divided into several small plates as required.

[0091] The material of the titanium plate 1 is Ta2, the material of the steel plate 2 is Q235B, and the material of the steel bar 3 is Q235B.

[0092] The specific implementation method of this embodiment is: the plastic deformation capacity of the existing titanium plate and the steel plate is quite different, and the deformation is not coordinated, which makes it difficult to prepare the titanium-steel composite plate. In order to solve the above-mentioned technical problems and prevent the warping problem during the preparation of the titanium-steel composite plate, and also to improve the yield rate of the titanium-steel composite plate, the preparation process of this application is set up.

[0093] By adopting a symmetrical billet rolling method, the pattern of the billet assembly from top to bottom is steel plate, titanium plate, titanium plate, steel plate, so that two groups of titanium-steel composite plates can be formed at one time, and then rolled through the plate mill rolling process. After the rolling is completed, the plate is separated, so that two titanium-steel composite plates are prepared at one time; at the same time, the symmetrical billet assembly adopted in the process of this application effectively prevents the problem of warping during the preparation of a single titanium-steel composite plate.

[0094] Preferably, in the process of preparing titanium-steel composite plates by the process of the present application, the two titanium plates are dry-wiped once respectively with a non-woven fabric, and then sprinkled with alcohol. After 1-2 minutes after sprinkling with alcohol, new non-woven fabric is used to wipe twice in the forward direction. After the titanium plates are cleaned, an isolation agent is applied to the surfaces of the upper and lower sides of the titanium plates respectively, so that the isolation agent is evenly covered on the titanium plates; and then the upper and lower steel plates are welded by steel bars.

[0095] Preferably, during the welding process, non-woven fabric and anhydrous ethanol are used again for wiping and dry wiping to remove dust on the surface of the blank until the entire blank is checked to be oil-free and ash-free. The welding rod is used to weld the composite blank after argon arc welding primer. The welded composite blank is hoisted onto a welding bracket for upright placement. After the composite blank is put on the shelf, it is evacuated and filled with argon gas for welding. The composite blank is welded while being evacuated. The steel plate and the titanium plate are tightly fitted together through welding. At the same time, the titanium plate and the steel plate are further squeezed under the action of atmospheric pressure through evacuation, which solves the problem that the plastic deformation capacity of the existing titanium plate and the steel plate is quite different and the deformation is not coordinated. When the actual vacuum degree inside the blank is tested to be 5.7E-3, the sealing treatment is performed.

[0096] Preferably, in the present application, 3+1 is the total thickness of the titanium-steel composite plate after preparation, the thickness of the steel plate is 3 mm, and the thickness of the titanium plate is 1 mm.

[0097] Embodiment 2

[0098] The present invention provides a process for preparing a 3+1 titanium steel composite plate, such as Figure 1 As shown, the cross-section of the steel bar 3 is in the shape of an isosceles triangle, and the corners on both sides of the steel bar 3 are respectively milled straight and provided with chamfers.

[0099] The spare steel block to be cut is directly cut into isosceles triangle steel bars 3.

[0100] The specific implementation method of this embodiment is: by setting the shape of the steel bar to be triangular, the steel bar has strong stability and is convenient for stably connecting the upper and lower steel plates. At the same time, by directly cutting the spare steel block into the required isosceles triangle, it avoids the existing process of cutting the spare steel block into a square and then cutting it into an isosceles triangle steel bar with a chamfer, thereby solving the existing problem of deformation due to high temperature stress, resulting in more wavy defects on the chamfer surface.

[0101] The present application significantly improves the quality of steel bars by directly cutting spare steel blocks into isosceles triangles, while reducing the difficulty of grinding the edges and corners of steel bars, improving the efficiency of steel bar production, improving the accuracy of steel bars, and improving the strength of steel bar welding.

[0102] Embodiment 3

[0103] The present invention provides a process for preparing a 3+1 titanium steel composite plate, such as Figure 1 As shown, arc welding is used in S5 to manually weld the outer sides of the connection between the steel bar 3 and the steel plate 2, and the chamfered position of the steel bar 3 is surfacing and filled using a J507 welding rod.

[0104] In S5, three passes of welding are performed on the composite billet, including one pass of argon arc welding and two passes of 507 manual welding.

[0105] The specific implementation method of this embodiment is: through the combination of manual welding and machine welding, the connection between the steel bar and the steel plate is tightly fitted together, thereby enhancing the welding strength of the steel bar to the steel plate, while meeting the requirements for the fitting of the steel plate and the titanium plate.

[0106] Embodiment 4

[0107] The present invention provides a process for preparing a 3+1 titanium steel composite plate, such as Figure 1 As shown, the two titanium plates 1 are aligned and the spacing between them and the steel bars 3 in the width direction is 15-20 mm, and the spacing between them and the steel bars 3 in the length direction is 15-20 mm.

[0108] The distance between the titanium plate 1 and the steel bar 3 in the length direction is increased by 3-5 mm, so that the space between the composite blanks is increased.

[0109] The specific implementation method of this embodiment is: by setting the distance between the titanium plate and the steel bar, it is convenient to set the reserved space gap between the titanium plate and the steel bar, so as to facilitate vacuum treatment while welding, and finally it is convenient to control the actual vacuum degree inside the blank to 5.7E-3, so as to achieve the best fit between the titanium plate and the steel plate.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A process for preparing a 3+1 titanium steel composite plate, characterized in that: The following steps are involved: S1: Prepare raw materials It comprises two titanium plates (1), two steel plates (2), and a plurality of steel bars (3); S2: Raw material processing 1) Steel plate (2) Treatment ① Select steel plate (2) raw material with no surface defects; ② The two steel plates (2) are processed by a milling machine respectively; ③ Grinding the inner surface of the steel plate (2) in turn with a grinding wheel and a flap wheel to remove oxide scale, defects and burrs generated during the processing of the steel plate (2); 2) Titanium plate (1) treatment ① Selecting titanium plate (1) raw material with no surface defects; ② Use a grinding wheel and a flap wheel to grind the titanium plate (1) in sequence and grind the two surfaces of the titanium plate (1) respectively, and the grinding temperature is less than or equal to 40°; 3) Steel bar (3) Processing ① Selecting a steel bar (3) raw material with no surface defects, and performing straight milling on the upper and lower surfaces of the steel bar (3); ② Grinding the steel bar (3) with an angle grinder to remove all the oxide scale on the steel bar (3) until the surface of the steel bar (3) presents a metallic color; S3: Apply release agent ① Using compressed air to blow the surfaces of the steel plate (2), the titanium plate (1), and the steel bar (3) to remove debris and dust from the surfaces of the steel plate (2), the titanium plate (1), and the steel bar (3); ② Dry-wipe the two titanium plates (1) with a non-woven fabric, sprinkle them with alcohol, and wipe them twice in the forward direction with a new non-woven fabric 1-2 minutes after sprinkling with alcohol; ③ After the titanium plate (1) is cleaned, a release agent is applied to the upper and lower surfaces of the titanium plate (1) as required, so that the release agent is evenly covered on the titanium plate; ④ After the release agent is dried, the steel plate (2) is welded using the steel bar (3); S4: Assembly mode A steel plate (2), a titanium plate (1), a titanium plate (1), and a steel plate (2) are placed in sequence from top to bottom, a plurality of steel bars (3) are respectively located between the gaps between the two steel plates (2), and a plurality of steel bars (3) are arranged in sequence and at equal intervals along the gaps around the steel plates (2); S5: Assembly ① Spot welding the steel bar (3) at the upper and lower parts to the inner surfaces of the upper and lower steel plates (2) by using argon arc welding, spot welding is used on the inner side of the connection between the steel bar (3) and the steel plate (2), and argon arc welding is used on the outer side of the connection between the steel bar (3) and the steel plate (2) and a full circle of bottom welding is performed; ② Grind the steel bar (3) and the steel plate (2), and clean the debris and dust between the blanks after welding; ③ After grinding, the steel plate (2) and the titanium plate (1) are wiped and dry-rubbed again with non-woven fabric and anhydrous ethanol to remove dust on the surface of the blank until the entire blank is checked to be free of oil and dust; ④ The welding rod is used to weld the composite billet after argon arc welding. The welded composite billet is hoisted onto the welding bracket for vertical placement. After the composite billet is placed on the bracket, vacuum is evacuated and filled with argon gas for welding; S6: Vacuum treatment The composite blank is welded and vacuumed at the same time. When the actual vacuum degree inside the blank is 5.7E-3, sealing is performed. S7: Rolling Rolling is carried out according to the rolling process of the plate mill; S8: Split board The rolled titanium-steel composite plate is separated from the connection between the two titanium plates. The qualified titanium-steel composite plate is one without adhesion during the separation process. After separation, the titanium-steel plate is divided into several small plates as required.

2. A process for preparing a 3+1 titanium steel composite plate according to claim 1, characterized in that: The material of the titanium plate (1) is Ta2, the material of the steel plate (2) is Q235B, and the material of the steel bar (3) is Q235B.

3. The process for preparing a 3+1 titanium steel composite plate according to claim 1, characterized in that: The cross section of the steel bar (3) is in the shape of an isosceles triangle, and the corners on both sides of the steel bar (3) are respectively milled straight and provided with chamfers.

4. The process for preparing a 3+1 titanium steel composite plate according to claim 1, characterized in that: In S5, arc welding is used to manually weld the outer sides of the connection between the steel bar (3) and the steel plate (2), and the chamfered position of the steel bar (3) is welded and filled using a J507 welding rod.

5. The process for preparing a 3+1 titanium steel composite plate according to claim 1, characterized in that: In S5, three passes of welding are performed on the composite billet, including one pass of argon arc welding and two passes of 507 manual welding.

6. The process for preparing a 3+1 titanium steel composite plate according to claim 1, characterized in that: The spare steel block to be cut is directly cut into isosceles triangle steel bars (3).

7. The process for preparing a 3+1 titanium steel composite plate according to claim 1, characterized in that: The two titanium plates (1) are aligned and placed with a spacing of 15-20 mm between them and the steel bar (3) in the width direction and a spacing of 15-20 mm between them and the steel bar (3) in the length direction.

8. A process for preparing a 3+1 titanium steel composite plate according to claim 7, characterized in that: The distance between the titanium plate (1) and the steel bar (3) in the length direction is increased by 3-5 mm, so that the space between the composite blanks is increased.

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