Production method for rolling titanium steel composite plate

Abstract

The invention provides a production method for rolling a titanium-steel composite plate, which comprises the following steps: S1, preparing raw materials: preparing two titanium middle plates, two steel billets and a frame, and machining and leveling the two titanium middle plates, the two steel billets and the frame; s2, the surface of the titanium middle plate is coated with an isolating agent; the two titanium middle plates are symmetrically placed between the two steel billets, a frame is arranged on the periphery of each titanium middle plate, a gap G is reserved between the inner side of each frame and the corresponding titanium middle plate, G = min (50, max (25, 0.0072 L + 8.4)), positioning blocks are welded to the head edge and the tail edge of each titanium middle plate, and the positioning blocks are located within the finished product trimming range; s4, heating is conducted; and S5, rolling: when the accumulative deformation is less than or equal to 30%, the single-pass deformation is less than or equal to 15%. Through the synergistic effect of gap containing extension, positioning block play prevention and small rolling reduction control coordination deformation, titanium layer wrinkle-shaped stacking is eliminated, interface full contact is ensured, the bonding rate is remarkably improved, and the problem that the titanium layers are subjected to wrinkle-shaped stacking due to extension blocking in the initial rolling stage, and consequently the interface local contact state is inconsistent is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal composite manufacturing, in particular to a production method of a rolled titanium-steel composite plate, which is a production method for solving the poor interface bonding caused by the difference in high-temperature deformation characteristics of titanium and steel in the process of rolling titanium-steel composite plate through dynamic gap design and rolling schedule optimization. BACKGROUND

[0002] Titanium-steel composite plates have been widely used in the fields of petroleum, chemical industry and marine engineering due to their excellent performance of both titanium and steel. The production methods of titanium-steel composite plates mainly include explosion composite method, diffusion composite method, explosion-rolling method and rolling composite method. Among them, the rolling composite method has become the main development direction of titanium-steel composite plate production due to its advantages of environmental protection, high efficiency and low cost.

[0003] At present, a lot of progress has been made in the research on the production of titanium-steel composite plates by rolling method, but in actual industrial application, the stability of the bonding rate still faces challenges, especially in the production of larger size plates, it is difficult to achieve effective bonding of large area and full size, resulting in increased cutting loss, reduced yield and failure to meet the contract requirements of the specified size.

[0004] Existing researches mainly focus on improving the interface shear strength, but pay little attention to the problem of large-area bonding consistency. In addition to known factors such as the surface state of raw materials and heating uniformity, the difference in titanium-steel deformation behavior during rolling may be one of the key causes: the flow stress of titanium at high temperature is significantly lower than that of steel, causing the longitudinal extension of titanium composite plate to be significantly greater than that of steel substrate under the same rolling force. Since the titanium-steel interface is only constrained by friction before compounding, there is a lack of forced deformation coordination mechanism, the excess extension of titanium plate is rigidly bound by the frame in the group structure, causing local accumulation and forming a wavy folded stack (as shown in Figure 2 This fold causes the interface to present a periodic distribution of local contact areas (peaks) and detached areas (valleys) - the contact areas can achieve metallurgical bonding under the rolling pressure, while the detached areas are blocked from atomic diffusion due to the presence of micro-gaps. This leads to a decrease in bonding area and bonding force. Existing processes rarely pay attention to the decisive influence of deformation coordination on interface contact consistency, which may be an important factor restricting the improvement of the yield of large-area plates.

[0005] Therefore, it is urgent to explore an effective method for achieving stable interface bonding of titanium-steel composite plates produced by rolling method to improve its feasibility and reliability in industrial application. SUMMARY

[0006] In view of the deformation coordination problem pointed out in the background art, the present application provides a production method of a rolled titanium steel composite plate, the core of which is to suppress the interface contact instability caused by the folded stacking of the titanium layer through the synergistic effect of dynamic gap design and rolling schedule optimization, thereby improving the bonding consistency of large-area composite plates. It should be noted that this scheme can be implemented in cooperation with raw material surface treatment, heating uniformity control and other technologies.

[0007] The technical means adopted by the present application are as follows: A production method of a rolled titanium steel composite plate, comprising the following steps: S1, raw material preparation: prepare two titanium middle plates, two steel blanks and a frame, and machine them to be flat; S2, titanium middle plate surface coating with release agent; S3, blank assembly: S31, symmetrically stack up and down in the order of steel blank-titanium middle plate-titanium middle plate-steel blank; S32, set a frame around the titanium middle plate, and leave a gap Gmm between the inner side of the frame and the titanium middle plate; S33, weld at least two titanium positioning blocks at the edge of the head and tail of the titanium middle plate, the positioning blocks are in contact with the inner side of the frame, and the welding position is within the cutting edge range of the finished product; S34, set the width of the frame; S4, heat the assembled blank to 850-950℃; S5, roll the heated assembled blank: when the cumulative deformation is ≤30%, the single pass deformation is controlled to be within 15%; when the cumulative deformation is >30%, execute according to the conventional rolling schedule.

[0008] Further, in S1, the thickness of the titanium middle plate and the steel blank is determined according to the compression ratio, the compression ratio ≥10, and the length of the steel blank = the length of the titanium middle plate + the width of the frame × 2 + 2Gmm.

[0009] Further, in S32, the gap G between the titanium middle plate and the frame satisfies: G = min(50, max(25, 0.0072L + 8.4)), where L is the length of the titanium middle plate (unit: mm).

[0010] Further, when L <2300mm, G is 25mm.

[0011] Further, in S34, the width of the frame is 50mm.

[0012] Further, in S5, when the cumulative deformation is ≤30%, the single pass deformation is within 10%.

[0013] In the present application: 1, dynamic gap blank assembly: A gap G = min(50, max(25, 0.0072L + 8.4)) (mm) is provided between the titanium middle plate and the frame, wherein L is the length of the titanium middle plate. The gap is designed to provide a buffer space for the titanium layer extension, and also to reduce the stress constraint of the frame.

[0014] Meanwhile, the titanium middle plate head and tail are welded with titanium material positioning blocks (≥2 per end). Through the close contact of the positioning blocks with the inner side of the frame, the longitudinal movement of the titanium middle plate in the rolling direction is constrained, preventing it from sliding and accumulating in the blanking cavity due to the difference in extension rate; ensuring that the titanium middle plate always maintains a predetermined relative position with the steel blank, avoiding the intensification of wrinkle-shaped stacking due to displacement in the head and tail areas; the welding position is located within the finished product cutting edge range, without loss of yield.

[0015] 2. Stage rolling control: When the cumulative deformation is ≤30%, a small reduction of ≤15% is adopted, preferably ≤10%. In this stage, the titanium steel is not yet compounded, and the small reduction can reduce the titanium steel extension rate, avoiding the impact of rapid titanium layer extension on the frame; when the cumulative deformation is >30%, the titanium steel has been initially compounded, and the conventional rolling procedure is executed.

[0016] Compared with the prior art, the present application has the following outstanding effects: 1. Elimination of interface separation caused by wrinkle-shaped stacking: through dynamic gap accommodation extension + small reduction control of extension rate, full-size bonding is ensured, especially for large-size slabs, realizing continuous contact of the full interface, which is beneficial to stable control of interface bonding.

[0017] 2. Strong engineering compatibility: the gap formula G = 0.0072L + 8.4 can be adapted to different plate lengths. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, a brief introduction to the drawings needed in the embodiments or prior art description will be given below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 The present application is a method flowchart.

[0020] Figure 2 The present application is a schematic diagram of rolling using a symmetrical grouping method.

[0021] Figure 3 The present application is a schematic diagram of the titanium and steel contact area and non-contact area existing simultaneously after rolling.

[0022] Figure 4Fig. 1 is a schematic view of the edge of the titanium intermediate plate to which the positioning block is welded.

[0023] Fig. 1 is a schematic view of the edge of the titanium intermediate plate to which the positioning block is welded. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.

[0027] Unless specifically stated otherwise, the relative arrangements of the components and steps, numerical expressions, and values set forth in the examples contained herein are not limiting of the scope of the application. It should also be understood that the size and relative sizes of the various parts shown in the figures are not necessarily to scale, and that the drawings are intended as general illustrative representations only and do not necessarily depict the actual relative or absolute sizes of the parts shown in the figures. Techniques, methods, and apparatus known to those of ordinary skill in the art can not be discussed in detail herein. However, the examples set forth herein are intended to demonstrate, at least in part, the application as claimed. In the examples shown and discussed herein, any specific values should be interpreted as merely illustrative, and not as a limitation of the application. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters in the various figures indicate like parts, and therefore, once a part is defined in one figure, it need not be discussed further in subsequent figures.

[0028] When the titanium-steel composite plate is produced by rolling, in order to avoid the warping caused by the incoordination of the deformation of the two materials, the following measures are usually taken Figure 2The shown symmetric group material is rolled. However, at high temperature, the deformation resistance of titanium is far less than that of steel, and there is no constraint between the steel base plate and the titanium complex plate except friction, which leads to the fact that the elongation of the titanium plate in the longitudinal direction is much larger than that of the steel plate under the same conditions in the initial deformation. However, the titanium plate is constrained by the frame at both ends, which leads to the fact that the longitudinal elongation cannot be freely expanded and is locally accumulated, and finally forms a wave-shaped folded stack to coordinate the deformation, thereby leading to the fact that there are two states of titanium, steel contact area and non-contact area on the interface (as shown in Figure 3 The diffusion products of the two states of the interface are completely different, which leads to the fact that the bonding area of the final product is unstable.

[0029] In order to solve the existing problems, the present application provides a production method of a rolled titanium-steel composite plate, which can improve the interface bonding rate of the titanium-steel composite plate.

[0030] As Figure 1 shown, the process flow of the rolling method for producing the titanium-steel composite plate of the present application is as follows: raw material preparation of the composite titanium plate, base plate steel billet 1 and frame 4, etc. → composite titanium plate coating isolation → symmetric group billet of the base material steel billet and the composite titanium plate → composite billet heating → composite billet rolling → offline. The present application and the implementation mode will be described in detail according to the process flow as follows: S1, raw material preparation.

[0031] The raw material preparation of the titanium-steel composite plate mainly includes the titanium middle plate and the steel billet.

[0032] The length calculation formula of the steel billet is: L 钢 =L 钛 +2×W 边框 +2G; Wherein: L 钛 : length of titanium middle plate (unit: mm); W 边框 : frame width (fixed at 50 mm to ensure welding strength); G: dynamic gap value (unit: mm), calculated according to the formula G = min(50, max(25, 0.0072L + 8.4)).

[0033] Wherein, under the premise of ensuring the welding strength, the steel billet length calculation is adjusted, and the frame width can also be other width sizes.

[0034] The steel billet, titanium middle plate and frame all need to be machined to be flat, and the oxide skin and oil stains need to be removed.

[0035] The thickness of the titanium middle plate and the steel billet needs to meet the compression ratio ≥10 (to ensure that the interface non-contact area is fully eliminated). For example, the finished product thickness is 2 mm TA2 + 8 mm Q235, the compression ratio is 15, according to the titanium steel proportional deformation calculation, the thickness of the titanium middle plate raw material should be 30 mm, and the thickness of the Q235 steel billet raw material should be 120 mm.

[0036] S2. Coat the surface of the titanium middle plate with an isolation agent.

[0037] Use anhydrous ethanol to wipe off the oil stains on the surface of the titanium middle plate, then apply an isolation agent, let it stand and dry, and form an isolation layer 3.

[0038] S3, assembly.

[0039] use Figure 2 The titanium-steel composite plate is assembled in a symmetrical manner, i.e., from top to bottom, the material is symmetrically assembled in the order of steel plate, titanium intermediate plate, titanium intermediate plate, and steel plate. A frame is provided around the titanium intermediate plate, with a gap G reserved between the inner side of the frame and the titanium intermediate plate.

[0040] Align the center point of the titanium middle plate with the steel base plate. Since there is a gap between the head and tail of the titanium middle plate and the frame to accommodate the longitudinal extension of the titanium middle plate, it is necessary to weld two positioning titanium blocks 7 (such as Figure 4 Otherwise, the titanium plate may shift within the billet cavity during billet movement or rolling, resulting in uncontrolled final plate shape and dimensional accuracy. The welding position of the positioning block should be within the trimming range of the finished product; otherwise, the normal yield rate will be affected.

[0041] After the titanium billet is fixed, the upper steel base plate is placed to overlap with the lower steel base plate.

[0042] After welding the upper and lower steel substrates to the frame, connect the steel pipe 5 to the frame and connect the external vacuum equipment to the Figure 2 The middle steel pipe 5 is connected and the interior (frame, titanium middle plate and space between steel billets) is vacuum treated. When the vacuum degree is ≤1×10 -2 After Pa, the steel pipe 5 is sealed (forming a sealing portion 6) to maintain the internal vacuum.

[0043] S4. Heating Due to the limited solid solubility between titanium and steel, brittle intermetallic compounds easily form at the interface, destroying the bond strength. Therefore, the heating temperature is typically controlled between 850°C and 950°C, preferably 900°C. Temperatures exceeding 950°C intensify diffusion and rapidly increase the number of compounds, while temperatures below 850°C increase the load on the rolling mill.

[0044] S5, rolling When the cumulative deformation is less than or equal to 30%, the single-pass deformation is controlled within 15%, preferably, a small single-pass deformation is adopted, and preferably, the single-pass deformation is controlled within 10%. When the cumulative deformation exceeds 30%, it is not necessary to consider too much. This is because, during the first several passes of rolling, the titanium and the steel have not been combined yet, at this time, there is no constraint between the titanium and the steel substrate except friction, and the deformation resistance of the titanium is much smaller than that of the steel substrate, at this time, a large single-pass deformation will cause the titanium to be rapidly elongated to the frame, and after being squeezed by the constraint of the frame, the titanium forms a wave-shaped fluctuation, and a state of partial contact between the titanium and the steel interface appears. When the cumulative deformation reaches more than 30%, the titanium and the steel have formed a preliminary combination, at this time, the titanium and the steel will be deformed cooperatively, and no wave will be generated.

[0045] The present application is suitable for producing the titanium-steel composite plate by using the direct rolling method, can be popularized in the steel enterprises, can prepare the product with high bonding strength, and has a good popularization and application prospect.

[0046] By using the production method of the titanium-steel composite plate, the interface bonding rate can be improved, and the average economic benefit can reach 0.5 ten thousand yuan / ton.

[0047] Example 1 The finished product 2mm TA2+8mm Q235 composite plate is rolled by using the method of the present application, and specifically includes the following steps: S1, the frame width is designed to be 50mm, the compression ratio is 14, the thickness of the titanium plate is determined to be 28mm according to the thickness of the finished product, and the thickness of the Q235 steel blank is 112mm. The length of the titanium plate is 6000mm, the reserved gap is min(50, 0.0072*6000+8.4)=min(50, 51.6)=50mm gap, and then the length of the steel blank is 6000+50*2+2*50=6200mm. The titanium plate and the steel blank are processed by a milling machine to ensure flatness.

[0048] S2, the titanium plate is wiped clean with anhydrous ethanol and coated with a release agent, and then is left to dry. The thickness of the release agent coating is 0.5mm.

[0049] S3, the materials are assembled according to the assembly shown in Figure 2 , and the head and tail areas of the titanium plate are welded with four positioning titanium blocks according to Figure 4 . After the assembly is completed, the inside is vacuum treated, and the vacuum degree is 0.008Pa.

[0050] S4, the heating temperature is 900℃.

[0051] S5, the reduction of the first four passes is 5%, 8%, 10% and 12% respectively, at this time, the cumulative deformation has reached 30%, and the subsequent rolling is carried out according to the model automatic setting.

[0052] After rolling, the interface bonding rate was detected by flaw detection inspection, and no unqualified area was found.

[0053] Example 2 The product 1.2mm TA2+10mm Q235 composite plate was rolled by the method of the application, and specifically included the following steps: S1, the frame width was designed to be 50mm, the compression ratio was 12, the titanium plate thickness was determined to be 14.4mm according to the product thickness, and the Q235 billet thickness was 120mm. The length of the titanium plate was 4000mm, the reserved gap was min(50, 0.0072*4000+8.4)=min(50, 37.2)≈37mm, and the length of the billet raw material was 4000+50*2+2*37=4174mm. The titanium plate and the billet were processed by a milling machine to ensure flatness.

[0054] S2, the titanium plate was cleaned with anhydrous ethanol and coated with a release agent, and then left to dry. The release agent coating thickness was 1.0mm.

[0055] S3, the materials were assembled according to the formula shown in Figure 2 , and the titanium plate head and tail area was welded with 4 positioning titanium blocks according to the formula shown in Figure 4 . After the assembly was completed, the inside was vacuum treated, and the vacuum degree was 0.007Pa.

[0056] S4, the heating temperature was 910℃.

[0057] S5, the first four passes were 5%, 5%, 8%, 10% and 12% respectively, and the cumulative deformation amount had reached 30% at this time. The subsequent rolling was carried out according to the model automatic setting.

[0058] After rolling, the interface bonding rate was detected by flaw detection inspection, and no unqualified area was found.

[0059] Example 3 The rolling product 1.0mm TA2+6mm Q345 composite plate (minimum size boundary) included the following steps: S1, the frame width was designed to be 50mm, the compression ratio was 12, the titanium plate thickness was determined to be 12mm according to the product thickness, and the Q235 billet thickness was 72mm. The length of the titanium plate was 2300mm, the reserved gap was min(50, 0.0072*2300+8.4)=max(25, 24.96)=25mm, and the length of the billet raw material was 2300+50*2+2*25=2450mm. The titanium plate and the billet were processed by a milling machine to ensure flatness.

[0060] S2, the titanium plate was cleaned with anhydrous ethanol and coated with a release agent, and then left to dry. The release agent coating thickness was 0.5mm.

[0061] S3, the materials were assembled according to the formula shown inFigure 2 As shown in the figure, the titanium middle plate and the Q235 steel base plate are aligned at the center point, and a 25mm gap is reserved between the frame. After the assembly is completed, the interior is vacuum treated, and the vacuum degree is 0.008Pa.

[0062] S4, heating temperature is 900°C.

[0063] S5, the reduction of the first 4 passes is 6%, 8%, 10%, and 10%, respectively. At this time, the cumulative deformation has reached 30%. The subsequent rolling is carried out according to the model automatic setting, and the side pressure is not used throughout the rolling process.

[0064] After rolling, the plate is separated, and no unbound area is found in the flaw detection.

[0065] Comparative Example 1 (insufficient gap, failure) The rolling product is a 2mm TA2+8mm Q235 composite plate, which specifically includes the following steps: S1, the frame width is designed to be 50mm, and the compression ratio is 14. According to the thickness of the finished product, the thickness of the titanium middle plate is 28mm, and the thickness of the Q235 steel blank is 112mm. The length of the titanium middle plate is 6000mm, and the length of the steel blank is 6100mm. The titanium middle plate and the steel blank are processed by a milling machine to ensure flatness.

[0066] S2, the titanium middle plate is cleaned with anhydrous ethanol and coated with a release agent. The release agent coating thickness is 0.5mm.

[0067] S3, the assembly is carried out as shown in the figure, and the titanium middle plate and the Q235 steel base plate are aligned at the center point. There is no gap between the frame. After the assembly is completed, the interior is vacuum treated, and the vacuum degree is 0.008Pa. Figure 2

[0068] S4, heating temperature is 900°C.

[0069] S5, the reduction of the first 4 passes is 5%, 8%, 10%, and 12%, respectively. At this time, the cumulative deformation has reached 30%. The subsequent rolling is carried out according to the model automatic setting, and the side pressure is not used throughout the rolling process.

[0070] After rolling, the plate is separated, and the flaw detection result shows that there are unbound areas in the head and tail 15m area.

[0071] Comparative Example 2 (unreasonable reduction setting, failure) The rolling product is a 1.2mm TA2+10mm Q235 composite plate, which specifically includes the following steps: ​S1, the frame width is designed to be 50 mm, the compression ratio is 12, the titanium plate thickness is determined to be 14.4 mm according to the finished product thickness, and the Q235 billet thickness is 120 mm. The titanium plate length is 5500 mm, the reserved gap = min(50, 0.0072*5500+8.4) = min(50, 48)≈48 mm, so the billet raw material length is 5500+50*2+2*48=5696 mm. The titanium plate and the billet are processed by a milling machine to ensure flatness.

[0072] S2, the titanium plate is cleaned with anhydrous ethanol and coated with a release agent, and is left to dry. The release agent coating thickness is 1.0 mm.

[0073] S3, the materials are assembled according to the Figure 2 , and the titanium plate corner area is welded with four positioning titanium blocks according to the Figure 4 . After the assembly is completed, the interior is vacuum treated, and the vacuum degree is 0.007 Pa.

[0074] S4, the heating temperature is 910°C.

[0075] S5, the first three passes are 16%, 20%, and 20%, respectively.

[0076] After rolling, there are multiple places in the head and tail 30 m range where the flaw detection result shows that it is not combined.

[0077] Comparative example 3 (positioning block missing, failure) The rolling finished product 1.2 mm TA2+10 mm Q235 composite plate specifically includes the following steps: S1, the frame width is designed to be 50 mm, the compression ratio is 12, the titanium plate thickness is determined to be 14.4 mm according to the finished product thickness, and the Q235 billet thickness is 120 mm. The titanium plate length is 5500 mm, the reserved gap = min(50, 0.0072*5500+8.4) = min(50, 48)≈48 mm, so the billet raw material length is 5500+50*2+2*48=5696 mm. The titanium plate and the billet are processed by a milling machine to ensure flatness.

[0078] S2, the titanium plate is cleaned with anhydrous ethanol and coated with a release agent, and is left to dry. The release agent coating thickness is 1.0 mm.

[0079] S3, the materials are assembled according to the Figure 2 , but the positioning titanium blocks are not prevented. After the assembly is completed, the interior is vacuum treated, and the vacuum degree is 0.007 Pa.

[0080] S4, the heating temperature is 910°C.

[0081] S5, the reduction of the first three passes is 10%, 10%, 12% respectively.

[0082] After rolling, the plates are separated, and there are multiple places in the range of 30 m at the tail where the flaw detection results show that the plates are not combined.

[0083] As shown in Figure 3 The schematic diagram of the present application shows that there are two states of titanium and steel contact area and non-contact area after rolling. This diagram is to illustrate that because of the difference between titanium and steel characteristics, the extension of the two is inconsistent in the early stage of rolling, and when the gap and reduction are not reasonable, the titanium plate deforms more, but is constrained by the frame, and will form Figure 3 The stack shown causes poor interface bonding.

[0084] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for producing a rolled titanium steel clad plate, characterized by, It comprises the following steps: S1, raw material preparation: prepare two titanium middle plates, two steel blanks and a frame, and machine and level them; S2, titanium middle plate surface coating release agent; S3, blank assembly: S31, stack symmetrically from top to bottom in the order of steel blank-titanium middle plate-titanium middle plate-steel blank; S32, set a frame around the titanium middle plate, and leave a gap Gmm between the inner side of the frame and the titanium middle plate; S33, weld at least two titanium positioning blocks on the edge of the head and tail of the titanium middle plate, the positioning blocks are in contact with the inner side of the frame, and the welding position is within the cutting edge range of the finished product; S34, set the frame width; S4, heat the assembled blank to 850-950℃; S5, roll the heated assembled blank: when the cumulative deformation is ≤30%, the single pass deformation is controlled within 15%; when the cumulative deformation is >30%, follow the normal rolling procedure.

2. The method of producing a rolled titanium steel clad plate according to claim 1, characterized by, In S1, the thickness of the titanium middle plate and the steel blank is determined according to the compression ratio, the compression ratio ≥10, and the length of the steel blank = the length of the titanium middle plate + the width of the frame × 2 + 2Gmm.

3. The method of producing a rolled titanium steel clad plate according to claim 1, characterized by, In S32, the gap G between the titanium middle plate and the frame satisfies: G = min(50, max(25, 0.0072L + 8.4)), where L is the length of the titanium middle plate, mm.

4. The method of producing a rolled titanium steel clad plate according to claim 3, characterized by, When L < 2300mm, G is 25mm.

5. The method of producing a rolled titanium steel clad plate according to claim 1, characterized by, In S34, the frame width is 50mm.

6. The method of producing a rolled titanium steel clad plate according to claim 1, characterized by, In S5, when the cumulative deformation is ≤30%, the single pass deformation is within 10%.

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