A production method of explosion welding super-long chromium-molybdenum-vanadium hydrogen-resistant steel 12Cr2Mo1VR metal composite plate

Abstract

The application discloses a production method of an explosion-welded super-long chromium-molybdenum-vanadium hydrogen-resistant steel 12Cr2Mo1VR metal composite plate, which comprises the following steps: plate processing, plate arrangement, combined explosive frame arrangement, explosive and electronic detonator arrangement, plate withdrawal and explosion welding. According to the explosion welding explosive detonation wave movement law, different explosive detonation velocities are configured, the explosive arrangement mode is changed, the explosive detonation wave breakthrough phenomenon on the plate surface is eliminated, and the length limitation problem of the explosion-welded composite plate is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosive welding, in particular to a production method of an explosive welding super-long chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR metal composite plate. BACKGROUND

[0002] With the rapid development of China's industrial equipment manufacturing field, the requirements on chemical equipment are getting higher and higher in terms of large-scale, strict production process, and extreme corrosion medium. The demand for metal composite plates has also undergone tremendous changes. First, the quality requirements for metal composite plates are getting higher and higher, and second, the size requirements for metal composite plates are getting larger and larger. Meeting these two requirements can greatly reduce the length of the weld, improve production efficiency, reduce production cost and equipment manufacturing cycle. At present, the length of the stainless steel composite plate that can be repaired after explosive welding in China can only reach 14m, and the maximum area that can be manufactured is only 35 square meters. If the size exceeds this range, phenomena such as explosive non-repair or local reduction in bonding strength often occur at the edge, especially at the long edge, causing the composite plate to be scrapped. The reasons are as follows: first, due to the influence of the sparse wave at the boundary, the explosive detonation velocity at the middle of the plate surface will gradually increase with the increase of the plate surface length, which is higher than the explosive detonation velocity at the edge affected by the sparse wave, forming a convex phenomenon of the detonation wave array surface. This phenomenon has been confirmed by the research results published by the National Defense Science and Technology University on the propagation of explosive detonation waves. Second, as the length and width of the plate surface increase, the exhaust path between the base plates increases, the difference between the middle convex and the edge lag of the detonation wave velocity increases, which will disturb the path of high-speed exhaust gas between the two interfaces, hinder the smooth exhaust of the gas, and cause the local delamination defects at the two edges of the composite plate. Although the published patent "Local vacuum explosive welding method" can solve the explosive welding defect problem of super-long and super-wide metal plates, the structure of the vacuum device is complex, the production cost is increased, the operation is inconvenient, the production efficiency is low, and it is not suitable for batch production of enterprises. SUMMARY

[0003] In order to solve the above problems, the purpose of the present application is to provide a production method of an explosive welding super-long chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR metal composite plate. According to the explosive welding explosive detonation wave motion law, different explosive detonation velocities are configured, the explosive distribution mode is changed, the explosive detonation wave surge phenomenon on the plate surface is eliminated, and the length limitation problem of the explosive welding composite plate is effectively solved.

[0004] The technical scheme adopted by the present application to solve the above problems is as follows:

[0005] A production method of an explosive welding super-long chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR metal composite plate, comprising the following steps:

[0006] Step 1, plate processing:

[0007] oxidizing the surface to be combined of the base plate and the clad plate;

[0008] The base plate is hydrogen steel 12Cr2Mo1VR, and the length of the base plate and the clad plate is greater than 14 m.

[0009] Step two, plate arrangement:

[0010] The base plate is horizontally placed on the foundation 1, and a plurality of support columns with uniform height are arranged on the top of the base plate. Then, the surface to be combined of the clad plate is placed downward on the top of the support columns, and the positions of the base plate and the clad plate are vertically corresponding.

[0011] Step three, combined explosive frame arrangement:

[0012] The fiber board or hardboard is arranged around the top of the clad plate to form an outer explosive frame, and then a plurality of fiber boards or hardboards are arranged as partition plates in the outer explosive frame to divide the inner cavity of the outer explosive frame into three groups, i.e., a first explosive frame, a second explosive frame and a third explosive frame, to form a combined explosive frame.

[0013] Step four, explosive and electronic detonator arrangement:

[0014] The first explosive, the second explosive and the third explosive with different detonation velocities are arranged in the three explosive frames respectively, and then the electronic detonator is arranged at the center position of the explosive.

[0015] Step five, plate removal and explosive welding:

[0016] The fiber boards or hardboards as partition plates are removed, and then the electronic detonator is detonated to complete the explosive welding, and an ultra-long hydrogen steel 12Cr2Mo1VR metal clad plate is obtained.

[0017] As a further preferred scheme, in step three, the three explosive frames are staggered along the length or width direction of the clad plate, so that any two adjacent explosive frames are different in number.

[0018] As a further preferred scheme, in step three, the arrangement structure of the combined explosive frame is as follows:

[0019] The third explosive frame has one, which is arranged at the center of the length direction of the top of the clad plate and is arranged along the width direction of the clad plate;

[0020] The second explosive frame has four, which are symmetrically arranged on both sides of the third explosive frame and are arranged at the four corner edges of the clad plate;

[0021] The first explosive frame has two, which are symmetrically arranged on both sides of the third explosive frame and are arranged between the second explosive frames.

[0022] More specifically, the sum of the total length of the two second explosive frames located on both sides of the third explosive frame and the width of the third explosive frame is equal to the length of the composite plate.

[0023] The sum of the total width of the two second explosive frames located on the same side of the third explosive frame and the width of the first explosive frame is equal to the width of the composite plate.

[0024] As a further preferred solution, the width of the third explosive frame is 30-50mm, and the length is consistent with the width of the composite plate; the width of the second explosive frame is not more than 300mm.

[0025] As a further preferred solution, the detonation velocity of the first explosive, the second explosive and the third explosive is 2000-2200m / s, 2600-2800m / s and 3200-3400m / s, respectively.

[0026] As a further preferred solution, the thickness of the first explosive and the third explosive is consistent, and the thickness of the second explosive is less than that of the first explosive and the third explosive.

[0027] As a further preferred solution, in the second step, the support column is a copper rivet, the distance between each copper rivet is not less than 200mm, and the four peripheral edges of the composite plate extend at least 20mm beyond the four peripheral edges of the base plate.

[0028] As a further preferred solution, the specification size of the base plate is: thickness 100-120mm, width 2000-2500mm, length 15000-17000mm; the composite plate is austenitic stainless steel S34778, and the specification size of the composite plate is: thickness 4-6mm, width 2040-2540mm, length 15080-17080mm.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] 1. The super-long chrome-molybdenum-vanadium hydrogen-resistant steel 12Cr2Mo1VR metal composite plate produced by the present application can be more than 16m in length, completely breaking through the limitation of traditional explosive welding process which can only produce metal composite plates below 14m. By adopting the method of arranging different explosive velocities in the length direction of the plate, the problem of sudden advance of detonation wave velocity in the middle part and lag in the two sides which has been unable to overcome in the traditional explosive welding process is solved.

[0031] 2、The copper rivet adopted by the present application has the advantages of simple procurement, no need for manufacturing, easy to place, etc. compared with the V-shaped or W-shaped support body adopted by the traditional explosive welding. More importantly, since the copper rivet is small in size and the support body is cylindrical, it is beneficial to the discharge of gas at the interface. The V-shaped or W-shaped support body manufactured by the traditional process using a thin plate will block the smooth discharge of gas due to its large size and convex-concave shape, thereby increasing the probability of gas remaining at the interface and easily forming point-shaped or long strip-shaped non-adhesion defects.

[0032] 3、The super-long chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR metal composite plate produced by the present application is subjected to non-destructive testing and mechanical testing, and the results show that the bonding strength, composite rate, mechanical properties and other indicators all meet or exceed the technical requirements of the national standard GB / T 8165 and the industry standard NB / T 47002.1, and fully meet the stringent technical requirements of hydrogen-containing metal composite materials in the manufacture of large hydrogen-containing equipment, and can be applied to the manufacture of super-large hydrogen-containing chemical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a construction structure schematic diagram of the present application;

[0034] Figure 2 is a top view structure schematic diagram of the construction structure of the present application.

[0035] Markings in the figure: 1, foundation, 2, base plate, 3, composite layer plate, 4, copper rivet, 5, combined explosive frame, 6, No. 1 explosive frame, 61, No. 1 explosive, 7, No. 2 explosive frame, 71, No. 2 explosive, 8, No. 3 explosive frame, 81, No. 3 explosive, 9, electronic detonator. DETAILED DESCRIPTION

[0036] The present application will be further described below in combination with the drawings and examples.

[0037] As shown in the figure, the present application embodiment discloses a production method of an explosive-welded super-long chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR metal composite plate, which comprises the following steps:

[0038] Step one, plate processing:

[0039] The surfaces to be combined of the base plate 2 and the composite layer plate 3 are subjected to deoxidation treatment;

[0040] The base plate 2 is chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR, and the lengths of the base plate 2 and the composite layer plate 3 are both greater than 14 m;

[0041] Step two, plate arrangement:

[0042] Place the base plate 2 horizontally on the foundation 1, and uniformly place a plurality of support columns on the top of the base plate 2, and then place the superposed plate 3 with the to-be-bonding surface downward on the top of the plurality of support columns, and make the base plate 2 and the superposed plate 4 position vertically correspond; step three, combination explosive frame placement:

[0043] The fiber plate or the hardboard is placed around the top of the superposed plate 3 to form an outer explosive frame, and then a plurality of fiber plates or hardboards are placed in the outer explosive frame as a partition plate, so that the inner cavity of the outer explosive frame is divided into three groups, namely, a first explosive frame 6, a second explosive frame 7 and a third explosive frame 8, to form a combination explosive frame 5;

[0044] Step four, explosive and electronic detonator placement:

[0045] Different explosive velocities of a first explosive 61, a second explosive 71 and a third explosive 81 are placed in the three groups of explosive frames respectively, and then the electronic detonator 9 is placed at the center position of the explosive;

[0046] Step five, plate removal and explosive welding:

[0047] The fiber plate or the hardboard as the partition plate is removed, and then the electronic detonator 9 is detonated, the explosive welding is completed, and the ultra-long chrome molybdenum vanadium hydrogen steel 12Cr2Mo1VR metal composite plate is obtained.

[0048] In the present application, in view of the problems of the sudden advance of the detonation wave in the middle part of the plate and the lag of the two sides in the explosive welding of the ultra-long metal composite plate, the core is to change the placement structure of the explosive frame and the placement type of the explosive, so as to reduce the sudden advance of the detonation wave in the middle of the plate, so as to achieve the effect of parallel forward advance of the detonation wave of the whole plate, and finally realize the purpose of orderly discharge of the interface gas along the fixed path;

[0049] Specifically, the explosive velocity of the second explosive 71 arranged in the second explosive frame 7 at the edge of the plate is higher than that of the first explosive 61 in the first explosive frame 6 at the middle of the plate, which greatly reduces the sudden advance of the detonation wave in the middle of the first explosive frame region, and because the third explosive 81 with higher explosive velocity is arranged transversely in the third explosive frame 8 at the center of the plate, the detonation wave in the width direction of the plate tends to be consistent, so that the sudden advance of the detonation wave in the middle of the plate is further reduced, the effect of parallel forward advance of the detonation wave of the whole plate is achieved, the purpose of orderly discharge of the interface gas along the fixed path is realized, and the defects caused by the factors such as the sudden advance of the detonation wave velocity in the middle and the lag of the two sides are eliminated.

[0050] Firstly, the placement structure of the explosive frame:

[0051] The technical scheme of the present application creatively introduces the concept of a combined explosive frame, which is mainly divided into three groups of explosive frames, as described above, namely a first explosive frame 6, a second explosive frame 7, and a third explosive frame 8. Each numbered explosive frame corresponds to the placement of explosives with different detonation velocities, i.e., the first explosive frame 6 is placed with a first explosive 61, the second explosive frame 7 is placed with a second explosive 71, and the third explosive frame 8 is placed with a third explosive 81. In terms of structure, the three groups of explosive frames are staggered along the length or width direction of the composite board 3, so that any two adjacent explosive frames are of different numbers.

[0052] Specifically, as shown in Figure 2 , the placement structure of the combined explosive frame 5 is as follows:

[0053] The third explosive frame 8 has one, which is arranged at the center of the length direction of the top of the composite board 3 and is arranged through the width direction of the composite board 3;

[0054] The second explosive frame 7 has four, which are symmetrically arranged on both sides of the third explosive frame 8 and are arranged at the four corner edges of the composite board 3. The long side of the second explosive frame 7 is flush with the long side of the composite board 3. In the length direction, one end wall of the second explosive frame 7 is adjacent to the side wall of the third explosive frame 8 located at the center, and the other end wall directly penetrates to the end wall of the composite board 3. The space for placing the first explosive frame 6 is formed between the two second explosive frames 7 located on the same side of the third explosive frame 8;

[0055] The first explosive frame 6 has two, which are symmetrically arranged on both sides of the third explosive frame 8 and are arranged between the second explosive frames 7.

[0056] Under the placement structure of the above-mentioned combined explosive frame 5, more specifically, the total length of the two second explosive frames 7 located on both sides of the third explosive frame 8 is equal to the width of the third explosive frame 8, and the sum of the total length of the two second explosive frames 7 and the width of the third explosive frame 8 is equal to the length of the composite board 3.

[0057] The total width of the two second explosive frames 7 located on the same side of the third explosive frame 8 and the width of the first explosive frame 6 are equal to the width of the composite board 3.

[0058] In addition, regarding the size of the three groups of explosive frames, it is actually necessary to design them according to the overall size of the composite board. Generally, based on the length of the metal plate 15m, the width of the third explosive frame 8 is 30-50mm, and the length is consistent with the width of the composite board 3. The width of the second explosive frame 7 does not exceed 300mm.

[0059] Secondly, regarding the explosive:

[0060] On the basis of the structure of the combined explosive frame 5, the detonation velocities of the first explosive 61, the second explosive 71 and the third explosive 81 are 2000-2200 m / s, 2600-2800 m / s and 3200-3400 m / s respectively, and the combined explosive with the arrangement structure at the detonation velocities can effectively solve the problem of the sudden advance of the detonation wave in the middle of the plate.

[0061] In terms of the arrangement thickness, the specific thickness size also needs to be designed according to the size specifications of the metal plate, and the thickness of the metal plate is different, and the thickness of the explosive to be arranged is also different, but in general, in order to achieve the above-mentioned effect, the arrangement thickness of the first explosive 61 and the third explosive 81 is consistent, and the arrangement thickness of the second explosive 71 is smaller than that of the first explosive 61 and the third explosive 81, and in general, the thickness difference is preferably 2 mm.

[0062] Thirdly, about the support column:

[0063] The application discards the V-shaped or W-shaped support body commonly used in the traditional explosive welding process, and selects a copper rivet 4 as the support column. On the one hand, compared with the traditional support column, the copper rivet 4 is simple to purchase and does not need to be additionally processed and manufactured. On the other hand, the copper rivet 4 is small in size and has a cylindrical structure throughout, which is very beneficial to the discharge of gas at the plate bonding interface during the explosive welding process. However, the traditional support column is large in size and has a concave-convex shape, which not only cannot achieve the effect of facilitating gas discharge, but on the contrary, hinders the smooth discharge of gas, and thus point-like or long strip-like non-adhesion defects are easily formed at the bonding surface.

[0064] Specifically, the distance between each copper rivet 4 is not less than 200 mm, the four peripheral edges of the clad plate 3 each extend at least 20 mm beyond the four peripheral edges of the base plate 2, and the arrangement structure of the copper rivet 4 can adopt a rhombic structure arrangement.

[0065] About the electronic detonator 9:

[0066] The electronic detonator 9 is arranged at the center of the third explosive frame 8, and is actually also located at the center of the clad plate 3.

[0067] Preferably, in the technical scheme of the application, the size specifications of the base plate 2 are: thickness 100-120 mm, width 2000-2500 mm and length 15000-17000 mm; the clad plate 3 is austenitic stainless steel S34778, and the size specifications of the clad plate 3 are: thickness 4-6 mm, width 2040-2540 mm and length 15080-17080 mm.

[0068] It is additionally explained that the prior art has a length direction segmented or trapezoidal charge distribution mode for trying to reduce the difference between the middle and edge of the plate surface detonation wave, but the actual measurement effect is poor. The segmented or trapezoidal charge distribution mode divides three or five sections in the length direction, and the gradual reduction of the explosive detonation velocity or the reduction of the charge distribution thickness in the length direction only gradually slows down the speed of the edge and middle detonation wave in the length direction. The problem of the middle detonation wave of the plate surface still exists, so this technical means cannot actually solve the technical problem of the present application.

[0069] The above technical solutions of the present application will be described in detail below through specific embodiments:

[0070] Embodiment 1

[0071] Step one,

[0072] The base plate 2 is a chromium molybdenum vanadium hydrogen steel 12Cr2Mo1VR, the size is: thickness 100mm, width 2000mm, length 15000mm, the bonding surface is polished: the bonding surface oxide scale is removed using a sand blasting machine to expose the fresh metal surface, and the roughness is polished to be less than or equal to 2.5um using a chenille wheel;

[0073] The complex layer plate 3 is an austenitic stainless steel plate S34778, the size is: thickness 4mm, width 2040mm, length 15080mm, the bonding surface is polished: the bonding surface oxide scale is removed using a sand blasting machine to expose the fresh metal surface, and the roughness is polished to be less than or equal to 2.5um using a chenille wheel, and the plate surface is ensured to be free of pitting and wrinkles;

[0074] Step two,

[0075] The base plate 2 is placed on the foundation 1, the copper rivets 4 with a height of 8mm and a diameter of 3.5mm are placed on the base plate in a rhombus shape with an interval of 200mm, the complex layer plate 3 is placed on the copper rivets 4, and the four sides of the complex layer plate 3 extend at least 20mm beyond the four sides of the base plate 2;

[0076] Step three,

[0077] The outer frame of the charge frame is placed around the four sides of the complex layer plate 3, which is composed of a fiber plate or a hardboard with a thickness of 3mm and a height of 50mm, and then the fiber plate or the hardboard is placed as a partition plate in the outer frame of the charge frame, so that the inside of the outer frame of the charge frame is divided into multiple areas according to the structure and size shown in the figure, forming a first charge frame 6, a second charge frame 7 and a third charge frame 8, and then the first explosive 61, the second explosive 71 and the third explosive 81 are placed in the first charge frame 6, the second charge frame 7 and the third charge frame 8 respectively; Figure 2

[0078] ​In the size of the clad plate 3, the height of the first explosive 61 and the third explosive 81 is 47mm, the height of the second explosive 71 is 45mm with an error of 1mm, and the width of the third explosive 81 is 30mm;

[0079] Step four,

[0080] The electronic detonator 9 is inserted at the center of the third explosive 81 with a depth of 22-23mm;

[0081] Step five,

[0082] The fiberboard or hardboard as the separator is removed, and then the electronic detonator 9 is exploded to complete the explosion welding, and a clad plate with a size of (4+100) x 2000 x 15000mm is obtained.

[0083] In this embodiment, after the stress relief heat treatment, the mechanical properties and intergranular corrosion tests are carried out according to the standard NB / T 47002.1, and the results show that the UT flaw detection combination rate is 100% (except for the position of the initiation point), the tensile strength is 685MP, the yield strength is 510MP, the elongation is 29%, the impact value is 109J on average, the interface shear strength is 346MP, which completely exceeds the standard requirement of 210MP, the intergranular corrosion and the inner and outer bending experiments meet the standard requirements, and the technical parameters meet the requirements of the hydrogen technology conditions of the super-long chromium-molybdenum-vanadium clad plate 12Cr2Mo1VR+S34778 in large equipment manufacturing.

[0084] Example 2

[0085] Step one,

[0086] The base plate 2 is a chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR with a size of 120mm in thickness, 2500mm in width, and 17000mm in length. The bonding surface is polished by using a sandblasting machine to remove the oxidation scale and expose the fresh metal surface, and then polished by using a chenille wheel to a roughness of less than or equal to 2.5um.

[0087] The clad plate 3 is an austenitic stainless steel plate S34778 with a size of 6mm in thickness, 2540mm in width, and 17080mm in length. The bonding surface is polished by using a sandblasting machine to remove the oxidation scale and expose the fresh metal surface, and then polished by using a chenille wheel to a roughness of less than or equal to 2.5um, and the plate surface is ensured to be free of pits and wrinkles.

[0088] Step two,

[0089] Put the base plate 2 on the foundation 1, put the copper rivets 4 with the height of 10 mm and the diameter of 3.5 mm on the base plate 2 in the diamond shape with the interval of 260 mm, put the composite plate 3 on the copper rivets 4, and the four peripheral edges of the composite plate 3 extend more than 20 mm beyond the four peripheral edges of the base plate 2;

[0090] Step three,

[0091] Put the fiberboard or the hardboard with the thickness of 5 mm and the height of 70 mm as the outer frame of the medicine frame on the four peripheral edges of the composite plate 3, then put the fiberboard or the hardboard as the partition plate into the outer frame of the medicine frame, and divide the inside of the outer frame of the medicine frame into multiple areas according to the structure and the size shown in the figure to form a first medicine frame 6, a second medicine frame 7 and a third medicine frame 8, then put the first explosive 61, the second explosive 71 and the third explosive 81 into the first medicine frame 6, the second medicine frame 7 and the third medicine frame 8 respectively. Figure 2

[0092] Among them, under the size of the composite plate 3, the placing height of the first explosive 61 and the third explosive 81 is 54 mm, and the placing height of the second explosive 71 is 52 mm with the height error of 1 mm; the placing width of the third explosive 81 is 40 mm.

[0093] Step four,

[0094] Insert the electronic detonator 9 at the center of the third explosive 81, and the inserting depth of the explosive is 25-26 mm;

[0095] Step five,

[0096] Take out all the fiberboard or hardboard as the partition plate, then detonate the electronic detonator 9, complete the explosion welding, and obtain the chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR+S34778 metal composite plate with the size of (6+120)×2500×17000 mm.

[0097] In this embodiment, after the stress relief heat treatment, the mechanical properties and intergranular corrosion test are carried out according to the standard NB / T 47002.1, and the results show that the UT flaw detection combination rate is 100% (except for the position of the detonation point), the tensile strength is 695 MP, the yield strength is 545 MP, the elongation reaches 28%, the impact value is 99 J on average, the interface shear strength reaches 326 MP, which completely exceeds the standard requirement of 210 MP, the intergranular corrosion and the inside and outside bending experiments all meet the standard requirements, and the whole mechanical property parameters completely meet the requirements of the hydrogen technology conditions for the super-long chromium-molybdenum-vanadium metal composite plate 12Cr2Mo1VR+S34778 in large equipment manufacturing.

[0098] ​While the foregoing specific embodiments of the application have been described in some detail to provide a clear understanding thereof, it will be apparent to those of ordinary skill in the art that numerous modifications can be made to the specific embodiments described without departing from the spirit and scope of the application defined by the appended claims.

Claims

1. A method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate, characterized in that: The following steps are involved: Step 1: Plate processing: Deoxidizing the surfaces to be bonded of the base plate (2) and the clad plate (3); The base plate (2) is made of chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR, and the lengths of the base plate (2) and the clad plate (3) are both greater than 14 m. Step 2: Plate placement: The base plate (2) is placed horizontally on the foundation (1), and a plurality of support columns of the same height are evenly arranged on the top surface of the base plate (2) to be bonded, and then the composite plate (3) is placed on top of the plurality of support columns with the surface to be bonded facing downward, and the base plate (2) and the composite plate (3) are positioned vertically corresponding to each other; Step 3: Place the combined explosive frame: Fiberboard or cardboard is placed around the top of the composite plate (3) to form an outer explosive frame, and then multiple fiberboards or cardboards are placed inside the outer explosive frame as partitions to divide the inner cavity of the outer explosive frame into three groups, namely, a No. 1 explosive frame (6), a No. 2 explosive frame (7) and a No. 3 explosive frame (8), to form a combined explosive frame (5); The three groups of drug frames are arranged alternately along the length or width direction of the composite plate (3), so that any two adjacent drug frames have different numbers; The placement structure of the combined explosive frame (5) is as follows: The third medicine frame (8) has one, which is arranged at the center of the top length direction of the composite plate (3) and is arranged through the width direction of the composite plate (3); The second medicine frame (7) has four pieces, which are symmetrically arranged on both sides of the third medicine frame (8) and are arranged at the four corner edges of the composite plate (3); The No. 1 medicine frame (6) has two, which are symmetrically arranged on both sides of the No. 3 medicine frame (8) and are arranged between the No. 2 medicine frame (7); Step 4: Deployment of explosives and electronic detonators: Explosive No. 1 (61), explosive No. 2 (71) and explosive No. 3 (81) of different detonation velocities are placed in the three groups of explosive frames respectively, and then the electronic detonator (9) is placed at the center of the explosives; Step 5: Remove the plate and perform explosion welding: The fiberboard or cardboard used as the partition is completely removed, and then the electronic detonator (9) is detonated to complete the explosive welding, thereby obtaining an ultra-long chromium-molybdenum-vanadium hydrogen steel 12Cr2Mo1VR metal composite plate.

2. The method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate according to claim 1, wherein: The sum of the total length of the two No. 2 medicine frames (7) located on both sides of the No. 3 medicine frame (8) and the width of the No. 3 medicine frame (8) is equal to the length of the composite plate (3); The sum of the total width of the two No. 2 medicine frames (7) located on the same side of the No. 3 medicine frame (8) and the width of the No. 1 medicine frame (6) is equal to the width of the composite plate (3).

3. The method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate according to claim 1, wherein: The width of the No. 3 medicine frame (8) is 30-50 mm, and the length is consistent with the width of the composite plate (3); the width of the No. 2 medicine frame (7) does not exceed 300 mm.

4. The method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate according to claim 1, wherein: The detonation velocities of the first explosive (61), the second explosive (71) and the third explosive (81) are 2000-2200 m / s, 2600-2800 m / s and 3200-3400 m / s respectively.

5. The method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate according to claim 1, wherein: The laying thicknesses of the No. 1 explosive (61) and the No. 3 explosive (81) are the same, and the laying thickness of the No. 2 explosive (71) is smaller than the laying thicknesses of the No. 1 explosive (61) and the No. 3 explosive (81).

6. The method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate according to claim 1, characterized in that: In step 2, the support columns are copper rivets (4), the spacing between each copper rivet (4) is not less than 200 mm, and the edges of the composite plate (3) extend at least 20 mm beyond the edges of the base plate (2).

7. The method for producing an explosively welded super-long chromium-molybdenum-vanadium hydrogenated steel 12Cr2Mo1VR metal composite plate according to claim 1, characterized in that: The base plate (2) has the following specifications: thickness 100-120 mm, width 2000-2500 mm, and length 15000-17000 mm; the cladding plate (3) is austenitic stainless steel S34778, and the specifications of the cladding plate (3) are: thickness 4-6 mm, width 2040-2540 mm, and length 15080-17080 mm.

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