CN109249121B - Explosive welding method for large-breadth tool steel-steel composite plate - Google Patents
Explosive welding method for large-breadth tool steel-steel composite plate Download PDFInfo
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- CN109249121B CN109249121B CN201811300469.1A CN201811300469A CN109249121B CN 109249121 B CN109249121 B CN 109249121B CN 201811300469 A CN201811300469 A CN 201811300469A CN 109249121 B CN109249121 B CN 109249121B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
- B23K20/08—Explosive welding
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Abstract
The invention relates to an explosion welding method of a large-breadth tool steel-steel composite plate, belonging to the technical field of explosion welding of metal composite plates, and the method comprises the following steps: step one, mounting a base steel plate and a multi-layer tool steel plate by adopting a parallel method; secondly, abutting a metal detonation plate on one side of the double-layer tool steel plate, and taking the area of the detonation plate as a detonation area; step three, completely sealing the upper surface of a joint formed by the multilayer tool steel plate and the blasting plate through a transparent adhesive tape; coating a layer of butter on the upper surfaces of the multi-layer tool steel plate and the blasting plate; and fifthly, distributing explosives on the upper surfaces of the double-layer tool steel plate and the detonating plate, and placing a detonator for detonating the explosives in a detonating area formed by the detonating plate. The high-temperature conduction to the multi-layer tool steel plate can be prevented from generating large internal stress during welding, the welding quality is improved, meanwhile, the non-welding mode reduces the labor capacity, and the production efficiency of the composite plate is improved.
Description
Technical Field
The invention relates to the technical field of explosive welding of metal composite plates, in particular to an explosive welding method of a large-breadth tool steel-steel composite plate.
Background
The explosion welding is a special engineering welding technology, and the metal composite material formed by welding can have the comprehensive physical properties and the processing properties of the single metal material, and save a large amount of precious metal materials under the condition of equivalent application, thereby greatly reducing the cost. At present, the explosive welding technology is widely applied to the industrial fields of petrochemical industry, machining, metallurgy, aerospace, shipbuilding and the like. Tool steel-steel explosive composite plates are generally selected in hot rolling mill groups, working rolls, wear-resistant sliding blocks, sliding plates and housing lining plates of a hot rolling mill, the working surfaces of the tool steel-steel explosive composite plates have high wear resistance and hardness, the mounting surfaces of the tool steel-steel explosive composite plates have good impact resistance, and the mechanical properties of the bonding surfaces are the same as those of integral alloy steel.
The existing explosive welding mode generally adopts a parallel method, as shown in figure 1, a foundation, a base plate, a supporting gasket, a composite plate, explosive and a detonator are arranged, and the explosive welding is finally completed by calculating various parameters such as the proportion of the explosive, the detonation velocity, the thickness of the explosive, the height of the supporting gasket and the like according to the achieved process standard. Through repeated tests, after explosion cladding, the composite board is easy to crack, the cracks are mostly generated at the boundary of the multi-layer tool steel plate, and the main reasons are as follows:
1. the tool steel has higher hardness, but has large brittleness and poorer impact resistance, and is easy to break and crack under high-speed impact load formed after explosive explosion; in addition, when the base steel plate and the multi-layer tool steel plate are cut, cold working hardening also occurs, the boundary is easy to have the condition of uneven hardness distribution on the whole area, and the condition is also the reason for generating cracks;
2. the detonation end is positioned in the composite area and is influenced by the boundary effect, and the detonation velocity of the explosive is stabilized, so that the detonation velocity of the explosive cannot be stabilized in the period of time, the action pressure of the explosive on the composite plate is low, and the metal jet required for welding between the bonding interfaces at the boundary cannot be obtained.
In order to solve the problems, the prior art proposes a solution, for example, a chinese patent with an authorization publication number of CN103639585B discloses a method for controlling a detonator zone in explosive cladding of a thick multilayer zirconium/titanium/steel composite plate, and the technical scheme is characterized in that a detonation plate made of precious metal is welded on the multilayer plate to complete detonation outside a cladding area, but this consumes precious metal material, resulting in a great increase in production cost of products; in the process of welding the initiation plate and the clad plate, internal stress inside the clad plate can be increased due to heat conduction, and the thicker the clad steel plate is, the longer the welding time is needed, so that the higher the heat accumulated inside the clad plate is, the larger the internal stress is, and during explosive welding, the uneven detonation can directly influence the welding quality of the composite plate; in addition, the welding mode not only needs experienced welding personnel, but also takes longer time to weld, and the production efficiency of explosive welding is influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a large-breadth tool steel-steel composite plate, which can prevent high temperature from being transmitted to a double-layer tool steel plate to generate large internal stress during welding through a blasting plate abutting against one side of the double-layer tool steel plate, thereby improving the welding quality, reducing the labor capacity in a non-welding mode and improving the production efficiency of the composite plate.
The technical purpose of the invention is realized by the following technical scheme: an explosive welding method for a large-breadth tool steel-steel composite plate, wherein the tool steel-steel composite plate comprises a base steel plate and a multi-layer tool steel plate, and the explosive welding method comprises the following steps:
step one, mounting a base steel plate and a multi-layer tool steel plate by adopting a parallel method;
secondly, abutting a metal detonation plate on one side of the multiple-layer tool steel plate, taking the area of the detonation plate as a detonation area, and supporting the detonation plate through a support below the detonation plate to enable the upper surfaces of the detonation plate and the multiple-layer tool steel plate to be coplanar;
step three, completely sealing the upper surface of a joint formed by the multilayer tool steel plate and the blasting plate through a transparent adhesive tape;
coating a layer of butter on the upper surfaces of the multi-layer tool steel plate and the blasting plate;
and fifthly, distributing explosives on the upper surfaces of the multi-layer tool steel plate and the detonation plate, and placing a detonator for detonating the explosives in a detonation area formed by the detonation plate.
By adopting the technical scheme and adopting a non-welding method, the side edge of the steel plate of the clad tool is butted with the detonation plate, so that the damage to the structure of the steel plate of the clad tool caused by shearing the detonation plate at the side edge of the steel plate of the clad tool in the traditional process or the internal stress formed inside the steel plate of the clad tool caused by welding the detonation plate at the side edge of the steel plate of the clad tool can be prevented, the welding quality of the explosive composite plate is improved, and the material cost of the more expensive steel plate of the clad tool is saved; in addition, due to the adoption of a non-welding mode, the requirement of special welding personnel needing experience in the traditional process is reduced, the operation is simpler, a large amount of welding time is saved, and the production efficiency of the explosive composite plate product is improved.
Furthermore, in the second step, the coplanarity of the upper surfaces of the detonation plate and the upper surfaces of the cladding tool steel plates are ensured by adjusting the support, and the coplanarity requirement is 0.1 mm.
Through adopting above-mentioned technical scheme, detonating board and multiple layer instrument steel sheet need coplane, can be comparatively accurate like this mat formation the explosive, can be stable when guaranteeing the explosive explosion reach explosion velocity, avoid appearing the condition of basic unit's steel sheet and multiple layer instrument steel sheet border department joint degree after the explosion, improved composite sheet welding quality. A
Further, in the second step, glue is brushed on the butt joint end face of the detonating plate and the multi-layer tool steel plate, and then butt joint is completed.
Through adopting above-mentioned technical scheme, the butt joint is contradicted after the brush is glued, can make multiple layer instrument steel sheet and detonation plate butt joint inseparabler, is difficult for appearing great gap, can avoid later stage powder to fall into the failure when leading to the fact explosive welding in the gap when the explosive is mated formation simultaneously.
Further, in the fourth step, at least two detonating cords for guiding the explosive explosion are provided, and the at least two detonating cords are distributed to the opposite side line or the vertex of the cladding tool steel plate in a straight line from the detonating plate as a starting point to the opposite side of the cladding tool steel plate.
Through adopting above-mentioned technical scheme, set up two detonating cords, can guide the explosive to explode fast, the dispersion sets up and guarantees that when big breadth is compound, explosive explosion velocity is more even, improves the welding rate of composite sheet.
Further, in the fifth step, the explosive is arranged from one side of the steel plate of the cladding tool to the edge line of the base steel plate in the direction of the detonating plate in a gradient increasing thickness, and then the explosive is arranged to the tail end of the detonating plate in a maximum explosive thickness equal thickness in a gradient increasing thickness.
By adopting the technical scheme, the bonding strength of the bonding interface of the whole steel plate of the laminating tool can be uniform and consistent by adopting the unequal-thickness medicine distribution mode, and because the exciting forces generated after explosion at different thicknesses are different, the increase of stress vibration waves generated in the detonation process is restrained to a certain extent in the propagation process, so that the stress vibration strength and the tensile stress at the tail end of the composite plate can be reduced, and the phenomena of easy cracking and difficult welding at the tail end can be eliminated.
Furthermore, the model of the multi-layer tool steel plate is T8, and the size specification is as follows: 2040 × 6040 × 10 mm; the dimension of the base steel plate is as follows: 2000 x 6000 x 70mm, the height of the gasket support arranged between the clad tool steel plate and the base steel plate is 8mm, the explosive adopts 2# rock explosive, and the detonation velocity is 3000 m/s.
By adopting the technical scheme, because the explosive at the detonation end is detonated from the detonator until the detonation has an acceleration section at a stable detonation velocity, the collision velocity between the base steel plate and the multiple layer tool steel plate is less than the collision velocity at the stable detonation velocity during the detonation welding, so that the collision pressure between the two plates is lower, the problem of low welding rate at the detonation end is solved, the length of the multiple layer tool steel plate is greater than that of the base steel plate, and the detonation point is led out of the coincidence region through the detonation initiating plate, so that the stable detonation velocity can be reached when the detonation wave of the explosive is transmitted to the composite part.
Furthermore, the model of the multi-layer tool steel plate is T10, and the size specification is as follows: 1740X 890X 8 mm; the model of the base steel plate is A3, and the size specification is as follows: 1700 multiplied by 850 multiplied by 25mm, the height of a gasket support arranged between a clad tool steel plate and a base steel plate is 5mm, and 2# rock explosive is adopted as explosive, and the detonation velocity is 2700 m/s.
Further, in the step one, when the double-layer tool steel plate is a rectangular plate, the detonation plate is also a rectangular plate, and the butt joint position of the detonation plate is the middle part of the long edge of the double-layer tool steel plate.
By adopting the technical scheme, when the multilayer tool steel plate is a rectangular plate, the detonation plate is butted at the middle part of the multilayer tool steel plate, so that explosive cladding can be started from the middle part, the explosive cladding speed is increased, and the large-width tool steel plate and steel plate can be clad.
Furthermore, the material of the detonating plate comprises a tool steel plate, a steel plate and an iron plate which are made of the same material as the multi-layer tool steel plate, and other metal plates with market value lower than that of the multi-layer tool steel plate.
By adopting the technical scheme, the detonating plate can be selected from a tool steel plate, and also can be an iron plate, a steel plate and the like with market value lower than that of the tool steel plate, so that precious metals can be greatly reduced, the waste of materials of the tool steel plate is avoided, and the production cost of the composite plate is greatly reduced.
Further, the support comprises an upper plate, a lower plate and a connecting plate, wherein the upper plate and the lower plate are parallel to each other, and one side of the connecting plate is connected with the upper plate and the lower plate; the support height of the bracket = the thickness of the base steel plate + the height of the gap formed between the base steel plate and the multi-layer tool steel plate.
By adopting the technical scheme, the upper plate of the support is used for supporting the composite tool steel plate and the detonation plate, the lower plate of the support is used as a bottom support, the whole support not only can support the detonation plate, but also can assist the butt joint of the composite tool steel plate and the detonation plate, and the coplanarity between the composite tool steel plate and the detonation plate is kept.
The invention has the following beneficial effects:
1. the invention adopts a non-welding process different from the traditional process, the detonation plate and the multi-layer tool steel plate are in a butt joint mode, and the detonation plate can be replaced by an iron plate and a steel plate which have lower market value than the multi-layer tool steel plate, so that the consumption and the waste of precious metal materials are reduced, and the production cost of explosive cladding is greatly reduced;
2. the detonation plate and the cladding tool steel plate adopt a non-welding process, so that heat generated in the welding process is prevented from entering the cladding tool steel plate to form internal stress, the uniform compounding of the cladding tool steel plate and the base layer steel plate in the detonation process of explosive is ensured, and the compounding quality of the composite plate is improved;
3. the steel plate and the initiation plate of the multilayer tool adopt a non-welding process, compared with the traditional process, the requirements on the technical level of operators are reduced, the welding time is saved, the production efficiency of the composite plate is integrally improved, and meanwhile, the energy consumption is also saved;
4. according to the invention, the support is adopted to support the detonation plate, so that the detonation plate and the multi-layer tool steel plate can be ensured to be aligned smoothly, and the continuity of explosive explosion is ensured during explosive cladding.
Drawings
FIG. 1 is a schematic diagram of a parallel explosion cladding structure in a conventional process;
FIG. 2 is an elevational view of the explosive composite structure of the present invention;
FIG. 3 is a top view of the explosive composite structure of the present invention;
FIG. 4 is an elevation view of the stent structure of the present invention;
figure 5 is a top view of the stent structure of the present invention.
Reference numerals
In the attached drawings, 1, a sandy soil base layer; 2. a base steel plate; 3. a gasket; 4. a multi-layer tool steel plate; 5. an explosive; 6. a detonator; 7. a detonation plate; 8. a support; 81. an upper plate; 82. a lower plate; 83. a connecting plate; 9. a detonating cord; 10. transparent adhesive tape.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Example one
Referring first to fig. 2 and 3, fig. 2 is a front view of the explosion-clad structure of the present invention, and fig. 3 is a plan view of the explosion-clad structure of the present invention. As shown in fig. 2 and 3, the large-breadth tool steel-steel composite plate of the present invention includes a base steel plate 2 and a multi-layer tool steel plate (4), in this embodiment, the base steel plate 2 and the multi-layer tool steel plate (4) are set to be rectangular plates, and the explosion welding method includes the following steps:
step one, installing a base steel plate 2 and a multi-layer tool steel plate (4) by adopting a parallel method.
Specifically, the types and the size specifications of the selected base steel plate 2 and the selected multiple-layer tool steel plate (4) are as follows: the base steel plate 2 is A3, the size is 2000 multiplied by 6000 multiplied by 70, and the unit mm; the multi-layer tool steel plate (4) is T8, and has the size of 2040 multiplied by 6040 multiplied by 10 and the unit mm. Grinding the base steel plate 2 and the multi-layer tool steel plate (4) by using a grinding wheel to remove oxide skin on the surface, then polishing by using a vane wheel and abrasive paper, wherein the roughness of the joint surface of the treated base steel plate 2 and the multi-layer tool steel plate (4) is more than or equal to 0.5 mu m and less than or equal to Ra and less than or equal to 1.5 mu m. It should be noted that, in the selection of the sizes of the base steel plate 2 and the multi-layer tool steel plate (4), the multi-layer tool steel plate (4) should be larger than the base steel plate 2. Selecting the sandy soil ground as the basis and forming sandy soil basic unit 1, placing basic unit's steel sheet 2 according to the parallel method, arranging gasket 3 on basic unit's steel sheet 2, gasket 3 is high 8mm, later with multiple layer instrument steel sheet (4) place on gasket 3, calibration multiple layer instrument steel sheet (4) make multiple layer instrument steel sheet (4) and basic unit's steel sheet 2 keep parallel.
And secondly, abutting a metal detonating plate 7 on one side of the double-layer tool steel plate (4), taking the area of the detonating plate 7 as a detonating area, and supporting the detonating plate 7 through a bracket 8 below so that the upper surfaces of the detonating plate 7 and the double-layer tool steel plate (4) are coplanar.
Specifically, a rectangular detonation plate 7 is obtained by cutting, the detonation plate 7 is made of metal, and the detonation plate 7 can be selected to be a tool steel plate made of the same material as the multiple-layer tool steel plate (4); in order to reduce the consumption of precious metals and reduce the cost, iron plates and steel plates can be selected, and metal plates which can meet the requirement of detonation and have lower market value than the double-layer tool steel plate (4) can be used as the detonation plate 7. The middle point of the long edge of the double-layer tool steel plate (4) is selected as the mounting point of the detonating plate (7), the support (8) is placed on the basis of the long edge side of the double-layer tool steel plate (4), the detonating plate (7) is placed above the support (8), the butt joint end face of the detonating plate (7) is in butt-to-face contact with the butt joint of the double-layer tool steel plate (4), finally, the double-layer tool steel plate (4) and the detonating plate (7) are horizontally calibrated, meanwhile, the double-layer tool steel plate (4) and the detonating plate (7) are kept coplanar, a worker can use the flatness detector to detect the coplanarity, and the coplanarity requirement is 0.1 mm.
Referring to fig. 4 and 5 in combination, fig. 4 is a top view of the explosive composite structure of the present invention, and fig. 5 is a top view of the structure of the support 8 of the present invention. As shown in fig. 4 and 5, according to the technical solution of the present invention, the bracket 8 includes an upper plate 81, a lower plate 82, and a connecting plate 83, the upper plate 81 and the plates are parallel to each other, and the connecting plate 83 connects the upper plate 81 and the lower plate 82 at one side. Further, the length of the upper plate 81 is less than or equal to the length of the lower plate 82. The bracket 8 is made of wood, and the dimensions of the upper plate 81 and the lower plate 82 are 1200 × 80 × 5, unit mm. When the bracket 8 is installed, the bracket 8 is placed on the detonation side of the cladding tool steel plate (4), the supporting height of the bracket 8 is set to be H, the thickness of the base steel plate 2 is a, the height of the gap formed between the base steel plate 2 and the cladding tool steel plate (4) is b, and H = a + b.
In order to enable the double-layer tool steel plate (4) and the detonating plate 7 to be closely contacted and ensure the continuity of the explosion process, according to the technical scheme of the invention, the butt joint end surfaces of the double-layer tool steel plate (4) and the detonating plate 7 are brushed with glue and then are in contact butt joint.
And step three, completely sealing the upper surface of the joint formed by the double-layer tool steel plate (4) and the detonating plate 7 through the transparent adhesive tape 10.
Specifically, the transparent adhesive tape 10 is used for bonding and sealing from one end of the joint to the other end of the joint, so that when the explosive 5 is paved subsequently, the explosive 5 powder is prevented from entering the joint to cause explosion in the joint during explosion cladding, and the explosion cladding quality of the technical scheme is greatly improved. In addition, the thickness of the scotch tape 10 should not exceed 0.5 mm.
And step four, coating a layer of grease on the upper surfaces of the multi-layer tool steel plate (4) and the detonating plate 7.
Specifically, the surface of the steel plate (4) of the laminating tool can be ablated by the explosive 5 in the explosion process, a layer of butter is coated on the upper surfaces of the steel plate (4) of the laminating tool and the priming plate 7, the ablation can be prevented, and the thickness of the coated butter is 1-2 mm.
Fifthly, distributing explosives 5 on the upper surfaces of the double-layer tool steel plate (4) and the detonating plate 7, and placing a detonator 6 for detonating the explosives 5 in a detonating area formed by the detonating plate 7.
Specifically, the explosive cartridge is first manufactured, and then the explosive 5 prepared through the test is arranged on the upper surfaces of the butter coated on the clad tool steel plate (4) and the priming plate 7. According to the technical scheme of the invention, the explosive 5 is distributed from one side of the clad tool steel plate (4) to the edge line of the base steel plate 2 in a gradient increasing thickness direction towards the direction of the initiating plate 7, and the explosive is distributed from the edge line of the base steel plate 2 to the tail end region of the initiating plate 7 in a gradient increasing maximum explosive thickness and the like. Explosive 5 is 2# rock explosive, and the parameters of 2# rock explosive are: the detonation velocity is 3000m/s, the explosive thickness of the detonation end with the density of distributing the explosive with different thicknesses is 35mm, and the explosive thickness of the tail end is 28 mm. The upper surface of the detonating plate 7 is a detonating area for explosive cladding, the detonator 6 is vertically inserted into the explosive 5, and 3-5mg of hexogen is added within the range of 3-7mm around the detonator 6.
According to the technical scheme of the invention, at least two detonating cords 9 are arranged in the explosive 5 of the multi-layer tool steel plate (4) in order to guide and accelerate the explosion of the explosive 5 and realize large-area continuous welding. Preferably, two detonating cords 9 are provided, the two detonating cords 9 are respectively arranged from the initiation plate 7 in a linearly dispersed manner toward the opposite side of the clad tool steel plate (4), and the tail ends of the detonating cords 9 extend to the opposite side vertex or the opposite side edge of the clad tool steel plate (4). In addition, the detonating cord 9 can be replaced by powdery emulsion explosive, the detonation velocity of the powdery emulsion explosive is 4000m/s, the thickness of the detonating cord 9 made of the powdery emulsion explosive is 8mm higher than that of the No. 2 rock explosive, and the width of the detonating cord is 10 mm.
And step six, detonating the detonator 6 through the electromagnetic control device to finish the explosive welding.
And step seven, annealing heat treatment is carried out on the explosion-welded composite plate, then the explosion-welded composite plate is leveled on a leveling machine, the unevenness obtained by leveling is not more than 5mm/m, and finally the waste edges at the periphery of the cooled composite plate are sheared, polished and cleaned to obtain the large-breadth tool steel-steel composite plate.
And (3) flaw detection is carried out on the exploded composite plate according to the composite plate inspection requirements of GB/T8165-1997 stainless steel composite steel plate and steel strip and JB4733-1996 stainless steel explosion composite plate for pressure containers, wherein the bonding rate of the composite plate on the surface is 100% as a result of flaw detection, and the composite plate has no cracks and no bulges.
Example two
The difference from the first embodiment is that the models and the dimensional specifications of the base steel plate 2 and the multi-layer tool steel plate (4) are as follows:
the base steel plate 2 is A3, the size is 1700 multiplied by 850 multiplied by 25, the unit mm; the steel plate (4) of the laminating tool is T10, the size is 1740 multiplied by 890 multiplied by 8, the unit mm is mm, and the height of the gasket 3 is 5 mm.
The detonation velocity of the explosive 5 is 2700m/s, the explosive thickness of the detonation end with the density of the explosive distribution with different thicknesses is selected to be 32mm, and the explosive thickness of the tail end is 26 mm. The upper surface of the detonating plate 7 is a detonating area for explosive cladding, the detonator 6 is vertically inserted into the explosive 5, and 3-5mg of hexogen is added within the range of 3-7mm around the detonator 6.
And (3) flaw detection is carried out on the exploded composite plate according to the composite plate inspection requirements of GB/T8165-1997 stainless steel composite steel plate and steel strip and JB4733-1996 stainless steel explosion composite plate for pressure containers, wherein the bonding rate of the composite plate on the surface is 100% as a result of flaw detection, and the composite plate has no cracks and no bulges.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (7)
1. A method for explosion welding of large format tool steel-steel composite panels, said tool steel-steel composite panels comprising a base steel panel (2) and a multi-layer tool steel panel (4), the method comprising the steps of:
step one, mounting a base steel plate (2) and a multi-layer tool steel plate (4) by adopting a parallel method;
selecting a sandy soil ground as a foundation to form a sandy soil base layer (1), placing a base layer steel plate (2) according to a parallel method, arranging a gasket (3) on the base layer steel plate (2), then placing a multi-layer tool steel plate (4) on the gasket (3), and calibrating the multi-layer tool steel plate (4) to enable the multi-layer tool steel plate (4) to be parallel to the base layer steel plate (2);
secondly, abutting a metal detonating plate (7) on one side of the multi-layer tool steel plate (4), taking the area of the detonating plate (7) as a detonating area, and supporting the detonating plate (7) through a bracket (8) below to enable the upper surfaces of the detonating plate (7) and the multi-layer tool steel plate (4) to be coplanar;
brushing glue on the butt joint end surfaces of the detonation plate (7) and the multi-layer tool steel plate (4), and then finishing butt joint;
the support (8) is placed on the sandy soil base layer (1), a gap exists between the support (8) and the base layer steel plate (2), the support (8) comprises an upper plate (81), a lower plate (82) and a connecting plate (83), the upper plate (81) and the lower plate (82) are parallel to each other, and the connecting plate (83) is connected with the upper plate (81) and the lower plate (82) on one side; the support height of the bracket (8) is = the thickness of the base steel plate (2) plus the height of a gap formed between the base steel plate (2) and the multi-layer tool steel plate (4);
step three, completely sealing the upper surface of a joint formed by the multilayer tool steel plate (4) and the detonating plate (7) through a transparent adhesive tape (10);
fourthly, coating a layer of butter on the upper surfaces of the cladding tool steel plate (4) and the detonating plate (7), wherein at least two detonating cords (9) for guiding the explosive charges (5) to explode are arranged, and the at least two detonating cords (9) are distributed towards the opposite side straight line of the cladding tool steel plate (4) by taking the detonating plate (7) as a starting point until the opposite side line or the top point of the cladding tool steel plate (4);
fifthly, distributing explosives (5) on the upper surfaces of the multi-layer tool steel plate (4) and the detonating plate (7), and placing a detonator (6) for detonating the explosives (5) in a detonating area formed by the detonating plate (7).
2. The explosion welding method for large format tool steel-steel composite plates according to claim 1, characterized in that in step two, the coplanarity of the upper surfaces of both the detonation plate (7) and the multiple layer tool steel plate (4) is ensured by adjusting the bracket (8), and the coplanarity is required to be 0.1 mm.
3. The explosion welding method for large-format tool steel-steel composite plates according to claim 1, characterized in that, in step five, the explosive charges (5) are arranged in the direction of the detonating plate (7) from one side of the clad tool steel plate (4) to the borderline of the base steel plate (2) in the thickness increasing in a gradient manner, and then arranged in the maximum explosive thickness increasing in a gradient manner to the tail end of the detonating plate (7) in the same thickness manner.
4. The method for explosion welding of large format tool steel-steel composite panels according to claim 1, characterized in that the clad tool steel panels (4) are of type T8 and have the dimensions: 2040 × 6040 × 10 mm; the base steel plate (2) is A3 in model number and has the following dimensions: 2000 x 6000 x 70mm, the height supported by a gasket (3) arranged between a multi-layer tool steel plate (4) and a base steel plate (2) is 8mm, and 2# rock explosive is adopted as explosive (5), and the detonation velocity is 3000 m/s.
5. The method for explosion welding of large format tool steel-steel composite panels according to claim 1, characterized in that the clad tool steel panels (4) are of type T10 and have the dimensions: 1740X 890X 8 mm; the base steel plate (2) is A3 in model number and has the following dimensions: 1700 multiplied by 850 multiplied by 25mm, the height supported by a gasket (3) arranged between a clad tool steel plate (4) and a base steel plate (2) is 5mm, and 2# rock explosive is adopted as explosive (5), and the detonation velocity is 2700 m/s.
6. The explosion welding method for large-breadth tool steel-steel composite boards according to claim 1, characterized in that, in the first step, when the multi-layer tool steel board (4) is a rectangular board, the rectangular board is also used as the blasting board (7), and the butt joint position of the blasting board (7) is the middle of the long side of the multi-layer tool steel board (4).
7. The method for explosion welding of large format tool steel-steel composite panels according to claim 1, characterized in that the detonation plate (7) is a tool steel plate of the same material as the multiple layer tool steel plate (4), or another metal plate with a lower market value than the multiple layer tool steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300469.1A CN109249121B (en) | 2018-11-02 | 2018-11-02 | Explosive welding method for large-breadth tool steel-steel composite plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300469.1A CN109249121B (en) | 2018-11-02 | 2018-11-02 | Explosive welding method for large-breadth tool steel-steel composite plate |
Publications (2)
| Publication Number | Publication Date |
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| CN110977134A (en) * | 2019-12-20 | 2020-04-10 | 湖南方恒复合材料有限公司 | Aluminum-steel composite fastener for aluminum plate |
| CN113118705A (en) * | 2020-01-14 | 2021-07-16 | 河南辰闰科技有限公司 | Method for preventing fracture of titanium steel bimetal composite plate by explosion welding at low temperature |
| CN113941766A (en) * | 2021-09-18 | 2022-01-18 | 合肥圣达电子科技实业有限公司 | Ceramic packaging shell and preparation method thereof |
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