89 results about "Explosion welding" patented technology

The invention provides a titanium steel composite plate welding interface bonding force detection method, and relates to the technical field of quality detection.The method comprises the steps that scanning is conducted from the steel substrate side of a composite plate through a single crystal normal probe, and whether an interface has a disconnection area or not is judged by analyzing the amplitude relation between interface echoes and bottom surface echoes; defining a 180-degree arc-shaped scanning path taking the explosive welding direction as a 0-degree reference axis on the surface of the composite board which is judged to be completely combined, and equally dividing the arc-shaped path into four monitoring arc sections; in each monitoring arc section, a water immersion type ultrasonic detection device is adopted, a probe is focused on the steel-titanium bonding interface, scanning is carried out along an arc-shaped scanning path, and interface ripple C scanning imaging pictures of the four monitoring arc sections are obtained respectively. According to the method, through ultrasonic detection and analysis, precise detection of the welding interface of the titanium-steel composite plate from disconnection area screening to bonding strength evaluation is achieved, interface defects can be effectively recognized, and the welding quality reliability is improved.

The application relates to the technical field of image recognition, and discloses a method for detecting explosion welding defects of plated aluminum-zinc-silicon coil plates based on X-ray images. The method acquires an X-ray image sequence of an explosion welding interface of a plated aluminum-zinc-silicon coil plate and inputs the sequence into a physical constraint feature decoupling network, the network comprising a feature extraction backbone, a physical attenuation constraint branch and a defect identification branch. The physical attenuation constraint branch calculates a physical reconstruction loss of a multi-scale space feature map according to an X-ray mass attenuation coefficient matrix of the plated aluminum-zinc-silicon alloy, and reversely propagates the loss to the feature extraction backbone as a regularization term, so as to forcibly separate speckle background features conforming to the physical attenuation law. The application makes the feature decoupling comply with the physical attenuation law, eliminates the interference of speckle artifacts on micro-defect judgment, and avoids missed detection caused by micro-defects being covered by speckles.

The invention belongs to the technical field of metal explosive cladding manufacturing, and discloses an explosive welding initiating explosive forming mold, an initiating explosive column and an explosive welding method. The mold comprises a pipe body and a cone assembled in the pipe body. The top end of the cone is upward, and a gap is reserved between the bottom face of the cone and the lower end face of the tube body, so that an upper columnar charging cavity and a lower conical energy gathering cavity are formed in the tube body. By means of the simple split design, traditional manual explosive pit digging operation is converted into a standardized process, the energy-gathered initiating explosive column with the highly-consistent shape, size and explosive loading amount is prepared, personal errors are thoroughly eliminated, and repeatability of initiation energy is guaranteed. And meanwhile, the bottom energy gathering cavity structure is beneficial to improving the energy utilization rate, and is particularly suitable for explosive welding of the multi-layer metal plate with the medium thickness. The device has the remarkable technical advantages of simple structure, low cost, time-saving operation, safety, high efficiency, batch production and the like.

The invention discloses a preparation method of a bamboo-imitating modulation structure metal composite board, and belongs to the technical field of composite material preparation, and the method comprises the following steps: by taking one or more metal boards with adjustable hardness difference as raw materials, sequentially overlapping at least three layers according to design requirements through explosive welding, carrying out heat treatment according to requirements to regulate and control the hardness difference of each layer, and carrying out heat treatment to obtain the bamboo-imitating modulation structure metal composite board. Cold deformation or thermal deformation is conducted firstly, then heat treatment is conducted, the layer thickness and proportion and element, structure and hardness distribution characteristics of all layers are regulated and controlled, and the bamboo-imitating modulation structure metal composite plate is obtained. The main heterogeneous characteristics of the composite material prepared by the method imitate a staggered structure formed by hard thick-walled cells and soft parenchyma cells in bamboos, postweld treatment can be performed according to the thickness and the proportion of the thickness required by structure property coupling enhancement so as to perform controllable adjustment, and meanwhile, the heterogeneous characteristics such as components and structures can be designed; and higher-level strength and plasticity synergy can be realized.

The invention discloses a self-repairing heat dissipation wheel based on a double-response intelligent material and a preparation process thereof, the wheel adopts a three-layer gradient composite structure and a double-trigger control system, and the three-layer structure comprises a self-repairing layer, a transition interface layer and a heat dissipation layer from outside to inside; the surface of the self-repairing layer is provided with a diamond dot matrix, and the inner side of the self-repairing layer is provided with a heating sheet; the transition interface layer is formed by explosive welding of titanium and aluminum; the heat dissipation layer comprises an aluminum alloy base body, a composite phase change material, a directional heat dissipation micro-channel, heat dissipation fins and a micro electromagnetic valve. The double-trigger system comprises a sensing module, a control module and a power supply module. The preparation technology comprises the steps of alloy preparation, explosive welding, heat dissipation structure machining, vacuum diffusion welding, phase change material vacuum infusion, function integration and the like. Micro-damage self-repairing and efficient heat dissipation are achieved, it is guaranteed that the structure is stable and matched with working conditions, the service life of wheels is prolonged, driving safety is improved, and light weight and high strength are both considered.

A heat exchanger for use in a urea production system may include a first chamber, a second chamber adjacent to the first chamber, a first tubesheet provided between the first chamber and the second chamber, a first plurality of holes provided in the tubesheet, and a plurality of tubes in fluid communication with the first chamber and extending through the second chamber. The second chamber may be sealed from the first chamber. The first tubesheet may include a first base layer and a first clad layer explosively welded to the first base layer. The first base layer may include a first carbon steel. The first clad layer may include a stainless steel alloy, a austenitic stainless steel, a superaustenitic stainless steel, a duplex stainless steel, or a superduplex steel stainless steel. The heat exchanger may be configured for use in at least one step in a urea production process.

The combined type high-strength end socket comprises an end socket body, an outer edge plate is arranged on the outer side of the opening end of the end socket body, and an annular groove is formed in the inner side of the opening end of the end socket body; a reinforcing plate assembly is embedded in the end socket body. The reinforcing plate assembly comprises a base layer, a reinforcing layer and a functional layer which are sequentially compounded from inside to outside. The base layer serves as a supporting structure, the reinforcing layer serves as a weight reduction reinforcing structure, and the functional layer is corrosion-resistant; the base layer, the reinforcing layer and the functional layer are compositely molded through explosive welding; after the reinforcing plate assembly is connected with the end socket body, the surface of the opening end and the surface of the annular groove are located on the same horizontal plane. A locking ring in threaded connection with the end socket body is arranged on the annular groove and is used for limiting the degree of freedom of axial movement of the reinforcing plate assembly relative to the end socket body. The sealing head is simple in structure, reasonable in design, low in cost and high in efficiency, a multi-layer nesting assembly procedure is omitted, and the overall gravity of the sealing head is reduced while the strength of the sealing head is improved.

The invention belongs to the technical field of metal explosive welding, and particularly relates to a corrosion-resistant hastelloy-steel composite plate and a preparation method thereof.The corrosion-resistant hastelloy-steel composite plate structurally comprises a carbon steel base layer, a nickel-based composite transition layer and a hastelloy layer which are sequentially arranged from bottom to top; the contact surface of the carbon steel base layer and the nickel-based composite transition layer is subjected to laser micro-etching treatment; the nickel-based composite transition layer is composed of a nickel-chromium alloy matrix and a corrosion inhibitor nanocapsule; the corrosion inhibitor nanocapsule is prepared by loading a compound corrosion inhibitor of sodium molybdate and benzotriazole on a mesoporous silica carrier; the corrosion-resistant hastelloy-steel composite plate structure is manufactured through an explosive welding process. The nickel-based composite transition layer containing the mesoporous silica loaded compound corrosion inhibitor nanocapsule is arranged on the carbon steel base layer subjected to laser micro-etching treatment, and then the nickel-based composite transition layer and the hastelloy layer are subjected to explosive welding, so that the binding force is improved; and stable transition and interface corrosion inhibition of the carbon steel base layer and the hastelloy layer are achieved through the nickel-based composite transition layer, and the corrosion resistance of the composite board is improved.

The invention discloses a controllable metal electric explosion driving welding device and a welding method, and relates to the technical field of metal welding. To solve the problem; the device specifically comprises a base, a flying pipe fitting and a base pipe fitting with the diameter smaller than that of the flying pipe fitting, and further comprises a rotating frame of an annular closed structure, a fixing mechanism, a tensioning assembly, a magnetic collector and a regulation and control system. According to the invention, by arranging the magnetism collecting device, the aluminum driving part, the controller, the energy storage capacitor bank, the integrated camera, the pressure sensor and the current sensor, the energy storage capacitor bank can input controllable alternating current to the coil, the driving coil generates a transient magnetic field after receiving the current and transmits the transient magnetic field to the aluminum driving part, and the aluminum driving part generates eddy current due to electromagnetic induction, so that the transient magnetic field can be controlled. The eddy current passes through Joule heat, so that the temperature of the aluminum ring is increased to a melting point in a microsecond level, then the aluminum ring enters a liquid state and a gas state until a plasma state, finally electrical explosion occurs, and the energy storage capacitor bank is controlled through the controller, so that the electrical explosion welding state of the aluminum driving part can be regulated and controlled.

The invention relates to the technical field of vacuum arc extinguish chambers, and discloses a copper stainless steel composite conducting rod prepared by an explosive welding process, the copper stainless steel composite conducting rod comprises an outer shell, the inner part of the outer shell is cooperatively provided with a static cover plate, and the top of the static cover plate is connected with a copper stainless steel composite conducting rod main body prepared by the explosive welding process; when the device is used, the mechanical strength of the inner material and the outer material is mutually enhanced, the requirements of high conductivity and high mechanical strength are met, the conducting rod is processed at one time, acid pickling is performed, assembly is simple in production, welding reliability is high, and the service life of the vacuum arc-extinguishing chamber can be prolonged; the device is provided with a stabilizing device, and protection of the outer side of the copper stainless steel composite conducting rod body prepared through the explosive welding technology is improved on the premise that normal use of the copper stainless steel composite conducting rod body prepared through the explosive welding technology is not affected; the device is provided with the protection device, the outer side of the copper stainless steel composite conducting rod body prepared through the explosive welding process is protected through the first insulation reinforcing sleeve and the second insulation reinforcing sleeve, and the service life of the device is prolonged.

The utility model relates to the field of batteries, and discloses a lithium ion battery shell explosion-proof welding protection shell which comprises a protection shell body, the protection shell body is detachably arranged at the top of an outer shell body, a groove is formed in the bottom face of the protection shell body, and the top face, close to an opening, of the outer shell body is a welding face. And threaded holes are formed in the front side and the rear side of the outer wall of the protective shell correspondingly, the two threaded holes communicate with the interior of the groove correspondingly, and bolts are in threaded connection with the interiors of the two threaded holes correspondingly. According to the utility model, the cleanliness of the welding surface is protected through the protective shell and the groove, and the protective shell and the outer shell can be effectively fixed through the threaded hole and the bolt, so that the protective shell is prevented from falling off accidentally during transfer, the welding surface of the outer shell is effectively protected, and the product quality is improved.

The invention discloses a 4J29 kovar alloy / 304 stainless steel composite plate and a preparation method thereof, and belongs to the technical field of metal composite plate production, a 4J29 kovar alloy plate and a 304 stainless steel plate in a cold rolling state are respectively subjected to recrystallization annealing treatment to obtain a soft 4J29 kovar alloy plate and a soft 304 stainless steel plate, then the soft 304 stainless steel plate is used as a base plate, and the 4J29 kovar alloy plate and the soft 304 stainless steel plate are subjected to heat treatment to obtain the 4J29 kovar alloy / 304 stainless steel composite plate. A soft 4J29 kovar alloy plate serves as a compound plate, the surface of the soft 4J29 kovar alloy plate is coated with a layer of water glass to serve as a protective layer, then an explosive layer is laid on the surface of the protective layer in a gradient explosive distribution mode, then explosive cladding is conducted, the composite plate is obtained, a bonding area of the composite plate has the uniform and continuous microwave shape characteristic, the interface bonding rate is larger than or equal to 98.9%, and the bonding strength is larger than 360 MPa. The explosive welding composite board with excellent performance is prepared, and corresponding technical conditions meet industrial production requirements.

The invention discloses a dedusting flocculant, a preparation method thereof and a dedusting method in an explosive welding construction process, and relates to the technical field of environmental protection and dedusting. The dedusting flocculant is prepared from the following raw materials in percentage by volume: 3 to 7 percent of liquid polyaluminum chloride, 0.08 to 0.12 percent of polyacrylamide solution, 0.8 to 1.2 percent of sodium silicate solution and the balance of water. Meanwhile, the invention further discloses a dust removal method adopting the dust removal flocculant in the explosive welding construction process. The preparation method of the flocculant provided by the invention is simple, all the components are sequentially added under a medium-temperature stirring condition, and the preparation method is simple and easy to operate. Besides, assistance of other electric and movable equipment is not needed, detonating cords or waterproof explosives commonly used in explosion operation are adopted in the fogging mode, the fogging mode is more reliable, the detonating cords are detonated before each time of explosive welding in a millisecond detonating mode, a flocculating agent is promoted to form a dust removal water mist area above an explosion area, dust sedimentation is accelerated by forming large particles, and the dust removal efficiency is improved. The dust removal efficiency can be obviously improved, and the explosive welding detonation frequency is improved.

The invention discloses a preparation method of a composite target inlaid with a non-metallic material and the composite target, and relates to the technical field of physical vapor deposition coating target materials, the preparation method comprises the following steps: a titanium plate and a copper plate are subjected to explosive welding to form a base material, and a plurality of blind holes are formed in the surface of the titanium plate of the base material; processing a to-be-inlaid non-metallic material into a shape matched with the blind hole; coating conductive silver adhesive in the plurality of blind holes, and placing the to-be-inlaid non-metallic material in the plurality of blind holes to obtain a to-be-cured composite target material; and the to-be-cured composite target material is put into a vacuum curing furnace to be subjected to stepped heating, heat preservation and curing treatment, and the target composite target material is obtained. The technical problems of poor conductivity and target explosion of the target material in the prior art are relieved.

The present invention relates to the field of vacuum explosion welding technology, and specifically to a vacuum explosion welding production workshop, comprising a workshop body, an explosion welding bed system, a linear transport system, and a pre-installation system. The workshop body comprises a circular arched steel column, a sealed shell, a reinforcing rib plate, an energy-absorbing material, and a protective, explosion-proof, and energy-consuming structure. A cavity is formed between the sealed shell and the circular arched steel column. Door bodies are provided at both ends of the sealed shell along the transport direction of the linear transport system. The reinforcing rib plate is provided in the cavity, the energy-absorbing material is filled in the cavity, and the protective, explosion-proof, and energy-consuming structure is provided inside the circular arched steel column. The present invention ensures that all types of impacts caused by the explosion are controlled within the range allowed by personnel safety and building safety, ensures good product quality, and reduces the use of explosives, thereby improving overall production efficiency.

The utility model relates to the technical field of composite board processing, in particular to a copper-steel composite board explosive welding protection device which comprises a welding platform, a protection box is arranged above the welding platform, a limiting ring is installed above the inner wall of a fixing ring, a filter plate is arranged at the bottom of the limiting ring, a movable ring is arranged at the bottom of the filter plate, and the movable ring is arranged on the inner wall of the fixing ring. An internal thread is arranged on the lower portion of the inner wall of the fixed ring, an external thread is arranged on the outer side wall of the movable ring, connecting blocks are arranged on the two sides of the protection box, a lifting assembly for adjusting the height of the connecting blocks is arranged on the welding platform, and an overturning assembly capable of enabling the protection box to rotate is arranged on the connecting blocks. Through the arrangement of the turnover assembly, the driving motor drives the turnover assembly to rotate by 90 degrees, the protection box rotates by 90 degrees, the bottom of the protection box faces a worker, the worker does not need to stand under the protection box and only needs to stretch hands into the protection box, safety is higher, the two ends of the protection box are additionally arranged, and operation is better.

The present invention provides a method for preparing a CoCrNi medium-entropy alloy / 316L stainless steel composite sheet, belonging to the field of metal-based composite material forming. The preparation method comprises: preparing a CoCrNi medium-entropy alloy / 316L stainless steel composite thick plate by explosive welding; cutting a blank with good interface bonding from the composite thick plate; then performing multiple-pass hot rolling; annealing the hot-rolled plate and then performing multiple-pass cold rolling; stress relief annealing after cold rolling, and air cooling to obtain the medium-entropy alloy / stainless steel composite sheet. The CoCrNi medium-entropy alloy / 316L stainless steel composite sheet obtained by this method has uniform thickness, a flat bonding surface, excellent mechanical properties, a simple production process, and is suitable for industrial production.

The invention discloses a connecting structure between conductive parts, which comprises a first conductive part, a second conductive part and an insert, the first conductive part is provided with a first connecting hole, the second conductive part is stacked on the first conductive part, the insert is arranged in the first connecting hole, and the insert is connected with the first conductive part through laser welding. And the insert is fixedly mounted on the second conductive component. The first conductive part and the second conductive part are connected through the insert, so that the insert and the first conductive part as well as the insert and the second conductive part obtain enough butt joint surfaces, and a combined connection structure of laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding and cold pressing connection is adopted; and the connection strength of the first conductive part and the second conductive part is improved.

A heat exchanger for use in a urea production system may include a first chamber, a second chamber adjacent to the first chamber, a first tubesheet provided between the first chamber and the second chamber, a first plurality of holes provided in the tubesheet, and a plurality of tubes in fluid communication with the first chamber and extending through the second chamber. The second chamber may be sealed from the first chamber. The first tubesheet may include a first base layer and a first clad layer explosively welded to the first base layer. The first base layer may include a first carbon steel. The first clad layer may include a stainless steel alloy, a austenitic stainless steel, a superaustenitic stainless steel, a duplex stainless steel, or a super-duplex steel stainless steel. The heat exchanger may be configured for use in at least one step in a urea production process.

The invention provides a hastelloy alloy composite plate for a pressure vessel, which comprises a base layer, a transition layer and a covering layer, the base layer, the transition layer and the covering layer are sequentially arranged from bottom to top, the composite plate is formed through explosive welding, the base layer is a low alloy steel plate, the transition layer is a stainless steel plate, and the covering layer is a hastelloy alloy plate. The invention further provides a manufacturing process of the hastelloy alloy composite plate for the pressure vessel and a manufacturing process of the hastelloy alloy composite plate seal head for the pressure vessel. In the invention, the S31603 stainless steel plate is respectively connected with the Q345R low-alloy steel plate and the hastelloy B3 plate as a transition layer, so that the huge physical and chemical property difference between the Q345R low-alloy steel plate and the hastelloy B3 plate is reduced, the formation tendency of an interface hard and brittle structure is obviously reduced, and the bonding quality between bonding surfaces is improved; and the work hardening crack phenomenon of the joint surface during small-curvature forming is eliminated, and the overall strength, the service life and the use safety of the winding drum or the end socket are improved. The invention belongs to the technical field of composite boards.

The invention relates to an explosive welding preparation method of a high-strength steel / high-toughness steel layered composite material, and belongs to the technical field of metal layered composite materials. The maraging steel and the austenitic stainless steel which are subjected to solution treatment are subjected to explosive welding and aging treatment to obtain the composite material with matched strength and toughness. The maraging steel obtains a supersaturated low-carbon lath martensite structure through solution treatment, the hardness is low and the plasticity is good in the state, and a good bonding interface can be formed during explosive welding; aging treatment is integrally carried out after welding, so that nanoscale intermetallic compounds are separated out from martensite phases, the strength and toughness of a welded plate are remarkably improved, meanwhile, embrittlement of a welding heat affected zone is avoided, and overall toughness synergy of the composite material is achieved.

The utility model relates to the technical field of welding, and discloses surface coating equipment for explosive welding of alloy composite boards, which comprises a shell, a movable door is movably mounted on one side of the shell, two conveying screws are movably mounted in the shell, movable sleeves are sleeved on the circumferences of the conveying screws, and the movable sleeves are sleeved on the movable door. The outer wall of the shell is provided with a first driving motor used for driving the conveying screw to rotate, and the bottom of the movable sleeve is provided with a lifting seat through a third telescopic component. The two sides of an alloy composite plate are clamped and fixed through the clamping mechanism, and the first driving motor is combined to drive the conveying screw to rotate; automatic conveying and uniform coating of the alloy composite plate are achieved, the complexity of manual operation is reduced, the working efficiency is improved, the position of the lifting base is adjusted through the third telescopic component, the coating thickness can be accurately adjusted according to different requirements, diversified production requirements are met, a coating layer can be more uniform, and the production efficiency is improved. And the situation that the coating thickness is inconsistent in a traditional method is avoided.

The invention belongs to the technical field of explosive welding metal composite plate production and manufacturing, and provides a Q490DRL1 explosive welding composite plate for a low-temperature storage tank and a preparation method of the Q490DRL1 explosive welding composite plate. The preparation method comprises the following steps: respectively pre-treating a substrate Q490DRL1 and clad plate stainless steel to obtain a pre-treated substrate and a pre-treated clad plate; the pretreated base plate is placed on a blasting bed, a pretreated covering plate is installed after a supporting piece is placed on the pretreated base plate, explosive welding is conducted after explosive is laid on the pretreated covering plate, and an explosive welding composite system is obtained; the supporting sheet is a W-shaped supporting sheet; and the explosive welding composite system is subjected to heat treatment, and the Q490DRL1 explosive welding composite board for the low-temperature storage tank is obtained. According to the Q490DRL1 explosive welding composite plate for the low-temperature storage tank, the dilemma that high strength and low-temperature toughness of a traditional material are difficult to consider at the same time is broken through, and excellent toughness can still be kept in a low-temperature environment while high strength is guaranteed.

The utility model provides a welding structure for explosive welding of a large-breadth composite tube plate, and relates to the technical field of explosive welding of metal composite plates. The lining plate is embedded in the blasting bed, and the upper surface of the lining plate is provided with a lining plate bearing surface; the lining plate bearing surface and the blasting bed bearing surface are coplanar and form a composite supporting surface together, and the composite supporting surface is used for supporting a base plate; the bottom of the foot pad is provided with a substrate abutting face used for abutting against the to-be-welded face of the substrate, and the top of the foot pad is provided with a covering plate supporting face used for supporting the covering plate. The explosive layer is arranged at the top of the covering plate, an exploder used for detonating is arranged in the explosive layer, the exploder is aligned with the geometric center of the covering plate, and the vertical projection of the exploder in the welding direction is overlapped with the lining plate; through a composite supporting surface formed by the lining plate pre-buried in the blasting bed and the blasting bed, the partition bearing of the blasting impact force is realized, and the deformation of the plate during the explosive welding of the large-breadth composite tube plate is reduced.

The invention discloses a coating process for improving the surface quality of an explosive welding metal composite plate, belongs to the technical field of metal composite material surface treatment, and solves the problems that in the prior art, the interface bonding force between a coating and a metal substrate is insufficient, so that peeling and cracking are easily caused, and the corrosion resistance and the mechanical property are poor. According to the process, the surface of a metal composite plate subjected to explosive welding is pretreated, a special coating agent and a curing agent are mixed according to a specific weight ratio to form a uniform composition, the surface of the plate is coated with the uniform composition, and a coating is formed through curing; the coating agent comprises epoxy resin, phosphorus-fluorine-boron miscellaneous ester, benzyl glycidyl ether, superfine mica powder, nano silicon dioxide, zinc phosphate and a plurality of auxiliaries and solvents, the phosphorus-fluorine-boron miscellaneous ester serves as a key component, interface adhesion can be enhanced through chemical bonding, corrosive media are blocked, and durability, hardness, wear resistance and impact resistance of a coating are improved; therefore, the surface quality and the service life of the composite board are obviously improved.

The invention provides an aluminum steel structure transition joint, a butt joint and a welding method of the aluminum steel structure transition joint. The welding method of the aluminum steel structure transition joint comprises the following steps that to-be-welded faces of a to-be-welded composite layer, a to-be-welded middle layer and a to-be-welded base layer are ground and polished; the composite layer is an aluminum alloy plate, the middle layer is an aluminum-manganese series aluminum alloy plate, and the base layer is a steel plate; the treated base layer and the treated middle layer are subjected to first-time explosive welding, and the aluminum alloy-steel composite plate is obtained; the aluminum alloy-steel composite plate is subjected to leveling and surface polishing treatment; and the aluminum alloy surface and the composite layer in the obtained aluminum alloy-steel composite plate are subjected to secondary explosive welding, and the welded composite plate is machined into the transition joint. According to the method, an aluminum-manganese series aluminum alloy plate serves as a middle layer, a composite plate is obtained through layered two-time explosive welding, a transition joint is prepared through a cold machining method, joint butt joint is achieved in combination with electromagnetic pulse welding, and transition connection between dissimilar metal aluminum alloy and steel is achieved.

This invention belongs to the field of composite pipe welding and manufacturing technology, specifically relating to a method for directly welding bimetallic composite plates to prepare composite pipes, the composite pipes themselves, and their applications. The method includes the following steps: 1) preparing a metallurgically bonded bimetallic composite plate using an explosive welding-rolling composite method; 2) milling a platform structure into the stainless steel cladding layer to ensure the exposure of the carbon steel base layer; subsequently, processing a bevel at the welding edge of the bimetallic composite plate, with a bevel angle of 30~80°; 3) cold-pressing the flat bimetallic composite plate into a circular tube shape, forming a weld gap at the welding edge; 4) performing transition layer welding, cladding layer welding, and base layer welding respectively; 5) performing solution treatment on the welded composite pipe to obtain the composite pipe. This invention can effectively improve the uniformity of mechanical properties between the weld zone and the base material zone and eliminate structural safety hazards, effectively ensuring that the overall service life of the composite pipe is more than doubled compared to existing technologies.

The present invention provides a method for detecting the bonding strength of a titanium-steel composite plate welding interface, which relates to the field of quality inspection technology. The method comprises: using a single crystal straight probe to scan from the steel substrate side of the composite plate, and determining whether there is a disconnection area on the interface by analyzing the amplitude relationship between the interface echo and the bottom surface echo; for composite plates determined to be fully bonded, defining a 180° arc scanning path on the composite plate surface with the explosive welding direction as the 0° reference axis, and dividing the arc path into four monitoring arc segments; within each monitoring arc segment, using an immersion ultrasonic detection device, focusing the probe on the steel-titanium bonding interface, scanning along the arc scanning path, and obtaining interface ripple C-scan imaging images of the four monitoring arc segments. The present invention realizes accurate detection of the titanium-steel composite plate welding interface from disconnection area screening to quantitative evaluation of bonding strength through ultrasonic detection and analysis, can effectively identify interface defects, and improve welding quality reliability.

The present application belongs to the technical field of explosive welding, especially a metal composite plate explosive welding device, comprising a base, a clamping mechanism, a explosive placement system, a multi-sensor array and a control unit. The clamping mechanism adopts a heavy frame structure, and the hydraulic locking cylinder is used to firmly fix the periphery of the base plate and the composite plate during the welding process, and the initial installation distance between the two is accurately controlled. The control method establishes a unified physical reference for the welding process, collects explosive pressure, temperature and vibration data in real time, calculates the welding quality index and deviation, compares the weighted warning coefficient with the threshold value to generate adjustment instructions, and adjusts the explosive quantity and detonation parameters adaptively. The present application solves the problems of inaccurate parameter control and unstable welding quality in existing explosive welding, and ensures the bonding strength and consistency of the welding interface through intelligent feedback control.