155 results about "Explosion welding" patented technology

The invention discloses an explosive welding method for preparing a super-thick large-area composite plate based on a nickel-based alloy plate. A steel plate serves as a base plate, a plurality of supporting blocks are laid, a nickel alloy plate is placed on the supporting blocks, then powdery emulsion explosive is laid, a detonator is placed, and finally the super-thick large-area nickel-based alloy composite plate is prepared after explosive cladding and detection are qualified. According to the explosive welding method for preparing the super-thick and large-area composite board based on the nickel-based alloy board, explosive cladding of the super-thick and large-area nickel-based alloy composite board is achieved, the fitting rate, the shear strength and other performance of the composite board can meet the requirements, and the mechanical performance and the corrosion resistance can meet the requirements of development of the industries such as equipment manufacturing and chemical engineering.

The invention discloses an anti-radiation aluminum-based layered composite board and an explosive welding method thereof, and belongs to the technical field of metal material welding. According to the method, aluminum or aluminum alloy serves as a base plate, tantalum or tantalum alloy serves as a compound plate, a titanium / titanium alloy middle transition layer is introduced, direct impact of explosive detonation on the compound plate is avoided through an aluminum protection plate, a powdery emulsion explosive is combined with an inert diluent to regulate and control energy parameters, and gaps between plates are accurately set based on the explosive welding window theory; and one-time forming metallurgical bonding of multiple layers of heterogeneous materials is achieved. The density of the obtained composite board is reduced by 40% compared with that of a traditional lead protection layer, and the composite board has the characteristics of radiation resistance, light weight, high strength and corrosion resistance and is suitable for manufacturing of spacecraft radiation protection layers and other deep space equipment.

The invention discloses a preparation method of a CoCrNi medium-entropy alloy and Q235B steel explosive welding composite board, which comprises the following steps of: annealing a CoCrNi medium-entropy alloy board, sequentially laying sandy soil, an anvil, a Q235B hot-rolled steel plate, a support column, a medium-entropy alloy board, kraft paper and explosive from bottom to top on an explosion field, and performing explosive welding to obtain the CoCrNi medium-entropy alloy and Q235B steel explosive welding composite board. The detonation velocity of the explosive ranges from 2500 m / s to 3000 m / s, and the brisance of the explosive ranges from 18 mm to 22 mm. According to the method, metallurgical bonding of the CoCrNi medium entropy alloy and the Q235B steel plate is achieved, the interface bonding rate of the obtained composite plate is larger than 99.2%, the yield strength is larger than 420 MPa, the tensile strength is larger than 500 MPa, the percentage elongation after fracture is larger than 35%, and the interface shear strength is larger than 200 MPa. The method is simple in process and suitable for industrial production.

The invention discloses a process for preparing a high-strength and high-toughness metal material with a multi-scale gradient composite structure through explosive processing, and relates to the field of high-strength and high-toughness metal material processes, the process comprises the following steps: 1, preparing a sand base, a base plate, a cover plate and an explosive, and polishing the outer surfaces of the base plate and the cover plate; the supporting object is placed at the top end of the base plate, the covering plate is placed at the top end of the supporting object, the explosive is placed on the covering plate, and the composite plate with a good metallurgical bonding interface can still be prepared by adjusting the detonation velocity of the explosive and the interval between the plates under the conditions that the tensile strength of the base plate of the welding plate reaches up to 1.4 GPa and the fracture strain of the covering plate is higher than 25%. In addition, by increasing the detonation velocity, the composite plate material is subjected to surface hardening, a grain size gradient layer is generated on the surface of the material, the explosive hardening and explosive welding machining processes are optimized, and meanwhile one-time forming of machining of the high-strength multi-scale gradient structure composite metal plate is achieved.

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 invention provides a method for preparing a honeycomb sandwich structure based on laser collaborative explosive welding, and belongs to the technical field of explosive welding. The method comprises the following steps: carrying out laser pretreatment on the surface of a honeycomb core to form a periodically distributed micron-sized pit array; submicron-order holes are constructed in the micron-order pit array based on a nanoimprint lithography method; covering the surface of the plane material with an energetic material layer, and carrying out explosive welding on the plane material and the pretreated honeycomb core by utilizing shock waves generated after the energetic material layer is detonated to obtain a honeycomb sandwich structure; the laser pretreatment adopts femtosecond laser treatment, the power density is 106W / cm < 2 >-107W / cm < 2 >, the pulse width is 100fs-500fs, and the distance between scanning paths is 10mu m-50mu m. According to the method, a metallurgical bonding layer and a residual compressive stress field are formed on the connection interface of the honeycomb core and the plane material through the synergistic effect of laser pretreatment, nanoimprint and explosive welding, crack propagation is inhibited, the fatigue life of a joint is prolonged, and thermal damage is reduced.

The invention provides a uniformity control method for explosive welding, and relates to the technical field of explosive welding. Determining whether the substrate layer and the composite layer are locally welded or not, and outputting a local welding area if the substrate layer and the composite layer are locally welded; performing heat conduction simulation analysis on the plurality of heat guide partitions on the local welding area to obtain a plurality of marked heat guide partitions; inputting the plurality of identified heat guide partitions into a welding uniformity control model, and outputting a control parameter group; and controlling the explosive welding device to perform explosive welding operation according to the control parameter group. The technical problem that the bonding strength of the welding interface is affected due to non-uniform heat distribution of the welding interface caused by lack of independent adjustment means for heat distribution of different welding areas in the prior art is solved, and the technical effects of improving the uniformity and the bonding strength of the welding interface and further improving the overall welding quality are achieved.

The invention belongs to a preparation method of a metal composite plate, and provides a composite plate with a multi-layer heterogeneous interface and a preparation method of the composite plate in order to solve the problems that according to an existing method for introducing heterogeneous distribution into a metal material, introduction is limited to partial areas of the surface layer of the material, cost is high, and the introduction form is single. And a multi-layer heterogeneous structure with component gradient isomerism, grain size isomerism and macroscopic performance isomerism is formed at the interface of the low-alloy element alloy plate and the corresponding aging strengthening type high-alloy element alloy composite plate and in adjacent areas on the two sides of the low-alloy element alloy plate and the corresponding aging strengthening type high-alloy element alloy composite plate. The obtained initial composite plate is heated, solute atoms are promoted to diffuse towards a low-alloy-element alloy plate area under the driving effect of a large concentration gradient near an interface, component gradient isomerism is directly formed, then the composite plate is subjected to cold deformation in the welding direction, high-temperature recrystallization heat treatment is conducted, and the composite plate is obtained. And the pinning effects of the solute atoms distributed according to the gradient on the crystal grains are also differently distributed in space, so that the crystal grain size isomerism is formed.

The invention provides a preparation method of a CoCrNi medium-entropy alloy / 316L stainless steel composite sheet, and belongs to the field of metal matrix composite material forming. The preparation method comprises the following steps: preparing the CoCrNi medium-entropy alloy / 316L stainless steel composite thick plate by adopting an explosive welding method; cutting a blank with good interface bonding from the composite thick plate; then multi-fire and multi-pass hot rolling is carried out; performing multi-pass cold rolling on the hot-rolled plate after annealing; and stress relief annealing is conducted after cold rolling, and the medium-entropy alloy / stainless steel composite sheet is obtained after air cooling. The CoCrNi medium-entropy alloy / 316L stainless steel composite sheet obtained by the method is uniform in thickness, flat and straight in joint surface, excellent in mechanical property, simple in production process and suitable for industrial production.

The invention relates to the technical field of explosive welding methods for composite plates, in particular to an explosive welding compounding method for a silver-steel composite plate. The method comprises the following steps that firstly, the surfaces of a silver plate and a steel plate are subjected to polishing treatment and film pasting protection; 2, a novel explosive is adopted, and explosive parameters are determined, specifically, the detonation velocity ranges from 1700 m / s to 1800 m / s, the brisance ranges from 6.5 mm to 6.8 mm, and the unit dosage ranges from 12 kg / m < 2 > to 15 kg / m < 2 >; and the optimal explosive welding distance is determined, wherein the height of the distance between the silver plate and the steel plate is 4-8 mm. According to the prepared silver-steel composite plate, effective metallurgical bonding of the silver plate and the steel plate is achieved, the bonding strength is far higher than that of other composite methods such as explosive welding, the defects of breakdown, wrinkling, tearing, jet flow accumulation and the like generated by a conventional welding method are effectively overcome, and meanwhile the phenomenon that the mechanical property does not reach the standard is avoided. Compared with other composite methods, the explosive welding process has the advantages that common calcium carbonate and bran are added and mixed with the explosive, low detonation velocity and appropriate brisance are obtained, the content of the explosive is reduced, and the cost is low.

The invention relates to the technical field of image processing, in particular to a composite board explosive welding defect detection method based on an X-ray image, which comprises the following steps: acquiring an X-ray image of a composite board welding seam as a target image; and calculating a lead word tendency index of each pixel point in the target image, calculating a welding seam tendency index of the pixel point based on the lead word tendency index of the pixel point and the gray value of the pixel point, and calculating an input scale of each pixel point under each basic scale under a multi-scale Retinex algorithm by using the welding seam tendency index. According to the method, the target image is processed through the self-adaptive scale, so that the features of the welding seam area in the target image can be enhanced more effectively, meanwhile, the areas outside the welding seam are subjected to feature suppression, the influence of the areas outside the welding seam in the target image on subsequent defect detection is reduced, and the detection accuracy is improved. Therefore, the detection accuracy of the explosion welding defect of the composite board is improved.

The invention relates to the technical field of dissimilar metal composite material manufacturing, in particular to a preparation method of a dissimilar metal connecting material for ship engineering, which comprises the following steps: S1, sequentially placing an isolation support plate, a first support block and a base plate on an explosion foundation; s2, sealing along the peripheries of the substrate and the isolation support plate by using a sealing material; s3, a second supporting block of the metal net frame is placed on the surface of the base plate; s4, the compound plate is placed on a second supporting block; s5, explosive is laid on the upper surface of the compound plate; s6, water is injected from a water injection opening; s7, inserting a detonator into the explosive; and S8, detonating the detonator and detonating the explosive to form the explosive welding material. Through the cylindrical mesh-shaped supporting piece and overwater explosive welding, the production length of a product is increased, the shearing performance of a far-end interface is greatly improved, the influence of interface performance of different areas caused by non-uniform basic virtuality and reality is reduced, and the problems of poor long-distance combination and consistency of performance of all the areas of the product in explosive welding are solved.

The invention relates to the field of explosive welding layered metal composite materials, and provides a dust-removing and environment-friendly explosive welding method which comprises the following steps: manufacturing a water-sand foundation: placing an explosive welding device on the water-sand foundation; laying a water bag and a detonating cord on the periphery of the explosive welding device, and finally detonating the explosive welding device and the detonating cord at the same time to complete explosive welding of the layered metal composite material. According to the dust-removing and environment-friendly explosive welding method, the water-sand foundation serves as the explosive foundation, dust formation during explosive welding can be reduced from the source, and the interface bonding performance of the layered metal composite material is improved; the water bags are distributed around the explosive welding device, the detonating cord is detonated to explode to cause atomization of the water bags, the water bags make contact with dust generated by explosive welding, and the effect of rapid dust removal is achieved. The two dust removal methods act together, operation is easy, the explosive distribution state does not need to be changed, and the welding quality is not affected; and the dust removal effect is also greatly improved.

The utility model discloses a welding device for preparing a long copper-steel composite pipe rod by utilizing a vacuum environment, which relates to the technical field of metal composite rod processing and comprises a base pipe, a composite pipe and a pvc (polyvinyl chloride) pipe which are arranged at intervals from inside to outside and are coaxially arranged. Bases used for sealing the base pipe and the composite pipe so as to vacuumize a gap between the base pipe and the composite pipe are arranged at the tops and the bottoms of the base pipe and the composite pipe, and the bases are connected with the composite pipe in a welded mode; the utility model has the beneficial effects that the base is arranged, so that the base pipe and the composite pipe can be quickly fixed and positioned, and after the composite pipe is welded with the base, a sealed environment is formed between the composite pipe and the base pipe, so that vacuumizing is facilitated; air in the gaps is effectively emptied, the problem of local defects of the composite bar caused by the fact that an air layer is not emptied in the production process is avoided, and the high-quality and longer copper-steel composite bar can be prepared through the explosive welding device.

The invention provides a finite element modeling method for simulating nickel-copper-steel explosive welding, and relates to the technical field of computer simulation. A three-dimensional model is established, material characteristics and initial conditions are set, and the explosive welding process is simulated by combining life and death unit functions with welding parameters; a unit is refined by combining a strain gradient and a temperature gradient on the basis of an adaptive refining algorithm, grid control point variables are mapped to a next time period on the basis of a Lagrange interpolation method, and change curves of temperature, pressure and strain along with time and a temperature field, a pressure field and a strain field at each moment are output, so that modeling is realized.

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.

The present invention provides a method for preparing a honeycomb sandwich structure based on laser-assisted explosive welding, which belongs to the field of explosive welding technology. The method comprises: performing laser pretreatment on the surface of the honeycomb core to form a periodically distributed micron-scale pit array; constructing submicron-scale holes inside the micron-scale pit array based on nanoimprinting; applying an energetic material layer to the surface of the surface material, and utilizing the shock wave generated by the detonation of the energetic material layer to explosively weld the surface material and the pretreated honeycomb core to obtain a honeycomb sandwich structure; laser pretreatment uses femtosecond laser processing with a power density of 10 6 W / cm 2 ~10 7 W / cm 2 The pulse width is 100fs to 500fs, and the scanning path spacing is 10μm to 50μm. This invention utilizes the synergistic effects of laser pretreatment, nanoimprinting, and explosive welding to form a metallurgical bonding layer and residual compressive stress field at the interface between the honeycomb core and the surface material, inhibiting crack propagation, improving joint fatigue life, and reducing thermal damage.

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 relates to an anode guide rod group which comprises anode guide rods, a steel claw cross beam, steel claw heads, a connecting structure and a steel-aluminum explosive welding block, the connecting structure is located in the lateral direction of the anode guide rod and comprises a plurality of sets of connecting pieces, each connecting piece comprises a steel-aluminum composite piece and an aluminum connecting plate which are connected with each other, each steel-aluminum composite piece comprises a steel piece and an aluminum piece, one end of each aluminum connecting plate is welded to the corresponding aluminum piece, and the other end of each aluminum connecting plate is welded to the anode guide rod. The steel sheet is welded with the steel claw cross beam; the steel-aluminum explosive welding block comprises a steel block and an aluminum block, the steel block is welded with the steel claw cross beam, and the anode guide rod is welded with the aluminum block.

The invention relates to the technical field of metal composite plate explosive welding, in particular to a metal composite plate explosive welding device and method for reducing interface defects, the device is used for maintaining a uniform distance between a base plate and a compound plate, and the device comprises a rigid structure, a fixing block, a reinforcing connecting piece and a support; the compound plate and the rigid structure form an integrated structure through the fixing block and the reinforced connecting piece, and the integrated structure is used for fixing the compound plate and keeping the horizontal plane of the compound plate; the supports are arranged on the periphery of the base plate, and the ends, away from the base plate, of the supports are connected with the compound plate and used for supporting the compound plate and limiting the distance between the base plate and the compound plate. The compound plate is fixed and kept in a horizontal plane through the rigid structure, the gap between the base plate and the compound plate can be kept to meet the design requirement only by placing the supports on the periphery of the base plate, and therefore the large-area explosive metal compound plate with the unsupported bonding interface is obtained.

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 discloses a nuclear power station cable assembly and a manufacturing process thereof, the nuclear power station cable assembly is used for adapting to a fission chamber detector, the nuclear power station cable assembly comprises a cable body, a first connector and a second connector, and the cable body comprises a core wire, an insulating layer and a shielding shell which are sequentially arranged from inside to outside; the first connector is arranged at one end of the cable body and used for being connected with a fission chamber detector, the first connector comprises a male plug and an explosive welding head, the male plug and the cable body are welded together through the explosive welding head, and the male plug is electrically connected with the core wire; the second connector is arranged at the other end, far away from the first connector, of the cable body, and the second connector and the cable body are welded together; the second connector comprises a coaxial connector, an inner conductor is arranged in the coaxial connector, and the inner conductor is electrically connected with the core wire. The nuclear power station cable assembly provided by the invention has excellent anti-electromagnetic interference performance while being well matched with the fission chamber detector, and can ensure stable transmission of measurement signals of the fission chamber detector.

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.