487 results about "Explosion welding" patented technology

A method for manufacturing a compound steel plate of stainless steel includes the following steps in turn: I, matching two stainless steel plates with a common carbon steel plate and carrying out fitting up according to the demands of a final finished product and rolling; II, welding carbon steel strips on the surrounding of the compound plate: welding the common carbon steel strips with a thickness of 6-8mm and a width of 60mm on the surrounding of the non-junction surface of the compound plate; III, polishing: using a sander to remove the impurities like oxide on the junction surface; IV, explosion welding: welding the compound plate of A surface on a basic plate firstly, and then welding the compound plate of B surface in an explosion way; V, fault detection: using an ultrasonic defectoscope to carry out fault detection; the area junction rate between the compound plate and the basic plate is not less than 99 percent; VI, carrying out defected weldseams on the surrounding fault; VII, carrying out hot rolling on the compound steel plate; feeding the compound steel plate into a hot milling roll to be rolled into a hot rolling compound steel bend with a thickness not more than 3mm; VIII, carrying out hot rolling, solid solution and acid cleaning on the steel plate and finally finishing the steel plate. The manufacture method of the invention can be used for manufacturing the compound steel plate of stainless steel with a total thickness of 0.8mm to 2mm.

The invention provides a vacuum hot-rolled composite method of a titanium alloy plate and a stainless steel plate, which relates to a composite method for the titanium alloy plate and the stainless steel plate. Aiming at the problems that intense mixing of liquid metal and high welding stress are generated during the melt welding of the titanium alloy plate and the stainless steel plate, the contradiction between the diffusion and the controlling of volume fraction of compounds in connection interface metals is boosted to ensure the connection during the vacuum diffusion welding and the explosion weld joint is difficult to be applied to high-temperature and corrosive temperature, the method is characterized in that the stainless steel plate (1) and the titanium alloy plate (2) are used; furthermore, a copper foil or aluminium foil (3) is used; the surfaces of the two plates are milled flatly and the copper foil or the aluminium foil (3) is laminated and fix between the two plates, so as form a specimen; the specimen is arranged in a vacuum loading chamber (5); when the vacuum degree in a vacuum heating furnace (6) is (1-3)*10<-3> Pa and the temperature is 600-1100 DEG C, the specimen is delivered into the vacuum heating furnace for heating and heat preservation, and then welded by a roller (7) and cooled. The method of the invention has small welding stress, can control the volume fraction of compounds in the metals with high hardness and large brittleness; furthermore, the weld joint can be applied to the high-temperature and corrosive environment.

The present invention discloses an explosion welding method with aluminum-steel composite materials; a double-layer aluminum plate (4) is arranged on a basic level steel plate (6) through a support (5); a buffer protecting layer is paved on the surface of the double-layer aluminum plate; an explosive (2) is placed on the surface of the buffer protecting layer in the way of stage gradient style, so that per unit area explosive capacity is stepped gradually decreased from the center of the double-layer aluminum plate to two ends; a large acreage of the aluminum - steel composite materials is gained through the explosion welding method; per unit area explosive capacity is stepped gradually decreased from the center of the double-layer aluminum plate to two ends; the material of the basic level steel plate is a carbon steel or a low alloy steel; the material of the double-layer aluminum plate is a pure aluminum or an aluminum alloy with less or equal to 0.1 percent of Mg. The explosion welding method of the present invention has the advantages of high intensity and equal strength in composite bonding, no excessive melting, delaminating, or non-compounding phenomenon at an interface, being capable of making thick double-layer aluminum plate composite materials through once explosion welding, convenient in production and higher in efficiency.

The invention relates to an explosive welding forming method of magnesium and aluminum alloy composite plates. The explosive welding is performed according to the performance requirements of the magnesium and aluminum alloy composite plates, ammonium nitrate fuel oil mixture is adopted, and long-distance instantaneous explosive form is performed on a ground sand base. The welding method is high in forming speed, welding line is firm and is good in metallographic structure compactness, the combined rate is up to 99.5%, the interfacial shear strength is 120MPa, on the premise of strict operation, the welding process is safe and reliable, and the method is reliable and effective in magnesium and aluminum alloy composite plate production.

The invention provides a production method for an ultralong thin titanium/steel compound plate, which comprises the following steps: firstly, correcting the shape of a multi-layer titanium plate and performing heat treatment; secondly, cleaning and polishing a basic-layer steel plate and the multi-layer titanium plate after the heat treatment; thirdly, explosively welding the basic-layer steel plate with the multi-layer titanium plate to prepare a compound plate; fourthly, leveling the compound plate and mechanically cutting to guarantee that the compound plate binding fraction gets to 100%; fifthly, relatively superposing and assembling the steel surfaces of two qualified compound plates with the same sizes, and welding to obtain a blank; sixthly, rolling the blank; and seventhly, leveling and machining to obtain the ultralong thin titanium/steel compound plate. The method provided by the invention is lower in production cost and high in production efficiency; and the method adopts a combination method of the explosive welding process and the superposing rolling process, so that the using performance of the compound plate can be guaranteed and the length and the thickness of the compound plate also can be guaranteed. Therefore, the qualified ultralong thin titanium/steel compound plate can be produced by using a general rolling process only.

The invention relates to an explosive welding process for super-long and super-wide composite boards, and provides a method which is convenient, economical and piratical, wherein an explosive is distributed in a three-section different-explosion-velocity manner and compacted at periphery; therefore, the explosive welding of super-long and super-wide TA2/Q345R is realized, the problems that the side of the composite board is not composited or the bond strength of part of the composite board is too low in the explosive welding process of the super-long and super-wide TA2/Q345R composite board are solved, and the requirement of our equipment manufacture industry on the super-long and super-wide TA2/Q345R composite board is satisfied.

A manufacturing method of a corrosion-resistant dual metal clad tube blank comprises the following steps: outer-layer molten metal is pumped into a pipe die for centrifugal pouring, the molten metal is cooled after pouring, and inner-layer molten metal is poured when internal surface temperature of the outer layer is cooled to be lower than 50-70 DEG C which is the melting point of the outer-layer molten metal; inner-layer molten metal is pumped into the pipe die for centrifugal pouring, the molten metal is cooled after pouring; cooling is stopped after the outer layer and the inner layer are completely solidified, at the moment, the inner layer and the outer layer achieve complete metallurgical bonding; wherein, the outer layer is made of X52 or X60 steel and the inner layer is made of 825 steel. A metallurgical bonding layer of a production tube obtained by carrying out extrusion or hot rolling on the tube blank manufactured by the method is several times or dozens of times as thick as a bonding layer of the dual metal tube obtained by the explosive welding process; the transition of the ingredients on the inner and outer layers is gentle, thus greatly relieving the interfacial stress between the inner layer and the outer layer, facilitating the inner layer and the outer layer not to be layered easily, improving the safety of the use of the production tube and prolonging the service life of the production tube.

The invention discloses an explosive welding method for a large-area lead-steel composite board, in which a base steel board and a composite lead board are adopted. The method comprises the following steps of: adding a high-strength metal board on the surface of the composite lead board, and bonding the composite lead board and the high-strength metal board together with adhesives; and proportioning special explosive as follows: 45-48 parts of expanded ammonium nitrate, 48-51 parts of sodium chloride and 4-6 parts of pearlite, ensuring a detonation velocity range of 1200m/s-1500m/s and adopting slop type explosive distribution at a far end. The method disclosed in the invention realizes the support of the lead board so that the explosive welding of the large-area lead-steel composite board can be implemented; and the method has the advantages of eliminating negative effects of surface burn and boundary effect on explosive composite, ensuring that the lead-steel composite board has the primary composite rate being higher than 98% and higher bond strength.

An explode welding repairing method which is hard to dilute metal compound board, firstly, the thickness of hard-diluting metal board is larger than the original board material by 0.5 to 1mm, the area of board material is larger than a defect zone by 20 to 60 mm2; secondly, proceed fine polishing to the compound board at the position under epair; thirdly, put rare metals on the surface under epair, the compound board under epair is made as the lower layer of base board; fourthly, the rare metal board and a placode under epair, the enlarged supporting gas between the two boards adopts edge supporting, the gap is of 7 to 10mm and laid in parallel; fifthly, the rare metal board surface after protecting is distributed with explode evenly, the protecting layer uses lubricate resin adding thinner, the thickness of the protecting layer equals to 0.5 to 1mm; sixthly, the size of the fire point is controlled below the diameter of 15mm; seventhly, after exploding compound, the invention is level to the main material after heat process, flattening and repairing and abrasion of the connection edge.

The invention discloses a method for preparing seamless thin multilayer titanium/steel composite plate and relates to a method for preparing the seamless titanium/steel composite plate with large specifications and a thin multilayer through a combined process of explosive welding plus hot rolling. The method is characterized in that after explosive cladding, a titanium plate and a steel plate form the composite plate through hot rolling. The method adopts a combined process of explosive welding plus hot rolling to prepare the seamless titanium/steel composite plate with the large specifications, an overall length over 10, 000mm and the thin multilayer, thereby not only ensuring the binding property and the specification requirements of the composite plate, but also meeting the demand on the seamless titanium/steel composite plate with the large specifications and the thin multilayer of large-scale pressure equipment.

The invention relates to an explosive welding method of an aluminum/titanium/steel three-layer composite material, belonging to the technical field of metal composite materials. The explosive welding method is characterized in that a multi-layer aluminum (4) and a multi-layer titanium (5) are arranged on a steel plate (6) through a metal strutting (1), explosives (3) are distributed on the surface of the multi-layer aluminum (4), and an aluminum/titanium/steel composite material (8) is obtained by first-time explosive welding; a multi-layer aluminum (7) is arranged on the aluminum/titanium/steel composite material (8) by the metal strutting (1), and the aluminum/titanium/steel three-layer composite material with heavy-section multi-layer aluminum is obtained by second-time explosive welding; materials of a base plate are plain carbon steel or low alloyed steel, the thickness of the multi-layer titanium (5) ranges from 1 mm to 2 mm, and the thickness of the multi-layer aluminum (4) can reach 25mm. The invention has the advantages of high combination strength of a composite interface, no melting, layering and compositing phenomenon on the composite interface, and one time explosive welding is carried out on three layers, thereby preventing explosive welding technique parameters from being difficult to control because the multi-layer titanium (5) is extreme thin.

An explosion welding method for metal tube liners in which a metal tube of smaller outside diameter is positioned coaxially within a metal tube of larger inside diameter with one or more shims inserted at opposed tube ends to form a uniform annular gap. The tubes are vertically positioned on a flat surface, and the smaller tube is filled with explosive material detonated from its top surface. The detonation initiates a uniform explosive front traveling down the smaller tube expanding the internal surface of the smaller tube with sufficient velocity to weld the tubes. A vacuum may be formed within the annular gap and/or gas(es) introduced therein to prevent build-up of excessive heat at the explosive front.

The present invention discloses a method for observing a metallographic structure on a titanium/steel explosion welding interface, which comprises the following steps: 1, machining a metallographic structure observation plane on the titanium/steel explosion welding interface; 2, grinding the metallographic structure observation plane; 3, carrying out pickling with HF solution; 4, carrying out mechanical polishing; 5, eroding titanium and polishing steel; and 6, carrying out observation. The method is easy to operate, the metallographic structure on the titanium/steel explosion welding interface can be observed clearly by adopting the method, and no special equipment is needed.

The invention discloses a manufacturing method of an aluminium-copper double metal composite weldment, which comprises the following steps: a composite aluminium plate (4) is supported layer by layer by a support (5) and is arranged on a base copper plate (6); a buffering protective layer (3) is stuck on a first layer of aluminium plate (4); explosives (2) are distributed on the surface of the buffering protective layer (3); the explosive load on a unit area is controlled according to the requirement of design strictly; the aluminium-copper double metal composite material with high quality is obtained by integrating explosion, welding and composition, the composite interface has high and uniform bonding strength; the interface does not have excessive melting and composite layering, does not lead the resistance of the interface to increase, can realize explosion and welding on a large area, is convenient to product and improves the efficiency.

The invention provides a preparation method of an ultra-thick titanium/steel composite tube plate with large area and high properties, which comprises the following steps: 1. adopting a TIG welding method to prepare a multi-layer titanium plate through split welding; 2. adopting an automatic submerged arc welding method to prepare a base-layer steel plate through the split welding; 3. carrying out the leveling treatment on the base-layer steel plate; 4. polishing the combination surface; 5. assembling the base-layer steel plate and the multi-layer titanium plate; 6. preparing the composite tube plate through explosive welding; and 7. carrying out the annealing heat treatment on the composite tube plate to relieve the stress and obtain the ultra-thick titanium/steel composite tube plate with large area and high properties through mechanical processing. The ultra-thick titanium/steel composite tube plate with large area and high properties prepared by the invention has the excellent strength, heat conducting property and welding property of the steel plate, and simultaneously has the corrosion-resistant property of titanium. The composite tube plate prepared by the invention has the combination rate and properties achieving the standard requirements, can be safely applied to the production and basically solves the limit of the composite tube plate dimension to the standards of large-sized equipment.

The invention introduces a method for producing an exploded/rolled big area titanium steel composite plate. The method including includes the steps of titanium plate splicing, nondestructive testing after welding, explosive welding, nondestructive testing after explosive welding, rolling, nondestructive testing after rolling, and tissue and performance detecting, wherein, when the titanium plate is not more than 7 mm in thickness, the titanium plate is welded by adopting plasma arc welding, thereby finishing the step for titanium plate splicing; when the titanium plate is more than 7 mm in thickness, performing backing weld by using plasma arc welding and then welding the cover surface by employing automatic argon tungsten-arc welding, thereby finishing the step for titanium plate splicing. The method capable of meeting the demands of users for the titanium steel composite plates with different sizes, is unlimited to supply sizes of titanium materials in the current market, less in welding workload, low in production cost and beautiful in welding seam formation; the joints with good toughness can bear the action of great impact of a detonation wave during the explosive welding process and repeated rolling during the rolling process; the heat affected zone of welding is small; and the welding seam is good in quality. By using the process, the problem of the composite layer titanium for the exploded/rolled big area titanium steel composite plate in which the joints are split after the composite plate is exploded and rolled, is solved successfully.

The invention provides a button cell and a manufacturing method thereof. The button cell comprises a package assembly and a battery roll core. In the actual application process, a battery cup and a battery cover play a protection role; a seal rubber ring plays a sealing and waterproofing function; besides, when a tab needs to be welded, the tab is positioned, and electric resistance welding operation is carried out on the battery cup and/ or the battery cover, so that the electric resistance welding is carried out on the contact portion between the tab in the center position of the battery roll core and the battery cup and/ or the battery cover to form a center welding layer, and the electric resistance welding is carried out on the contact portion between the tab at the edge position of the battery roll core and the battery cup and/ or the battery cover to form an edge welding layer; the center welding layer and the edge welding layer can prevent the phenomenon of "explosion welding"occurred in the tabs, thereby greatly improving welding stability of the tabs; and compared with a conventional laser welding mode, the provided welding mode is higher in welding safety factor, and there is no risk that the laser directly breaks down the battery cup or the battery cover.

The invention relates to an explosive welding method for a copper-aluminum composite material. An aluminum composite plate (4) is arranged on a copper substrate (6) in a parallel mode through a supporting object (5), a rubber buffering layer (3) is laid on the aluminum composite plate (4), rock ammonium nitrate explosive cloth number two is arranged on a rubber buffering layer (3), the copper substrate (6) is arranged on a rubber cushion layer (7), a medium-fine sand foundation (8) is located below the rubber cushion layer (7), and the copper-aluminum composite material is obtained through explosive welding. A copper-aluminum composite plate produced through the explosive welding method can achieve 100% welding composite rate, is evenly formed in a composite mode without the phenomena of layering, swelling, vortex and the like.

The invention discloses an explosive welding method for bimetal composite boards with special quality requirements. The explosive welding method includes preprocessing blanks; charging powder; and performing explosive welding. In a powder charging procedure, 'basin'-shaped powder charge bodies are arranged on shroud plates and extension plates, upper and lower surfaces of the powder charge bodies are parallel to the shroud plates and the extension plates, and powder charging quantities are acquired by computing according to a formula. The welded rate of the composite boards welded by the explosive welding method reaches 100%, the bonding strength of welded surfaces of the bimetal composite boards meet a bimetal solid-phase metallurgical bonding strength law, bonding interfaces of the bimetal composite boards are finely wavy and are excellent in quality, and accordingly the quality requirements of critical equipment of thermonuclear fusion power generation test reactors on the composite boards are met.

The present invention belongs to the field of explosion welding technology and provides one kind of explosion welding method for low melting point alloy plates. After one thin transition metal layer is set between the covering plate of low melting point metal and the base plate, once explosion welding is performed to manufacture composite low melting point metal plate. The present invention may be sued in manufacturing composite plate of Al, Mg, Pb, Sn and their alloy, and has the advantages of making thick composite low melting point alloy plate in once explosion, low cost, high production efficiency, raised upper explosion limit, increased welding parameter range and high finished product rate.

The invention discloses a layered aluminum copper composite plate and a preparation method thereof, which belong to the technical field of preparing composite plates. The layered aluminum copper composite plate is prepared by the preparation method comprising the following steps of: coating a pure copper layer on a pure aluminum substrate, wherein the pure aluminum substrate is a pure aluminum plate with the thickness of 5.0 to 10.0 mm, and the pure copper coating layer is a pure copper plate with the thickness of 1.0 to 2.0 mm; selecting the pure copper plate and the pure aluminum plate; polishing the surfaces to be compounded of the pure copper plate and the pure aluminum plate; assembling the well-polished pure copper plate and the pure aluminum plate, flatly spreading a prepared ammonium nitrate fuel oil explosive mixture on the upper surface of the pure copper plate, and performing explosive welding; performing annealing after the explosive welding; levelling the composite plate after the annealing; and examining the aluminum copper composite plate after levelling, and cutting out uncompounded or cracked parts on four edges of the composite plate to obtain the layered aluminum copper composite plate. Because the aluminum layer replaces part of the copper layer, compared with a copper plate with the same thickness, the aluminum copper composite plate has the characteristics of lighter specific weight and excellent electric conductivity of copper.

The invention discloses an explosive welding method of an SAF2507 composite steel plate. The method comprises the following steps of: leveling to enable the flatness of the steel plate to be less than 3mm/m; treating the composite material to ensure that the plate flatness of the SAF2507 alloy is less than 5mm/m; brushing and pairing: brushing the composite material protective agent on the SAF2507 alloy plate, and paring with the steel plate; and explosively compositing: placing the steel plate flatly on the explosive table, and arranging the SAF2507 alloy plate on the steel plate in parallel, arranging a V shaped support between the steel plate and the SAF2507 alloy plate, uniformly arranging the explosive on the outer surface of the SAF2507 alloy plate, detonating the explosive via the detonator, and tightly bonding the surface of the SAF2507 alloy plate and that of the steel plate together under the high brake pressure. The invention provides an SAF2507 super-duplex stainless steel plate with the higher quality and wider application range.

An armor that is used, for example, in multi-cell missile launchers is disclosed. In some embodiments, the armor includes three layers. The inner-most layer undergoes explosive welding when exposed to a pressure wave from an explosion. An intermediate layer in-elastically deforms when exposed to the explosion. The third and outer-most layer includes a plurality of elongated, pressurized tubes that contain fire retardant, among other chemicals. Silicone gel is interposed between the tubes.