110 results about "Explosive cladding" patented technology

To protect the collimator of a transferred plasma arc torch from premature failure due to corrosion, an anti-corrosive covering is applied on the exposed face surface and a portion of the inner exit bore of the collimator. The specification describes several methods for producing the collimator for a plasma torch having an anti-corrosive coating or cladding on the exposed surfaces thereof, including electroplating, electroless plating, flame spraying, plasma spraying, plasma transferred arc, hot isostatic pressing and explosive cladding.

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 multilayered steel armour consisting of the front-face ballistic-resistant armour layer (1) and the backing armour layer (2), which are fully metallurgically bonded by means of at least one joining metallic intermediate layer (3), for example, by casting, wide-area welding techniques, using technology of explosive cladding (high-velocity impact cladding), by roll welding or by a combination of the previous techniques. The joining metallic intermediate layer (3) between the front-face ballistic-resistant armour layer (1) and the backing armour layer (2) is made from the material featuring the face-centered cubic crystalline lattice (FCC lattice), in particular, from the nickel alloy containing maximally 98.0 wt % of nickel and/or from steel.

The invention discloses an explosion cladding and welding method of titanium-steel compound plate welding seams. The titanium plate used for cladding is firstly pressed into an arc-shaped titanium plate 3. The base plates of two pre-butt-jointed titanium-steel compound plates are processed into smooth arcs corresponding to the arc-shaped titanium plate 3. A groove is formed on the compound plates. The smooth arcs of the base plates, the groove of the compound plates and the arc-shaped titanium plate are grinded by abrasive paper or buffing wheel to remove the oxides on the surface of the metals and expose metallic luster. Then, the titanium-steel compound plate is arranged on a sand foundation 7, and the arc-shaped titanium plate is arranged over the smooth arcs of the base plate supported by a supporter 4. The height of the supporter is adjustable, ensuring that an arc-shaped welding seam 5 is formed between the smooth arc and the arc-shaped titanium plate. The explosive 2 is arranged on the upper surface of the arc-shaped titanium plate. Explosive charge quantity is determined by the area of explosion cladding unit. The explosive is ignited by 8# industrial electric detonator, ensuring that the arc-shaped titanium plate and the base plate are clad into an integrated body, and a complete welding titanium-steel compound plate with full penetration is gained. The welding seam has a smooth surface, is good-looking and corrosion resistance, and has a long service life.

The invention discloses a composting method of a dovetail groove metal plate clearance fit interface. The compositing method is realized through the explosive cladding method, the rolling method and the like. According to the method, after a base plate with dovetail grooves and a surface plate with dovetail grooves are in interference fit, the base plate and the surface plate are composited together through combination of a metallurgical bonding mode and a squeezing meshing mode of the dovetail grooves under the actions of energy of explosives or a rolling mechanism. Physical and chemical properties of metal sheets on the two sides of a dovetail groove combination interface are not changed, and large-area metal sheet composition can be conducted; the explosive charge for a unit of compositing area is small, and atmospheric pollution, noise pollution, explosion vibration and overpressure are reduced; during explosive welding of the metal sheets with the dovetail grooves, no boundary effect exists, the compositing effect on the periphery is good, and the lower limit and the upper limit of an explosive welding window are both increased. The compositing technology of the dovetail groove metal plate clearance fit interface can be applied to the fields such as chemical reaction containers and ships so as to meet the requirement for large-area metal composite plates.

The invention relates to an explosive welding method for a zirconium-steel-zirconium three layer pipe. An outer zirconium pipe in an outer zirconium pipe-steel pipe-inner zirconium pipe has the diameter of 60-505 mm and the thickness of 1-8 mm, and a steel pipe has the diameter of 55-500 mm and the thickness of 8-200 mm; the inner diameter of the steel pipe is 4-6 mm larger than the outer diameter of an inner zirconium pipe, and the inner diameter of the outer zirconium pipe is 4-6 mm larger than the outer diameter of the steel pipe; the inner diameter of the inner zirconium pipe is 10-15 mm larger than the maximal diameter of a buffer cone; the explosive welding method comprises the following steps of carrying out the surface treatment and alignment of a base pipe, treating the zirconium pipe; guaranteeing the straightness of the zirconium pipe; assembling which comprises the steps of matching, vertically mounting the inner zirconium pipe, the outer zirconium pipe and the steel pipe on a technological bottom plate and mounting a pressure reduction cone at the center inside the inner zirconium pipe; carrying out re-explosive-cladding which comprises the steps of horizontally placing the device assembled on an explosive table, additionally mounting a pipe-shaped outer frame at the outer part of an outer steel pipe, and uniformly placing explosives around the pipe-shaped outer frame and the buffer cone of the inner pipe and denotating through detonators placed at the top of the buffer cone; and firmly binding the surfaces of the zirconium pipe and the steel pipe under high braking pressure.

The invention discloses an explosive cladding structure of an aluminum-titanium steel composite board and a method for preparing the aluminum-titanium steel composite board. The explosive cladding structure of the aluminum-titanium steel composite board comprises a steel substrate board, a titanium board and an aluminum board; the steel substrate board is placed on the foundation; the titanium board is located above the steel substrate board; the aluminum board is located above the titanium board; a support sheet is used for separating between the steel substrate board and the titanium board, and between the titanium board and the aluminum board; an explosive layer is placed on the upper side of the aluminum board, the explosive layer comprises a main explosive and a high explosive velocity drug bar, and the explosive velocity of the high explosive velocity drug bar is higher than that of the main explosive; the main explosive is uniformly placed on the upper side of the aluminum board; the high explosive velocity drug bar is successively placed in the middle of the upper side of the aluminum board along the direction of the long edge; and the middle part of the explosive layer is connected to a detonator. The explosive cladding structure of the aluminum-titanium steel composite board has the advantages of high adhering rate, high bonding strength, and low cost, and has the characters of the good corrosion resistance and abrasive resistance of the aluminum materials and high strength of the steel board.

The invention relates to an explosive cladding process of metals. The process is characterized by comprising the following steps: substrate treatment, composite treatment, applying and pairing, explosive cladding, repair welding, heat treatment and post-treatment. The process can help clad NO8825 nickel-based alloy plates with general steel plates effectively so that the clad steel plates can have the required strength on the premise of owning all the advantages of the NO8825 nickel-based alloys, thus saving consumption of expensive metals. The clad steel plates have high welding quality, and can certainly remain stable in long-term use without sealing off.

The invention provides an explosive cladding method for a groove type hot melt interface of a metal plate and an explosive device. According to the method, grooves are formed in the surface of a metal base plate at first, the grooved interface is cleaned up, raw materials of a covering plate are melted in a high-temperature furnace, a part of melted liquid flows into groove cavities, under the thermal action of the high-temperature liquid and the mechanical action of the grooves, primary combining of the covering plate and the base plate is achieved, then the covering plate is further squeezed into the grooves through an explosive method, the base plate and the covering plate squeeze each other and are combined closely, and tight combining force is achieved on the interface of the two metal plates. According to the explosive cladding method and the explosive device, the amount of explosives in unit area is small, a honeycomb aluminum explosive loading structure is adopted, the explosive amount and the cladding time can be saved, and meanwhile, atmospheric pollution, noise pollution, vibration and overpressure are reduced.

The invention provides a vacuum melting and slab casting method of a titanium-aluminum alloy, wherein titanium and aluminum metal raw materials are formed into a rectangular slab by a method of multiple vacuum consumable melting and centrifugal casting; the melt is solidified into an ingot in a metal composite material crucible; the crucible is fabricated from a composite material of a special metal and pure copper formed after explosive cladding; the outer layer is cooled by pure copper liquid so that a slow cooling speed is obtained during the melting of the TiAl alloy.

The invention discloses a method for producing a steel composite Ti (titanium) plate for chimney. The method for producing the steel composite Ti plate for the chimney includes the steps of making steel billets through explosive cladding of Ti and Q235 or Q345 substrates, and then making he steel billets into the steel composite Ti plate for the chimney by heating, high-pressure phosphorus removal, rolling and straightening, wherein the thickness of the steel billets is 58-100 millimeters, the thickness of Ti 5-7 millimeters and the thickness of the Ti composite plate for the chimney 10-20 millimeters. The method for producing the steel composite Ti plate for the chimney has the advantages that the surface quality of the steel composite Ti plate for the chimney meets the requirements of GB/T 14977 Class B, and the steel plate is zero-grinding delivery; Ti plate thickness precision control is high, and when thickness of the Ti plate h is no more than 15 millimeters, same plate difference is controlled within 0.3 millimeter, and when the thickness of the Ti plate h is more than 15 millimeters and no more than 20 millimeters, same plate difference is controlled with 0.4 millimeter; after the Ti plate is rolled, the plate is flat, the straightness of the same meets the requirements of the European standard of 6 millimeters to 2 meters, and no cracking at the head and tail exists, which fully meets the needs of users.

The invention discloses a preparation method for a component with a Ti/Ti*Al y/Ti multilayer structure and belongs to the technical field of the preparation and forming of metal-based composite materials. The preparation method includes: firstly, using an explosive cladding method to prepare titanium/aluminum multilayer composite material, rolling, leveling, annealing and carrying out heat treatment; secondly, molding the metal composite laminate through a plastic forming method to obtain a component with complex shape; thirdly, putting the component in a die, pressurizing the surface of the component by means of inert gas, heating the component to react and consume the aluminum layer completely to generate a titanium-aluminum intermetallic compound layer, and obtaining the complex component with Ti/Ti*Al y/Ti multilayer structure finally. The preparation method for the component with the Ti/Ti*Al y/Ti multilayer structure overcomes the disadvantage that the traditional method is difficult to prepare the titanium-aluminum intermetallic compound component with complex structure and expands the application field of the titanium-aluminum intermetallic compound; the preparation cost is low, the production efficiency is high, and the engineering application value is very high.

The invention provides an explosive welding method for an extra-thick plate. The explosive welding method for the extra-thick plate is applied to a steel plate with the thickness of a coating plate being 25-30 mm and the thickness of a substrate being 30-115 mm. The explosive welding method for the extra-thick plate is characterized by comprising the following steps that a coating prefabricated crack is formed; detonating points are prefabricated; the coating plate is arranged on the upper portion, the steel plate serves as the substrate on the lower portion, the coating plate and the substrate are installed and arranged in parallel through supporting pads at four corners at the edges, and the height of a supporting gap is 1.2-1.8 times the thickness of the coating plate; the coating prefabricated crack is aligned with the edge of the substrate; the requirement for even application and distribution of high voltage pulse loads of the whole plate is met; emulsion explosives are evenly arranged on the surface of the coating plate, the explosion speed is 2200-3200 mm/s, a plane wave generator is arranged along the prefabricated detonating points, the explosion speed is 4000-4500 mm/s, and an energy-gathered igniting primer is located in the middle of the edge of the coating plate; and after explosive cladding, through heat treatment and flattening, by means of explosive cladding primary forming, the attaching rate reaches 100%, and the minimum shear strength [tau]b>=210 Mpa.

The invention relates to an explosive cladding process of metals. The process is characterized by comprising the following steps: substrate treatment, composite treatment, applying and pairing, explosive cladding, repair welding, heat treatment and post-treatment. The process can help clad NO6059 nickel-based alloy plates with general steel plates effectively so that the clad steel plates can have the required strength on the premise of owning all the advantages of the NO6059 nickel-based alloys, thus saving consumption of expensive metals. The clad steel plates have high welding quality, and can certainly remain stable in long-term use without sealing off.

The invention discloses a novel metal compounding process. The process comprises the following steps of: (1) performing surface roughening treatment to ensure that the surfaces of bonding layers are dissolved and roughened; (2) preparing a complex, namely adding an interlayer metal material with low melting point and high electric conductivity between substrate-layer metal and composite-layer metal so as to ensure that the interlayer metal material is permeated between the substrate-layer metal and the composite-layer metal to form metallurgical bonding; and (3) rolling the complex on a roller mill so as to closely bond the substrate-layer metal and the composite-layer metal. According to the process, an explosive cladding link is eliminated in a production environment, so that the harm of explosive cladding to the environment is reduced; the production cost is saved, and the production cycle is shortened; and moreover, the welding and rolling of all bonding surfaces are combined, so that the bonding compactness is relatively high.

The invention relates to an explosive cladding process of metals. The process is characterized by comprising the following steps: substrate treatment, composite treatment, applying and pairing, explosive cladding, repair welding, heat treatment and post-treatment. The process can help clad 904L super austenitic stainless steel plates with general steel plates effectively so that the clad steel plates can have the required strength on the premise of owning all the advantages of the 904L super austenitic stainless steel, thus saving consumption of expensive metals. The clad steel plates have high welding quality, and can certainly remain stable in long-term use without sealing off.

The invention discloses a preparation method of a large-area all-joint-rate zirconium/titanium/steel explosive clad plate. A current general explosive clad process with titanium metal as a transitionlayer is adopted, a detonating point position is selected before explosive cladding, one titanium layer with the diameter being 280-320 mm and the thickness being 2 mm is subjected to explosive cladding on a base board to serve as the transition layer, then the transition layer serves as a detonating point, large-area zirconium and titanium one-time continuous welding is conducted, the plate is made to fit in all area, the smallest shearing strength tau b is greater than or equal to 137.9 Mpa, and the large-area all-joint explosive cladding welding is achieved accordingly. The method can produce the large-area zirconium and steel clad plate with the area being 6-15 m<2> and the joint rate being 100%, domestication of the large-area zirconium and steel clad plate is achieved, and the requirement of chemical industry development in China is met.

The invention relates to an explosive welding method for hard and brittle materials, and belongs to the technical field of material processing. The technical problem to be solved by the invention is to provide an explosive welding method for a hard and brittle material, which can obviously reduce cracks. The explosive welding method for the hard and brittle material comprises the following steps: a, selecting a compound plate and a base plate according to needs, then laying the compound plate on the top of the base plate, and arranging a plurality of supporting columns between the base plate and the compound plate; b, laying a water layer on the upper surface of the compound plate laid on the base plate in the step a, then placing an explosive frame on the top of the compound plate covered with the water layer, and then evenly laying explosive for explosive cladding in the explosive frame, wherein the laying area of the explosive for explosive cladding is not smaller than the surface area of a substrate; and c, detonating to obtain the explosive composite board. The composite board obtained through the method is high in binding rate and binding strength, uniform and consistent in performance and good in board shape.

The invention discloses an explosive cladding method used for a transition base plate of a helicopter deck of a drilling platform. An explosive welding formation method of a composite plate includingan aluminum plate, a titanium plate and a steel plate comprises the following steps that first, the surface of the aluminum plate, the surface of the titanium plate and the surface of the steel plateare cleaned; second, the aluminum plate is used as a first layer in contact with a corrosive medium, the titanium plate is used as a second layer used for transition, and the steel plate is used as athird layer for bearing a load; third, a rock emulsion explosive 1# with the detonation velocity equal to or higher than 2000mm/s is continuously laid on the surface of the aluminum plate, a detonation groove with the width of 20mm is laid on the rock emulsion explosive 1#, and an ammonium oil explosive having the detonation velocity equal to or higher than 2600mm/s is continuously laid in the detonation groove; and fourth, an initiation point is arranged at the center of the aluminum plate, and a detonator is arranged on the initiation point. By adoption of the explosive cladding method, therequirements for the cladding joint rate, the shearing strength and the tensile strength of large-area aluminum plate, titanium plate and steel plate explosion for development of the well-drilling petroleum industry can be met.

The invention discloses a high corrosion-resistant steel-aluminum composite material for ships and warships and a preparation method thereof. A base plate of the composite material is super austeniticstainless steel, and a composite plate of the composite material is a 6061 aluminum alloy. The preparation method is an explosive welding method. By way of three layers and two times, the preparationmethod comprises the following steps of performing explosive cladding on a transitional layer pure titanium plate and the substrate super austenitic stainless steel first and performing explosive cladding with the composite material 6061 aluminum alloy. The preparation method aims to obtain a steel-aluminum composite material, the cladding rate of which is greater than 99% after explosive weldingtwice by normalizing the dimensions of the composite plate, the transitional layer and the base plate and the dosage of an explosive in explosion twice. Meanwhile, in order to save the explosive andreduce the detonation velocity, quartz sand is added into an emulsion explosive in a ratio of 1: 1. The steel-aluminum composite material prepared by the preparation method disclosed by the inventionhas the characteristics of being high in strength, high in corrosion resistance, light and the like, and has a wide application prospect in military equipment such as ships and warships.