15 results about "Double plating" patented technology

The invention belongs to the technical field of metal material surface treatment, and discloses a production process of a weldable electroplated chromium plate. According to the process, cluster-shaped peak morphology is transferred on the surface of a cold-rolled steel coil through a laser texturing roller, and staged double-layer chromium electroplating is combined, specifically, a discontinuous chromium layer is formed on the top of a micro convex peak through first-time high-current pulse electroplating, and local iron leakage points are reserved; the second low current direct current plating covers an ultrathin continuous chromium film to maintain macro passivation. According to the invention, a composite functional structure with both macroscopic passivation integrity and microcosmic conductive selectivity is constructed on the surface of chromium-plated iron by accurately controlling the microstructure of the surface of a base material and double-layer chromium plating process parameters, so that the technical bottleneck of the chromium-plated plate in resistance welding application is effectively solved, collaborative optimization of weldability and corrosion resistance is realized, and the application range of the chromium-plated plate in resistance welding is widened. And a reliable technical path is provided for comprehensive replacement of chromium-plated iron in the field of metal packaging.

The application discloses a composite coating with inert plating layer for reducing hot forming crack of high-strength steel, which is in a double-layer composite form and is obtained by pre-plating a layer of plating layer on the surface of high-strength steel, wherein the pre-plating layer contains at least one of B, Al, Cr, Cu, Mo and W elements, and the elements have positive mixing enthalpy with Zn element, that is, inert interaction with liquid Zn atoms. A conventional Zn plating layer is plated on the pre-plating layer. The thickness of each plating layer in the double-layer plating layer is 1-30 microns. The plating layer for reducing the hot forming crack tendency of high-strength steel combines chemical composition, element interaction and other factors, so that the liquid Zn atoms which are easy to penetrate along the grain boundary in the hot forming process are repelled by the plating component atoms in the pre-plating layer, the penetration of the liquid Zn atoms into the grain boundary of the steel base body is prevented, and the formation of the hot forming crack is reduced or even avoided. Through reasonable regulation and control of the element ratio of the plating layer, the purpose of effectively reducing the crack tendency of different types of high-strength steel in the hot forming and resistance spot welding processes can be achieved.

The invention discloses a self-repairing galvanized aluminum-magnesium steel plate coating alloy design method and a hot dipping process, and relates to the technical field of alloy design, the method comprises the following steps: calculating crystallization pressure safety redundancy according to the maximum chlorine salt concentration and thermodynamic temperature of a working state area; calculating the comprehensive interface energy of the double-layer plating layer structure of the to-be-plated steel strip based on the crystallization pressure safety redundancy; quantifying a crack tip passivation factor of an interface crack tip area in the metallurgical bonding interface, and calculating corrected interface energy of the metallurgical bonding interface based on the crack tip passivation factor and the comprehensive interface energy; and salt elimination micro-grooves are formed in the surface of the to-be-plated steel strip, qualification judgment is conducted on the to-be-plated steel strip based on the corrected interface energy, and the micro-groove steel strip is obtained. The salt crystal splitting resistance of the plating layer is improved, and the corrosion resistance service life of the plating layer is prolonged.

The present application relates to a kind of double plating modified diamond heat-conducting composite material, preparation method and application, steps include first pretreatment diamond particles;First surface treatment process is executed to pretreated diamond particles, and the metal carbide plating layer is formed on the surface of the diamond particles;Second surface treatment process is executed to the diamond particles with metal carbide plating layer, and the electroplated metal layer is formed on the surface of the metal carbide plating layer of diamond particles;Subzone preparation mixed powder and obtain subzone powder with electroplated metal layer of diamond particles are mixed with each subzone powder according to different volume, according to the order of filling layer filling, after filling, sintering is formed, to make modified diamond heat-conducting composite material.The present application generates nanoscale metal carbide plating layer TiC layer and Cr3C2 layer by magnetron sputtering on the surface of diamond, which forms covalent bond with diamond, and the interface bonding strength is significantly improved compared with uncoated layer.

The application discloses a surface protection method of a Nd-Fe-B double-plating layer, which comprises the following steps: after a Nd-Fe-B part is subjected to mechanical treatment of surface physical defects and surface oil removal treatment, the Nd-Fe-B part is subjected to ultrasonic treatment in an acid pickling solution; then, a copper layer is deposited on the surface of the Nd-Fe-B part by a physical gas deposition method or a magnetron sputtering method, wherein part of copper atoms diffuse into a surface layer of the Nd-Fe-B part and are distributed in grain boundaries; and a nickel layer is electroplated on the copper layer deposited on the surface of the Nd-Fe-B part. The application optimizes boundary microstructure by depositing the copper layer, and on the other hand, the double-plating layer is preferentially selected to replace a three-layer plating layer structure, so that magnetic shielding generated by the plating layer is reduced; and the new surface protection with high corrosion resistance is realized, which does not affect surface adhesion and greatly reduces loss of magnetic performance or even does not cause loss of magnetic performance.

The utility model belongs to the technical field of electrolysis equipment, and particularly relates to a tungsten filament double-layer electrolytic plating device which comprises a storage tank and two electrolytic baths arranged up and down, and a circulating pipeline is arranged between the storage tank and the electrolytic baths; two first partition plates and two second partition plates are arranged at the two ends of the electrolytic bath, strip-shaped holes are formed in the first partition plates and the second partition plates, a plurality of trays are arranged between the two second partition plates, and plating blocks are arranged on the trays; winding rollers are arranged at the two ends of the electrolytic bath, and a tungsten filament penetrating through the electrolytic bath is wound between the two winding rollers. According to the utility model, the upper and lower double-layer plating tanks are arranged, the winding rollers are arranged at the two ends of the aqueduct, and a tungsten filament passes through the two plating tanks for multiple times after passing through the winding rollers, so that the volume of electroplating equipment is effectively reduced, the volume of plating liquid for plating is reduced, the cost is reduced, and the plating efficiency is improved.

The invention relates to the technical field of alloy steel wires, in particular to a preparation method of a special super-strong alloy steel wire, which comprises the following steps: polishing, alkali washing degreasing, acid washing rust removal and water washing are performed on the alloy steel wire to obtain a pretreated alloy steel wire; the pretreated alloy steel wire is immersed in a plating assisting solution and dried after plating assisting is completed, and a coated alloy steel wire is obtained; and immersing the coated alloy steel wire in Zn-5Al-0.1 Si alloy liquid for primary hot dipping, then immersing the coated alloy steel wire in Zn-5Al-1Mg-0.1 Ce alloy liquid for secondary hot dipping, and carrying out water cooling and drying to obtain the special super-strong alloy steel wire. According to the invention, by optimizing the ratio of the plating assisting liquid and carrying out double hot dipping on the alloy steel wire, double plating layers are formed on the surface of the alloy steel wire, so that the crack resistance and corrosion resistance of the alloy steel wire are improved, and the application range of the obtained special super-strong alloy steel wire in special industries is widened.

The invention discloses a double-layer aluminized composite film based on a magnetron sputtering aluminizing process and preparation and application thereof, and belongs to the technical field of preparation of aluminized composite films. According to the method, a needed plasma environment is provided for magnetron sputtering aluminum plating in a mode of heating and bombarding the surface of a target material by utilizing plasma, and when an aluminum plating base material is in a thermal stable state, functional coating acrylic resin can effectively reduce the problem of film deformation caused by thermal stress of an aluminum plating film in the sputtering process; the magnetron sputtering aluminum plating is performed on the two side surfaces twice, so that the thickness and the uniformity of the aluminum plating film can be ensured, the barrier property of the aluminum plating film to water vapor and oxygen at each time is also ensured, and a better bonding interface is provided for subsequent continuous film plating; and compounding is carried out after magnetron sputtering aluminum plating treatment, so that the compounding performance is accurately controlled. And finally, through double-time aluminum plating and double-time compounding, high barrier of the aluminum-plated composite film to water vapor and oxygen is realized.

The present application relates to the technical field of composite pipe thread brush plating layer, and particularly relates to a corrosion-resistant composite pipe thread brush plating layer and a preparation method thereof.A corrosion-resistant composite pipe thread brush plating layer comprises a bottom nickel layer, the bottom nickel layer is arranged on the surface of the composite pipe thread, the thickness of the bottom nickel layer is 1.0-2.0 microns, and a nickel-tungsten layer, the nickel-tungsten layer is arranged on the upper surface of the bottom nickel layer, and the thickness of the nickel-tungsten layer is 10-15 microns.The present application optimizes the composition structure of the corrosion-resistant composite pipe thread brush plating layer, adopts the structure of the double plating layer of the bottom nickel layer and the nickel-tungsten layer, instead of the technical scheme of the traditional single plating layer, since the nickel-tungsten amorphous alloy plating layer has the same structure, the chemical composition is uniform, so in the actual use process, the passivation protective layer is easy to appear, the corrosion-resistant anions in the external corrosion medium are effectively prevented from passing through the corrosion film through the formed amorphous passivation protective layer, and the phenomenon that the composite pipe thread is corroded is avoided.

The invention discloses a method for producing a corrosion-resistant overhead line based on a double-plating tank system. The method comprises the following steps: horizontally arranging a frame strander, an electrolyte tank I and an electrolyte tank II; a stranding disc is arranged on the side wall of the electrolyte tank; and the steel core passes through the frame stranding machine, the electrolyte tank I and the electrolyte tank II in sequence. The aluminum wire firstly horizontally penetrates through the two wire twisting discs on the first electrolyte pool, then penetrates through the wire twisting disc on the second electrolyte pool, and then is twisted with the steel core in the second electrolyte pool. And the frame stranding machine and the three wire stranding discs synchronously rotate around the steel core to twist the aluminum wires penetrating through the wire stranding discs on the steel core. According to the method, an existing stranding mode that the frame stranding machine and the plating tanks are stacked up and down is improved, the frame stranding machine and the double-plating-tank system are horizontally arranged, equipment installation and aluminum wire feeding are simpler, the electrolyte circulating system and the electrolyte tank can be arranged on the same plane, the fall between the electrolyte tank and the electrolyte circulating system is reduced, and energy consumption of a water pump is reduced.

The application discloses a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process and preparation and application thereof, and belongs to the technical field of aluminum-plated composite film preparation. In the method, heating and plasma bombardment of the surface of a target are used to provide a required plasma environment for magnetron sputtering aluminum plating. When the aluminum-plated base material is in a thermal stable state, the functional coating acrylic resin can effectively reduce the film deformation problem of the aluminum-plated film caused by thermal stress in the sputtering process. The double magnetron sputtering aluminum plating on the two sides can not only ensure the thickness and uniformity of the aluminum-plated film, but also ensure the barrier property of the aluminum-plated film to water vapor and oxygen, and provide a better bonding interface for subsequent continuous film plating. After the magnetron sputtering aluminum plating treatment, the composite is carried out, so that the composite performance is accurately controlled. Finally, through double aluminum plating and double composite, the high barrier property of the aluminum-plated composite film to water vapor and oxygen is realized.

The application discloses a super-high corrosion-resistant coated steel plate with good forming performance and a preparation method thereof. The super-high corrosion-resistant coated steel plate comprises a base body and a coating layer. The coating layer is a double-layer structure. The first layer is an electroplating layer, and the second layer is a hot-dip plating layer. The electroplating layer comprises 0.5-1% of Si and the balance of Al in percentage by weight. The hot-dip plating layer comprises 5-15% of Al, 3-8% of Mg, 0.5-0.9% of Si and the balance of Zn in percentage by weight. The application controls the electroplating process, the heating process and the post-plating cooling process by the base body design, the double-layer coating layer structure design and the coating layer component design, so that a suitable structure and phase structure are obtained. The prepared steel plate has good corrosion resistance and processing performance. The corrosion resistance can be 5-20 times of that of a pure zinc product with the same specification. The crack width is less than or equal to 20 microns after 0T bending processing, so that the balance control of the improvement of the corrosion resistance and the forming performance is realized.

The invention discloses an ultrahigh corrosion-resistant coated steel plate with good formability and a preparation method thereof. The ultrahigh corrosion-resistant coated steel plate comprises a substrate and a plating layer, the plating layer is of a double-layer structure, the first layer is an electroplated layer, the second layer is a hot-dip plating layer, the electroplated layer comprises the following components in percentage by weight: 0.5-1% of Si and the balance of Al, and the hot-dip plating layer comprises the following components in percentage by weight: 5-15% of Al, 3-8% of Mg, 0.5-0.9% of Si and the balance of Zn. According to the invention, through matrix design, double-layer coating structure design, coating component design and control of an electroplating process, a heating process and a cooling process after plating, a proper structure and phase structure are obtained, the prepared steel plate has good corrosion resistance and processability, the corrosion resistance can reach 5-20 times of that of a pure zinc product with the same specification, and the corrosion resistance can reach 5-20 times of that of a pure zinc product with the same specification. And the crack width after 0T bending processing is less than or equal to 20 microns, so that the improvement of corrosion resistance and the balance control of forming performance are realized.

The invention relates to the technical field of inductor plastic package, in particular to a plastic package inductor module based on double plating layers, a manufacturing method and a power supply device. The metal coating is arranged on the surface of the power conductor, current distribution is optimized, conductive efficiency is improved, contact resistance is reduced by 40% compared with that of a traditional copper coating, stability of the inductance module is improved, and the problems that in an existing plastic package inductance technology, a metal oxide layer is prone to being generated on the surface of the power conductor in a high-temperature and high-humidity environment, and the service life of the power conductor is prolonged are solved. And the long-term use stability is influenced. On the other hand, according to the frequency of a signal needing to be transmitted, signal transmission conductors of different structures are arranged in other areas, except for the exposed surface of the power conductor, of the outer surface of the plastic package structure, so that the transmission loss of the signal is reduced, and different signal transmission conductors can be arranged according to the types of different signals; and the transmission requirements of high-speed digital signals are met.

A kind of stranding equipment of corrosion-resistant overhead line, including horizontal arrangement frame stranding machine, electrolyte pool one and electrolyte pool two, steel core is sequentially passed through frame stranding machine, electrolyte pool one and electrolyte pool two.Electrolyte pool one side wall has stranding reel one and stranding reel two, electrolyte pool two side wall has stranding reel three.Aluminum conductor is sequentially passed through stranding reel one, stranding reel two and stranding reel three after being led out from frame stranding machine and enters electrolyte pool two.Frame stranding machine rotates around steel core, and each stranding reel rotates synchronously with frame stranding machine to stranding aluminum conductor on steel core.A kind of stranding equipment of corrosion-resistant overhead line of the utility model, improves the stranding mode of the frame stranding machine and the plating pool upper and lower stacking of existing, frame stranding machine and double plating pool system horizontal arrangement, equipment installation, aluminum conductor loading more simple, electrolyte circulation system can be set in same plane with electrolyte pool, reduce the fall of electrolyte pool in electrolyte circulation system and reduce water pump energy consumption.