15 results about "Laser peening" patented technology

The invention provides a method for improving the corrosion fatigue performance of aluminum and / or magnesium alloy by combining laser peening with peak aging and an aluminum and / or magnesium alloy finished product. The method comprises the following steps: S1, carrying out solution treatment on to-be-treated aluminum and / or magnesium alloy; s2, the aluminum and / or magnesium alloy subjected to solution treatment is subjected to laser shot peening treatment; and S3, the aluminum and / or magnesium alloy subjected to laser peening treatment is subjected to peak aging treatment. According to the method, the initial nanometer precipitated phase can be dissolved through the solid solution treatment to form a single-phase supersaturated solid solution, dislocation pinning can be effectively promoted through the laser shot peening treatment, more and more stable gradient dislocation structures are reserved in the subsequent peak value aging process of the aluminum and / or magnesium alloy, power is provided for nucleation and growth of the nanometer precipitated phase, and the mechanical property of the aluminum and / or magnesium alloy is improved. And a surface layer overaging state-core peak aging state continuous transition structure is constructed in combination with subsequent peak aging treatment, and the continuous transition structure endows the aluminum and / or magnesium alloy with corrosion fatigue resistance and high strength characteristics.

The application provides a laser shot forming system and method for measuring and planning integration, comprising a laser scanning forming module, an in-situ measurement module and a process planning module; the in-situ measurement module is used for measuring the geometric surface profile of a forming workpiece in-situ, and transmitting the surface profile data to the process planning module; the process planning module calculates the deviation from a target surface profile according to the geometric surface profile obtained by the in-situ measurement module, and plans a process scheme for laser shot forming; and the laser scanning forming module realizes laser shot forming of the workpiece according to the planned process scheme for laser shot forming. The system and method form a closed-loop process flow of in-situ measurement, process planning and laser shot forming, and realize the integrated laser shot precise forming of a large workpiece in the mode of "measurement-planning-forming".

The invention discloses a repair process parameter determination method based on laser peening and cladding compounding, and relates to the technical field of laser machining.The method comprises the steps that firstly, a laser peening process is used for presetting residual compressive stress on the surface of a notch of a damaged part, refining grains and regulating and controlling the surface roughness, and therefore feature gradient distribution after laser cladding repair is improved; the process parameters of the method are jointly determined by parameters such as residual stress, grain size and surface roughness, the strength and fatigue life of the joint surface of the repaired part can be accurately improved, and the problem of repair failure caused by single laser cladding or non-standard selected values of the process parameters is avoided.

This application discloses a composite shot peening strengthening method for aerospace load-bearing structural components. The method includes dividing the shape-dependent regions or areas with high tensile stress distribution of the aerospace load-bearing structural components into regions and designing composite shot peening paths; designing process parameters for CNC mechanical microparticle shot peening and laser shot peening; performing CNC mechanical microparticle shot peening and laser shot peening; and finally, inspecting the shot peening strengthening quality of the aerospace load-bearing structural components. This application provides a composite shot peening strengthening method for aerospace load-bearing structural components, which can achieve composite shot peening strengthening of aerospace load-bearing structural components, increasing the residual compressive stress layer on the surface of the structural components while reducing surface roughness, effectively and quickly realizing composite shot peening strengthening of load-bearing structural components.

The present invention addresses a problem in which a metal is easily corroded by rust when water is used as a plasma confinement layer in a laser peening method utilized as a metal surface modification method.　This laser processing method comprises a step of applying or affixing a gel-like substance to a processing region of an object to be processed, and a step of repeatedly irradiating the processing region with a laser. Because the laser processing method allows use of a gel-like substance containing no water as the plasma confinement layer, corrosion of the metal, which is the object to be processed, due to rust can be avoided. The gel-like substance is suitably used as a physical gel.

A soft magnetic alloy ribbon is made of a Fe-based soft magnetic alloy and includes a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction, and a domain wall extending in a third direction, in which D0<D1 where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line, a straight line which has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line, a width of the domain wall at a position intersecting the central line is defined as D0, and a width of the domain wall at a position intersecting the first reference line is defined as D1.

The invention discloses a composite coating for a high-pressure hydrogen pipeline and a preparation method and application thereof, the composite coating comprises a hydrogen storage layer and a hydrogen blocking layer, the hydrogen blocking layer is coated on the hydrogen storage layer, the material of the hydrogen storage layer is an oxide material, and the material of the hydrogen blocking layer is an inorganic-organic mixed coating. In the technical scheme provided by the invention, firstly, laser peening strengthening is carried out on the surface of the matrix to refine crystal grains and reduce the hydrogen embrittlement sensitivity of the material, then, the oxide hydrogen storage layer is arranged to effectively absorb infiltrated hydrogen atoms, and finally, the hydrogen resistance layer made of an organic polymer and a two-dimensional material is arranged on the outermost layer to effectively absorb the hydrogen atoms. And external hydrogen atoms can be prevented from entering, and meanwhile the anti-corrosion function is achieved. The composite coating can be used for the inner surface of the hydrogen conveying pipeline, the risk of hydrogen damage of the pipeline is effectively reduced, the corrosion resistance is improved, and long-period stable operation of the high-pressure hydrogen pipeline is guaranteed.

This invention discloses a method, device, terminal equipment, and storage medium for preventing tooth breakage based on laser peening, belonging to the field of gear surface strengthening technology. The method involves: acquiring the pulsed laser parameters and impact path of the gear to be treated during laser peening; providing an energy absorption layer at the root of the gear tooth, which is covered by a constraint layer; generating a laser scanning command based on the pulsed laser parameters and impact path, and sending the laser scanning command to a laser generator to control the laser beam to scan, so that the laser beam penetrates the constraint layer and irradiates the energy absorption layer; after being irradiated, the energy absorption layer absorbs laser energy to form plasma, and the plasma generates an inwardly propagating shock wave under the constraint of the constraint layer, inducing plastic deformation at the gear tooth root position and forming a residual stress layer on the surface of the gear tooth root. Therefore, by implementing this invention, the problem of insufficient depth of the residual compressive stress layer on the tooth root surface in the prior art can be solved.

This invention relates to a method for preparing an arc-shaped water-collecting surface using laser shot peening assisted by a pressurized gas environment. The method includes placing a sealed reaction chamber in a first pressurized gas environment, irradiating the surface of an aluminum plate with a high-energy short-pulse laser under the influence of this environment to prepare a hydrophilic arc-shaped water-collecting region, discharging the gas from the sealed reaction chamber, injecting He gas to maintain this for ten minutes, and then placing the sealed reaction chamber in a second pressurized gas environment. Under the influence of this second pressurized gas environment, irradiating the surface of the aluminum plate with a low-energy short-pulse laser to prepare an arc-shaped superhydrophobic region. This process is repeated alternately. This method facilitates the formation of a denser micro / nano structure on the surface of the aluminum alloy, enabling in-situ generation of carbon / oxygen-based reinforcing phases and further improving the mechanical properties of the aluminum alloy water-collecting surface.

This invention discloses a GH4169 high-temperature alloy component and its laser shot peening-cladding repair and application. The process includes pretreatment of the GH4169 high-temperature alloy substrate surface to be repaired; impact strengthening of the repaired area using laser shot peening; and subsequent material deposition repair using laser cladding in the pretreated area to obtain a cladding repair layer. Under the thermal cycling effect of laser cladding, the high-density lattice defects pre-placed by laser shot peening act as heterogeneous nucleation cores, promoting the formation of fine equiaxed grain bands at the substrate / cladding layer interface and creating a gradient microstructure of fine-grained to coarse-grained to fine-grained in the heat-affected zone. This invention significantly improves the substrate / cladding layer interface microstructure, reduces grain coarsening in the heat-affected zone, mitigates the adverse effects of residual tensile stress, and enhances the load-bearing capacity of the repaired area. The resulting repaired component exhibits higher microhardness and tensile strength, making it suitable for life-extending repair of aero-engine blades, casings, seals, and other critical GH4169 high-temperature alloy components.

The invention relates to the technical field of laser shock peening, and particularly discloses a laser shock peening method for an in-situ non-detachable structure, and the method comprises the following steps: inspection before laser shock, equipment preparation and detection of an area to be peened; carrying out unfolding installation and function debugging on the laser strengthening equipment; laser pulse energy, pulse width, spot size and strengthening strength are tested, so that laser parameters are stable and meet preset requirements; a laser path is generated according to the to-be-strengthened area, and arrangement of an absorption layer and a restraint layer, energy setting, laser shock processing and quality inspection are completed in sequence; and finishing final quality inspection and arrangement and resetting of the equipment and the site. According to the method, the strengthening effect equivalent to that of vertical incidence can still be obtained under the complex space condition, the spot size and path planning are optimized, the amplitude, depth and distribution of residual compressive stress are more uniform, and therefore the anti-fatigue capacity and long-term service reliability of the structure are improved.

The application provides a kind of integrated composite processing device of laser welding and laser shot peening, including mobile device, laser welding-shot peening assembly, water tank, water injection system, workbench and control system;The laser welding-shot peening assembly includes laser welding device, mechanical arm clamping assembly and laser shot peening device;The laser welding device and laser shot peening device are installed on the mechanical arm clamping assembly;The mechanical arm clamping assembly is connected with the mobile device, for driving the laser welding device and laser shot peening device to move along the processing surface;An inclined surface of the water tank is provided with a workbench parallel to the inclined surface;The water injection system is used to inject water into the water tank;The control system controls the water injection amount, so that the horizontal surface in the water tank coincides with the laser shot peening processing point.The device can realize the synchronous movement of laser shot peening and laser welding, the water surface and the laser nozzle are synchronously raised, the shot peening efficiency is effectively improved, the weld surface quality after impact is uniform, and the precision requirement is high.

The application discloses a whole ribbed component laser shot forming prestress clamp, which comprises a base, a shell, a driving assembly, a clamping plate, a deformation assembly and a dust removal assembly. The base is internally connected with the shell in a sliding mode. The bottom of the shell is provided with the driving assembly. The shell is internally and symmetrically provided with the two clamping plates and the deformation assembly. The side wall of the shell is provided with the dust removal assembly. The ribbed component is placed in the shell before shot forming. The driving assembly drives the shell to move to the tail end of the base, drives the two clamping plates to approach each other to clamp the component, drives the deformation assembly to protrude upward at the same time that the two clamping plates approach each other, and deforms the component in cooperation with the clamping plate. Meanwhile, the dust removal assembly is driven to remove the dust generated when the component deforms in the process that the shell moves. The shell moves to the tail end of the base and is located at the bottom of a shot forming equipment. The deformed component is subjected to shot forming. The deformed component does not need to be additionally subjected to dust removal operation, and the shot forming efficiency is improved.

The application discloses a double-sided laser shot peening cumulative forming device and method, which comprises a laser shot peening system, a motion control system, an information acquisition system, a sample rotating system and the like. The application solves the problem of inconsistent curvature change of plate deformation when single-sided and single-time shot peening is performed. The method utilizes a rotating clamping system to realize interval shot peening of the double sides of the plate, combines cumulative forming and concave-convex deformation modes, sets an energy gradient of a shot peening surface, and realizes real-time monitoring of a shot peening process and adjustable parameters, so that the curvature of plate deformation can be greatly improved, and the deformation precision can be improved.

This invention relates to an ion implantation process for wear-resistant surface modification of high-strength and tough titanium alloy plates, belonging to the field of alloy surface treatment technology. The process includes: surface pretreatment of TC4 titanium alloy plates, deposition of a yttrium-containing Ti-Y composite coating using magnetron sputtering, laser peening of the coating, and boron ion implantation. This invention achieves a composite modified layer on the titanium alloy surface with a gradient transition in hardness and toughness through Ti-Y coating toughening, laser peening to construct diffusion channels and residual compressive stress fields, and boron ion implantation to form an ultra-hard TiB / TiB2 phase. This effectively solves the problems of shallow ion implantation depth and brittle, easily peeling hardened layers in traditional methods, significantly improving wear resistance while maintaining the toughness of the matrix.