478 results about "Residual stress" patented technology

The invention provides a cold-rolled sheet shape multivariable cooperative control optimization method and system. The method comprises the steps that rolling tension set value parameters are determined on the basis of a dynamic coupling model so as to be matched with dynamic tension fluctuation in the high-speed strip steel rolling process of a cold-rolled sheet, the magnetic conductivity change in the strip steel rolling process is detected through the magnetoelastic effect, and a magnetic conductivity gradient map is generated; residual stress distribution data are inverted based on the magnetic conductivity gradient map, and target axial roll shifting control parameters influencing the roll gap shape are generated; and multivariable cooperative matching is conducted on the rolling tension set value parameter and the target axial roll shifting control parameter, a matching result is obtained, the rolling tension and the roll gap shape are adjusted, and strip steel deviation and fluctuation caused by dynamic coupling of the composite material tension and the cold-rolled sheet shape in the cold-rolled sheet high-speed strip steel rolling process are restrained. According to the technical scheme, through cooperative control of the dynamic coupling model and the magnetic conductivity gradient map, deviation and fluctuation of the strip steel are effectively restrained, and the shape stability and rolling precision of the cold-rolled plate are improved.

A component (202) is disclosed that includes a body (206) and an additive manufactured (AM) metal mass (200) that includes a first section (292) and a stress relief section (294). The stress relief section (294) includes a porous region (300) having a porosity in which an open spatial volume accounts for 2% to 50% of the total volume of the stress relief section (294). The stress relief section (294) has a smaller at least one of thermal conductivity, tensile strength, ductility, and fatigue strength than the first section (292). A braze material (310) couples the AM metal specimen block (200) to a specimen block opening (204) in the body (206). The stress relief section (294) creates a low stress zone in the metal specimen block (200), which can be located near or adjacent to a high stress zone. The stress relief section (294) reduces residual stress in the metal sample block (200), which reduces related challenges to couple the metal sample block (200) to the body (206) of the component (202), particularly in the case of the use of superalloy materials.

The method comprises the following steps: constructing a thermal shock test environment, carrying out a thermal shock cycle test on the refractory material, and collecting thermal shock cycle data; monitoring and recording the performance change of the material in the thermal shock cycle process; based on the thermal shock cycle data, a thermal shock historical memory model of the refractory material is established, and the change rule of the performance of the refractory material along with thermal shock cycle is analyzed; constructing a life prediction model, and predicting the service life of the material under a specific working condition; comprehensively evaluating the heat resistance and earthquake resistance of the material according to a model analysis result, and outputting an evaluation result. By monitoring the temperature gradient, the residual stress and the crack propagation in the thermal shock cycle in real time, the cumulative damage model and the service life prediction model are established, and accurate quantitative evaluation of the heat resistance and shock resistance of the refractory material is realized. The scientificity and dynamic adaptability of material performance evaluation are remarkably improved, and technical support is provided for material optimization design and high-temperature environment application.

The invention discloses a multi-laser multi-material laser cladding 3D printing method and system, and relates to the technical field of 3D printing, and the method comprises the steps that according to a three-dimensional model of a target component, a printing path and a lap joint point position are determined; carrying out regional division on the working face; a sensor is used for detecting the thickness of each layer in real time, and the printing speed and the laser power are adjusted according to detection data; laser welding is carried out on a lap joint area between the printing layers, and laser annealing is carried out to release residual stress; and according to component requirements, different materials are dynamically switched in the printing process. The multi-printing-head and multi-laser-device cooperative work, path optimization and dynamic feedback control, material dynamic switching and laser annealing treatment technologies are adopted, and the problems of size limitation, insufficient interlayer binding force, complex material switching, path conflict and thermal stress in the large forming part manufacturing process are fundamentally solved. Compared with a traditional process, the printing efficiency, the finished product quality and the production flexibility are remarkably improved.

The invention relates to the technical field of temperature control, in particular to a nanocrystalline glass annealing treatment temperature dynamic monitoring control method and system, and the method specifically comprises the steps: capturing an unsteady thermal radiation signal in a glass internal microcrystalline phase change process in real time, and synchronously obtaining three-dimensional residual stress distribution data; dividing the annealing process into gradient crystallization control units according to the time-temperature transition characteristic of the glass; constructing a crystal phase evolution model, and dynamically analyzing the coupling relationship between the microcrystal nucleation rate and the residual stress of each gradient crystallization control unit; and a multi-target particle swarm optimization algorithm is adopted, and temperature field gradient distribution is corrected in real time in combination with grain boundary migration kinetic parameters. According to the invention, the problem of residual stress accumulation and grain size mismatch in a nanocrystalline glass annealing process in the prior art is solved.

The invention relates to the technical field of metal composite material rolling, and discloses equipment and a process for hot-warm wave flat rolling of a titanium steel composite plate. The rolling assembly comprises a first rolling piece and a second rolling piece, and a plate is firstly subjected to corrugated rolling through the first rolling piece and then subjected to flat rolling through the second rolling piece; the straightening part is used for straightening the plate subjected to corrugated rolling; the conveying part is arranged on the rack, located above the first rolling part and used for stably conveying the heated plate; and the heating assembly comprises a heat preservation piece and two heating pieces, the two heating pieces are arranged on the first rolled piece and the second rolled piece correspondingly and used for heating the plate materials before rolling, and the heat preservation piece is arranged on the conveying piece and used for conducting heat preservation on the conveyed plate materials. According to the invention, the bonding strength of the composite plate is improved, the residual stress of the rolled plate is reduced, the phenomena of tail slippage, tail cracking, oxidation and the like of the plate are avoided, and the phenomenon of surface cracking caused by poor metal plasticity is avoided.

The invention provides a laser cladding 3D / 4D printing system and method, and the method comprises the following steps: S1, constructing a three-dimensional model of a to-be-printed piece, slicing the three-dimensional model, and generating a two-dimensional interface diagram of each layer of printing; s2, the additive manufacturing material of the current layer is melted through first laser to form a cladding layer; s3, carrying out micro-shaping on the surface of the cladding layer by using second laser, firstly carrying out micro-shaping on rough and hole defect areas on the surface of the cladding layer, and then carrying out point heat source irradiation on the surface of the cladding layer to eliminate residual stress of the cladding layer; and S4, the steps S2-S3 are repeated, the additive manufacturing process of each layer is completed, and a printed piece is obtained. According to the method, ultrafast laser shaping is carried out on the cladding layer in the laser 3D / 4D printing process, so that the problems of residual stress, interface-surface holes, uneven roughness and powder agglomeration and accumulation of the cladding layer of a laser 3D / 4D printing workpiece are solved, and the quality of the laser 3D / 4D printing workpiece is improved.

The invention belongs to the technical field of thin-wall part machining, and particularly relates to a thin-wall part machining method and system.The thin-wall part machining method comprises the steps that before thin-wall part finish machining, a part blank is subjected to multiple times of cutting machining with the same cutting parameter and cutting track, so that a feeding current curve of each time of cutting machining is obtained; according to the change characteristics of the multiple feed current curves in the same track interval, whether the part blank has an abnormal area on the cutting track or not is judged; when the part blank has the abnormal area, a target feeding curve of the thin-wall part is generated according to the at least one feeding current curve; and cutting the residual material of the thin-wall part according to the target feeding curve. According to the method, the feeding current curve is obtained through multiple times of cutting, abnormal areas such as hardness distribution difference and residual stress distribution difference of the part blank can be accurately positioned through curve fluctuation characteristics, similarity analysis and fluctuation frequency / mean value judgment, and machining defects caused by uneven materials are avoided.

A mirror image additive manufacturing method for a composite material component is characterized in that the position of a virtual central plane of the component is determined, and double laying heads symmetrical along the central plane are arranged on the two sides of the central plane; the double laying heads are respectively provided with heat sources; the double laying heads synchronously move along the laying track and mutually provide opposite supporting force, the angle of the supporting force is valued in the angle range between the normal direction of the central plane and the normal direction of the surface of the component, and when the normal direction of the central plane and the normal direction of the surface of the component are not collinear, the virtual central plane is updated according to the geometric center position of the current laid component; and the material spreading speeds of the double spreading heads are independently controlled. In order to solve the problems of large deformation and poor performance caused by unbalanced residual stress inevitably formed by traditional single-side heating, single-side pressurizing and single-direction laying, the invention provides a method for introducing opposite-vertex double laying heads on two sides of the component, so that small and balanced distribution of stress is ensured, and the manufacturing precision and quality of the composite material component are effectively improved.

The invention discloses a TiSiN / TiBC multilayer hydrogen-resistant wear-resistant coating as well as a preparation method and application thereof, and belongs to the technical field of material preparation. The TiSiN / TiBC multi-layer structure composite hydrogen-resistant wear-resistant coating is prepared on the surface of the steel substrate through the high-frequency pulse magnetron sputtering technology, the middle transition layer is designed between the steel substrate and the hydrogen-resistant coating, and the transition layer has good toughness and the thermal expansion coefficient (8 * 10 <-6 >-12 * 10 <-6 > / DEG C) matched with the substrate; the residual stress between the coating and the steel substrate is effectively reduced, the fracture toughness and binding force of the hydrogen-resistant coating are improved, the binding force of the coating is improved, and then the wear resistance of the coating is remarkably improved. And meanwhile, a large number of vacancy bonds such as Si-bonds, B-bonds, C-bonds and N-bonds contained in the hydrogen-resistant coating can be used for capturing hydrogen atoms, so that the capturing capacity on the hydrogen atoms is improved, the permeation effect of hydrogen is further inhibited, and the hydrogen-resistant efficiency of the coating is remarkably improved.

The invention relates to the technical field of electroplating, and discloses a ceramic substrate through hole electro-coppering hole filling process control method which comprises the following steps: acquiring structural parameters of a target ceramic substrate through hole, optimizing the proportion of a prefabricated electroplating solution to obtain a proportioned electroplating solution, analyzing a composite electroplating medium of the proportioned electroplating solution, and inquiring a pulse current waveform; the copper deposition morphology is monitored, polarization effect coefficients under different current densities are calculated, duty ratio indexes are optimized to score a shaped current sequence, a multi-order electric field is applied to obtain in-hole flow field data, and the copper deposition uniformity is calculated; and performing multi-cycle electroplating-annealing iteration to obtain a copper hole filling structure, testing residual stress, identifying a lattice distortion section, generating a crystallization-annealing curve, and formulating a process optimization scheme according to regulation and control data. According to the invention, the reliability of the through hole electro-coppering filling process can be improved.

The invention relates to the technical field of composite material and metal connection, in particular to a carbon / carbon composite material, a modification method and a nickel-based high-temperature alloy brazing method thereof, a SiC coating and a Mo-Si coating are sequentially embedded and sprayed on the carbon / carbon composite material, and a SiC-MoSi composite coating is formed on the surface of the carbon / carbon composite material through high-temperature heat treatment curing. Due to the existence of the SiC-MoSi composite coating, a CTE transition layer is provided for a connector, residual stress caused by thermal expansion difference is reduced, conditions for generating Mo-based compounds are created, wettability and interface bonding strength of brazing filler metal and base metal can be improved, interface reaction of the base metal can be optimized, a uniform and continuous brazing layer is formed, and the service life of the brazing filler metal is prolonged. Therefore, the brazed connection is higher in strength and more stable, and is more suitable for connection of large-size components and service under the high-temperature condition. The problems that in the prior art, the connection performance of a carbon / carbon composite material and dissimilar metal is poor, and failure is prone to occurring are solved.

A glass and metal laser welding method using a double-layer structure solder and its solder, the method includes: surface pretreatment, ultrasonic cleaning of the metal and glass surfaces, using pulsed laser deposition technology to sequentially deposit nano-Si and Al double-layer thin film pre-solder in the area to be welded on the glass surface; assembly, assembling the glass and metal according to the requirements of the connection joint, placing the glass solder with the pre-solder downward on the metal, and clamping the two with a clamp; nanosecond laser welding, focusing the laser on the contact surface of the thin film solder and the glass, and keeping the focus on the same plane, turning on the laser to scan and weld on the focal plane; post-welding treatment, using high-frequency nanosecond laser for post-welding heat treatment, and naturally cooling the joint after treatment. The present invention can accurately control the thermal effect generated in the tiny welding area, improve the wettability between the glass and metal interface, inhibit interface brittle compounds, and reduce thermal stress and residual stress.

The invention relates to the technical field of 3D glass, in particular to a 3D glass cover plate forming parameter optimization system and method based on dynamic temperature and pressure regulation, and the method comprises the steps: building a mathematical model which comprehensively considers the coupling effect of a temperature field, a stress field and a flow field, and processing a control equation set through a numerical discretization method, a discretization model of the glass forming process is obtained, and a discretization equation is solved; establishing a multi-target parameter optimization model by taking geometric accuracy and residual stress of the formed glass cover plate as optimization targets and taking mold temperature and pressure as optimization design variables; a dynamic temperature and pressure regulation and control strategy is designed, and an optimal mold temperature and pressure curve is obtained through searching by means of an intelligent optimization algorithm; the actual effect of the dynamic temperature and pressure regulation strategy is evaluated by measuring and statistically analyzing the geometric accuracy and residual stress of the formed glass cover plate. The method provides a new thought and method for high-quality and high-efficiency manufacturing of the 3D glass cover plate.

The invention provides a cavity thin-wall part printing method and system, a storage medium and equipment, and the method comprises the step of adopting a cavity part regional printing processing method with different forming parameters. A thin-wall cavity part of a part is independently split into an integral part through three-dimensional modeling software, a main body structure part and a thin-wall cavity structure part are split into a plurality of parts, and different filling printing parameters are adopted for machining the parts of different structure parts. By means of the printing method, heat accumulation can be effectively shared, distribution of residual stress is reduced, finally, the size structure precision of the thin-wall part is effectively guaranteed, and the printing success rate of the complex cavity part is increased.

The invention provides a method for preparing high-strength low-thermal-expansion invar alloy through laser cladding and the high-strength low-thermal-expansion invar alloy. According to the method for preparing the high-strength low-thermal-expansion invar alloy through laser cladding, in the printing process of each layer, when the invar alloy is printed, a rolling head is utilized to move along the surface of the printed invar alloy in the printing direction, and the rolling head applies certain load pressure to the invar alloy; according to the method, invar alloy grains can be remarkably refined, residual stress distribution in the printing process is improved, the size and number of defects in the printing process are controlled by introducing plastic deformation through in-situ rolling, and the density of a printed component is improved; according to the method, the yield strength of the invar alloy component is greatly improved on the premise that the low thermal expansion coefficient is guaranteed when the invar alloy component is prepared through the laser cladding technology.

The invention discloses a welding thermal stress simulation method, device, equipment and medium based on a crystal plasticity finite element, and relates to the technical field of welding thermal stress finite element simulation. The method comprises the steps that a sample is prepared according to a specific multi-phase metal material, and phase distribution and crystal orientation information of a two-dimensional plane of the material are obtained through a metallographic experiment; and a three-dimensional multi-grain model is constructed based on the two-dimensional information. According to the method, a crystal plastic constitutive model is adopted to describe the flowing behavior of the material at high temperature, crystal slippage and polycrystal interaction are considered, the influence on the material performance is reflected from the microstructure evolution level, and the problem that the influence on the macroscopic mechanical performance of a microstructure is difficult to capture in welding multiphase metal material simulation is solved; two-dimensional representation is obtained through a metallographic experiment, the Young modulus and rigidity matrix parameters are accurately calculated by combining forward stretching and shear simulation, the rigidity matrix precision is improved, a temperature field area is divided, stress evolution and residual stress are calculated by combining a thermal-elastic-plastic model, and the welding thermal stress calculation precision is improved.

The invention belongs to the field of aluminum alloy casting processes, and relates to a design method of a pouring system for casting a large wallboard component. Firstly, the mold filling process of molten metal is not only driven by pressure in a low-pressure casting machine, but also driven by gravity, the mold filling capacity of the molten metal in the thin-wall structure is enhanced, and complete forming of the thin-wall structure is easy to achieve; secondly, the thick cross gate cannot form a complete whole during casting, so that the non-uniformity of residual stress in the casting process is greatly reduced, and the deformation in the casting process is reduced; and finally, the structure of a pouring system is simplified, modeling and assembling are simplified, a casting mold does not need to be overturned, the workload is reduced, and it is guaranteed that the position of a mold core is stable.

The invention discloses a molten drop arc-laser induced additive and subtractive integrated manufacturing system and method. The method comprises the steps that raw materials are heated through one or more energy sources to form molten drops; multiple kinds of energy are synchronously applied to molten drops to form a composite molten pool, in-situ coupling of additive and subtractive materials is achieved, and material removal is conducted on a cladding layer while material adding is conducted in the composite molten pool; dynamically adjusting the energy ratio and spatial-temporal distribution of each energy field, and optimizing the droplet transition and metallurgical quality; when the temperature of the cladding layer is reduced to a solid-liquid mixing interval or a thermoplastic deformation interval, shaping and surface processing are carried out, and the ideal component shape and surface smoothness are achieved; energy field parameters are dynamically adjusted based on real-time feedback of multi-sensor data, residual stress is inhibited in combination with a heating compensation technology, the heating compensation technology is used for effectively controlling heat input and stress release, and it is ensured that the stress state of a component in the manufacturing process is effectively managed.

An electromagnetic field assisted laser additive manufacturing device and method comprises a laser cladding mechanism, an electromagnetic field regulation and control mechanism and an electromagnetic impact mechanism, the laser cladding mechanism plans and controls a deposition path of a laser cladding head through a laser cladding mechanical arm, and the electromagnetic impact mechanism plans and controls a moving path of an electromagnetic impact coil through an electromagnetic impact mechanical arm. The variable curvature characteristic of a deposition path in the additive manufacturing process is adapted; an electromagnetic field is introduced in the metal laser additive manufacturing process, a substrate is preheated through electromagnetic induction heating, a molten pool is regulated and controlled through electromagnetic force, and metallurgical defects are reduced from the source; and meanwhile, by means of high-speed pulse electromagnetic force, synchronous impact is conducted on the surfaces and the side faces of the multiple layers of welding beads with the deposition path curvature continuously changing, then metallurgical defects such as air holes, incomplete fusion and cracks in the metal laser additive manufacturing process are restrained, grains are refined, residual stress is reduced or even eliminated, and high-performance and high-precision additive manufacturing of metal forming parts is achieved.

The invention provides a stress distribution optimization method and system for lens processing, and is applied to the field of data distribution processing. The internal stress information of the pre-selected material is identified and compared with the preset threshold value, the potential stress concentration area is accurately found, the crystal structure and the cutting mode of the material are combined, the cutting parameters are dynamically adjusted to reduce the machining residual stress, meanwhile, the problem area is rapidly positioned through simulation and actual stress distribution matching detection, and the machining precision is improved. And secondary annealing is conducted on the unmatched area to release residual stress, the surface stress state is adjusted through the technologies of low-temperature coating, ion-assisted coating, laser-assisted coating, sputter coating and the like, and the internal stress of the coating is introduced to achieve overall stress redistribution.

The invention relates to the technical field of optical element machining, in particular to an HUD free-form surface mirror machining method which comprises the following steps of S1, substrate selection and cutting, S2, edge treatment, S3, first-stage hot bending forming, S4, second-stage hot bending forming and S5, grinding. According to the machining method disclosed by the invention, through cooperative use of the first-stage hot bending forming and the second-stage hot bending forming, machining operation of the free-form surface mirror with the large size, the large curvature and the small thickness can be achieved; meanwhile, through the two-stage hot bending forming process, primary forming is conducted through first-stage hot bending forming, pressure maintaining is conducted near a softening point through second-stage hot bending forming, the glass is evenly heated and stressed, residual stress is effectively released, the surface type is promoted to present an ideal gradual change trend, edge distortion is greatly reduced, and the high-precision surface type of the final curved mirror is ensured.

The invention discloses a method for testing heat treatment residual stress of a bearing ring based on nanoindentation, and belongs to the technical field of stress testing. The method comprises the following steps: establishing a calibration curve, preparing and testing a sample, and calculating residual stress. According to the method, the indentation work-residual stress quantitative calibration curve for the bearing steel is established through finite element simulation, the specific constitutive relation of materials is fully considered in the model, and system errors caused by mismatching of material parameters of a general model are eliminated. The change trend of the residual stress value calculated by the method is consistent with that of a prediction result of finite element analysis, and it is proved that the method can accurately, reliably and quantitatively characterize the residual stress distributed in the microscale after heat treatment.

An intelligent method for optimizing scan sequences in additive manufacturing processes is disclosed. The method integrates thermomechanical modeling to optimally select scan paths that minimize part deformation, residual stresses or other thermomechanical metrics of printed parts. Unlike prior approaches that rely solely on thermal models, the disclosed method incorporates both thermal indicators, e.g., derived from simulated or sensor-based temperature distributions, and mechanical indicators, e.g., those capturing deformation or stress via finite element analysis. These indicators are combined into an objective function, which is minimized using an optimization strategy executable within the interlayer time of the additive manufacturing process. The method is compatible with laser powder bed fusion (LPBF), electron beam powder bed fusion (EB-PBF), directed energy deposition (DED). The method is broadly applicable to any process involving localized heating and material deposition.

The invention provides an intelligent temperature control method and system for relieving stress of a glass annealing kiln. The method comprises the following steps: transmitting acoustic surface waves through a distributed sonic sensor to collect stress propagation data in glass, decoupling coupling characteristics of sound velocity and temperature, extracting a relaxation time constant, and generating a stress relaxation rate; performing time difference cross-correlation analysis to construct a stress propagation three-dimensional gradient field, establishing an incidence relation between the relaxation rate and the gradient field, and constructing a mapping strategy of the temperature set value and the relaxation rate according to the incidence relation; generating a dynamic temperature adjusting parameter and converting the dynamic temperature adjusting parameter into a heater power control signal; and dynamically adjusting a stress data feature extraction rule to match a real-time stress state according to the relevance between the gradient field update frequency and the temperature adjustment rate. According to the application, dynamic mutual optimization of the annealing stress elimination efficiency and the kiln temperature setting precision is realized, the glass residual stress is reduced, and the hidden danger of plate explosion is eliminated.

Disclosed in the present invention is a radiation-insensitive single-mode optical fiber, comprising a core, a first cladding, and a second cladding which are sequentially arranged from inside to outside, or comprising a core, a first buffer layer, a first cladding, a second buffer layer, and a second cladding which are sequentially arranged from inside to outside. The core, the first buffer layer, the first cladding, the second buffer layer, and the second cladding are all made of quartz glass doped with a cerium element, an aluminum element, and a fluorine element. The contents of the cerium element, the aluminum element, and the fluorine element are constant in the radial directions of the core, the first cladding, and the second cladding, respectively, and linearly vary in the first buffer layer and the second buffer layer, respectively. In the present invention, by regulating and controlling the contents of the cerium element, the aluminum element, and the fluorine element in the core, the first cladding, and the second cladding of the optical fiber, the stress distribution of the optical fiber is optimized, the residual stress is reduced, and the generation of fatigue bonds and wire drawing defects in the optical fiber is reduced, thereby improving the radiation resistance of the optical fiber.

The utility model relates to the technical field of brazing clamps, and provides a brazing clamp for a copper-clad plate, the brazing clamp comprises a plurality of clamping plates and a plurality of locking pieces, at least one of every two adjacent clamping plates is provided with a limiting groove with an opening facing the other clamping plate, and the limiting grooves are used for containing copper foil of the copper-clad plate so as to limit the copper foil; and the plurality of locking pieces are used for locking and fixing the plurality of clamping plates and the copper-clad plate together. According to the brazing clamp for the copper-clad plate, the limiting grooves are formed in the clamping plates, so that the periphery of the copper foil is limited through the limiting grooves in the brazing process, thermal expansion of the copper foil is hindered, and after brazing is finished, the shrinkage degree of the copper foil is close to that of the ceramic substrate; the residual stress caused by large thermal expansion difference between the copper foil and the ceramic substrate is greatly eliminated, and the problem of warping of the ceramic substrate is solved.

The present application discloses liquid crystal dimming glass having an asymmetric structure, comprising a first transparent substrate, a first film layer, a dimming film layer, a second film layer and a second transparent substrate which are laminated, pasted and fixed. The thickness of the first transparent substrate and the first film layer is necessarily smaller than that of the second transparent substrate and the second film layer, guaranteeing that the film layers and the substrates on two sides of the dimming film layer are of an asymmetric structure, so that the stress field of the dimming film layer after the high-temperature and high-pressure lamination process is asymmetrically distributed, which facilitates releasing the stress when the dimming film layer returns to the room temperature, thereby reducing the residual stress. The residual stress of the dimming film layer is significantly lower than that of the traditional liquid crystal dimming glass, avoiding liquid crystal aggregation in the dimming film layer, effectively solving the problem of uneven color after lamination.

The invention provides a 3D printing metal material and a modification method thereof, and relates to the technical field of metal modification. According to the modification method of the 3D printing metal material, metal titanium / titanium alloy for laser 3D printing serves as an initial material, a wrapping material and a packaging layer are sequentially formed to obtain a synthetic block, and then the 3D printing metal titanium with high toughness is obtained through a direct high-pressure treatment process. The ultra-high pressure can inhibit long-range diffusion of atoms, so that coarsening of crystal grains at high temperature is avoided; meanwhile, grain refinement can be generated in the metal titanium / titanium alloy through high pressure, and therefore the strength of the metal titanium / titanium alloy is improved; the defects such as holes and microcracks in the metal component can be repaired through high pressure; more dislocation, twin crystal and other strengthened defect structures can be generated in the metal part at high temperature and high pressure; high-temperature heat treatment under high pressure can eliminate residual stress and distribution of a non-uniform phase, and the ductility is improved.

The invention relates to the technical field of additive remanufacturing, and particularly discloses a laser composite additive remanufacturing process method which comprises the following steps: melting alloy powder through a laser cladding nozzle and spraying the alloy powder on a to-be-repaired surface to form a cladding layer; furthermore, volume damages in forms of corrosion holes, cracks, fractures and the like on the to-be-repaired part are repaired, and meanwhile, a laser impactor is used for carrying out laser impact strengthening on the cladding layer, so that the fatigue life strength of the cladding layer is improved. According to the device, a large amount of heat does not need to be input, then the influence on the mechanical property of an original to-be-repaired part can be reduced, laser shock strengthening is conducted on the cladding layer through the laser impactor, and the phenomena that the repaired layer is coarse in tissue dissimilation and unbalanced in residual stress distribution of the cladding layer are avoided.