234 results about "Stress control" patented technology

The invention discloses a brittle material laser cutting thermal stress control method and system, and the method comprises the steps: obtaining real-time temperature distribution through infrared thermal imaging, combining finite element analysis and material characteristic dynamic data, constructing a thermal stress and fracture relation model, carrying out the iterative calculation of a thermal stress out-of-control threshold through a lambda algorithm, and determining a regulation boundary condition. According to the boundary condition, laser parameters are optimized, synchronous cooling airflow is introduced, the temperature gradient is dynamically controlled through an airflow pressure adjusting algorithm, historical data are processed through a convolutional neural network, the optimal laser parameter combination is predicted, in the cutting process, the microcrack diffusion state is monitored in real time, and auxiliary technological parameters are finely adjusted when necessary. The problem of fracture caused by out-of-control thermal stress in laser cutting of the brittle material is effectively solved, the cutting quality and efficiency are improved, and a new technical scheme is provided for precision machining of the brittle material.

The invention relates to the technical field of beam bridge splicing, in particular to a large-span concrete continuous beam bridge splicing construction method based on intelligent construction. The method comprises the following steps: acquiring digital modeling data of a left bridge and a right bridge to be spliced; analyzing the digital modeling data, and determining the dynamic stress distribution of the whole construction process; acquiring deformation monitoring data in real time, analyzing the deformation monitoring data, and determining a coordinated deformation rule of the left and right bridges; and generating a splicing construction scheme according to the dynamic stress distribution and the coordinated deformation rule. And the decoupling problem of a digital model and a physical entity is eliminated. The problem of stress control blind areas is solved, stress space-time evolution is quantified, it is ensured that stress prediction covers all stages of construction, and the blind areas of a conventional static model are avoided. The problem of quantitative deficiency of the coordination deformation rule is solved, and the defect of neglecting the deformation coordination is avoided. The problem of construction decision lag is solved, the structural damage probability and temperature cracks are reduced, and coupling of construction execution and a physical mechanism is ensured.

The invention discloses an oxide thin film post-processing method based on multi-stage cooling annealing, and aims to actively regulate and control thin film stress while repairing oxygen vacancies through a precisely designed heat treatment process. According to the method, the problem that stress control and defect repair are difficult to consider in the annealing process is solved, and a solid theoretical basis and scientific basis are laid for preparing low-absorption and high-stability oxide intense laser thin film devices.

Embodiments of the present disclosure include methods and apparatus for depositing a plurality of layers on a large area substrate. In one embodiment, a processing chamber for plasma deposition is provided. The processing chamber includes a showerhead and a substrate support assembly. The showerhead is coupled to an RF power source and a ground and includes a plurality of perforated gas diffusion members. A plurality of plasma applicators is disposed within the showerhead, wherein one plasma applicator of the plurality of plasma applicators corresponds to one of the plurality of perforated gas diffusion members. Further, a DC bias power source is coupled to a substrate support assembly.

The invention discloses an aero-engine blade laser shock remanufacturing method based on digital twinning, and belongs to the field of deep transfer learning, and the method comprises the steps: collecting cutting force, vibration, temperature and other multi-modal data for the non-uniform stress distribution caused by tool wear, and constructing a monitoring system; and feature alignment is performed on different working condition data by using a maximum mean difference method, a wear diagnosis and stress prediction model is constructed in combination with deep transfer learning, and a stress concentration area is identified. And laser shock strengthening remanufacturing is implemented in a stress concentration area, shock parameters are optimized, a small sample data set is expanded in combination with an adversarial generative network, and the remanufacturing adaptability is improved. Incremental transfer learning is adopted, the model is dynamically adjusted based on a freezing-fine adjustment mechanism, and rapid optimization under the new working condition is achieved. The blade residual stress control precision and the machining stability are improved by firstly monitoring tool wear and stress distribution, then implementing laser shock peening and optimizing a remanufacturing strategy in combination with incremental transfer learning.

The invention belongs to the technical field of ultra-precision machining, and discloses a micro-fluidic chip based on the electroosmosis effect and a stress regulation and control method thereof.The micro-fluidic chip is internally provided with a plurality of solution channels, each solution channel is of a snakelike reciprocating structure, one end of each solution channel is provided with a channel inlet, and the other end of each solution channel is provided with a channel outlet; a plurality of inflection points arranged at intervals are arranged on one side, facing the bottom of the micro-fluidic chip, of the solution channel, the inflection points are close to the bottom of the micro-fluidic chip and are distributed on the micro-fluidic chip in the horizontal direction, and an electrode is further arranged on the solution channel. The electroosmosis effect and the microfluidic technology are combined, high-precision dynamic stress regulation and control are achieved through gradient flow channel design, a composite driving liquid formula and a hysteresis compensation algorithm, and the problems that pressure control response is delayed and precision is insufficient in a traditional polishing technology are solved; and a new technical approach is provided for ultra-precision machining of the large-aperture optical element for the inertial confinement nuclear fusion device.

The invention provides an intelligent fatigue life prediction method based on deep learning, and belongs to the field of fatigue life prediction. The method comprises the following steps: acquiring a data set containing failure cycle times and mechanical properties of various alloy metals under different loading paths under stress control, and preprocessing the acquired data set; constructing a fatigue life estimation deep learning model, and training the fatigue life estimation deep learning model by using the preprocessed data set; and performing fatigue life prediction by using the trained fatigue life estimation deep learning model. According to the method, the problems that a traditional empirical formula is large in error and is only suitable for specific materials, loading history or load states when used for predicting the fatigue life are solved, and high-precision life prediction under multiple materials and multiple working conditions is achieved through the deep learning model.

The invention belongs to the technical field of welding stress control, and discloses an inner floating disc splicing stress parameter optimization method and system. Real-time working condition information such as the construction stage, the accumulated stress level, the overall structure rigidity and field environment parameters is combined with a dynamic adjustment mechanism of a stress optimization priority set; therefore, the problem that global optimization control is difficult to realize under multi-target conflict, construction stage evolution, cumulative stress change and field environment disturbance is solved, and the effect of realizing continuous balance and global optimization control among the targets in the whole construction period is achieved.

The invention relates to the technical field of structural design of hydraulic structures, and particularly discloses a method, a system and a terminal for determining a combined lining of a high-pressure water delivery tunnel. In the establishment process of a numerical calculation model of the combined lining, a composite drainage plate is equivalent to a uniform isotropic entity medium with the thickness of d; the mechanical property of the composite drainage plate is represented by adopting a comprehensive elastic modulus E, the structural stress of the composite drainage plate and the water pressure bearing ratio in the steel pipe are restrained through a steel pipe allowable stress control threshold value, a pipe piece crack resistance allowable stress control threshold value and a steel pipe bearing ratio control threshold value, and finally the d / E value range of the composite drainage plate is determined. Through the mode, a scientific and clear basis is provided for the value of the composite drainage d / E in the combined lining, the problem that the value is obtained depending on experience at the present stage is solved, and the subjectivity of manual selection is avoided.

According to the machining method and system for the stainless steel rectangular groove plate, the material thickness and elastic modulus parameters of a 316L stainless steel thin plate are obtained, the stress distribution state in the machining process is monitored in real time through a sensor, and if the stress value exceeds a preset threshold value, the cutting force and machining speed parameters are adjusted; a support vector machine algorithm is adopted to analyze the nonlinear relation between the material thickness and the elastic deformation, and an optimized mechanical parameter control model is obtained; according to stress control data output by the mechanical parameter control model, the machining temperature and vibration frequency information of a contact area of a tool and a workpiece is obtained, if the vibration frequency exceeds a stable machining range, the rotating speed and the feeding amount of a spindle are adjusted in real time, and the influence of thermal deformation on the groove depth precision is corrected through a temperature compensation algorithm; and determining a dynamic processing parameter combination adapted to the characteristics of the thin plate. Intelligent control over the thin plate precision machining process is achieved, and the machining precision and efficiency are effectively improved.

The invention discloses a stress control-oriented film coating process regulation and control method and system, and relates to the technical field of film coating process.The method comprises the steps of constructing a film coating task vector according to substrate feature information and film coating demand information of a lens to be coated, and conducting global credible search to obtain a film coating control scheme; introducing a stress-induced risk prediction architecture to carry out risk analysis; if the stress induction risk sequence does not meet the induction risk constraint sequence, establishing a coating optimization guide space; adjusting the coating control scheme, establishing a first coating adjustment space, performing induction risk optimization, and establishing a second coating adjustment space; and determining a coating regulation and control optimization strategy, and carrying out coating regulation and control on the to-be-coated lens. The technical problems that in the prior art, stress control of the coating process lacks global optimization capacity, optical performance and stress risks are difficult to consider at the same time, and the lens coating quality and reliability are poor are solved, and the technical effect of improving the lens coating quality and the coating process reliability is achieved.

The invention relates to the technical field of epoxy terrazzo terraces, and provides an epoxy terrazzo terrace system with a multi-layer composite anti-crack structure and a method, the epoxy terrazzo terrace system comprises a base layer, an anti-crack mortar layer, a three-layer composite anti-crack structure and an epoxy terrazzo surface layer which are sequentially arranged from bottom to top; the three-layer composite anti-cracking structure comprises an elastic resin layer, a rigid resin layer and a glass fiber cloth layer which are sequentially arranged from bottom to top. According to the epoxy terrazzo three-layer anti-crack structure based on rigid resin stress relay diffusion, the problems that an existing epoxy terrazzo system cracks frequently under the action of complex stress, the service life is short, and maintenance is frequent are effectively solved through a soft-rigid-fiber cooperative stress control mechanism.

The invention discloses a manufacturing process of a radial magnetic flux cylinder type motor iron core, and particularly relates to the technical field of motor iron core manufacturing, and the manufacturing process comprises the steps: employing magnetron sputtering to construct a gradient insulation coating on the surface of a nanocrystalline strip, and enabling the gradient insulation coating and silicon steel sheets to be alternately laminated to form a magnetic conduction-bearing composite structure; a yoke bionic honeycomb runner and a tooth magnetic barrier groove are machined through femtosecond laser, and magnetothermal coupling optimization is achieved; multidirectional progressive stamping forming is conducted in the pulsed magnetic field environment, and grain directional arrangement and interface metallurgical bonding are achieved in combination with femtosecond laser micro-connection; the integrated eddy current detection system regulates and controls press fitting parameters in real time, and stress regulation and control are completed through two-stage microwave annealing and ion beam treatment. According to the method, the magnetic circuit efficiency and the heat dissipation performance of the iron core are effectively improved, through material-structure-process collaborative innovation, the problems of magnetothermal imbalance, grain disorder, assembly accumulative errors and the like in traditional manufacturing are solved, and the operation stability and the service life reliability of the iron core under the high-frequency and high-load working condition are remarkably improved.

The invention belongs to the technical field of geotechnical engineering and rock mechanics testing, discloses a stress-strain mixed control-based rock stable failure testing method, and aims to solve the problem that a stress path cannot be maintained and brittle failure cannot be inhibited simultaneously after rock peak strength is detected in an existing true triaxial test. The method comprises the following core steps: firstly, determining a target stress state and a strain growth rate threshold value; then hydrostatic pressure loading is carried out; loading and unloading at a fixed proportional rate in a stress control mode; and when the strain rate reaches a threshold value, switching to a stress-strain hybrid control mode, converting the maximum principal stress direction into strain control to stabilize the damage process, and dynamically coordinating stresses in the other two directions based on real-time feedback to enable the whole damage process to maintain a preset stress path all the time. According to the invention, the complete and stable test of the pre-peak-post-peak mechanical behavior of the rock under any complex stress state can be realized, and a key technical support is provided for accurately verifying the strength criterion and researching the failure mechanism.

The invention provides a surrounding rock stress regulation and control method based on near-far field pressure relief. Aiming at the problem of surrounding rock instability caused by high ground stress and mining disturbance of a deep roadway, a grading response technical system is provided. Near-field regulation and control are achieved through high-strength active and passive composite supports (anchor net shotcreting and a steel tube concrete support), plastic zone form monitoring and differential pressure relief: based on dynamic monitoring of the radius of a surrounding rock plastic zone, a mining influence index K is calculated, and when 1 < = Klt; 2, a borehole pressure relief and wall back yielding layer cooperative control technology is adopted, and when a plastic zone distortion part does not change to a butterfly-shaped plastic zone, the plastic zone distortion part is induced to uniformly expand to a circle; when K is larger than or equal to 2, a far-field air cannon presplitting roof cutting technology is combined, the roof cutting technology forms a full-section crack along a weak surface of a rock body through a high-pressure gas sealing cavity, a mining-induced stress transmission path is cut off in advance, traditional static design limitation is broken through, gas presplitting is adopted for replacing blasting / hydraulic roof cutting, and zero pollution and accurate and controllable energy in the construction process are achieved; and the top cutting depth is dynamically optimized along with the K value.

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

The invention relates to a wafer-level film stress regulation and control method, module and device. The method comprises the following steps: constructing a stress regulation and control module according to set parameters and a structure, and integrating the constructed stress regulation and control module at a set position of a semiconductor device; wherein the stress regulation and control module comprises a stress regulation and control layer, and the stress regulation and control layer adopts a metal / medium composite laminated structure; in the wafer manufacturing process, a target net stress value needed by a current wafer is obtained through a manufacturing execution system, the optimal thickness proportion needed by a stress regulation and control layer for achieving the target net stress value is calculated through an internal stress prediction model, and the manufacturing execution system generates a technological formula according to the optimal thickness proportion; and the deposition equipment is driven to deposit the stress regulation and control layer under the optimal thickness ratio. By designing the independent stress regulation and control module, it can be ensured that the crystallization quality, the stoichiometric ratio and the electrical / piezoelectric performance of the functional film are not sacrificed, and linear, accurate and predictable stress control over the wafer is achieved.

According to the copper alloy strip residual stress rapid evaluation and improvement method based on stress feedback, a warping measurement value is accurately mapped into a stress gradient parameter through a deformation and stress conversion model, and the aging bottleneck of a traditional method is broken through; according to the method, a double-track regulation and control mechanism driven by a delta sigma threshold value is constructed, medium and low stress regions are passivated and homogenized by means of cerium salt grain boundaries, a high stress region is subjected to targeted shape protection by means of a cerium salt and thiomalic acid composite film, dialectical unification of stress release priority and overall etching efficiency is achieved on the molecular level, and a scientific and efficient stress management and control mode is provided for copper alloy strip manufacturing.

The invention provides a tunnel chain type rockburst risk assessment method based on rock mass structural plane characteristics, and relates to the technical field of geological exploration. Through the processes of static prediction, dynamic early warning, advanced detection, structural plane parameterization and tendency index, typed identification and directional evaluation of chain rock burst are realized. Structural surface features (position, scale, dip angle and included angle) are taken as a core, a stress control type and a structural surface control type are firstly distinguished, then the occurrence risk of strain-structural surface slippage type rockburst and chain type rockburst is judged, and axial chain type rockburst, radial chain type rockburst and axial-radial chain type rockburst are further identified according to the included angle between a structural surface and a tunnel axis and the dip angle of the structural surface. According to the method, multiple chain type rockburst modes can be identified and evaluated at the same time, the limitation that in the prior art, only single-time rockburst can be evaluated or only one specific type of chain type rockburst is limited is made up, and a scientific basis is provided for forepoling and dynamic construction management.

The present invention relates to high-voltage power cable connection accessories, and discloses a prefabricated fused stress cone and a manufacturing process. It can be prefabricated in advance, can be cross-linked with the cable to form an integral body, effectively eliminates the micro-air gaps between the stress cone and the cable insulation layer and prevents polarization, and effectively improves the electrical performance stability and power transmission safety during cable power transmission. The present invention includes the following steps: manufacturing a stress control body, manufacturing a stress control body in a conical shape; manufacturing a fused stress cone, placing the stress control body in a first composite mold, injecting non-crosslinked polyethylene raw material into the first composite mold, the non-crosslinked polyethylene raw material passes through the stress control body, through heating and extrusion, the non-crosslinked polyethylene raw material forms a stress cone insulator, after cooling, the stress control body is sleeved on the outer wall of the stress cone insulator, and the stress control body and the stress cone insulator are melt-grafted and cross-linked to combine, forming a fused stress cone with an integral welding structure.

The present application relates to the field of testing and numerical analysis control technology, and in particular to a simulation method, apparatus, equipment, medium, and program for a true triaxial test. The method comprises: obtaining a test target for the true triaxial test; determining a specimen based on the test target and applying a preset axial strain increment to the specimen; collecting the true axial stress value, the true longitudinal stress value, the true transverse stress value, and the axial strain of the specimen; identifying a stress control target and a drainage control target within the test target, calculating a transverse stress target based on the true longitudinal stress value and the true axial stress value, generating a strain control matrix based on the stress control target, the drainage control target, the true axial stress value, the true longitudinal stress value, and the axial strain; and controlling the specimen to apply strain increments in three directions based on the strain control matrix to obtain simulation results of the true triaxial test. This method solves the problem in related arts that the simulation model for true triaxial testing cannot meet the requirements of various drainage conditions, resulting in low applicability and practicality.

The invention discloses a packaging structure and a forming method thereof. The packaging structure comprises a first rewiring structure, a second rewiring structure and a third rewiring structure, wherein the first rewiring structure comprises a dielectric layer and functional wires located in the dielectric layer; the functional chip is arranged on the first surface, and the functional chip is electrically connected with the first rewiring structure; and the stress control structure is located in the dielectric layer at the bottom of the functional chip, and the stress control structure is electrically isolated from the functional wires. The stress control structure can counteract the warping stress caused by the difference of the coefficient of thermal expansion (CTE) of materials, the warping degree of the packaging structure is reduced, and the introduction of the stress control structure enhances the overall mechanical strength of packaging, so that the cracking and layering risks caused by the thermal mechanical stress are reduced.

The invention provides a continuous and pulse coaxial double-beam welding method for a sheet titanium alloy corner joint process, and belongs to the technical field of laser welding. According to the method, continuous laser and pulse laser are adopted, coincidence arrangement of the two laser beams in space is achieved through a coaxial composite optical system to form a composite laser beam, the composite laser beam acts on a sheet titanium alloy corner joint assembled and fixed through a corner joint clamp, and the welding process is completed. The two laser beams are similar in wavelength, optical compatibility is good, and an optical system is stable. The coaxial composite heat source has the characteristics that the energy distribution gradient can be regulated and controlled, and the heat input is accurately controlled, so that the welding heat input can be effectively reduced while the mechanical property of the joint is ensured, and the residual stress is reduced to control the welding deformation. The sheet titanium alloy corner joint obtained through the method has the advantages of being uniform in welding seam forming, little in splashing, small in deformation and the like, and the technological requirements of the aerospace field for high-quality thin-wall titanium alloy structural parts are met.

The invention belongs to the technical field of power distribution networks, and particularly relates to a cable accessory and a design and preparation method thereof. The cable accessory comprises an insulating hollow tubular part and a stress pipe, the stress pipe is arranged at at least one end part of the insulating hollow tubular part, and the stress pipe is a dielectric stress pipe; the dielectric constant stress pipe is formed by applying an auxiliary electric field to the insulating liquid silicone rubber mixture injected outside the insulating hollow tubular part for a preset period of time and then carrying out orientation arrangement. The diameter of a cable accessory can be effectively reduced through the dielectric constant stress control pipe, heat dissipation and the maximum current-carrying capacity are enhanced, meanwhile, the device is suitable for special scenes with narrow spaces, and the electric field control effect is improved.

The invention discloses a welding analysis control process of a ceramic membrane group, which relates to the technical field of membrane welding and comprises the following steps: analyzing generation of microcracks of the ceramic membrane group to find out adjustable parameters related to the microcracks in the welding process; welding the ceramic diaphragm group and the lead wire to form a terminal electrode by actively regulating and controlling the adjustable parameters; the active regulation and control of the adjustable parameters comprises the steps that the temperature rise slope of the welding temperature ranges from 0.6 DEG C / s to 1.0 DEG C / s; the cooling slope of the welding temperature ranges from 0.4 DEG C / s to 0.5 DEG C / s; the reflux time is controlled to be 90-120 s; and the cooling time is controlled to be 200-300 seconds. The area of the soldering lugs is 30%-50% of the area of the terminal electrode, and the combination area of the plurality of soldering lugs is larger than 80% of the area of the terminal electrode. By adopting the scheme, thermal stress control is taken as a core, and welding crack failure is fundamentally eliminated by optimizing a welding temperature curve and accurately controlling the welding flux amount.

The invention discloses a reasonable prestress arrangement method for a concrete cable-stayed bridge, terminal equipment and a storage medium. A main beam is divided into a plurality of sections according to a bridge type; arranging prestress in each section; and judging whether the prestressing force in each section meets the reasonable prestressing force upper limit and the reasonable prestressing force lower limit of each section or not, and if not, adjusting the prestressing force of the section which does not meet the requirement. According to the method, the girder bending moment feasible region is adopted for reasonable pre-stress arrangement, the pre-stress of the concrete cable-stayed bridge can be reasonably arranged by accurately combining standard stress control conditions and adopting a programmed means, and the design working efficiency and quality are improved.

Examples disclosed herein relate to piezoelectric devices and methods for patterning piezoelectric layers for fabricating the piezoelectric devices. The methods include disposing a bottom electrode layer on a substrate, disposing a piezoelectric layer on the bottom electrode layer on a horizontal surface, varying an electrical bias to a pedestal during deposition of the piezoelectric layer, and forming a top electrode layer with a top electrode pattern on the piezoelectric layer. The substrate is supported by the pedestal. The piezoelectric device includes a substrate, a bottom electrode layer formed on the substrate, a piezoelectric layer formed on the bottom electrode layer on the horizontal surface, and a top electrode layer formed on the piezoelectric layer. The average stress of a plurality of stresses along the horizontal surface in the piezoelectric layer is about 50 MPa to about 300 MPa.

The invention discloses a closure control belt stress control construction method for a large public steel structure building. The closure control belt stress control construction method comprises the following steps that S1, a closure control belt is arranged; s2, design and installation of closure control belt nodes; s3, a floor support plate is installed above the second connecting structure, and a section of post-cast strip is reserved on the floor support plate; s4, steel bars of the post-cast strip are arranged; s5, monitoring structural deformation and environment temperature; s6, closure construction of the closure control belt; S7, acceptance inspection of the closure control belt; and S8, concrete pouring of a floor support plate within the range of the closure control belt. The super-long scale steel structure body is divided into the multiple construction bin blocks capable of independently stretching and deforming on the plane, and the closure control belts are planned between the adjacent bin blocks, so that the problem that the structure is sensitive to temperature and prone to generating harmful stress and deformation is solved. According to the method, the bin blocks are allowed to stretch out and draw back freely in the construction period, structural internal force and deformation caused by temperature changes are remarkably reduced, and therefore the safety and durability of the structure are improved.

The present invention provides a closed-loop control system and method for plate shape during transverse variable tension stress rolling of plates and strips, which applies axial variable tension rollers to the closed-loop control system for plate shape of plates and strips, determines the composition and integration method of the transverse variable tension stress rolling technology for plates and strips and the existing closed-loop control system for plate shape, clarifies the isolation method of axial variable tension stress plate shape control from plate shape detection and tension control during coiling, and provides a solution for the application of transverse variable tension stress rolling technology. The present invention proposes a new strategy and composition for closed-loop control of transverse variable tension stress plate shape, which effectively solves the problems of narrow application range of existing plate shape control means, insufficient high-order plate shape control capability, and interference of local tensile stress control on plate shape measurement and coiling stress, and is conducive to giving full play to the control efficiency of transverse variable tension stress rolling technology on complex high-order plate shapes of high-quality plates, strips, and foils, and can effectively promote the application and implementation of transverse variable tension stress rolling technology in plate shape control of plates and strips.

The invention discloses a method for enhancing fatigue performance of a Ti175 porous titanium alloy, which comprises the following steps of: under the protection of inert atmosphere, quickly putting a sample into a central isothermal area of a tubular furnace preheated to a first target temperature, continuously heating to a second target temperature, preserving heat, converting an original structure into a double-state structure, and cooling to room temperature at a controlled cooling rate; under inert atmosphere protection, the sample is heated to a third target temperature and subjected to heat preservation, then cyclic loads within the elastic range are applied in a stress control mode, and after loading is finished, the sample is cooled to the room temperature at the controlled cooling rate; under the air or inert atmosphere, the sample is rapidly placed into a box-type furnace preheated to a fourth target temperature, the temperature continues to rise to a fifth target temperature, heat preservation is conducted for a short time, residual stress is released, a surface oxygen solid solution strengthening layer is formed, and then the sample is cooled to the room temperature at the controlled cooling rate.