319 results about "Peening" patented technology

The invention discloses a thin-wall stainless steel pipe welding seam polishing device, and belongs to the technical field of metal processing machine tools, the thin-wall stainless steel pipe welding seam polishing device comprises a main shaft, a through hole used for containing a thin-wall steel pipe to be polished is formed in the middle of the main shaft, a clamping groove is formed in the circumferential side wall of the through hole, and an electromagnetic strip is movably embedded in the clamping groove; and the ejector rod is coaxially opposite to the through hole and is driven by an ejector rod sliding table to be horizontally close to or far away from the main shaft. By means of the highly-integrated dual-mode power relay part, integration and rapid lossless switching of the grinding function and the ultrasonic peening function are achieved, the two working procedures are combined into one, the production efficiency is greatly improved, and positioning errors caused by multiple times of clamping are avoided.

The invention provides a method for automatically detecting the coverage rate of a blade part after shot blasting, which realizes objective evaluation and screening of the surface coverage rate of the part based on an intelligent platform, and comprises the following steps: S1, establishing a database for comparison through sample coverage rate calibration; s2, performing shot blasting treatment on the part to form a to-be-detected surface; s3, the part subjected to shot blasting treatment is fixedly arranged in a designated area and transferred to a detection platform; s4, carrying out image acquisition on the shot blasting area of the part by adopting intelligent visual equipment; s5, comparing the acquired image with a calibration picture in a database through image analysis software, and judging a coverage rate value of the part; and S6, re-checking and post-processing the judgment result, and screening out qualified parts. According to the method, the roughness of parts such as blades after shot blasting can be quantitatively detected, and the coverage condition of the parts after surface treatment can be more objectively judged; the detection efficiency can be improved, and the problem of missing detection can be effectively avoided.

The invention provides a shot peening process parameter optimization and generation method and device, equipment and a storage medium. The shot peening process parameter optimization method of a thin-wall component comprises the steps that initial state data of the thin-wall component is obtained; generating a multilayer constitutive model; initial shot blasting process parameters are obtained; a geometric model after shot blasting and residual stress distribution data after shot blasting are predicted through shot blasting simulation; shot blasting forming efficiency is obtained according to the initial shot blasting process parameters; the residual stress gradient uniformity is obtained according to the residual stress distribution data after shot blasting; and optimal shot blasting process parameters are obtained through multi-objective optimization. According to the shot peening process parameter optimization and generation method and device, the equipment and the storage medium, the shot peening forming efficiency and the stress distribution uniformity can be both considered.

The invention relates to the technical field of shot blasting protection, in particular to an aperture-adjustable shot blasting modular protection device and method, which comprises a double-end threaded pull rod, a variable-diameter supporting mechanism positioned on the double-end threaded pull rod, blocking pieces positioned at two ends of the variable-diameter supporting mechanism, and an adjusting piece in threaded connection with the double-end threaded pull rod, the variable-diameter supporting mechanism is used for supporting the inner wall of a hole, and rotation of the adjusting piece is used for adjusting the supporting range of the variable-diameter supporting mechanism. The blocking pieces are detachably connected to the two ends of the variable-diameter supporting mechanism and used for blocking the opening portion of the hole. The variable-diameter supporting mechanism is driven by the adjusting piece to adapt to different hole diameters, various hole types are compatible and adapted, the universality of the protection equipment is greatly improved, and the cost is reduced; disassembly and assembly are convenient and efficient, shot blasting operation auxiliary time is shortened, and machining efficiency is improved; the modular design facilitates independent replacement of damaged parts, the maintenance cost is reduced, and the service life of the device is prolonged.

The invention relates to the field of laser processing, and particularly discloses a fillet structure laser shock peening residual stress control method based on energy compensation, which comprises the following steps: accurately measuring and quantifying residual stress fluctuation and a tensile stress area caused at a fillet in the prior art, and setting a peening target according to the residual stress fluctuation and the tensile stress area; laser parameters and geometric parameters are systematically identified, and a database covering the combination of the laser parameters, the geometric parameters and material parameters and corresponding residual stress results is constructed through experiments and simulation; and based on the constructed database, establishing a relationship between parameters and stress, and obtaining a simplified empirical formula for laser energy compensation from the relationship. The energy control formula extracted by the control method can accurately guide processing parameters with different geometrical characteristics, so that the uniformity of residual stress distribution is fundamentally ensured, and harmful tensile stress at the fillet is effectively eliminated. Through accurate control of an empirical formula, raw materials and working hours consumed by repeated trial and error in a traditional process are avoided.

The invention belongs to a part surface treatment technology, and relates to an actuator cylinder inner surface ultrasonic impact strengthening device and a use method thereof. Comprising an actuator cylinder upper cover plate (1), an actuator cylinder supporting table (2), an ultrasonic vibration head fastening screw (3), an ultrasonic impact device, an ultrasonic vibration head supporting platform (6), an ultrasonic working rotary table (8), a vertical lifting working table (9) and an ultrasonic strengthening working table base (10). According to the method, only a small amount of shots are consumed and are far less than traditional shot peening strengthening, the machining cost is lower, the dust amount is smaller, and noise is lower. In the strengthening process, a tool and actuator cylinder parts do not need to be moved, all the inner surfaces of the actuator cylinders are strengthened only through rotation of the ultrasonic working rotary table and lifting of the vertical lifting working table, high positioning precision is achieved, and the machining efficiency is remarkably improved.

The invention relates to the field of foundation detection, in particular to an impact-controllable foundation strength detection device and method for building construction, and the device comprises a steel chisel main body, an annular transmission block, a piercing hammer and a coaxial release mechanism; the coaxial releasing mechanism comprises a coaxial connecting ring, a plurality of force applying structures and a buffering assembly, the coaxial connecting ring is coaxially connected with the steel chisel body, a plurality of lifting lugs are arranged on the coaxial connecting ring at equal intervals, the force applying structures are arranged on the lifting lugs correspondingly, the force applying structures are used for applying radial acting force to the piercing hammer, and the buffering assembly is used for buffering the piercing hammer. The acting force applied to the piercing hammer by the force application structures is the same in magnitude, and the buffer assembly is connected with the coaxial connecting ring and the steel chisel body and used for reducing vibration borne by the coaxial connecting ring. The steel chisel is provided with the steel chisel body, the piercing hammer and the coaxial release mechanism, so that energy loss caused by eccentricity or contact friction of the piercing hammer is avoided, and the impact amount of the piercing hammer is precisely controllable.

The invention relates to the field of laser shock peening, and particularly discloses a laser shock peening black adhesive tape damage monitoring method based on sound signals, which comprises the following steps: collecting laser shock discrete sound signals, obtaining a discrete sound signal sequence, and carrying out Hilbert envelope extraction on the discrete sound signal sequence to obtain envelope signals; performing weighting processing on the extracted envelope signal to obtain a weighted envelope, and constructing a loudness index based on the weighted envelope; short-time window frequency analysis is adopted, a dominant frequency sequence with the dominant frequency changing along with time is extracted, and the dominant frequency stability offset is calculated according to the dominant frequency sequence; and constructing a loudness-frequency coupling damage scoring criterion, and calculating a damage score. According to the method, the damage identification sensitivity is remarkably improved, the real-time online monitoring of the laser shock process is realized, the environmental adaptability is high, the engineering deployment is simple and convenient, the consistency of the laser shock peening quality is remarkably improved, and meanwhile, the method has good expandability and universality.

The invention discloses a device and method for monitoring the state of a laser shock peening absorption layer, and relates to the technical field of surface strengthening, and the device comprises a visual image sensor array, an image preprocessing module, an image analysis module and a state evaluation module. The visual image sensor array is used for acquiring visible spectrum images and near-infrared band images of a laser shock peening processing area from multiple angles; the image pre-processing module is used for pre-processing the acquired images to obtain pre-processed images at different angles; the image analysis module is deployed with an image recognition model based on a ResNet-UNet hybrid architecture and an attention mechanism, and is used for recognizing the preprocessed image to obtain an image analysis result; and the state evaluation module is used for evaluating by adopting a multi-threshold judgment mechanism according to the image analysis result to obtain an evaluation result. The state change of the absorption layer in the laser shock peening process can be monitored in real time, the damage condition can be found in time, and the stability and consistency of laser shock peening machining are effectively improved.

The present invention relates to the field of laser processing technologies for sports equipment, and specifically to a method for laser shock peening of an ice skate blade edge. The method includes the following steps: providing an ice skate blade substrate; applying an absorption layer to the blade edge of the ice skate blade substrate, wherein the absorption layer forms a rounded R-angle transition over the chamfered area of the blade edge; performing laser shock peening treatment on the blade edge coated with the absorption layer, with the laser for laser shock peening directly incident in the normal direction; performing further laser shock peening treatment on the chamfered area of the blade edge coated with the absorption layer with the laser normal to the R-angle area, using an optical focusing enhancement method; removing the coated absorption layer after the laser shock peening treatment. The purpose of the present invention is to solve the problem of deformation and delamination that occurs easily during the laser shock peening of an ice skate blade.

The invention discloses an electric arc additive thin-wall component strengthening and toughening method based on laser shock peening. The method comprises the following steps that a thin-wall test piece is prepared; planning an unstrengthened area and a plurality of laser shock strengthening sub-areas on the surface of the test piece; selecting a laser shock peening sub-region, selecting laser shock peening parameters for laser shock peening, and adjusting the laser shock peening parameters until the total thickness of the pore-free layer and the hardened layer meeting the target requirement is obtained, so as to obtain optimized laser shock peening parameters; and selecting a plurality of laser shock peening sub-regions, performing peening by adopting optimized laser shock peening, selecting annealing parameters for annealing treatment, and repeating the annealing parameter adjustment operation until the total thickness of the pore-free layer and the hardened layer meeting the target requirement is obtained, so as to obtain optimized annealing parameters. According to the method, the pore-free layer and the hardened layer with reasonable thicknesses are generated on the surface of the additive aluminum alloy thin-wall part, the near-surface layer strength of the thin-wall part is improved, and the strength and plasticity of the arc additive aluminum alloy thin-wall part are improved at the same time.

The invention provides composite laser shock peening equipment and a turbine blade laser shock peening method. The composite laser shock peening equipment comprises a first laser, a second laser, a third laser and a fourth laser, wherein the first laser outputs large-energy laser shock with single pulse energy larger than 1J to a first target area; the second laser outputs small-energy laser shock with single pulse energy at dozens of to hundreds of mJ levels to a second target area; the movement system is used for clamping and moving the to-be-machined part to the first target area or the second target area; the water restraint loading system is used for applying a water restraint layer; and the control system is used for adjusting working parameters of the modules. The invention further provides a turbine blade composite laser shock peening method implemented through the equipment, and the problem that double requirements of improvement of deep residual compressive stress and improvement of high surface residual compressive stress cannot be considered in a single process mode is solved through a large-energy and small-energy composite laser shock peening process.

The present application relates to the technical field of complex shape remanufacturing, in particular to a complex shape remanufacturing method and material for a desulfurization circulating pump impeller, the complex shape remanufacturing method comprising constructing a multi-modal damage intelligent mapping; synchronously preparing plasma activation and micro-texture; performing energy field coupling cladding repair; performing stress field balance shot peening strengthening; implementing gradient coating self-propagating synthesis; performing thermal-mechanical coupling precision shaping; performing micro-gap pressure infiltration sealing; and performing multi-physical field service simulation verification. The present application can significantly prolong the service cycle of key components, comprehensively enhance the comprehensive performance of anti-cavitation and erosion resistance, establish a digital twin closed loop of damage diagnosis, repair optimization and life prediction, and simultaneously realize life cycle cost control and resource saving. Not only can the present application repair failed components, but also can it rebuild a sustainable operation system.

A method for coating a component of a gas turbine engine includes providing the component having a bond coat and contaminants on a surface of the bond coat; laser treating the surface to remove the contaminants and to produce a cleaned surface on the bond coat; peening the cleaned surface to produce a peened surface on the bond coat, and applying a ceramic coat to the peened surface.

The invention is applicable to the field of laser strengthening, and provides a laser strengthening method for regulating and controlling the surface performance of an additive part of a combustion chamber, which comprises the following steps: S1, pretreatment: sequentially performing stress relief annealing, surface cleaning, cleaning and drying on a metal part of the additive combustion chamber; s2, coating-free laser shock peening is conducted, specifically, the pretreated part is fixed to a five-axis workbench through a special clamp to be positioned, and Nd: YAG or Nd: YLF pulse laser is adopted for shock according to a path planned by a three-dimensional CAD model; s3, post-treatment and performance verification are conducted, specifically, after the part is cleaned, the surface appearance, roughness, residual stress and microhardness are detected, and a microstructure is observed; according to the method, the coating procedure of traditional laser shock is omitted, the pollution risk is eliminated, the surface roughness is synchronously reduced, the deep residual compressive stress is introduced, the microhardness is improved, the fatigue resistance of the combustion chamber component is remarkably improved, and the method is suitable for materials such as nickel-based high-temperature alloy and cobalt-based high-temperature alloy and components of complex structures.

A method for manufacturing high-strength, hydrogen-embrittlement-resistant bolts based on microsphere shot peening, and the bolts themselves, are disclosed. The manufacturing method includes: S1, cold heading and thread rolling of alloy structural steel billets to obtain bolt forming parts; S2, surface cleaning of the bolt forming parts, followed by overall surface peening with microspheres driven by high-pressure air; after overall peening, targeted strengthening peening treatment is performed on stress concentration areas such as thread roots, undercut grooves, and flange transition corners to obtain reinforced bolt parts; S3, the reinforced bolt parts are cleaned, dried, and phosphated to obtain finished bolt parts. This design, through a "overall + targeted" composite microsphere shot peening strategy, introduces a uniform residual compressive stress field and a micron-level fine-grained plastic deformation layer on the bolt surface, forming a thicker strengthening layer in stress concentration areas, significantly improving the fatigue strength and delayed fracture resistance of high-strength bolts, while ensuring uniform surface roughness and stable assembly friction coefficient.

The invention discloses a high-durability mask system and an application method of the high-durability mask system in mechanical shot peening selective area strengthening, and belongs to the technical field of surface engineering. The invention provides a mask design of a multi-layer composite structure, a precise positioning and fixing system and a special process parameter system. The mask plate adopts a composite structure of the matrix layer, the wear-resistant layer and the anti-fatigue layer, so that the shock resistance and the wear resistance of the mask plate are improved; the positioning system is beneficial to keeping the stability and the repeated positioning precision of the mask plate under the working condition of strong vibration; and the special process parameters are matched and optimized aiming at the application scene of the mask plate. The invention aims to improve key technical problems when a mask shielding method is applied to a mechanical shot peening process, improve the precision and efficiency of selective shot peening strengthening, reduce the comprehensive manufacturing cost, and enable the service life of a mask system and the boundary precision of a selective strengthening region to be generally superior to those of a traditional scheme. And the method has a certain economic advantage while the fatigue performance is improved.

The present application relates to the technical field of high-temperature oxidation-resistant coating, and particularly relates to a modified NiCoCrAlYTa bonding layer and a preparation method thereof.The present application adopts low-pressure plasma gas spraying to prepare a NiCoCrAlYTa bonding layer on the surface of a high-temperature alloy substrate, then performs shot peening treatment to reduce the surface roughness of the coating, then performs Al-Cr co-diffusion, and forms a co-diffusion bonding layer with an outer Al-rich layer, an intermediate Cr-rich layer and an inner NiCoCrAlYTa layer, finally performs vacuum pre-oxidation to form a TGO layer on the surface of the co-diffusion bonding layer, thereby obtaining the modified NiCoCrAlYTa bonding layer.The modified NiCoCrAlYTa bonding layer prepared by the present application has excellent high-temperature oxidation resistance and corrosion resistance, and can realize long-time service.

The invention discloses a fatigue crack propagation life prediction method for a laser shock peening titanium alloy lug, and belongs to the technical field of fatigue crack propagation life prediction of a metal structure, and the method comprises the following steps: carrying out laser shock peening on a target lug structure, and testing to obtain a residual stress field of the target lug structure after laser shock peening; carrying out a fatigue test by adopting an identification load method, and interpreting a fracture; stress intensity factors caused by external loads and residual stress of all points of the front edge on the marking line are calculated in finite element numerical simulation software; correcting the fatigue crack growth rate model; calculating a crack propagation amount corresponding to each point of the preset crack front edge based on the fatigue crack propagation rate model, fitting to obtain a new crack front edge, and recording a corresponding cycle index; and calculating to obtain the fatigue crack propagation life. By adopting the method, accurate prediction of the three-dimensional fatigue crack propagation life under the action of the laser shock peening residual compressive stress field is realized.

A processor (213) carries out, after a device is activated and before a blasting medium projected to a projection target object (500), a first inspection process (T1) for determining, in a state in which no blasting medium (400) is supplied to an impeller (110) while each motor of the impeller is rotating, whether a current value supplied to the each motor of the impeller is not more than a first threshold (θ1), and a second inspection process (T′1) for determining, in a state in which the impeller is projecting the blasting medium, whether the current value supplied to the each motor of the impeller is not less than a second threshold (θ2), and displays, on a display (300), at least one of (1) respective determination results of the first inspection process and the second inspection process and (2) a determination result obtained by generalizing the determination results (1).

The invention relates to the technical field of shot blasting equipment, in particular to an anti-blocking shot blasting machine which comprises a pressure tank, one end of a material spraying hose is connected to the bottom of the pressure tank, a spray gun is mounted at the other end of the material spraying hose, and an anti-blocking device is arranged on one side of the pressure tank. And the anti-blocking device is used for automatically and completely discharging the residual spray material in the spray hose out of the spray hose after the shot blasting machine stops, so that the spray hose is prevented from being blocked by the spray material accumulation. A pipeline is additionally connected to the connecting position of the material spraying hose and the pressure tank to be connected with the energy accumulator, when the shot blasting machine is started, the air compressor can input air into the energy accumulator for energy storage, and after the shot blasting machine is closed, the energy accumulator can input the air in the energy accumulator into the material spraying hose, so that the energy storage effect is improved. The problems that after a shot blasting machine is shut down, part of spraying materials in a spraying hose cannot be discharged out of the spraying hose due to insufficient air pressure, so that the spraying materials are accumulated in the spraying hose, and the spraying hose is blocked are solved.

The invention discloses an integrated multi-beam device and method for aircraft part laser preheating, polishing and strengthening, and the device comprises a computer control system, a laser preheating device, a picosecond pulse laser device, an ultra-strong pulse laser device and a workbench, wherein the computer control system is used for controlling the movement of the laser preheating device, the ultra-strong pulse laser device, the picosecond pulse device and the workbench; the laser preheating device is used for focusing large-light-spot continuous laser beams on the surface of the aircraft part loaded on the surface of the workbench, and preheating of the surface of the aircraft part is achieved. The picosecond pulse device is used for forming small light spots which are focused on the preheated surface of the aircraft part to polish the surface of the aircraft part; the ultra-strong pulse laser device is used for forming high-energy small light spots which are focused on the polished surface of the aircraft part, and laser shock peening of the surface of the aircraft part is achieved. The machining efficiency and precision of aircraft parts can be effectively improved, and the manufacturing cost is reduced.

The invention relates to the technical field of surface strengthening of aeronautical parts, in particular to a shot peening strengthening machining device and method for an internal thread structure of an aeronautical part, and the device comprises a shot peening cover plate, a shot peening gasket, a shot peening plug and other components; the shot-blasting gasket is arranged on the upper end face of the shot-blasting part, the shot-blasting cover plate is arranged on the outer edge of the shot-blasting gasket, a through hole for a spray gun to pass through is formed in the shot-blasting gasket, one end of the rod is connected with the shot-blasting cover plate, and the other end of the rod is connected with a shot-blasting machine workbench; the shot blasting base is installed on a shot blasting machine workbench, the shot blasting plug is installed in a shot blasting part, the shot blasting outer cover is connected with the shot blasting cover plate and installed on the shot blasting machine workbench, and the shot blasting device has the advantages of being good in protection effect, short in remodeling adjustment time and long in service life and can meet the requirement for a multi-variety and small-batch production mode of aeronautical parts. The shot peening strengthening processing method has the characteristics of good shot peening strengthening uniformity, high processing efficiency, wide engineering applicability and stable and reliable quality, and ensures timely delivery of aviation products.

The invention belongs to the technical field of chains, and particularly relates to a precise chain roller with a smooth surface and abrasion resistance and a preparation method thereof. The invention provides a steel roller which is provided with a DLC final working surface on an excircle mirror surface, an excircle has no texture, and only an inner hole is provided with a micron-sized spiral microgroove. The process is implemented according to the sequence of carburizing / quenching / tempering-shot blasting-fine grinding-superfinishing-vacuum PVD, a diamond-like carbon composite coating is formed on an outer circle, and oil storage and capillary pumping are carried out through control of an outer edge fillet, residual compressive stress and DLC adhesive force and an inner hole microgroove, so that work division of antifriction bearing and oil supply functions is realized. A chain provided with the anti-abrasion precision roller with the smooth surface gives consideration to low friction, low noise and stripping resistance under the boundary lubrication and impact-rolling composite working conditions.

The utility model provides an Almen test piece batch shot blasting processing clamping positioning device, which comprises a base disc, a pin rod, a positioning plate and a supporting device, the supporting device comprises a bottom plate and a top plate, the top plate is fixedly connected with the base disc, the bottom plate is fixedly connected with a working table of a machine tool, a first center hole is arranged on the surface of the base disc, and second center holes are arranged on the surfaces of the bottom plate and the top plate. The workbench of the machine tool is further provided with a datum hole, the first center hole, the second center hole and the datum hole are connected together in series through the pin rod, the surface of the base disc is further provided with a guide groove, the guide groove is communicated with the first center hole, the length direction of the guide groove is consistent with the radial direction of the first center hole, and one end of the positioning plate is fixedly connected to a groove opening of the guide groove. And the other end of the positioning plate is used for supporting the Almen test piece. By the adoption of the technical scheme, a plurality of Almen test pieces can be clamped on the surface of the base disc at a time, the clamping and positioning precision of the Almen test pieces on the clamp is improved, and shot blasting treatment results of the Almen test pieces in the same batch are kept highly consistent.

The invention relates to a laser etching metal model establishing method considering short pulse laser shock peening. The method comprises the steps that thermal ablation and molten pool dynamics are coupled to establish a physical field of a laser etching part; a shock wave pressure model and a material constitutive model are introduced into the physical field of the laser etching part, and a multi-physical-field transient model is established; performing multi-objective optimization on the multi-physical field transient model, and replacing model parameters in the original model with optimized model parameters; by establishing a multi-physical field transient model coupling ablation and shock wave effects, synchronous and high-precision simulation of the laser shock peening effect in the process of etching the microgroove in the metal surface by short-pulse laser is realized; the limitation that shape control machining and performance strengthening are mutually separated in traditional simulation is overcome; understanding of an internal strengthening mechanism in the laser etching process is deepened, and an efficient digital design and prediction tool is provided for integrated process optimization of microgroove high-quality shape control and substrate fatigue performance improvement.

1. Name of the designed product: Laser processing equipment (3.0). 2. Use of the designed product: The designed product is used for laser shock peening processing. 3. Design points of the designed product: Combination of shape and pattern. 4. Picture or photo best indicating the design points: Fig. 1.

The application provides a method for physical vapor deposition assisted laser shock fatigue strengthening, comprising the following steps: firstly, depositing a metal film on the surface of a substrate by a physical vapor deposition method; secondly, applying a laser shock technology to the surface of the substrate coated with the metal film; and finally, removing the metal film deposited on the surface of the substrate. The metal film formed by the physical vapor deposition is weakly combined with the substrate, which can prevent the cracks in the laser shock or ablation from continuing to evolve and develop inside the material to be strengthened and from expanding to the interlayer cracks of the composite material, and effectively improve the fatigue strength of the material. In addition, the metal film can also be beneficial to the conduction of impact force, heat and other effects; as a sacrificial layer, the metal film can be closely attached to the substrate and will not peel off randomly during the impact process. The application combines the physical deposition and the laser shock technology, widens the application scenarios of the laser shock, breaks through the material limitation of the traditional laser shock, prevents the crack evolution and development, improves the fatigue strength, and has a wide popularization and application prospect.

This invention relates to a wear-resistant, long-life shot peening agent. The shot peening agent, by mass percentage, comprises: C: 0.55-1.0%, Si: 0.25-0.65%, Mn: 5.8-10.5%, Cr: 3.0-7.0%, Ni: 5.6-8.4%, B: 0.0015-0.004%, P: less than 0.05%, S: less than 0.03%, with the balance being Fe and unavoidable impurities. The shot peening agent is prepared by water atomization or gas atomization of molten steel with the above composition. The shot peening agent is then heated to 820-900℃ and held, followed by quenching to room temperature at a quenching cooling rate of V1≤V≤V2. The unit is ℃ / s, where: V1=8.58*ln(103.8-11.27*[B]-5.78*[Mn]-3.16*[Cr]-1.88*[Si]-1.05*[Ni]-2.14*[C])+13.7; V2=37.5+3018*[B]-1.5*[Mn]+5.4*[Cr]-2.1*[Ni]-6.2*[Si]+37.9*[C]; where [C], [Si], [Mn], [Cr], [Ni], and [B] represent the mass percentage content of C, Si, Mn, Cr, Ni, and B, respectively.

The invention belongs to the technical field of material surface treatment, and provides a TC4 alloy surface treatment method based on laser shock peening and laser metal deposition, and the method comprises two parts of preparation of a TC4 alloy material test piece and laser shock peening of the formed test piece. According to the surface treatment method for preparing the TC4 alloy material based on selective laser deposition, various properties of the surface of the TC4 alloy are improved in the mode of regulating and controlling the laser power density, the problem that residual stress is generated in the material in the process of preparing the TC4 alloy through laser metal deposition is solved in the mode of laser shock peening, and the quality of the TC4 alloy material is improved. Compared with the prior art, the method has the advantages that various properties of the material surface can be improved, residual tensile stress on the surface of a part can be reduced through plastic deformation generated in the impact process, the deformation resistance of a test piece is improved, and initiation, expansion and cracking of cracks of the part are inhibited.