66 results about "Friction stir processing" patented technology

The invention provides a stirring friction machining device and a welding, material adding and energy control method. The stirring friction machining device comprises a spinning sleeve and a rotation driving assembly, a rotating spinning screw is installed in the spinning sleeve, the rotation driving assembly drives the spinning screw to rotate through a cutter handle, and a stirring component is arranged at the bottom end of the spinning screw; the outer side of the spinning sleeve is coated with an electromagnetic resistance composite coil with adjustable current and frequency, a feeding port and / or a shredding port are / is formed in the side wall of the spinning sleeve, and variable magnetic field intensity is excited through the electromagnetic resistance composite coil according to the electromagnetic induction principle; according to the invention, accurate adjustment of heat input of a tool is realized by adjusting current in a staying starting stage, the problem that a feeding channel is blocked by hardening of materials after short staying during material adding or welding is solved, and composite stirring of metal in a deposition edge area is realized by adjusting the magnitude and frequency of the current as a dominant electromagnetic force. And meanwhile, the temperature distribution characteristics of the acting area are locally adjusted, the interface bonding strength is improved, and the residual stress of the additive component is relieved.

A method for friction stir processing of an end surface of an age-hardening aluminum alloy plate is provided, in which a solid-solution state age-hardening aluminum alloy plate is butt-joined to and clamped with a dissimilar plate to obtain a combined plate; two sides of the combined plate are respectively provided with a weld-start plate and a lead-out plate; a bottom end of a stirring head is provided with a stirring pin; a distance between the outer edge of the stirring pin and the end surface of the age-hardening aluminum alloy plate is maintained to be 0.01-5 mm; the stirring pin is rotated into the weld-start plate; the age-hardening aluminum alloy plate is subjected to friction stir processing underwater or in a liquid nitrogen cooling condition; and the processed age-hardening aluminum alloy plate is separated and subjected to aging treatment.

The invention relates to a stirring friction pretreatment method for an aluminum alloy diffusion welding grain refinement surface, which comprises the following steps: starting from edge lines of a pair of to-be-welded surfaces of an aluminum alloy to-be-welded part, respectively carrying out multi-pass continuous equidistant stirring friction processing on the pair of to-be-welded surfaces, and ensuring that the translation overlapping rate of a stirring needle track between passes is 25-50%; during friction stir processing, water is continuously added for cooling, so that a spiral deformed fine grain layer with the grain size of 50-80 microns and the thickness of 1-2 mm is generated on a pair of to-be-welded surfaces at the position of a columnar stirring needle; and milling the pair of surfaces to be welded after the stirring friction processing is completed until the roughness is Ra 0.1-Ra 0.3, so as to obtain the aluminum alloy diffusion welding grain refinement surface. Compared with a welding seam obtained through a direct diffusion welding method, the welding seam obtained through the method has the higher welding rate and the higher strength, a new thought is provided for production and manufacturing of aluminum alloy, and the method has important significance in improving performance indexes and enhancing service reliability.

According to the metal stirring friction additive manufacturing technology and the component for controlling the precipitated phase through full-process deep cooling, in the technology, full-process deep cooling control in the aluminum alloy metal bar machining process is kept, the aluminum alloy metal bar is in a supersaturated solid solution state all the time, and therefore the precipitation phase is controlled; a temperature control system is directly applied through a stirring friction solid-phase additive stirring main shaft system, and stirring friction additive machining of metal bars is achieved under the combined action of a deep cooling temperature control environment and rotating stirring friction of a stirring friction machining head. A large number of dislocation structures introduced by strong plastic deformation in the rotary stirring friction additive machining process are combined, and the interior of an additive forming structure is rich in a large number of dislocation entanglement network structures. And a large number of precipitated phases are promoted to be uniformly precipitated in the structure, the target of controllability of the material temperature and the structure in the additive manufacturing process is achieved, the structure of the machined and formed metal 3D entity component is optimized, and the mechanical property of the metal 3D entity component is improved.

The invention discloses a dissimilar magnesium alloy composite structure and a low-cost electric arc additive manufacturing method thereof. The method comprises the following steps that 1, AZ series magnesium alloy wires and rare earth magnesium alloy wires are selected; 2, material distribution of the two kinds of wires is subjected to partition design; step 3, preheating the substrate; 4, depositing a material 1 in a single-arc and sequential wire feeding mode, and 5, depositing a material 2 in the middle: depositing the material 2 as a transition layer under a single-arc consumable electrode heat source. And step 6, interface processing. And 7, the component is preheated again, the material 2 continues to be deposited, and finally the AZ-rare earth magnesium alloy composite structure is obtained. According to the method, a single-arc, sequential wire feeding and interlayer friction stir processing cooperation strategy is adopted, the prepared composite structure has the characteristics of controllable performance, structural integration, good interface metallurgical bonding and the like, the performance limitation of a traditional single material is broken through, and the method has wide application prospects in the fields of aerospace, automobile lightweight and the like.

The invention discloses a block magnesium-based composite material capable of quantitatively regulating and controlling the content of nano-particles and a manufacturing method of the block magnesium-based composite material, and belongs to the technical field of metal-based composite material preparation. The method comprises the following steps: providing a magnesium alloy substrate and a cover plate, determining the sectional dimension of a groove of the cover plate according to the volume fraction of target nanoparticles, processing the groove, then filling the groove with the nanoparticles, assembling the cover plate on the substrate in an inverted buckling manner to form a to-be-processed assembly, performing multi-pass stirring friction processing to form a first composite material layer, and stacking the first composite material layer as a new substrate layer by layer to form a second composite material layer; and finally, the target block magnesium-based composite material is prepared. Through the correlation design of the groove size and the target volume fraction, accurate control and uniform dispersion of the nano-particle content are achieved, the problems that a traditional method is high in defect rate, limited in size and the like are solved, the strength and plasticity of the prepared material are remarkably improved, the process is green and environmentally friendly, and the method is suitable for mass production of large-size components and can be popularized to various light metal matrixes; the application prospect is wide.

The invention discloses a high-precision multi-component microalloying nickel-based alloy plate blank and a preparation method, and belongs to the technical field of high-temperature alloy materials. The nickel-based alloy plate blank is prepared from the following raw materials in percentage by mass: 16.68 to 19.76 weight percent of Cu, 0.84 to 1.57 weight percent of Pr, 0.76 to 1.64 weight percent of Se and the balance of Ni. The raw materials comprise Pr and Se, the rare earth element Pr is added, so that the grain boundary can be purified, the purity of the obtained nickel-based alloy material is improved, and a certain grain refining effect is achieved; se can form selenide, the self-lubricating effect is achieved in the subsequent machining process, and the defects caused by friction are reduced. And in the preparation process, a processing mode of combining double-sided friction stir processing and vacuum diffusion welding is adopted, so that the surface defects of the sintered plate are effectively eliminated, the thickness direction is kept highly continuous in the vacuum diffusion welding process, and the nickel-based alloy material with excellent mechanical properties is obtained.

This invention discloses a multi-mode processing method for friction stir deposition modeling driven by cascaded electric spindles. Based on a cascaded electric spindle-driven friction stir deposition modeling die head, the die head includes a screw shaft, a first electric spindle, and a second electric spindle that drives the screw shaft to rotate; a material conveying assembly including a storage box cover and a storage cavity formed by a specific inlet and a specific first outlet; and a stirring extrusion tool, wherein the first electric spindle includes a first hollow mandrel. This invention employs a compact coaxial cascaded electric spindle design, integrating the force transmission, heat transfer, and material transfer functions of the innovative hollow electric spindle into one unit, exhibiting modular characteristics. This overcomes the current additive manufacturing process where granular materials cannot be processed using a stirring tool in a coaxial friction stir process. Based on a circumferentially distributed multi-material conveying assembly design within the electric spindle assembly, this invention features material openness, enabling friction stir deposition modeling of multiple materials or gradient materials.

The present application relates to a kind of metal matrix composite prepared by friction stir processing method, including the mixing of metal matrix composite reinforcement and substrate powder, according to the size of stir pin and shaft shoulder in the stir head of friction stir equipment, using milling cutter to open the groove on pure metal mold, the width is greater than the diameter of stir pin, the depth is greater than the length of stir pin;Reinforcement and substrate powder mixture is added to the groove and is maximized compaction, in the processing area of special friction stir welding machine, the center of stir pin of stir head is aligned with the center of groove, is prepared under the processing scheme of multiple passes variable stir head speed, obtains metal matrix composite at the groove of composite plate processing area, the obtained metal matrix composite reinforcement is uniformly distributed, and the mechanical and friction and wear performance is excellent.The present application can automatically prepare a variety of different kinds of metal matrix composite, without determining specific process parameters for different kinds of metal and reinforcement test, and is widely applicable.

A method of processing high-strength steel includes providing a first piece of high-strength steel. Friction stir processing the first piece of high strength steel is performed by pre-heating an area in advance of a friction stir welding tool and moving the friction stir welding tool between 500 mm and 300 mm per minute to attain a mixed zone having a mixed zone temperature at the mixed zone between a eutectoid temperature and a forge welding temperature from a combination of the friction from the friction welding tool and the step of pre-heating.

The invention provides a double-shaft pumpable feeding stirring friction processing device which comprises a shell, a pressing ring with a feeding hole, a shearing sleeve and a stirring needle are installed at the bottom end of the shell, the stirring needle and the shearing sleeve do axial, rotating and compound motion, a material guiding mechanism or a material cutting mechanism is arranged between the pressing ring and the shearing sleeve, and the stirring needle and the shearing sleeve are arranged in the shell. Groove-shaped stirring structures are arranged on the bottom surfaces of the shearing sleeve and the stirring needle; the invention provides a multi-pose machining method applying the machining device, a flexible filler high-performance repairing method and a method for solving the problem of main shaft play vibration in the solid-phase stirring process. According to the method, the cutter blockage phenomenon is avoided, multi-pose additive manufacturing is achieved, accurate control over filling and efficient repair of complex defects are achieved, and the repair problems that in the prior art, joint thinning is achieved, filling cannot be conducted immediately after furnace shutdown, and flexible filling cannot be formed at a time are solved.

The present application belongs to the technical field of polymer surface metallization, and particularly relates to a preparation method of polymer surface metallization coating based on cold gas dynamic spraying and friction stir processing. The method comprises the following steps: (1) using a cold gas dynamic spraying device, spraying metal powder (such as Al, Cu, Ti, Ag, Sn, etc.) to the surface of a polymer substrate (such as PEEK, PEI, PA6, ABS and their composite materials, etc.) under certain conditions to form a cold sprayed metal coating; (2) using a friction stir welding center to perform friction stir processing on the deposited cold sprayed coating and the interface between the coating and the polymer substrate, so as to obtain a high-conductivity and high-bonding-strength metallized coating on the surface of the polymer substrate. The method combines the advantages of cold gas dynamic spraying technology and friction stir processing technology, and opens up a new process route for polymer and polymer-based composite material surface metallization.

The application relates to an alloy skin forming die and method, and belongs to the technical field of metal plastic working, and solves the problems of low profile precision, poor integrity and high cost of an alloy skin in the prior art. The alloy skin forming die comprises an upper die and a lower die, and further comprises a gas quenching die. The alloy skin forming die provided by the application can be used for aluminum alloy local large deformation skin forming, an aluminum alloy local large deformation skin is prepared through a friction stir processing / fluid forming method, the manufactured aluminum alloy local large deformation skin has high precision and good integrity, and the aluminum alloy local deformation capacity can be improved. The alloy skin forming die provided by the application can also be used for aluminum lithium alloy skin forming, an aluminum lithium alloy skin is prepared through a superplasticity / gas quenching forming method, and finally, the aluminum lithium alloy skin not only has high profile precision, but also has high tensile strength performance, the process flow is simple, the processing cost is low, and the aluminum lithium alloy skin has good integrity and consistency.

The application provides a method for regulating degradation rate of biomagnesium alloy in urinary system. The method comprises the following steps: S1, melting magnesium alloy raw material under protective atmosphere to obtain magnesium alloy ingot; S2, homogenizing the magnesium alloy ingot under inert atmosphere to obtain base material after cooling; S3, stirring friction processing the base material to obtain biomagnesium alloy with predetermined size, wherein the magnesium alloy raw material is composed of the following components by weight percentage: Y: 2-3 wt.%, Nd: 1-2 wt.%, Gd: 0-1 wt.%, Zn: 0-1 wt.%, Ca: 0-1 wt.%, Sr: 0-1 wt.%, and the balance is magnesium and impurity elements. The method can regulate the degradation rate of biomagnesium alloy in urinary system.

The application provides a method for additive manufacturing composite friction stir processing ordered construction of ultra-fine grain network structure, which is characterized by the following steps: through synchronous friction stir processing in electric arc wire additive manufacturing, strong plastic deformation of the friction stir processing is utilized to cause mechanical crushing of the deposited state organization, and a cross friction stir processing mode is combined to obtain an ultra-fine grain network structure; a repeated deposition process causes the organization which has been subjected to strong plastic deformation to undergo recovery recrystallization and grain growth, different span friction stir processing is utilized to cause ordered construction of the deposited state organization grain gradient, and finally, the construction of the component material of the ultra-fine grain three-dimensional network structure is realized.

The invention provides a eutectic high-entropy alloy and a preparation method thereof, and relates to the technical field of high-entropy alloys, and the preparation method comprises the following steps: carrying out stirring friction processing on a eutectic high-entropy alloy matrix, so that the eutectic high-entropy alloy matrix obtains an equiaxed structure with an ultra-fine grain size, and carrying out a cold rolling and heat treatment process on the basis to obtain the eutectic high-entropy alloy with the ultra-fine grain size. An equiaxed structure with a nanocrystalline size is obtained; the crystal grains of the equiaxed structure are nanocrystalline, and the phase structure is a double-phase or multi-phase structure; the double-phase or multi-phase structure under the nanometer equiaxed structure has a low-energy coherent interface, and the grain growth driving force at the high temperature can be remarkably reduced by replacing a high-energy high-angle grain boundary with the low-energy coherent interface. Therefore, the nano eutectic high-entropy alloy disclosed by the invention has excellent mechanical properties and thermal stability. The tensile strength exceeds 1800 MPa under the room temperature condition, and the grain growth temperature exceeds 0.6 time of the melting point.

The invention discloses a method for processing and modifying a zirconium-based alloy structure based on cross friction stir. The method comprises the following steps: S1, mounting a zirconium-based alloy plate on friction stir equipment; s2, the zirconium-based alloy plate is subjected to first-time stirring friction machining; s3, the zirconium-based alloy plate is subjected to second-time stirring friction machining, the machining direction of the second-time stirring friction machining and the machining direction of the first-time stirring friction machining intersect to form an angle alpha, the heat input quantity of the second-time stirring friction machining is smaller than the heat input quantity of the first-time stirring friction machining, and the heat input quantity is the rotating speed and the advancing speed of the stirring head; s4, repeating the steps S2 and S3 for 2-5 times; and S5, stress relief annealing treatment is conducted on the zirconium-based alloy plate. The modified structure is more uniform, grain refinement and equiaxalization are achieved, good plasticity is kept while high strength is obtained, and the technical problem that strength and plasticity are inverted in a traditional severe plastic deformation method is solved.

The application discloses a copper and copper alloy crack repairing method based on friction stir repair, and relates to the technical field of defect repairing, and comprises the following steps: step S1, pretreating copper material, and machining irregular cracks into regular grooves; step S2, selecting welding wire, feeding the welding wire into the groove, and pre-connecting the welding wire and the groove by arc preheating; step S3, performing friction stir processing on the pre-connected part of the welding wire, and repairing the groove by the thermal-mechanical coupling effect; and step S4, repeatedly performing steps S2 and S3 according to the groove depth and width to realize single-layer or multi-layer repairing of the welding wire in the groove until the groove is completely repaired. The application realizes the friction stir repairing process of large-size cracks and irregular cracks by combining cutting processing, arc preheating processing and friction stir repair, has low heat input, high repairing quality and a wider application range.

The invention provides a stirring friction processing pretreatment method for a wire material, and relates to the technical field of metal plastic processing, and the stirring friction processing pretreatment method comprises the following steps: S1, configuring a stirring head: the stirring head comprises a stirring shaft and a stirring needle arranged at the end part of the stirring shaft; s2, material pretreatment is conducted, specifically, a material groove is formed in the surface of the to-be-machined metal plate, and the material groove is filled with a composite material; s3, stirring friction processing: driving a stirring head to rotate through a motor, carrying out stirring friction processing on an area containing the material groove on the metal plate to be processed, and forming a stirring area in the metal plate; and S4, blank cutting, wherein in the stirring area, a blank plate with the rectangular cross section in the horizontal direction is cut. Through plastic deformation of stirring friction processing and the configured special stirring needle, deep and uniform rheology of the material can be realized, the problem of insufficient plasticity of the material is effectively avoided, and the problems of interface reaction and grain coarsening caused by a traditional pretreatment mode are avoided.

The present application belongs to the technical field of laser additive manufacturing, in particular to a method for reducing anisotropy of titanium alloy by laser additive manufacturing and friction stir processing. The method comprises the following steps: step one, obtaining TC11 powder and performing drying treatment; step two, using a set laser scanning strategy, laser powder deposition is performed on the dried TC11 powder in a layered form to obtain a first laser cladding layer; step three, friction stirring is performed on the first laser cladding layer according to a set stirring path until the first laser cladding layer is completely processed; and step four, steps two to three are repeated to complete laser cladding and friction stir processing layer by layer to obtain a formed part. The present application combines the forming advantages of laser additive manufacturing and the microstructure modification advantages of friction stir processing, adopts an "interlayer instant compounding" mode, and constructs a composite manufacturing process, thereby efficiently reducing the anisotropy of TC11 titanium alloy components without additional alloying or complex heat treatment.

The present invention relates to a rotatable telescopic friction stir processing head and a processing method. The rotatable telescopic friction stir processing head mainly includes: drive motor I, stirring head, stirring pin, hydraulic telescopic system, rotatable shoulder, transmission belt, drive motor II, landing gear to be processed. The rotational speeds of the stirring pin and the rotatable shoulder can be adjusted differently through different motors. The double-rotatable telescopic friction stir processing head of the present invention can perform stirring processing on the landing gear of an aircraft manufactured by laser additive manufacturing, while realizing adjustable surface and subsurface tissue structures of additive manufacturing, greatly improving the mechanical properties of the aircraft landing gear, reducing the surface roughness of the aircraft landing gear after additive manufacturing, improving the surface quality, and reducing the processing procedures for additive manufacturing of the aircraft landing gear.

The invention relates to the technical field of aluminum alloys, in particular to a preparation method of a high-performance fine-grain structure Ce-containing 2219 aluminum alloy. The method comprises the steps that S1, pure aluminum, an Al-50Cu intermediate alloy, an Al-20Mn intermediate alloy, an Al-20Ce intermediate alloy and an Al-10Zr intermediate alloy are smelted in a molten pool at the temperature of 750-850 DEG C, and an aluminum alloy cast ingot is prepared; and after casting, a cast ingot is subjected to homogenization treatment, rolling and friction stir processing treatment. And finally, the Ce-containing 2219 aluminum alloy which contains a fine grain structure matrix, has a grain boundary pinning effect and a high internal friction capacity and is of an Al8Cu4Ce dispersed phase is prepared, and the Ce-containing 2219 aluminum alloy comprises the following components in percentage by weight: 5.8 to 6.8 percent of Cu, 0.2 to 0.4 percent of Mn, 0.10 to 0.15 percent of Zr and 0.1 to 0.8 percent of Ce. The method is easy to operate, low in cost and easy to popularize and apply, and the prepared aluminum alloy has the advantages of being small in grain, good in plasticity, high in damping value and good in thermal stability.

A method of processing high-strength steel includes providing a first piece of high-strength steel. Friction stir processing the first piece of high strength steel is performed by pre-heating an area in advance of a friction stir welding tool and moving the friction stir welding tool between 500 mm and 300 mm per minute to attain a mixed zone having a mixed zone temperature at the mixed zone between a eutectoid temperature and a forge welding temperature from a combination of the friction from the friction welding tool and the step of pre-heating.

The application discloses a kind of high-strength low-sawtooth rheological 5xxx aluminum alloy plate and its preparation method and application, belong to metal material processing technical field.The application adopts three-stage synergistic process: step 1: 5xxx aluminum alloy plate alloy is carried out two-stage high-temperature annealing pretreatment;Step 2: 5xxx aluminum alloy plate after step 1 processing is carried out friction stir processing (FSP);Step 3: 5xxx aluminum alloy plate after step 2 processing is carried out rolling deformation.The processing method of the application, process is simple, short cycle, low energy consumption, can make 5xxx aluminum alloy plate yield strength ≥389 MPa, tensile strength ≥407 MPa, elongation ≥7.5%;The average amplitude of sawtooth is reduced to low level of 0.28 MPa simultaneously, the application has high strength, good plasticity and the comprehensive performance of extremely inhibiting sawtooth rheological, provides new way for high service reliability 5xxx aluminum alloy plate preparation.

The invention discloses a steel rail modification strengthening method based on friction stir processing, which comprises the following steps: removing oxides on the surface of a steel rail through polishing, and wiping the surface of the steel rail; a proper stirring head is selected, the rotating speed, the advancing speed, the downward pressure and the dip angle parameters of the stirring head during stirring friction machining are set in a controller, and a low-heat-input technological parameter combination is selected; rotating the stirring head at a high speed and moving downwards until the downward pressure between the stirring head and the surface of the steel rail reaches a preset value; after the stirring head rotating at a high speed and the surface of the steel rail are pressed tightly, in-situ rotating friction is conducted till the set time is reached; the stirring head horizontally moves in the set advancing direction while rotating, the surface of the key weak area of the steel rail is machined, and grain crushing and structure refining are achieved; after the machining process is completed, the stirring head is pulled back upwards and leaves the surface of the steel rail. According to the steel rail modifying and strengthening method based on stirring friction machining, the technological process is simplified, and operation is convenient and fast.

The application discloses an aging strengthening aluminum alloy plate end face friction stir processing method and belongs to the technical field of aluminum alloy thick plate preparation and processing. The solid solution state aging strengthening aluminum alloy plate is butted with a dissimilar plate and is clamped and fixed, and a starting plate and a leading-out plate are arranged on the side of the aging strengthening aluminum alloy plate and the dissimilar plate. A stirring needle is arranged at the bottom end of a stirring head, the distance between the outer edge of the stirring needle and the end face of the aging strengthening aluminum alloy plate is 0.01-5 mm, the stirring head is screwed into the starting plate, the aging strengthening aluminum alloy plate is subjected to underwater friction stir processing treatment or liquid nitrogen cooling friction stir processing treatment, the processed aging strengthening aluminum alloy plate is taken down, and aging treatment is carried out. The application can improve the organization layering phenomenon of the plate through the plastic flow of the material in the plate thickness direction, improve the interlayer bonding strength of the plate, and effectively prevent the end face layering cracking of the plate.

The application discloses a kind of based on hot-pressing and friction stir processing composite preparation aluminum nickel energetic material method, aluminum powder, nickel powder and additive are weighed in proportion, then the aluminum powder, nickel powder and additive weighed are mixed evenly, and mixed material is obtained, mixed material is placed into mould and is hot-pressed by hot-pressing forming process Hot-pressing composite, prepared by metallurgical reaction with certain shape block blank;Aluminum nickel composite blank is plastically processed by friction stir processing process, and finally aluminum nickel energetic material is obtained.The application is suitable for manufacturing larger aluminum nickel energetic material structural member, and the preparation process does not need vacuum sintering, the manufacturing cycle is shorter, and the production cost is lower.The structural strength and reaction energy release density of the aluminum nickel energetic material prepared by the application are higher, meet the demand of weapon equipment for efficient damage, and have good application prospect.

The invention discloses an aluminum-based composite material-aluminum alloy connecting piece which comprises an aluminum-based composite material and aluminum alloy connected to one end of the aluminum-based composite material through friction stir welding. The aluminum-based composite material and the aluminum alloy are subjected to metallurgical bonding before friction stir welding, and a metallurgical bonding interface is formed at the bonding position of the aluminum-based composite material and the aluminum alloy; the invention further discloses a friction stir forming method of the aluminum-based composite material-aluminum alloy connecting piece, the method for connecting and forming the aluminum-based composite material and the dissimilar material is obtained in the mode that the procedures of casting, powder metallurgy, friction stir machining and the like are combined, and the problem that the aluminum-based composite material and the dissimilar metal material are difficult to connect is solved. The reliability of connection forming of the aluminum-based composite material and the dissimilar metal is improved, the service safety of the aluminum-based composite material and the dissimilar metal material under the high-low temperature alternating condition is improved, and meanwhile the production cost is reduced.

The application provides a corrosion-resistant titanium alloy β Titanium alloy and surface modification method thereof, belong to alloy modification technical field.The application includes in β A layer of nano Zn particles is laid on the surface of titanium alloy base material, a gradient structure bottom layer containing Zn is constructed by adopting a friction stir processing technology, the treated base material is handled by compression plasma flow, and a dense smooth surface layer combined with the gradient structure bottom layer containing Zn is constructed.The application constructs a gradient structure bottom layer containing Zn by adopting a friction stir processing technology, handles by compression plasma flow, constructs a dense smooth surface layer combined with the gradient structure bottom layer containing Zn, and is characterized by the following advantages: β The titanium alloy surface forms a composite modified layer with longitudinal gradient structure and low roughness surface layer.The corrosion resistance of the titanium alloy in a simulated physiological environment is significantly improved β The titanium alloy in a simulated physiological environment is significantly improved, and the process is physical modification without harmful reagents, and is suitable for the mechanical matching and biocompatibility requirements of bone implants.

A method of friction stir processing (FSP) includes contacting a first workpiece with a FSP tool, where the first workpiece is a low-melting temperature metal or alloy and the FSP tool is a single-body FSP tool having a diamond working surface. The method also includes rotating the FSP tool in contact with the first workpiece at an interface and generating thermal energy at the interface to heat the first workpiece. The method further includes conducting thermal energy away from the interface with the FSP tool, and friction stirring the first workpiece at a temperature of the FSP tool below 800° C.