223 results about "Shot peening" patented technology

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 belongs to the technical field of metal material mechanical property research, and discloses a gear shot peening tooth surface residual stress calculation method and system.The method comprises the steps that a shot speed calculation model in the gear shot peening process is built, shot peening process analog simulation is carried out, and dynamic information of collision between shots and a tooth surface is output; the projectile speed is converted from a machine tool coordinate system to a local coordinate system; establishing a sprayed target plate model and a projectile model, dividing grids, and assembling the grid-divided projectile model and the sprayed target plate model to construct a random multi-shot finite element geometric model; and performing finite element simulation calculation on the random multi-shot finite element geometric model, and outputting residual stress distribution of the gear. According to the method, computational fluid mechanics and a discrete element method are coupled, a high-precision calculation model of the shot speed in the gear shot blasting process is constructed, the forming mechanism and distribution characteristics of the tooth surface residual stress in the actual shot blasting process are effectively reflected, and the method is good in economical efficiency, high in simulation precision, high in process executability and closer to engineering practice.

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 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 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 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 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.

Systems and methods treat sucker rods in a machine through a multi-step process. Initially, sucker rods are cleaned before being conditioned. The conditioning process involves using a defined type and a defined size of media, applied at a first intensity to the rods using first media accelerators (first wheels with a specific diameter and rotational speed, and / or imparting a certain amount of media). The conditioned surfaces are then shot peened at a higher intensity using second media accelerators, which can have larger diameters, faster rotational speeds, and / or can impart a greater amount of media. Both the conditioning and shot peening processes involve reclaiming the media for reuse.

This invention discloses a multi-process synergistic method for strengthening and toughening titanium alloys. The method includes: firstly, pre-treating the titanium alloy surface with sandblasting; then, subjecting the pre-treated titanium alloy to solid embedding carburizing treatment; subsequently, under inert atmosphere protection, sequentially subjecting the carburized titanium alloy to solution treatment, rapid cryogenic treatment, and aging treatment; and finally, shot peening the surface of the heat-treated titanium alloy. This invention solves the problem in existing technologies where a single process is insufficient to synergistically improve the strength and toughness of titanium alloys, achieving a synergistic match between high strength and high hardness on the surface of the titanium alloy material and high toughness in the matrix.

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 provides a forming process method of an aircraft panel, which comprises the following steps of: firstly, carrying out finite element joint analogue simulation on stretch forming and shot peening strengthening processes before actual operation is started, and determining optimal stretch and low-energy shot peening parameters; after manufacturing is started, a single profile blank is prepared through an integrated extrusion and quenching combined technology, and the defects that in a traditional technology, the rigidity of a multi-component riveting plate is low, and the material utilization rate is low are overcome; in the stretching process, residual tensile stress is introduced into the core part of the wallboard through pre-stretching, and the residual tensile stress and surface residual compressive stress generated by subsequent shot blasting can form a synergistic strengthening effect, so that the fatigue life is prolonged; and shot blasting adopts a low-energy mode, so that various defects caused by traditional high-energy spraying can be effectively avoided while the surface appearance and the pressure stress precision are ensured. The invention also provides targeted process optimization for ribbed and unribbed wallboards, so that not only is the dependence on complex clamping equipment eliminated, but also the deformation risk caused by clamping stress can be effectively avoided.

The invention relates to the technical field of aero-engine manufacturing, in particular to a protection tool and method for shot blasting of a turbine disc of an aero-engine. The protection tool comprises a protection cover with a left open cavity, the inner surfaces of the front side wall and the rear side wall of the protection cover are provided with a plurality of attaching ribs used for being embedded into tooth grooves in the side faces of tenon teeth, and tight covering is achieved through accurate matching of the attaching ribs and the tooth grooves. Preferably, the tool further comprises a clamping hoop composed of a U-shaped frame, a driving screw rod and a jacking block, and the clamping hoop is used for firmly hooping the protection cover on the tenon teeth. The protective cover is made of elastic wear-resistant materials such as rubber. The protection tool can accurately and reliably protect the tooth-shaped surfaces on the two sides of the tenon tooth from being impacted and damaged by shots in the shot peening process, the problems that in a traditional adhesive tape protection method, attaching is not tight, efficiency is low, and adhesive stains are prone to being left are solved, the quality and efficiency of the shot peening strengthening process are remarkably improved, and the production cost is reduced.

The utility model discloses a shot blasting equipment, include: shot blasting bin, inside has shot blasting chamber, shot blasting device has shot blasting gun setting in shot blasting chamber, shot blasting gun is connected with removal module and rotation module, workpiece fixing device, including the rotary table, be provided with the fixed column for fixing workpiece on the rotary table, the fixed column rotatable, shot blasting generating device is connected with shot blasting gun, shot blasting collection device, connects shot blasting chamber and shot blasting generating device, makes shot material can cyclic use. The utility model has the advantages that realizes automatic shot blasting, and through setting rotatable workpiece fixing device and the shot blasting generating device who can remove makes workpiece in the process of processing without dead angle, guarantees the processing quality, improves product processing efficiency.

The invention discloses a cavitation shot peening surface strengthening method and system based on cooperation of high hydrostatic pressure and spherical focused ultrasound. The method comprises the following steps: establishing and maintaining a hydrostatic pressure environment higher than 0.1 MPa in a high-pressure processing cavity filled with a degassing liquid medium; the to-be-machined surface of the workpiece is positioned in a sound field focal region of the spherical focused ultrasound transducer; and in the high hydrostatic pressure environment, a transducer is driven to work so as to generate a cavitation bubble group in a space confinement range in a focal region of the transducer, and meanwhile, the workpiece is controlled to move according to a preset path, so that cavitation collapse impact acts on a target region on the surface of the workpiece. The device comprises a high-pressure processing cavity, a spherical focused ultrasonic transducer, a multi-degree-of-freedom movement mechanism and a control system. Through cooperation of high hydrostatic pressure constraint and the spherical focusing sound field, precise localization and energy strengthening of the cavitation effect are achieved, a plastic deformation layer can be efficiently and controllably introduced to the surface of a metal material, the surface hardness can be remarkably improved, a residual compressive stress layer is formed, surface layer grains are refined, and the method is suitable for precise surface strengthening of complex components.

Equipment for grenade shell shot blasting belongs to the technical field of processing equipment, and comprises a grenade shell shot blasting system body, a motor reducing mechanism, a positioning frame, a box body, an electric door mechanism, a shell shot blasting mechanism, a blind hole shot blasting mechanism and a dust removal mechanism, and the motor reducing mechanism, the positioning frame, the box body, the electric door mechanism, the shell shot blasting mechanism, the blind hole shot blasting mechanism, the dust removal mechanism and the grenade shell shot blasting system body are mounted together. Based on the grenade shell shot blasting system body, the shot blasting platform, the dust removal equipment and the like of the grenade shell shot blasting system are technically improved, and under the combined action of related mechanisms, a plurality of grenade shells can be simultaneously driven by the motor reducing mechanism to rotate and respectively enter a plurality of stations; the shell shot blasting mechanism, the blind hole shot blasting mechanism and the dust removal mechanism can conduct shell outer surface and blind hole shot blasting machining on a plurality of grenade shells and conduct purging operation on the surfaces of the grenade shells at the same time, the multiple procedures do not interfere with one another, and therefore the production efficiency is relatively improved.

Provided is a method for producing a surface-treated metal material in which a complicated pretreatment step and a pretreatment solution are not required before a step for forming a film on the surface, whereby a burden on the environment can be reduced, and a surface-treated film can be easily formed at low cost. A method for producing a surface-treated metal material in which at least a part of the surface of a metal substrate (1) is provided with a silane coating film, the method comprising: a shot peening step for spraying abrasive grains (2) for shot peening onto at least a part of a region (R) of the surface of the metal substrate; a coating step for coating a metal treatment solution containing a silane compound on the surface of the metal substrate (1) subjected to shot peening; and a drying step in which the metal substrate (1) coated with the metal treatment solution is dried to form a silane film.

The invention relates to the technical field of quenching processes, in particular to a casting multi-stage quenching process which comprises the following steps: putting a casting into a vacuum furnace, heating and preserving heat, then opening a furnace door, and continuously preserving heat in an air environment at the same temperature to obtain a pretreated casting; the pretreated casting is immersed in a quenching medium, ultrasonic treatment is applied during the period, the pretreated casting is taken out after being cooled and then air-cooled to the room temperature, and a quenched casting is obtained; the quenched casting is subjected to shot blasting treatment, then heated and subjected to heat preservation, and after the quenched casting is cooled to the room temperature, a surface layer low-carbon casting is obtained; and then nitriding treatment and post-oxidation treatment are carried out in sequence. According to the method, the medium-carbon casting is firstly heated in the vacuum furnace at a high temperature, then the medium-carbon casting is subjected to short-time high-temperature oxidation and decarburization in the air environment to reduce the carbon content of the surface layer of the casting, and nitrogen diffusion is prevented from being inhibited due to excessive carbon, so that the thickness of a nitriding layer is increased, the problem that the nitriding layer is thin and brittle is avoided, and the hardness, wear resistance and impact resistance of the finished casting are improved.

A peening method according to the present invention uses an impact pin 1 to strike a weld toe 17a of a weld joint 11, wherein: the weld toe 17a has a minimum curvature radius of not more than 0.50 mm in a cross-section parallel to the thickness direction of a steel sheet and has a Vickers hardness of not less than 170 Hv; the metal structure thereof has a crystal structure including body-centered cubic or body-centered tetragonal crystal grains; the tip-end radius of the impact pin 1 is not more than 1.3 times the minimum curvature radius of the weld toe 17a; and the weld toe 17a is struck under impact conditions in which the kinetic energy of the impact pin 1 is not less than 0.375 mJ so as to create deformation twinning with a thickness of not more than 50 nm in the weld toe 17a and miniaturize the crystal grains.

The invention belongs to the field of metal molds and surface treatment, and relates to a manufacturing process of a copper-clad steel and iron hot-pressing texture template, which comprises the following steps: preparing a steel substrate, compounding a copper layer on the working surface of the steel substrate, and then carrying out flattening processing; carrying out three-dimensional texture modeling and path planning on the leveled surface of the copper layer, engraving a micro texture by using laser, and then carrying out micro shot peening strengthening on the texture surface; the template is subjected to heat treatment including steel matrix quenching and tempering treatment and gradient stress relief annealing; and depositing a vapor-regulating deposition coating and a super-hydrophobic molecular film on the surface of the template with the textures in sequence. By adopting the composite structure of the steel substrate and the copper surface layer, the high strength and high toughness of the core part and the high thermal conductivity of the surface are considered, and the performance contradiction of a single material is solved; the fineness of micron-sized textures is ensured through laser engraving, and the abrasion resistance of the textures is greatly improved from the two dimensions of mechanical strength and surface hardness through micro shot peening strengthening and a PVD superhard coating.

The invention discloses stone bridge type cutting equipment with a stress intervention function and a using method, the stone bridge type cutting equipment comprises a main body of the stone bridge type cutting equipment and a conveying part which stretches across the top of stone to machine the stone and move the stone, and the conveying part is arranged in the middle of the bottom of the main body and used for conveying and fixing the stone. The cutting units are arranged on the two sides of the main body to cut the stone, and a control unit is arranged outside one of the cutting units; the device has the advantages that micro-crack propagation and collapse are prevented by combining shot peening strengthening cutting ropes with gap physical support and active dry prestress, a high-temperature unit is immediately moved into a clean area to be soaked and cooled by utilizing an automatic rotation mechanism and is replaced with a new unit, and a'cutting-scraping-scouring-filtering 'closed-loop system is constructed; the curve plate is used for descaling, the scraper wheel is driven by power to self-clean the filter screen, liquid is dynamically exchanged, and it is ensured that cooling is clean and secondary pollution is avoided.

The invention discloses a shot peening forming prestress loading mode determining method and device, electronic equipment and a storage medium. The method comprises the following steps: constructing a pre-stress loading simplified model, performing first pre-stress loading simulation on the pre-stress loading simplified model based on a preset pre-stress loading mode, and determining a first surface stress state distribution condition of a to-be-processed part; a prestress loading standard model is constructed for second prestress loading simulation, the second surface stress state distribution condition of the to-be-machined part is determined, and a surface stress state model is constructed; based on a preset prestress loading mode, an actual prestress loading experiment is conducted, and the actual surface stress state distribution condition of the to-be-machined part is determined; the surface stress state model is corrected according to the actual surface stress state distribution condition, and the corrected surface stress state model is adopted to determine a target prestress loading mode of the to-be-machined part; precise control over the prestress is achieved, and the prestress applying efficiency and accuracy are improved.

The invention belongs to the technical field of steam generator inspection and maintenance, and particularly relates to an integrated spraying structure for shot peening and descaling in a steam generator tube bundle, the integrated spraying structure comprises a sealing ring and a small spraying gun, and the sealing ring comprises a base body and a dovetail located at the rear end of the base body. The base body has elasticity and is used for being attached to a heat transfer pipe opening. The outer side of the front end of the small spray gun is provided with a dovetail groove and an installation internal thread. And the dovetail is in interference fit with the dovetail groove. The mounting internal threads are used for being connected with an external supporting mechanism. The external supporting mechanism is used for supporting the small spray gun to be stable in position and free of looseness in the operation process. A nozzle of the small spray gun is of a long and thin pipe structure and used for stretching into the heat transfer pipe by more than 30 mm. Mounting external threads are arranged on the outer side of the rear end of the small spray gun. And the mounting external threads are used for being connected with a connector of a shot-compressed air conveying pipeline. By means of the innovative structural design, the problems that in the prior art, when a spray gun sprays shot materials at a high speed, the sealing performance is insufficient, and the spraying efficiency is low are solved.

An automatic heat dissipation thick blade for a plate shearing machine belongs to the technical field of mechanical cutters and comprises a blade body, heat dissipation holes are formed in the blade body and are in a raindrop shape or an oval shape, transition fillets are arranged on the edges of the heat dissipation holes, blind holes and through holes are flexibly selected according to working conditions, the depth of the blind holes is controlled to be 50%-70% of the thickness of the blade body, and a conical channel is formed. Reinforcing ribs are arranged at the bottom, venturi contraction structures are arranged in the through holes, airflow is accelerated, and the heat dissipation efficiency is improved. Different areas of the blade are differentially perforated to match the temperature gradient. Paraffin or graphene composite phase change materials are injected into the through holes, and temperature rise is delayed. The porosity of the heat dissipation holes is adjusted according to the temperature gradient to maintain heat dissipation balance. The edge of the heat dissipation hole is subjected to shot peening strengthening to improve the fatigue strength.

The application discloses a small-hole shot blasting method for a turbine disc, which comprises the following steps: first, a straight jet gun is used to perform shot blasting on an A-type test piece to obtain a device parameter range of the straight jet gun when the shot blasting strength of the turbine disc small hole meets the lower limit and the upper limit, and the device parameter range is defined as a first set of device parameters and a second set of device parameters respectively; then, the N-type test piece is shielded and shot blasted according to the first set of device parameters and the second set of device parameters respectively to obtain a shot blasting strength range of the shielded N-type test piece; then, the N-type test piece simulating the small hole of the turbine disc is subjected to the rotating lance shot blasting according to the converted shot blasting strength range of the N-type test piece to confirm a third set of device parameters of the rotating lance shot blasting; then, the moving speed Vt of the rotating lance is tested under the premise that the third set of device parameters is met and the small-hole shot blasting coverage reaches 100%; then, the moving speed V of the rotating lance is calculated when the shot blasting coverage of the small hole of the turbine disc is greater than or equal to 200%; and finally, the rotating lance is adjusted to work under the third set of device parameters and the moving speed V.

The utility model discloses an alloy shot processing quenching device for shot blasting on the surface of an aircraft blade, which comprises a quenching furnace main body connected with an external power supply for supplying power and a cover arranged at the upper side of the quenching furnace main body, and motor frames are respectively arranged at the upper end and the lower end of the left side of the quenching furnace main body; a hydraulic pump driving motor is arranged on the upper side of the motor frame, an oil pump is arranged on the lower side of the motor frame, and in the quenching process, uniform heating is a key factor for ensuring the quality of alloy shots. In the device, the chassis rotates to drive the storage rack and the alloy shots to rotate synchronously, so that the alloy shots can uniformly receive heat radiation from heat supply metal wires on the inner wall of the quenching furnace in all directions. And the local overheating or supercooling phenomenon caused by static placement is avoided, the consistency of the overall temperature of the alloy shot is guaranteed, a uniform austenite structure can be formed easily, and a foundation is laid for subsequent obtaining of good quenching performance.

This invention discloses a method for manufacturing high-temperature and high-pressure resistant boiler flue tubes, comprising the following steps: feeding and melting raw materials, followed by cooling to obtain a blank material; forging and sandblasting the blank material to obtain a steel bar; forming the steel bar to obtain a seamless tube; cold working the seamless tube; rolling the seamless tube to obtain a spiral seamless tube; electron beam irradiation of the spiral seamless tube; instantaneous pulse current heating of the spiral seamless tube; salt bath treatment of the spiral seamless tube; magnetic field quenching of the inner and outer surfaces of the spiral seamless tube; gradient deep cryogenic treatment of the spiral seamless tube; tempering of the spiral seamless tube; shaping and straightening of the spiral seamless tube; ultrasonic impact treatment of the spiral seamless tube; shot peening of the spiral seamless tube; water flow strengthening treatment of the inner wall of the spiral seamless tube; and pickling of the spiral seamless tube. Boiler flue tubes prepared by this method can maintain excellent high-temperature strength and thermal fatigue resistance in high-temperature flue gas environments, possessing high strength and toughness, and preventing safety hazards such as leakage and bursting.