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96 results about "Pre deformation" patented technology
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Mechanical part pre-deformation clamping process method based on simulation analysis
The invention discloses a mechanical part pre-deformation clamping process method based on simulation analysis, and relates to the technical field of mechanical manufacturing. The method comprises the following steps that S1, a design drawing, material characteristic parameters, blank size specifications and technical parameters of a clamp system of a to-be-machined part are collected; according to the method, an integrated simulation model of a part, blank and clamp system is constructed, blank key parameters and the constraint relation of all parts are fused, multi-field coupling simulation is combined, the theoretical deformation field pre-judgment precision is greatly improved, reliable data support is provided for pre-deformation design, a target compensation curved surface is generated through a geometric inversion algorithm, and the pre-deformation design precision is improved. By matching with a pre-deformation clamp with an adjusting mechanism, reverse pre-deformation is realized, differences of different batches of blanks are adapted, machining and rebound deformation are effectively counteracted, simulation and process parameters are corrected through a detection result by means of a closed-loop optimization mechanism, machining precision stability is guaranteed, trial cutting cost and rejection rate are reduced, and the method is suitable for machining of various easily-deformed parts.
Owner:DONGTAI HAOTIAN INTELLIGENT EQUIP TECH CO LTD
Super-large ingot type high-temperature alloy forging material and preparation method thereof
The invention relates to the technical field of high-temperature alloys, and provides a preparation method of an oversized ingot type high-temperature alloy forging material, which comprises the following steps: S1, heating a high-temperature alloy ingot; s2, the high-temperature alloy cast ingot obtained in the step S1 is subjected to pre-deformation, wherein pre-deformation comprises upsetting and drawing-out which are conducted in sequence; s3, the pre-deformed high-temperature alloy cast ingot is subjected to homogenizing heat treatment; s4, performing cogging thermal deformation on the high-temperature alloy ingot subjected to the homogenizing heat treatment; and S5, the forging stock obtained in the step S4 is cooled and then subjected to heat treatment, and finally radial forging is conducted. According to the preparation method of the high-temperature alloy forged material, firstly, a large-size high-temperature alloy cast ingot is subjected to pre-deformation with the small deformation amount, and then homogenization heat treatment is conducted at the high temperature, so that segregation phases in the cast ingot are redissolved, segregation elements are diffused, and the high-temperature alloy forged material is obtained. And after homogenization, the high-temperature alloy cast ingot is subjected to fast forging and radial forging, and the high-temperature alloy bar with the uniform structure is obtained.
Owner:CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Method for improving hot working performance of nickel-based superalloy for molten salt reactor through combination of pre-deformation and homogenization
The invention belongs to the technical field of high-temperature alloy heat treatment, and discloses a method for improving the hot working performance of a nickel-based high-temperature alloy for a molten salt reactor by combining pre-deformation and homogenization. The method comprises the steps that raw materials of the nickel-based superalloy for the molten salt reactor to be improved are sequentially subjected to vacuum induction melting, pouring and electroslag remelting refining treatment, and an electroslag remelting refined alloy cast ingot is obtained; the electroslag remelting refined alloy cast ingot is sequentially subjected to heating, heat preservation and pre-deformation treatment and is air-cooled to the room temperature, and a pre-deformed cast ingot is obtained; and the pre-deformed cast ingot is subjected to homogenization treatment and air cooling to the room temperature, and the method is completed. The method is a novel heat treatment process combining pre-deformation and high-temperature homogenization, the hot working performance of the alloy is optimized, the high-temperature alloy uniform in structure and excellent in mechanical property is obtained, and application in the field of high-temperature molten salt energy systems is met.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
Edge auxiliary traction system and method for longitudinal large-curvature forming of roller-coated hyperbolic aluminum plate
The invention relates to the technical field of roller coating hyperbolic aluminum plate machining control, in particular to an edge auxiliary traction system and method for longitudinal large-curvature forming of a roller coating hyperbolic aluminum plate. The edge auxiliary traction system comprises a clamping pre-deformation unit, when a main stretcher is started, a traction clamping jaw pulls down at a basic speed, and a dynamic proportional relation between the edge stretching speed and the central stretching speed is established; during stretching, when the displacement increment reaches a threshold value, the traction force is proportionally distributed according to the distance from the center line, the pull-down force is updated in real time, when the strain deviation exceeds the limit, a deviation area is positioned through a multi-modal array, the traction speed and the pull-down force of the area are increased, and the local curvature radius reaches a critical range, a reinforced traction mode is started; speed and plastic flow phase locking and grain orientation regulation and control are achieved, traction force is maintained till stress is released in the pressure maintaining stage, the longitudinal large-curvature forming precision of the roller-coated hyperbolic aluminum plate is improved, wrinkles and cracks are reduced, and the method is suitable for machining of the high-precision hyperbolic aluminum plate.
Owner:OSMAX(WUHAN) NEW MATERIALS CO LTD
High-toughness aluminum-lithium alloy and preparation method thereof
The invention discloses a high-toughness aluminum-lithium alloy and a preparation method, and belongs to the field of metal material processing technologies, and the preparation method comprises the following steps: carrying out solution treatment on an annealed aluminum-lithium alloy, then carrying out 3-5% of pre-deformation, then carrying out low-temperature pre-aging on the pre-deformed aluminum-lithium alloy, then adding 1-8% of intermediate secondary deformation, then carrying out high-temperature aging, and finally carrying out high-temperature aging treatment on the pre-deformed aluminum-lithium alloy to obtain the high-toughness aluminum-lithium alloy. And cooling to room temperature to obtain the high-toughness aluminum-lithium alloy. According to the method, dislocation configuration of the aluminum-lithium alloy is uniform and compact through a two-stage stretching heat treatment (TTIA) process, precipitation strengthening of a T1 phase is promoted, and alloy weak points are pinned, so that plasticity is improved while the strength of the aluminum-lithium alloy is greatly improved, and synergistic growth of the strength and plasticity of the alloy is achieved; the aluminum-lithium alloy treated by the method is high in strength and good in plasticity, and can meet the performance requirements of the fields of aerospace, automobile manufacturing and the like on structural materials in the national industrialization process.
Owner:XI AN JIAOTONG UNIV
Rolling pre-deformation method for improving toughness and plasticity of 2-series aluminum alloy
The invention provides a rolling pre-deformation method for improving toughness and plasticity of 2-series aluminum alloy, and belongs to the technical field of aluminum alloy material processing. The rolling pre-deformation method comprises the following steps: sequentially carrying out solid solution quenching treatment, ultralow-temperature transverse rolling pre-deformation, rolling pre-deformation and aging treatment on a 2-series aluminum alloy hot-rolled plate. The quenching-state 2-series aluminum alloy is sequentially subjected to transverse and rolling-direction variable-temperature pre-deformation, the grain structure, dislocation configuration and distribution can be well regulated and controlled, a fine and uniform precipitated phase is obtained after aging, and the strength, toughness and forming performance of the 2-series aluminum alloy are improved while the anisotropy of the plate is reduced. The method is simple in process, convenient to operate and easy to industrialize.
Owner:JIMEI UNIV
Engine blade welding deformation control method based on pre-deformation and active cooling
PendingCN121715724ABiological modelsDesign optimisation/simulationTemperature controlPre deformation
The invention discloses an engine blade welding deformation control method based on pre-deformation and active cooling, and relates to the technical field of precision welding manufacturing, and the engine blade welding deformation control method comprises the following steps: collecting multi-source real-time monitoring data in a blade welding process, and inputting the data into a trained welding heat-force coupling dynamic model; performing nonlinear interaction analysis on real-time monitoring data through a built-in deformation semantic analysis unit in the welding heat-force coupling dynamic model, extracting core characteristic parameters, and creating a regulation and control decision system comprising a strain state space, a temperature control action space and a deformation compensation evaluation function by utilizing the strain state mapping set; the method is used for predicting a deformation response value corresponding to each regulation action. According to the method, through a regulation and control decision system comprising a strain state space, a temperature control action space and a deformation compensation evaluation function, deformation response is predicted, an optimal cooling path and a pre-compensation quantity regulation and control scheme are generated, and finally dynamic optimal control over blade welding deformation is achieved.
Owner:NANCHANG HANGKONG UNIVERSITY
Low-expansion three-temperature cold and hot plate and preparation method thereof
PendingCN121951310AEffective control of uniformityprevent precipitationSolid state diffusion coatingPre deformationTitanium
The invention discloses a low-expansion three-temperature cold and hot plate and a preparation method, and belongs to the field of precise alloy components. The cold and hot plate is made of titanium-niobium-based alloy, the titanium-niobium-based alloy comprises, by atomic percent, 25%-35% of Nb, the total content of V and / or Ta smaller than or equal to 3% and the balance Ti, the titanium-niobium-based alloy comprises a three-temperature structure of a low-temperature adaptation area, a normal-temperature stable area and a high-temperature tolerance area, the thickness of the titanium-niobium-based alloy ranges from 1.5 mm to 2 mm, and the surface of the titanium-niobium-based alloy is provided with a nitride layer or a passive film. The preparation method comprises the steps of burdening, 2-3 times of vacuum consumable smelting, hot forging, hot rolling, partition cutting, pre-deformation regulation and control, solid solution quenching, cold rolling finishing, splicing forming and the like, and vacuum stress relief annealing and dual performance detection are matched. The method is suitable for scenes such as chip packaging and precision detection, and is low in cost and high in qualified rate.
Owner:WENTIAN JINGCE INSTR TECH (SUZHOU) CO LTD
A method for manufacturing a super-thick hollow pressure-bearing plate structure
ActiveCN115476115BArc welding apparatusWelding/soldering/cutting articlesButt weldingPre deformation
The application provides a manufacturing method of a super-thick hollow pressure-bearing plate structure, comprising the following steps: dividing the pressure-bearing plate into multiple splicing units and cutting; pre-deforming the butt joint welds between all the splicing units by the vector height distribution of the support tooth plate, and completing the overall assembly of all the splicing units at one time; after the front surface of all the butt joint welds is welded, the pressure-bearing plate is turned over for the first time and the back surface is welded; the welding process adopts CO2 gas protection backing welding and automatic filling and covering welding; the pre-welding preheating temperature is 100-200 DEG C; the backing welding current is 260+ / -20 A, the voltage is 28+ / -2 V, and the welding speed is 300+ / -30 mm / min; the filling and covering welding current is 680+ / -30 A, the voltage is 32+ / -2 V, and the welding speed is 400+ / -40 mm / min; the weld slope adopts a double-sided asymmetric U-shaped slope; the sum of the double-sided fusion depths of the pressure-bearing plate is not less than 2 / 3 of the plate thickness; and the front surface welding depth of the butt joint weld is at least 20 mm before turning over. The manufacturing process is first used without constraint, in a whole set and whole welding manner, and the construction efficiency is considered on the basis of deformation control, and the flatness precision can reach more than 1 mm / m.
Owner:CHINA RAILWAY BAOJI BRIDGE YANGZHOU CO LTD
Automatic power device for material processing and manufacturing method
PendingCN121199695AOther manufacturing equipments/toolsTotal factory controlPre deformationMetallic materials
The invention discloses a material processing automation power device and a manufacturing method, the material processing automation power device comprises a rack, the rack is provided with a constant tension discharging device E1, and the constant tension discharging device E1 is sequentially provided with a correcting and flattening device E2 and a feeding and pre-deformation module E3 backwards; the output end, far away from the correcting and flattening device E2, of the feeding and pre-deformation module E3 is connected with the three-dimensional forming and forging module E4; the three-dimensional forming and forging module E4 is connected with the material taking and clamping transposition module E6 through the motion control and shearing module E5, the accessory embedding and closing module E7 is arranged below the material taking and clamping transposition module E6, and the protective cover and welding module E8 is arranged in front of the material taking and clamping transposition module E6. The device is suitable for precision machining requirements of various metal materials, and the production efficiency and the product consistency are improved.
Owner:郑海宁
High-strength and high-toughness aluminum-lithium alloy plate and preparation method thereof
The invention provides a high-strength and high-toughness aluminum-lithium alloy plate and a preparation method thereof, and belongs to the technical field of metal materials and metallurgy. According to the method, an aluminum-lithium alloy cast ingot with excellent casting performance is cast through alloy elements in scientific proportion and a precise smelting process, most casting defects are eliminated through hot rolling deformation, sufficient machining strengthening is obtained through cold rolling deformation, then two-section pre-deformation is conducted on an aluminum-lithium alloy plate subjected to solution treatment, the dislocation density is increased, and the machining strength of the aluminum-lithium alloy plate is improved. The aging precipitation power of the alloy is remarkably improved, a large number of fine and dispersed T1 (Al2CuLi) phases and theta '(Al2Cu) phase strengthening phases are precipitated in the aging process, the strength, toughness and plasticity of the aluminum-lithium alloy are effectively improved, a destressed high-strength and high-toughness aluminum-lithium alloy plate with the flat appearance is obtained, the yield strength can reach 520-560 MPa, the tensile strength can reach 580-630 MPa, the ductility is 8-12%, and the tensile strength can reach 580-630 MPa. And the use requirements of high-standard aerospace structural materials can be met.
Owner:YICHUN GANFENG LITHIUM IND +1
Ti al alloy, method for deformation heat treatment and application
The application discloses a TiAl alloy, a deformation heat treatment method and application, and the alloy is as follows: Ti-(43-48)Al-(0-8)X-(0-0.5)Z, wherein X is one or two or more of Nb, Mo, Cr, Ta, V and Mn elements; Z is one or two or more of Fe, C, N, O, B and Si elements; the alloy is a fine-grain duplex structure, the fine-grain duplex structure is composed of fine-size sheet group and equiaxial gamma grains; the size of the sheet group is 20-40 mu m, the size of the gamma grain is 10-20 mu m, and the volume fraction of the gamma grain is 30-60%; firstly, high-density crystal defects are generated in the original structure by controlling the deformation temperature, the deformation rate and the deformation amount of the pre-deformation treatment; and then, the fine-grain near-sheet structure or the duplex structure is obtained by controlling the holding temperature and the holding time in the isothermal heat treatment process.
Owner:SICHUAN UNIV
Pre-deformation device with adjusting effect for steel wire production
The utility model relates to the technical field of steel wire production, in particular to a pre-deformation device with an adjusting effect for steel wire production, which comprises a base, one side of the outer wall of the base is movably connected with an access door plate, and a driving mechanism is arranged above the base; the driving mechanism comprises a motor, the motor is embedded in the base, the power output end of the motor is connected with a two-way threaded rod, the outer wall of the two-way threaded rod is slidably connected with a sleeve, the outer wall of the sleeve is fixedly provided with a connecting disc, a fixing block is embedded in the outer wall of the connecting disc, and the front end of the fixing block is fixedly provided with a mounting cylinder; by means of the motor, the bidirectional threaded rod, the sleeve, the connecting disc, the fixing block, the mounting cylinder, the electromagnet, the sliding cylinder, the metal block, the supporting rod and the abutting plate, a steel wire can be automatically clamped, the angle and the range are adjusted, automation is improved, repeated operation or participation of workers is avoided, and the production efficiency is improved.
Owner:TIANHONG STEEL ROPE (NANTONG) CO LTD
Core soil size optimization method based on control of pre-deformation of tunnel face
PCT designated stageWO2025208717A1Geometric CADSpecial data processing applicationsSoil sciencePre deformation
A core soil size optimization method based on control of a pre-deformation of a tunnel face, relating to the technical field of tunnel construction. The method comprises: first determining a tunnel construction scheme, and dividing a section according to a tunnel excavation sequence; and then establishing different reserved core soil size numerical models for simulated excavation calculation, wherein core soil sizes corresponding to the minimum pre-deformation amount are optimal sizes. The method compensates fills the gap in optimization of core soil sizes by considering the influence of the core soil sizes on a pre-deformation of a tunnel face at present, thereby providing a reference for determining core soil sizes in future construction processes using the new Italian tunneling method.
Owner:NORTHEASTERN UNIV CHINA
A composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloy
PendingCN122256849Ahigh strengthImprove plasticityFurnace typesHeat treatment furnacesSolution treatmentPre deformation
This invention discloses a composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloys, belonging to the field of aluminum-lithium alloy preparation technology. The composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloys of this invention includes the following steps: (1) performing solution treatment, water quenching, and natural aging treatment on the aluminum-lithium alloy in sequence; (2) performing pre-deformation treatment on the aluminum-lithium alloy treated in step (1); (3) performing non-isothermal aging treatment on the aluminum-lithium alloy treated in step (3); wherein, the pre-deformation amount of the pre-deformation treatment is 4~10%; the non-isothermal aging treatment is to first raise the temperature from 40℃ to 140~200℃ and then lower the temperature to 100~160℃; the aluminum-lithium alloy treated by the composite deformation heat treatment process of this invention has both good mechanical properties and corrosion resistance.
Owner:XIAN AERONAUTICAL POLYTECHNIC INST
Composite material thermal forming method based on thermal activation topology reconstruction
The invention relates to the technical field of hot forming, and discloses a composite material hot forming method based on thermal activation topology reconstruction, which comprises the following steps: S1, material pretreatment; s2, topological structure design: pre-deformation is applied to the blank at the temperature above the glass-transition temperature of the base material, and programmed cooling is performed to lock stress after a temporary topological configuration is formed through mold constraint; s3, a thermal activation stage: heating the programmed blank to an activation temperature interval; s4, dynamic reconstruction forming: guiding a material molecular chain and a reinforced phase to be dynamically rearranged in a thermal activation state to form a target topological structure; s5, topology locking: fixing the reconstructed topological structure through gradient cooling or cross-linking curing; s6, machining and performance testing are conducted on the formed part; through interface modification technologies such as treating carbon fibers with a silane coupling agent and treating silicon nitride particles with oxygen plasma, a high-bonding-strength and low-defect blank foundation is provided for subsequent hot forming, and the interface performance is improved.
Owner:ZHENGZHOU UNIV
Short-process preparation method and application of difficult-to-deform high-temperature alloy bar based on gradient cyclic temperature change
The invention belongs to the technical field of preparation of difficult-to-deform high-temperature alloy materials, and particularly relates to a short-process preparation method and application of a difficult-to-deform high-temperature alloy bar based on gradient cyclic temperature change. The preparation method comprises the following steps: preparing a difficult-to-deform high-temperature alloy ingot by adopting a triple smelting process; the hard-to-deform high-temperature alloy cast ingot prepared in the first step is subjected to pre-deformation treatment and then air-cooled to the room temperature; carrying out homogenization treatment on the alloy ingot subjected to the pre-deformation treatment in the step 2; the alloy ingot obtained after homogenization treatment in the fourth step is subjected to cogging forging through the gradient circulation temperature changing technology, and an intermediate billet is obtained; and the intermediate blank obtained in the fourth step is forged through a gradient cooling technology, and the high-temperature alloy bar difficult to deform is obtained. The preparation method disclosed by the invention has the advantages of high structure uniformity and short-period preparation, and also has high yield. The method is suitable for industrial mass production of high-temperature alloy bars, and the bars can be used for preparing turbine discs of aero-engines.
Owner:西部超导材料科技股份有限公司 +1
Pre-deformation clamping system and workpiece machining method
A pre-deformation clamping system and workpiece machining method are disclosed. The pre-deformation clamping system includes a fixing module and a prestressing application module. The fixing module is configured to fix a fixed part of the workpiece. Multiple prestressing application modules are provided, each configured as a clamping part for clamping the workpiece. Each prestressing application module is configured to adjust the vertical position of its clamping part, thereby applying prestress to the workpiece to induce pre-deformation. The technical solution provided by the embodiments of this application can effectively improve the machining accuracy of the workpiece.
Owner:TSINGHUA UNIVERSITY +1
Forging forming method for improving strain uniformity of special-shaped alloy forge piece with thick and large area
The invention relates to a forging forming method for strain uniformity of a special-shaped alloy forge piece with a thick and large area, and belongs to the technical field of large-size magnesium alloy forging. Preparing a blank; uniformly spraying a lubricant on the surface of the blank; the blank, the steel plate and the mold are placed in a heating furnace to be preheated; a die is installed, then the blank is placed on the female die, and a steel plate is installed on the blank; driving the male die to press down the steel plate, and performing upsetting deformation on the blank; removing the steel plate, and directly performing die forging on the blank by using a male die to complete the preparation of a forge piece; and demolding and cooling the special-shaped forge piece. According to the method, the metal flowing direction is changed by conducting upsetting pre-deformation on the concave blank, the deformation dead zone is eliminated, the phenomenon that a microstructure is difficult to refine due to insufficient deformation of a lateral thick zone is restrained, and finally the magnesium alloy special-shaped component without the deformation dead zone is formed through die forging.
Owner:HARBIN INST OF TECH
Pre-deformation device for steel cord
Owner:JIAXING DONGFANG STEEL CORD CO LTD
Crack inhibition method for laser cladding composite coating based on pre-deformed substrate
The invention discloses a crack inhibition method for a laser cladding composite coating based on a pre-deformed substrate, and relates to the technical field of laser additive manufacturing. The method comprises the following steps: firstly, predicting a deformation field and a residual stress field of a substrate during laser cladding of a specific coating material under non-rigid constraint through numerical simulation, and calculating the required pre-deformation compensation amount according to the deformation field and the residual stress field; then, the pre-deformation compensation amount is applied to the deformable substrate, so that the deformable substrate is in a pre-bending or pre-torsional deformation state. And laser cladding is carried out on the pre-deformed substrate, and thermal stress generated in the cladding process and preset deformation energy of the substrate can offset each other, so that effective release of residual stress and accurate control of macroscopic deformation of the component are synchronously realized. According to the method, the coating stress can be reduced, crack initiation can be inhibited, and the industrial problem that stress control and shape precision in traditional laser cladding are difficult to consider at the same time is solved.
Owner:NORTHEASTERN UNIV CHINA
Control method for forging 6-series aluminum alloy hub coarse grains and application
The invention provides a control method for forging 6-series aluminum alloy hub coarse grains and application. Comprising the following steps that S1, an aluminum alloy material subjected to pre-deformation and homogenization treatment is heated to 400-500 DEG C, and heat preservation is conducted; s2, preheating a forging die to 350-460 DEG C, and locally cooling the surface of a die cavity of a part, used for forming the hub, in the die, the temperature of the surface of the die cavity is 50-100 DEG C lower than that of the other parts of the die; the parts for forming the hub comprise the die cavity parts corresponding to corner areas at the joints of the spokes and the rim and the die cavity parts corresponding to spoke plate thickness transition areas between the adjacent spokes; and S3, the heated aluminum alloy material is placed in the die treated in the step S2 to be forged and formed. The technical problems that in the production process of an existing 6xxx series aluminum alloy forged hub, coarse grains are likely to appear, and then the mechanical property of a product is uneven, the fatigue life is shortened, and the yield is low are solved.
Owner:YANSHAN UNIV +1
Heat treatment method for weakening wrought magnesium alloy texture and magnesium alloy plate
The invention provides a heat treatment method for weakening a wrought magnesium alloy texture and a magnesium alloy plate, and belongs to the technical field of magnesium alloy heat treatment. The method comprises the following steps: pre-deformation treatment: carrying out compression pre-deformation on a wrought magnesium alloy plate in the transverse direction and the rolling direction in sequence at room temperature so as to introduce stretching twin crystals; and heat treatment is conducted, specifically, annealing heat treatment is conducted on the wrought magnesium alloy plate subjected to pre-deformation treatment. The temperature of the annealing heat treatment ranges from 280 DEG C to 300 DEG C, and the time of the annealing heat treatment ranges from 10 minutes to 20 minutes. According to the invention, beneficial result dominated by twin crystals is ensured; 100 gt; the perpendicular-to-ND texture component can be stably retained, the loss of the texture weakening effect or the formation of a new strong texture is avoided, and the durability and stability of the treatment effect are ensured.
Owner:UNIV OF SCI & TECH BEIJING
A heat treatment method for high-strength aluminum alloy deformation and phase change synergistic strengthening
The application provides a heat treatment method for deformation and phase change synergistic strengthening of high-strength aluminum alloy, and relates to the technical field of aluminum-based alloy heat treatment. The method comprises the following steps: S10, solid solution treatment of the aluminum alloy at a solid solution temperature, quenching treatment after the solid solution treatment, and obtaining W-state aluminum alloy; S20, pre-aging treatment of the W-state aluminum alloy at a pre-aging temperature, and obtaining PA-state aluminum alloy after cooling; S30, 0-8% pre-deformation of the PA-state aluminum alloy, and obtaining pre-hardening treatment aluminum alloy; S40, first-stage aging treatment of the pre-hardening treatment aluminum alloy at a first aging temperature for 1-60 min, and obtaining first-stage aluminum alloy after cooling; wherein the first aging temperature is lower than the pre-aging temperature; S50, second-stage aging treatment of the first-stage aluminum alloy at a second aging temperature for 1-60 min, and obtaining second-stage aluminum alloy after cooling; wherein the second aging temperature is lower than the first aging temperature.
Owner:WUHAN UNIV OF TECH
Extrusion die
The utility model discloses an extrusion die, and relates to the technical field of die design, in particular to an extrusion die which comprises a pre-deformation cavity and a shaping cavity which are arranged in a die main body and communicated with each other, and the projection area of the pre-deformation cavity in the axial direction of the die is larger than that of the shaping cavity in the axial direction of the die. According to the extrusion die, the pre-deformation cavity is additionally arranged in the die, and the metal flow velocity of a bar in the die is regulated and controlled, so that the flow velocity difference of extruded metal at different parts of a metal fin profile is reduced, and the extrusion efficiency is improved. And the structure property difference of each part is reduced.
Owner:CHINALCO MATERIALS APPL RES INST CO LTD
A creep forming pre-deformation method for ultra-large thin-walled parts
This invention relates to a creep-forming pre-deformation method for ultra-large thin-walled parts. The method includes: processing a grid onto a blank sheet to obtain a wall panel; completely covering the wall panel with a breathable felt; placing the wall panel on a mold; calculating the size of a vacuum bag and determining the bridging position based on the stress characteristics of the vacuum bag; sealing the vacuum bag, with the outer periphery of the vacuum bag extending outwards from the mold; evacuating the enclosed space until a first preset pressure value is reached, then placing the panel in an autoclave; maintaining the pressure until the wall panel deforms to the target size when the first preset pressure value rises to a second preset pressure value. The creep-forming pre-deformation method for ultra-large thin-walled parts provided in this application utilizes atmospheric pressure to apply pressure to the sheet material, determines the bridging position based on the stress characteristics of the vacuum bag, ensuring uniform stress area on the wall panel, and by changing the air pressure, adjusting the pressure value, the product gradually transforms from elastic deformation to plastic deformation, resulting in uniform deformation.
Owner:HUNAN ZHONGCHUANG AEROSPACE NEW MATERIAL CO LTD
A heat treatment method to improve the superelasticity and fatigue resistance of NiTi scaffolds
InactiveCN122081830AEliminate stress mutation pointsInhibition of fatigue cracksFurnace typesHeat treatment process controlThermodynamicsPre deformation
This invention relates to the field of general methods and equipment control technology for heat treatment of ferrous or non-ferrous metals or alloys, and discloses a heat treatment method for improving the hyperelasticity and fatigue resistance of NiTi scaffolds. The method includes: loading the NiTi scaffold onto a radial constraint unit; applying a pre-deformation amount and injecting a cyclic compensation load within the aging temperature range using a load pressurization mechanism; acquiring feedback load parameters characterizing the driving impedance of the mechanism in real time, calculating its real-time slope evolution over time, and adjusting the displacement loading rate according to the real-time slope change to convert the cyclic compensation load into an asymmetric pulse load; monitoring real-time slope fluctuations, maintaining interfacial contact pressure and controlling the cooling rate when it enters a stable threshold range, and locking the oriented microstructure. This invention, by introducing a load feedback closed-loop mechanism and utilizing the numerical alignment of the dynamic pulse waveform with the microstructure evolution rate, breaks the random nucleation law of the strengthening phase, induces the strengthening phase to generate a preferred orientation, and enhances the hyperelastic stability of the material.
Owner:HUNAN RUIKANTONG TECH DEV CO LTD
Composite material paddle fan blade pre-deformation method
The invention relates to the technical field of aviation paddle fan engine blade design, in particular to a composite material paddle fan blade pre-deformation method which comprises the steps that a thermal-state blade deformed under the action of aerodynamic force and centrifugal force is obtained; geometric section control point coordinates of the pre-deformation transition blade are obtained; obtaining a three-dimensional geometric profile of the pre-deformed transition blade with the middle cambered surface; obtaining a composite material paddle fan blade with solid characteristics; and obtaining a final pre-deformed blade. According to the method, rapid and accurate pre-deformation design of the composite material paddle fan blade is achieved, the refinement level of pneumatic design of the composite material paddle fan blade is effectively improved, the design period is shortened, and the research and development efficiency is improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
A method for preparing full beta phase fine grain / super fine grain titanium alloy based on alpha" martensite reverse phase change
ActiveCN117070870BRoll force/gap control deviceIncreasing energy efficiencyMicron scaleMartensite transformation
The application discloses a method for preparing full beta phase fine grain / superfine grain titanium alloy based on alpha" martensite reverse phase change, and is characterized in that the method comprises the following steps: firstly, pre-deforming titanium alloy is obtained by rolling bulk metastable beta titanium alloy at room temperature; secondly, short-time annealing heat treatment is carried out; thirdly, secondary rolling is carried out at room temperature; and fourthly, fine grain / superfine grain titanium alloy is obtained by secondary short-time annealing heat treatment. In the application, micron-level alpha" martensite laths are introduced by pre-deformation, reverse phase change of alpha" to beta is realized by combining with primary short-time annealing heat treatment, the size of beta phase grains is reduced, then nanometer-level alpha" martensite phase is introduced by secondary rolling, the size of beta phase grains is further reduced by taking the alpha" martensite phase as the nucleation core of beta grain recrystallization, and finally, fine grain / superfine grain titanium alloy is obtained by combining with secondary short-time annealing heat treatment. The titanium alloy has beta single-phase organization, the minimum grain size is submicron, the superelasticity performance of the titanium alloy is improved, and the titanium alloy is suitable for metastable alloy with deformation martensite phase change.
Owner:NORTHWEST INSTITUTE FOR NONFERROUS METAL RESEARCH
NiTiNbTa shape memory alloy material and preparation method thereof
The invention discloses a NiTiNbTa shape memory alloy material and a preparation method thereof, belongs to the field of shape memory alloy materials, and particularly relates to the NiTiNbTa shape memory alloy material and the preparation method thereof. The invention aims to solve the problems that the traditional NiTiNb wide-lag shape memory alloy is high in cost and the phase transition temperature is difficult to regulate and control. The material comprises 49.5 parts of Ni, 44.5 parts of Ti, 4.5 parts of Nb, 1.5 parts of Ta, 49.5 parts of Ni, 45.5 parts of Ti, 5.5 parts of Nb, 0.5 part of Ta or 49.5 parts of Ni, 45.5 parts of Ti, 5.5 parts of Nb and 1.5 parts of Ta. The method comprises the following steps: carrying out electric arc melting, carrying out solution treatment on a smelted cast ingot, and carrying out water quenching to obtain the alloy with uniform components. The obtained material can obtain remarkable wide thermal hysteresis without depending on complex pre-deformation pretreatment, and also has an excellent shape memory effect. In addition, the phase transition temperature of the alloy can be adjusted through alloy components, and the alloy can be suitable for different application scenes.
Owner:HARBIN UNIV OF SCI & TECH