30 results about "Artificial aging" patented technology

The application provides a high-strength rare earth magnesium alloy based on a room-temperature rotary swaging composite process and a preparation method thereof.The method comprises the following specific steps: according to designed components, raw materials are smelted to obtain a semi-continuous casting ingot, the rare earth magnesium alloy ingot is subjected to homogenization treatment, then is preheated and kept warm to be subjected to differential temperature extrusion, the extruded rare earth magnesium alloy is subjected to multi-pass rotary swaging treatment with a small deformation at room temperature, and finally is subjected to artificial aging treatment.Through the composite process with the room-temperature rotary swaging, the grains can be refined, the texture can be improved, and a large number of dislocations and twins can be introduced into the grains, so that the nucleation sites and precipitation power of precipitated phases in the aging process are improved, the aging strengthening capacity is more excellent, and the high-strength rare earth magnesium alloy is obtained.The application of the light-weight high-strength rare earth magnesium alloy in the fields of aerospace, rail transportation and automobiles can be accelerated.

A kind of Al-Zn-Mg high-strength aluminum alloy laser-MIG composite welding method based on adjustable swing frequency, the method comprises the following steps: welding preparation, the surface of Al-Zn-Mg high-strength aluminum alloy to be welded workpiece needs to be polished, cleaned and dried to remove oxide film, dirt and other impurities;Welding process parameter setting and execution, the swing frequency of laser beam is adjusted during welding, and the synergistic effect of MIG arc is used to realize the precise control of molten pool flow behavior;Welding post-processing, artificial aging or natural aging method is used for post-welding treatment to eliminate welding residual stress and improve joint mechanical properties.The invention optimizes the swing frequency parameter, effectively suppresses the defects such as hot crack and porosity that easily occur during welding of Al-Zn-Mg high-strength aluminum alloy, significantly improves the strength and corrosion resistance of the welded joint, and is suitable for the welding requirements of high-performance aluminum alloy components in the fields of aerospace, rail transportation, etc.

The application provides an aluminum alloy heat treatment method, comprising the following steps: solution treatment: solution treating T6 state aluminum alloy rolling plate at 520 DEG C for 1h, and water cooling to normal temperature; pre-aging treatment: pre-aging treating the plate after solution treatment at 90 DEG C for 1h, and air cooling to room temperature to obtain the plate after pre-aging treatment; artificial aging treatment: artificial aging treating the plate after pre-aging treatment at 175 DEG C for 4h-12h, and air cooling to room temperature. The aluminum alloy heat treatment method of the application firstly solution treats T6 state aluminum alloy rolling plate, pre-ages treats the plate, obtains the aluminum alloy plate after pre-aging treatment, and then artificially ages the aluminum alloy plate after pre-aging treatment for 4h to reach the hardness of the commercially available T6 state aluminum alloy plate, so that the formability and strength of the aluminum alloy are considered, the heat treatment time is saved, and the production cost is reduced.

This invention relates to the field of coating technology, specifically to a weather-resistant powder coating for doors and windows and its preparation method. The coating comprises polyester resin, β-hydroxyalkylamide curing agent, titanium dioxide, barium sulfate, and gradient shell nano-zinc oxide powder. The gradient shell consists of a silane layer, a triazine ring interface structure, hindered amine light-stabilizing groups, and an organic shell, which enhances the dispersibility and UV shielding function of the nanoparticles through chemical bonding. The preparation method includes masterbatch premixing, melt extrusion, and grinding and sieving. Tests show that the coating exhibits high gloss retention, minimal color difference, and excellent corrosion resistance and mechanical properties after artificial aging.

The present application belongs to the technical field of aluminum alloy heat treatment, and discloses a composite deformation heat treatment method for inhibiting natural aging of aluminum alloy for automobiles and improving artificial aging response. The method comprises the following steps: 1) heat preservation, rapid cooling, cold rolling, and completion of pre-deformation of the rolled deformed aluminum alloy plate; 2) heat preservation and completion of intermediate pre-aging of the alloy plate after the pre-deformation; 3) cold rolling and completion of post-deformation of the alloy plate after the intermediate pre-aging; and 4) placing the alloy plate after the post-deformation at room temperature, heat preservation, and completion of final aging. The method of the present application inhibits the formation of atom clusters at room temperature in the natural aging process, promotes the precipitation of strengthening phase in the artificial aging process, fully plays the dispersion strengthening effect, realizes significant artificial aging response, and maintains a high response amount after the natural aging, especially the tensile strength is significantly improved, and excellent plasticity is exhibited. The present application is easy to mass produce.

The application belongs to the field of light high-conductive metal materials, and relates to a high-conductive aluminum alloy material for a new energy automobile bus conductor and a preparation method of the bus conductor. The aluminum alloy material is composed of: aluminum 97.22-99.35%, magnesium 0.35-0.8%, silicon 0.3-0.7%, iron ≤0.5%, lanthanum or cerium 0.05-0.3%, titanium ≤0.1%, manganese ≤0.03%, chromium ≤0.03%, copper ≤0.1%, boron ≤0.06%, and zinc ≤0.1%. The method takes 6101 aluminum alloy as a base material, and solves the profile cracking problem of the high-conductive aluminum alloy in the large-curvature deformation process through a process flow of trace element regulation, multi-stage strong cold crystallization, soaking rolling deformation, solid solution stress relief annealing, three-dimensional bending forming and artificial aging treatment. The application purifies the alloy melt, refines the alpha-Al grains and improves the strength and plasticity of the alloy through the composite addition of rare earth elements La or Ce and refining agents. The mechanical properties, conductive properties and good three-dimensional bending properties of the high-conductive aluminum alloy are simultaneously up to the standards.

This invention belongs to the field of aluminum alloy hot working and heat treatment technology, specifically disclosing a heat-resistant Al-Cu-Mg-Mn aluminum alloy, its preparation method, and its applications. The aluminum alloy composition of this invention includes Cu, Mg, Mn, Zn, Cr, Zr, and Ti, with the balance being Al, targeting medium-temperature load-bearing applications at 250–300℃. The process of this invention does not rely on adding high-cost elements or rapid solidification and additive manufacturing as the main technical route. Instead, it introduces a pre-forging process after the alloy casting billet is completed and before homogenization treatment. This process breaks down and reconstructs the continuous coarse second-phase skeleton in the casting state, forming dislocations, subgrain boundaries, and local high-strain zones in the matrix. Subsequently, through graded homogenization, hot extrusion, two-stage solution treatment, and artificial aging, high-density, fine, and uniform precipitation of the T-phase is induced. This method can be integrated with conventional casting, forging, extrusion, and heat treatment equipment, and is suitable for medium-temperature heat-resistant load-bearing components in aerospace and transportation equipment.

This invention discloses a process for reducing residual stress inside aluminum alloy sheets, specifically relating to the field of non-ferrous metal processing. The process includes the following steps: Step S1 solution quenching, Step S2 stretching, Step S3 incomplete annealing, and Step S4 artificial aging. This invention creatively introduces an incomplete annealing process, located after stretching and before aging, into the traditional solution quenching-stretching-aging process. This process is not a simple low-temperature tempering, but rather a precisely controlled low-temperature recovery process specifically designed to effectively eliminate the micro-stress remaining inside the sheet after stretching. This achieves a dual reduction of macro- and micro-stress, lowering the overall residual stress level of the sheet. Due to the extremely low internal residual stress, the stress release during subsequent large-mass milling, turning, drilling, and other machining operations is minimal, avoiding deformation problems such as warping, bending, and twisting caused by stress release.

The application relates to a green recycling preparation method of a high-strength easy-to-form aluminum alloy sheet and an aluminum alloy sheet prepared by the method, wherein the chemical composition of the aluminum alloy sheet is as follows in mass fraction: Si 0.80-1.20%, Mg 1.00-1.50%, Fe 0.20-0.30%, Cu 0.25-0.55%, Mn <=0.20%, Ti 0.015-0.025%, and the balance is aluminum and inevitable impurities; the preparation method is that more than 80% of recycled aluminum is heated and melted with an intermediate alloy or an additive, and then subjected to smelting, casting, homogenization-preheating integrated heat treatment, hot rolling, cold rolling, solid solution quenching, aging, cold rolling, artificial aging and cleaning and straightening; the thickness of the aluminum alloy sheet is 0.15-0.50 mm, the tensile strength is >=300 MPa, the yield is >=270 MPa, the elongation is >=8%, 180-degree bending is achieved without cracking, and the bending radius R is <=0.5 mm.

The application provides a TiB 2p / Al-Mg-Si porcelain duralumin alloy, a preparation method and application thereof, the method comprises the following steps: component design; smelting: simultaneously heating and melting Al-5%TiB2 precursor and Al-3%B intermediate alloy, ultrasonic vibration treatment, heat preservation, alloying, refining, pouring; solid solution treatment; and the TiB 2p / Al-Mg-Si porcelain duralumin alloy is prepared after artificial aging treatment. Compared with the pure alloy, the TiB 2p / Al-Mg-Si porcelain duralumin alloy of the application has the peak aging region widening effect, the process window of artificial aging is widened, and the best mechanical property and electrical conductivity are obtained.

This application relates to the field of building decoration materials, and in particular to a crack-resistant metallic paint and a high-strength steel plate crack-resistant component, as well as their construction method. A crack-resistant metallic paint comprises the following raw materials in parts by weight: 300-500 parts fluorocarbon emulsion, 80-120 parts elastic emulsion, 10-40 parts active toughening agent, 90-110 parts metallic effect pigment, 30-40 parts film-forming aid, 1.5-2.5 parts dispersant, 15-20 parts thickener, and 280-350 parts water. By compounding the fluorocarbon emulsion and elastic emulsion and adding the active toughening agent, the paint film achieves an elongation at break ≥82%, a flexibility of 1mm without cracking on a shaft, and resistance to artificial aging ≥3000h without cracking, thus achieving a synergistic unity of high elasticity and high weather resistance.

Disclosed is a forging method for a high-silver aluminum alloy and a high-silver aluminum alloy forged part are provided. The forging method comprises the following steps: heating the high-silver aluminum alloy to 440° C. to 500° C., and holding for 8 to 16 hours to obtain a blank; preheating a contact portion of a forging anvil, a tong or a die with the blank to 300° C. to 480° C., and holding in the process of transferring the blank to a press; carrying out six-upsetting six-stretching multidirectional forging deformation on the blank, thus obtaining a forging blank, wherein the final forging temperature is 360° C. to 400° C.; and carrying out forming forging treatment on the forging blank, and then carrying out solid solution treatment, residual stress elimination and artificial aging treatment in sequence.

The application provides a TiB2 particle reinforced high-elongation 6201 porcelain aluminum alloy, a preparation method and application thereof, and the preparation method of the TiB2 particle reinforced high-elongation 6201 porcelain aluminum alloy comprises the following steps: smelting: TiB2 / Al precursors and Al-3% B intermediate alloy are proportioned according to a B / Ti stoichiometric ratio of 2.0-2.1, and are simultaneously put into a smelting furnace for heat preservation reaction, then alloying, degassing and ultrasonic melt treatment are carried out, and then the melt is poured into a steel mold; homogenization treatment; extrusion; solid solution treatment, room temperature water quenching; rolling; and artificial aging treatment, so that the TiB2 particle reinforced high-elongation 6201 porcelain aluminum alloy is prepared. The preparation process is simple, and the cost is low. The prepared conductive aluminum material has excellent mechanical properties, wherein the tensile strength is close to 370 MPa, and the elongation after fracture is more than 10%, and can be used for preparing high-elongation power transmission conductors.

The application provides a time-aging temperature optimized La-Sr composite modification A356 aluminum alloy and a preparation method, and belongs to the technical field of metal material processing and heat treatment. The application takes aluminum ingots with a purity of 99.5%, magnesium ingots with a purity of 99%, Al-16Si intermediate alloy, Al-10Sr intermediate alloy and Al-20La intermediate alloy as raw materials, melts the aluminum ingots first, then adds the Al-16Si intermediate alloy, and then adds the Al-10Sr and Al-20La intermediate alloy in sequence, and after complete melting, is placed, finally, adds the magnesium ingot, pours after stirring, placing, degassing and deslagging, and obtains a cast alloy; the obtained cast alloy is subjected to solid solution treatment at 540 DEG C, and after heat preservation for 4 hours, is quenched in water at 70 DEG C; the alloy after solid solution quenching is subjected to artificial aging treatment, the aging temperature is 180 DEG C, the aging time is 24 hours, and after completion, is taken out of the furnace and air cooled. The application significantly improves the tensile strength, elongation and comprehensive strength and toughness of the alloy, thereby effectively maintaining the plasticity while significantly improving the strength, and achieving the best matching of the strength and toughness.

This invention discloses a wood-plastic co-extruded profile with a textured pattern and its preparation method. The profile is produced by co-extruding a core layer and a surface layer. By adding color powder and textured masterbatch to the surface layer, combined with a special feeding process, the extruded profile can produce random stripes, more closely resembling the texture of natural wood. Maleic anhydride-grafted polyethylene is added as a compatibilizer to both the core layer and the surface layer, significantly improving the interfacial bonding between wood flour or reed powder and the plastic matrix, and increasing peel strength. The core layer uses recycled HDPE as the matrix, reducing production costs and conforming to the concept of a circular economy. The profile produced by this invention has good dimensional stability, a bending strength of over 25 MPa, a surface electrostatic voltage of no more than 3 kV, and after 3000 hours of accelerated artificial aging, the product appearance shows no significant change, and the mechanical property retention rate exceeds 90%.

This invention relates to the field of alloy technology, and more particularly to a recycled aluminum alloy rod made from waste aluminum and its preparation method. The method includes: firstly, pretreating and smelting mixed waste aluminum, followed by homogenization, hot extrusion, quenching, and artificial aging to obtain a bare T6-state recycled aluminum alloy rod; then, preparing a complex precursor sol using tannic acid, yttrium salt, and hexamethylenetetramine, impregnating and curing the bare rod surface after pretreatment, and finally cleaning, straightening, and dimensional determination to obtain the finished product. This invention effectively improves mechanical properties, corrosion resistance, and coating adhesion through process optimization of the matrix structure and coating preparation.

A method for manufacturing an aluminum alloy sheet or plate is provided, comprising: a step of casting an alloy, wherein the alloy has a composition comprising the following elements and weight percentages: 6.80 to 10.00 wt% Zn, 2.20 to 3.50 wt% Mg, 1.30 to 4.00 wt% Cu, 0.01 to 0.30 wt% Sc, and 0.05 to 0.20 wt% Zr; a step of cold rolling the aluminum alloy sheet or plate at room temperature under a reduction of about 5% to about 20% per pass; a step of subjecting the sheet or plate to solution heat treatment by heating the sheet or plate to a temperature of about 400°C to 500°C; a step of quenching the sheet or plate; and a step of performing artificial aging hardening by heating the sheet or plate to a temperature of about 80°C to 200°C and maintaining the sheet or plate at this temperature for a period of about 30 minutes to 100 hours.

The application discloses a production method of 6061-T651 aluminum alloy thick plate and relates to the technical field of aluminum alloy manufacturing. The production process of the aluminum alloy thick plate comprises the following steps: melting and casting, face milling, solid solution and homogenization heat treatment, hot rough rolling, online quenching, shearing, stretching, artificial aging and plate sawing. The solid solution and homogenization integral heating, hot rough rolling opening rolling temperature, reduction, rolling speed and non-use of emulsion cooling are reasonably designed, the plate temperature in the hot rough rolling and transfer process is controlled to be above the solid solution degree curve, the online quenching operation is carried out, the plate with a high supersaturation solid solution state is obtained, the plate is further sheared to a fixed size, pre-stretched, artificially aged and sawed to obtain the finished plate. The reasonable matching of the process flow and process parameters is used for the 6061-T651 aluminum alloy thick plate with a thickness of 20-150 mm, the separate homogenization treatment of the ingot and the plate temperature compensation process after the hot rough rolling are omitted, the production energy consumption is reduced, and the production cycle is shortened.

This invention belongs to the technical field of recycled aluminum alloys, and discloses a method for simultaneously improving the machinability and thermal conductivity of recycled high-Fe content Al-Mg-Si based aluminum alloys. The method involves: 1) remelting the recycled high-Fe content Al-Mg-Si based aluminum alloy, microalloying treatment, slag removal, refining, and casting; then high-temperature homogenization annealing, immediately followed by large-deformation hot rolling, rapid quenching, room-temperature rolling, and artificial aging treatment to obtain the final recycled aluminum alloy; the large-deformation hot rolling refers to directly rolling the aluminum alloy sheet with a large deformation of 30-40% after removing it from the homogenization furnace; the total time for the aluminum alloy sheet to be removed from the homogenization furnace, hot rolled, and quenched does not exceed 12 seconds. This method achieves high strength while simultaneously improving the thermal conductivity and machinability of the aluminum alloy, meeting the high-end requirements of new energy vehicle heat sink shells, precision structural components, etc.

This invention belongs to the field of metallic materials technology, specifically relating to a method for controlling the type and size distribution of precipitated phases in aluminum-lithium alloys. The method includes cold-rolling pre-deformation treatment of annealed aluminum-lithium alloy sheets, solution treatment at 530°C for 1 hour to precipitate precipitate phase A, and solution treatment at 550°C for 2 hours to precipitate precipitate phase B. This method eliminates the need for artificial aging; it achieves control over the distribution of precipitated phases solely through solution treatment, which is an essential step before aging. The distribution of precipitated phases in aluminum-lithium alloy sheets treated according to this method shows significant differences, effectively controlling the type and size distribution of precipitated phases in the aluminum-lithium alloy. TEM analysis confirms the type and size of precipitated phases precipitated after treatment with this method on different aluminum-lithium alloy sheets.

This invention relates to the field of metal plastic forming technology, specifically disclosing a method for selective rolling and gas expansion forming of 7B04 aluminum alloy ribbed wall panels. The method includes the following steps: preparing two 7B04 aluminum alloy plates, determining the rolling area based on the rib distribution, and performing solution treatment; stacking the plates and spraying a weld inhibitor on the rib area of ​​the contact surface; performing localized multi-pass rolling on the rolling area in a rolling die, with a total reduction of 40%-60%, to achieve pre-forming; transferring the pre-formed double-layer plates to a gas expansion forming die, sealing the die, heating to 400-500℃ and holding at that temperature, and filling the sealed cavity between the plates with high-pressure inert gas, loading at a rate of 0.05-0.2 MPa / min to 3-5 MPa and holding the pressure to achieve plate forming; and performing solution treatment and artificial aging on the formed wall panel to obtain T6 state mechanical properties. This method effectively reduces the overall deformation of subsequent gas expansion forming through selective rolling pre-forming, enabling precise forming of the integral ribbed wall panel while ensuring good dimensional accuracy and comprehensive mechanical properties of the component.

This invention relates to the field of forging processing, specifically a method for reducing machining stress in the internal hole machining of ultra-long and ultra-large cross-section Cr-Ni-Mo alloy steel shaft forgings. The internal hole machining process of the shaft forging is performed in the following steps: after heat treatment, the shaft forging undergoes hot straightening, a first stress-relief tempering, nesting the internal hole, a second stress-relief tempering, rough boring of the internal hole, a third stress-relief tempering, semi-finish boring of the internal hole, vibration aging, artificial aging, and finish boring of the internal hole to the final machined diameter. This invention addresses the machining requirements of the stern shaft of ultra-large ships, effectively reducing machining deformation caused by machining stress and ensuring the high precision requirements of the shaft forging.

The application is a kind of aluminum lithium alloy precision forging process, which comprises the following steps: (1) open forging; (2) blank making; (3) pre-forging; (4) final forging; (5) solid solution and quenching; (6) precision die forging; (7) aging, wherein the open forging is divided into three steps: the first step: high temperature forging, the blank heating temperature T1 = 350-420 DEG C, the forging ratio is not less than 4; the second step: medium temperature forging, the blank heating temperature T2 = 190-280 DEG C, the forging ratio is not less than 4; the third step: high temperature forging, the blank heating temperature T3 = 440-460 DEG C, the forging ratio is not less than 5, after the process parameters of the forging, pre-forging, final forging, solid solution and quenching heat treatment, precision die forging and artificial aging, the precision forgings are made, which have the characteristics of high size precision, small machining amount and excellent performance. The application is suitable for the production of forgings in the fields of aerospace, nuclear industry, transportation, sports goods, weapons and the like.

The invention relates to an aluminium material for the manufacture of high-strength, soldered components comprising an aluminium alloy of the type AlMgSi, in particular of the type AA6xxx, wherein the aluminium material is at least in some areas directly or indirectly in materially-bonded contact with at least one solder layer after soldering. The object of providing an aluminium material which not only provides good soldering properties and good formability, but also provides high strength, is achieved in that the aluminium alloy of the aluminium material has a solidus temperature Tsol of at least 595° C. and the aluminium material has an increase in the yield strength Rp0.2 compared to the state after soldering of at least 90 MPa, preferably at least 120 MPa, after soldering at at least 595° C. and cooling at an average cooling rate of at least 0.5° C. / s from 595° C. to 200° C. and an artificial ageing at 205° C. for 45 minutes.

The present application belongs to the technical field of aluminum alloy plate, and discloses a composite treatment method for inhibiting natural aging of aluminum alloy plate and improving artificial aging response and strength. The method comprises the following steps: S1) Zn and La composite alloying treatment is performed on aluminum alloy melt; then, a cast ingot is prepared, homogenization treatment, hot rolling, cold rolling and solid solution treatment are performed, and a supersaturated solid solution plate is obtained; S2) the supersaturated solid solution plate is cold-rolled to complete pre-deformation; and S3) the alloy plate after pre-deformation is subjected to natural aging and artificial aging treatment to complete final aging. The method fully utilizes the interactive effect of La and Zn element composite and pre-deformation, fully inhibits the formation of room temperature atom clusters in the natural aging process, promotes the precipitation of strengthening phase in the artificial aging process, so that the alloy has a significant artificial aging response, the strength and hardness of the alloy after response are significantly improved, and excellent plasticity is exhibited. The present application is easy to mass produce.

The application relates to the field of aluminum alloy material processing and heat treatment, and discloses an aluminum alloy plate production process, which comprises the following steps: uniformly treating, rolling and solid-solution treating an aluminum alloy ingot; sending the plate after the solid-solution treatment into a partition quenching area, dividing the plate into multiple quenching partitions along the width direction of the plate, collecting cooling temperature data of each quenching partition, and determining thickness equivalent temperature data in combination with the plate thickness; determining equivalent heat history values of each quenching partition in a precipitation sensitive temperature zone according to the thickness equivalent temperature data, and adjusting the spraying intensity of the corresponding quenching partition according to the equivalent heat history values, so as to reduce the heat history difference between different quenching partitions; and when a heat history dispersion coefficient meets preset requirements, performing pre-deformation, partition pre-aging and final artificial aging treatment on the plate. The application can improve the problem of uneven quenching heat history of wide or medium-thick aluminum alloy plates.

The application relates to the technical field of aluminum alloy preparation, and discloses a high-toughness aluminum alloy preparation method, which comprises the following steps: putting a pure aluminum ingot into a smelting furnace, heating to 730-740 DEG C to completely melt, adding Mg and Si alloys, stirring to completely dissolve, introducing argon gas to remove gas and slag, and obtaining an aluminum-based melt; cooling the aluminum-based melt to 715-725 DEG C, sequentially adding Al-Sb intermediate alloy and Al-Ca intermediate alloy, first adding the Al-Sb intermediate alloy to stir, then adding the Al-Ca intermediate alloy to stir, and completing composite modification through heat preservation; cooling the modified melt to 708-718 DEG C, adding a composite strengthening agent, adopting ultrasonic treatment, and cooperating with electromagnetic stirring to disperse; after the uniformly dispersed melt is statically placed to remove slag, cooling to 695-705 DEG C to perform metal type gravity casting, adopting air cooling to assist cooling, obtaining an aluminum alloy ingot; and sequentially performing homogenization annealing, solid solution treatment, water quenching and artificial aging on the aluminum alloy ingot to obtain an aluminum alloy; and the application has the effect of improving the toughness of the aluminum alloy.