267 results about "Artificial aging" patented technology

The invention provides a 10.9-grade non-quenched and tempered cold heading steel wire rod and a production method thereof. The 10.9-grade non-quenched and tempered cold heading steel wire rod comprises the following chemical components: 0.23-0.27% of C, 0.30-0.50% of Si, 1.45-1.55% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 0.40-0.50% of Cr, 0.025-0.050% of Ti, 0.0025-0.0050% of B, less than or equal to 0.0050% of N and more than or equal to 0.015% of [Ti]-3.5 * [N]. According to the invention, on the basis of component design, a controlled rolling process deformation induced phase change, an online salt bath isothermal treatment cooling process and an artificial aging process are matched, so that rapid cooling and isothermal phase change of the wire rod are realized, and the prepared wire rod is uniform in through ring mechanical property, high in yield ratio, good in plasticity and long in fatigue life. The steel wire rod can be used for directly cold-drawing the steel wire without annealing, and the cold-drawn steel wire can meet the performance requirement of a 10.9-grade fastener without quenching and tempering after being formed. According to the production method of the wire rod, the production process can be simplified, the fastener production period is shortened, the cost is reduced, meanwhile, the energy consumption is reduced, and the method conforms to the current green and low-carbon development route.

The invention relates to the technical field of aluminum alloy conductor preparation, in particular to a preparation process of a light alloy conductor for a new energy automobile. The preparation process of the light alloy conductor for the new energy automobile comprises the following steps: firstly, preparing matrix aluminum alloy microspheres and graphene modified aluminum alloy microspheres; the matrix aluminum alloy microspheres and the graphene modified aluminum alloy microspheres are placed in a double-helix conical mixer according to the mass ratio of (11-16): 1 to be evenly mixed to obtain mixed alloy powder, and the mixed alloy powder is placed in a forming mold to be subjected to hot isostatic pressing treatment; and after cooling to room temperature, carrying out solution treatment, artificial aging treatment, first-stage wire drawing processing, first-stage intermediate annealing, second-stage wire drawing processing, second-stage intermediate annealing, third-stage wire drawing processing, third-stage intermediate annealing, fourth-stage wire drawing processing, fourth-stage intermediate annealing and final annealing treatment to obtain the finished light alloy conductor. The high-strength flexible cable has excellent electric conductivity and also has relatively good strength and deflection resistance.

The invention belongs to the field of conductive wrought aluminum alloys, and discloses a composite treatment method for synchronously improving conductivity and strength of a Fe-rich wrought aluminum alloy. The composite treatment method comprises the following steps: 1) melting the Fe-rich wrought aluminum alloy, and then carrying out microalloying treatment on B, Sr, Er and Bi; or according to the components and the content of the conductive aluminum alloy, the raw materials of pure aluminum, Fe intermediate alloy, Si intermediate alloy and B intermediate alloy of the conductive aluminum alloy are melted, then Mg intermediate alloy, Sr intermediate alloy, Er intermediate alloy and pure Bi are added, and even mixing and standing are conducted; 2) mechanical vibration casting; 3) diffusion annealing and rolling treatment; (4) solution treatment; (5) pre-aging treatment and variable-temperature rolling are conducted; and 6) artificial aging treatment. According to the method, the Fe impurity tolerance of the conductive aluminum alloy is improved, Fe-rich phase modification and refinement in the aluminum alloy are achieved, the conductivity of the alloy is remarkably improved, meanwhile, the alloy strength is improved, and regeneration and recovery of the conductive aluminum alloy are facilitated.

The invention discloses a novel high-strength plastic magnesium alloy and a preparation and processing method thereof. The magnesium alloy is prepared from, by mass, 3%-10% of Gd, 1%-5% of Y, 0.3%-5.0% of Sn, 0.3%-1.5% of Sb, 0.3%-1.0% of Ge, 0.3%-1.0% of Ca, 0.3%-1.2% of Sr, 0.3%-1.0% of Zr and the balance pure magnesium. The preparation and processing method of the alloy comprises the following steps: (1) preparing raw materials according to target alloy components, and smelting to obtain a magnesium alloy melt; (2) pouring the magnesium alloy melt to form a cast ingot; (3) heating the cast ingot for deformation cogging; (4) carrying out homogenizing heat treatment on the blank; (5) carrying out hot working on the homogenized alloy, and then carrying out artificial aging under the combined action of pulse current and direct current; and (6) the aged material is placed in liquid nitrogen to be kept, and then the deformation residual stress of the material is reduced in a cold water pouring and freezing mode. The defect of the magnesium alloy in the aspect of plastic deformation capacity can be effectively overcome, the controllability of the magnesium alloy structure can be achieved, and the application range of the magnesium alloy is further expanded.

The invention provides an aluminum alloy composite liquid cooling plate and a preparation method and application thereof, and belongs to the technical field of aluminum alloy materials. A proper amount of Si and Mg are added into the core layer, so that a proper amount of Mg2Si with an aging strengthening effect can be generated, the aging strengthening effect is enhanced, the strength of the plate is improved, and the purpose of reducing the thickness of the material is achieved; meanwhile, excessive Si and Mg2Si can be prevented from reducing the corrosion resistance of the material; the content of Cr is controlled within 0.1%, precipitation of an Mg2Si phase at a grain boundary can be inhibited, the natural aging process is delayed, and the strength after artificial aging is improved; a small amount of Si is added into the first barrier layer and the second barrier layer, so that the strength of the material can be improved, and the corrosion resistance of the material is prevented from being reduced by excessive Si; by adding a proper amount of Mn, the strength of the material can be improved, and meanwhile, the corrosion resistance of the material is prevented from being reduced.

The invention relates to a machining method for a high-strength large thin-wall weak-rigidity aluminum alloy ring piece, and belongs to the technical field of machining. The aluminum alloy ring piece blank is subjected to solution treatment; the blank is subjected to bulging treatment; the bulged blank is subjected to artificial aging treatment; carrying out thermal vibration aging treatment on the aluminum alloy ring piece blank; rough machining is conducted on the aluminum alloy ring piece blank, and a workpiece of the aluminum alloy ring piece is obtained; performing primary destressing annealing heat treatment on the workpiece; carrying out primary semi-finishing on the workpiece; carrying out secondary destressing annealing heat treatment on the workpiece; carrying out secondary semi-finishing on the workpiece; carrying out first high-low temperature heat treatment on the workpiece; the workpiece is subjected to third-time semi-finish machining; performing secondary high-low temperature heat treatment on the workpiece; the workpiece is subjected to finish machining treatment, and an aluminum alloy ring piece product is formed; according to the method, the machining allowance is distributed, and various stress eliminating means are adopted, so that the performance and the size precision of the ring piece are guaranteed.

The invention discloses a high-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy profile for an ultra-large aircraft wing rib and a preparation method of the high-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy profile, the Al-Zn-Mg-Cu aluminum alloy profile comprises the following alloy components in percentage by mass: 5.5-5.8% of Zn, 1.6-1.9% of Mg, 1.9-2.5% of Cu, 0.2-0.3% of Mn, 0.1-0.2% of Zr, 0.1-0.2% of Cr, 0.1-0.2% of Ti, less than or equal to 0.12% of Fe, less than or equal to 0.1% of Si and the balance of Al and inevitable impurities, and the content of a single impurity is not more than 0.05%. The total content of impurities does not exceed 0.15%; the preparation process comprises the steps of smelting casting, two-stage homogenizing annealing, extrusion, solution treatment, stretch straightening and two-stage artificial aging, a mold adopted during extrusion is a double-mold-hole mold, and mold holes of the mold are distributed left and right and are in central symmetry. According to the Al-Zn-Mg-Cu aluminum alloy and the preparation method thereof, by optimizing the alloy components, adjusting the layout of the die holes of the die and the solid solution and aging process, the grain structure of the profile is fine and uniform in distribution, and the Al-Zn-Mg-Cu aluminum alloy guarantees excellent strength while the fracture toughness is improved.

The invention relates to a preparation method of a high-strength weldable 6xxx series aluminum alloy and an extruded material thereof, which comprises the following steps of: (1) preparing a 6xxx series aluminum alloy round cast ingot by adopting a direct water cooling semi-continuous casting (DC casting for short) mode, and the alloy components of the 6xxx series aluminum alloy round cast ingot comprise 0.90-1.45% of Mg, 1.00-1.55% of Si, 0.40-0.80% of Cu, 0.30-0.80% of Zn, 0.08-0.15% of Zr, less than or equal to 0.50% of Mn, less than or equal to 0.35% of Cr, less than or equal to 0.60% of Fe, less than or equal to 0.30% of Ti and the balance of Al; (2) homogenization treatment is conducted, specifically, the 6xxx series aluminum alloy cast ingot is subjected to homogenization treatment at 540-555 DEG C for 4-8 h, and then air cooling is conducted; (3) heating is conducted, specifically, the 6xxx series aluminum alloy cast ingot obtained after homogenization treatment is heated to 440-460 DEG C; (4) extrusion is conducted, specifically, the 6xxx series aluminum alloy cast ingot obtained after heat preservation is subjected to hot extrusion, the extrusion ratio is 10-15, the extrusion speed is 1.0-1.5 mm / s, the temperature of an extrusion container is 400-430 DEG C, the extrusion temperature is 440-460 DEG C, and water cooling or air cooling is conducted at an outlet; (5) solution treatment is conducted, specifically, the 6xxx series aluminum alloy extruded profile / bar is heated to 540-555 DEG C, heat preservation is conducted for 15-90 min, and then water quenching is conducted; (6) aging treatment: loading the extruded profile / bar subjected to solution treatment into an aging furnace, heating to 165-175 DEG C, keeping the temperature for 8-14 hours, discharging from the furnace, and cooling in air; according to the method, the content of alloy elements in the 6xxx series aluminum alloy is optimized and regulated through component design, so that main alloy elements and trace alloy elements have the optimal proportion. After an alloy cast ingot is subjected to homogenization, extrusion, off-line solid solution water quenching and artificial aging treatment, the strength of the alloy cast ingot exceeds 420 MPa, the fusion welding coefficient reaches 0.7-0.8, the fatigue strength exceeds 160 MPa, and meanwhile the alloy cast ingot has good plasticity and corrosion resistance.

The invention provides a preparation method of a medium-thin plate AZ31B magnesium alloy high-toughness welding joint, and relates to the technical field of welding. The welding groove is in a Y shape, the groove angle of a welding joint is 60 degrees, the truncated edge size is 1.5 mm, the root gap is 0.5-1 mm, oil stain and oxidation film cleaning is carried out before welding, then assembling is carried out, single-face single-pass welding or single-face double-layer double-pass welding is carried out on an AZ31B test plate, and artificial aging treatment is carried out after welding. The preparation method of the medium-thin plate AZ31B magnesium alloy high-toughness welding joint overcomes the defects in the prior art, does not need a liner or back argon protection, is simple to operate, low in manufacturing cost and high in production efficiency, and can be suitable for welding production and manufacturing of various product structural forms.

The invention discloses a composite treatment method for forming property of a high-strength aluminum alloy sheet. The composite treatment method comprises the steps of blanking, pressure quenching, bending and aging. An aluminum alloy blank is blanked according to the unfolding size of a part and then heated and subjected to heat preservation, then the aluminum alloy blank is rapidly transferred into a pressure quenching die to complete solid solution-quenching treatment, then bending forming is completed within 3 hours, and then heating and heat preservation are conducted to complete artificial aging. During quenching, the die is adopted for applying pressure, the aluminum alloy can be always kept in a flat plate state at the moment, the temperature is high, the rigidity is weak, but the aluminum alloy is restrained by the die, the aluminum alloy is not prone to deformation in the quenching process, the residual stress after quenching is low, abnormal deformation in the subsequent bending forming process is smaller, and the size precision is high; after the plate is quenched, residual stress is low, self-deformation is small, residual stress of room-temperature shape correction does not exist, abnormal deformation does not exist after bending forming, and therefore shape correction is not needed, and efficiency is higher. Compared with a traditional process method, the method is easy and convenient to operate, high in forming quality and efficiency and worthy of application and popularization.

The invention discloses a medium-high strength 7020 aluminum alloy section with a complex section and a preparation method thereof. The section comprises the following alloy components in percentage by mass: less than or equal to 0.18% of Si, less than or equal to 0.25% of Fe, 0.10-0.20% of Cu, 0.3-0.5% of Mn, 1.2-1.4% of Mg, 0.25-0.35% of Cr, 4.6-5.0% of Zn, 0.04-0.06% of Ti, 0.10-0.15% of Zr, 0.15-0.20% of Zr + Ti and the balance of Al and inevitable impurities. The preparation method comprises the working procedures of casting, homogenization treatment, extrusion, online quenching, stretching, saw cutting, artificial aging and the like. Alloy components and a preparation process are combined, the 7020 aluminum alloy profile which is high in strength, good in toughness and small in mechanical property difference at different thickness positions of the cross section is obtained, and the preparation method is suitable for preparing the aluminum alloy profile with the complex cross section.

The invention belongs to the field of wrought aluminum alloy regeneration and recovery, and discloses a method for regulating and controlling the structure and performance of a high-Fe-content 6016 regenerated aluminum alloy. The method comprises the following steps: 1) melting a 6016 aluminum alloy with high Fe content, adding a Cr-containing intermediate alloy, uniformly mixing, standing, and adding Sn to obtain a microalloyed melt; (2) the melt passes through a snake-shaped pouring gate and then enters a mold, and casting is conducted to form a cast ingot; and (3) the cast ingot is subjected to homogenizing annealing treatment, air cooling is conducted after hot rolling, then cold rolling, high-temperature solid solution treatment, cooling, natural aging and artificial aging treatment are conducted, and the regenerated aluminum alloy is obtained. According to the method, primary alpha-Al grains in the 6016 regenerated alloy are efficiently refined, the roundness is improved, and the Fe-rich phase form is effectively modified into a small Chinese character shape from a thick long needle shape. The prepared regenerated aluminum alloy is excellent in mechanical property, the harm of the impurity element Fe to the 6016 regenerated aluminum alloy is remarkably reduced, and high-quality utilization of the regenerated aluminum alloy is achieved.

The invention discloses a thermomechanical treatment preparation method of a high-toughness Al-Mg-Si alloy plate and application of the high-toughness Al-Mg-Si alloy plate in a new energy automobile covering part. The alloy comprises, by mass, 1.0%-1.5% of Si, 0.8%-1.2% of Mg, 0.4%-0.8% of Cu, 0.55%-0.95% of Mn, 0.08%-0.20% of Cr, 0.05%-0.30% of Zn and the balance Al and impurities, the ratio of Mg to Si is 1.2%-2.0%, and the ratio of Mn to Cr is 3.0%-4.5%. The preparation method comprises the following steps: smelting, cutting the head and the tail, milling the surface, carrying out graded homogenization (290-310 DEG C * 6-10 h + 550-570 DEG C * 10-14 h), carrying out hot rolling to 5-6 mm, carrying out solid solution quenching (540-570 DEG C * 0.5-1.5 h), carrying out pre-aging (70-90 DEG C * 10-14 h), carrying out cold rolling to 1-2 mm, and carrying out artificial aging (170-190 DEG C * 0.5-2 h). The method is used for new energy automobile covering parts, battery pack cover plates or automobile door anti-collision beams, and the endurance mileage is remarkably increased.

The invention belongs to the technical field of alloy preparation, and particularly discloses a double-peak heterostructure 6061 aluminum alloy and a preparation method thereof.The preparation method comprises the following steps that S1, solution treatment is conducted, specifically, the as-cast 6061 aluminum alloy is subjected to solution treatment for 4 h at the temperature of 560 DEG C, water quenching is conducted to the room temperature, and the as-cast 6061 aluminum alloy is cut into thin plates; s2, deep cooling rolling treatment is conducted, specifically, the thin plate obtained in the S2 is sequentially cooled and rolled; s3, short-time annealing treatment is conducted, specifically, annealing is conducted for 5 min at 200 DEG C, and oil cooling is conducted to the room temperature; and S4, aging treatment is conducted, specifically, artificial aging is conducted for 1-32 h at the temperature of 120-180 DEG C, and the 6061 aluminum alloy is obtained. According to the 6061 aluminum alloy with the double-peak heterostructure and the preparation method of the 6061 aluminum alloy with the double-peak heterostructure, the double-peak heterostructure of fine recrystallized grains and coarse deformed grains is obtained, then the size and the volume fraction of second-phase particles are regulated and controlled, the strengthening mechanism of the 6061 aluminum alloy with the double-peak heterostructure is disclosed, and synchronous improvement of the strength and plasticity of the 6061 aluminum alloy is achieved.

The invention discloses a heat treatment method for preventing overaging of Al-Cu alloy. The method comprises the following steps: firstly adding trace rare earth elements into the Al-Cu alloy, then carrying out ultrasonic low-temperature aging treatment, then carrying out plastic deformation, and finally carrying out secondary aging treatment. Alloy elements are gathered in a small range through rare earth elements, long-distance diffusion of the alloy elements is avoided, nucleation of atomic clusters (GP regions) is improved through ultrasonic waves and plastic deformation, a large number of plastic deformation dislocations are formed in an Al matrix, growth and coarsening of the sizes of the atomic clusters are restrained, theta ''is kept, phase change does not occur, and the alloy elements are prevented from being dispersed in the Al matrix. The problem that when the Al-Cu alloy is subjected to artificial aging, the maintenance time of the peak aging state is short, and the Al-Cu alloy easily enters the overaging state, so that the mechanical property of the alloy is reduced is solved.

The invention relates to a high-strength and high-toughness aluminum alloy material as well as a preparation method and application thereof. The alloy is particularly suitable for production of new energy automobile parts such as an auxiliary frame and a battery tray. In order to solve the problems that an existing AlSi7Mg alloy is serious in deformation, low in yield strength qualification rate and the like during high-temperature heat treatment, a proper amount of Cu and Mg are introduced on the basis of the AlSi7 alloy, alloy components are optimized, and the content of harmful elements is strictly controlled. By reducing the solid solution temperature to about 490 DEG C and combining proper solid solution time and an artificial aging process, the alloy disclosed by the invention can obviously reduce the heat treatment deformation of a casting while ensuring the tensile strength and the yield strength. Test results show that after the alloy is adopted, the yield ratio of a casting is higher than 0.73, and the ductility and the tensile strength both meet the design requirements of automobile parts. In addition, according to the alloy, the energy consumption is reduced, the shaping workload after heat treatment is reduced, the production efficiency and economic benefits are remarkably improved, and the alloy has wide industrial application prospects.

A method of obtaining tailored properties in a metal product includes modifying the artificial aging response in the metal product. In certain embodiments, the method includes selectively applying a thermal spike to one or more localized areas of the metal product prior to artificial aging treatment of the entire metal product.

The present invention relates to an aluminum alloy welding material and a method for preparing a high-strength and tough weld, belonging to the field of welding technology. The aluminum alloy welding material of the present invention combines welding technologies such as cold metal transfer and pulse composite welding, laser welding, etc. with rapid cooling, so that elements such as Mg, Cu, and Zn in the weld are completely solid-solved and in a supersaturated state. The joint strength mainly comes from the solid-solution strengthening contribution of alloy elements such as Mg, Cu, and Zn and the precipitation strengthening contribution of the corresponding strengthening phases; then, through short-term natural aging, the solute-vacancy coupling diffusion mechanism can be realized, promoting the rapid precipitation of high-density strengthening phases in the weld, thereby realizing the strengthening and toughening of the weld, and significantly improving the weld strength and welding coefficient. Thus, the intervention of artificial aging is avoided, the welding cost is reduced, and the welding efficiency is improved.

The invention belongs to the technical field of aluminum lithium alloy heat treatment, and provides a heat treatment method for improving the obdurability of an aluminum lithium alloy plate. The heat treatment method comprises the following steps: sequentially carrying out solid solution heat treatment, rolling pre-deformation treatment, pre-stretching treatment and artificial aging treatment on the aluminum-lithium alloy plate. According to the method, through optimized solid solution heat treatment, a second phase separated out of the aluminum lithium alloy plate in the cold deformation state is subjected to solid solution in a matrix, and a supersaturated solid solution of the aluminum lithium alloy plate is obtained; a large amount of dislocation is introduced in rolling pre-deformation, work hardening is introduced, the dislocation density is increased, and the aging precipitation power of the aluminum-lithium alloy plate is improved; residual stress in the rolling pre-deformation process is eliminated through pre-stretching treatment, and the aluminum-lithium alloy plate which is subjected to stress removal and is flat in appearance is obtained; a large number of strengthening phases such as T1 phases and theta'phases are separated out through artificial aging treatment, and strengthening and toughening of the aluminum-lithium alloy plate are achieved; the yield strength reaches 520 MPa or above, the tensile strength reaches 590 MPa or above, and the ductility reaches 8% or above.

The invention discloses a manufacturing process of a corrosion-resistant aluminum alloy flange plate. The manufacturing process comprises the following steps that S1, alloy smelting and component control are conducted; s2, homogenizing heat treatment; s3, hot die forging forming; s4, solution treatment; s5, multi-stage artificial aging; and S6, surface treatment. According to the flange plate and the manufacturing method thereof, through the unique alloy component design and the combination of the whole-process optimization technology of precise smelting, homogenization, die forging, solid solution, multi-stage aging and micro-arc oxidation, cooperative regulation and control of intracrystalline strengthening and grain boundary purification are achieved on the microstructure, and finally the flange plate product with excellent comprehensive performance is obtained.

Disclosed is a method for manufacturing an Al—Zn—Mg—Cu series aluminum alloy plate. The method comprises: (1) preparing an Al—Zn—Mg—Cu series aluminum alloy ingot; (2) sequentially performing homogenization, hot rolling, cold rolling, solid solution quenching and artificial aging on the Al—Zn—Mg—Cu series aluminum alloy ingot to obtain a T6-state aluminum alloy plate; (3) performing heating, warm forming, in-mold quenching, pre-aging and paint baking treatment on the T6-state aluminum alloy plate to obtain a finished aluminum alloy plate. Further disclosed is an Al—Zn—Mg—Cu series aluminum alloy plate, made using the above manufacturing method. The present invention standardizes the production process and process parameters of the Al—Zn—Mg—Cu series aluminum alloy plate, and the Al—Zn—Mg—Cu series aluminum alloy plate prepared by said manufacturing method has high tensile strength, yield strength and elongation, can be applied to automobiles, and has good popularization prospects and application value.

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.

The invention discloses a processing technology of a lightweight high-hardness high-strength aluminum profile, and relates to the technical field of aluminum alloy processing. According to the method, the 7050 aluminum alloy profile is smelted, the extra Si element is added in the smelting process, the content of the Si element in the 7050 aluminum alloy sheet is increased, the metastable Al-Si phase in the alloy is increased, meanwhile, nano TiC is added, the prepared aluminum alloy profile is effectively refined, then multi-stage artificial aging treatment is adopted, more energy is provided for nucleation of a precipitated phase in the aluminum alloy, and the aluminum alloy can be effectively refined. And finally, the recast 7050 aluminum alloy profile is subjected to anodic oxidation surface treatment, a hard compact oxidation film is formed on the surface of the aluminum alloy profile, the porosity of the surface of the aluminum profile is reduced, the hardness of the aluminum profile is enhanced, and the service life of the aluminum profile is prolonged. The aluminum profile prepared through the method is high in strength and hardness, and cracks are effectively reduced in the automobile lightweight application process.

The invention discloses a high-strength and high-toughness Al-Cu-Sc aluminum alloy and a preparation method, and belongs to the technical field of aluminum alloy materials, and the Al-Cu-Sc aluminum alloy is composed of the following components by mass percent: 5.0% of Cu, 5.0% of Sc, 5.0% of Al, 5.0% of Sc and the balance of Al. 0.3% of Sc; and the balance is aluminum and inevitable impurity elements with extremely low content. By increasing the Cu content, adding trace Sc elements and matching high-deformation rolling with proper artificial aging, a high-density nanoscale precipitated phase is formed in the material, and the mechanical property of the aluminum alloy is improved.

The invention discloses a process for regulating and controlling precipitated phase distribution of regenerated 6XXX series aluminum alloy based on an electromagnetic-ultrasonic composite field, and relates to the technical field of metal material processing. The method comprises the following steps: introducing a carboxyl modified polyaryletherketone-siloxane copolymer assistant in a solid-phase temperature zone, applying ultrasonic waves to synchronously act with a pulsed magnetic field, and then carrying out artificial aging. According to the method, the aging peak time is remarkably shortened, the precipitated phase is refined and homogenized, the mechanical property is obviously improved, and an innovative and efficient path is provided for improving the structure stability and performance consistency of the regenerated aluminum alloy.

The application relates to the technical field of material processing, and particularly discloses an aluminum alloy processing method through cumulative pack rolling, contact heating and artificial aging. The processing technology of the application comprises the following steps: (1) homogenizing treatment is performed on aluminum alloy material; (2) the surface of the aluminum alloy material is cleaned; (3) pre-deformation is applied to the aluminum alloy material by using a cumulative pack rolling method, and water quenching treatment is performed after the pack rolling is completed; (4) the upper and lower molds of a contact heating device are preheated to the solid solution temperature of the aluminum alloy material, and the aluminum alloy material is placed between the upper and lower molds to perform contact heating so as to realize solid solution treatment; (5) stamping forming quenching treatment; (6) the aluminum alloy material after the stamping quenching is transferred to a heating furnace to perform artificial aging treatment. The aluminum alloy processing method through cumulative pack rolling-contact heating-artificial aging can greatly shorten the solid solution time and aging time of the aluminum alloy, improve the strength and hardness of the aluminum alloy, and does not cause loss of the elongation rate of the aluminum alloy.

The application relates to a rapid air-cooling aluminum alloy cylinder cover heat treatment method and an aluminum alloy cylinder cover, which comprises sequentially performing solid solution treatment, rapid air-cooling quenching treatment and artificial aging treatment on an aluminum alloy cylinder cover casting to obtain the aluminum alloy cylinder cover; the rapid air-cooling quenching treatment comprises: cooling the aluminum alloy cylinder cover casting through air cooling, and the cooling speed between 430 DEG C and 260 DEG C is 7+ / -2 DEG C / min. The application utilizes air-cooling quenching, designs corresponding cooling speed, has little influence on strength and elongation, and better cutting performance. T6 uses water cooling, has no speed requirement, and the actually obtained strength and elongation are much higher, leading to poor cutting performance, great influence on mass production cost and efficiency. After the technology is adopted, the heat treatment process parameters are solidified, the performance detection result of the cylinder cover verified through multiple rounds of debugging is good, the stable and reliable method effectively avoids broken chip defects, abnormal tool wear or breakage, the tool has good broken chip effect, and waste loss and machining cost are reduced.

The invention discloses a thermomechanical treatment method of a 2XXX series aluminum alloy. The method comprises the following steps: placing an alloy in a heating furnace for solution treatment; the alloy is immediately subjected to water quenching to 20-25 DEG C after being discharged from the furnace, and the quenching time is less than 15 seconds; after quenching, naturally aging the alloy at room temperature for 12 hours; the alloy subjected to natural aging is placed in a heating furnace to be heated to 175 + / -10 DEG C, taken out of the heating furnace and extruded in a Bc mode for four passes; and naturally cooling the extruded alloy in air. According to the 2XXX series aluminum alloy obtained through the method, the tensile strength can reach 490 MPa, the yield strength can reach 410 MPa, the hardness can reach 171 HV, and the mechanical property is obviously improved compared with the mechanical property obtained after artificial aging. The high-temperature ECAP technology is adopted, the situation that the aluminum-copper alloy is prone to breakage during normal-temperature extrusion is avoided, the method is suitable for machining treatment of small workpieces, and the mechanical property of the alloy is effectively improved.

A thermally stable component formed of a tempered aluminum alloy casting which reduced costs is provided. The aluminum alloy typically has an elongation of at least 8% after casting, which is preferred for self-piercing rivet processes. The aluminum alloy leaves a casting facility in the as-cast (F temper) condition. The cast aluminum alloy is then shipped to another entity, such as an OEM, and is subjected to an artificial aging process, such as on the OEM's existing paint line, rather than at the casting facility. The artificial aging process typically includes electrodeposition coating and curing. The components that can be formed by the reduced cost method include lightweight automotive vehicle components, including structural, body-in-white, suspension, or chassis components, such as front shock towers, front body hinge pillars, tunnels, and rear rails.

The invention discloses a processing method of a cambered surface valve seat of an ore pulp plug valve, which comprises the following steps: in the processing of the cambered surface valve seat, carrying out linear cutting on a forge piece barrel material to obtain a semi-finished product of the cambered surface valve seat, and then carrying out artificial aging treatment. According to the method, stress generated in lathe machining, milling machine machining and linear cutting machining of the forge piece barrel material is eliminated through artificial aging treatment, so that the cambered surface valve seat has good stability, the precision of dimensional tolerance and form and location tolerance is remarkably improved, deformation in subsequent machining is blocked, and the stability of a product is solidified; in the outer circle grinding step and the inner hole grinding step, matched tools are adopted for assisting in grinding, so that the cambered surface valve seat and the tools are assembled into an integral structure with good rigidity in the machining process, the cutter relieving phenomenon of a grinding wheel in the grinding process is avoided, the grinding work is more stable, and the machining efficiency is improved. In the grinding process of the cambered surface valve seat, appearance defects and surface roughness value segmentation defects are avoided, and the dimensional precision of a finished cambered surface valve seat product is effectively improved.