381 results about "Aluminium matrix" patented technology

The invention discloses a gradually-changed Si-Al alloy coating diamond / aluminum-based composite material and a preparation method and application thereof, and the gradually-changed Si-Al alloy coating diamond / aluminum-based composite material is composed of an aluminum matrix and modified diamond evenly dispersed in the aluminum matrix. The modified diamond comprises diamond particles and a gradually-changed Si-Al alloy coating wrapping the surfaces of the diamond particles, in the gradually-changed Si-Al alloy coating, the mass fraction of Si is linearly decreased from 100% to 0% from inside to outside, and the mass fraction of Al is linearly increased from 0% to 100% from 0%. According to the method, the Si-Al alloy coating with gradually-changed and controllable components is constructed on the surface of the diamond, so that a SiC transition layer with strong binding force can be formed with the diamond, the gradient gradient coating is formed from inside to outside, internal stress can be released, good metallurgical bonding with an aluminum matrix can be achieved, formation of an Al4C3 phase is inhibited, and therefore the performance of the composite material is remarkably improved.

The invention relates to the field of aluminum materials, and provides an automobile corrosion-resistant aluminum material and a preparation method thereof.The automobile corrosion-resistant aluminum material is prepared from cerium oxide loaded aluminum oxide nanorods, scandium / boron nitride nanotubes, zirconium powder, magnesium powder, copper powder, manganese powder, silicon carbide nanoparticles, TiB2 nanoparticles, aluminum powder and stearic acid. Wherein the cerium oxide loaded aluminum oxide nanorod is composed of an aluminum oxide nanorod and cerium oxide nanoparticles loaded on the surface of the aluminum oxide nanorod, and the scandium / boron nitride nanotube is composed of a boron nitride nanotube and a scandium nanolayer uniformly coated on the surface of the boron nitride nanotube. The material is prepared through mechanical ball milling, cold isostatic pressing forming, vacuum sintering and aging treatment, and finally the aluminum-based composite material containing the Al3Sc nano precipitated phase and the boron nitride nanotube reinforced phase is formed. And an Al3Sc precipitated phase and an aluminum matrix form a coherent interface, so that the strength, the corrosion resistance and the wear resistance of the material are improved. Through nanostructure optimization, high performance of the aluminum alloy is achieved, and the aluminum alloy is suitable for the fields of automobiles, aerospace and the like.

The invention belongs to the technical field of aluminum alloy heat treatment, and particularly relates to a high-strength Al-Mg alloy and a preparation method thereof. According to the Al-Mg alloy, nucleation particles are provided for an AlMn second phase in an aluminum matrix through Mn and Zn alloying, and the activation energy of the AlMn second phase is reduced. According to the preparation method, the prepared alloy is mainly subjected to multi-stage homogenization treatment, and in multi-stage homogenization, the low temperature is used for second-phase pre-nucleation, the middle temperature is used for second-phase nucleation and precipitation, and the high temperature is used for coarse crystal phase redissolution. The alloy ingot is subjected to multi-stage homogenization heat treatment by adopting the method, the second phase precipitation number density of the alloy ingot can be remarkably improved, and the distribution uniformity of the alloy ingot can be improved, so that the strength of the alloy is improved, a large number of subcrystal structures are reserved in the alloy in the subsequent hot working process, and recrystallization and abnormal growth are effectively inhibited; and an optimal deformation structure is provided for obtaining a high-performance aluminum alloy product.

The invention discloses a cross-scale graphene / aluminum composite material machine learning design method, and belongs to the technical field of metal material property prediction. In order to inhibit serious interface reaction of graphene and a metal matrix at an interface, a method for accelerating a first principle by machine learning is utilized, alloy elements suitable for segregation towards a graphene / aluminum interface are selected in a periodic table range of elements, and elements suitable for being doped in the aluminum matrix and having no negative influence on mechanical properties of the matrix are selected; the influence of graphene distribution and temperature on the mechanical property of the cross-scale graphene / aluminum composite material is determined through a molecular dynamics simulation method, and the preparation process range of the cross-scale graphene / aluminum composite material is determined; alloy elements suitable for segregation to a graphene / aluminum interface and elements suitable for being doped in an aluminum matrix and having no negative influence on mechanical properties of the matrix are compared to obtain an intersection, doped elements are determined, and then experimental verification is performed based on a preparation process of the cross-scale graphene / aluminum composite material.

The invention provides a preparation method and application of a foamy copper reinforced aluminum-based composite material, and belongs to the technical field of aluminum-based composite material preparation. According to the foamy copper reinforced aluminum-based composite material, a variable-frequency and variable-power ultrasonic vibration assisted centrifugal casting technology is adopted, strong centrifugal force and the ultrasonic cavitation effect are utilized, so that the biological flowability of aluminum water is improved, the wettability between aluminum and copper is improved, and in combination with the effects of an auxiliary agent and Zn-Al or Sn-Al intermediate alloy, the foamy copper reinforced aluminum-based composite material is obtained. The problem that the binding force of foamy copper and an aluminum matrix is poor is solved, the adopted ultrasonic power is low (smaller than or equal to 1000 W), the preparation technology is simple, the obtained foamy copper reinforced aluminum matrix composite is free of obvious cracks and holes and high in density and thermal diffusion coefficient, and a light intelligent thermal management material can be provided for the field of electronic equipment.

The invention provides a preparation method of a bipolar current collector based on a selective double-sided modified masking film. The preparation method comprises the following steps: depositing a Ni-Cr alloy layer on a single side surface of an aluminum substrate; one side of the masking film is etched to form a roughened surface, and the other side of the masking film is hydrophobic to form a hydrophobic surface; the roughened surface of the masking film and the surface, without the Ni-Cr alloy layer, of the aluminum matrix are pressed, and the edge is coated with curing glue; and placing the pressed and glued sample in an electroplating solution to electroplate a copper layer, finally cutting off an edge glue sealing area, and stripping the masking film. According to the preparation method, the masking film used for protecting the back surface of the aluminum substrate is subjected to double-sided differential treatment, the edge sealing technology is matched, and the Ni-Cr alloy is adopted for bottoming, so that the adhesive force between the copper plating layer and the aluminum substrate is improved, the risk of causing corrosion of a primary battery is reduced, the bipolar current collector which is firmly combined and has a pure interface can be prepared, and the service life of the bipolar current collector is prolonged. And a feasible solution is provided for realizing light-weight and high-performance current collectors for electronic devices such as lithium batteries and the like.

The invention belongs to the technical field of preparation of aluminum-based composite materials, and particularly relates to a preparation method of a reinforced aluminum-based composite material through vacuum reciprocating smelting assisted thin-strip cast rolling. Comprising the steps of aluminum matrix material preparation, ceramic / aluminum matrix composite powder vacuum ball milling, aluminum matrix and ceramic / aluminum matrix composite powder vacuum reciprocating smelting, thin strip cast rolling, cast strip primary treatment, cast strip heat treatment, hot rolling, cold rolling, performance optimization and the like. An aluminum alloy matrix bar with specific components is selected, ceramic particle / aluminum matrix composite powder with the mass fraction of 5%-25% is prepared through vacuum ball milling, it is ensured that aluminum powder is completely attached to the surfaces of ceramic particles, and good wetting of the particles and an aluminum matrix is achieved. And then thin strip cast rolling, heat treatment, hot rolling, cold rolling and other treatments are carried out. And finally, the ceramic / aluminum-based composite material with the ceramic particles uniformly distributed on the matrix is prepared, and the ceramic / aluminum-based composite material shows excellent tensile strength, elongation and wear resistance and has no grain boundary segregation phenomenon.

The invention discloses a long-life aluminum profile for a mold and a preparation process thereof, and relates to the technical field of aluminum alloys, a zirconium film is loaded on the surface of the aluminum profile, the zirconium film generates an oxide layer on the surface of an aluminum substrate through hydrolysis reaction, micropores in the surface of the aluminum substrate are filled, and the corrosion resistance of the aluminum profile is enhanced. However, the corrosion resistance of a single zirconium film is insufficient, and the corrosion resistance of the aluminum profile is further enhanced by coating the surface of the aluminum profile with the zirconium film with the anti-corrosion liquid. 3-epoxypropoxy propyl triethoxy silane is added into the zirconium conversion liquid, so that the surface of a zirconium film is provided with epoxy groups, the epoxy groups on the surface of the zirconium film and amino groups in the corrosion-resistant chitosan microcapsules form hydrogen bonds and coordinate bonds, the bonding strength of a corrosion-resistant coating is improved, and therefore the corrosion resistance of the aluminum profile for the mold is improved.

The invention provides a welding method of an aluminum-based composite material and an aluminum-based composite material joint, and relates to the technical field of welding, the welding method comprises the following steps: plating a metal layer on a to-be-welded surface of the aluminum-based composite material to obtain a to-be-welded part; wherein the aluminum-based composite material comprises an aluminum matrix and a ceramic reinforced phase, the metal layer is used for forming an eutectic phase with the aluminum matrix, and the melting point of the eutectic phase is 440 DEG C or below; the two to-be-welded parts are assembled, so that the metal layers of the two to-be-welded parts are attached, and an assembly part is obtained; under the vacuum condition, preset pressure is applied to the assembly part, the assembly part is heated to the welding temperature under the action of pulse current, heat preservation is conducted for preset time, the assembly part is cooled to the room temperature, and the aluminum-based composite material connector is obtained; wherein the direction of the pulse current is perpendicular to the to-be-welded surface of the aluminum-based composite material. By adopting the method disclosed by the invention, the aluminum-based composite material joint with relatively high strength and relatively low deformation rate can be obtained.

The utility model discloses a connecting structure of an aluminum-based bus duct with copper-clad end parts, and relates to the technical field of busbars. The copper-aluminum eutectic conducting bar comprises a copper-aluminum eutectic conducting bar body, the copper-aluminum eutectic conducting bar body comprises an aluminum alloy base body layer A, the end portions of the upper side face and the lower side face of the aluminum alloy base body layer A are covered with copper connecting layers A, and the copper-aluminum eutectic layer A is arranged between the aluminum alloy base body layer A and the copper connecting layers A. The copper-aluminum eutectic conducting bar further comprises a connector which comprises a plurality of copper-aluminum eutectic connecting pieces. The copper-aluminum eutectic conducting bar is clamped by the connector and tightly abuts against the copper-aluminum eutectic connecting piece. The beneficial effects of the utility model lie in that the utility model combines the advantages of low density and low cost of aluminum and the characteristics of high conductivity and corrosion resistance of copper, and only the end part of the aluminum substrate is coated with copper, so that the overall cost is reduced, the excellent performance of key parts is ensured, the perfect balance between the performance and the cost is realized, and the copper-aluminum eutectic technology is adopted. The problems that interface bonding is not firm, resistance is large, and corrosion is prone to occurring when aluminum and copper are directly connected are effectively solved.

The invention provides a diamond and negative expansion particle reinforced aluminum matrix composite and a preparation method, and belongs to the technical field of composites. The aluminum-based composite material is composed of a diamond phase and a negative thermal expansion phase which are dispersed in an aluminum matrix. The average particle size of the diamond phase is 10-1000 [mu] m, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20; the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than that of the negative thermal expansion particles away from the diamond phase. The diamond and negative expansion particle reinforced aluminum-based composite material with excellent thermophysical performance is obtained by regulating and controlling the volume fraction of the diamond and the negative expansion particles, the thermal expansion coefficient matched with a semiconductor material is prepared through a collaborative optimization strategy, and the diamond and negative expansion particle reinforced aluminum-based composite material is applied to the field of electronic packaging heat dissipation materials.

The invention discloses a dispersion distribution method for a micro-nano multi-scale mixed SiC particle reinforced phase in an aluminum-based composite material and the composite material, and relates to the technical field of metal-based composite material preparation. The method comprises the following steps: firstly, carrying out ultrasonic cleaning, ultrasonication and two-stage high-temperature oxidation treatment on SiC particles, and generating an oxidation film on the surfaces of the particles; ball-milling and mixing the treated micron and nano SiC particles and micron pure magnesium particles according to a specific proportion, and pressing into a precast block; then preparing an aluminum alloy melt, cooling to a solid-liquid two-phase region, carrying out semi-solid stirring, and adding the preheated precast block; and finally, raising the temperature to be above a liquidus, rewarming, stirring and molding by casting. Through the synergistic effect of ultrasonic physical dispersion, high-temperature oxidation surface modification and magnesium-induced semi-solid stirring, the problems that micro-nano particles are prone to agglomeration, wettability is poor and interface reaction is difficult to control are effectively solved, multi-scale uniform dispersion distribution of a reinforced phase in an aluminum matrix is achieved, and the comprehensive performance of the composite material is remarkably improved.

The invention belongs to the technical field of metal materials, and particularly relates to a high-strength decorative aluminum product metal material and a preparation method thereof. The preparation method of the high-strength decorative aluminum product metal material comprises the following steps: (1) adding carbon nano onions, sulfuric acid and oxalic acid into water to prepare a mixed acid solution, immersing an aluminum matrix into the mixed acid solution for anodic oxidation, and then cleaning and drying to prepare a pretreated aluminum matrix; and (2) polyformaldehyde fibers are added into the dispersion liquid, a heating reaction is conducted, a mixed solution is obtained, the surface of a pretreated aluminum matrix is coated with the mixed solution, then heat treatment is conducted, after aging is conducted at the room temperature, cleaning and drying are conducted, and the high-strength decorative aluminum product metal material is obtained. The preparation process is simple, the product performance is stable, and the product has the properties of high strength, high hardness, wear resistance, super-hydrophobicity, self-cleaning and the like.

The invention discloses a graphene-aluminum composite material and a preparation method thereof, and belongs to the technical field of metal-based composite material preparation. The raw materials comprise modified aluminum particles and a graphene dispersing agent; the production process comprises the steps of aluminum particle interface modification treatment, graphene dispersing agent preparation, modified aluminum particle wrapping with graphene, heating pressing and heating extrusion forming. A nanometer interface modification layer is constructed on the surfaces of aluminum particles through a modifier to improve wettability and inhibit generation of Al4C3, a specially-made pressing device improves the compactness of a green body, inert gas protection is matched for extrusion, the performance of the composite material is optimized, and the problems that graphene and an aluminum matrix are poor in interface compatibility, prone to agglomeration, prone to generating brittleness at high temperature and the like are solved; the graphene is uniformly dispersed, and the composite material has excellent mechanical properties and high conductivity and is suitable for industrial mass production.

The invention discloses a coating for preventing the surface layer of an aluminum bar from being oxidized. The coating is composed of a porous composite ceramic inner coating and a high-entropy alloy outer coating. The preparation method of the porous composite ceramic inner coating is a micro-arc oxidation method, the porous composite ceramic inner coating comprises aluminum oxide and boron carbide, the coating is of a porous structure, pores are uniformly distributed, and the pore diameter is small. The preparation method of the high-entropy alloy outer coating is a laser cladding method, the components of the alloy are Al-Ti-Cr-Fe-Ni-Co, and the high-entropy alloy is simple in crystal structure and excellent in comprehensive performance and has an obvious improvement effect on an aluminum matrix as a coating. The coating is tightly combined with an aluminum matrix, the preparation method is simple and controllable, the strength and hardness of the aluminum bar are enhanced, the high-temperature oxidation resistance is good, the oxidation weight increment is remarkably reduced, and the comprehensive performance is excellent.

The invention discloses a high-entropy alloy reinforced aluminum-based composite material and a preparation method and application thereof, and belongs to the technical field of metal-based composite material preparation. The composite material comprises an aluminum matrix, high-entropy alloy particles dispersed in the aluminum matrix, and a diffusion interface layer located between the aluminum matrix and the high-entropy alloy particles. The composite material can be prepared by taking a high-entropy alloy and aluminum as raw materials, carrying out ball milling and powder mixing, then mixing in an inert gas environment, carrying out cold press molding, and finally adopting a rapid hot press sintering technology. According to the high-entropy alloy reinforced aluminum-based composite material prepared through the method, high-entropy alloy particles can be evenly dispersed in a matrix, the interface problem of a reinforced phase and the aluminum matrix can be effectively solved by precisely regulating and controlling the interface reaction degree between the high-entropy alloy and the aluminum matrix, and the mechanical property and the friction resistance of the composite material are remarkably improved; good application prospects are realized in the friction field.

The invention discloses a high-damping NiTip / Al composite layer on the surface of an aluminum alloy and a preparation method of the high-damping NiTip / Al composite layer. NiTi particles are introduced into the surface of the aluminum alloy through a stirring friction machining technology, and the NiTip / Al surface composite layer is successfully prepared. The NiTip / Al composite layer on the surface of the aluminum alloy has excellent low-temperature and room-temperature damping performance, and the damping performance of the NiTip / Al composite layer is obviously superior to that of an aluminum matrix material. The maximum internal friction values of the surface composite layer can reach 0.0126, 0.0116, 0.0120, 0.0122 and 0.0105 respectively at room temperature (27 DEG C),-90 DEG C,-55 DEG C, 0 DEG C and 60 DEG C respectively, and are 2.17 times, 2.64 times, 2.31 times, 2.18 times and 1.78 times of the internal friction values of the corresponding aluminum matrix material respectively, and the internal friction values of the surface composite layer can reach 0.0126, 0.0116, 0.0120, 0.0122 and 0.0105 respectively at room temperature (27 DEG C),-90 DEG C,-55 DEG C, 0 DEG C and 60 DEG C. NiTi particles in different aging states are adopted as reinforcing phases, so that the damping performance of the surface composite layer can be effectively improved, and the phase change damping temperature zone of the surface composite layer can be regulated and controlled according to actual needs.

The invention discloses a graphene reinforced Al-Cu composite material and a preparation method and application thereof, and belongs to the technical field of metal matrix composite materials and preparation thereof. The problems that in an existing graphene reinforced aluminum matrix composite, graphene is poor in dispersity in an aluminum matrix, and harmful interface reaction is serious at the high temperature are solved. According to the preparation method, the surface of aluminum powder is plated with nano-copper particles through chemical plating, the potential of the aluminum powder in a water medium is regulated and controlled through a copper plating layer on the surface, the surface of the aluminum powder is provided with positive charges, graphene can be evenly dispersed in a matrix through electrostatic self-assembly, and meanwhile the surface copper plating layer is used for inhibiting interface reaction and hindering generation of a brittle phase. In addition, by adding the metal copper, the solid solution and second phase strengthening effects can be achieved, and the mechanical property of the composite material is further improved.

The invention discloses a rare earth aluminum alloy conductor material which comprises magnesium, silicon, boron and a rare earth element, the rare earth element comprises one of lanthanum, cerium, yttrium and erbium, and the balance is aluminum. Wherein in terms of mass fraction, the mass fraction of the magnesium is 0.2%-0.8%, the mass fraction of the silicon is 0.1%-0.5%, the mass fraction of the boron is 0.01%-0.15%, the mass fraction of the rare earth element is 0.1%-0.15%, and the balance is aluminum. Trace elements are introduced into the aluminum alloy to serve as microalloying elements. The atomic radius of the microalloying elements is generally much larger than that of aluminum, the solid solubility of the microalloying elements in an aluminum matrix is very low, lattice distortion and electron scattering caused by a large number of solute atoms are avoided, and the negative influence on conductivity is reduced; and the electron orbits of the compounds are complex, so that stable intermetallic compounds or second-phase particles can be easily formed.

The invention discloses a high-strength and high-plasticity low-melting-point aluminum alloy brazing material and a preparation method and application thereof, and relates to the technical field of solder manufacturing. The low-melting-point aluminum alloy welding flux is prepared from the following components in percentage by weight: 10 to 14 percent of Si, 4 to 20 percent of Cu, 0.04 to 0.25 percent of Eu, 0.78 to 0.82 percent of Fe, 0.13 to 0.17 percent of Mn, 0.08 to 0.12 percent of Mg, 0.18 to 0.22 percent of Zn and the balance of aluminum and inevitable impurities. The Al-Si-Cu ternary alloy is constructed to form a low-melting-point eutectic phase, the melting point of the material is effectively reduced, meanwhile, Eu atoms are doped, the aluminum matrix is subjected to the pressure stress effect, the interplanar spacing is reduced, the grain size of the matrix aluminum phase is reduced, the elemental Si phase is refined, the eutectic Al-Si phase content is increased, and precipitation of the brittle Al2Cu phase is restrained; therefore, the aluminum alloy solder has high tensile strength and elongation after fracture under the condition that the melting point is low.

The invention provides TiB2 reinforced aluminum-based composite powder, a preparation method and application of the TiB2 reinforced aluminum-based composite powder and a TiB2 reinforced aluminum-based composite material. The preparation method of the TiB2 reinforced aluminum-based composite powder comprises the following steps: preparing 7xxx series aluminum alloy into a rod-shaped electrode; an electrode induction melting gas atomization method is adopted, a rod-shaped electrode is atomized into an aluminum matrix liquid flow, meanwhile, TiB2 powder is added, so that the 7xxx series aluminum alloy and the TiB2 powder are subjected to co-deposition, and TiB2 reinforced aluminum matrix composite powder is obtained; the total weight of the TiB2 reinforced aluminum-based composite powder is 100%, and the total feeding amount of the TiB2 powder is 8%-10%; and the particle size of the TiB2 powder is nanoscale. On the basis of a crucible-free electrode induction melting gas atomization (EIGA) mode, gas atomization co-deposition of nanoscale TiB2 particles and aluminum alloy molten drops is achieved at a powder manufacturing source, and the purposes that a reinforced phase is evenly dispersed and the material is high in cleanliness are achieved.

The invention relates to the field of oil-water coolers, and discloses an oil-water cooler, which comprises: a heat exchange core material, which is a graphene aluminum-based composite material; and a heat exchange module with a micro-nano structure is arranged on the surface. The graphene aluminum-based composite material is adopted as a heat exchange core material of the oil-water cooler, so that the heat conduction performance and the overall heat exchange efficiency of the cooler are effectively improved. By optimizing the interface bonding process of the aluminum-based material and the graphene, the graphene is uniformly dispersed in the aluminum matrix, and meanwhile, it is ensured that heat conduction channels in the material are more continuous and dense, so that the thermal resistance loss of the material is remarkably reduced. The equivalent thermal conductivity of the composite material is greatly improved through the high thermal conductivity of graphene, and compared with a traditional aluminum-based material, the heat exchange efficiency is improved by 30% or above. Besides, the mechanical property of the composite material is strictly designed and verified, and the composite material can run for a long time under high-temperature and high-pressure working conditions and is not prone to deformation or fracture, so that the stability and durability of the cooler in a complex industrial environment are guaranteed.

The invention discloses a preparation method of a graphene reinforced 2024Al composite material (Gr / 2024Al) with a three-dimensional network structure, and relates to a preparation method of a metal composite material. The invention aims to solve the following problems: 1, the structural integrity of graphene treated by a ball milling method is seriously damaged to cause poor interface reaction; and 2, the graphene subjected to ball milling treatment is high in energy, so that solute atoms are not uniformly dispersed, and negative effects are generated on the subsequent aging behavior and the mechanical property of the material. The preparation method disclosed by the invention comprises the following steps: 1, preparing GO-2024Al composite powder by an electrostatic self-assembly method; secondly, a Gr / 2024Al composite material is prepared through a hot pressing sintering method; and thirdly, the Gr / 2024Al composite material is subjected to solid solution aging heat treatment, and the mechanical property of the Gr / 2024Al composite material is further improved. The graphene reinforced 2024Al composite material with the three-dimensional network structure has the following characteristics that 1, the graphene structure is complete, and the graphene is uniformly dispersed in an aluminum matrix; 2, the graphene / aluminum matrix interface is combined cleanly and tightly; and 3, the mechanical property of the composite material is high.

The invention discloses a graphene / aluminum alloy composite material with high conductivity and a preparation method thereof, and belongs to the technical field of metal-based composite materials. And the electric conductivity is not lower than 70% IACS. The preparation method comprises the following steps: carrying out surface copper plating pretreatment on aluminum alloy powder; performing ultrasonic dispersion on graphene by using a polyvinyl alcohol solution to obtain a stable dispersion liquid; mixing, stirring, drying and filtering the copper-plated powder and the graphene dispersion liquid to obtain graphene-coated composite powder; and finally, carrying out rapid densification sintering by adopting a spark plasma sintering technology. The core innovation point of the preparation method is that the problem of dispersion and interface combination of graphene in an aluminum matrix is solved synergistically through combination of a copper plating transition layer and PVA auxiliary dispersion-adsorption coating, then interface reaction is avoided through SPS rapid sintering, finally, the composite material with excellent conductivity is obtained, and the technical index reaches the domestic leading level.

The invention discloses an aluminum alloy material for a high-speed asynchronous motor cast aluminum rotor and a preparation method thereof. The aluminum alloy material comprises: 0.3wt%-1.5wt% Ni, 0.2wt%-0.5wt% Fe, 0.2wt%-1.0wt% Si, 0.1wt%-0.8wt% Mg, 0.2wt%-1.0wt% Cu, 0.004wt%-0.05wt% B, 0.0025wt%-0.015wt% Ca, 0.15wt%-0.5wt% Zr, 0.005wt%-0.02wt% Sr, 0.0045wt%-0.025wt% P and V, M n, Ti, Cr, the balance is Al, and the overall content of V, Mn, Ti, Cr is 0~0.05wt%; the present invention designs the mutual combination of elements Mg\Si\Ca, B\Mn\Ti\V\Cr, Cu\Ni and combines it with a specific heat treatment process, controls the precipitation and solid solution of the second phase Mg2Si, Al2CuNi, Al3Fe, AlNi3 components through appropriate temperature and time, reduces the solid solubility in the aluminum matrix, and under the condition that the electrical conductivity is close to that of pure aluminum, the yield strength is increased by 4 times relative to pure aluminum, thereby solving the problem of motor failure caused by rotor deformation and bore sweeping in current asynchronous motors under high-speed application conditions.

The invention relates to the technical field of aluminum materials, in particular to a high-strength aluminum material and a preparation process thereof, solves the defects in the prior art, and comprises the following components: aluminum, copper, magnesium, manganese, aluminum carbonitride, silicon carbide, carbon nanotubes and zinc. The aluminum matrix and the reinforcing phase complement each other, aluminum serves as a lightweight matrix and provides good machinability and corrosion resistance, the metal reinforcing phase such as copper, magnesium and manganese is added, a multi-stage reinforcing structure is formed in the aluminum matrix in the forms of gradient distribution, nano precipitation and the like, and the mechanical property of the material is remarkably improved.

The invention provides an aluminum-based bionic composite material with a titanium alloy as a skeleton reinforcement phase and a preparation method of the aluminum-based bionic composite material, and belongs to the field of metal-based composite materials. The aluminum-based bionic composite material with the titanium alloy as the framework reinforcement phase comprises an aluminum matrix and the titanium alloy framework reinforcement phase. The titanium alloy skeleton reinforced phase is of a porous structure with the characteristics of a bionic tooth enamel columnar microstructure, and the porous structure is cylindrical through holes which are densely distributed; the aluminum matrix is filled in the cylindrical through hole; the volume percent of the titanium alloy framework reinforcement phase in the aluminum-based bionic composite material with the titanium alloy as the framework reinforcement phase is 30-80%. The tensile strength of the aluminum-based bionic composite material can reach 811 MPa, the percentage elongation after fracture can reach 10.3%, the bending strength can reach 1491 MPa, the fracture toughness can reach 47 MPa.m < 1 / 2 >, and the aluminum-based bionic composite material shows an excellent toughness synergistic effect.

The invention belongs to the technical field of molten salt electrolysis, and particularly relates to an electrolytic bath and method for preparing aluminum alloy through low-temperature molten salt electrolysis. The electrolytic cell comprises a cell shell, a cover plate, a heat preservation layer, a bottom insulation layer, an auxiliary heating device, a gas recovery device, a cathode guide rod, an anode guide rod, a consumable cathode and an anode lining, according to the method, chlorate is used as a molten salt system, chlorides of alloy elements are used as raw materials, and solid aluminum is used as a consumable cathode for electrolysis. In the electrolysis process, alloy elements are separated out on the surface of cathode solid aluminum and are alloyed with an aluminum matrix to form the aluminum alloy, and aluminum alloys with different components can be prepared by controlling the electrolysis temperature and components of a fused salt system.

The invention relates to a method for improving the thermal conductivity of an aluminum-silicon composite material, which is characterized in that alpha-Al crystal grains and a silicon phase of an aluminum-silicon alloy are regulated and controlled through a high-temperature solid solution and low-temperature aging process, the solid solubility of a silicon element in a collective body is reduced, and the thermal conductivity is improved. The silicon phase is spheroidized through high-temperature solution treatment, the aluminum-silicon two-phase interface density is reduced, meanwhile, growth of aluminum matrix crystal grains is promoted through high temperature, and the crystal boundary density of an aluminum matrix is reduced; and subsequent low-temperature aging treatment promotes sufficient diffusion and precipitation of silicon elements, lattice distortion of an aluminum matrix is reduced, and the heat conductivity of the aluminum-silicon alloy is further improved.

The invention relates to a preparation method of a porous aluminum-based composite material capable of reducing damage of hollow glass microspheres, belongs to the technical field of aluminum-based composite materials, and solves the problems in the prior art that the hollow glass microspheres are easy to be unevenly distributed in an aluminum matrix and are easy to soften and crack. The invention discloses a preparation method of a porous aluminum-based composite material capable of reducing damage of hollow glass microspheres. The preparation method comprises the following steps: step S1, preparing a composite preform; step S2, vacuum air pressure infiltration: carrying out vacuum air pressure infiltration on the foam metal-hollow glass microsphere composite preform; and S3, obtaining a finished product. The preparation method of the porous aluminum-based composite material capable of reducing damage of the hollow glass microspheres is simple in process, easy to operate and high in safety, and the hollow glass microspheres in the obtained porous aluminum-based composite material are high in integrity and uniform in distribution.