43 results about "Zn element" patented technology

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

The invention belongs to the technical field of blast furnace smelting, and particularly discloses a method for discharging a zinc element in a blast furnace. The method comprises the steps of zinc discharge triggering condition judgment, charge level lowering operation, heat system and slagging system control, air volume and top pressure control, charging system adjustment and safety monitoring, specifically, zinc discharge operation is triggered through cycle management or furnace condition fluctuation, the charge level is lowered to 13-15 m and maintained for 2-3 h, the furnace top temperature is controlled to be 300-350 DEG C, and the furnace top temperature is controlled to be 30-35 DEG C; the load is reduced to 3.5 before the material is reduced, the load is controlled to be 2.4-2.6 during the period, the air volume is gradually reduced from the initial value being less than or equal to 4200Nm < 3 > / min, and the ore coke angle is synchronously adjusted by 0.5 degree when the material line is 4-15m and the ore coke is lifted every 1m. The zinc element is efficiently and safely discharged, the zinc circulation enrichment mechanism is effectively broken, and stable operation of the blast furnace is guaranteed.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The invention relates to the technical field of catalysts, and discloses a composite metal oxide, a preparation method and application thereof, and a dehydrogenation method of 1, 4-butanediol. The composite metal oxide comprises a copper element, a zirconium element and a metal M element, the metal M element is selected from at least one of a zinc element, an aluminum element, a manganese element, a titanium element and a cerium element, the zirconium oxide comprises ZrO2 and Zr3O1-x, and the value of x is greater than 0 and less than 1. The composite metal oxide provided by the invention is particularly suitable for the dehydrogenation reaction of 1, 4-butanediol, when the composite metal oxide is applied to the dehydrogenation reaction of 1, 4-butanediol, the reaction temperature can be reduced, the catalyst is high in activity, good in stability and high in target product selectivity, and in addition, the composite metal oxide provided by the invention does not contain Cr, and is environment-friendly and pollution-free.

A plate-shaped alumina particle comprising at least one element (A) selected from the group consisting of iron, nickel, copper, chromium, cobalt, zinc, scandium and ruthenium, and titanium.

The application provides a method for improving thickness precision of 7-series aluminum alloy hot-rolled strip, which comprises the following steps: fixing the sampling time and sampling depth of the casting flow groove mushroom sample and fixing the surface turning depth of the flow groove mushroom; then, by analyzing the correlation between the thickness deviation value of the hot-rolled strip and the Cu and Zn element content in the casting flow groove mushroom sample, a thickness compensation formula of the 7-series aluminum alloy hot-rolled strip is established, and thickness compensation intervention is carried out before hot-rolling production. Thus, the thickness precision of the 7-series aluminum alloy hot-rolled strip is improved, and the product competitiveness is improved.

The method for producing an oxide sintered body according to the present invention is a method for producing an oxide sintered body using, as a starting material, an oxide containing two or more elements selected from the group consisting of In element, Ga element, and Zn element, the method satisfying the following (a)-(c). (a) The raw material is an oxide having a purity of 6N or more. (b) The grinding / mixing medium is formed from an oxide that does not contain an element other than the element selected as the starting material. And (c) slurrying using ultrapure water as a dispersion medium.

The invention discloses a creep-resistant magnesium alloy with high elasticity modulus and high damping and a preparation method thereof, and the creep-resistant magnesium alloy with high elasticity modulus and high damping comprises the following components in percentage by mass: 1.2%-3.5% of Zn element, 2.5%-12% of Gd element, 0.5%-6% of Yb element, 0.15%-1.2% of Ni element, 0.3%-0.8% of Mn element, 0-0.5% of Cu element, 0.1%-5% of HRE element and the balance of Mg element. The HRE element is one or more of a Dy element, a Sm element and a Tb element, and the mixing enthalpy delta H of the creep-resistant magnesium alloy with the high elastic modulus and the high damping is-1.1 kJ / mol to-0.2 kJ / mol. The creep-resistant magnesium alloy with high elastic modulus and high damping is suitable for the fields of aerospace, precise instruments, transportation, 3C electronics and the like, and has remarkable technical and economic values.

The application provides a method for preparing a corrosion-resistant coating on a magnesium alloy surface, which adopts a plasma spraying and electrochemical deposition process. First, a calcium-magnesium coating is formed on the surface of a base material, and then a magnesium-calcium-zinc coating is formed on the outermost layer. The composite coating has good adhesion and binding force, and can generate a dense oxide film in situ between the oxidized and unoxidized regions of the magnesium alloy. Between the Mg-Ca layer and the Mg-Ca-Zn layer, calcium and zinc have a synergistic effect, resulting in the formation of lamellar structures. These lamellar structures can significantly slow down the mechanical strength decay rate of magnesium, while also having other unexpected technical effects. The method can improve the oxidation resistance and structural compactness of the magnesium alloy material, effectively prevent the rapid degradation of the magnesium matrix, and improve the mechanical stability of pure magnesium and magnesium alloys. The addition of zinc to the outermost layer further enhances the mechanical stability of the matrix, slows down the mechanical strength decay rate of magnesium, and enables the magnesium to maintain good mechanical properties during service.

The present application relates to a kind of low content component energy spectrum analysis method, belong to metallurgical dust resource utilization and material microanalysis technical field.The method includes: preparation sample exposure center section, obtain full section image by scanning electron microscope image splicing, and different analysis regions are divided;Low multiple energy spectrum area scanning is carried out in each analysis region, and the element distribution and zinc content data of multiple positions are obtained;For each analysis region, the arithmetic mean of residual zinc content is calculated as the regional representative value;Based on the characteristic data image of zinc element distribution, high multiple energy spectrum area scanning and point scanning are carried out on the characteristic micro area of zinc element aggregation to analyze the phase form and element composition of residual zinc.The present application realizes the quantitative, zoned, spatial positioning and multi-scale characterization of residual zinc content distribution and occurrence state in metallized pellet by "overall observation-zoned statistics-micro area analysis" progressive analysis, provides more accurate data support for process optimization.

The invention relates to the technical field of detection and assay, in particular to a method for rapidly detecting the content of potassium, sodium and zinc elements in an iron-containing material, which comprises the following steps: preparing a reagent, weighing a sample, pretreating the sample, carrying out a matrix matching experiment, drawing an ICP (Inductively Coupled Plasma) working curve, and measuring the sample by using an ICP instrument, the inspection results of fly ash, blast furnace ash and electric field ash are five times of the indicating value of an instrument; according to the method, the requirement for rapidly detecting the content of harmful elements such as K2O, Na2O and Zn in the sintered ore and the fly ash can be met at the same time, a series of calibration solutions can be suitable for component determination of the sintered ore and the fly ash at the same time, the content coverage range is large, the method is suitable for detection of large-batch samples in factories, the detection and analysis time is shortened, the working efficiency is improved, and the sample dissolving method is optimized; the sample dissolving time is shortened, and the detection method is simple in process.

The application provides a method for reducing the melting point of high-zinc oxide materials, which comprises the following steps: mixing high-zinc oxide materials, a slagging agent and a fluxing agent to obtain a mixture; the content of zinc elements in the high-zinc oxide materials is greater than or equal to 25 wt%; wherein the mixture comprises CaO: 5-10 wt.%, SiO2: 12-20 wt.%; FeO x : 6-12 wt.%; the fluxing agent comprises one or more of copper elements, manganese elements and lead elements. On the one hand, CaO, SiO2 and FeO x are introduced into the mixture to jointly constitute a five-component slag system ZnO-PbO-FeO x -CaO-SiO2, and the synergistic intermelting effect among the components can be achieved. On the other hand, the fluxing agent can also promote the melting of the high-zinc materials. Therefore, the melting point of the high-zinc oxide materials can be effectively reduced, the high-zinc oxide materials can be melted and flowed at a conventional non-ferrous smelting temperature, and the requirements of the smelting process of a molten pool can be met.

The application discloses a high-strength and high-plasticity cast magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by weight: Zn 1.0-6.0%, Gd 1.0-5.0%, Er 1.5-3.0%, Eu 0.1-2.0%, Ba 0.1-0.4%, Zr 0.1-1.0%, and the balance of Mg and inevitable impurities. The application can form a large number of LPSO structures in the matrix by jointly adding gadolinium and zinc elements, thereby effectively hindering dislocation slip, strengthening the matrix and improving the strength of the magnesium alloy. The gadolinium element can form a dispersed precipitated phase growing in a prismatic surface in the magnesium alloy matrix, further improving the strength of the magnesium alloy. The addition of erbium and europium can form a dispersed precipitated phase in the matrix, and the addition of barium can effectively refine the precipitated phase and increase the density of the precipitated phase, thereby improving the strength of the alloy while increasing the plasticity. In addition, the addition of Zr as a grain refiner can significantly refine the grains, improve the yield strength of the alloy and improve the plasticity.

The invention discloses a GaN-based blue-green light LED epitaxial wafer based on a Zn-doped gradient composite buffer layer and a preparation method of the GaN-based blue-green light LED epitaxial wafer. The epitaxial wafer comprises a substrate, a zinc-doped gradient composite buffer layer and a gallium nitride-based epitaxial laminated structure, and the zinc element concentration is in gradient distribution along the growth direction, preferably, the zinc element concentration is gradually reduced from the side close to the substrate to the side far away from the substrate. And the buffer layer comprises at least two of a Zn3N2 layer, a constant component ZnGaN layer or a component gradient ZnGaN layer. During preparation, the buffer layer is grown at the temperature of 400-850 DEG C, concentration gradient is realized by adjusting the flow ratio of zinc-containing and gallium-containing precursors, and forced doping is realized by adopting a 10-50-time high-flow compensation strategy in a high-temperature interval. According to the invention, lattice constant soft landing is realized by supercell matching of Zn3N2 and GaN, and nitrogen vacancy point defects are passivated in situ by using Zn atoms. Experiments prove that the luminous efficiency of the chip can be improved by about 0.81%, the ESD (Electro-Static Discharge) 4000V yield is improved to more than 98.2%, and the crystal quality and the reliability of the device are obviously enhanced.

The invention relates to an aluminum alloy plate for an attenuation-resistant ultrathin tank cover material, which comprises the following elements in percentage by mass: 0.07-0.15% of Si element, 0.07-0.15% of Al element, 0.07-0.15% of Al element, 0.07-0.15% of Al element and the balance of aluminum element. 0.15 to 0.3 percent of Fe element; 0.07%-0.15% of a Cu element; 0.3 to 0.5 percent of Mn element; 4.75%-4.95% of an Mg element; 0.01%-0.03% of a Ti element; 0.02 to 0.10 percent of Cr element; 0.01%-0.20% of a Zn element; the total content of the inevitable impurities is smaller than or equal to 0.15%; the sum of the mass of the Mn element and the mass of the Cr element in the aluminum alloy plate for the tank cover material is 0.40-0.55%. After the 0.200-0.208 mm ultra-thin 202 series two-piece can easy-open cover prepared from the aluminum alloy is subjected to 90 DEG C / 40 min water boiling aging attenuation, the pressure resistance is larger than or equal to 700 KPa, and the attenuation amplitude is smaller than or equal to 30 KPa.

The application discloses a method for improving the soluble zinc rate of zinc calcine, and belongs to the technical field of zinc metallurgy. The method for improving the soluble zinc rate of zinc calcine comprises the following steps: mixing high-temperature zinc calcine and an activating agent to obtain primary treated sand; and performing reduction treatment on the primary treated sand by using a reducing gas in an inert gas atmosphere to obtain modified zinc calcine; and the activating agent is a mixture of a sulfate and an alkaline oxide. Through the selection of the activating agent, the structure of the insoluble compounds such as zinc ferrite and zinc silicate in the zinc calcine can be broken, and the bound zinc element can be released, so that the soluble zinc rate of the zinc calcine can be greatly improved.

The application discloses a die-casting aluminum-silicon-zinc-magnesium alloy and a preparation method thereof. The alloy composition is as follows: Si 6.50-9.50%, Zn 0.5-0.8%, Mg 0.25-0.70%, Cu 0.10-0.30%, Mn 0.30-0.70%, Sr 0.01-0.04%, Fe≤0.12%, Ti≤0.01%, other impurity elements≤0.05%, and the rest is Al. The preparation method comprises the following steps: after vacuum die-casting, carrying out baking pretreatment at 100-120 DEG C for 120-240 min, and baking treatment at 175-210 DEG C for 30 min. The application utilizes the promoting effect of zinc element aging separation, and strengthens and improves the plasticity of the alloy through the baking pretreatment and baking treatment, so that the prepared die-casting aluminum-silicon-zinc-magnesium alloy is particularly suitable for high-strength and high-toughness large die-casting parts, and has a wide application prospect in the automobile field.

The application provides an aluminum alloy plate and a preparation method thereof. The preparation method comprises the following steps: after ingredients of the aluminum alloy plate are proportioned, melting, casting, integrated treatment of soaking and heating, hot rolling and cold rolling are sequentially performed to obtain a cold-rolled coil; the ingredients of the aluminum alloy plate comprise the following components in percentage by mass: 0.6-1.3% of Si element, 0.5-1.1% of Cu element, 0.6-1.2% of Mg element, 0.25% of Cr element, 0.7% of Zn element, 0.2% of Ti element, 0.2% of Zr element and the balance of Al element; the cold-rolled coil is sequentially subjected to solid solution, quenching (multi-stage cooling), straightening and pre-aging to obtain a first finished coil; and the first finished coil is subjected to differential temperature heating artificial aging treatment to obtain the aluminum alloy plate. The production efficiency of the above preparation method is high, and the comprehensive performance of the obtained aluminum alloy plate is good.

The invention discloses a preparation process and hydrogen adsorption application of a calcium-magnesium-aluminum-based porous solid hydrogen storage material, and relates to the technical field of solid hydrogen storage materials, in particular to the preparation process and hydrogen adsorption application of the calcium-magnesium-aluminum-based porous solid hydrogen storage material which is composed of calcium, magnesium and zinc according to the atomic ratio of Ca: Mg: Zn = 1: (1.5-2.5): (0.5-1.5). The phase comprises a CaMg intermetallic compound and a zinc-based solid solution, has a hierarchical porous structure (micron-scale macropores and nano-scale mesopores), and has a BET specific surface area of 30-100 m / g. The preparation process comprises the following steps: mixing the calcium powder, the magnesium powder, the zinc powder and the transition metal oxide, performing high-energy ball milling and compression molding, and sintering under a protective atmosphere at programmed temperature. The material can efficiently adsorb hydrogen under the conditions of 50-150 DEG C and 1-6 MPa, and is used for a fuel cell hydrogen source system or a portable hydrogen storage device.

The present application relates to the technical field of aluminum alloy production and processing, and particularly relates to an easily-extruded high-strength corrosion-resistant aluminum alloy, a manufacturing method thereof and an application thereof. The present application realizes the purpose of improving the material performance by using a higher Zn element while ensuring the corrosion resistance of the material by reasonably adjusting the proportion of Mg, Si and Zn elements. This method can not only improve the strength of the aluminum alloy, but also improve its corrosion resistance, thereby solving the problem of adding a large amount of alloy elements in the prior art, reducing the production cost and the difficulty of alloy element recovery. By controlling the alloy composition and the total aluminum content, the present application ensures that the extrusion deformation resistance of the aluminum alloy is small, has excellent extrudability, and controls the content of some elements to reduce the quenching sensitivity, so that the alloy can produce more complex thin-walled section shapes. The aluminum alloy material of the present application can still maintain good corrosion resistance in a high-humidity and high-salinity environment.

The invention provides a heat-treatment-free aluminum alloy and a preparation method thereof. The heat treatment-free aluminum alloy comprises the following elements in percentage by mass: 5.7-6.2% of Mg element; 2.3 to 2.9 percent of Si element; 1.9%-2.3% of a Zn element; 0.5 to 1.0 percent of Mn element; the total content of the inevitable impurities is smaller than or equal to 0.15%, and the balance is the element Al; the mass content of the MgZn2 phase in the heat treatment-free aluminum alloy is 3.20 to 5.04 percent; the mass content of an Al6Mn phase in the heat treatment-free aluminum alloy is 0.11 to 0.32 percent; the tensile strength of the heat-treatment-free aluminum alloy ranges from 345 MPa to 385 MPa, and the yield strength ranges from 230 MPa to 265 MPa. The aluminum alloy is simple in element composition, the element types and content of the heat-treatment-free aluminum alloy are controlled within the range, and the strength and the casting performance can be both considered.

The present application relates to the technical field of electroplating, in particular to a cyanide-free zinc deposition agent, a preparation method thereof and a zinc deposition method. The cyanide-free zinc deposition agent comprises the following components in terms of mass concentration: sodium hydroxide 70-130 g / L, zinc element 3-9 g / L, iron element 0.5-3 g / L, manganese element 1-7 g / L, molybdenum element 0.1-1 g / L, disodium ethylenediaminetetraacetate 50-90 g / L and triethanolamine 10-40 g / L. The cyanide-free zinc deposition agent can improve the adhesion of the zinc immersion layer, reduce the contact resistance of the zinc immersion layer, and is green and environmentally friendly.

The invention provides a catalyst for preparing methanol through carbon dioxide hydrogenation and a preparation method and application thereof. The catalyst comprises the following components: a composite metal oxide and a spinel compound (ZnO-Cu) Mn2O4. RE containing rare earth, the molar ratio of the rare earth element to the manganese element in the rare earth-containing spinel compound is 0.001-0.1, the molar ratio of the copper element to the manganese element is 0.1-1, and the molar ratio of the zinc element to the copper element is 0.1-1; the molar ratio of a copper element to a zinc element to an aluminum element to a zirconium element to a rare earth element in the composite metal oxide is 1: (0.3-1): (0.01-0.1): (0.01-0.1): (0.001-0.1); the molar ratio of the manganese element in the spinel compound to the copper element in the composite metal oxide is (1: 9)-(9: 1). The catalyst provided by the invention significantly improves the conversion efficiency of carbon dioxide and the selectivity of methanol.

The invention provides high-conductivity copper-zinc composite powder and a preparation method thereof, and belongs to the technical field of material preparation, the high-conductivity copper-zinc composite powder is a spherical powdery material prepared from micron-sized copper powder and micron-sized zinc powder through a direct current arc method, the main component of a spherical copper-zinc alloy compound is Cu5Zn8, the zinc element content is 20-80 wt.%, and the balance is copper element; the mass ratio of the micron-sized copper powder to the zinc powder is 9: 1-1: 1, the ratio of the micron-sized copper powder to the zinc powder is changed by regulating and controlling technological parameters of direct-current arc method equipment, and the size distribution of the powder and the content of zinc and copper elements are regulated and controlled. The preparation method disclosed by the invention is simple, and the obtained composite powder has good dispersity, uniform size distribution, good conductivity and strong oxidation resistance, and can be used as a powder raw material of various electronic pastes.

The invention relates to the technical field of aluminum alloy smelting and purifying equipment, and discloses a method and a device for improving the uniformity of a zinc element in a cast aluminum alloy, and the basic conception of the method is as follows: 1) immersing a zinc ingot into aluminum water of an aluminum alloy smelting production line launder by 5-10mm; and (2) the height of the zinc ingot is automatically adjusted according to the set parameters so that the zinc ingot can be kept at the optimal lifting position, and then the zinc element can be evenly distributed in the cast aluminum alloy. The invention further provides a device for improving the uniformity of the zinc element in the cast aluminum alloy, the device comprises a base and an electronic weighing device, a servo motor, an up-down lifting device, an aluminum water liquid level measuring device, a controller and a zinc ingot which are installed on the base, and the up-down lifting device is installed on the base in a lifting mode and is driven by the servo motor to ascend and descend; the zinc ingot is installed on the up-down lifting device and ascends and descends along with the up-down lifting device, and the controller is used for controlling the up-down lifting device to ascend and descend according to signals fed back by the sub-weighing device and the molten aluminum liquid level measuring device.

The application discloses high-purity quartz sand and a preparation method thereof, relates to the technical field of inorganic materials, and discloses that the content of U elements in the high-purity quartz sand is less than 0.5 ppb, the content of Th elements is less than 1 ppb, and the total content of Al, B, Ca, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, P, Ti and Zn elements in the high-purity quartz sand is less than 40 ppm; compared with the prior art, the high-purity quartz sand obtained by the application has lower contents of U and Th elements in addition to Al, B, Ca, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, P, Ti and Zn elements, and the high-purity quartz sand is used to manufacture a chip, so that soft errors caused by radioactive elements in the operation process of the chip are reduced.

The invention discloses a magnetic ZIF derived carbon composite material as well as a preparation method and application thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: mixing an iron source, a zinc source and 2-methylimidazole in a solvent, so that the molar ratio of the iron element to the zinc element to the 2-methylimidazole is (1-2): (0-1): (10-14) to obtain a mixture; standing and aging the mixture for 48-72 hours, and filtering a solid product to obtain a precursor; and placing the precursor in an inert atmosphere, and heating at 900-1100 DEG C for 2-3 hours to obtain the magnetic ZIF derived carbon composite material. The obtained magnetic ZIF derived carbon composite material has a porous carbon skeleton, and the porous carbon skeleton is uniformly loaded with an iron-based active component; the iron-based active component comprises zero-valent iron and ferroferric oxide, can be used for catalytic degradation of tetracycline, and can realize rapid separation under an external magnetic field.

The application discloses a preparation method of a porous filler metal film for brazing hard alloy and stainless steel, and comprises the following steps: (1) taking raw materials to obtain a mixed slurry by taking a binder, a surfactant, a plasticizer and a solvent according to a mass ratio of 1:0.8:0.8:6-15, and adding 5-10 wt.% of a pore-forming agent into metal powder to obtain a mixed powder; and (2) placing a stainless steel plate in a nitrogen atmosphere to dry for 2-3 hours and then taking the film. The porous filler metal film prepared by the application is a filler metal for brazing hard alloy and stainless steel, which is based on a nickel-copper active filler metal, and is modified by adding manganese and cobalt elements, wherein nickel is a strengthening element, can realize solid solution strengthening with copper elements, improves the wear resistance of the alloy filler metal, nickel and manganese elements can improve the strength of the joint, and zinc elements can reduce the welding temperature and improve the wettability of the filler metal.

The application discloses a high-strength Al-Zn-Mg-Cu-Mn alloy suitable for friction stir additive manufacturing and a forming process thereof, alloy elements including Zn: 9.0-11.0%, Mg: 1.8-2.2%, Mn: 1.5-2.0%, Cu: 2.1-2.5%, the balance of Al and inevitable impurities. The Al-Zn-Mg-Cu-Mn alloy is formed by combining friction stir additive manufacturing with a heat treatment process. The AlCuMn phase is formed by Mn and Cu elements, the grain boundary migration is inhibited, and the problem of abnormal grain growth in the solid solution treatment process after traditional high-strength aluminum alloy friction stir additive manufacturing is overcome. The MgZn2 precipitated phase of nanoscale is formed by Mg and Zn elements in cooperation with the heat treatment process of'solid solution + aging', and the strength is greatly improved. Finally, the Al-Zn-Mg-Cu-Mn alloy can be subjected to the'solid solution + aging' heat treatment after friction stir additive manufacturing, so that the strength of the friction stir additive manufacturing aluminum alloy component is greatly improved, and the application of the friction stir additive manufacturing technology in the manufacturing of large aerospace aluminum alloy components is laid a foundation.

The invention provides a 7xxx series aluminum alloy wire and a preparation method thereof, and an aluminum alloy workpiece and a preparation method thereof. The 7xxx series aluminum alloy wire is prepared from the following elements in percentage by mass: 7.0 to 9.0 percent of Zn element, 1.5 to 2.5 percent of Mg element, 0.5 to 1.5 percent of Cu element, 0.05 to 0.35 percent of Sc element, 0.05 to 0.25 percent of Zr element, less than or equal to 0.04 percent of Ti element, less than or equal to 0.15 percent of Fe element, less than or equal to 0.10 percent of Si element, less than or equal to 0.15 percent of inevitable impurities and the balance of Al element, the total mass content of the Sc element and the Zr element is 0.20-0.45%. The 7xxx series aluminum alloy wire is high in strength and not prone to cracking after being subjected to electric arc additive manufacturing and heat treatment, and the requirement for the mechanical property of aluminum alloy in the fields of aerospace and the like can be better met.