34 results about "Spray forming" patented technology

The invention relates to the technical field of non-ferrous metal processing, and particularly provides a preparation method of a high-strength beryllium-containing Al-Mg-Zn-Cu series aluminum alloy profile. The preparation method of the high-strength beryllium-containing Al-Mg-Zn-Cu series aluminum alloy profile comprises the following steps that S1, after alloy raw materials are subjected to smelting treatment and refining treatment, an ingot blank is obtained through casting treatment or spray forming treatment; s2, the ingot blank is subjected to homogenization treatment and extrusion treatment, and an extruded profile is obtained; and S3, the extruded profile is subjected to solid solution quenching treatment and two-stage aging treatment, and the high-strength beryllium-containing Al-Mg-Zn-Cu series aluminum alloy profile is obtained. According to the invention, specific extrusion process parameters are adopted and a two-stage aging heat treatment system is combined, so that the preparation of the low-cost, low-density, high-strength and corrosion-resistant aluminum alloy profile is successfully realized.

The invention discloses a preparation method for improving the corrosion resistance of a spray-formed aluminum alloy component, and belongs to the field of preparation of high-performance metal materials. According to the method, a high-frequency alternating magnetic field with specific parameters (such as the strength of 0.2 T-0. 8T and the frequency of 5kHz-50kHz) is synchronously applied in the deposition stage of spray forming, so that the magnetic field force acts on molten drops which are being solidified and a semi-solid layer. According to the method, nucleation, growth and spatial distribution of a nano precipitated phase and a nano dispersed phase are actively intervened in situ through magnetic field induced micro-area convection and interface energy regulation and control, so that the microscopic heterogeneity which is easy to cause corrosion is fundamentally optimized; compared with a conventional spray forming process without a magnetic field, according to the method, the corrosion current density of the 7075 aluminum alloy in a 3.5% NaCl solution can be reduced by about 60%, the pitting potential positive shift exceeds 80 mV, the service life of a component in a severe environment is remarkably prolonged, and the reliability of the component in the severe environment is remarkably improved.

The utility model belongs to the technical field of metal preparation, and particularly relates to a spray forming device for preparing a dispersion strengthened copper-based material, which comprises a spray deposition chamber, two groups of spray assemblies are arranged above the spray deposition chamber, each group of spray assembly comprises a spray nozzle, each spray nozzle comprises a spray orifice, a spray deposition disc is arranged in the spray deposition chamber, and a spray nozzle is arranged on the spray deposition disc. The jet orifices are all aligned to the upper surface of the jet deposition disc, jet orifices of the nozzles in one set of jet assemblies and jet orifices of the nozzles in the other set of jet assemblies are aligned to the same point of the jet deposition disc, and the jet deposition disc is connected with a rotary lifting driving device so as to drive the jet deposition disc to rotate and ascend and descend synchronously. According to the utility model, through the characteristic of rapid solidification of the spray forming technology, the problem of uniform dispersion phase distribution of the oxide dispersion strengthened copper-based material is reasonably solved, and billets with fine crystal grains, no macrosegregation and lower impurity content are prepared.

This invention discloses an on-demand metal jet forming method based on forced vibration, belonging to the field of 3D printing technology, including the following steps: Step 1, calculating the resonant frequency f of the molten metal column in the nozzle. n Step 2: Determine the excitation frequency f of the forced vibration system; Step 3: Input an excitation signal with frequency f into the forced vibration system, which drives the nozzle to vibrate axially; The forced vibration of the nozzle includes an unstable start-up stage and a stable stage. After the nozzle vibration enters the stable stage, a stable metal droplet jet with frequency f is generated; Step 4: After obtaining the stable metal droplet jet, the base plate is subjected to three-dimensional motion, and metal deposition is performed using the metal droplet jet to complete the forming of the metal component. The spraying frequency of this invention can reach tens of thousands of hertz, which can greatly improve the manufacturing efficiency of droplet-spraying metal additive manufacturing.

The invention provides a manufacturing and performance verification method of a spray-formed aluminum alloy forge piece for a helicopter, and the method comprises the following steps: carrying out spray forming on uniformly mixed metal powder to obtain a spray-formed aluminum alloy ingot blank; carrying out extrusion hot processing on the spray-formed aluminum alloy ingot blank; forging the ingot blank subjected to extrusion hot processing; the forged forge piece is subjected to heat treatment; and carrying out performance verification on the forged piece subjected to heat treatment. The spray-formed aluminum alloy forge piece manufactured based on the method can meet the weight reduction design requirements of typical bearing frames and other parts of helicopters, structural weight reduction is achieved, and the development requirements of ultra-light structures and high specific strength are met.

A kind of porosity controllable additive manufacturing method of nickel-manganese-tin-cobalt alloy and application of the obtained product.The present application belongs to the field of solid refrigeration.The present application aims at the intrinsic brittleness of nickel-manganese-tin-based alloy,which is difficult to be processed into complex-shaped parts by traditional casting and numerical control processing,limiting its application.Meanwhile,aiming at the problem that the existing additive manufacturing method is easy to produce residual stress and element segregation,which affects the structural integrity and magnetic heat performance of the alloy.The present application uses water-based binder to carry out layer-by-layer spray forming of alloy powder,then adds deoxidizer and manganese powder,and carries out high-temperature sintering under vacuum condition to obtain nickel-manganese-tin-cobalt alloy with controllable porosity.The method of the present application effectively avoids the oxidation of the sample,so that the sample maintains good magnetic-structural characteristics,and obtains nickel-manganese-tin-based alloy with specific porosity,phase transition temperature interval near room temperature,and magnetic heat performance comparable to that prepared by traditional method,which shows broad application prospects in the field of magnetic refrigeration and other fields.

The invention belongs to the technical field of metal material hot working, and provides a method and system for constructing a thermal deformation constitutive model of a spray-formed 2195 aluminum-lithium alloy, and the method comprises the following steps: obtaining flow stress data according to a hot compression test; correcting the flow stress data to obtain calibrated flow stress data; identifying a peak stress and a material constant according to the calibrated flow stress data, and summarizing a Z parameter expression; introducing a strain influence function according to the material constant, and fitting a strain function; and substituting the strain function into the Z parameter expression to obtain a constitutive model. According to the method, the high-precision constitutive model considering the strain influence is established for the extrusion state spray forming 2195 aluminum lithium alloy for the first time, material parameters under different strains are identified through a system, the applicability of the model in a large deformation forming process is remarkably improved, and the prediction error is lower than 5%; a reliable theoretical tool is provided for formulating a hot working process, the trial and error cost is reduced, and the product quality and the structure uniformity are improved.

The invention provides a semi-solid thixoforming method and system for a spray-formed aluminum alloy blank, and is applied to the technical field of aluminum alloy machining. The method comprises the following steps: heating a spray-molded aluminum alloy blank to a semi-solid temperature zone, so that the internal liquid phase fraction of the spray-molded aluminum alloy blank reaches 30-70%, and forming semi-solid slurry formed by coating solid-phase spherical particles with a uniform liquid film; placing the semi-solid slurry in a lower die of a forming die, and controlling an upper die of the forming die to press downwards by adopting a segmented pressure control process, so that the semi-solid slurry completes defect repair and forming in a closed cavity, and a deformed aluminum alloy forge piece is obtained; and the deformed aluminum alloy forge piece is cooled and solidified, and the target aluminum alloy forge piece is obtained. According to the method, precise forming of the aluminum alloy forge piece and synchronous elimination of microstructure defects are effectively completed, and the density, the mechanical property and the forming precision of the aluminum alloy forge piece are remarkably improved.

The utility model discloses a nickel-based superalloy non-vacuum furnace smelting device, which comprises an intermediate frequency furnace, a smelting furnace, a high-temperature furnace, a high-temperature furnace, a high-temperature furnace, a high-temperature furnace, a high-temperature furnace, a high-temperature furnace, a high-temperature furnace and a high-temperature furnace, a ceramic support is annularly arranged on the bottom side of the air injection assembly, the air injection assembly is placed at a furnace opening of the intermediate frequency furnace through the ceramic support, and a plurality of air nozzles are evenly distributed on the air injection assembly in the circumferential direction. The gas nozzles are arranged towards the interior of the intermediate frequency furnace, and inert gas sprayed out of the gas nozzles forms a protective gas layer above the smelting molten steel; the gas supply source is arranged on the outer side of the intermediate frequency furnace, is communicated with the gas nozzle pipeline and provides inert injection gas for the gas nozzle; during use, furnace charge is prepared firstly, then the furnace charge is put into an intermediate frequency furnace to be smelted, during smelting, a protective gas layer used for isolating air needs to be formed above molten steel through an air injection assembly, inclusion in the molten steel is avoided, then the molten steel is used for casting and molding products, and production of nickel-based superalloy castings under the non-vacuum condition is met.

The application discloses a spray forming cold-rolled work roll blank and a preparation method thereof. By designing material components, the toughness of the base body is increased to meet the rolling requirement of ultra-high strength steel. Meanwhile, the spray forming technology is adopted, so that the prepared spray forming cold-rolled work roll blank has comprehensive improvement in normal temperature and high temperature mechanical properties, especially the high temperature toughness, wear resistance and heat crack resistance are greatly improved, so as to solve the peeling, uneven carbide and relatively insufficient wear resistance of the high-speed steel work roll prepared by ESR smelting and forging technology.

The present application relates to a kind of atomizing device for increasing the diameter of spray forming deposit and reducing porosity, comprising: multiple nozzle type pouring mechanism, swing type atomizing mechanism and rotary lifting type deposition disc;Rotary lifting type deposition disc is set in the spraying distance and spraying area range of multiple nozzle type pouring mechanism;Swing type atomizing mechanism is used to adjust the swing amplitude of atomizing nozzle in multiple nozzle type pouring mechanism, and the spraying angle and number of atomizing nozzle are matched with the sand molding of tundish and the position of pouring nozzle;Swing type atomizing mechanism is also provided with rotary servo motor and crank rocker mechanism.The beneficial effects of the present application are: the atomizing device used, by setting swing type atomizing mechanism, by setting the parameters of crank rocker mechanism in swing type atomizing mechanism, driving the reciprocating swing of air nozzle flat shaft within a certain angle, adjusting the spraying angle and swing amplitude of atomizing nozzle, and the spraying angle and swing amplitude of atomizing nozzle determine the width of spraying coating area.

The present application belongs to the technical field of metal material processing, and relates to a densification process for spray forming high-strength aluminum alloy. After large deformation densification treatment of the spray forming ingot, subsequent solid solution treatment and aging treatment are carried out. The hot and force coupling is used to close the pores through plastic deformation and diffusion. The semi-finished product with excellent structure and density is obtained through large extrusion ratio or large deformation forging, the advantages of rapid solidification of spray forming are retained, the material is further strengthened and toughened through thermal mechanical treatment, the cost is reduced, the grain is refined, the comprehensive mechanical properties are improved, the internal loose defects of the high-strength aluminum alloy ingot prepared by spray forming are reduced, and finally the aluminum alloy material with tensile strength > 800 MPa and density > 99% is obtained. The applicable alloy composition is as follows: Cu 1.4-1.8%, Mg 2.2-2.6%, Zn 10.0-12.0%, Mn 0.02-0.05%, Zr 0.10-0.20%, Ti 0.02-0.05%, impurity element Si <= 0.10%, Fe <= 0.12%, other impurities <= 0.05% in total, <= 0.15% in total, and the balance is Al.

The invention provides a liquid drop spray forming method for a carbon / magnesium composite material and aluminum alloy composite heat dissipation structure, and solves the problem that in an existing forming method for the carbon / magnesium composite material and aluminum alloy composite heat dissipation structure, in-situ forming of a novel large-specific-surface-area heat dissipation structure on the surface of the carbon / magnesium composite material cannot be achieved. According to the method, aluminum alloy tiny liquid drops are directly deposited on the surface of the carbon / magnesium composite material subjected to surface treatment through a metal micro-drop jetting 3D printing technology, in-situ forming of an aluminum alloy heat dissipation structure is achieved through point-by-point printing of the aluminum alloy micro-drops, and magnesium element evaporation or surface damage caused by formation of a high-temperature molten pool is avoided; and through in-situ heat treatment of the 3D printing hot bed, printing heat stress is eliminated, and magnesium-aluminum interface high-strength combination is formed.

The application discloses a spray forming wear-resistant and corrosion-resistant double-strengthening-phase precipitation hardening high-speed steel, which comprises the following components in percentage by mass: C: 0.2%-2.6%; Si: 0%-0.4%; Cr: 5.0%-15.0%; Co: 10.0%-30.0%; Ni: 0%-2.0%; (1.39Co+1.4Ni): 15.0% or more; V: 0%-8.0%; W: 0%-5.0%; Mo: 8%-20.0%; (Mo+W / 2): 10.0%-22.0%; and the balance of iron and impurities, wherein the steel is a double-strengthening-phase precipitation hardening high-speed steel, the strengthening phase comprises intermetallic compound (IMC) mu phase, MC carbide and (Cr, Fe) C type carbide, the mu phase is (Fe, Co) 7 (Mo+W / 2) 6 type, and the type of the MC carbide is V(C, N) type. The mu phase and the carbide of the prepared precipitation hardening high-speed steel are small in size and uniform in distribution, and the prepared precipitation hardening high-speed steel has excellent comprehensive performance, especially outstanding wear resistance and corrosion resistance, and can meet the requirements of different working conditions. The spray forming process is adopted in the application, and the spray forming process has the advantages of low cost and fast process compared with the powder metallurgy process.

The utility model discloses a spray forming steel surface hardening post -treatment device, it includes work table, clamping assembly and cleaning component, the top fixed connection of work table has the guide, the output fixed connection of electric telescopic handle has clamping block, the cleaning component includes rotary disc, sliding support frame and motor, the sliding support frame slides on the guide, the inner wall fixed connection of rotary disc has damping rod, one side fixed connection of damping rod has brush, through above -mentioned structure, through the clamping assembly steady fixation work piece of four corners distribution, the compound motion of rotary disc rotation and sliding support frame horizontal movement in combination cleaning component, drive its inside circumference uniform distribution, have the brush close work piece surface of elasticity, and ensure brush rotation axis and work piece center axis alignment, have promoted the evenness and adaptability of cleaning action to work piece surface, effectively avoided the cleaning dead angle or uneven force.

A centrifugal disc for centrifugal spray forming, a plurality of liquid throwing grooves are arranged on the disc surface of the centrifugal disc in the circumferential direction, the center line of the liquid throwing groove is a logarithmic spiral line with the center of the disc surface as the center; a molten liquid cylinder is arranged at the center of the disc surface, the cylinder wall of the molten liquid cylinder is provided with liquid outlet holes communicated with each liquid throwing groove; a piston rod is arranged in the molten liquid cylinder, the piston rod can slide up and down, and is used for closing or opening the liquid outlet holes, so that the metal melt in the molten liquid cylinder is thrown out from the liquid outlet holes in intervals and quantitatively, and then the droplets with nearly consistent diameters are obtained. In addition, the liquid throwing groove can throw the droplets along the radial direction of the centrifugal disc to impact the deposition layer in the positive direction, so that the problem of the reflected droplets impacting the deposition layer again is solved from the source. Compared with the oblique impact, the positive impact in the radial direction is not only beneficial to improve the density of the fusion of the droplets and the deposition layer and form fine grain structure, but also the droplets can be almost completely fused on the deposition layer, so that the effective deposition rate of the metal material is greatly improved.

The application discloses a homogenization process for super-high-strength aluminum alloy based on a pore evolution and thermal coupling simulation model and belongs to the technical field of metal heat treatment. In view of the problems of poor plasticity, high porosity and difficult organization regulation of a large-size super-high-strength aluminum alloy ingot prepared by spray forming, the application adopts a three-stage ladder homogenization, hot compression densification, thermal coupling simulation and two-stage solid solution and aging integrated process, establishes a quantitative model coupled with an Arrhenius constitutive equation, dynamic recrystallization and pore evolution, realizes the cooperative regulation of coarse precipitated phase dissolution, pore closure and organization refinement, shortens the homogenization cycle by more than 30%, reduces the residual porosity to less than 0.3%, increases the elongation by more than 50%, and is stable and excellent in mechanical properties. The simulation precision R is greater than or equal to 0.95, and the application is suitable for the preparation of large-size super-high-strength aluminum alloy components.

The invention relates to a large-size spray-formed aluminum-silicon-copper-magnesium alloy material. The aluminum-silicon-copper-magnesium alloy material comprises the following components in percentage by mass: 24-26% of Si, 0.8-1.2% of Mg, 3.5-4.5% of Cu, 0-0.4% of Fe and the balance of Al. The silicon content of the prepared aluminum-silicon-copper-magnesium alloy material is as high as 25%, a spray forming technology is adopted to solve the problem of a traditional aluminum alloy preparation process, thermal deformation, heat treatment and other wrought aluminum alloy production processes are combined, and the high-performance aluminum-silicon-copper-magnesium alloy material and parts made of the aluminum-silicon-copper-magnesium alloy material are provided for the industries of automobiles and the like.

The invention relates to an aluminum alloy forge piece deformation treatment method, which belongs to the technical field of aluminum alloy material processing, and comprises the following steps: thermal deformation treatment: compressing a heated aluminum alloy forge piece to uniformly deform the aluminum alloy forge piece; solid solution quenching treatment: carrying out solid solution quenching on the aluminum alloy forge piece subjected to thermal deformation treatment; cold pressing treatment is conducted, specifically, the aluminum alloy forge piece obtained after solution quenching treatment is placed in a cold pressing cavity of a cold pressing mold for cold pressing treatment; and aging treatment is conducted, specifically, the aluminum alloy forged piece subjected to cold pressing is placed in a heating furnace to be subjected to aging treatment. The method comprehensively considers the residual stress and performance matching of the forge piece, is particularly suitable for quenching residual stress elimination and performance control of the spray-formed 7055 aluminum alloy forge piece, and can effectively reduce the quenching residual stress and improve the mechanical property of the forge piece by reasonably designing the thermal deformation amount, the cold pressing deformation amount and the heat treatment parameters; the machining deformation is effectively reduced, the toughness matching is optimized, and the method is suitable for large-scale industrial popularization and application.

The invention relates to a corrosion-resistant aluminum alloy and a preparation method thereof. The aluminum alloy comprises, by mass, 7%-13% of Mg, 0.5%-1.5% of Si, 1.5%-3.5% of Zn, 0.1%-0.5% of Cu, 0.15%-0.25% of Sc, 0.1%-0.5% of Zr, 0.1%-0.3% of Er, 0.005%-0.03% of Ti, 0.1%-0.3% of Cr and the balance Al and inevitable impurities, and the total content of the impurities is smaller than 0.1%. The preparation method comprises the steps of smelting and refining, wherein alloy elements and a refining agent are sequentially added into a molten aluminum ingot, and refining liquid is obtained through argon refining; grain refinement is carried out, an Al-5Ti-1B alloy rod is added, and online degassing and filtering are carried out; spray forming, wherein the alloy liquid is atomized and deposited on a rotating base body disc to form an ingot blank; two-stage aging treatment is conducted, and solid solution, water mist quenching and three-stage stepped aging are conducted; and subzero treatment is conducted, and circulation is conducted multiple times under the low-temperature and heating alternating condition. Through the multi-element microalloying and spray forming combined cryogenic strengthening process, the corrosion resistance of the aluminum alloy in the chloride ion environment is remarkably improved, and the aluminum alloy has excellent mechanical properties and structure stability and is suitable for the fields of ocean engineering, aerospace and the like.

The application belongs to the technical field of metal materials and radiation protection, and particularly relates to a preparation method of a thermal neutron shielding steel. The method utilizes the gas-solid two-phase flow driving mechanism under a negative pressure environment to realize high-efficiency spray forming of B4C / 304 stainless steel composite material, B4C ceramic particles are uniformly dispersed and embedded in the 304 stainless steel matrix, and the B4C particles and the matrix form a firm interface bonding due to the strong driving force of the gas-solid two-phase flow. The process combines gas atomization and solid-phase medium particles to form a gas-solid two-phase mixed flow, greatly improves the atomization efficiency, refines the powder particle size, optimizes the distribution of the reinforcing phase, and opens up a new way for the preparation of high-performance thermal neutron shielding steel composite material.

This invention discloses a heat treatment method for spray-formed aluminum-lithium alloys containing high lithium (Sc), comprising the following steps: Step 1: placing the spray-formed high-lithium (Sc) aluminum-lithium alloy ingot in a vacuum heat treatment furnace; Step 2: raising the furnace temperature from room temperature to 470-485℃ at a first heating rate, maintaining a core-to-surface temperature difference of less than or equal to 15℃ during the heating process; Step 3: holding the ingot at 470-485℃; Step 4: raising the furnace temperature to 495-500℃ at a second heating rate; Step 5: performing a two-stage holding treatment at 495-508℃; Step 6: progressively cooling the high-lithium (Sc) aluminum-lithium alloy ingot after the holding period. This invention solves the problems of poor alloy toughness and easy cracking during processing caused by low-melting-point phases, avoids abnormal phase coarsening caused by excessive diffusion of Sc, and significantly improves the overall rationality and stability of the phase structure.

A method for spray-forming a component comprises spraying a soft magnetic composite material through a nozzle and into a mold; and adjusting a position of the mold relative to a position of the nozzle to control a deposition of the soft magnetic composite material into the mold. Adjusting the position of the mold relative to a position of the nozzle is carried out with mounting the mold on a stage such that the mold is movable relative to the nozzle and the spraying of the soft magnetic composite material is controlled to provide the deposition of the soft magnetic composite material to form the component in a near-net shape.

The high-strength and high-toughness martensitic stainless steel comprises the following alloy components in percentage by mass: less than or equal to 0.05 percent of C, 13.0 to 14.8 percent of Cr, 1.2 to 1.6 percent of Mo, 1.0 to 1.4 percent of V, 0.5 to 1.2 percent of Ti, 4.8 to 5.6 percent of Ni, 0.3 to 0.6 percent of Si, 0.4 to 0.7 percent of Mn, 0.05 to 0.10 percent of Nb, 0.0015 to 0.003 percent of Ca, less than or equal to 0.025 percent of N, less than or equal to 0.010 percent of P, less than or equal to 0.002 percent of S and the balance of Fe and inevitable impurities. The preparation method of the high-strength and high-toughness martensitic stainless steel for precise spray forming comprises the steps of raw material drying pretreatment, smelting refining, precise spray forming, hot forging densification, multi-stage heat treatment and finishing detection. In this way, the martensitic stainless steel with both strength, toughness and corrosion resistance can be obtained, and the use requirement of high-end equipment is met.

This invention discloses a cold spraying molding method for the outer wall of a combustion chamber, comprising the following steps: S1, filling with filler: first, milling grooves in the inner wall of the substrate to form grooves, and then cleaning and drying them, then filling the grooves with conductive filler until they are flush with the top surface of the grooves, and obtaining the substrate surface after the conductive filler solidifies; S2, cold spraying a pure copper layer: after cleaning and drying the substrate surface, cold spraying pure copper powder onto the substrate surface to form a pure copper layer; S3, cold spraying a pure nickel layer: after cleaning and drying the pure copper layer, cold spraying pure nickel powder onto the surface of the pure copper layer to form a pure nickel layer; S4, removing filler; The cold spraying technology used in this invention has no high-temperature process, avoiding the softening of the inner wall material and residual thermal stress during the deposition process, resulting in high bonding strength; high deposition rate, greatly shortening the manufacturing cycle of the outer wall of the combustion chamber.

The invention belongs to the field of material science and engineering, and particularly relates to a high-performance superhard wear-resistant material as well as a preparation method and application thereof. The material is a spray forming alloy designed based on a high-vanadium high-speed steel system, and the high-performance superhard wear-resistant material comprises the following chemical components in percentage by mass: 3.0-4.0% of C; 4.3% to 4.8% of W; 2.7% to 3.1% of Mn; 6.0%-6.8% of Cr; mo: 4.2%-5.2%; v: 5.7%-6.9%; 0.1% to 0.2% of Nb; and the ratio of V to C is (1.5-1.8), the ratio of V to C is (1.5-1.8), and the balance is Fe and inevitable impurities. The preparation method comprises the steps of vacuum melting, high-pressure nitrogen spray forming and optimized heat treatment. The obtained material is uniform in structure, the average size of carbides is 0.5-2 microns, and the distribution uniformity is gt; compared with traditional high-speed steel, the wear resistance of the high-speed steel material is improved by 60-80%, the service life is prolonged by 2-3 times, and the high-speed steel material can be widely applied to the fields of high-temperature and high-speed cutting tools, molds and additive manufacturing powder.

The invention relates to the technical field of heat treatment, in particular to a heat treatment method for spray-formed 7055 high-strength aluminum alloy. Comprising the following steps of S1, ingot casting pretreatment; s2, high-temperature annealing; s3, carrying out constant-pressure compaction; and S4, small-extrusion-ratio extrusion is carried out. According to the method, through the synergistic effect of high-temperature annealing, constant-pressure stuffy compaction and small-extrusion-ratio extrusion, composition segregation is eliminated, more importantly, the inherent high porosity problem of the spray-formed alloy is thoroughly solved, the compactness, uniformity and thermoplastic deformation capacity of the material are remarkably improved, and the risk of cracking in subsequent forging is fundamentally avoided. And through high temperature, constant speed and constant pressure, most of macrosegregation is eliminated, meanwhile, components are further homogenized, grains are refined, the dynamic recovery capacity of metal is suddenly improved, the metal flowability is greatly improved, and therefore the thermoplastic deformation capacity of the spray-formed 7055 aluminum alloy cast ingot is improved.

The present disclosure relates to a spray forming method for producing metal ingots and metal powder from a metal source of a metal or a metal alloy, comprising the steps of forming one or more streams of a metal or a metal alloy from the metal source, gas atomizing the one or more streams of a metal or a metal alloy to form a spray of one or more atomized droplets, guiding the spray of droplets through a nozzle to a rotatable hot body, depositing the droplets to the hot body to form an ingot, controlling the process parameters 1) temperature of the metal or the metal alloy, 2) inlet and outlet pressure of the nozzle, 3) rotation speed of the hot body, and / or 4) distance between the hot body and the spray of droplets, and collecting a metal powder having a predefined particle size distribution, wherein the process parameters are controlled such that the ingot yield is 60% to 80% and the metal powder yield is 40% to 20% respectively relative to the metal source.

The spray forming wear-resistant and corrosion-resistant precipitation hardening high-speed steel contains the following components in percentage by mass: C: 0.1-0.2%; Si: 0.3-0.8%; Cr: 2.0-15.0%; V: 0.05-2.0%; Co: 0-18.0%; W: 0-5.0%; Mo: 8-25.0%; (Mo+W / 2): 10.0-27.0%; the balance being iron and impurities. The precipitated phase in the spray forming wear-resistant and corrosion-resistant precipitation hardening high-speed steel includes a large amount of intermetallic compound (IMC) μ phase and a small amount of MC carbide, wherein the μ phase is of the (Fe, Co)7(Mo+W / 2)6 type, and the MC carbide is of the V(C, N) type. The μ phase and the carbide prepared by the present application are small in size and uniform in distribution, and have excellent comprehensive performance, especially wear resistance and corrosion resistance. The present application is prepared by the spray forming process, which has the advantages of low cost and fast process compared with the powder metallurgy process.

The invention relates to a preparation method of an aluminum-based composite material with high plasticity and high rigidity, and belongs to the technical field of metal-based composite material preparation. The invention aims to solve the problems of poor dispersity and weak interface bonding of a nano reinforcement in the existing aluminum-based composite material and serious work hardening in the plastic working process. The preparation method comprises the steps that firstly, aluminum alloy powder and hydride are mixed, a deposition ingot blank is prepared through a spray forming technology, and nanocrystalline is generated in situ through hydride decomposition in the process; and then carrying out plastic deformation processing on the ingot blank at 300-400 DEG C, and synchronously applying high-energy pulse current. The aluminum-based composite material prepared through the method has high rigidity and high plasticity at the same time, the elastic modulus is not lower than 92 GPa, and the ductility is not lower than 12%.