50 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 provides a special-shaped curved surface floor support plate concrete spray forming method and system, and belongs to the field of concrete forming. The method comprises the following steps: executing coordinate conversion through engineering design data to obtain a to-be-filled space coordinate; nozzle constraint coordinates are selected through a user side; when the area of the special-shaped curved surface is larger than or equal to an area threshold value, forming simulation is executed according to the concrete discharging speed and the slump degree in combination with the jet paths of the jet nozzles with and without the jet nozzles, and first concrete filling coordinates are obtained; comparing the filling coordinate with the to-be-filled space coordinate, and extracting a first hole coordinate; and when the holes all meet the preset quality standard, concrete injection molding is conducted. According to the method, the technical problems of insufficient filling degree and poor forming quality caused by inaccurate planning of the concrete spraying path of the special-shaped curved surface floor support plate in the prior art are solved, and the technical effects of accurately planning the concrete spraying path of the special-shaped curved surface floor support plate, improving the filling degree and improving the forming quality are achieved.

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 invention relates to a spray forming aluminum lithium alloy inert protection buffer cabin structure which comprises a buffer cabin, air inlet end structures are arranged on the two sides of the lower end of the buffer cabin, cabin top structures are arranged on the two sides of the upper end of the buffer cabin, and the cabin top structures are symmetrically arranged beveled lead angle structures; cabin bottom structures are arranged on the two sides of the lower end of the buffer cabin and are arc surface structures connected with the air inlet end structure and the inner wall of the buffer cabin; an air outlet structure is arranged at the top of the buffer cabin; a molten aluminum transfer trolley is arranged in the middle area of the buffer cabin; the smelting protection system comprises a gas inlet end structure, the gas inlet end structure is in a long and narrow pipeline shape, a plurality of gas inlets are formed in the top of the gas inlet end structure in the length direction of the gas inlet end structure, and the gas inlets are of rectangular strip seam structures and enable protection gas ejected out of the gas inlets to form plane jet flow. And meanwhile, the consumption of inert protective gas can be reduced, and the energy consumption and the cost are reduced.

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.

A manufacturing method and device for an anti-corrosion coating by spray forming, specifically including the following steps: Step 1, melting a prefabricated metal alloy block into alloy liquid, and the temperature of the melted alloy liquid is between 1550 degrees Celsius and 1750 degrees Celsius; Step 2, using a tundish to carry the melted alloy liquid; Step 3, starting the atomizing nozzle, atomizing the flowing alloy liquid by using the kinetic energy of an inert gas, and spraying the atomized metal liquid particles onto the surface of the processing object in the spray chamber to form an anti-corrosion layer on the surface of the processing object. The present invention adopts a process of atomizing alloy liquid flow into fine droplets by an inert gas, flying and cooling under a high-speed gas flow, and depositing into a blank before being completely solidified. The coating dilution rate is low, the coating material composition is uniform, the structure is refined, there is no macroscopic segregation, and the oxygen content is low, which is much better than the existing manufacturing methods of anti-corrosion coatings and has a broad market prospect.

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.

A split type tundish spray forming military dual-use high-strength boron steel and heat treatment process, characterized in that the content of alloying elements is: C 0.36-0.42wt%, Si 0.30-0.80wt%, Mn 2.40-3.80wt%, Cr 1.20-1.60wt%, Ni 0.3-0.6wt%, S 0.05-0.10wt%, P 0.05-0.10wt%, B 0.001-0.003wt%, the balance is Fe. The material smelting utilizes the characteristics of rapid solidification of spray forming, eliminates the macrosegregation in alloy steel, and makes the alloying elements uniformly distributed. At the same time, the split type tundish is used for smelting, the purity of liquid steel before spray steel is improved, the problems of the whole tundish that cannot be reused after pouring once, and the slag liquid is too much and the fluidity is not good are overcome, the uniform liquid steel temperature is reached and the inclusions are removed, the solidification of the easy loose part of the steel deposition billet is improved, so that the high-quality high-density spray high-strength steel is prepared. It can also effectively establish the liquid level of molten steel, so as to promote the floating of inclusions in the process of opening and pouring, and reduce the probability of inclusions blocking the liquid duct and entering the final ingot. By adding Ni, B and other micro-alloying elements in the steel, fine Fe2B particles are formed, the growth of dendritic grain boundary in austenite grain is limited, and then the grain growth is prevented.

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 invention relates to the technical field of metal material thermomechanical treatment, and particularly discloses a thermomechanical treatment method for improving the corrosion performance of Zr-containing high-strength aluminum alloy, which is technically characterized by comprising the following steps: firstly, carrying out low-speed heating two-stage thermomechanical treatment on a spray-formed 7055 aluminum alloy extruded plate; the specific process comprises the following steps: heating from room temperature to 450 DEG C at the speed of 140 DEG C / h, preserving heat for 3 hours, then heating to 475 DEG C at the speed of 50 DEG C / h, preserving heat for 3 hours, and carrying out water quenching; then carrying out hot rolling under the condition of 400 DEG C / 1s <-1 > to obtain a rolled plate, and carrying out solution treatment on the rolled plate at 470 DEG C / 2h; and carrying out 440 DEG C / 0.5-2 h high-temperature pre-aging treatment and 120 DEG C / 24 h peak aging treatment. The method provides a thermomechanical treatment system which enables the alloy to have high strength and excellent corrosion resistance and is suitable for industrial thick plates; the system shows better effects in the aspects of micron-scale second phase redissolution and distribution uniformity, precipitation of nano-scale Al3Zr particles and improvement of alloy grain structure uniformity.

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 discloses a fine-structure ceramic-metal composite material spray forming method, belongs to the technical field of 3D printing, and solves the problem that the junction of a metal material and a ceramic material on a printed piece is prone to being damaged and fractured. Comprising the following steps: preparing a micro-nano-scale metal particle suspension, a ceramic suspension and a support material which does not react with the micro-nano-scale metal particle suspension and the ceramic suspension; in practical application, different material parts and junction positions are determined according to a part model, the volume and the position of a gradual change area are determined, the gradual change area is a metal ceramic junction position, the proportion of metal and ceramic turbid liquid is adjusted according to close materials, the metal content in the area close to the metal is high, and the ceramic content in the area close to the ceramic is high. And smooth transition of metal and ceramic is ensured, the connection strength is high, synchronous sintering is achieved, the mechanical property is good, and heterogeneous interface strong bonding is achieved.

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.

The invention discloses a 3D printing process and equipment for a high-toughness wear-resistant integral roll shaft / bar, and relates to the technical field of printing equipment, and the 3D printing process and equipment for the high-toughness wear-resistant integral roll shaft / bar comprise the following steps: S1, preparing materials for later use; s2, vacuumizing the sealing cavity; s3, the deposition supporting plate is adjusted; s4, preparing a 3D printing integral roll shaft / bar; s5, liquid metal spray deposition; s6, eliminating metallurgical defects of a deposited layer; s7, the density and interlayer binding force of the additive layer are improved; s8, carrying out three-dimensional motion printing on the whole roll shaft or the whole bar; s9, post-processing is conducted; s10, printing is completed; recycled overspray powder is directly used, value-added utilization of the overspray powder formed through spray forming is achieved, material waste is reduced, and the material utilization rate is increased. Therefore, the production cost is greatly reduced, and energy conservation and emission reduction are realized.

According to the technical scheme, the continuous casting billet surface temperature control device is characterized by comprising a base, a containing groove is formed in the top face of the base, and a continuous casting billet is connected into the containing groove; the mounting frame is connected to the top surface of the base, and the top surface of the mounting frame is connected with a water tank; the cooling assembly is arranged at the bottom of the mounting frame and used for cooling the continuous casting billet, the cooling assembly comprises a mounting plate, the mounting plate is connected to the inner bottom face of the mounting frame, a moving block is arranged in the mounting plate, a cooling groove is formed in one side of the interior of the moving block, and a water spraying plate is connected to the interior of the cooling groove; a plurality of atomizing nozzles are connected into the water spraying plate, a water supply hose is connected into the water tank, one end of the water supply hose is connected into the cooling tank, a cooling medium in the water tank is input into the cooling tank through the water supply hose, and the cooling medium is sprayed on the continuous casting billet in a mist spraying mode through the atomizing nozzles; and the high-temperature part of the continuous casting billet is cooled.

The invention relates to a preparation method of a large-size spray-formed aluminum-magnesium-scandium alloy. The preparation method comprises the following steps: step 1, preparing raw materials according to the mass percent of alloy components; 2, the proportioned raw materials are placed in an induction furnace to be smelted; step 3, after the raw materials are completely molten, adding a slag remover and carrying out electromagnetic stirring; 4, the liquid metal is subjected to standing, filtered and transferred to a preheated tundish, then a deslagging agent is added, electromagnetic stirring is carried out, and secondary refining deslagging and degassing treatment is carried out; the refining agent and the melt are fully reacted through reciprocating motion of the pressing cover; 5, standing and filtering the liquid metal subjected to secondary refining, and injecting the liquid metal into a ladle leakage crucible to wait for injection; and 6, under inert atmosphere protection, liquid metal is subjected to atomization treatment to form a particle jet flow, the particle jet flow is deposited on a base body at a high speed and solidified, a large-specification aluminum-magnesium-scandium alloy ingot blank material is obtained, the alloy is free of macrosegregation, fine equiaxed crystal grains are generated, the ingot casting yield is increased, and the alloy has good machinability.