65 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 surface purification treatment method for a cast / spray-formed metal part. The surface purification treatment method comprises the following steps that 1, the cast / spray-formed metal part is subjected to ultrasonic cleaning and drying; 2, under the condition of continuous vacuumizing, baking treatment is carried out; the baking treatment comprises two continuous stages; in the first stage, the temperature is increased to 120-150 DEG C from the room temperature at the temperature increasing speed of 20-30 DEG C / min, and heat preservation is conducted for 20-30 min; in the second stage, the temperature is increased to 420-550 DEG C within 15-25 minutes, and heat preservation is conducted for 60-100 minutes; 3, etching the metal piece by adopting hydrogen-containing plasma, and removing an oxide layer on the surface of the metal piece; and 4, nitrogen is introduced to cool the metal part. When the metal piece treated by the surface purification treatment method is subjected to subsequent vacuum vapor deposition, no gas is released from the blind hole; and the surface state of the workpiece is not influenced in the purification treatment process, and subsequent vapor deposition can be directly carried out.

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 brazing filler metal preparation, and particularly relates to a low-cost method for preparing multi-element Cu-Mn-Ni-Si foil strip brazing filler metal. The preparation method comprises the following steps: smelting and casting preparation raw materials of the multi-element Cu-Mn-Ni-Si series brazing filler metal to obtain a cast ingot; carrying out primary annealing on a first semi-finished product obtained by carrying out multiple times of small-deformation hot rolling on the cast ingot to obtain a second semi-finished brazing filler metal; and the second semi-finished brazing filler metal is subjected to multiple times of small-deformation cold rolling and second annealing, and the multiple times of small-deformation cold rolling and second annealing are circularly conducted till the multi-element Cu-Mn-Ni-Si foil strip brazing filler metal is obtained. The method is easy to operate, a conventional machining device is adopted, compared with a spray forming method, an atomization method and the like, the manufacturing cost of the multi-element Cu-Mn-Ni-Si series foil strip brazing filler metal is remarkably reduced, and meanwhile the method has the advantage of being wide in practicability.

The utility model discloses a propylene assistant homogeneous spray forming device which comprises a drying tower, an atomization feeding pipe is fixedly arranged at the center of the top of the drying tower through an opening, an atomization spray head is installed on the outer wall of one end of the atomization feeding pipe and located on the inner wall of the top of the drying tower, and the atomization spray head is arranged on the outer wall of the other end of the atomization feeding pipe. A high-temperature air inlet pipe is fixedly arranged on the outer wall of one side of the drying tower through an opening, a hollow air gathering ring is fixedly arranged on the outer wall of one end of the high-temperature air inlet pipe, and one end of the high-temperature air inlet pipe communicates with the inner wall of the hollow air gathering ring. Materials are conveyed into the atomizing spray head through the atomizing feeding pipe to be atomized, high-temperature gas is conveyed into the hollow gas gathering ring through the high-temperature gas inlet pipe, vortex is generated through the flow guide gas spraying pipe installed in the hollow gas gathering ring, and the atomized materials generated by the atomizing spray head are driven to form vortex. High-temperature gas and atomized materials can be fully mixed, and the drying effect of the atomized materials can be improved.

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 invention relates to a manufacturing method and device of a spray-formed anticorrosive coating, and the manufacturing method specifically comprises the following steps: step 1, smelting a metal alloy block with prefabricated components into alloy liquid, and controlling the temperature of the smelted alloy liquid to be 1550-1750 DEG C; secondly, the molten alloy liquid is borne by a tundish; and thirdly, an atomizing nozzle is started, the flowing-in alloy liquid is atomized through kinetic energy of inert gas, atomized metal liquid particles are sprayed and fall on the surface of the machining object of the spraying cavity, and an anti-corrosion layer on the surface of the machining object is formed. According to the method, inert gas is adopted to atomize alloy liquid flow into fine molten drops, the fine molten drops fly under high-speed airflow and are cooled, and the fine molten drops are deposited into the blank before complete solidification, the coating dilution rate is low, coating material components are uniform, the structure is refined, macrosegregation is avoided, the oxygen content is low, and the method is greatly superior to an existing manufacturing method of an anti-corrosion coating; and the market prospect is wide.

The invention belongs to the technical field of metal-based composite materials, and relates to a preparation method of zirconium dioxide dispersion strengthened copper alloy, which comprises the following steps of: 1, smelting copper into molten copper; 2, molten copper is poured into a tundish, and nanoscale zirconium dioxide powder is placed in the sealed tundish; 3, atomizing molten copper and nanoscale zirconium dioxide powder, and spraying the atomized molten copper and nanoscale zirconium dioxide powder onto a deposition disc to form a blank; and 4, the blank is subjected to hot extrusion and cold drawing, and a finished product is prepared. According to the preparation method, liquid metal atomization and ZrO2 powder atomization are uniformly combined by adopting a spray forming method, so that a blank with a rapid solidification structure characteristic is prepared; the method has the characteristics of near net shape forming, structure refinement, short technological process, low cost, high deposition efficiency, high alloy component and the like, and solves the technical problems that oxide dispersion distribution is not uniform, dispersed phase grains are large in size and easy to agglomerate, the production process is complex, the production cost is relatively high, large blanks cannot be prepared, and the shapes and sizes of the blanks are limited.

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 invention discloses a recycling and reusing method for spray forming 7xxx series alloy powder by-products based on DED additive manufacturing and application of the recycling and reusing method, and belongs to the technical field of material preparation, and the recycling and reusing method comprises the steps of spray forming 7xxx series aluminum alloy powder by-product multi-stage screening, drying treatment, powder mixing, DED laser additive manufacturing and heat treatment. According to the method, the 7xxx series waste powder generated in the spray forming process is converted into the high-added-value powder used for additive manufacturing, the energy loss and production cost of aluminum powder preparation are reduced, environmental pollution caused by spray forming aluminum powder by-products is reduced, the tensile strength of the alloy block prepared through the method can reach 487 + / -23 MPa, the ductility reaches 5.8 + / -0.1%, and the service life of the alloy block is prolonged. The density of the alloy is at least 99.14%, and the peak hardness of the alloy after aging is at least 171 HV0.2.

The utility model provides a stable saw cutting device for spray-formed aluminum alloy, which comprises a working table, an L-shaped support frame arranged on the side wall of the working table, and a cutting knife arranged above the working table; a fixing plate is arranged on one side of the top of the workbench, a connecting plate is arranged on the other side of the top of the workbench, a second electric push rod is arranged on the side, away from the fixing plate, of the connecting plate, and a clamping plate is arranged on a telescopic shaft of the second electric push rod. The pressing assembly comprises a connecting plate arranged on the side, close to the L-shaped supporting frame, of the clamping plate or the fixing plate, a pressing electric push rod is arranged at the top of the connecting plate, and a telescopic shaft of the pressing electric push rod penetrates through the connecting plate and is provided with a pressing plate used for pressing the spray forming aluminum alloy at the cutting position. According to the cutting device, the structure is reasonable, the two cut sides of workpieces of different sizes can be pressed tightly, and the cutting stability is high.

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 invention belongs to the technical field of medical and industrial cross correlation, and particularly relates to a method for preparing an integral ceramic / metal acetabulum by adopting additive manufacturing, which comprises the following steps: S1, powder mixing: uniformly mixing alumina powder, zirconia powder and other additives; s2, performing three-dimensional modeling on the acetabulum; s3, 3D printing is conducted, specifically, an acetabulum blank is printed through a binder spray forming technology; s4, curing and sintering the acetabulum blank, namely curing, cleaning and sintering the printed acetabulum blank at high temperature, S5, smelting and pouring titanium alloy, namely putting the acetabulum and the titanium alloy into a vacuum induction furnace, and smelting the titanium alloy; and S6, post-treatment, wherein redundant materials are removed through various machining technologies. The method has the beneficial effects that the bonding strength of the ceramic acetabular lining and the metal acetabular prosthesis is enhanced, the acetabular toughness is improved, the acetabular thickness is reduced, and the acetabular diameter is increased; and the prepared novel acetabular product can effectively prolong the service life of the hip joint prosthesis and prevent a patient from suffering from joint revision surgery.

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 invention discloses an on-demand metal jet spray forming method based on forced vibration, which belongs to the technical field of 3D printing, and comprises the following steps: step 1, calculating the resonant frequency fn of a molten metal liquid column in a spray pipe; 2, determining the excitation frequency f of the forced vibration system; 3, an excitation signal with the frequency of f is input into the forced vibration system, and the forced vibration system drives the spray pipe to conduct forced vibration in the axial direction; the forced vibration of the spray pipe comprises an unstable vibration starting stage and a stable stage, and after the vibration of the spray pipe enters the stable stage, a stable metal droplet jet flow with the frequency of f is generated; and 4, after the stable metal droplet jet flow is obtained, the bottom plate is made to move in a three-dimensional mode, metal deposition is conducted through the metal droplet jet flow, and forming of the metal component is completed. The spraying frequency can reach tens of thousands of hertz, and the manufacturing efficiency of molten drop spraying type metal additive manufacturing can be greatly improved.