510 results about "Semi solid" patented technology

The invention discloses a semi-solid injection-molded high-strength corrosion-resistant magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 7%-8.5% of Al, 1%-4% of Zn, 0.1%-0.8% of RE, 0.02%-0.5% of Ca and the balance of Mg and inevitable impurities. Through component design and process optimization, the liquidus temperature of the alloy is lower than 610 DEG C, and the alloy is insensitive to temperature in the solid fraction interval of 20-40% and is suitable for semi-solid injection molding; the Al content is controlled to form a net-shaped Mg17Al12 phase as a corrosion barrier, and Zn and RE / Ca cooperate to achieve heat treatment strengthening and oxidation film densification. The problem that strength and corrosion resistance of a traditional magnesium alloy are difficult to consider at the same time is solved, and the magnesium alloy is suitable for high-performance light-weight components of automobiles, aerospace and the like.

The invention relates to an aluminum-based composite material, in particular to a preparation method of an in-situ micro-nano Al2O3 particle reinforced aluminum-based composite material. The preparation method comprises the following steps: carrying out ball-milling pre-dispersion on silica powder, calcined kaolin and aluminum powder according to a specified ratio, stirring an Al-Si alloy melt at a semi-solid temperature, adding ball-milling mixed powder, heating to a temperature above an Al-Si alloy liquidus, dispersing reactant powder by using a blade-tray integrated stirring device, heating, carrying out heat preservation, carrying out heat preservation, and carrying out vacuum drying to obtain the aluminum-silicon alloy. And reacting to generate in-situ micro-nano Al2O3 particles, cooling, supplementing alloy elements, refining, and pouring to obtain the in-situ micro-nano Al2O3 particle reinforced composite material. According to the blade-tray integrated stirring device, mechanical stirring and the rolling and impacting effects of the ceramic balls are combined, the problem of one-time dispersion of micro-nano reactant powder is effectively solved, meanwhile, passivation of edges and corners of micron particles is achieved, and the comprehensive performance of in-situ particle reinforced aluminum matrix composites is improved.

The invention relates to the technical field of powder metallurgy, in particular to a preparation process of a graphene composite profile prepared from brass waste, which comprises the following steps: selecting the brass waste containing different components according to the application scene of the graphene composite profile; the brass waste materials are smashed into brass block-shaped smashed materials; the preparation method comprises the following steps: adding 0.001-10% by mass of graphene into the brass block-shaped crushed aggregates, and carrying out wet ball milling to form a first-size mixed powder liquid; carrying out semi-solid rotary shearing and stirring processing on the mixture; and continuously extruding the graphene-brass mixed base material to form a graphene composite profile blank, and carrying out post-process to obtain the graphene composite profile capable of overcoming brass spot, line and surface defects. According to the invention, a powder metallurgy process is combined with a medium-temperature continuous extrusion process, so that the brass waste is efficiently and directly recycled without pollution, and the physical properties and chemical properties such as hardness, strength, conductivity, corrosion resistance and high-temperature creep resistance of the composite material are greatly improved. The invention further correspondingly discloses the graphene composite profile and application.

The invention discloses a zirconium-based metal organic framework (Zr-MOF) composite semi-solid electrolyte material prepared based on an electrostatic spinning technology and application of the zirconium-based metal organic framework (Zr-MOF) composite semi-solid electrolyte material. The material is composed of a three-dimensional polymer fiber network, surface-coated Zr-MOF nanoparticles and an organic liquid electrolyte solution, a polymer matrix provides mechanical support, and Zr-MOF micropores and a liquid electrolyte form a multistage ion transmission channel. The preparation method comprises the processes of electrostatic spinning forming, in-situ Zr-MOF synthesis and gradient pressure electrolyte infiltration. The ionic conductivity of the material at 25 DEG C reaches 1.2 * 10 S / cm, the lithium ion transference number is 0.65, the capacity retention ratio after 500 cycles is greater than or equal to 90%, and the material is suitable for high-energy-density lithium ion batteries and flexible energy storage devices through acupuncture safety tests.

The invention provides an MEMS electrochemical gas sensor and a processing method thereof. The sensor is mainly composed of a breathable substrate structure, a counter electrode, a semi-solid electrolyte layer and a working electrode, the counter electrode, the semi-solid electrolyte layer and the working electrode form a sandwich structure, the thickness of the semi-solid electrolyte layer is 1-30 microns, and the semi-solid electrolyte layer is mainly of a film structure formed by baking a semi-solid electrolyte solution. According to the MEMS electrochemical gas sensor, the semi-solid electrolyte layer is mainly processed based on a semi-solid electrolyte material by adopting processes such as spraying or spin-coating, drying and curing, and the MEMS electrochemical gas sensor is designed and prepared by combining an MEMS process, so that the size of the sensor structure can be 1 mm, the miniaturized and zero-power-consumption work is realized, the gas sensor has a good response signal, and the gas sensor has a good application prospect. The load resistance is in a kiloohm level, and the output current is in a [mu] A level. The sensor can be used for monitoring reducing gases such as carbon monoxide, ethanol, formaldehyde and the like.

The invention belongs to the technical field of material processing, and discloses a magnesium alloy casting semi-solid injection molding method and application, and the method comprises the following steps: checking and adjusting a semi-solid injection machine, a casting mold and other equipment to be in a normal state, and placing magnesium alloy particles in a designated area of a hopper; putting a long nozzle of the semi-solid injection platform into the center of a mold sprue; setting the temperature of each section of a mold temperature controller, a charging barrel and a nozzle; preserving heat for a period of time after the temperature of the charging barrel reaches a set value, so that the temperature of materials in the charging barrel is uniform; setting the injection rate, the cooling time, the material return distance and the melt pressure of the semi-solid injection machine; and after a release agent is quantitatively sprayed to the mold, a semi-solid injection program is started, and a casting is obtained. The AS41B magnesium alloy particles with good heat resistance are adopted as the raw material, the semi-solid injection molding method is combined, a melting furnace is not needed, only heating to the semi-solid state is needed, the melt temperature is low, energy is saved, the service life of a mold is prolonged, protective gas is not needed, and the manufactured casting is good in mechanical property and high in heat resistance.

Embodiments described herein relate generally to semi-solid electrodes, and methods of producing the same. In some embodiments, a method of forming a semi-solid electrode can include mixing an active material, a conductive material, and an electrolyte solvent to produce a semi-solid material. The electrolyte solvent is free of electrolyte salt. The method further includes dispensing the semi-solid material onto a current collector and wetting the semi-solid material with an electrolyte solution to form the semi-solid electrode. In some embodiments, the wetting can be via spraying. In some embodiments, the electrolyte salt can have a concentration in the electrolyte solution of at least about 1 M, at least about 2 M, or at least about 3 M. In some embodiments, the solvent can include ethyl methyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), gamma-Butyrolactone (GBL), or any combination thereof.

The invention relates to the technical field of aluminum alloy casting, and discloses a rare earth alloying modified 3102 aluminum alloy semi-solid casting method which comprises the following steps: S1, preparing ingredients: firstly preparing a raw material of a 3102 aluminum alloy and then preparing a rare earth element, S2, smelting: sequentially putting the raw material of the 3102 aluminum alloy into smelting equipment according to a sequence, S3, adding the rare earth element, and S4, casting. After the 3102 aluminum alloy raw material is smelted, S4, preparing semi-solid slurry, namely, cooling and stirring a smelted solution through stirring equipment, and adding a grain refiner while stirring until the smelted solution is formed into the semi-solid slurry, S5, performing die casting or injection molding, injecting the semi-solid slurry into a die casting mold of die casting equipment, and S6, cooling and demolding. And S7, heat treatment is conducted, specifically, the demolded casting is subjected to solution treatment, and a protective atmosphere is added. The yield strength and tensile strength of the alloy are improved through mechanisms such as solid solution strengthening, copper and aluminum can form an intermetallic compound to achieve dispersion strengthening, hardness increasing and wear resistance improving, silicon is beneficial for reducing melt viscosity and improving fluidity, and the alloy body performance is further improved through mixing of multiple materials, and the alloy is suitable for being used in various scenes.

The invention discloses a semi-solid ultrasonic rolling synchronous auxiliary electric arc additive manufacturing device and method, and the device comprises an ultrasonic rolling device, and further comprises an electric arc welding gun device, an automatic wire feeding device, a manipulator, a control system device, a protective gas cylinder and a clamp device. When semi-solid ultrasonic rolling synchronous auxiliary electric arc additive manufacturing is carried out, the electric arc welding gun is fixed to one mechanical arm, the synchronous ultrasonic rolling device is fixed to the other mechanical arm, and the two mechanical arms are controlled by the control system device to move synchronously. The invention provides a structure regulation and control method of applying ultrasound and rolling composite to a semi-solid area of an electric arc additive manufacturing near-molten pool, and utilizes stirring and cavitation effects of the ultrasound and a deformation-induced recovery recrystallization effect to promote escape of bubbles, effective welding of pores and full crushing and refining of dendritic crystals, so that the mechanical property of the electric arc additive manufacturing near-molten pool is improved. And finally, regulation and control of the compact equiaxed fine grain structure in electric arc additive manufacturing are achieved.

The invention provides a rare earth aluminum alloy and a preparation method thereof, and relates to the technical field of metal materials, and the preparation method comprises the following steps: step 1) carrying out smelting treatment on alloy raw materials, and obtaining an alloy melt after melting; wherein the alloy raw materials comprise rare earth elements; (2) the alloy melt is stirred at the set temperature, and semi-solid alloy slurry is obtained; and (3) the semi-solid alloy slurry is subjected to aftertreatment, and the rare earth aluminum alloy is obtained. Through stirring treatment, on one hand, thick and large columnar crystals in alloy melt can be crushed to form fine crystal grains; and on the other hand, heterogeneous nucleation can be promoted, the structure is further refined, components of the alloy are evenly distributed, and therefore the mechanical property of the alloy is promoted to be improved.

The invention relates to the technical field of metal materials and processing thereof, and discloses a rare earth metal reinforced 6063 aluminum alloy semi-solid casting process which comprises the following steps: S1, preparing 0.6-0.7% of magnesium; 0.5%-0.7% of silicon; 0.05%-0.1% of manganese; 0.1%-0.3% of copper; 0.05%-0.15% of titanium; 0.05% to 0.15% of zirconium; 0.1%-0.3% of rare earth elements; s2, the high-purity aluminum ingot is placed in a vacuum melting furnace to be heated until the high-purity aluminum ingot is completely melted; s3, cooling the melt to a liquid-solid two-phase region; s4, the melt subjected to semi-solid treatment is injected into a metal mold with the dynamic temperature control function; s5, the casting is subjected to staged dynamic heat treatment; and S6, leftover materials generated in the casting process are classified and screened. And the precipitation form and distribution of a strengthening phase are optimized through variable-temperature solid solution and two-stage aging processes in dynamic heat treatment, and the toughness of the material is improved.

The invention relates to an aluminum-silicon alloy and a die-casting process thereof. The die-casting process of the aluminum-silicon alloy comprises the following steps: melting alloy raw materials, degassing and refining, carrying out semi-solid pulping, adding a refiner in the semi-solid pulping process, stirring, reducing the temperature of a semi-solid alloy melt, and continuously stirring, so as to realize primary refinement and modification of primary crystal grains and broken dendrites formed in the semi-solid slurry; a semi-solid alloy melt is obtained; and chilling, solidifying and forming the semi-solid alloy melt, and quenching to obtain the aluminum-silicon alloy casting. The invention further provides the aluminum-silicon alloy prepared through the die-casting technology. The problem that an existing refiner cannot meet the good refining effect and the good modification effect at the same time is solved, and the problems that an existing aluminum-silicon alloy die casting is thick in structure and poor in tensile property are further solved.

The invention provides a magnesium-lithium alloy and a semi-solid thixotropic die-casting preparation method of the magnesium-lithium alloy. The magnesium-lithium alloy comprises the following components in percentage by mass: 5-14% of Li, 2-9% of Al, 1-3% of Zn, 1-5% of Ca, 0.3-3% of RE and the balance of Mg. The semi-solid thixotropic die-casting preparation method of the magnesium-lithium alloy comprises the steps that S1, burdening and drying are conducted according to the preset mass percent, vacuum melting is conducted in the protective gas atmosphere, and molten metal is obtained and cast into a magnesium-lithium alloy cast ingot; performing extrusion deformation on the magnesium-lithium alloy ingot, and cutting to prepare millimeter-scale long rod-shaped magnesium-lithium alloy particles; s2, the magnesium-lithium alloy particles obtained in the S1 are heated to the solidus temperature Ts or above, electromagnetic stirring is conducted, and semi-solid slurry is prepared; and S3, the semi-solid slurry is injected into a die-casting die, a die cavity is filled with the slurry by applying pressure, die opening and part taking are conducted after pressure maintaining, and the ultra-light high-strength semi-solid thixotropic die-casting magnesium-lithium alloy casting is obtained.

The invention discloses a semi-solid thixotropic injection casting method for forming a ribbed thin-wall magnesium alloy new energy automobile shell part, and relates to a semi-solid thixotropic injection casting method for forming magnesium alloy. The invention aims to solve the technical problem that the existing semi-solid thixotropic injection-cast AZ91D magnesium alloy is difficult to meet higher requirements of components on comprehensive mechanical properties. According to the feeding barrel in the semi-solid thixotropic injection casting forming machine, five sections of variable-pitch screw rods are divided into five sections along the axis from the feeding direction to the discharging direction, and the screw pitches of the five sections are sequentially reduced; the invention further provides a T6 heat treatment method for semi-solid thixotropic injection casting of the AZ91D magnesium alloy, the solid solution time in T6 heat treatment is shortened by a long time compared with other alloys, the cost is saved, and the production efficiency is improved; and the combination of parameters such as slurry temperature, mold temperature, injection casting speed and injection casting pressure is optimized to synergistically realize grain refinement, second phase dispersion precipitation and tissue density improvement, so that the mechanical property is remarkably enhanced.

The present invention discloses a pole piece and a preparation method thereof and a semi-solid battery, which sequentially include a current collector, an active material layer coated on the surface of the current collector, and a solid electrolyte layer coated on the surface of the active material layer, wherein a microstructure is provided on the side of the active material layer away from the current collector, and the depth of the microstructure is greater than the thickness of the solid electrolyte layer. The positive and negative pole pieces are etched, marked or punched by laser, and microstructure processing is performed on the surface of the pole piece to achieve the expansion of the reaction area of ​​the electrode surface, improve the fast charging capability, and inhibit the generation of lithium dendrites. Most importantly, a solid electrolyte layer is coated on the surface of the pole piece, which can effectively prevent corrosion of the pole piece surface, protect the microstructure of the pole piece surface, improve the battery life and capacity retention rate at high rates, and extend the cycle life of the battery.

Embodiments described herein generally relate to semi-solid suspensions, and more particularly to systems and methods for preparing semi-solid suspensions for use as electrodes in electrochemical devices such as, for example batteries. In some embodiments, a method for preparing a semi-solid electrode includes combining a quantity of an active material with a quantity of an electrolyte to form an intermediate material. The intermediate material is then combined with a conductive additive to form an electrode material. The electrode material is mixed to form a suspension having a mixing index of at least about 0.80 and is then formed into a semi-solid electrode.

The invention discloses a high-toughness corrosion-resistant semi-solid injection molding magnesium alloy and a preparation method thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises the following chemical components in percentage by weight: 8.6 to 11 percent of aluminum, 0.5 to 1 percent of zinc, 0.05 to 0.4 percent of manganese, 0.05 to 0.2 percent of calcium, 0.6 to 2 percent of rare earth element RE and the balance of magnesium and inevitable impurities. The preparation method of the alloy comprises the following steps: (1) adding raw materials according to the component proportion, smelting into magnesium alloy melt, pouring into a mold, and molding to obtain a magnesium alloy ingot; (2) cutting the cast ingot into magnesium alloy semi-solid blank particles; (3) performing injection molding to obtain a molded part; (4) solid solution heat treatment; and (5) performing two-stage aging heat treatment. The magnesium alloy has high toughness and corrosion resistance, and is suitable for semi-solid injection molding. The forming process can achieve near-net forming of complex components, and castings are few in defect, compact in structure and wide in application prospect.

The invention relates to the field of industrial data acquisition control, and provides a semi-solid magnesium alloy injection casting temperature feedback control method and equipment, and the method comprises the steps: monitoring and obtaining sensor temperature data at a plurality of moments in a semi-solid magnesium alloy injection casting process; acquiring a plurality of detection time periods and predicted temperature data thereof; analyzing the difference and variation trend between the sensor temperature data and the predicted temperature data in each detection time period, and quantifying the temperature deviation factor of each detection time period; based on the correlation of the change trend between the sensor temperature data and the predicted temperature data in each detection time period, the change of the correlation under the time sequence change of the detection time period is analyzed, and the temperature deviation accuracy of each detection time period is obtained; and correcting the sensor temperature data at each moment to obtain melt temperature data at each moment, and performing feedback control. The invention aims to solve the problem that the overall temperature feedback control effect is influenced by local temperature change in the magnesium alloy injection casting process.

The invention belongs to the technical field of integrated die-casting forming, and relates to a semi-solid double-alloy integrated die-casting forming method and system.The method comprises the steps that two kinds of semi-solid alloy slurry are prepared, specifically, at least two kinds of metal are mixed and then heated to be melted; after inert gas is filled to clean residual oxygen in the resistance furnace, refining and degassing are carried out, so that the molten alloy liquid is synchronously subjected to eccentric rotation and indirect ultrasonic treatment for the same time in the inert gas closed environment to generate vortexes and grow solid-phase particles, and meanwhile, the high-pressure inert gas closed environment is vacuumized; corresponding semi-solid alloy slurry is obtained; cooling the two kinds of semi-solid alloy slurry, and then respectively transferring the two kinds of semi-solid alloy slurry into corresponding injection chambers in an inert atmosphere; and the two kinds of semi-solid alloy slurry are sequentially or simultaneously injected into the corresponding areas in the die-casting die, the two kinds of semi-solid alloy slurry are converged, and a metallurgical-mechanical composite bonding interface is formed at the joint of the two kinds of semi-solid alloy slurry. According to the invention, the effects of uniform material structure and high injection efficiency of the integrated injection casting can be realized.

Embodiments described herein relate generally to systems and methods for continuously and / or semi-continuously manufacturing semi-solid electrodes and batteries including semi-solid electrodes. The methods include disposing a portion of a current collector material into a gap between a first arc-shaped member and a second arc-shaped member, disposed along an outside edge of a drum, and moving the first arc-shaped member with respect to the second arc-shaped member to at least partially close the gap, causing the current collector material to frictionally engage with a portion of both arc-shaped members. The method further includes dispensing a semi-solid electrode material onto a surface of the first arc-shaped member and the second arc-shaped member. Subsequently, the second arc-shaped member is moved with respect to the first one, re-establishing the gap and resulting in the formation of two discrete portions of electrode material on the surface of the current collector material.

The invention discloses a thixotropic injection casting forming and heat treatment combined strengthening method for a complex ultrathin lightweight magnesium alloy material, and relates to a forming and heat treatment combined method for a magnesium alloy material. The invention aims to solve the technical problem that the mechanical property of the existing complex ultrathin light-weight magnesium alloy material is poor. According to the method, AZ91D magnesium alloy particles serve as raw materials, the density is improved through semi-solid thixotropic injection casting parameter regulation and heat treatment strengthening, defects are strictly controlled, the technology of low-temperature short-time solid solution + room-temperature water cooling + short-time aging + air cooling is adopted, and the tensile strength, the yield strength and the ductility after the heat treatment technology are obviously improved; the heat treatment process is an important guiding direction for thixotropic injection casting heat dissipation pieces, supporting pieces and structural pieces in the future. The thixotropic injection casting technology and the special heat treatment technology are excellent combinations for forming the complex ultrathin lightweight magnesium alloy shell, the combination can further improve the mechanical property of a structural part, and the application potential of the alloy is broken through.

The invention discloses a high-thermal-conductivity Mg-Zn magnesium alloy suitable for rheoforming and a preparation and processing method of the high-thermal-conductivity Mg-Zn magnesium alloy. The alloy comprises the following components in percentage by weight: 1-8% of Zn, 0.5-5% of Cu, 0.2-2% of Sn, 0.2-1% of Sc and the balance of Mg and inevitable impurities. The preparation and processing method comprises the following steps: (1) preparing raw materials according to the composition of the alloy components, and smelting by adopting a medium-frequency induction furnace and taking mixed gas of tetrafluoroethane and argon as a protective atmosphere; (2) mechanical stirring and ultrasonic synergistic stirring are combined to form a uniform melt; (3) preparing semi-solid slurry with a solid phase ratio of 35-50%; (4) forming; (5) cooling and opening the mold; (6) the obtained rheoforming blank is heated to 340-430 DEG C, heat preservation is conducted for 2-12 h, and after heat preservation is finished, quenching is conducted immediately, and cooling is conducted to the room temperature; (7) pre-aging; and (8) aging. By reasonably designing alloy components and optimizing rheoforming parameters, the defects of shrinkage, hot cracking and segregation of a conventional cast Mg-Zn alloy are overcome, and meanwhile, high heat conductivity and mechanical properties are guaranteed.

The invention relates to a cast-rolling casting nozzle with an electric-magnetic coupling oscillation effect. Relates to a cast-rolling casting nozzle with an electromagnetic oscillation effect, which is matched with a horizontal double-roller cast-rolling machine in the field of aluminum alloy die casting. The method is used for solving the inevitable internal macrosegregation defect of the high-alloy-content aluminum alloy cast-rolled product. The device comprises an L-shaped electrode pair 1; a side seal 2; an excitation device 3; a guide plate 4; a cooling water pipe (inlet / outlet) 5; a copper enameled wire (excitation) 6; a countersunk self-tapping screw 7; a casting nozzle upper plate 8; a rhombic shunting block 9; a nozzle lower plate 10; and a casting nozzle bottom plate 11. In the casting and rolling process, an oscillating electric field and a steady magnetic field are introduced, electromagnetic coupling force is generated at the outlet end of a casting nozzle, the electromagnetic force effectively stirs a semi-solid aluminum alloy melt, and therefore the purposes that alloy is evenly distributed, and segregation defects are reduced or even eliminated are achieved. The method is used in 4-series, 6-series and 7-series aluminum alloys, and the effect is obvious.

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

The invention relates to the technical field of aluminum alloys, in particular to a semi-solid aluminum alloy suitable for friction stir welding and a preparation method and a machining method of the semi-solid aluminum alloy. The semi-solid aluminum alloy suitable for friction stir welding comprises, by weight, 6.5%-8.0% of Si, 1.0%-1.5% of Cu, 0.2%-0.8% of Mg, 0.01%-0.05% of Sr, 0.01%-0.1% of RE and the balance Al and inevitable impurities, and the total content of the inevitable impurities is smaller than or equal to 0.2%. The semi-solid aluminum alloy can be formed through a semi-solid rheo-die-casting process and can be welded through a friction stir welding process, the mechanical property of the semi-solid aluminum alloy is excellent, and the mechanical property of a welded joint obtained through welding is excellent.

The invention discloses a semi-solid plastic forming method for 6xxx aluminum alloy, and belongs to the technical field of semi-solid forming. The method comprises the steps that an original aluminum alloy ingot is smelted to obtain liquid aluminum alloy, and pouring is started to prepare semi-solid slurry when the temperature is 20-50 DEG C higher than a liquidus; transferring the semi-solid slurry into a preheated mold on an extruder for extrusion casting to obtain a semi-solid cylindrical blank; and the semi-solid blank is preheated and subjected to heat preservation, the preheated semi-solid blank is transferred into a preheated extrusion container, aluminum alloy profile extrusion is conducted, and finally the high-strength and high-plasticity aluminum alloy profile is obtained. According to the semi-solid rheological squeeze casting technology, grains and a second phase are refined, a semi-solid cast ingot which is more uniform in structure and better in compactness is obtained, and follow-up profile extrusion of the semi-solid cast ingot is facilitated; and finally, the aluminum alloy profile with higher compactness and better mechanical property is obtained through profile extrusion.

The utility model relates to the technical field of bioreactors, and discloses a semi-solid fermentation bioreactor, which comprises a tank body with a feed port and a discharge port, a rotary guide cylinder is arranged in the tank body, the rotary guide cylinder can rotate around the axis of the rotary guide cylinder, and the feed port is communicated with the discharge port. The inner wall and / or the outer wall of the rotary guide cylinder are / is provided with a spiral band extending along the length direction of the rotary guide cylinder, the rotary guide cylinder is arranged in the tank body, and the inner wall and / or the outer wall of the rotary guide cylinder are / is provided with the spiral band extending along the length direction of the rotary guide cylinder. The spiral belt can forcibly drive reaction materials in the tank body to ascend or descend when the rotary guide cylinder rotates around the axis of the rotary guide cylinder, so that the reaction materials in the tank body are fully mixed, and the purpose of strengthening mass transfer and heat transfer of semi-solid fermentation materials is achieved.

The invention discloses an aluminum alloy semi-solid die-casting forming method and system, relates to the technical field of metal processing, and aims at solving the problems that in an existing semi-solid die-casting technology, the slurry solid fraction fluctuation is large, the structure uniformity is poor, and die-casting control is not in place. The method comprises the following steps: preparing an aluminum alloy raw material, carrying out refining modification treatment on the aluminum alloy raw material, and carrying out dynamic stage temperature control stirring to complete preparation treatment of semi-solid slurry, so as to obtain semi-solid aluminum alloy slurry, carrying out preheating treatment on a die-casting die, transferring and injecting the semi-solid aluminum alloy slurry into a pressure chamber of the die-casting die, and constructing an automatic die-casting program. Full-period die-casting control is conducted on the semi-solid aluminum alloy slurry in the pressure chamber, solution treatment and aging heat treatment are conducted on the aluminum alloy casting subjected to full-period die-casting control, the respective treatment processes are supervised and intervened, and then the final aluminum alloy casting forming part is obtained, so that the compactness and mechanical property of the casting are effectively improved, and the casting quality is improved. And high-quality casting of castings is achieved.

The invention discloses a semi-solid metal slurry preparation device based on vibration and collision, and relates to the technical field of semi-solid metal processing. The preparation device comprises a fixed bracket, a crucible, a vibration unit, a stirring unit, a lifting mechanism and a temperature control unit. When preparing the semi-solid metal slurry, the invention puts an alloy melt into the crucible, adjusts the stirring unit according to the viscosity of different slurries and actual needs, descends the lifting mechanism, inserts the vibration unit, the stirring unit and the temperature control unit into the alloy melt, starts the stirring unit and the vibration unit, stirs and vibrates the alloy slurry, the vibration unit can make the distribution of spherical particles more uniform during stirring, eliminates bubbles in the alloy slurry, and ensures the quality of the prepared semi-solid metal slurry, the temperature control unit releases cooling liquid or gas to cool the alloy melt, detects the temperature of the alloy slurry by the temperature control unit, and stops working after reaching the expected temperature.

The invention belongs to the technical field of layered structure composite material preparation, and discloses a method for preparing a large-size laminated material through semi-solid delayed solidification forming, aluminum and titanium are used as raw materials, semi-solid delayed solidification die-casting forming equipment is utilized, and the large-size laminated material is prepared through surface treatment, titanium plate presetting, charging barrel and die preheating, charging, feeding, die-casting forming and delayed solidification annealing. And preparing the aluminum-titanium laminated composite material. According to the method for preparing the large-size laminated material through semi-solid delayed solidification forming, aiming at the technical current situations that a large-size aluminum-titanium laminated composite material is difficult to prepare, defects are easily introduced into a heterogeneous interface and the interface bonding strength is low, the preparation problem of the large-size aluminum-titanium laminated composite material in the prior art is solved; an obvious interface bonding layer is formed between the titanium layer and the aluminum layer of the prepared aluminum-titanium laminated composite material, defects such as pores and cracks do not exist, the heterogeneous interface bonding is good, the bonding strength is high, and the aluminum-titanium laminated composite material has obvious technical advantages and process advancement.