437 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 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 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 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 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.

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 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 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 relates to the technical field of magnesium alloys, in particular to a low-density, high-modulus and ultrahigh-strength magnesium-based composite material and a preparation method thereof.The preparation method comprises the steps that SiC reinforcement particles are pretreated; the raw materials are proportioned according to the mass percent of the components of the magnesium alloy; melting pure magnesium, sequentially adding alloy elements, uniformly stirring, cooling to a semi-solid temperature interval, adding the pretreated SiC reinforcement particles, and casting in a preheating mold to solidify, so as to obtain a magnesium-based composite material cast ingot; the cast ingot is sequentially subjected to solution treatment and extrusion forming; carrying out secondary solution treatment on the magnesium-based composite material bar subjected to extrusion forming; and performing rotary swaging deformation and intermediate annealing treatment on the magnesium-based composite material bar subjected to secondary solution treatment to obtain the ultrahigh-strength magnesium-based composite material. Therefore, the problems that in the prior art, magnesium alloy is insufficient in strength and modulus, a magnesium-based composite material easily generates casting defects and is difficult to deform at room temperature, and the performance of the material is weakened due to grain growth during high-temperature deformation are solved.

The invention discloses a method for preparing a magnesium-based composite material based on semi-solid injection molding and a product and application of the magnesium-based composite material, and belongs to the technical field of magnesium-based composite material preparation.The method comprises the following steps that a semi-solid injection molding method is adopted, a mixture of magnesium alloy matrix particles (millimeter-level) and high-entropy alloy powder is sequentially heated and stirred, and the magnesium alloy matrix particles (millimeter-level) and the high-entropy alloy powder are obtained; performing injection molding and cooling to obtain a sample; and the sample is annealed, and the magnesium-based composite material is prepared. Wherein the magnesium alloy matrix particles comprise the following components in percentage by mass: 1-9% of aluminum, 1-7% of zinc and the balance of magnesium and inevitable impurities (impurity elements are less than or equal to 0.1%); the high-entropy alloy powder is particles containing Al, Co, Cr, Fe and Ni elements, and the particle size is 0.5-50 microns. Magnesium alloy matrix particles and AlCoCrFeNi particles are mixed, and then a semi-solid injection molding technology is combined, so that the sedimentation problem of a high-density reinforced phase can be eliminated, the reinforced phase is uniformly dispersed in the material, and the comprehensive mechanical property of the composite material is further improved.

The invention discloses a pressurizing injection semi-solid magnesium alloy injection device, and relates to the technical field of injection devices, the pressurizing injection semi-solid magnesium alloy injection device comprises an injection mechanism, a pressurizing mechanism and a mold closing mechanism, the injection mechanism melts light metal alloy slurry, and the injection mechanism is communicated with a charging barrel of the pressurizing mechanism through a channel; molten light metal alloy slurry is injected into the charging barrel through the channel, the pressurizing mechanism further comprises an injection rod, the injection rod can be axially and movably arranged in the charging barrel, the injection rod injects the molten light metal alloy slurry into the mold closing mechanism to form a workpiece, a flange is arranged at the tail end of the injection mechanism, and the injection mechanism is connected with the injection mechanism. The flange is fixedly connected with the charging barrel, an injection rod is arranged on one side of the pressurizing mechanism, a punch is arranged at one end of the injection rod, and the punch is nested in the charging barrel in a sliding mode. The method has the beneficial effects that the die-casting speed is high, the filling pressurization is large, and the technical advantages of semi-solid injection molding pulping are achieved.

The invention discloses a semi-solid die-casting high-strength and high-conductivity aluminum alloy and a die-casting method thereof, and relates to the technical field of semi-solid die-casting aluminum alloys, and the aluminum alloy comprises the following components in parts by weight: 3.86 to 4.32 percent of silicon, 0.24 to 0.32 percent of magnesium, 0.35 to 0.45 percent of copper, 0.42 to 0.56 percent of manganese, 0.26 to 0.38 percent of iron, 0.07 to 0.09 percent of zinc, 0.30 to 0.40 percent of molybdenum, 0.18 to 0.22 percent of strontium, 0.05 to 010 percent of yttrium, 0.03 to 0.05 percent of scandium and the balance of aluminum. The die casting method of the aluminum alloy comprises the steps of raw material smelting, degassing, stirring vibration, die casting, heat treatment and the like. The problems that an existing aluminum alloy is poor in casting fluidity, and a semi-solid die-casting aluminum alloy with high strength and high thermal conductivity cannot be obtained are solved, the tensile strength of the semi-solid die-casting aluminum alloy obtained through the formula and the technology is not lower than 314 MPa, the yield strength is not lower than 263 MPa, the thermal conductivity is not lower than 182 W / (m.K), and the service life of the semi-solid die-casting aluminum alloy is prolonged. And the requirements and application of high-strength and high-thermal-conductivity aluminum alloy parts required in the fields of communication, automobiles, electronic appliances and the like are met.

The invention is applicable to the technical field of phase-change materials, and provides a semi-solid phase-change composite material for heat conduction of aerospace electronic devices and a preparation method thereof.The composite material is prepared from modified paraffin, modified polyethylene glycol, modified pyroxene powder, modified graphene and heat-conducting fiber. Through nanometer confinement and carbon quantum dot grafting, by adding modified polyethylene glycol, a dynamic cross-linked network is formed, high latent heat and zero leakage are achieved, by adding modified pyroxene powder, the surface hydroxyl density is increased, the interface shear strength is improved, the coating provides an additional heat conduction path, and the heat conduction coefficient of single particles is improved; the heat conductivity coefficient and saturation magnetization are improved, the magnetic field induced orientation arrangement efficiency is improved, graphene / fiber three-dimensional ordered distribution is achieved through magnetic field-shearing cooperation, the heat conductivity of the material is remarkably improved, the phase change energy storage capacity of the phase material is combined with the high heat conductivity of the solid-phase filler, and efficient heat dissipation is achieved.

The invention discloses a waste ring-pull can extrusion forming recovery system and a processing technology, and belongs to the field of ring-pull can recovery processing, the waste ring-pull can extrusion forming recovery system comprises a paint removing structure, a stock bin, a shredding machine, a hammer breaking machine, a cake pressing machine, a box type preheating chain plate machine, an extrusion forming machine and a conveying system; the process of paint removal, physical decomposition (shredding and hammering), compaction (cake pressing), preheating softening (semi-solid state) and high-pressure forming (aluminum rod extrusion) is adopted, complete melting is avoided in the whole process, low-temperature and low-energy-consumption forming is achieved by means of high plasticity and thixotropy of aluminum in the semi-solid state (solid-liquid coexistence), an existing casting method is replaced by the process of machining waste ring-pull cans into aluminum rods, and the production cost is reduced. The problems of high working temperature and large energy consumption and metal loss in the process of recycling the aluminum ring-pull cans at present are solved.

The invention belongs to the technical field of metal casting, and relates to a double-injection collaborative casting system and method. The dual-injection collaborative casting system comprises a liquid slurry preparation unit, a liquid slurry injection unit and a semi-solid slurry injection unit. The liquid slurry preparation unit is used for preparing liquid slurry; the liquid slurry injection unit is used for injecting liquid slurry into the mold; the semi-solid slurry injection unit is used for providing a low-vacuum inert gas environment for the liquid slurry, and is used for carrying out ultrasonic temperature adjustment treatment and eccentric rotation on the liquid slurry in the low-vacuum inert gas environment to form semi-solid slurry, and then injecting the semi-solid slurry into a mold; the liquid slurry can fill a main body part of a cavity in the mold, the semi-solid slurry can fill a far-end edge part of the cavity in the mold, and then the liquid slurry and the semi-solid slurry are jointly subjected to mold filling casting to prepare a metal casting. According to the double-injection collaborative casting system, double-injection casting of the metal casting can be carried out, and the quality of the manufactured metal casting is high.

The invention belongs to the technical field of preparation and application of non-ferrous metal composite materials, and particularly relates to a ceramic particle premixing reinforced magnesium-based composite material semi-solid die casting method and system. A preparation step of prefabricated composite particles is added in front of a feed port of the semi-solid hydraulic casting pulping machine, and the prefabricated composite particles are obtained by heating, melting, premixing, cooling and crushing interface-optimized ceramic particles and magnesium-based alloy particles. The ceramic particles are subjected to interface optimization treatment and further premixed with the magnesium-based alloy through a specific premixing process, the ceramic particles and the magnesium-based alloy cooperate with each other to prepare prefabricated composite particles, and a high-quality metallurgical bonding interface is formed under controllable conditions; the prefabricated composite particles are used as feeding materials of a semi-solid die-casting process, the raw material basis of semi-solid die-casting is thoroughly changed, the uniformity and excellent interface of a final composite material product are ensured, and therefore the mechanical property of the composite material is remarkably improved.

The utility model discloses a kind of magnesium alloy semi-solid die-casting forming equipment, including slurry supply device, die-casting device and the forming die with forming cavity, slurry is supplied to pressure equipment after being supplied by slurry supply device, and the required magnesium alloy product is formed by being pressed into forming cavity by die-casting device, feature is that slurry supply device includes slurry preparation mechanism and ration supply mechanism, slurry preparation mechanism is sealingly connected by ration supply mechanism between die-casting device, slurry preparation mechanism is used to prepare magnesium alloy slurry of semi-solid from solid raw material, and the magnesium alloy slurry of semi-solid prepared by slurry preparation mechanism is ration supplied to die-casting device by ration supply mechanism. Advantage is simple structure, and it is convenient to obtain the magnesium alloy product with more excellent mechanical property.

The application belongs to the technical field of metal materials, and particularly relates to a kind of multi-element micro-alloyed Al-Zn series magnesium alloy for semi-solid injection and a preparation method thereof, which comprises the following steps: raw materials and pretreatment; vacuum induction melting and purification are carried out on the raw materials to obtain a melt containing multi-element micro-alloyed Al-Zn series; the melt is rapidly solidified and powdered to obtain petal-shaped magnesium alloy granules; the magnesium alloy granules are subjected to semi-solid injection molding to obtain a magnesium alloy molded part; the magnesium alloy molded part is subjected to special gradient heat treatment to obtain a magnesium alloy heat-treated part; and finishing treatment is carried out on the surface of the magnesium alloy heat-treated part. In addition, the application also prepares a multi-element micro-alloyed Al-Zn series magnesium alloy by using the above preparation method. The application realizes the synergistic improvement of strength-plasticity-corrosion resistance by constructing a unique grain boundary dispersed micro-tube core-shell structure and combining semi-solid injection molding and special heat treatment process.

The invention discloses a ternary composite phase reinforced Mg-Al series magnesium alloy-based composite material obtained in situ by adding nano silicon nitride, which comprises the following raw material components in percentage by weight: 2-10% of nano silicon nitride particles and the balance of Mg-Al series magnesium alloy particles, and the sum of the weight percentages of the components is 100%. A complex-structure casting prepared from the material by using a semi-solid injection molding process has high elastic modulus, high rigidity, high temperature resistance and certain elongation. The invention further discloses a method for preparing the casting with the complex structure through the semi-solid injection molding technology. The casting prepared through the method has the advantages of being high in elasticity modulus, high in rigidity, resistant to high temperature and certain in elongation.