185 results about "Semi solid" patented technology

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.

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 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.

This invention relates to the field of metal die casting technology, and more specifically, to an ultrasonic-assisted vacuum die casting apparatus and method for non-ferrous metals. The apparatus includes a forming mold, a casting system, a vacuum system, and a vibration demolding system. The forming mold has a cavity. The casting system is connected to the forming mold and is used to inject liquid metal into the cavity. The vacuum system is connected to the forming mold and is used to evacuate the cavity. The vibration demolding system is connected to the forming mold and is used for ultrasonic vibration and demolding. Evacuating the cavity allows the molten metal to fill it more easily, reducing porosity and increasing density. The vibration demolding system vibrates the semi-solid metal material cooled to a certain point within the cavity, breaking up grains and venting air, thereby producing die-cast parts with clear interfaces, high density, and high strength and quality. The vibration also automatically cuts off the small gate point of the casting and solidified material.

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.

Method for manufacturing a component (11) wherein an aluminum-based alloy (20) is provided and converted into a semi-solid state and the component (11) is manufactured from it by a semi-solid process, characterized in that the alloy (20) contains less than 1.3 wt.% iron and at most 0.2 wt.% silicon.

The application belongs to the field of magnesium alloy semi-solid injection molding, and specifically discloses a high-quality and high-efficiency magnesium alloy wheel hub semi-solid injection molding method. The method is implemented by using a semi-solid forming device with a material dispersion chamber, a grain spheroidization chamber, an injection chamber, a double-screw stirring shaft and a plunger pusher. The method comprises the following steps: adding raw material particles into the material dispersion chamber; controlling the temperature and the rotating speed of the stirring shaft in the material dispersion chamber, so that the raw material particles form premixed slurry in the material dispersion chamber; controlling the temperature and the rotating speed of the stirring shaft in the grain spheroidization chamber, so as to promote the spheroidization of the grains in the premixed slurry and form semi-solid composite slurry; opening the one-way valve on the plunger pusher, and transferring the slurry into the injection chamber; closing the one-way valve and controlling the stirring shaft to push the plunger pusher to move, so as to inject the slurry into the mold cavity. The application can solve the problems of high purity and mechanical property requirements and low production efficiency in the current wheel hub forming process.

The invention discloses a semi-solid die-casting method for a thin-wall aluminum-magnesium alloy for an automobile, and relates to the technical field of semi-solid die-casting, and the method comprises the following steps: S1, adding the prepared aluminum-magnesium alloy into a heat preservation cylinder, starting a rotating motor to stir and shear the aluminum-magnesium alloy, meanwhile, cooperating with an electric heating plate, keeping the aluminum-magnesium alloy in a semi-solid temperature interval, preparing semi-solid slurry, and S2, the movable mold and the positioning mold are tightly closed through an electric control hydraulic rod, and meanwhile one end of a drainage channel is sealed. The quantitative injection die-casting mechanism is scientific and reasonable in structure and safe and convenient to use, the quantitative injection die-casting mechanism is arranged, a sealing cover plate is pushed to ascend through an electric control ejector rod, sealing of a discharging channel is relieved, and the sealing effect is good. The semi-solid aluminum magnesium alloy can conveniently flow into the quantitative injection barrel through the discharging channel and the feeding pipe, and when the liquid level in the quantitative injection barrel reaches the preset height, the liquid level pressing barrel and the supporting ejector rod are hydraulically pushed to descend and make contact with the touch switch, and the electric control ejector rod is controlled in time.

The invention discloses a rare earth magnesium alloy semi-solid recovery method, which relates to the technical field of magnesium alloy recovery, and comprises four steps of reclaimed material preparation, vacuum hot pressing, semi-solid heating and thixotropic extrusion. By adopting vacuum hot pressing and semi-solid thixotropic extrusion technologies, the problems of serious oxidation and combustion of the rare earth magnesium alloy in traditional liquid recovery are avoided, and environmental pollution and resource waste are avoided; through vacuum hot pressing, high-temperature oxidation of the recycled material in the hot pressing process is avoided while the density of the vacuum hot pressing blank is ensured; by adopting semi-solid thixotropic extrusion, liquid phase flow in the forming process is promoted, an original interface between cuttings is eliminated, new metallurgical bonding is formed again, and the interface bonding force between the cuttings is greatly improved.

This invention belongs to the field of magnesium-lithium alloy material preparation technology, specifically relating to an ultralight magnesium-lithium alloy suitable for semi-solid die casting of thin-walled parts and its preparation method. This invention proposes an economical and effective magnesium-lithium alloy suitable for the semi-solid die casting process of ultra-thin-walled parts by adjusting the alloy composition and process method. The semi-solid die casting ultralight magnesium-lithium alloy for thin-walled parts described in this invention is composed of the following components by mass percentage: Li: 4.0-7.0%, Al: 2.5-5.5%, Ca: 0-1.0%, Zn: 0-1.0%, Mn: 0-0.3%, RE: 0-1.0%, with the balance being Mg and unavoidable impurity elements; RE is one or more of Ce, Y, Nd, Sm, and Er, and the sum of the contents of all elements except magnesium is <13%. The method of this invention can realize the low-temperature semi-solid molding and manufacturing of ultra-thin wall parts of 0.3~0.8mm, with a semi-solid die casting yield of over 98%; it has good molding performance, high efficiency, good product rigidity, and excellent performance; and it is easy to realize mass industrial production.

The invention relates to the technical field of preparation of aluminum alloy forgings, in particular to a preparation method of a high-performance 6-series aluminum alloy forgings based on semi-solid pretreatment and fog cooling-oil cooling composite quenching, which comprises the following steps: step 1, smelting; step 2, cooling the melt, carrying out ultrasonic treatment to a semi-solid temperature, and standing for solidification; thirdly, the cast ingot is subjected to heat preservation treatment; fourthly, the cast ingot subjected to heat preservation treatment is subjected to hot die forging; fifthly, the forge piece is subjected to composite quenching, water mist is adopted for first-stage rapid cooling, and then oil cooling is adopted for second-stage slow cooling; and sixthly, the cooled forge piece is subjected to aging treatment. And the precipitation behavior of second-phase particles is regulated and controlled by adopting a process of fog cooling first and then oil cooling, the residual stress in the forge piece is reduced, the alloy strength is improved, and the synergistic effect of fine grain strengthening and solid solution strengthening is fully exerted.

The application discloses a kind of semi-solid aluminum alloy die-casting composite feeding device, it is related to the field of die-casting machine feeding device, including feeding device, injection chamber and push rod, the injection chamber outside is equipped with fixed shell, and fixed shell inner wall is equipped with storage cavity.The application can continuously stir semi-solid molten metal throughout the process by the cooperation of storage cavity and rotatable lifting stirring blade structure, effectively suppresses the stratification and specific gravity segregation problem of metal raw materials due to the difference in component proportion, keeps the internal composition of molten metal uniform and consistent at all times, avoids the drawbacks of traditional mechanical watch layer material taking, stabilizes the internal structure of casting, significantly improves the overall forming quality of product, the temperature control of heat supplement pipe and heat preservation layer outside storage cavity, the heat insulation shell outside feeding pipe and the high-temperature steam waste heat reuse structure of storage cavity are matched, realize the closed conveying of molten metal and whole process heat preservation, substantially reduce the heat loss in the process of material conveying and storage, reduce the heat supplement energy consumption.

The utility model discloses a semi-solid injection molding mold with a cooling mechanism, and belongs to the technical field of semi-solid injection molding molds. The mold mainly comprises an upper mold body and a lower mold body, the lower mold body comprises a bottom plate and a bottom mold body, the bottom mold body is fixedly installed on the bottom plate, a liquid inlet pipe and a liquid outlet pipe are installed on the two sides of the bottom mold body in a threaded mode respectively, a cooling cavity is formed in the bottom mold body, and a lower forming cavity for finished product forming is formed in the top face of the bottom mold body; a cooling cavity is formed in the enclosure frame, a cooling groove is formed in the enclosure frame and communicates with the cooling cavity, a first heat conduction assembly is arranged in the cooling cavity, a second heat conduction assembly is arranged in the cooling groove, and by arranging the double heat conduction assemblies and the layered cooling structure, the cooling effect is greatly improved; the defects that the cooling speed of semi-solid metal is inconsistent due to too high mold temperature or non-uniform cooling are effectively avoided, shrinkage cavities, deformation and the like are reduced, the product size precision and the forming quality are improved, meanwhile, the forming period is shortened, and the production efficiency is improved.

The application discloses a kind of metal polymer composite for 3D printing and preparation method thereof, the composite is prepared by compounding semi-solid metal alloy modified by coupling agent with polymer material.The preparation method is: modified semi-solid metal alloy, polymer material, functional additive are mixed, and are processed into shape to be prepared;Or modified semi-solid metal alloy, polymer material, functional additive are mixed, material for 3D printing, and are solidified into shape again.The composite of the application is used at temperature of 20-230 DEG C, viscosity is 1-10 5 Pa·S, resistivity is 10 ‑6 ~10 6 Ω·cm;Preparation method is simple, raw material cost is low, non-toxic, post-processing is simple, so that material is applied to 3D printing when extruding evenly, speed is controllable, warpage is low, and the prepared conductive polymer material is easy to store, small in density, stable in conductive effect, compared with traditional conductive printing material, and conductive performance is obviously improved.

The application relates to the alloy preparation technical field, and discloses a nano-titanium reinforced magnesium-based alloy, a preparation method thereof and mechanical equipment. The disclosed preparation method of the nano-titanium reinforced magnesium-based alloy comprises the following steps: uniformly dispersing nano-titanium particles in paraffin to obtain a paraffin preform; heat-treating the paraffin preform to remove part of the paraffin to obtain a dewaxing preform; the mass ratio of the nano-titanium particles to the paraffin in the dewaxing preform is 1:0.3-0.8; adding the dewaxing preform into a semi-solid magnesium alloy melt to uniformly stir and mix, so that the paraffin attached to the surface of the nano-titanium particles completely escapes from the melt to obtain a mixed melt; pouring casting after the temperature of the mixed melt is increased by 50-80 DEG C to obtain the nano-titanium reinforced magnesium-based alloy. The disclosed nano-titanium reinforced magnesium-based alloy is prepared by using the above preparation method. The disclosed mechanical equipment is prepared by using the above magnesium-based alloy. The preparation method provided by the application can uniformly disperse the nano-titanium in the magnesium-based alloy, and obtain a composite magnesium-based alloy material with good mechanical properties.

The application relates to the technical field of molds, and particularly discloses a hot runner structure of a semi-solid magnesium alloy die-casting mold, which comprises a main runner structure and at least one sub-flow nozzle connected with the main runner structure, a sub-flow cavity is formed in the sub-flow nozzle, a valve needle is arranged in the sub-flow cavity, an outer wall of the valve needle is sleeved with a spiral sleeve, an outer wall of the spiral sleeve is provided with spiral guide protrusions, and intervals for fluid passing are formed between the spiral guide protrusions and an inner wall of the sub-flow cavity; and the spiral sleeve is connected with a conductive mechanism for axial displacement. The hot runner structure of the application considers both flow path optimization and real-time state monitoring, so that the stability of a semi-solid magnesium alloy die-casting process and forming quality are improved.

A kind of heating method of high-precision aluminum alloy pipe blank near semi-solid extrusion forming, the heating before extrusion of aluminum alloy blank includes two heating of furnace heating and out-of-oven heating, wherein furnace heating is preheated to aluminum alloy blank, and its temperature is controlled below solidus temperature;Wherein the final heating of aluminum alloy blank is completed by adopting temperature cycle of heating and cooling to out-of-oven heating, the temperature of aluminum alloy blank is accurately controlled, and the temperature difference between inside and outside is controlled, so that the overall temperature is controlled to be 5-10 ℃ above solidus, so that a small amount of liquid phase organization is formed between the grain boundary of aluminum alloy blank, and it is in near semi-solid state;When extruding in near semi-solid state, the deformation resistance can be greatly reduced, and the composition segregation caused by liquid phase composition aggregation when extruding in semi-solid state is avoided, so that the extrusion forming quality of high-precision aluminum alloy pipe blank is greatly improved, the qualified rate of high-precision aluminum alloy pipe blank is improved, and the production cost of high-precision aluminum alloy pipe is effectively controlled.

The application discloses a kind of ground well valve barrel cylindrical valve body chip rotary extrusion friction semi-solid additive manufacturing device and process, device includes U-shaped frame, crossbeam, first nut motor composite mechanism, second nut motor composite mechanism, T-shaped disc type double rotor motor type male die, first nut motor composite mechanism, second nut motor composite mechanism etc.;When working, first put chip into mould cavity, by the "friction heat effect" generated by T-shaped disc type double rotor motor type male die "rotary extrusion friction" and valve body lower die "reverse rotation friction", the forming of first layer semi-solid spherulitic material valve body barrel wall is realized, then repeatedly additive iteration is realized to form valve body barrel wall, after turning T-shaped disc type double rotor motor type male die, ground well valve barrel cylindrical valve body parts are formed by "vibration, rotary extrusion friction" mode.This device is compact in structure, process is simple, and part material grain is small and uniform, and the organization is dense, high in strength, with good internal organization performance.

The utility model discloses a kind of magnesium-based composite material forming equipment, it is related to composite material preparation technical field, including material pipe, main feeding mechanism, auxiliary feeding mechanism, heating assembly and main push assembly;Material pipe front end is communicated with the forming cavity of die casting mould, and the length direction of material pipe is spaced and provided with at least two feeding positions;Main feeding mechanism is fed into magnesium alloy matrix to material pipe rear end;Auxiliary feeding mechanism is movably arranged and is fed into the inner cavity of material pipe with carbon fiber powder in any one feeding position;Main push assembly is used to push magnesium alloy matrix forward, so that magnesium alloy matrix is melted to form semi-solid slurry under the heating action of heating assembly, and mixed with carbon fiber powder to form semi-solid composite slurry, then semi-solid composite slurry is pushed forward to the forming cavity and is die casting formed.This scheme can control the interface reaction degree of carbon fiber and magnesium alloy matrix, effectively avoid the generation of harmful interface, so as to obtain ideal interface bonding effect.

This application provides a semi-solid state lithium battery, including: an electrolyte solution; a separator disposed in the electrolyte solution; and a positive electrode plate and a negative electrode plate that are respectively disposed on two sides of the separator, where the positive electrode plate includes a positive current collector and a positive active layer disposed on the positive current collector, the positive active layer is doped with 0.1 wt%~5 wt% of oxide electrolyte, and D50 of the oxide electrolyte is 0.05 µm~1.2 µm; and the negative electrode plate includes a negative current collector and a negative active layer disposed on the negative current collector. In this application, the positive active layer is doped with the oxide electrolyte, to reduce a lowest electrolyte solution retention coefficient of the battery and reduce an expansion rate of the battery after high-temperature cycle 1000cls, and improve performance such as a capacity retention rate of the battery after high-temperature cycle 1000cls, a capacity retention rate of the battery at -20°C, a quantity of pulse discharge times of the battery at -20°C, a rate discharge capacity of the battery at 2 C / 0.2 C, and a temperature of a thermal shock test chamber for the battery.

Embodiments described herein relate generally to semi-solid slurries made with a mechanically compacted powder, and more particularly methods for preparing semi-solid slurries with a higher solid ratio (e.g., greater than 50% by volume of the slurry) which enables more stable production of batteries with high energy density. Described herein is a method for fabricating a semi-solid electrode and an electrode material. The method involves blending an active material with a conductive material to form an intermediate material, which is then compacted to form a compacted material. This compacted material is subsequently mixed with an electrolyte to form a semi-solid slurry. In some embodiments, the compacted material includes a plurality of agglomerates formed from the electrochemically active material. The method further includes applying the semi-solid slurry onto a current collector material to form a semi-solid electrode.

The application discloses a kind of flat type semi-solid continuous thixotropic extrusion sleeve forming methods, belong to metal semi-solid forming technical field.It includes the following steps (1) preheating;(2) initial station blank heating;(3) station movement;(4) die closing;(5) die opening;(6) demolding;(7) station repeats;The application is through the cooperation of upper rectangular plate, lower rectangular plate, male die, female die, translation mechanism, upper driving mechanism and lower driving mechanism, realize the thixotropic forming of the embryo in the multiple die holes on female die, extrusion process is stable controllable, semi-solid billet has no spatter risk;Gas inclusions in forming environment are less, can effectively avoid billet oxidation, finally obtain the sleeve parts of organization compact, excellent mechanical properties, improve sleeve forming efficiency and quality, semi-solid extrusion forming belongs to near net shape process, later cutting processing amount reduces by more than 60%, material utilization rate can reach more than 90%, significantly reduce raw material loss.

This invention relates to the field of metal material plastic processing technology, and discloses a stretching forming process for an aluminum back shell of a display. The process includes: coating the surface of an aluminum plate with a semi-solid hybrid gel lubricant conversion fluid, drying it to form a non-glassy semi-solid lubricant film; stamping a convex bulge and placing it in a pre-forming mold, using the shear modulus of the film and the elastic blank holder force of the mold for initial stretching; subsequently performing a secondary stretching to tighten the sidewalls, during which the phase change heat absorption of moisture in the film in the deformation heat accumulation zone is used to suppress overheating of the aluminum material; finally, assembly is completed by CNC machining, warm water cleaning, and homogeneous blind hole riveting. This invention achieves integrated forming of an all-metal back shell through the synergy of a semi-solid lubricant medium and a multi-stage stretching mold, eliminating heterogeneous interfaces and welding heat-affected zones, solving deep stretching cracks and surface orange peel defects, improving structural strength and anodized appearance consistency, and reducing manufacturing costs.

The utility model belongs to the technical field of semi-solid aluminum alloy processing, and provides a stirring degassing device for preparing semi-solid aluminum alloy, which comprises a lifting frame which is in transmission connection with a lifting piece; the transmission assembly comprises a gear box fixedly connected to the lifting frame, a planetary gear transmission mechanism is arranged in the gear box, a driving part is in transmission connection between the input end of the planetary gear transmission mechanism and the gear box, and the output end of the planetary gear transmission mechanism is in transmission connection with a plurality of stirring parts; and the gas powder conveying assembly comprises gas powder conveying equipment and a degassing shaft arranged in the planetary gear transmission mechanism, the bottom of the degassing shaft communicates with a degassing head, the degassing head is located in the semi-solid aluminum alloy melt, and the gas powder conveying equipment communicates with the degassing head through the degassing shaft. The semi-solid aluminum alloy melt degassing device can be used for efficiently degassing a semi-solid aluminum alloy melt, purifying the melt and homogenizing components.

The present disclosure provides a base fixing assembly for semi-solid batteries and an ultrasonic welding device. The base fixing assembly for semi-solid batteries comprises a rack, a bottom clamping assembly and a side clamping assembly. The bottom clamping assembly is arranged at the bottom of the rack to fix the bottom clamping assembly to the rack. A positioning cavity is formed in the middle of the bottom clamping assembly. The side clamping assembly is arranged on one side of the bottom clamping assembly. The side of the side clamping assembly facing the positioning cavity is provided with a fixing groove. The fixing groove and the positioning cavity together form a mounting area. The mounting area is used to accommodate the semi-solid battery, so that the bottom of the semi-solid battery is fixed in the positioning cavity, and the side of the semi-solid battery is fixed in the fixing groove. The device adds the bottom clamping assembly and the side clamping assembly, which better ensures the reliable stability of the welding operation of the semi-solid battery in a high-frequency mechanical vibration environment, thereby improving the welding strength.

The invention discloses a method for simultaneously refining and modifying primary and eutectic Mg2Si phases in hypereutectic Al-Mg2Si alloy, and relates to the field of metal material processing and preparation. The preparation method comprises the following steps: pouring an overheated melt into a graphite snake-shaped channel, and refining a primary Mg2Si phase by utilizing the chilling, self-stirring and heterogeneous nucleation effects of the snake-shaped channel, so as to obtain the semi-solid metal slurry with the solid phase fraction of 0.1-12.9%. And then the slurry is subjected to rheological, thixotropic or gravity casting forming, in the solidification process, a Sr alterant added in advance is used for alteration of a eutectic structure, and mutual poisoning weakening between a primary phase refiner and the eutectic alterant is avoided. And finally, the Al-Mg2Si alloy with the primary Mg2Si particles fully refined and the eutectic Mg2Si phase fully deteriorated is obtained, and the mechanical property, the heat-conducting property and the wear resistance of the alloy are further improved.

This utility model relates to a web-aligning device for BOPP film production, aiming to solve the technical problems of current web-aligning rollers driven by threaded rods, which not only have long response times and are prone to hysteresis errors at high speeds, but also cause local stretching of the film due to rigid impacts, resulting in wrinkles or holes. The device includes: a base with unwinding and take-up rollers mounted on both sides of its surface for unwinding and take-up of the BOPP film; and a web-aligning mechanism located on the base between the unwinding and take-up rollers. This utility model uses a monitoring component to capture the lateral deviation of the film in real time. The electromagnetic coil current can be adjusted in microseconds, causing a rapid change in the viscosity of the magnetorheological fluid in the corresponding cavity. This allows for stepless switching of the magnetorheological fluid from liquid to semi-solid state, causing the web-aligning roller to undergo adaptive deformation. When the deviation is small, the viscosity is finely adjusted to form a flexible corrective force; when the deviation is large, rigidity is increased to ensure web-aligning efficiency. Compared to traditional threaded rod mechanical transmission, this device shortens the hysteresis time and is suitable for high-speed film production scenarios.

Embodiments described herein relate to blade assemblies for shaping of semi-solid electrodes. In some aspects, a blade assembly can include a doctor blade and a mounting frame attached to the doctor blade. The mounting frame includes a blade attachment coupled to a first portion of the doctor blade, a first flexure element, and a second flexure element coupled to the blade attachment. The mounting frame further includes a linear output connector coupled to the first flexure element and the second flexure element. The linear output connector imparts a tensile force to the first flexure element when at a first elevation and a tensile force to the second flexure element when at a second elevation, the second elevation lower than the first elevation. The mounting frame further includes a camshaft that imparts vertical motion to the linear output connector and an actuator that imparts rotational motion to the camshaft.