85results about How to "Advanced technology" patented technology

The utility model relates to the technical field of vibration screening equipment, in particular to a square tube cross beam structure with a trapezoid reinforcing plate and vibration screening equipment. The cross beam connecting plates are welded to the two ends of the square tube and used for being connected with a screen frame or an external component; the cross beam trapezoidal plates are symmetrically attached to the side walls of the square tube, and the lower bottoms of the cross beam trapezoidal plates extend outwards to form supporting surfaces; the square plate is fixed at the upper end of the trapezoidal plate of the cross beam and is used for dispersing load; mounting holes are formed in the upper portion of the square plate and used for being connected with a screen bottom beam. The scheme has the advantages of light weight, high fatigue resistance and process adaptability.

The utility model belongs to the technical field of machining and forming of automobile parts, and particularly relates to oil injection and dispensing equipment which comprises an oil injection mechanism, a dispensing mechanism, a cleaning mechanism and a four-way mechanism and is used for conveying lubricating oil to a preset position of a device to be machined. The conveying device is used for conveying sealant liquid to a preset position of a to-be-processed device; the cleaning machine is used for outputting a cleaning agent for cleaning oil stains and adhesive residues; an oil injection channel, a glue injection channel, a cleaning channel and an output channel are arranged in the four-way mechanism, the oil injection channel, the glue injection channel and the cleaning channel are respectively connected with the output ends of the oil injection mechanism, the glue dispensing mechanism and the cleaning mechanism one by one, and an outlet of the output channel faces a device to be processed. Wherein the output end of the oil injection channel and the output end of the glue injection channel are communicated with the output channel, the number of the output ends of the cleaning channels is two, and the output ends of the two sets of cleaning channels are communicated with the oil injection channel and the glue injection channel respectively.

The invention discloses a photoetching mask process window analysis method and system, and belongs to the technical field of photoetching processes, and the method comprises the following steps: collecting exposure process parameters, photoetching pattern parameters, window evaluation parameters and auxiliary parameters to construct an exposure analysis vector; selecting historical exposure analysis vectors to form a historical vector set, and constructing a sensitivity matrix; a real-time feature vector is constructed through online detection, and the current process state is judged in combination with a sensitivity matrix so as to identify window abnormity; once the window is identified to be abnormal, through multi-exposure condition simulation, constructing an index simulation value corresponding to a process window index for each group of exposure parameters, and screening an optimal exposure regulation and control group; converting the optimal exposure regulation and control group into an exposure execution instruction, and issuing the exposure execution instruction to execute exposure operation; and after the exposure operation is completed, deviation comparison verification is carried out, and a case sample is constructed to iteratively update the sensitivity matrix, so that the process suitability and the prediction precision are improved, and the automatic production requirement of a photoetching mask preparation production line is effectively met.

The application discloses a preparation method of zolmitriptan, relates to the technical field of drug synthesis, and comprises the following steps: adding compound 1 and reagent 1 into solvent 1 to perform a first reaction to obtain compound 2; adding the compound 2, reagent 2 and reagent 3 into solvent 2 to perform a second reaction to obtain compound 3 and the like. Compared with the prior art, the application provides a novel synthetic route for preparing zolmitriptan, the route uses L-4-bromophenylalanine as a starting material, and new synthetic steps are adopted, such as using reagent 5, such as a t-butyl alcohol metal salt and sodium hydride, to construct the oxazolidinone structure in zolmitriptan and using a coupling reaction to construct the indole ring in zolmitriptan, so that the yield of the obtained target product is significantly improved, the use of high-toxicity and high-risk reagents in the existing synthetic route is effectively avoided, and a mild, efficient, green and environmentally-friendly synthetic route for preparing zolmitriptan is provided.

This utility model discloses a powder coating device for stainless steel welding wire, including a processing box with an inlet and an outlet at both ends. Two movable plates are connected to the processing box via an adjustment mechanism. The adjustment mechanism includes a fixed plate, a drive assembly, a bidirectional threaded rod, and a limiting rod. The fixed plate is fixedly installed inside the processing box, the limiting rod is fixedly connected between the fixed plates, the bidirectional threaded rod is rotatably connected to the fixed plate, the drive assembly is connected to the bidirectional threaded rod, and the bidirectional threaded rod is threadedly connected to the movable plates. Two powder coating brushes are engaged at one end of the two movable plates via a locking mechanism, and several powder spraying heads are installed at the other end of the movable plates. Each powder spraying head is connected to a powder spraying assembly. This utility model allows adjustment of the distance between the powder coating brushes and the spraying heads, solving the problem of uneven powder coating in traditional devices when dealing with welding wires of different diameters, and improving the uniformity and quality of powder coating.

The application belongs to the technical field of semiconductor lithography, and discloses a mask absorption layer structure with low three-dimensional effect, which comprises a quartz substrate, a bottom anti-reflection layer, an absorption layer main body and a top anti-reflection layer. The bottom anti-reflection layer is deposited on the surface of the quartz substrate. The absorption layer main body is deposited on the side of the bottom anti-reflection layer away from the quartz substrate. The top anti-reflection layer is deposited on the side of the absorption layer main body away from the bottom anti-reflection layer. The absorption layer main body forms a patterned groove structure required for lithography in the XY plane. The absorption layer main body is provided with a partition modulation structure matched with the diffraction characteristics of the patterned groove structure in the Z-axis direction perpendicular to the XY plane, which can adjust the light field distribution of incident light and the phase of transmitted light, eliminate multiple reflections and phase distortion in the groove, reduce the adverse effects of mask three-dimensional effect, improve the lithography focusing precision and pattern size control ability, and meet the lithography application requirements of advanced process nodes.

The invention provides a multi-component thin film evaporation film thickness monitoring and adjusting device and method and application, the multi-component thin film evaporation film thickness monitoring and adjusting device comprises a conveying module used for conveying a substrate so as to deposit a film layer on the moving substrate through a first evaporation source and a second evaporation source, the conveying module is provided with a position sensing module, and the position sensing module is used for sensing the position of the film layer on the moving substrate through the first evaporation source and the second evaporation source; a trigger signal is generated when the substrate enters the set area; the first film thickness monitoring module is used for acquiring the deposition speed of the first evaporation source and the thickness of a film layer deposited on the substrate; the second film thickness monitoring module is used for acquiring a reflection spectrum of the second evaporation source in a set area; and the control module is used for obtaining the film thickness according to the reflection spectrum of the second evaporation source through an inversion algorithm, and independently feeding back and controlling the real-time evaporation working condition. The thickness of materials with different evaporation rates is subjected to differential parallel monitoring, a closed-loop feedback system is formed, the film thickness monitoring accuracy is improved, and long-time operation of monitoring work is guaranteed.

The invention discloses a three-dimensional packaging chip system with a built-in interconnection test function and a detection method thereof, and the system comprises a packaging semiconductor main body which is internally provided with a plurality of wiring layers, a testability design (DFT) circuit which is integrated in a chip, and an internal multi-channel selection switch network which is controlled by the DFT circuit and is arranged on each wiring layer. And at least two detection pins / pads which are arranged outside the package and have a small number and increased pin spacing. According to the method, the DFT circuit is used for controlling switching of the switching network, different internal interconnection paths are multiplexed to the detection point in a time division mode for electrical measurement, and accurate positioning of fault nodes is achieved by analyzing multiple sets of measurement results. According to the method, the problem that the needle card is difficult to test due to warping of high-density packaging is effectively solved, hierarchical and nodal accurate diagnosis of internal interconnection faults of three-dimensional packaging is realized for the first time, the test cost and complexity are remarkably reduced, and a hardware basis is provided for online function repair.

The invention discloses an electronic power soft starter, and relates to the technical field of power equipment soft start, the electronic power soft starter comprises a silicon controlled rectifier heat dissipation system, a silicon controlled rectifier trigger system and a soft start control system, the silicon controlled rectifier heat dissipation system adopts a double heat dissipation mode of oil immersion and water cooling, and three-phase six silicon controlled rectifier elements are immersed in insulating oil; the bottom of the oil box is placed in the water box; according to the silicon controlled rectifier trigger system, two silicon controlled rectifiers in each phase are connected in anti-parallel and are connected with relay coils through buttons, and contacts of relays are connected with control electrodes of the silicon controlled rectifiers. According to the electronic type electric power soft starter, a contactless spark design is adopted, sparks generated by a traditional mechanical contact type starter are effectively avoided, and the safety production level is improved; and meanwhile, the short-circuit instantaneous breaking protection circuit breaker is adopted, so that the safety protection performance of the equipment is further enhanced. The heat dissipation mode is innovative, oil immersion and water cooling are combined, the heat dissipation cost is reduced, and hot water can be recycled.

This utility model relates to a silicon carbide crystal boat, comprising two end plates arranged opposite each other, and a grooved bar disposed between the end plates. Each end plate is composed of region A, region B, and region C. Region A has two evenly spaced circular holes. A foolproof hole is located at the center of the lower edge of region C of one end plate. Regions B and C each have three circular holes. A handle is also provided on the outer side of region B of the end plate. The diameter of the circular holes is 20-35 mm. This silicon carbide crystal boat is a complex structural component formed integrally and then perforated. Through innovative end plate partitioning and optimized circular hole topology, thermal stress reduction is achieved, providing a core guarantee for the long lifespan and low defect rate operation of the silicon carbide crystal boat in high-temperature semiconductor processes.

This invention relates to a copolymer and a viscosity reducer comprising the copolymer, and more specifically, to a copolymer, a viscosity reducer comprising the copolymer, a positive electrode slurry composition, a positive electrode, and a secondary battery. The copolymer is capable of preparing a positive electrode slurry composition with low viscosity and excellent dispersibility, and is capable of preparing a positive electrode with excellent adhesion between the positive electrode active material and the current collector.

This invention discloses a method, system, and storage medium for multivariate time-series feature extraction and grade prediction in flotation processes. The method includes the following steps: Step S1: Raw data input and encoding; encoding and structured input of time-series data composed of various process variables; Step S2: Extracting dynamic features; Step S3: Condition-guided encoding modeling; Step S4: Enhancing the saliency of key variables and important time segments; employing a multi-head attention mechanism to match key-value pairs generated from target-guided query vectors and multi-scale features; Step S5: Outputting a prediction module; performing feature fusion and nonlinear mapping on the attention mechanism output to output the predicted concentrate grade and recovery rate for future times. The system and storage medium are both based on the above method. This invention has advantages such as higher intelligence, better controllability, and improved prediction accuracy and model adaptability for key indicators in the flotation process.

The utility model discloses a kind of laser devices convenient to patch package, including support, laser chip, metal pipe cap, the support includes concave table, metallized pad and annular step part, metal heat sink is fixedly embedded in the concave table, the laser chip is fixed on the metal heat sink upper surface by eutectic solder, the metal pipe cap is the tubular structure of one end opening one end airtight, the edge of the opening end of the metal pipe cap is sealed and fixed with the annular step part, the problems such as high cost, low production efficiency, poor fault tolerance, heavy weight of traditional TO packaging equipment are solved by structural innovation, under the premise of guaranteeing the performance of laser device, production economy and process adaptability are significantly improved.

The application discloses a method for accurately analyzing high-temperature change of niobium compound in steel, which comprises the following steps: (1) fixing a metallographic sample on a clamp; (2) polishing and cleaning the surface of the metallographic sample; (3) observing the metallographic sample by using a metallographic microscope, finding characteristic niobium compound, marking the outer edge of the characteristic niobium compound by using a microhardness tester, and then accurately measuring the size of the marked niobium compound under a scanning electron microscope and accurately determining the composition of the marked niobium compound by using an energy spectrometer; (4) heat treating the metallographic sample to obtain a heat-treated sample; (5) removing the surface oxide of the heat-treated sample and then corroding the surface of the heat-treated sample; and (6) observing the change of the marked niobium compound after heat treatment under a scanning electron microscope and determining the composition of the marked niobium compound by using an energy spectrometer. The method has the characteristics of low detection cost, rapidness, simplicity, accuracy and the like.

The present application relates to a SiC Schottky diode with wide process window and a manufacturing method thereof, wherein the SiC Schottky diode comprises a first conductive type semiconductor substrate, a first conductive type semiconductor epitaxial layer, a patterned silicon dioxide layer and a first metal layer; a first surface of the first conductive type semiconductor epitaxial layer is provided with a second conductive type main junction, a projection of the patterned silicon dioxide layer on the first conductive type semiconductor substrate is located within a projection of the second conductive type main junction on the first conductive type semiconductor substrate; and a projection of the first metal layer on the first conductive type semiconductor epitaxial layer overlaps with a projection of the patterned silicon dioxide layer on the first conductive type semiconductor epitaxial layer. The present application utilizes an angular dielectric layer structure to realize the lifting of the terminal metal, and can improve the overall reverse withstand voltage and reliability of the device.

The invention provides an automatic spectrograph debugging device and method, and the device comprises a standard light source module which is used for providing a reference light signal with a known characteristic spectral line for a to-be-debugged spectrograph; the grating adjusting mechanism comprises an electric rotary displacement table and a linear displacement table, the electric rotary displacement table is used for driving a grating in the spectrometer to rotate around a shaft so as to adjust wavelength accuracy, and the linear displacement table is used for translating the grating in the light path direction so as to adjust spectral resolution; the spectrum acquisition module is used for acquiring spectrum data processed by the spectrograph in real time; a reference spectrum is excited through a multi-spectral-line standard light source, the peak position and the full width at half maximum are accurately extracted by adopting spline interpolation, an electric rotary displacement table and a linear displacement table are driven to perform two-dimensional closed-loop adjustment on a grating, and the wavelength-pixel non-linear mapping correction and convergence criterion are combined, so that the resolution of the grating is improved. And full-automatic high-precision calibration of wavelength accuracy and spectral resolution is realized.

The utility model discloses an anode baking furnace top heat preservation device with heat recovery function, including baking furnace body and the heat preservation device body of being located baking furnace body top, still include heat recovery device, heat recovery device installs heat preservation device body's top, heat recovery device includes heat collection board subassembly, heat collection board subassembly adopts high -efficient heat -conducting metal material to make, its shape is arc structure to adapt the top piece of heat preservation device top top, is equipped with a plurality of microchannels in the inside, lower surface coats high absorption rate black coating, and microchannel fills heat conducting medium. The utility model discloses through heat recovery device, realizes the efficient collection and reuse of baking furnace top heat loss, effectively promotes energy utilization, and reduces production cost.

The present application relates to the technical field of metallographic analysis detection, and specifically discloses a display method for accurately distinguishing the multiphase structure of W780X hot-rolled plate, which comprises wire cutting sampling, hot inlaying, grinding, polishing, and etching; the polished sample is soaked in a sodium thiosulfate solution for 10-200 seconds, and then the surface is wiped with a hydrochloric acid alcohol cotton ball to remove the surface corrosion products, washed with alcohol, and dried; metallographic microscope observation can clearly show the morphology, size and distribution state of ferrite, pearlite and martensite. Compared with the prior art, the etchant used in the present application is a solution prepared from 8-15 g of sodium thiosulfate and 77-90 ml of water, and after etching, the three kinds of structures can be clearly shown, the cost is low, it is safe and non-toxic, and it is convenient to prepare; the morphology and distribution state of ferrite, pearlite and martensite in the metallographic structure of the W780X hot-rolled plate can be clearly and completely shown; and the method has the characteristics of low detection cost, rapidness, simplicity and accuracy.

This invention relates to a machine tool loading and unloading control system and method, belonging to the field of machine tool automation control technology. The system includes a group of machine tools, multiple industrial robots with dual-station end effectors, a main control unit, an information acquisition unit, a loading and unloading buffer system, and a positioning mechanism. Through an intelligent scheduling algorithm based on the dual principles of "first-in, first-out" and "process matching," robots are only scheduled to use their dual-station end effectors for collaborative loading and unloading when all machine tools within the process matching group have completed processing, maximizing hardware efficiency. Simultaneously, the information acquisition unit automatically binds workpiece identity and full-process processing data at loading and unloading nodes, achieving precise traceability. This invention effectively solves problems such as difficulty in integrating heterogeneous equipment, low scheduling efficiency, and information traceability gaps, significantly improving production cycle time, equipment utilization, and quality control levels.

This invention discloses a process for in-situ decarbonization of oily sludge using autocatalytic gasification of sintering circulating flue gas to produce hydrogen-rich gas, which is then reinjected into the sintering machine. The core innovation of this process lies in the fact that it eliminates the need for additional catalysts and carbon-fixing agents. It directly utilizes the metal oxides contained in the ash of the oily sludge as an autocatalyst and the calcium-based components as a carbon-fixing agent. Using sintering circulating flue gas as the gasification medium, under reaction conditions of 500-900℃, the autocatalytic gasification of the oily sludge and in-situ carbonization of CO2 are simultaneously achieved, thereby producing high-purity hydrogen-rich gas. This hydrogen-rich gas is then reinjected into the sintering machine, replacing fossil fuels in sintering production. Simultaneously, the iron- and calcium-rich residue generated after the reaction is recycled back into the ore and used as sintering raw material in the sintering process, realizing the resource recovery of valuable elements. This invention effectively achieves waste resource utilization, process decarbonization, and energy cascade utilization, significantly reducing the total carbon emissions and production operating costs of the sintering process.

The application provides a kind of hard rock type uranium ore bioheap leaching method, comprising: constructing the bioheap leaching device comprising leaching column, acidification liquid storage tank, biological bacteria liquid storage tank, acidification liquid circulating pump, leaching liquid circulating pump;In the acidification liquid storage tank, configure acidification liquid, pump into the leaching column containing uranium ore by circulating pump, set the acidification liquid rising velocity in leaching column and acidification reaction time, carry out closed circuit leaching on uranium ore;In the biological bacteria liquid storage tank, configure leaching bacteria liquid based on the adsorption tail liquid of Jin Yuan Uranium Industry Hydrometallurgy Plant, pump into the leaching column that has completed acidification pretreatment by circulating pump, set the leaching liquid rising velocity and leaching time, carry out closed circuit leaching on the uranium ore after acidification.The application significantly reduces acid consumption and cost through the synergistic optimization of two-stage parameters, shortens the leaching period, and provides a reliable technical solution for the development of low-grade hard rock uranium ore.

The application discloses a kind of orthogonal three-dimensional weave analysis methods based on CT three-dimensional reconstruction and threshold fitting, it is related to weave technical field, comprising: while following the physical constraint of X-ray imaging, generate three-dimensional voxel model using latent diffusion priori;Reserve orthogonal three-dimensional weave main body to generate purified three-dimensional voxel model;Get calibrated three-dimensional voxel model;Separate weave main stress area and generate each analysis area three-dimensional voxel model;Set continuous gray threshold interval and with fixed step length scan each analysis area three-dimensional voxel model, form threshold-volume fraction data set;According to threshold-volume fraction data set, construct threshold proportion trend curve, get fitting deviation index;According to fitting deviation index, generate orthogonal three-dimensional weave internal infiltration quality evaluation result.The application improves the imaging quality and authenticity of orthogonal three-dimensional weave microstructure.

The application discloses a kind of continuous flow photocatalytic decarboxylation preparation biological hydrocarbon method, belong to the technical field of biofuel preparation.The method includes the following steps: high fatty acid compound, hydrogen atom transfer catalyst and acridine photocatalyst are dissolved in organic solvent, and mixed solution is obtained;The mixed solution is passed into circulating continuous flow light reactor, and photocatalytic decarboxylation reaction is carried out at room temperature for 12-24 hours, and reaction liquid is obtained;Reaction liquid is separated by reduced pressure distillation, and the biological hydrocarbon compound after decarboxylation is obtained.The application uses continuous flow light reactor to strengthen mass transfer and heat transfer efficiency, solves the problem that light penetration depth is limited in traditional batch photoreactor, and reaction is not uniform;Metal-free catalytic system is used, and the use of noble metal and potential residual risk is avoided.The method has mild reaction condition, higher product yield, good atom economy, and for unsaturated high fatty acid, olefin configuration can be maintained before and after decarboxylation, and has good industrial application prospect.

The invention discloses a MicroLED micro display device and a preparation method thereof. The preparation method comprises the following steps: providing a driving substrate and a plurality of first epitaxial wafers emitting first color light; patterning the first epitaxial wafer to form a plurality of first epitaxial partitions which are distributed at intervals and have epitaxial structures; the first epitaxial wafer is cut to form a plurality of first epitaxial sub-wafers with preset shapes, and each first epitaxial sub-wafer is provided with a plurality of first epitaxial partitions; bonding the plurality of first epitaxial sub-wafers on a driving substrate in sequence to form a first bonding wafer; and processing and forming a plurality of first light-emitting units which are provided with epitaxial structures and are separated from one another on the first bonding sheet. The wafer reconstruction technology is adopted, a large-size driving substrate does not need to be cut, small-size monochromatic epitaxial wafers are processed into epitaxial sub-wafers, then the epitaxial sub-wafers are bonded to the driving substrate one by one, the epitaxial sub-wafers are fully paved to the maximum extent, invalid waste of driving substrate materials is avoided, and the auxiliary material cost and the overall production cost are remarkably reduced.

The invention discloses a microjet continuous synthesis process of triazole. The method comprises the following steps: preheating formamide, keeping hydrazine hydrate at normal temperature, continuously conveying hydrazine hydrate to a microjet mixing reactor through independent feeding channels according to a molar ratio of 4: 1 to 6: 1, and carrying out high-speed jet mixing and reaction in a mixing cavity; continuously conveying a reaction product to a buffer heat preservation tank for heat preservation reaction; and rectifying to recover formamide for recycling, and crystallizing a tower bottom material to obtain a triazole product. According to the invention, the whole-process continuous production of triazole synthesis is realized, so that the product quality is stable, the batch-to-batch fluctuation is small, the occupied area of equipment is reduced by about 80%, and the automation degree is high. By implementing the method disclosed by the invention, a high-quality triazole product with the yield of more than or equal to 95%, the purity of more than or equal to 99% and the content of 4-aminotriazole by-products of less than or equal to 1% can be produced, the pharmaceutical-grade standard requirements are completely met, and a new process route which is advanced in technology, economical, reasonable and environment-friendly is provided for industrial production of triazole.

The application discloses a kind of based on sand mixer intelligent material proportioning self-adaptive control system, belong to sand mixing control technical field, comprising: high-precision material characterization unit, for generating dynamic material characteristic vector;Multi-modal process perception unit, for synchronously collecting the torque vibration signal of mixing process, visual image sequence and chemical spectrum signal;Global knowledge base, for storing historical production case data, optimization strategy and model parameters;Core processor, including: multi-modal digital twin, autonomous decision engine, exception processor and instruction verification and smoother.The application, by fusing multi-source perception data to construct digital twin, realize the visualization and accurate prediction of performance of mixing process, and based on rolling optimization and autonomous learning mechanism, dynamically cooperates and adjusts stirring parameter and material proportioning, finally realizes sand performance stability, energy consumption optimization and the self-adaptive toughness control to abnormal working condition.

The invention relates to the technical field of semiconductor manufacturing equipment, in particular to a pressure control system of a wafer vertical process furnace. Comprising a process chamber; the gas inlet unit supplies process gas to the process chamber; the exhaust unit comprises a vacuum exhaust loop, a normal pressure / micro-positive pressure exhaust loop and an interlocking mechanism; the vacuum exhaust loop vacuumizes the process chamber to a vacuum or low-pressure state; the normal-pressure / micro-positive-pressure exhaust loop is used for exhausting when the process chamber is in a normal-pressure or micro-positive-pressure state; the interlocking mechanism is used for ensuring that only one loop is conducted with the process chamber; the sensing unit comprises a pressure sensor for monitoring the pressure in the process chamber; and the central control unit selectively conducts the vacuum exhaust loop or the normal pressure / micro-positive pressure exhaust loop through an interlocking mechanism. The pressure control system solves the problems of poor safety, low control precision and insufficient automation degree caused by single function or low integration level of the pressure control system of the wafer process furnace in the prior art.

The invention relates to a preparation method of high-purity acacetin-7-O-glucuronide, which comprises the following steps of: crushing dry branches and leaves of a verbenaceae plant millettian tree, performing reflux extraction by using a 60-80% methanol solution, combining extracting solutions, and concentrating to obtain an extract; carrying out gel column chromatography on the extract, carrying out gradient elution by using a methanol-water system, detecting by using thin-layer chromatography (TLC), collecting eluent containing acacetin-7-O-glucuronide, merging, and concentrating under reduced pressure to obtain crude fraction of acacetin-7-O-glucuronide. And separating and purifying by using preparative high performance liquid chromatography (PHPLC), and detecting each part of collected eluent by using high performance liquid chromatography (HPLC) to obtain the acacetin-7-O-glucuronide component with the purity of more than 98%. And carrying out TLC and HPLC purity detection and content determination on the obtained product, and establishing a quality control method. The process is simple and reasonable in design, high in separation speed, short in production period, high in product purity, controllable in quality and suitable for industrial production.

The invention discloses a method for achieving additive manufacturing high-temperature alloy grain supernormal coarsening based on seed crystal guided directional recrystallization heat treatment, and relates to a coarsening method for additive manufacturing high-temperature alloy grains. The invention aims to solve the technical problem of insufficient high-temperature creep property caused by small grain size of the existing additive manufacturing nickel-based high-temperature alloy. According to the method, the single crystal layer with target orientation, namely the seed crystal, is prepared in the additive manufacturing stage, then the grain boundary of the seed crystal is continuously heated through the electromagnetic induction coil in the subsequent heat treatment, forced recrystallization is carried out by taking the seed crystal as a unique or absolute dominant growth source, namely oriented recrystallization is carried out, so that the growth of other crystal grains is inhibited, and the yield of the product is improved. And finally, an ultra-large grain structure with the seed crystal as the main source is obtained in the additive component, the average grain length of the ultra-large grain structure can be increased by two or more orders of magnitude compared with the original additive state and reaches the millimeter level or even the centimeter level, and the crystal orientation is highly consistent with the preset seed crystal orientation.

This invention relates to the field of injection molding machine technology, and in particular to a screw unit for a powder injection molding machine, comprising a spline sleeve and multiple kneading block units sequentially sleeved on its outer peripheral wall; the lower end of the spline sleeve is provided with a stop boss, the boss having a first helical surface and a first positioning hole, the spline sleeve being paired with a drive component corresponding to each kneading block unit; the kneading block unit includes a kneading disc, a spring, and a locking pin, the kneading disc having a second helical surface and a second positioning hole, the lower end of the locking pin having a locking part adapted to the positioning hole and a third helical surface cooperating with the drive component, and the spring being located between adjacent kneading discs or between the kneading disc and the stop boss. This invention achieves kneading disc phase adjustment simply by applying and releasing axial force, without disassembling the entire screw functional unit, improving production efficiency. Furthermore, the locking part and positioning hole are precisely matched during operation, ensuring kneading stability and molding accuracy. The modular structure offers excellent adaptability and maintainability.