1414 results about "Materials preparation" patented technology

The invention discloses preheating-free welding maritime work steel with excellent low-temperature toughness and a preparation method of the preheating-free welding maritime work steel, and belongs to the field of steel and iron material preparation. The produced steel plate has good comprehensive mechanical properties through alloy component-secondary rolling-controlled cooling process coupling design, the problem that the strength, plasticity, low-temperature toughness and preheating-free post-welding performance of the steel plate are difficult to match and harmonize is solved, the steel plate has ultrahigh-strength plasticity, excellent low-temperature toughness and excellent Z-direction performance, and room-temperature preheating-free welding can be achieved.

The invention provides an electric pile assembly line which comprises a preassembling branch line, a material preparation mechanism, a transfer mechanism and a final assembly branch line, the preassembling branch line is adjacent to the final assembly branch line, the material preparation mechanism is arranged at one end of the final assembly branch line, the transfer mechanism is located between the final assembly branch line and the material preparation mechanism, and the material preparation mechanism is used for storing diaphragms, bipolar plates and sealing gaskets. The preassembled branch lines are used for assembling the liquid flow frames, the partition plates and the blankets to form electrodes; the transfer mechanism is used for transferring the diaphragms, the bipolar plates, the sealing gaskets and the electrodes on the adjacent preassembled branch lines to the final assembly branch lines so as to stack the diaphragms, the bipolar plates and the sealing gaskets to form an electric pile. According to the invention, the distances between the transfer mechanism and the material preparation mechanism, the general assembly branch line and the adjacent pre-assembly branch line are equivalent, so that bipolar plates, sealing gaskets and diaphragms on the material preparation mechanism and electrodes on the pre-assembly branch line can be well transferred and stacked on the general assembly branch line to form an electric pile, the space layout is reasonable, the occupied production space is small, the cost is reduced, and the production efficiency is improved. The production efficiency is improved.

The invention provides a parameter monitoring method and system in a composite material preparation process based on optical fiber sensing, computer equipment and a medium, and belongs to the field of composite material detection. Center wavelength signals in the resin diversion stage are continuously collected through optical fiber strain sensors in a distributed optical fiber grating sensing array, and the distributed optical fiber grating sensing array is embedded into the multiple layers of dry carbon fiber cloth in the fiber preform in advance; the flowing position and time of the resin in the fiber prefabricated body are determined according to the minimum value of the central wavelength signal offset in the resin flow guide stage, and the flowing front edge of the composite material is constructed according to the flowing positions and time of the resin corresponding to the optical fiber strain sensors in the fiber prefabricated body. According to the method, the change of the structure state of the composite material in the resin diversion process can be continuously monitored in a complex variable-temperature environment, and the accurate monitoring of the three-dimensional resin flowing front edge in the composite material liquid forming process is realized.

The invention discloses a wire rod for 2000MPa-level prestressed steel with the large specification of 15mm and a preparation method of the wire rod, and belongs to the technical field of metal material preparation and metal pressure processing. The invention aims to develop a 15mm large-specification high-performance prestressed steel wire rod with a novel component system and a matched production process thereof, the tensile strength of the wire rod is greater than or equal to 1200MPa, and the percentage reduction of area (after aging) is greater than or equal to 30%; the product can be used as a large-specification high-strength high-speed rail plate prestressed steel wire and a 1960-2000MPa-grade high-performance prestressed steel wire and a steel strand. According to the method, the technological process of molten iron pretreatment, converter smelting, LF refining, RH refining, square billet continuous casting, casting billet slow cooling pit slow cooling, casting billet heating, high-pressure water descaling, controlled rolling and controlled cooling and PF line heat preservation channel slow cooling and a complete and controllable production process system are adopted; and the harsh requirements of large-size high-performance prestressed materials of modern important projects on the performance of the wire rod are met.

The invention provides a preparation method and application of a foamy copper reinforced aluminum-based composite material, and belongs to the technical field of aluminum-based composite material preparation. According to the foamy copper reinforced aluminum-based composite material, a variable-frequency and variable-power ultrasonic vibration assisted centrifugal casting technology is adopted, strong centrifugal force and the ultrasonic cavitation effect are utilized, so that the biological flowability of aluminum water is improved, the wettability between aluminum and copper is improved, and in combination with the effects of an auxiliary agent and Zn-Al or Sn-Al intermediate alloy, the foamy copper reinforced aluminum-based composite material is obtained. The problem that the binding force of foamy copper and an aluminum matrix is poor is solved, the adopted ultrasonic power is low (smaller than or equal to 1000 W), the preparation technology is simple, the obtained foamy copper reinforced aluminum matrix composite is free of obvious cracks and holes and high in density and thermal diffusion coefficient, and a light intelligent thermal management material can be provided for the field of electronic equipment.

The invention provides a method for preparing a high-performance silicon nitride ceramic ball based on a pressure modulation sintering technology, and relates to the field of functional ceramic material preparation, and the method comprises the following steps: 1, preparing a green body; 2, PMS sintering is carried out; step 3, cooling; traditional high-performance silicon nitride ceramic balls (the relative density is required to be larger than 99%, the Vickers hardness is required to be larger than or equal to 1500 kgf / mm, the bending strength is required to be larger than or equal to 920 MPa, and the fracture toughness is required to be larger than or equal to 6.0 MPa.m / ) are mainly prepared through a two-step process of normal pressure / air pressure sintering (GPS) and hot isostatic pressing (HIP). Although high densification of the material can be realized, the method has the problems of complicated process flow, high energy consumption, long production period, high equipment occupancy rate and the like.

The invention discloses a recycled aggregate close packing method established based on a volume expansion and contraction putting principle, belongs to the technical field of building material preparation, and is mainly applied to grading optimization and close packing treatment of recycled aggregate in production of building materials such as concrete. Comprising the following steps: S1, constructing a recycled aggregate three-dimensional particle model; S2, constructing a recycled aggregate accumulation model; and S3, performing grading optimization. The three-dimensional morphology characteristics of irregular shape, protruding edges and corners and the like of the recycled aggregate are fully considered, the volume expansion and shrinkage putting principle is combined, efficient collaborative accumulation of the coarse and fine aggregate is achieved, the accumulation density is improved by 8%-12% compared with that of a traditional method, and the accumulation structure is remarkably improved; the optimal feeding proportion and sequence of the aggregates of different particle sizes are accurately determined, the advantages of all the particle sizes are fully played, and the filling effect in the concrete is improved.

The utility model discloses step-by-step heightening and jacking equipment for lifting a large device, which is characterized in that a lifting system base (2) is provided with a heightening block lifting oil cylinder (3), a heightening block locking device of a heightening block jacking platform (4) corresponds to a locking groove in position, a material preparation system is positioned on the outer side of a lifting system, heightening blocks (12) are stacked and placed in a heightening block material preparation area (13), and the heightening block lifting oil cylinder (3) is connected with the heightening block jacking platform (4). The left side material preparation lifting device and the right side material preparation lifting device can separate the upper block-up block (12) from the bottom block-up block (12), and the bottom block-up block (12) is conveyed into the block-up block containing area (9) through the automatic feeding platform. According to the utility model, manpower and material resources can be saved, and the block-up efficiency can be greatly improved.

The invention provides a high-dielectric low-loss ceramic composition as well as a preparation method and application thereof, and relates to the technical field of functional ceramic materials, the high-dielectric low-loss ceramic composition comprises a perovskite type compound serving as a main component and an auxiliary component; wherein the perovskite type compound contains a Ba element and a Ti element, and the auxiliary components comprise a first auxiliary component containing an Mg element, a second auxiliary component containing an Nb element, a third auxiliary component containing an Mn element, a fourth auxiliary component containing a rare earth element R, and a fifth auxiliary component containing SiO2. According to the present invention, the ratio of the main components to the auxiliary components is subjected to design optimization, the ratio of the Nb element in the second auxiliary component to the Mn element in the third auxiliary component is adjusted, and the material preparation process parameters are subjected to optimization control, such that the dielectric constant and the temperature stability of the dielectric ceramic material are improved, and the dielectric loss is reduced.

The invention discloses a recycled modified polypropylene composite material preparation system and a resource recovery method, and relates to the technical field of high polymer material science and engineering. The raw material pretreatment module adopts near infrared spectrum classification, multi-stage cleaning, drying and crushing, and the moisture content is controlled to be less than 0.5%; the melt blending module melts the materials at 180-220 DEG C, modifiers and additives are added, and vacuum degassing is performed to remove impurities; adding a reinforcing agent into the modification reinforcing module, and performing ultrasonic dispersion and dynamic vulcanization; the molding processing module is used for manufacturing a product through extrusion, injection molding or calendaring; the quality detection module is used for detecting mechanical and thermal properties; the waste recovery module is used for crushing and melting granulation to realize a closed loop; the intelligent control module uses a PLC to coordinate each module. Integrated treatment of waste polypropylene is achieved, the purity of raw materials and the performance of a composite material are improved, the resource utilization rate is increased through closed-loop recycling, manual intervention is reduced through intelligent control, product stability is guaranteed, economic and environment-friendly benefits are achieved, and high-valued circulation of waste plastic is promoted.

The invention provides a BIM-based pipeline comprehensive arrangement construction method, and relates to the technical field of building construction.The method comprises the steps that (1) modeling is conducted according to specialties, specifically, a Magicad platform serves as basic modeling software, and BIM models of all specialties are systematically established; (2) pipeline integration: combining the professional BIM models into the same space through a Magicad platform; (3) collision detection: performing collision detection on the first pipeline comprehensive model through a Magicad platform; (4) collision optimization adjustment: optimizing pipeline arrangement of the first pipeline comprehensive model according to a collision detection result; (5) design change and entity verification: verifying the consistency of the second pipeline comprehensive model and the site, and optimizing and adjusting the second pipeline comprehensive model according to a verification result and design drawing change; (6) process simulation: carrying out visual simulation on the construction process of the final installation scheme; (7) material preparation and construction; and (8) quality acceptance. According to the scheme, the construction efficiency can be improved, and labor and material cost is reduced.

The invention discloses an additive manufacturing method for in-situ regulation and control of a TiB / TiC titanium-based heterostructure through laser deposition, and belongs to the technical field of composite material preparation. According to the method, laser path planning is carried out based on three-dimensional modeling and layered slicing; the preparation method comprises the following steps: ball-milling and mixing titanium alloy powder, nano boron carbide powder and trace rare earth powder according to a specific proportion, and carrying out vacuum drying; and addition of trace rare earth is beneficial to grain refinement and improvement of reinforcement phase distribution and interface bonding. Under the action of a high-energy laser beam, the mixed powder is fused in an argon protective atmosphere, an in-situ reaction is carried out at the same time, and TiB and TiC reinforced phases are generated; the gradient component design can be implemented in the laser deposition process, specifically, the powder feeding proportion of B4C powder is dynamically controlled through a program, the gradient of the B4C powder is increased from the bottom layer to the surface layer in the direction perpendicular to the substrate, and therefore the gradient heterostructure with the enhanced phase content and performance gradually changed is formed. According to the method, the problems of non-uniform reinforcement phase distribution, obdurability mismatch, plasticity loss and the like in a traditional method are solved, the prepared composite material or gradient component has high strength (the tensile strength reaches 987.66 MPa) and good plasticity and toughness matching, no crack defect exists, and the method is suitable for manufacturing of high-performance parts in the fields of aerospace and high-end machine manufacturing.

The present application relates to the field of door core material preparation, and particularly relates to a heat-insulating and fireproof door core material for security doors and a preparation method thereof, comprising a protective layer, a heat-insulating layer and a core part, wherein the core part comprises a plurality of springs arranged at equal intervals and fixed plates arranged at both ends of the springs; the heat-insulating layer is arranged outside the fixed plates; and the protective layer is bonded to the outside of the heat-insulating layer and is a foamed aluminum plate, which is prepared as follows: S1, cutting the fixed plates and then welding spring fixing bases and fixing buckles; S2, arranging and fixing the springs; S3, weighing the component materials of the heat-insulating layer, adding water and mixing uniformly; S4, based on a core material preparation system, sequentially completing pouring, jarring, smoothing and heat-insulating drying of the two heat-insulating layers after setting; S5, preliminarily determining whether the preparation of the heat-insulating layer meets preset standards according to the measured compressive strength; and S6, bonding the protective layer. On the basis of ensuring the performance of the core material, the present application can also be applied to the door core of security doors with different thicknesses.

The invention discloses a silicon mullite brick with high connection stability and a production process thereof, and belongs to the technical field of silicon mullite brick preparation. Through the composite formula design of the multi-graded silicon carbide aggregate and the in-situ generated mullite precursor and in combination with a microwave-air pressure coupling sintering process, the optimization of the material structure is realized. Wherein the silicon carbide aggregate is subjected to surface etching to form a microporous structure, and the microporous structure and the aluminum phosphate nanofiber reinforced matrix form a three-dimensional interlocking network; dual-band microwave alternate radiation and staged air pressure dynamic regulation and control are adopted, substance diffusion is promoted at low temperature, and meanwhile pore formation is inhibited at high temperature; and in the gradient cooling stage, the grain boundary stability is enhanced through controllable oxygen partial pressure and rare earth steam treatment. The process effectively improves the interface bonding strength and thermal shock resistance of the silicon mullite brick, reduces the sintering energy consumption, and is suitable for refractory material preparation of high-temperature equipment such as a cement kiln and an incinerator.

The invention relates to the technical field of wave-absorbing materials, in particular to a broadband wave-absorbing material and a preparation method and application thereof. According to the preparation technology of the wave-absorbing material, a non-woven fabric carrier with graded pores and continuous gradient distribution is constructed by virtue of induction of a centrifugal force field, and then the non-woven fabric carrier is placed in a magnetic dispersion liquid system to be subjected to impregnation ultrasonic dispersion load treatment, so that heterogeneous interface structures are constructed on the surfaces and the interiors of fibers, and the prepared material fabric has the characteristics of light weight and broadband wave-absorbing performance; the method is suitable for military and civil high-tech fields such as electromagnetic protective clothing and invisibility. The method has the advantages of short production period, high raw material utilization rate and the like.

The invention belongs to the technical field of cable production, and particularly relates to a cable extruder which comprises a barrel, a conveying shaft is rotatably mounted on the inner wall of the barrel, a conveying motor is fixedly mounted at one end of the barrel, the output end of the conveying motor is fixedly connected with one end of the conveying shaft, and conveying blades are fixedly mounted on the outer wall of the conveying shaft. Hoppers are symmetrically arranged above the barrel, and stirring assemblies are arranged in the hoppers. When the feeding box at the bottom of one hopper is opened for material conveying work, the feeding box at the bottom of the other hopper is in a closed state, raw materials can be added into the hopper and stirring work can be carried out at the moment, and by repeating the operation, when one hopper is used for material conveying, material preparation can be carried out on the other hopper; therefore, after one hopper completes material conveying work, the other hopper continues to convey materials, the materials can be continuously conveyed in the barrel, and the production efficiency is effectively improved.

The application discloses a composite precipitation strengthening type high-entropy alloy and a preparation method thereof, and belongs to the field of metal material preparation. The high-entropy alloy is composed of Al, Co, Cr, Fe, Ni, Cu, V and Ti elements, and a general formula thereof is Al a Co b Cr c Fe d Ni e Cu f V g Ti h , wherein 2 <= a <= 4, 16 <= b <= 20, 16 <= c <= 20, 16 <= d <= 20, 35 <= e <= 40, 0 <= f <= 3, 0 <= g <= 3, 0 <= h <= 3, and a + b + c + d + e + f + g + h = 100. The high-entropy alloy is prepared through vacuum arc melting and heat treatment, and has excellent mechanical properties. The various metal raw materials used are environment-friendly, the preparation process is relatively safe, and the high-entropy alloy can be industrially produced.

The invention discloses a phosphorus slag ceramsite lightweight thermal insulation concrete structure preparation control system and method, and particularly relates to the technical field of building material preparation, and the method comprises the following steps: collecting ceramsite physical information, establishing a multi-dimensional parameter set, and setting a component mapping rule; ceramsite space configuration is completed according to mapping; the prepared ceramsite is subjected to surface pretreatment and mixed to form preformed concrete, and the preformed concrete is cured after performance evaluation; maintenance is controlled according to a multi-section temperature and humidity linkage path, and whether the next section is entered or not is judged by the trained machine learning model; when the conditions are not met, the control conditions are updated through optimization steps, and judgment is executed again until all the curing processes are completed; according to the invention, the performance matching configuration of the phosphorus slag ceramsite in the structure is realized, and the preformed concrete is maintained after the performance of the preformed concrete reaches the standard; and through path analysis and state judgment, the multi-section curing process is dynamically regulated and controlled, and the performance consistency and control precision of the concrete structure are improved.

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 municipal old pipe network repair, and aims to solve the problems that a traditional excavation repair method is long in construction period and affects traffic and environment, and an existing ultraviolet light curing repair technology is not fine in process step and inaccurate in parameter control. The background technology shows that the municipal old pipe network maintenance demand is urgent in the urbanization process, the trenchless repair technology is concerned due to the fact that large-scale excavation is not needed, and the ultraviolet light curing repair technology is rapid in repair and reliable in quality, but the steps of pipeline pretreatment, material preparation and the like are lack of standardized processes. And improper control of key parameters such as curing temperature and time easily affects the performance of the lining pipe. On the basis, according to the non-excavation ultraviolet light curing repair construction method for the municipal old pipe network, through refined steps and strict parameter control, the repair effect and efficiency are improved, the influence on normal operation of a city is reduced, and an optimization scheme is provided for pipe network maintenance.

The invention relates to the technical field of cutting, and discloses an aluminum profile machining and cutting device which comprises a base table, a bearing table is fixedly connected to the top of the base table, cutting tables are symmetrically and fixedly connected to the outer wall of a shaft rod of the bearing table, and a material preparation table is arranged on one side of each cutting table and fixedly installed above the base table. A cutting structure is arranged over the cutting tables, clamping assemblies are arranged on the surfaces of the cutting tables, inclined vibration assemblies are arranged below the two cutting tables, through the inclined vibration assemblies, after cutting is completed, the inclined vibration assemblies drive the cutting tables to rotate in a hinged mode with a bearing table shaft rod as the axis, the ends, away from the bearing table, of the cutting tables are made to incline downwards, and a downward inclined face is formed; in the inclination process, the inclination vibration assembly enables the surface of the cutting table to vibrate through mechanical vibration, chippings are assisted to fall off, the situation that the residual chippings influence the follow-up cutting precision or scratch the surfaces of the pipes is avoided, the pipes and the cutting chippings are efficiently removed through the dual action of gravity and vibration, and the continuous operation efficiency is improved.

The invention provides a charging tray replacement method and system, and the method comprises the steps: receiving production data of a chip mounter through central control equipment, and determining charging tray demand data according to the production data; according to the tray demand data, the central control equipment sends a material preparation instruction to the material preparation device and sends a transportation instruction to the transportation equipment, and the material preparation instruction carries the tray demand data; the material preparation device stores an unused first material tray into a temporary storage bin according to the material tray demand data; taking out the first charging tray in the temporary storage bin through a manipulator of the transportation equipment, and transporting the first charging tray to a material changing area corresponding to the chip mounter; transferring the first material tray and a used second material tray in the chip mounter to a material receiving device of transportation equipment by using a manipulator; a material receiving device is used for trimming the material belt of the second material disc, and the trimmed material belt is attached to the material belt of the first material disc; and transferring the laminated first tray to a chip mounter by using a manipulator. The method can improve the production efficiency.

A paddle racket manufacturing method comprises a material preparation step, a classification step, an adiabatic step, a cooling step and a bonding step, the material preparation step preparing a plurality of processing components; the classification step classifying each of the plurality of processing components into a pre-adiabatic processing component and a non-adiabatic processing component according to a heating characteristic and a pressurizing characteristic corresponding to a material characteristic of its composition; the adiabatic step applying an adiabatic heating on the pre-adiabatic processing component according to the material characteristic to form a processing component already processed with adiabatic process; the cooling step cooling the processing component already processed with adiabatic process to normal temperature; and the bonding step using cold bonding to connect the processing component already processed with adiabatic process with the non-adiabatic processing component.

The invention relates to the technical field of preparation of polyurea elastomer materials, in particular to a multi-synergistic enhanced polyurea elastomer material as well as a preparation method and application thereof. The material is prepared from a specific component A and a specific component B through a reaction, and a synergistic flame-retardant system, a multi-scale enhancement system and an intelligent protection system are innovatively integrated. A ceramic framework carbon layer is formed through 'phosphorus-nitrogen-silicon' synergy, step-by-step dissipation of stress is achieved through 'nanometer-micrometer' synergy, dynamic long-acting protection is provided through 'self-repairing-hydrophobic' synergy, and the problem that a traditional protection material is single in performance and restricts one another is solved. The preparation method adopts a unique nanometer pre-dispersion and multi-step charging process. Compared with the prior art, the material provided by the invention simultaneously has excellent fireproof and heat-insulating, impact-resistant, wear-resistant and self-repairing waterproof performances, and can fundamentally improve the safety and reliability of a battery pack and a chassis of a new energy automobile.

The invention relates to the technical field of ceramic-based composite material preparation, in particular to an aluminum oxide-based refractory ceramic composite material and a preparation method thereof.The aluminum oxide-based refractory ceramic composite material is prepared from, by mass, 80-90 parts of modified aluminum oxide, 5-10 parts of modified nano zirconium oxide suspension liquid and 3-5 parts of nano titanium dioxide sol, according to the invention, material component modification, interface structure design and gradient protection technology are optimized, compatibility of a matrix and a reinforced phase is cooperatively regulated and controlled, and low-temperature presintering and surface functionalization treatment technologies are improved, so that thermal shock resistance stability, high-temperature strength retention rate and chemical erosion resistance of the material are improved; the refractory material has excellent durability, provides a new solution for high-performance and engineering application of the refractory material, and has a wide application prospect.

The invention discloses a method for preparing a C / C-SiC composite material through multi-stage recovery of carbon / carbon composite material processing waste, and belongs to the technical field of C / C composite material preparation. The method comprises the following steps: carrying out multi-stage screening treatment on the carbon / carbon composite material processing waste, and screening and separating short carbon fibers and pyrolytic carbon powder; mixing the screened short carbon fibers and pyrolytic carbon powder with phenolic resin, industrial silicon powder and SiC powder, and preparing a fiber reinforced resin block in a mold pressing manner; and carrying out one-step continuous carbonization and ceramic heat treatment on the fiber reinforced resin block to finally obtain the C / C-SiC composite material. According to the method, high-added-value recycling of the C / C processing waste is achieved, the process is simple, the cost is low, operation is convenient and fast, the problems of resource waste and environmental pollution caused by existing waste treatment are solved, and the prepared C / C-SiC composite material is excellent in performance and can be widely applied to the fields of aerospace, high-end manufacturing and the like.

The invention relates to the technical field of multi-layer material preparation, in particular to a high-light-transmittance weather-proof impact-resistant striped sound insulation board. The problem that transparency, weather resistance and sound insulation effect of a traditional stripe material are difficult to consider at the same time is solved. The light scattering and absorption center is reduced and high transparency and low haze are realized through reactive extrusion of the recycled material, combination of high-temperature adsorption activated carbon, multi-stage high vacuum and deep purification of a reactive decolorizing agent, and matching of transparent dispersion diffusion master batch and a compatilizer. The surface layer adopts the core-shell weather-resistant master batch and the secondary high-energy UV fluorosilicone curing coating for double shielding of ultraviolet and inhibition of photodegradation and yellowing; styrene-maleic anhydride damping resin is introduced into the middle layer, and uniform inclined micropores and asymmetric stripes formed by supercritical CO2 are combined, so that the medium and low frequency sound insulation index is improved; the bottom layer is repaired and guaranteed to be durable in impact resistance by virtue of a core-shell toughening agent and molecular chain extension; the defects of traditional products are overcome, and the service life requirement of sound barriers for expressways and rail transit is met.

A 10-kW class deep penetration laser welding method and auxiliary material, and an auxiliary material preparation method. The 10-kW class deep penetration laser welding method comprises: during 10-kW class laser welding, simultaneously feeding a flux into a molten pool as an auxiliary material, to achieve full coverage of the surface of the molten pool.

The invention discloses an endogenous steam in-situ braking expansion device and a hard carbon material preparation method, and belongs to the technical field of biomass pretreatment, and the endogenous steam in-situ braking expansion device comprises a steam explosion reaction cabin and a water storage cabin which are communicated. An electric heating device is arranged outside the steam explosion reaction cabin, the steam explosion reaction cabin is communicated with the water storage cabin, and an inductance heating device is arranged outside the water storage cabin. The brake expansion device adopts a mode of combining electric heating and inductive heating, water vapor is generated in situ, and energy loss caused by vapor condensation is effectively reduced. Compared with a traditional steam explosion machine, the steam explosion machine has the advantages that energy consumption is effectively reduced, materials can be conveniently fed and discharged, and meanwhile the problem that steam is generated, enters the steam explosion reaction cabin, is condensed and drips on the materials, and consequently treatment is not uniform is solved.

The invention discloses a ceramic precursor efficient impregnation and solidification integrated device and method, belongs to the technical field of ceramic matrix composite material preparation, and solves the problems of low production efficiency, large raw material loss and poor impregnation effect caused by step-by-step impregnation and solidification of a ceramic precursor in the prior art. The device specifically comprises an integrated furnace body, an ultrasonic vibration assembly, a vacuum system, a temperature control system and a precursor storage tank, and an objective table for placing a workpiece to be impregnated is arranged in the integrated furnace body. During precursor solution impregnation, the vacuum system extracts air in the integrated furnace body to form negative pressure, and the precursor solution in the precursor storage tank is extracted into the furnace body through the negative pressure to impregnate the workpiece; after impregnation is finished, the workpieces are directly heated and cured in the integrated furnace body, the process of transferring the workpieces from the impregnation tank to a curing furnace is omitted, and the production efficiency is improved; and meanwhile, poor impregnation effect caused by re-permeation of air into pores of the workpiece after the workpiece is in contact with the air in the transfer process is prevented.