36results about How to "Improve performance uniformity" patented technology

The invention belongs to but is not limited to the technical field of aluminum alloy preparation, and discloses a high-plasticity aluminum alloy prepared from secondary aluminum and a preparation method, high-quality secondary aluminum waste is selected, and obvious impurities are removed; carrying out chemical or mechanical cleaning on the secondary aluminum, and sorting; the pretreated secondary aluminum waste is added into a smelting furnace to be smelted; a purifying agent is added for melt purification; the melt is further purified through inert gas stirring and standing; adding a proper amount of alloy elements into the melt; under the protection of inert gas, uniformly stirring the melt; casting the melt into a cast ingot by adopting a semi-continuous casting or continuous casting process; controlling the cooling speed; carrying out homogenizing heat treatment on the cast ingot to eliminate composition segregation in the cast ingot; and extruding and rolling to obtain the high-plasticity aluminum alloy material. According to the method, the purity of the aluminum alloy is improved, the performance uniformity is enhanced, and the aluminum alloy material with high plasticity and excellent mechanical performance is obtained and is suitable for industrial application with high requirements.

The invention discloses a titanium coil heat treatment method, and belongs to the technical field of titanium alloy. According to the method, a titanium roll vacuum annealing heating mode is provided and comprises the heating rate, the heat preservation temperature, the heat preservation time, the vacuum degree, protective gas control and the like, the wide titanium roll with the width being 1500-2000 mm, the thickness being 0.3-3 mm and the good surface quality is finally prepared, the transverse and longitudinal yield strength difference is smaller than 10 MPa, the percentage elongation after fracture difference is smaller than 3%, and the problems that an existing titanium roll is large in vacuum annealing anisotropy, poor in thermal conductivity and the like are solved. The performance uniformity of the titanium and titanium alloy coiled tape is improved, the formability of a titanium material is improved to a great extent, and the titanium alloy coiled tape has better comprehensive performance and good economic benefits.

The invention relates to the technical field of metal surface treatment, in particular to a method for improving the surface performance of a metal part through salt bath composite nitriding treatment, and particularly relates to a salt bath composite nitriding treatment process for a high-wear-resistance and high-fatigue shaft pin. Comprising the following steps: 1) pretreatment: carrying out sand blasting cleaning on the shaft pin and polishing until Ra is less than or equal to 0.8 mu m; 2) salt bath composite nitriding treatment: immersing the shaft pin into a salt bath containing sodium cyanate, potassium cyanate, sodium carbonate, lithium carbonate and an additive, and keeping the temperature at 560 DEG C for 2-4 hours; and (3) cooling and strengthening treatment: slowly cooling after dynamically cooling to 500 DEG C, and releasing residual stress in combination with oxidation treatment and low-temperature tempering. According to the process, a compact nitriding layer and a micro-boronizing layer are formed through the synergistic effect of rare earth oxide and fluoride, so that the surface hardness of the shaft pin reaches HV800-1100, the depth of the nitriding layer is 0.1-0.3 mm, the wear resistance is remarkably improved, the fatigue life is remarkably prolonged, the corrosion resistance is remarkably improved, and the process is suitable for surface strengthening of high-load mechanical parts.

The invention discloses a low-Mo plastic mold steel plate and a production method thereof. The steel plate comprises the following chemical components in percentage by weight: 0.32 to 0.42 percent of C, 0.2 to 0.4 percent of Si, 1.1 to 1.6 percent of Mn, 0.01 to 0.05 percent of Al, 1.5 to 2.0 percent of Cr, 0.10 to 0.30 percent of Mo, 0.9 to 1.1 percent of Ni, less than or equal to 0.02 percent of P, less than or equal to 0.01 percent of S and the balance of Fe and inevitable impurity elements. The production method disclosed by the invention has the advantages of good performance uniformity, low production cost and the like, and has great popularization and application values.

This invention discloses a method for controlling the uniformity of gear steel microstructure, including hot metal desulfurization and vanadium extraction, semi-steel converter smelting, LF refining, RH refining, and continuous casting processes. The method controls the solidification process of the molten steel in the molten pool during continuous casting, ensuring solidification is completed within a 1 / 4 arc-shaped region of the slab, and implementing a specified cooling and solidification control process. This method effectively improves the macroscopic solute concentration uniformity in all directions of the cross-section of the gear steel continuous casting slab, improves the regional symmetry of the solidified microstructure, and promotes more uniform phase transformation and stress distribution in the gear microstructure during gear processing and subsequent heat treatment. The range of distance between the equiaxed crystal zone boundary and the slab surface is reduced from 30-40 mm to 10-15 mm. After rolling into a round bar, the range of distance between the equiaxed crystal trace zone boundary and the round bar surface is controlled to ≤5 mm, and the range of solute segregation (circumferential) at the same radial distance from the surface of the round bar is ≤0.02. The resulting gear steel grain size stabilizes from grade 6.0-7.0 to grade 7.0.

This invention discloses a rapid design method for low-sidelobe reflector antennas applied to complex requirements, comprising the following steps: S1: Calculate the initial focal coordinates of the long-axis reflector based on the structural parameters of the long-axis reflector, and calculate the half-angle of the main reflector and the distance from the feed to the vertex of the sub-reflector; S2: Calculate the initial focal coordinates of the short-axis reflector based on the principle of equal optical path length; S3: Introduce a coefficient set to construct a normalized focal distribution feature; S4: Keep the focal points fixed and dynamically reconstruct the focal distribution of the long and short axes within the full illumination angle range; S5: Calculate the coordinates of the main reflector and the sub-reflector; S6: Iteratively adjust the boundary focal points and the coefficient set to converge and obtain a reflector antenna that meets the low-sidelobe index. This invention has strong adaptability and extremely low algorithm freedom, with only 7 degrees of freedom; it can quickly achieve high-performance optimization of complex reflectors, perfectly adapt to irregularly shaped reflector antennas with large aspect ratios, and solve the design problem of asymmetric structures.

The present application relates to the technical field of intelligent production line, specifically to an intelligent suspension conveying device for weapon manufacturing, comprising a conveying line body and a line body suspension module, the number of the line body suspension module is several, and the several line body suspension modules are distributed at equal distances along the path of the conveying line body, the line body suspension module comprises a fixing seat, a heave mechanism, a weapon clamping plate, a rotary driving mechanism and a torque limiting locking mechanism, the fixing seat is slidably arranged on the conveying line body and is movable along the path of the fixing seat, the heave mechanism of the line body suspension module can drive the clamped weapon to make continuous lifting and heaving actions along the lifting track, so that different axial positions of the weapon can alternately pass through the heating gap of the high-frequency heater coil, the position of the originally fixed workpiece area corresponding to the heating gap is continuously changed, thereby ensuring the uniform heating of the whole workpiece, compensating for the inherent heating defects of the high-frequency heater coil from the conveying process level, and improving the overall performance uniformity of the weapon after heat treatment.

The invention discloses a preparation method of a TC4 titanium alloy coiled strip, which comprises the following steps: by adopting specific titanium blank forging, rolling and annealing modes, after a cast ingot is forged and cogged, a plate blank is continuously returned to a furnace for heat preservation, the plate blank is subjected to double annealing, the annealing temperature is 830-890 DEG C, and after heat preservation is performed for 4-8 hours, the plate blank is subjected to heat preservation for 3-5 hours at 450-550 DEG C; the coated titanium alloy plate blank is conveyed to a heating furnace to be heated and rolled, and a coiled strip obtained after hot rolling is completed is cooled and then subjected to cover-type furnace annealing treatment with electric heating gradient temperature rising and argon protection; and finally, the wide hot-rolled titanium coil with the width of 1500-2000 mm, the thickness of 4-10 mm and good surface quality is prepared. The problems of narrow plate width, small coil weight, poor titanium alloy coil surface quality and the like of the titanium and titanium alloy plate strip produced by the existing coil method are solved, the performance uniformity of the titanium and titanium alloy coil strip is improved, the product quality is improved to a great extent, the production cost is reduced, the yield is improved, and good economic benefits are achieved.

The invention provides limit specification hot continuous rolling weathering steel as well as a manufacturing method and application thereof. The component C is 0.05-0.07%; 0.26%-0.35% of Si; 0.8% to 1.2% of Mn; p is less than or equal to 0.090%; s < = 0.002%; 0.5%-0.8% of Cr; 0.05%-0.09% of Ni; 0.15% to 0.20% of Cu; 0.020% to 0.045% of Al < t >; 0.010% to 0.020% of Ti, and 0.020% to 0.060% of Nb; and the balance of Fe and inevitable inclusions. According to the hot continuous rolling weather-resistant steel plate and the preparation method thereof, the hot continuous rolling weather-resistant steel plate which is 20-25.4 mm in thickness, 2000-2130 mm in width, high in low-temperature toughness and high in performance uniformity in limit specification, good in coil shape and surface quality and free of tower shape and coil loosening in the coiling process is obtained through component design in cooperation with process production.

This application provides a quenched and tempered steel plate and its production method. The quenched and tempered steel plate comprises the following components by mass percentage: C: 0.15–0.20%; Si: 0.20–0.40%; Mn: 1.20–1.50%; Cr: 0.20–0.50%; Ni: 0.10–0.20%; Nb: 0.020–0.040%; Ti: 0.010–0.040%; Mo: 0.30–0.50%; B: 0.0010–0.0025%; P≤0.015%, S≤0.004%; N≤0.004%, Als: 0.010–0.060%, with the remainder being Fe and unavoidable impurities. This application manufactures a thick, high-strength quenched and tempered steel plate with high surface quality by adjusting the elemental composition and content of the quenched and tempered steel plate, specifically by adding certain amounts of Ni, Cr, and B.

The utility model relates to the field of foam packaging materials, in particular to a foam packaging material preparation method and a roller press for foam packaging material production. A roller press for foam packaging material production is characterized in that the roller press comprises a rack body; the rolling assembly is arranged on the rack body and is provided with a long roller assembly and a sleeve roller assembly which are oppositely arranged in a spaced mode, the sleeve roller assembly comprises two sleeve rollers which are coaxially arranged in a spaced mode, and the two sleeve rollers move in the same direction and are arranged on the same horizontal plane with the long roller in parallel. According to the foam packaging material rolling device, the two sleeves are combined with the foam packaging material mold of the columnar structure to conduct rolling treatment, it is effectively guaranteed that operation is conducted on the foam packaging materials of different sizes, actual generation is facilitated, and the requirements of the foam packaging materials of different sizes are met; and the foam material is directly rolled on the surface of the mold, so that actual generation and packaging are facilitated, and the working efficiency is improved.

This invention discloses an irradiation crosslinking device for the production of special cables using irradiation crosslinking technology, comprising a housing (1), an electron accelerator irradiator (2) located in the upper part of the housing (1), reflective magnet structures (3) located on both sides below the ray outlet of the electron accelerator irradiator (2) located inside the housing (1), an air outlet (4) located on the side of the electron accelerator irradiator (2) located in the upper part of the housing (1), an ozone adsorption component (6) located at the air outlet (4), and a cold air curtain structure (5) located on the wire inlet side of the housing (1), with the air outlet of the cold air curtain structure (5) forming an angle of 25-40° with the wire core axis. This invention has the characteristics of effectively improving irradiation uniformity and reducing thermal effects.

The present invention discloses a mist-water mixed quenching device and method for intensive hot-rolled coil continuous heat treatment, comprising a plurality of alternately arranged mist spray beams and water spray beams, and the mist spray beams and the water spray beams are distributed on the upper and lower surface sides of the hot-rolled coil steel plate; the mist spray beam is provided with a mist nozzle on one end facing the hot-rolled coil steel plate, and a compressed air pipe 1 and a water pipe on the other end; the water spray beam is provided with a water nozzle on one end facing the hot-rolled coil steel plate, and a compressed air pipe 2 on the other end; the water nozzle is arranged obliquely and forms an angle with the moving direction of the hot-rolled coil steel plate. The present invention controls the cooling speed of the strip by changing the cooling method and pressure, and realizes the quenching of steel plates with different thickness specifications.

The application discloses a fractal structure functional integration heat protection system containing composite phase change material, which comprises a fractal structure web plate fixedly arranged on the inner side of an outer plate, an inner plate fixedly arranged on the lower side of the fractal structure web plate, an intermediate partition plate fixedly arranged on the fractal structure web plate between the outer plate and the inner plate, a cavity between the intermediate partition plate and the outer plate filled with a heat insulation material, and a cavity between the intermediate partition plate and the inner plate filled with the composite phase change material. Through the synergistic effect of the nano wetting effect of the modified low-melting-point metal-based alloy and the micron-level framework of the expanded graphite, a "alloy-graphite" two-stage heat conduction network is constructed, the heat conduction coefficient is greatly improved, the heat of the fractal structure web plate can be quickly transmitted to the composite phase change material for storage, the problem of heat short circuit does not occur, the heat protection performance and temperature uniformity are improved, and a reliable guarantee is provided for the safe flight of the aircraft in the environment with serious aerodynamic heating.

The invention discloses a thermoplastic high-strength fiber covering yarn prefabricated composite material and a preparation method thereof. The preparation method provided by the invention comprises the following steps: 1) impregnating core yarns in a resin sizing agent and resin slurry, and carrying out pre-impregnation treatment to obtain high-strength fiber core yarns; wherein the material of the resin slurry is selected from at least one of polyether-ether-ketone, nylon and polypropylene; 2) covering the surface of the high-strength fiber core yarn with the yarn by using a multi-spindle knitting machine to obtain a knitted core-spun yarn; (3) weaving the weaving covering yarn through a multi-spindle weaving machine to obtain a covering yarn preset sleeve; and 4) curing the core-spun yarn preset sleeve to obtain the thermoplastic carbon fiber woven reinforced composite material. The composite material provided by the invention has the characteristics of high resin content, high structural stability and excellent interface performance, also has high flexibility, can be packaged by folding, winding, winding and the like, realizes extremely low space occupancy, is convenient to store and transport, and greatly reduces the storage and transportation cost.

The application discloses an alumina-coated aramid core-shell fiber / epoxy resin composite medium and a preparation method and application thereof, and belongs to the technical field of polymer composite media and electrical insulation materials. The application solves the problems of insufficient heat conduction performance of existing epoxy resin, easy agglomeration of traditional inorganic fillers, weak interface bonding between aramid fibers and resin, and difficult balance between heat conduction performance improvement and breakdown performance maintenance. The application constructs an alumina coating layer on the surface of aramid fibers through a precursor deposition-thermal conversion method, and then is modified by a coupling agent, and is compounded with an epoxy resin, a curing agent and an accelerator, and is subjected to vacuum degassing and gradient curing to obtain a high-heat-conduction insulation epoxy resin composite medium. The application has the advantages of simple preparation process, easily available raw materials and controllable cost, and the obtained composite medium has heat conduction performance, electrical insulation performance and mechanical performance, and can be widely applied to the fields of electronic packaging, transformer pouring insulation, high-voltage insulation components and new energy motor insulation systems.

The invention relates to the technical field of metal materials, and discloses a preparation method of a rare earth alloying modified 6061 aluminum alloy semi-solid casting material which comprises the following components in percentage by weight: 0.8-1.2% of zinc; 0.5%-0.7% of magnesium; 0.4% to 0.6% of silicon; 0.05% to 0.1% of cobalt; 0.3%-0.5% of lithium; 0.3%-0.5% of copper; 0.1%-0.3% of yttrium; 0.05% to 0.1% of molybdenum; 0.02% to 0.08% of titanium; 93%-95% of aluminum; comprising the following steps that S1, rare earth elements yttrium, molybdenum and lanthanum are mixed according to the proportion of 1: 1: (0.5-1), and rare earth composite particles with the particle size ranging from 0.01 mm to 0.03 mm are prepared through ball milling, high-temperature sintering and airflow atomization technologies; the structure uniformity and grain refinement effect of a semi-solid liquid-solid two-phase region are optimized by controlling the accurate proportion of strengthening elements and combining with the addition of rare earth composite particles.

The invention provides a silicon carbide ceramic ball preparation method, and belongs to the technical field of silicon carbide ceramic ball preparation, and the method comprises the following steps: preparing a matrix material, and preparing a silicon carbide green body ball through a method of combining low-pressure mold pressing pre-pressing and isostatic pressing final pressing; the preparation method comprises the following specific steps: (1) preparing granulation powder; (2) mold pressing and pre-pressing forming; (3) preparing an isostatic pressing auxiliary tool; (4) vacuumizing and sealing; (5) isostatic compaction; (6) sintering; and (7) post-processing. By utilizing an integrated innovative process, the preparation process of the high-performance silicon carbide ceramic ball is simplified, the production efficiency of the high-performance silicon carbide ceramic ball is improved, the yield is improved, the production cost is reduced, and the preparation method is particularly suitable for preparing the high-performance silicon carbide ceramic ball.

An on-line quenching cooling auxiliary device for extruded profiles comprises two longitudinal rails parallel to each other, an upper transverse rail is arranged at the upper ends of the longitudinal rails, a lower transverse rail is arranged at the lower ends of the longitudinal rails, and a plurality of water spraying pipelines are arranged on the longitudinal rails, the upper transverse rail and the lower transverse rail. The front end and the rear end of the water spraying pipeline are fixedly connected with rails arranged at the front end and the rear end respectively, the space between the water spraying pipeline and the rails is used for containing the extruded profile, a plurality of nozzles used for spraying cooling liquid are arranged on the pipe wall of the water spraying pipeline, and the position of the water spraying pipeline is determined according to the shape of the extruded profile. The device can accurately control the cooling speed of each part of the extruded profile with complex shape and large wall thickness difference during on-line quenching.

This application discloses a thickened steel pipe sleeve, its heat treatment method, and its application, belonging to the field of metallic materials technology. The method includes: subjecting the thickened sleeve forming part to a first-heated sleeve by quenching at a temperature of 880-900℃; subjecting the first-heated sleeve to a first-water quenching to obtain a first-water-quenched sleeve; subjecting the first-water-quenched sleeve to a second-heated quenching at a temperature of 920-940℃; subjecting the second-water-quenched sleeve to a second-water quenching to obtain a second-water-quenched sleeve; cooling the primary and secondary sleeve bodies with external spraying and internal spraying, and cooling the thickened end with external spraying, internal spraying, and supplementary water; the external spraying flow rate is 2800-3200 m³ / h; the internal spraying flow rate is 1000-1500 m³ / h; and the supplementary water flow rate is 400-600 m³ / h. 3 / h; The secondary heating and tempering treatment of the sleeve yields a thickened steel pipe sleeve. The yield strength and tensile strength deviation of the tube body and the thickened end of the thickened sleeve after heat treatment in this application are ≤30MPa.

The invention relates to the technical field of cable clamping plates, and particularly discloses a corrosion-resistant clamping plate and a preparation method and application thereof.The corrosion-resistant clamping plate is prepared from, by mass, 50-80 parts of polyadipamide, 8-10 parts of flexibilizer, 5-10 parts of epoxy resin, 1-2 parts of lubricant, 0.1-0.5 part of antioxidant, 10-20 parts of carbon fiber, 1-3 parts of maleic anhydride and 10-15 parts of glass fiber. 0.1 to 1 part of 3-aminopropyltrimethoxysilane, and 5 to 10 parts of tetrabutyl titanate. The invention further discloses a preparation method of the corrosion-resistant clamping plate. The invention further discloses application of the corrosion-resistant clamping plate in power equipment. The product has the excellent performance of high rigidity and good waterproofness, meanwhile, operation is easy, and the formed clamping plate has the advantages of being good in performance uniformity and excellent in corrosion resistance. Cable positioning can be guaranteed, cable damage is effectively avoided, and the cable fixing device is suitable for fixing aerial cables and reliable in performance.

The application discloses high-purity bearing steel and application thereof, and has the following components in percentage by mass: C 0.95%-1.05%, Si 0.45%-0.65%, Mn 0.45%-0.65%, Cr 1.10%-1.30%, trace Mo, Ni and Cu; impurities such as O≤0.0010%, S≤0.0080%, Ti≤0.0030% and Ca≤0.0010% are strictly controlled, the upper limit of single elements such as As, Sn, Sb, Pb and Bi is limited and the total amount is ≤0.035%, and the balance is iron. The application adopts medium-silicon manganese, low-chromium main alloy and super-low impurity control, greatly reduces MnS, TiN and oxide inclusions, suppresses residual element grain boundary segregation, balances low-sulfur steel cutting performance with trace calcium, and improves high-temperature hardness with trace molybdenum. After heat treatment, the hardness is ≥HRC61, the L10 fatigue life under 4.5GPa is 2.5-3 times higher than that of conventional GCr15, and high toughness and dimensional stability are combined. The application does not need precious alloy, the production process is mature, and is suitable for multi-roll cold rolling machine backing bearing, precision rolling machine supporting roller bearing and wind power main shaft bearing.

This invention discloses an aluminum alloy sheet / strip and its heat treatment method, including a solution treatment step, a graded quenching step, and an aging treatment step. The graded quenching step includes a slow cooling stage, an isothermal stage within the quenching precipitation-sensitive temperature range, and a rapid cooling stage. This invention, through graded quenching followed by slow cooling after solution treatment, isothermal treatment within the quenching precipitation-sensitive temperature range to achieve a discontinuous and discrete distribution of grain boundary precipitates, and rapid cooling, effectively reduces the internal residual stress of aluminum alloy sheets / strips with a thickness of 30-80 mm, improves corrosion resistance, and enhances the uniformity of performance in the thickness direction. The prepared aluminum alloy sheet / strip exhibits a core tensile strength not less than 90% of the surface tensile strength, a surface residual compressive stress greater than 50 MPa, and intergranular corrosion resistance reaching PC level, demonstrating excellent overall performance.

The invention discloses a conductive silicon carbide crystal with good optical path difference uniformity and a silicon carbide substrate, and belongs to the technical field of silicon carbide material preparation. The resistivity at any position of the silicon carbide crystal is lt; the thickness is 30 m omega.cm; 1-N silicon carbide substrates are prepared from the silicon carbide crystal, N is a positive integer and represents the serial number of the silicon carbide substrates, the value of the first silicon carbide substrate including the first end face from the silicon carbide crystal is 1, the optical path difference of any silicon carbide substrate meets the following formula: = a (N-1) + b, the unit is nm, the value range of a is-0.8 to 0.8, the value range of b is-0.8 to-0.8, and the value range of b is-0.8 to-0.8. The value of b is 0.5-8, and the unit is nm. According to the conductive silicon carbide crystal, the uniformity of the optical path difference can be improved while the conductivity is improved, so that the commercial use requirement of a conductive silicon carbide substrate is met.

The invention discloses a yield and efficiency increasing method for a high-strength automobile sheet. The method comprises the following steps of smelting, continuous casting, hot rolling, acid pickling and cold rolling and continuous annealing. Molten steel components obtained through smelting keep away from a sub-peritectic zone sensitive to cracks; in the continuous casting step, corners are not cleaned after casting blanks are offline; in the hot rolling step, a casting blank is subjected to hot charging rolling; in the continuous annealing step, a long slow cooling type continuous annealing unit with a slow cooling section of 50-60 m and a rapid cooling section of 14-18 m is adopted; the soaking temperature of annealing is 790 + / -20 DEG C, and the in-furnace strip steel speed, slow cooling temperature, rapid cooling temperature, overaging temperature and flattening elongation are designed according to different strip steel thicknesses; through reasonable component process design, a sub-peritectic region sensitive to cracks is effectively avoided, and corner cracks of a casting blank are reduced; and the speed-increasing bottleneck of excessive slow cooling capacity and insufficient rapid cooling capacity is broken, so that the efficiency can be improved, and the yield can be increased.

The present invention provides a pre-lithiated silicon oxide negative electrode material and a preparation method thereof, and relates to the technical field of silicon negative electrode material preparation. The core of the pre-lithiated silicon oxide negative electrode material includes an amorphous silicon oxide containing a lithium silicate phase, and the outer surface of the core is uniformly covered with a hydrophobic conductive carbon layer and a hydrophilic carbon layer in sequence, and a hydrophobic inorganic substance is uniformly dispersed between the hydrophobic conductive carbon layer and the hydrophilic carbon layer. The pre-lithiated silicon oxide negative electrode material and metallic lithium form a half-cell for electrochemical performance testing, the test rate is 0.1C (first time) + 0.5C (cycle), the charge and discharge voltage is 0.005-1.5V, the discharge specific capacity of the negative electrode plate can reach 1630-1730mAh / g, the first efficiency is 89.0%-92.0%, and after 50 cycles, the capacity can still be maintained at 89.9%-90.9%.

The invention relates to the technical field of metal plate forming, in particular to a shape collaborative manufacturing method of a ribbed integral wallboard, which comprises the following steps: manufacturing a cylindrical ribbed wallboard slab by adopting an extrusion mode, and splitting the cylindrical ribbed wallboard slab along the axial direction to obtain a large-curvature wide slab; and carrying out heat treatment forming on the large-curvature wide plate blank by utilizing a creep age forming process to obtain the integral ribbed panel. The shape collaborative manufacturing method of the ribbed integral wall plate aims to solve the problem that the structure property and the shape precision of the ribbed integral wall plate are difficult to meet the use requirements at the same time.

The utility model discloses a battery thermal management system with embedded composite cold plates, which relates to the technical field of cooling systems and comprises a plurality of battery thermal management units, and each battery thermal management unit comprises a battery module and two composite cold plates. Specifically, the battery module comprises a plurality of square lithium batteries, and the plurality of square lithium batteries are horizontally stacked; the two composite cold plates are respectively arranged on two opposite sides of the square lithium battery, one side of each composite cold plate, which is connected with the square lithium battery, is provided with a liquid cooling flow channel and a phase change material cavity, cooling liquid circulates in the liquid cooling flow channels, and the phase change material cavity is provided with a phase change material. The utility model has good leak-proof capability and cooling performance.

The invention relates to an ultra-thick, ultra-high-strength steel for large-scale hydropower engineering and a manufacturing method thereof. The chemical components of the steel are C: 0.10%-0.15%; Si: 0.06%-0.10%; Mn: 0.90%-1.50%; P≤0.008%; S≤0.001%; ​​Ni: 1.75%-2.4%; Cr: 0.55%-0.75%; Mo: 0.75%-1.2%; Ti: 0.07%-0.11%; N: 0.015%-0.025%; CeO2: 0.10%-0.20%; Al: 0.02%-0.04%; [H]≤1.5ppm; [O]≤8ppm; the remainder is Fe and impurities. The steel is designed with low carbon, low manganese, Ni+Cr+Mo+Ti low alloying composition, combined with electroslag remelting + rolling + offline tempering heat treatment process, and utilizing the grain refinement effect of high melting point Ti (CN) and CeO2 to achieve high permeability rolling production of thick electroslag billets, and finally obtain ultra-thick and ultra-high strength steel plates with a grain size of 7.5 or above, a thickness of 110 to 160 mm, and 1000 MPa.

The invention discloses a manufacturing method of a composite ceramic electrostatic chuck, which comprises the following steps of: 1, providing a ceramic cast sheet, and printing a metal electrode to obtain a first cast sheet; 2, high-dielectric-strength ceramic powder, an organic solvent, a dispersing agent, a binding agent and a plasticizer are mixed, high-dielectric-strength tape casting slurry is prepared, and the high-dielectric-strength ceramic powder comprises any one of tantalum pentoxide and hexagonal boron nitride; step 3, printing the high dielectric strength tape casting slurry at the gap to obtain a second tape casting sheet; and 4, covering the upper surface of the second cast sheet with a ceramic cast sheet, and carrying out lamination molding. According to the composite ceramic electrostatic chuck manufactured by the invention, the gap can be reduced under the condition that the ceramic casting sheet is not broken down at high voltage, meanwhile, the adsorption area of the electrode and the wafer can be increased, and the adsorption force to the wafer is improved, so that the heat dissipation performance and the temperature uniformity of the wafer are effectively improved.