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27results about How to "Avoid phase change" patented technology

Gas test method for marine liquefied carbon dioxide liquid cargo system

The invention belongs to the field of liquefied gas ships, and particularly relates to a gas test method of a liquefied carbon dioxide liquid cargo system for a ship. Comprising the following steps: drying a cargo hold space; liquid cargo tank and pipeline drying; pressurizing a liquid cargo pipeline; liquid cargo tank gas replacement; pressurizing the liquid cargo tank and the ventilation system; a liquid cargo tank cold tank; loading in a liquid cargo tank; testing the liquid cargo pump; unloading the liquid cargo tank; sweeping the liquid cargo tank; discharging the loading pipeline; heating the liquid collecting well; heating and ventilating the liquid cargo tank. According to the invention, the gas test process of the marine liquefied carbon dioxide liquid cargo system is simplified, and the operation efficiency is improved; before the liquid cargo tank gas replacement, pressurization and tank cooling are carried out, all the liquid phase pipelines are pressurized through dry gas, the gas test of the marine liquefied carbon dioxide liquid cargo system is carried out under the semi-cooling and semi-pressure condition, and the efficiency and safety of gas test operation are improved.
Owner:DALIAN SHIPBUILDING INDUSTRY CO LTD

Preparation method of TiO2-coated SiO2 material

The invention relates to a preparation method of a TiO2-coated SiO2 material, and relates to the technical field of nano materials, and the preparation method is characterized by comprising the following steps: modifying titanium dioxide nanoparticles by using CTAB (Cetyltrimethyl Ammonium Bromide), then adding TEOS (Tetraethyl Orthosilicate) into a mixture to complete a silicon dioxide coating reaction, and then calcining to obtain a densified TiO2-coated SiO2 material; cTAB (cetyltrimethylammonium bromide) is used as a template agent and a surfactant to help to form a uniform SiO2 coating layer, the dispersity of TiO2 particles in a reaction medium is improved, the agglomeration of the TiO2 particles is prevented, and the SiO2 coating layer enhances the absorption of visible light, increases the specific surface area of the material and provides more active sites, so that the photocatalytic efficiency of the material is improved.
Owner:YUNNAN NORMAL UNIV

Precise cutting device for thin-wall pipe fitting and anti-deformation cutting method

The invention discloses a thin-wall pipe fitting precise cutting device and an anti-deformation cutting method, and relates to the technical field of thin-wall pipe fitting production.The thin-wall pipe fitting precise cutting device comprises an equipment base, a fixing frame is installed on the equipment base, auxiliary supporting pieces are installed on the upper surface of the equipment base and the upper end of the fixing frame correspondingly, and the auxiliary supporting pieces are used for clamping a thin-wall pipe fitting in a rolling mode; a lifting driving frame is fixed to the rear side of the equipment base, a cutting knife is vertically installed on the lifting driving frame in a lifting mode, the main shaft, the fixed supporting sleeve and the adjusting supporting sleeve are arranged and used in cooperation with an opposite-pulling assembly and an auxiliary supporting piece, the fixed supporting sleeve and the adjusting supporting sleeve can support a cut part of a thin-wall pipe fitting in a mode of being attached to a cutting point, and therefore the thin-wall pipe fitting can be cut conveniently. Concave deformation of the thin-wall pipe fitting is avoided when the thin-wall pipe fitting is cut. In addition, the worker can adjust the distance between the fixed supporting sleeve and the adjusting supporting sleeve according to the wall thickness of the thin-wall pipe fitting, the optimal supporting effect of the cutting point of the thin-wall pipe fitting is achieved, and the finished product percent of pass of the cut thin-wall pipe fitting is guaranteed.
Owner:JIANGSU CHANGBAO PLS STEEL TUBE

Water-resistant and sulfur-resistant monolithic catalyst as well as preparation method and application thereof

The invention belongs to the technical field of catalyst preparation, and provides a water-sulfur-resistant monolithic catalyst and a preparation method and application thereof.The preparation method comprises the following steps that a carrier is placed in composite slurry, calcination is conducted after dipping is completed, the carrier containing a protective coating is obtained, and the composite slurry comprises titanium dioxide and a lanthanum nitrate-silica sol compound; s2, putting the carrier containing the protective coating obtained in the step S1 into a non-noble metal additive compound solution, and calcining after dipping to obtain a carrier containing a non-noble metal additive coating; and spraying Pd-coated SiO2 precursor aerosol on the carrier surface of the non-noble metal auxiliary agent coating obtained in the step S2, and calcining to obtain the water-sulfur-resistant monolithic catalyst. According to the preparation method, the catalytic performance and the stability of the catalyst are improved, and the preparation cost is reduced.
Owner:ANHUI ORIENTAL LICHUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD

Conductive adhesive tape and perovskite solar cell

The utility model relates to the field of photovoltaic technology, and specifically provides a conductive adhesive tape and a perovskite solar cell. The conductive adhesive tape comprises a base material layer, a grid conductive layer and a conductive adhesive filling layer, the grid conductive layer and the conductive adhesive filling layer are located on the surface of one side of the base material layer, the grid conductive layer is of a grid-shaped structure and arranged on the surface of the base material layer, and meshes of the grid-shaped structure are filled with the conductive adhesive filling layer. The conductive adhesive tape disclosed by the utility model can be widely applied to the field of building integrated photovoltaics; secondly, the conductive adhesive tape is applied to the perovskite solar cell, and the surface of one side of the substrate layer is provided with a first area, a second area and a third area; and the conductive adhesive tape is arranged on the surface of one side, far away from the substrate layer, of the transparent conductive layer in the first region and the second region, and the conductive adhesive layer and the cell layer are arranged at an interval, so that the electrical property and reliability of the perovskite solar cell are high.
Owner:WUXI UTMOST LIGHT TECH CO LTD

Heat treatment process for strengthening and toughening TC18 titanium alloy

The invention discloses a heat treatment process for strengthening and toughening a TC18 titanium alloy. The process comprises the following steps: step 1, heating the TC18 titanium alloy to 450-550 DEG C for preheating; secondly, the preheated TC18 titanium alloy is heated to 980 DEG C to 1020 DEG C for solution treatment; thirdly, the TC18 titanium alloy subjected to solution treatment is subjected to water quenching; and fourthly, the TC18 titanium alloy subjected to water quenching is subjected to tempering treatment, and the toughened TC18 titanium alloy is obtained. According to the process, the beta phase of the TC18 titanium alloy is subjected to water quenching after being subjected to solid solution treatment, so that the beta phase is converted into a martensite structure, the strength and toughness of the TC18 titanium alloy are improved, then the residual stress of the TC18 titanium alloy is reduced through tempering treatment, the toughness of the TC18 titanium alloy is further improved, and the process is suitable for the technical field of titanium alloy heat treatment and machining and manufacturing.
Owner:XIAN DAFU AEROSPACE TECH CO LTD

Perovskite solar cell

The utility model relates to a divisional application of which the application number is 202420109196.7. The utility model relates to the field of photovoltaic technology, in particular to a conductive adhesive tape and a perovskite solar cell. The conductive adhesive tape comprises a base material layer, a grid conductive layer and a conductive adhesive filling layer, the grid conductive layer and the conductive adhesive filling layer are located on the surface of one side of the base material layer, the grid conductive layer is of a grid-shaped structure and arranged on the surface of the base material layer, and meshes of the grid-shaped structure are filled with the conductive adhesive filling layer. The conductive adhesive tape disclosed by the utility model can be widely applied to the field of building integrated photovoltaics; secondly, the conductive adhesive tape is applied to the perovskite solar cell, and the surface of one side of the substrate layer is provided with a first area, a second area and a third area; and the conductive adhesive tape is arranged on the surface of one side, far away from the substrate layer, of the transparent conductive layer in the first region and the second region, and the conductive adhesive layer and the cell layer are arranged at an interval, so that the electrical property and reliability of the perovskite solar cell are high.
Owner:WUXI UTMOST LIGHT TECH CO LTD

Smooth digital gain control device and method

PendingCN121984464ASolve the accuracy problemavoid phase changeGain controlNoiseControl cell
The invention relates to a smooth digital gain control device and method. The device comprises an analog switch gain adjusting module, a digital gain adjusting module, a zero-cross detection module, a gradual-gradual-out control module, a central control unit and an audio signal input / output interface. The method comprises the steps that when the FPGA receives an external gain adjusting instruction, an analog coarse adjustment gear and a digital fine adjustment value corresponding to target gain are calculated, after a zero-crossing trigger signal of the zero-crossing detection module is received, the gradual-gradual-out control module is controlled to execute the gain adjusting action, and the analog switch gain adjusting module is controlled through IO according to the current actual gain value. According to the invention, the analog switch and digital gain adjustment are combined, the 0-66dB wide range and 0.1 dB high precision gain adjustment is realized, the zero-cross detection and gradual-gradual-out mechanism is added, the noise caused by gain change is eliminated, and the stability and the tone quality of audio signal processing are improved.
Owner:DONGGUAN MEIPAI ELECTRONIC TECH CO LTD

A method for resource utilization of a transformed condensate

The present application relates to a kind of transformation condensate resource utilization method.The method includes the following steps: S1, after mixing with sulfuric acid, the transformation condensate is carried out decarburization treatment, and the crude ammonium sulfate solution is obtained;S2, under the action of catalyst, the crude ammonium sulfate solution is reacted with oxidizing agent, and the refined ammonium sulfate solution is obtained;Oxidizing agent includes one or more of hydrogen peroxide, ozone and persulfate.The method of the present application is suitable for different scale transformation condensate treatment process, and has the following characteristics: waste material recycling, recovery rate is more than 99.0%, product added value is high, and economic benefit is good;Avoid the phase change process of water, and energy consumption is less, energy saving and emission reduction;Process flow is simple, and processing efficiency is high;Avoid secondary pollution;Help coal chemical industry enterprise to realize plant material self circulation, and generate good economic benefit by-product.
Owner:SHANGHAI KAIXIN ISOLATION TECH CO LTD

A method for laser-arc composite in-situ cladding of boiler heating surfaces

ActiveCN122081938ASolve the deformationSolve the problem of easy cracking in laser cladding
This invention discloses a method for in-situ laser-arc composite cladding of boiler heating surfaces, relating to the field of laser beam processing technology. The method includes: removing the corrosion layer and oxide film from the area to be repaired using dry ice blasting and laser; maintaining water cooling on the back side of the area to be repaired; pausing after each cladding section to allow the interlayer temperature to drop to 200℃-250℃; sequentially cladding the underlayer, transition layer, and wear-resistant layer; after each cladding layer is completed, the surface is treated with laser shock peening; when an abnormal enhancement of the Fe I spectral line at 435.2 nm is observed, it is determined to be "excessive dilution"; when a high-frequency burst signal of 80kHz-120kHz appears in the acoustic emission signal, it is determined to be "microcrack formation". This invention enables rapid repair of large-area heating surfaces with high bonding strength, low heat input, and no cracks, under in-situ boiler conditions without disassembly, overall preheating, and with a cooling medium on the back side.
Owner:SICHUAN DONGFANG BOILER IND BOILER GRP CO LTD

A high-toughness magnesium alloy powder making device and preparation method thereof

A high-toughness magnesium alloy powder making device and a preparation method thereof, which relates to a powder making device and a preparation method thereof. The present invention is to solve the problems of easy plastic deformation, low powder yield and decreased hydrogen storage performance of magnesium alloy powder in the existing preparation of magnesium alloy powder. The present invention drives the gear set to rotate through a motor, driving the grinding disc and the driven gear to rotate coaxially, so as to achieve the effect of adjustable grinding disc speed during grinding. The grinding disc feed is controlled by a hydraulic lifting device, and the feed amount and feed speed are set according to the required amount of powder or the height of the sample exposed in the slot. The device sets the grinding disc to the lowest position and still reserves a safe distance from the slot. Put the magnesium alloy sample into the concave position of the base and determine the height of the sample exposed in the slot, evacuate; introduce protective gas; start the circulating water pump of the cooling system; adjust the grinding disc height to grind and collect the powder. The present invention is used for high-toughness magnesium alloy powder making.
Owner:HARBIN INST OF TECH

An iron-based multimetallic catalytic material, its preparation method and application

This invention discloses an iron-based multimetallic catalytic material, its preparation method, and its application, belonging to the field of catalyst preparation technology. The preparation method includes: dissolving two or more water-soluble metal salts with different hydroxide solubility products in water to obtain a mixed solution A; dissolving potassium ferrate in cold water to obtain solution B; pouring solution B into mixed solution A under stirring to obtain mixed solution C; allowing the solution to settle at low temperature until the supernatant changes color from dark purple to light purple and reaches neutral pH, then filtering, washing, and drying to obtain a precursor; calcining the precursor in a mixed atmosphere of hydrogen and argon to obtain the iron-based multimetallic catalytic material. This material has a multi-layered enclosed microstructure, with metal oxides of high hydroxide solubility products located on the periphery and those of low solubility products located inside, achieving a gradient arrangement and synergistic effect of metal components. The process of this invention is simple and the conditions are mild. The obtained catalyst exhibits high catalytic activity, high selectivity, and excellent stability in the countercurrent water-gas reaction.
Owner:SOUTH CHINA UNIV OF TECH

Composite sealing material for medium-temperature solid oxide fuel cell as well as preparation method and application of composite sealing material

The invention discloses a composite sealing material for a medium-temperature solid oxide fuel cell as well as a preparation method and application of the composite sealing material, and belongs to the technical field of solid oxide fuel cell materials. The defects that strengthening phase particles are not uniformly distributed in a glass matrix and are easy to agglomerate are successfully overcome by matching mortar mixing with ultrasonic concussion; the preparation method effectively prevents the t-ZrO2 nano strengthening phase in the composite glass from phase change in the preparation process, keeps the original tetragonal crystal structure of t-ZrO2 in the glass, and is beneficial to exerting the phase change toughening characteristic of the t-ZrO2 strengthening phase. Based on the preparation process, the phase change toughening characteristic of the t-ZrO2 ceramic particles is fully utilized, the problems that the sealing glass is high in brittleness and easy to crack are effectively solved, and the composite sealing glass material with high fracture toughness and low brittleness is obtained. In addition, by optimizing the composite sealing material, the connection quality of the joint is remarkably improved, and the load resistance and long-term stability of the solid oxide fuel cell stack are favorably improved.
Owner:CHONGQING UNIV

Iron-based multi-metal catalytic material as well as preparation method and application thereof

The invention discloses an iron-based multi-metal catalytic material as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: dissolving more than two metal water-soluble salts with different hydroxide solubility products in water to obtain a mixed solution A; dissolving potassium ferrate in cold water to obtain a solution B; pouring the solution B into the mixed solution A while stirring to obtain a mixed solution C; after the color of the supernate becomes light purple from dark purple and the pH is neutral, suction filtration, washing and drying are performed, and a precursor is obtained; and calcining in a mixed atmosphere of hydrogen and argon to obtain the iron-based multi-metal catalytic material. The material is of a multi-layer surrounding type microstructure, metal oxides with high hydroxide solubility products are located on the periphery, metal oxides with low hydroxide solubility products are located inside, and gradient arrangement and synergistic effect of metal components are achieved. The method is simple in process and mild in condition, and the obtained catalyst shows high catalytic activity, high selectivity and excellent stability in the reverse water gas reaction.
Owner:SOUTH CHINA UNIV OF TECH

A water-sulfur resistant monolithic catalyst and its preparation method and application

The present invention belongs to the technical field of catalyst preparation, and provides a water-resistant sulfur monolithic catalyst and its preparation method and application, comprising the following steps: placing a carrier in a composite slurry, calcining after impregnation, and obtaining a carrier containing a protective coating, wherein the composite slurry comprises a titanium dioxide and a lanthanum nitrate-silicon sol composite; placing the carrier containing the protective coating obtained in step S1 in a non-precious metal additive compound solution, calcining after impregnation, and obtaining a carrier containing a non-precious metal additive coating; spraying a Pd@SiO2 precursor aerosol on the carrier surface of the non-precious metal additive coating obtained in step S2, and then calcining to obtain a water-resistant sulfur monolithic catalyst. The preparation method of the present invention improves the catalytic performance and stability of the catalyst and reduces the preparation cost.
Owner:ANHUI ORIENTAL LICHUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD

Aluminum ethoxide composite polymer electrolyte membrane, preparation method of aluminum ethoxide composite polymer electrolyte membrane, application of aluminum ethoxide composite polymer electrolyte membrane in battery and assembly process of battery

The invention relates to the technical field of chemical batteries, in particular to an aluminum ethoxide composite polymer electrolyte membrane, a preparation method of the aluminum ethoxide composite polymer electrolyte membrane, application of the aluminum ethoxide composite polymer electrolyte membrane in a battery and an assembly process of the battery. The aluminum ethoxide composite polymer electrolyte membrane comprises a polymer and aluminum ethoxide, the structure of the polymer contains ester groups or / and ether bonds; the polymer is polyethylene oxide or a polyethylene oxide derivative; the polyethylene oxide derivative is obtained by carrying out photopolymerization on a small molecular monomer. When the aluminum ethoxide composite polymer electrolyte membrane is applied to a battery, the interfacial compatibility is enhanced, rapid and ordered transmission can be realized, and the cycling stability is good.
Owner:SUN YAT SEN UNIV

Sampling device for collecting dense gas sample

The invention relates to the field of sampling detection, and discloses a sampling device for collecting a dense gas sample, the sampling device comprises a communicating pipe, a sampling pipe, a buffer tank and a sampler, one side of the buffer tank is communicated with the communicating pipe, a pressure valve is arranged in the communicating pipe, and the other side of the buffer tank is communicated with the sampler through the sampling pipe; the sampler comprises a tank body part and a tank opening part arranged on the tank body part, a piston body is arranged in the tank body part in a sliding mode, the bottom of the tank body part is an opening, the sampler further comprises a bottom plate detachably connected with the opening in the bottom of the tank body part, and the two ends of a first spring abut against the piston body and the bottom plate respectively. The sampling device provided by the invention can be used for rapidly and temporarily storing and sampling dense gas.
Owner:BAILEY INTELLIGENT EQUIP (ZHANGJIAGANG) CO LTD

Off-axis crystal growth device

The present invention provides an off-axis crystal growth device, which belongs to the field of semiconductor technology, and includes a sealed chamber, a lower crucible and an upper crucible. The lower crucible is arranged in the sealed chamber and is used to hold silicon carbide powder. The top of the lower crucible is provided with a gas phase outlet. The bottom of the upper crucible is open and a seed crystal is arranged on the inner side of the top. The seed crystal is arranged coaxially with the upper crucible. The outer side of the top of the upper crucible is connected to a driving mechanism for rotating around its own axis under the drive of the driving mechanism. The upper crucible is arranged in the sealed chamber and is spaced apart from the lower crucible in the vertical direction. The axis of the upper crucible is spaced apart from the axis of the lower crucible in the horizontal direction. By adopting a split off-axis upper crucible and a lower crucible, and arranging the upper crucible to rotate around its own axis under the drive of the driving mechanism, the growth surface of the crystal can maintain a stable convex interface during the growth process, thereby reducing the defects of the silicon carbide crystal and improving the quality of the silicon carbide crystal.
Owner:TONGWEI MICROELECTRONICS CO LTD

In-situ doped TiO2 core-shell structure powder with a wide particle size range, its preparation method and application

PendingCN122076475AHighly integrated processavoid phase changeWater/sewage treatment by irradiationWater contaminantsPhotocatalytic degradationTitanic acid
This application discloses an in-situ doped TiO2 core-shell structure powder with a wide particle size range, its preparation method, and its applications. The powder has a rutile core@anatase shell structure, with dopant elements enriched in the shell through chemical bonding. The preparation method utilizes an integrated "alkali treatment-acid treatment-low-temperature crystallization" process: rutile phase TiO2 is embedded with cation dopant via an alkaline hydrothermal reaction to form an alkali metal titanate shell; then, acid treatment replaces the anion dopant to construct a hydrotitanate shell; finally, low-temperature calcination yields the core-shell structure. This technology utilizes a dynamic surface reconstruction window to simultaneously integrate doping, overcoming particle size limitations (nanometer to centimeter scale). The resulting material exhibits highly efficient photocatalytic degradation performance of organic pollutants in water under visible light, making it suitable for engineering applications. Its innovation lies in simultaneously completing structure construction, doping integration, and crystallization, avoiding the complexity and defects of step-by-step processes, combining technological advancement with practicality.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Heat leakage compensation method for low-temperature storage tank

The invention relates to the field of ultralow-temperature medium storage, in particular to a low-temperature storage tank heat leakage compensation method which comprises the steps that the heat leakage amount of a storage tank is obtained, the relation that the heat leakage amount is equal to the refrigerant heat absorption amount to maintain no phase change of media in the storage tank is achieved, the refrigerant flow is calculated, and the minimum heat exchange area is calculated according to the refrigerant flow. A heat exchange structure is arranged in the storage tank through the minimum heat exchange area, the effect of balancing heat absorption of a medium in the storage tank is achieved, a heat dissipation structure comprises a heat exchange pipe network, a refrigerant tank and a recovery tank, an extraction pump is arranged at an inlet, the pumping flow of the extraction pump is the calculated refrigerant flow, and the contact area of the heat exchange pipe network and a storage medium in the storage tank is the calculated heat exchange area. By means of the structural design, the effect of cooling the medium through the refrigerant supplementing agent in the heat absorption process of the medium in the storage tank can be achieved, and the situation that the medium is subjected to phase change, and consequently cost waste is caused is avoided.
Owner:SHAANXI RONGKE CRYOGENIC EQUIP CO LTD

An ultrasonic vibration electrolytic grinding composite spindle component

This invention discloses an ultrasonic vibration electrolytic grinding composite spindle component in the field of grinding composite spindle technology, comprising an insulating shell; a hollow spindle rotor; an ultrasonic vibration mechanism connected to the hollow spindle rotor and used to generate and transmit axial ultrasonic vibration; a rotary drive device for driving the hollow spindle rotor and the ultrasonic vibration mechanism to rotate together; and an electrolysis mechanism including a conductive slip ring and an electrolyte delivery assembly, the electrolyte delivery assembly being used to deliver electrolyte to the grinding area at the front end of the hollow spindle rotor; wherein, the first electrical channel of the conductive slip ring is electrically connected to the ultrasonic vibration mechanism for transmitting high-frequency electrical signals; the second electrical channel of the conductive slip ring is electrically connected to the tool mounting end of the hollow spindle rotor for transmitting direct current for electrolytic machining. This composite spindle component, by integrating ultrasonic vibration, electrolytic machining, and high-speed grinding processes, overcomes the fundamental technical bottlenecks of low material removal rate, severe thermal damage, and rapid tool wear in traditional single ultrasonic grinding.
Owner:YANGZHOU POLYTECHNIC INST

A preparation method of β"-alumina

The invention discloses a method for preparing β″-alumina, and belongs to the technical field of alumina production. The invention utilizes the synergistic effect of modified α-alumina and modified θ-alumina, combined with sodium salt, to promote the transformation of crystal form during sintering, so that the formation of β″-alumina is more stable and has high purity. At the same time, alcohol wet grinding and the use of dispersants and stabilizers are adopted to ensure the uniformity and stability of ball mill slurry, effectively prevent particle agglomeration and precipitation, and improve the preparation efficiency and product quality of β″-alumina. In addition, during calcination, under the protection of nitrogen atmosphere, the preparation process of pre-sintering and main sintering is adopted to ensure the crystalline integrity of the material at high temperature, avoid unnecessary phase change and impurity generation, and obtain β″-alumina with excellent performance.
Owner:ZIBO HONGHAO CRYSTAL MATERIALS CO LTD

Shape control method for casing forge piece for large gas turbine

The invention relates to a shape control method for a casing forge piece for a large gas turbine. The shape control method comprises the following steps that S1, blanking is conducted; step S2, chamfering is carried out; s3, upsetting and punching are carried out; s4, cooling after forging; s5, primary annealing is conducted, and heat preservation is conducted on the forged piece at the temperature of 690 + / -40 DEG C; s6, trestle chambering is conducted, and the forging temperature ranges from 900 DEG C to 1150 DEG C; s7, secondary annealing is conducted, specifically, the forged piece is annealed and subjected to heat preservation, and the annealing temperature is 690 DEG C + / -40 DEG C; step S8, normalizing: normalizing the forge piece and preserving heat at the normalizing temperature of 1130 + / -5 DEG C; s9, primary tempering is conducted, specifically, the forge piece is tempered and subjected to heat preservation, and the tempering temperature is 760 + / -5 DEG C; s10, quenching is conducted, specifically, the forge piece is quenched, and the quenching temperature is 1120 + / -5 DEG C; s11, secondary tempering is conducted, specifically, the forge piece is tempered, and the tempering temperature is 680 + / -5 DEG C; and S12, stress relief annealing is conducted, and the stress relief annealing temperature is 630 + / -5 DEG C. The method has the advantages that the performance stability is improved, and the cracking phenomenon of the product caused by stress concentration is avoided to the maximum extent.
Owner:WUXI PAIKE HEAVY CASTING & FORGING

Preparation and use method of chitosan oligosaccharide antifreeze agent

The invention relates to the technical field of agricultural production, and particularly discloses a preparation and use method of a chitosan oligosaccharide antifreeze agent, the antifreeze agent comprises the following components by weight: 1-3 g / L of potassium dihydrogen phosphate, 0.01-0.03 mg / L of brassinolide, 0.5-1 g / L of amino acid, 25-50 mg / L of chitosan oligosaccharide powder (10%), 0.01-0.04 mg / L of glutamic acid, 0.01-0.04 mg / L of lysine, 0.2-0.4 mg / L of pyruvic acid, 0.1-0.2 mg / L of citric acid, 0.01-0.02 mg / L of glycerin, 20-50 g / L of an emulsifier, and the balance of water. 10-20 g / L of SiO2 nano-particles and a trace element fertilizer; according to the invention, through cooperation of the elements in the agent, on the basis of supplementing nutrient elements of plants, the lignification degree of the plants is enhanced, the freezing resistance of the plants is enhanced, the plants are induced to generate stress resistance, the SiO2 nanoparticles are added, so that the anti-freezing agent is adsorbed in the nanoparticles, slow release of the drug effect of the anti-freezing agent can be realized, and the anti-freezing effect of the plants is improved. The pesticide effect timeliness after single-time spraying of the anti-freezing agent is prolonged.
Owner:QINGDAO SANHUANG AGRI TECH CO LTD

Hydrogen storage and compression system

A hydrogen storage and compression system includes a hydrogen storage and compression device and a thermal management system. The apparatus includes a housing and a plurality of storage and compression units mounted within an interior chamber of the housing. Each storage and compression unit includes a container for hydrogen storage and compression and a metal hydride contained within the container. The vessel is interconnected with the hydrogen inlet and the hydrogen outlet through a hydrogen circuit flow system for connection to a hydrogen consuming device and a hydrogen source. The thermal management system includes a hot liquid circuit system and a heat exchanger system. The circuit system includes a closed-loop hot liquid flow circuit, a hot liquid flowing within the flow circuit, and a pump for pumping the hot liquid. A flow circuit is connected to the liquid inlet and the liquid outlet of the housing for flowing a hot liquid through an interior chamber of a container surrounding the storage and compression unit for cooling or heating the storage and compression unit. The flow circuit is coupled to a first heat exchanger connected to a heating source and a second heat exchanger connected to a cooling source.
Owner:HYUNDAI MOTOR CO LTD +2

Pipe pressure plugging method based on in-situ growth of metal and application thereof

This invention discloses a method for live pipeline leak sealing based on in-situ metal growth and its application, belonging to the field of online repair technology for pressurized pipelines. The method includes: pre-treatment of the leaking area; forming a repair layer consisting of a metal transition layer and a metal-ceramic composite layer in the leaking area using low-temperature solid-state deposition technology without interrupting pipeline operation; and finally, post-treatment of the repair layer by shot peening and low-temperature laser polishing to improve its density and surface properties. This invention employs low-temperature processes such as cold spraying, completely avoiding the risks of hot work operations and achieving safe and efficient repair under pressurized pipeline conditions. The gradient functional repair layer formed by this invention has high bonding strength with the pipeline substrate and excellent corrosion resistance and erosion resistance, making it particularly suitable for repairing pressurized pipeline leaks in the power, chemical, and marine engineering fields where continuous production is required.
Owner:WUHAN UNIV

Battery current collector surface micropore processing equipment

The invention relates to the technical field of battery current collector processing, in particular to battery current collector surface micropore processing equipment which comprises an unwinding unit, a processing unit and a winding unit which are sequentially arranged along a processing path, the processing unit comprises a surface pretreatment device used for carrying out plasma treatment on the surface of the current collector; the micropore electrolysis device is arranged at the downstream of the surface pretreatment device and is used for carrying out electrolytic machining on the current collector subjected to plasma treatment so as to form micropores; and the post-treatment device is arranged at the downstream of the microporous electrolysis device and is used for cleaning and drying the current collector subjected to electrolytic machining. Therefore, the problems of poor machining precision, low production efficiency, high implementation cost and unstable product quality of a current collector surface micromachining technology in the prior art to different degrees can be solved.
Owner:RONGENE NEW MATERIALS (BEIJING) TECH CO LTD