272 results about "Hydrogen content" patented technology

The invention provides an acoustic coalescence elimination method for hydrogen bubbles in molten aluminum, and belongs to the technical field of molten aluminum bubble elimination. According to the method, sound field collaborative focusing is achieved by arranging a phase control array transducer set in a molten aluminum smelting furnace, primary gathered sound waves and efficient coalescence sound waves are applied in stages according to bubble size evolution in a double-frequency scanning mode, and the hydrogen bubbles in the molten aluminum are eliminated. A target frequency is dynamically adjusted in combination with a bubble resonance frequency optimization model to match the inherent frequency of a bubble, a sound-bubble coupling dynamic tracking system is used for monitoring bubble evolution triggering stage switching in real time, and a sound field focus point dynamically scans and covers a three-dimensional space area through phase delay control. A delay detection method is adopted to eliminate cavitation bubble interference and accurately measure the hydrogen content, sound intensity and frequency parameters are optimized according to a sound field parameter self-adaptive regulation and control model, and the technical problem that hydrogen bubbles in a molten aluminum deep area are difficult to be effectively driven by sound waves and cannot be fully coalesced and eliminated is solved.

The application provides a crystallizer protection slag for casting high-hydrogen-content medium-carbon steel liquid steel and application thereof, wherein the chemical composition of the crystallizer protection slag has the following mass percentages: SiO2: 25-32%, CaO: 29-36%, Al2O3: 1-4%, MgO: 3-6%, Na2O: 7-12%, F: 6-10%, C 总 : 3-6%, MnO: 2-4%, Li2O: 0.5-1%, and the rest is other inevitable impurities. The crystallizer protection slag can significantly reduce the occurrence rate of crystallizer sticking alarm emergency speed reduction and the occurrence rate of leakage during continuous casting when used for casting high-hydrogen-content medium-carbon steel liquid steel. Thus, the high-hydrogen-content medium-carbon steel liquid steel can be directly subjected to continuous casting without additional dehydrogenation treatment, the production efficiency is improved, and the production cost is solved.

The invention discloses a rolling manufacturing method of low-decarburization medium-chromium round steel for a caterpillar track link and a product of the rolling manufacturing method, and belongs to the technical field of alloy steel rolling. The method comprises the following steps: smelting molten steel, wherein the molten steel comprises the following components in percentage by mass: 0.28-0.34% of C, 0.15-0.35% of Si, 0.50-0.85% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 0.80-1.10% of Cr, less than or equal to 0.30% of Ni, 0.10-0.30% of Mo, less than or equal to 0.30% of Cu, 0.010-0.060% of Al and the balance of Fe and impurities; lF refining, RH vacuum degassing (the time is longer than or equal to 20 min, and the hydrogen content is smaller than or equal to 1.5 ppm), electromagnetic stirring continuous casting (the superheat degree is 15-25 DEG C), slow cooling (longer than or equal to 12 h), segmented heating (the total time is shorter than or equal to 200 min, and the residual oxygen content is lt, 3%), multi-stage high-pressure water descaling (the pressure before finish rolling is 30-35 MPa) and hot continuous rolling (the compression ratio is larger than or equal to 6) are conducted. The total decarburized layer depth of the obtained round steel is smaller than or equal to 0.30 mm, and the round steel has high hardenability, excellent mechanical property and low surface defect rate and is suitable for heavy-load components such as a hydraulic excavator caterpillar track link.

This invention discloses a rapid assessment method for hydrogen damage in ultra-long-life structures under alternating loads, relating to the field of materials performance evaluation. The method includes the following steps: S1: Analyzing the service conditions of typical ultra-long-life structures and key components to determine the service environment of key component materials; S2: Conducting ultra-high cycle fatigue tests under different stress ratios to obtain stress-life data for different lifespans; S3: Observing the fracture morphology of high-cycle fatigue and ultra-high cycle fatigue samples using scanning electron microscopy; S4: Performing hydrogen element detection to obtain the hydrogen content distribution around micro-defects; S5: Using the Basquin formula, piecewise linearly fitting the S-N data for the high-cycle fatigue and ultra-high cycle fatigue stages to obtain the slopes of two fitted lines; S6: Using the ratio of the slopes of the two fitted lines as the hydrogen damage factor. The method disclosed in this invention can achieve rapid assessment of hydrogen damage in long-life structures under alternating loads while ensuring the reliability of the assessment results.

The invention relates to the technical field of titanium alloy preparation and machining, and particularly discloses a method for preparing a titanium alloy workpiece through near-net forming of titanium hydride powder. The method comprises the steps that after titanium hydride powder and intermediate alloy powder are mixed, cold press molding is conducted under 200-800 MPa, and a pressed blank is obtained; sintering the pressed blank and the mold for the first time at the temperature of 500-1200 DEG C, preserving heat for 10-30 minutes, and then cooling; and the pressed blank is taken out of the mold, secondary sintering is carried out at the temperature of 1200-1400 DEG C, cooling is carried out after heat preservation is carried out for 2-4 hours, and a titanium alloy workpiece is obtained. The method does not include the step of partially dehydrogenating the titanium hydride powder before cold press molding. According to the method, the problem that the titanium hydride pressed blank is easy to crack during demolding is fundamentally solved through the first sintering with the mold by utilizing the volume shrinkage effect in the dehydrogenation process, so that the product percent of pass is greatly improved, and meanwhile, the low hydrogen content (llt of a workpiece is ensured; 0.015%), high density (greater than or equal to 99%) and uniform components.

The invention discloses an alloy aluminum bar containing rare elements and a preparation technology of the alloy aluminum bar. The alloy aluminum bar comprises, by mass, 1.5%-3.3% of Mg, 0.7%-1.1% of Si, 1.0%-1.7% of Cu, 0.15%-0.3% of Y, 0.07%-0.1% of Er, 0.05%-0.11% of Gd, 0.07%-0.24% of La, 0.08%-0.15% of Zr, 0.07%-0.12% of Ti, 0.05%-0.1% of Sc, smaller than or equal to 0.1% of Fe, 0.35%-0.7% of Mn, 0.2%-0.6% of Ni, smaller than or equal to 0.5% of total impurities and the balance aluminum. The preparation process comprises the following steps: burdening: accurately weighing a high-purity aluminum ingot, Al-Y, Al-Zr, Al-Ti intermediate alloy and pure metal according to the components; smelting: melting at 720-750 DEG C, preserving heat, and protecting by argon; cooling to 740-720 DEG C, and adding an intermediate alloy; a refining agent is added for degassing and deslagging, and slagging-off is conducted after standing is conducted for 30 min; casting: the temperature is 720-740 DEG C, the casting speed is 120-200mm / min, the strength of cooling water is 0.06-0.15 MPa, the water temperature is 10-30 DEG C, and online degassing is performed outside the furnace so that the hydrogen content is less than or equal to 0.15 cm / 100g Al; through scientific proportioning of conventional alloy elements such as Mg, Si, Cu and Mn and various rare elements such as Y, Er, Gd, La, Sc, Zr and Ti, the synergistic strengthening effect of the conventional elements and the rare elements is achieved, and the performance bottleneck of a traditional aluminum alloy is effectively broken through.

To provide a piezoelectric element with excellent displacement characteristics, and a liquid dispensing head including such piezoelectric element. [Solution] The piezoelectric element comprises a piezoelectric layer consisting of multiple layers and a pair of electrodes arranged on either side of the piezoelectric layer, wherein the piezoelectric layer is made of lead zirconate titanate, and when the average value H(Ave), maximum value H(max), and minimum value H(min) of the hydrogen content contained in the multiple layers in the center of the piezoelectric layer are defined as follows, and ΔH is the larger of the absolute values ​​of (H(max)-H(ave)) / H(ave)) or (H(min)-H(ave)) / H(ave)) as the rate of change of hydrogen content, ΔH is 24% or less.

The utility model relates to the field of electrolyzed water, and provides a catalyst coated membrane structure, a membrane electrode and a device for producing hydrogen by electrolyzing water, the catalyst coated membrane structure comprises a proton exchange membrane, a cathode catalyst layer and an anode catalyst layer, the cathode catalyst layer and the anode catalyst layer are respectively arranged on two sides of the proton exchange membrane, and the anode catalyst layer is arranged on the proton exchange membrane. And a hydrophobic hydrogen-resistant layer is arranged between the proton exchange membrane and the cathode catalyst layer. The method has the advantages that the hydrogen transmittance is reduced, so that the concentration of hydrogen in anode side oxygen is reduced, the explosion risk is reduced, and the safety coefficient during operation of the electrolytic cell is improved. In addition, expensive metal and metal oxide catalysts are not used in the scheme, so that the cost of the catalyst coating film is reduced while the hydrogen resistance effect is achieved. And when the hydrogen passing ability is reduced, normal proceeding of other mass transfer is guaranteed, the water electrolysis hydrogen production device still has high performance under the condition that the hydrogen content in the anode side oxygen is low, and the safety of an electrolytic cell during operation is improved.

The present application and invention relate to a method for the production and further processing of semi-finished products made of a metal, comprising the steps: -Casting of semi-finished products from a molten metal using a casting device; -If necessary, splitting a casting strand into semi-finished products of defined length using a cutting device; -Transporting the semi-finished products using a transport device; -Cooling of the semi-finished products in at least one cooling process; -Verification of the microstructure quality of the individual semi-finished products by calculating at least one process parameter relevant to the microstructure quality; -Decision on the steps for further processing of the respective semi-finished product in a cooling process based on at least this one process parameter; -where this process parameter is the hydrogen concentration in the semi-finished product and / or in the melt. Knowing the hydrogen content of the semi-finished products allows for a reduction in their dwell time during various cooling processes. The inventive method enables optimization of dwell times during stacking in the cooling process and an improvement in the quality of the semi-finished products.

This invention provides a high-end vacuum argon-oxygen refining apparatus (VODC furnace) for special metal materials and its refining method, belonging to the technical field of metallurgical refining equipment. It solves the problems of complex structure and high manufacturing and production costs associated with existing VOD furnace vacuum systems. This invention separates the vacuum system from the blowing system through modular design, employs a movable vacuum sealing structure and optimized furnace design, achieving a significant reduction in equipment and production costs. The refining method, by controlling the vacuum degree, oxygen blowing parameters, and stirring intensity, reduces non-metallic inclusions in the steel, achieving a hydrogen content of less than 1.5 × 10⁻⁶. ‑6 Oxygen content less than 2.0 × 10 ‑5 The chromium recovery rate in stainless steel reaches 98%-99%, and the refined steel possesses superior properties. Production efficiency is significantly improved while ensuring product quality. Compared with traditional equipment, this invention reduces equipment investment costs by more than 30%, shortens the refining cycle by 25%, and reduces energy consumption by 20%, making it particularly suitable for small-batch, multi-variety production of high-end specialty metal materials.

This invention discloses a method for preparing high creep-resistant and high-temperature resistant titanium alloy powder, relating to the field of titanium-based alloy technology. The titanium alloy powder composition includes 4%–8% aluminum, 1%–6% tin, 2%–8% zirconium, 1%–10% niobium, 0.5%–5% molybdenum, 0.05%–0.8% silicon, 0.01%–0.5% yttrium, and 0.5%–5% hafnium, with the balance being titanium and impurities. The titanium alloy melt is obtained by vacuum melting, cooled into alloy ingots, remelted, and then conveyed to an atomization system under high pressure under inert argon protection. Spherical titanium alloy powder is obtained by gas atomization; after multi-stage sieving and deep purification, impurities are removed and the oxygen, nitrogen and hydrogen content is reduced. The purified titanium alloy powders of different particle sizes are mixed and stored in an inert atmosphere; the atomization pressure is 3MPa to 10MPa, the powder particle size is 15μm to 53μm or 45μm to 105μm, the sphericity is not less than 95%, and the oxygen content is ≤0.15wt%, nitrogen content is ≤0.03wt%, and hydrogen content is ≤0.01wt%. This invention has excellent high-temperature stability, high creep resistance and good formability.

The invention discloses a liquid hydrogen production device and a working method thereof.The liquid hydrogen production device comprises a first heat exchanger, a pipe mechanism, a conversion mechanism, a cooling mechanism and a valve bank, a second cooling medium inlet, a first inlet and a first outlet are formed in the first heat exchanger, and the pipe mechanism comprises a first cooling pipe; and the first cooling pipes are connected with the first heat exchanger. The valve set comprises a second throttling valve, the second throttling valve is installed on a first cooling pipe, the first cooling pipe is communicated with a first outlet and a second cooling medium inlet, and circulating hydrogen entering the first heat exchanger from the first inlet exchanges heat with circulating hydrogen cooled and depressurized through the cooling mechanism. And the first cooling medium flows into the first cooling pipe from the first outlet, is throttled by the second throttling valve and enters the first heat exchanger from the second cooling medium inlet. The raw material hydrogen is cooled through the mode that expansion continuous refrigeration of the cooling mechanism cooperates with high-pressure throttling refrigeration, energy is saved, and meanwhile the product hydrogen with the parahydrogen content reaching 97% is produced.

The invention discloses a measurement and control method and a measurement and control device for preventing hydrogen sulfide corrosion of an oil well, and relates to the technical field of environmental protection. A stabilization method that a temperature sensor and a liquid level sensor are used for detecting the excessive amount of output zinc carbonate in the working environment of a medicament storage tank, a monitoring method that a 5G data transmission gateway is used for transmission and a central control system is used for monitoring the content of hydrogen sulfide are adopted, the injection amount of the medicament is comprehensively controlled and adjusted, and corrosion of hydrogen sulfide to the wall of an oil casing is prevented; corrosion and permeation to a gathering and transportation pipe network and equipment are prevented, the service life of the whole system from the well bottom to the gathering and transportation pipe network is prolonged, huge maintenance funds are reduced, and a new way for preventing hydrogen sulfide corrosion is developed for an oil field.

The application discloses a heat-conducting pouring sealant and a preparation method and application thereof, and belongs to the field of adhesives. The heat-conducting pouring sealant comprises the following raw materials in mass fractions: 70-130 parts of vinyl silicone oil; 10-35 parts of hydrogen-containing silicone oil mixture; 1-5 parts of filler modifier; 10-30 parts of methyl MQ resin; 150-450 parts of filler; 0.05-0.3 parts of inhibitor; and 0.1-1.5 parts of catalyst. The hydrogen-containing silicone oil mixture is a mixture of terminal hydrogen-containing silicone oil and side hydrogen-containing silicone oil, and the mass ratio of the hydrogen content of the terminal hydrogen-containing silicone oil to the hydrogen content of the side hydrogen-containing silicone oil is (5-8):1. The heat-conducting pouring sealant has the characteristics of low modulus, high toughness and good surface tackiness, and the pouring sealant can be completely torn off from components, thereby facilitating the rework of a photovoltaic power generation system such as an inverter. In addition, the heat-conducting pouring sealant also has the characteristics of low viscosity, high flow and excellent sedimentation.

The invention relates to the technical field of ultrahigh strength steel delayed cracking performance testing, in particular to an ultrahigh strength steel delayed cracking performance testing device and a testing method thereof.The testing method includes the following steps that firstly, a rectangular strip sample is cut from a to-be-tested ultrahigh strength steel plate, the width of the sample is 10-20 mm, the thickness of the sample is 0.5-6.0 mm, and the thickness of the sample is 10-20 mm; performing oil removal, grinding and ultrasonic cleaning, and recording a surface treatment mode; step II, bending the sample into a bending state according to a U shape, and enabling the surface of the outer layer to generate maximum surface strain, the method can be used for rapid screening and can also be used as a preposed step for threshold and life evaluation, the consistency and comparability of results between different laboratories and engineering units can be improved, and the method is suitable for large-scale popularization and application. And through hydrogen-free contrast, fracture microscopic analysis, diffusible hydrogen detection and finite element check, macroscopic crack behaviors are associated with microscopic fracture characteristics and hydrogen content, so that the capability of judging a fracturing mechanism is enhanced, and a reliable basis is provided for engineering material type selection and process verification.

The application relates to the technical field of gas-liquid separation, and provides a device and a method for reducing hydrogen content in oxygen by using a multistage gas-liquid separation technology, which comprises a separator, the inner cavity of the separator is sequentially divided into a first separation cavity and a second separation cavity from top to bottom, and the first separation cavity is communicated with the second separation cavity; a gas-liquid cyclone inner part is arranged in the first separation cavity; a strong centrifugal force field generated by the gas-liquid cyclone inner part is used for making micron-sized bubbles in a hydrogen-electrolyte mixture coalesce and separate, and free-state fine bubbles in the hydrogen-electrolyte mixture are efficiently removed; a throttling device is arranged between the first separation cavity and the second separation cavity, over-saturated dissolved hydrogen in hydrogen-rich electrolyte after first separation in the first separation cavity is depressurized through the throttling device, the hydrogen is actively precipitated by using static pressure drop, and separation is completed in the second cavity, so that the purpose of reducing hydrogen content in oxygen is achieved. The two-stage progressive separation structure significantly improves the hydrogen separation efficiency, and reduces the hydrogen content in oxygen to a low level.

The utility model provides high-purity aluminum oxide mixing and processing equipment, and belongs to the technical field of aluminum oxide. The high-purity aluminum oxide mixing processing equipment is characterized by comprising a reaction kettle; the motor is fixedly connected to the upper end of the reaction kettle; the rotating rod is fixedly connected to an output shaft of the motor; the stirring fan blades are fixedly connected to the circumferential surface of the rotating rod; the gas collecting box is fixedly connected to the circumferential surface of the reaction kettle; hydrogen generated during high-temperature reaction of aluminum oxide is collected into the gas collecting box through the first gas pipe by virtue of suction force of the suction fan, then the nitrogen cylinder is opened, and nitrogen is injected into the gas collecting box through the second gas pipe, so that the hydrogen is diluted, the explosion condition caused by excessive hydrogen content is prevented, and the safety of a working environment is improved; and the explosion or fire risk caused by hydrogen leakage is reduced.

The invention discloses a method for predicting the maximum fluidity of coal as fired by using the content of fatty hydrogen, and belongs to the technical field of coal coking. According to the method, the fat hydrogen content of the coal as fired is measured and analyzed, and the correlation model between the fat hydrogen content and the maximum fluidity is established, so that accurate prediction of the maximum fluidity of the coal as fired is realized; according to the method, the fat hydrogen content is used as a key index for predicting the maximum fluidity, and the limitation of the traditional method depending on indexes such as the maximum thickness Y value and the caking index G of a gelatinous layer is broken through; the fatty hydrogen content can more directly reflect the condition of active groups in a coal molecular structure, and is closely related to the caking property of the coal, so that the prediction result is more accurate and reliable; the problems that an existing method for predicting the maximum fluidity of coal as fired is complex in operation and large in error are solved.

This invention discloses a method for evaluating the hydrogen embrittlement susceptibility of high-strength mooring chains, belonging to the field of material performance evaluation technology. The method first involves taking samples from the non-welded area of ​​the chain links and subjecting them to pre-stretching treatment at a predetermined strain rate to simulate the stress history of the mooring chain's factory tensile test. Subsequently, electrochemical hydrogen charging and slow strain rate tensile tests are conducted on the samples before and after pre-straining in a simulated seawater environment. Finally, the influence of the pre-strain rate on hydrogen embrittlement susceptibility is quantitatively evaluated by analyzing the mechanical properties, fracture morphology, and hydrogen content changes of the samples. This invention, by introducing a pre-straining step, makes the evaluation conditions closer to the actual service state of the mooring chain, overcoming the limitation of traditional methods that cannot consider the influence of pre-strain, and providing a more accurate and scientific basis for the safety and reliability assessment of high-strength mooring chains.

The invention discloses a water electrolysis hydrogen production control system and method for reducing the hydrogen content in oxygen, and the system comprises a hydrogen production device, an oxygen separation device, a hydrogen separation device and a protection device; the hydrogen production device comprises an electrolytic bath, the oxygen separation device is connected with an anode chamber of the electrolytic bath, and the hydrogen separation device is connected with a cathode chamber of the electrolytic bath; the protection device is connected with the oxygen separation device and used for detecting the hydrogen concentration in oxygen in the oxygen separation device in real time in the running process of the hydrogen production device, and when the hydrogen concentration in oxygen in the oxygen separation device is larger than a set value, nitrogen or oxygen is introduced into the oxygen separation device so as to reduce the hydrogen concentration in oxygen in the oxygen separation device. The water electrolysis hydrogen production safety can be improved, the hydrogen production efficiency is improved, the operation load range of an electrolysis hydrogen production device is widened, and the production process is kept continuous and stable.

The application relates to the technical field of magnetocaloric materials, and discloses a low-curie-temperature iron-based magnetocaloric material, a preparation method, a deicing agent and a coating. The magnetocaloric material takes iron as the main body, introduces rare earth elements, transition group elements and metalloid elements to form a synergistic component system, and has the characteristics of adjustable curie temperature and high saturation magnetic induction intensity. The preparation method comprises the following steps: alloy smelting and high-temperature homogenization heat treatment, block pretreatment, segmented parameter control hydrogen crushing, and gradient temperature rising high-vacuum dehydrogenation. Through the hydrogenation process combining low-temperature permeation, high-pressure crushing and heat preservation and refinement, the uniform and controllable crushing of the alloy is realized, and the residual hydrogen content is effectively reduced in the multi-stage dehydrogenation process. The application can significantly improve the problems of serious oxidation, uneven particle size and magnetic performance attenuation existing in the traditional mechanical crushing or conventional hydrogen crushing process. The obtained magnetocaloric material shows high saturation magnetic induction intensity and stable magnetocaloric performance in the low curie temperature interval.

The invention belongs to the technical field of zinc-aluminum-magnesium units, particularly discloses a production method for reducing the dezincification output in the starting process of a zinc-aluminum-magnesium unit, and aims to solve the problems that in the starting process of the zinc-aluminum-magnesium unit, due to the dezincification defect, the waste product amount is increased, the defective product amount is reduced, and the production cost is reduced. And the cost loss is caused. Oil stains and scrap iron on the surface of the strip steel are reduced by controlling the surface state of the incoming strip steel and strengthening degreasing cleaning; the annealing furnace is subjected to segmented temperature control, hydrogen content regulation and control and furnace nose heating control, so that the surface activity of strip steel is improved, and the coating adhesive force is enhanced; and the temperature of the zinc liquid is controlled to be 427-433 DEG C, and the zinc-aluminum-magnesium alloy liquid is ensured to be in the optimal fluidity and reaction activity state, so that the waste product quantity and the degraded product quantity caused by the dezincification defect in the starting process are reduced, the cost loss is reduced, and the product percent of pass in the starting stage of a unit is improved.

The application discloses a high-pressure quick connector based on precipitation hardening stainless steel and a production process thereof, and belongs to the technical field of materials. In the production process, carbon-coated NbC-Cu functional carbide is added as an additive. The carbon-coated NbC-Cu functional carbide contains a nano copper phase. Through low-temperature solid solution and aging treatment, two kinds of precipitated phases can be generated. One is a B2-NiAl precipitated phase in high-coherent relation with the matrix, and the other is an FCC-Cu precipitated phase in incoherent relation with the matrix. The high-pressure quick connector can generate phase transformation induced plasticity caused by the martensite transformation of austenite in the deformation process, and the FCC-Cu precipitated phase can capture the hydrogen evolution as an effective hydrogen trap to reduce the diffusible hydrogen content in the matrix to the maximum extent, thereby reducing the hydrogen embrittlement sensitivity while ensuring the good mechanical properties of the high-pressure quick connector.

This invention discloses a method for measuring the remaining hydrogen content in solid-state hydrogen storage, belonging to the field of solid-state hydrogen storage technology. The method includes calculating a first hydrogen consumption based on the specific power and voltage of the fuel cell stack; calculating a second hydrogen consumption based on the diameter and duty cycle of the exhaust valve, as well as pre-acquired ambient temperature and pressure; and finally calculating a first remaining hydrogen content based on the total hydrogen weight, the first hydrogen consumption, and the second hydrogen consumption. This invention calculates the hydrogen consumption at the hydrogen tail exhaust more accurately by using the parameters of the exhaust valve and environmental parameters, thereby obtaining a more accurate first remaining hydrogen content and achieving more precise remaining hydrogen content calibration. Furthermore, this invention obtains the second remaining hydrogen content based on the hydrogen pressure value and the pre-acquired hydrogen storage mass density of the hydrogen storage module, and uses the second remaining hydrogen content to calibrate the first remaining hydrogen content, thereby further improving the accuracy of remaining hydrogen content calibration.

The invention discloses a method and system for evaluating the influence of hydrogen content on the fracture performance of a metal material under the stress-strain synergistic effect, and the method comprises the following steps: (1) carrying out a hydrogen diffusion and mechanical property coupling experiment, and carrying out an in-situ tensile hydrogen permeation experiment and a compact tensile experiment, and respectively obtaining a rule of hydrogen diffusion parameter co-evolution along with stress-strain and fracture toughness data in different hydrogen-stress-strain coupling states. (2) establishing and verifying a multi-physics field coupling numerical model, constructing a hydrogen diffusion-mechanical coupling model based on a stress driven diffusion and strain proliferation trap theory, and establishing a quantitative correlation function of stress-strain-hydrogen concentration-hydrogen induced crack initiation J integral through experimental data calibration; and (3) carrying out safety assessment on the defective pipeline, establishing an actual pipeline defect model, calculating J integral at the defect and predicted crack initiation J integral of the metal material under the working condition, and carrying out quantitative risk grading by defining a safety margin coefficient, so as to realize early warning and management and control of the hydrogen induced cracking risk.

This invention relates to the field of hydrogen production technology via water electrolysis, specifically to a composite self-supporting anode for anion exchange membrane electrolyzers and its preparation method. The composite self-supporting anode for anion exchange membrane electrolyzers comprises a self-supporting substrate, an oxygen evolution catalyst layer, and an electronically insulating platinum-based hydrogen elimination layer stacked sequentially. The oxygen evolution catalyst layer is supported on the self-supporting substrate, and the electronically insulating platinum-based hydrogen elimination layer is supported on the oxygen evolution catalyst layer. The composite self-supporting anode for anion exchange membrane electrolyzers of this invention completely blocks the electronic pathway between the hydrogen elimination catalyst and the conductive anode substrate, fundamentally avoiding the risk of the hydrogen elimination catalyst becoming a new source of hydrogen, achieving stable control of hydrogen concentration in oxygen and synergistic improvement in electrolysis efficiency. Simultaneously, the three-layer structure works synergistically, balancing the dual functions of low oxygen hydrogen content and efficient oxygen evolution, and possesses high mechanical strength and strong compatibility, allowing it to directly replace traditional anodes without significant modifications to the electrolyzer.

The invention provides a wind-solar complementary power generation and hydrogen storage system and a fuel cell energy management method thereof, and the method comprises the steps: calculating a power difference value Pnet in real time through wind-solar power generation and load demand power, and collecting the state of charge (SOC) of a storage battery and the hydrogen content (SHC) of a hydrogen storage cylinder through a data collection module; according to the power difference value Pnet, the state of charge (SOC) of a storage battery and the hydrogen content (SHC) of a hydrogen storage bottle, the working time periods of the fuel cell and the storage battery are judged; constructing an equivalent hydrogen consumption minimum strategy ECMS; anti-interference PI control is adopted, and the output power Pfc of the fuel cell is adjusted, so that the actual output power of the fuel cell is close to the distribution power. The power is distributed according to different working conditions and an equivalent hydrogen consumption minimum strategy ECMS, and the output power is controlled by adopting anti-interference PI control, so that the dual requirements of high fluctuation load and economical efficiency are met, the hydrogen consumption is reduced, the stability of the output power is ensured, and the service lives of the fuel cell and the storage battery are prolonged.

This invention discloses an aerospace aluminum rod with good ductility and low impurity content, and its preparation method, belonging to the field of metal material processing technology. The aerospace aluminum rod has an aluminum content ≥99.5%, an iron content of 0.20%-0.25%, a silicon content ≤0.04%, and a hydrogen content ≤0.22 ml / 100g Al. By precisely controlling the Fe content within the preferred range of 0.20%-0.25%, combined with multi-stage refining and purification, precise temperature-controlled casting, and surface quality control, this invention significantly reduces the impurity content of the aluminum rod, refines the grain structure, and improves its machinability and ductility. It achieves excellent processing performance, producing 200,000 meters of continuous 0.361mm ultrafine single wire without breakage, making it suitable for the large-scale production of high-end aluminum alloy wire bundles in photovoltaic, new energy vehicle, and other fields.

This invention discloses a method for preparing a biomass gasification adsorption-enhanced reforming hydrogen production catalyst, belonging to the fields of catalyst preparation and biomass thermal conversion technology. The catalyst of this invention uses CeO2 as a high-content support and Ni and Fe as active components. The method employs a co-impregnation method to simultaneously load a nickel active phase precursor and an iron co-catalytic precursor onto the support surface; after drying, the precursor powder is placed under an inert atmosphere and processed according to the following relationship... T ×0.01+ t By calcining at a temperature T of 10°C with a time t in a complementary correlation, a composite catalytic system with strong interactions is constructed. This invention also provides the application of the above catalyst in combination with a calcium-based adsorbent in biomass adsorption-enhanced reforming for hydrogen production. This invention enhances the catalyst's resistance to carbon deposition by regulating the bimetallic electronic structure and the oxygen storage and release capacity of the support. Simultaneously, by combining a segmented temperature control process, it achieves kinetic synergy between in-situ CO2 capture and catalytic reforming, significantly increasing the green hydrogen content in the syngas.

The invention belongs to the technical field of aluminum alloy production and processing, particularly relates to a production process of a high-performance boundary beam profile for a 6061 aluminum alloy automobile, and aims to solve the problems of serious magnesium element burning loss, unstable hydrogen content control, coarse structure, extrusion deformation, large mechanical property fluctuation, insufficient corrosion resistance and the like in the traditional process. The high requirements of light weight of the new energy automobile on the strength, toughness, forming precision and corrosion resistance of the edge beam are met. The process sequentially comprises the steps of raw material pretreatment, smelting refining, casting passivation, stepped annealing and shot blasting, extrusion forming, segmented air-blast quenching, double-stage aging and finished product treatment. The tensile strength of the final profile is larger than or equal to 260 MPa, the yield strength is larger than or equal to 240 MPa, the elongation is larger than or equal to 12%, the neutral salt spray test is larger than or equal to 500 h, the comprehensive performance is excellent, and the profile is suitable for automobile edge beam key force bearing components.