22results about How to "Reduce hydrogen content" patented technology

The invention provides a preparation method of a multi-element doped asphalt-based hard carbon material for a negative electrode of a sodium-ion battery, which comprises the following steps: (S1) mixing and crushing asphalt and zinc salt of organic acid, and pre-oxidizing in an oxygen-containing atmosphere to obtain pre-oxidized asphalt particles; (S2) uniformly mixing the pre-oxidized asphalt particles, N-containing aromatic polyaldehyde and 1-hydroxyethylidene-1, 1-diphosphonic acid, and carrying out heating reaction in an inert atmosphere to obtain modified asphalt particles; and (S3) carrying out high-temperature carbonization on the modified asphalt particles in an inert atmosphere to obtain the multi-element doped asphalt-based hard carbon material. Firstly, an asphalt precursor and organic acid zinc are mixed and then pre-oxidized, then a cross-linking agent containing N and a cross-linking agent containing P are added for cross-linking, the obtained hard carbon material has a short-range ordered structure, and the sodium storage capacity and the sodium ion transmission capacity are both improved. The hard carbon material obtained by the preparation method has high specific capacity and first coulombic efficiency, and the rate capability is also improved.

The invention provides a method for preparing hydrogen-rich low-carbon synthesis gas through chemical chain gasification of high-water-content biogas residues, and belongs to the technical field of solid waste treatment. The method comprises the following steps: mixing high-water-content biogas residues with an oxygen carrier, and carrying out chemical chain gasification reaction to obtain hydrogen-rich low-carbon synthesis gas; the moisture content of the biogas residues with high moisture content is 30-50%; the oxygen carrier is transition metal loaded lanthanum oxide. According to the method, the high-water-content biogas residues are subjected to chemical-looping gasification conversion by adopting the metal composite water carbon capture oxygen carrier material transition metal loaded lanthanum oxide, so that the water content tolerance of biogas residue chemical-looping gasification is improved, the quality of the synthesis gas is optimized, the hydrogen content in the synthesis gas is improved, and the CO2 content is reduced.

The invention discloses an aluminum alloy strip for battery case production and a preparation method thereof, and relates to the technical field of aluminum alloy processing, and the aluminum alloy strip comprises the following components in parts by weight: 75-95 parts of aluminum, 2-4 parts of silicon, 0.35-0.55 part of magnesium, 0.3-0.5 part of manganese, 1.30-1.80 parts of copper, 0.30-0.70 part of zinc, 0.20-0.50 part of titanium, 0.20-0.45 part of strontium, 0.35-0.65 part of rare earth elements and inevitable impurity elements. According to the aluminum alloy strip for producing the battery shell and the preparation method of the aluminum alloy strip, the components of the aluminum alloy are reasonably adjusted, so that the components of the aluminum alloy are more reasonable, and the produced aluminum alloy strip has the characteristics of high strength, high heat dissipation speed and corrosion resistance, can meet the use requirements of a lithium battery, and is good in use effect and high in practicability. Good use prospects are realized.

The aluminum alloy low-pressure pouring degassing device comprises a quantitative furnace, a gas guide pipe is arranged in the quantitative furnace and is longitudinally arranged, a fireproof layer is arranged on the peripheral face of the gas guide pipe, a gas guide hole is formed in the bottom of the gas guide pipe, and the gas guide hole is close to the inner bottom of the quantitative furnace; the upper part of the gas guide pipe penetrates out of the quantitative furnace and is communicated with one end of a heat-resistant gas pipe through a flange; the other end of the heat-resistant gas pipe is communicated with an argon bottle. According to the method, after the aluminum alloy melt enters the quantitative furnace, the argon bottle is opened, argon enters the gas guide pipe through the heat-resistant gas pipe, the connector and the connecting pipe in sequence, then is discharged through the gas guide hole and enters the aluminum alloy melt, the argon forms bubbles and rises after entering the melt, and hydrogen is gradually separated out of the melt and attached to the surfaces of the argon bubbles; along with the rising of argon bubbles, molten aluminum alloy is brought out, and the hydrogen content is reduced.

The invention discloses a pitting-corrosion-resistant nuclear-grade duplex stainless steel welding rod and a preparation method and application thereof. The invention belongs to the technical field of welding. The nuclear-grade duplex stainless steel welding rod solves the problem that nuclear-grade duplex stainless steel welding rods with excellent tensile property, impact toughness and pitting corrosion resistance are lacked in the prior art. The pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode comprises the core wire and the coating coated on the outer wall of the core wire, the pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode has strong desulfurization and dephosphorization capabilities, the coating has a dehydrogenation effect, the room-temperature tensile strength exceeds 690 MPa, the room-temperature percentage elongation after fracture exceeds 20%, the-40 DEG C low-temperature impact is larger than 90 J, the pitting corrosion rate is smaller than 10 mdd, nitrided ferrochrome is added into the coating, and therefore the pitting corrosion resistance of the pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode is greatly improved, and the service life of the pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode is prolonged. And the contents of Cr and N are increased, so that the pitting corrosion resistance index of deposited metal can be improved. The special requirements for tensile property, impact toughness and pitting corrosion resistance of the nuclear power station welding rod can be fully met, so that the nuclear power station welding rod can be applied to the fields of nuclear power station construction and the like.

This invention relates to the field of alloy purification technology, specifically to a method, system, and aluminum alloy welding material for preparation of self-purifying aluminum alloy welding material. The method for preparing the self-purifying aluminum alloy welding material includes the following steps: cold pressing a mixture of aluminum alloy powder and refining agent powder to obtain a cold-pressed billet; hot pressing the cold-pressed billet to obtain a hot-pressed aluminum ingot; removing impurities from the surface of the hot-pressed aluminum ingot, followed by preheating to obtain a preheated ingot; and extruding the preheated ingot into wire. This invention uses powder metallurgy to prepare aluminum alloy welding material with self-purifying function, extending the degassing method of aluminum alloy smelting to the aluminum alloy welding process. This relaxes the strict requirements on the hydrogen content of the aluminum alloy base material, achieving a weld with lower hydrogen content. The method is more efficient, more stable, and less expensive.

The invention relates to an annealing treatment device for a gate plate of a gate gate of an SCR (selective catalytic reduction) denitration valve, and belongs to the technical field of heat treatment annealing luring. The annealing treatment device for the gate plate of the gate gate of the SCR denitration valve comprises a base and further comprises a displacement mechanism; and a rotating mechanism. Through cooperative use of the displacement mechanism, the rotating mechanism and the leveling mechanism, the rotating mechanism drives the gate plate of the slide plate gate to rotate through the displacement mechanism and the leveling mechanism, so that a leveling roller in the leveling mechanism rolls back and forth along the outer surface of the gate plate of the slide plate gate, and the gate plate of the slide plate gate is leveled; bending deformation of the sliding plate door caused by creep phenomena due to the fact that the strength and the elastic modulus of steel are remarkably reduced and the plasticity is remarkably improved under the action of temperature is prevented, the flatness of the sliding plate door plate in the heat treatment annealing process is guaranteed, bending deformation of the sliding plate door plate is avoided, and the service life of the sliding plate door plate is prolonged. And the quality of the gate plate of the slide plate gate after heat treatment annealing is ensured, the burden of personnel is relieved, and the heat treatment annealing quality is improved.

The invention relates to the technical field of proton exchange membrane electrolyzed water, in particular to a preparation method and application of a composite proton exchange membrane. The migration of noble metal ions in the membrane is realized by utilizing pH gradient and ion gradient, the noble metal ions are doped into one side of an anode of the membrane, uniform distribution of noble metal particles in the membrane is realized by utilizing a longitudinal dipping mode, and then the time of reduction through in-situ sodium borohydride is controlled, and the doping amount of a hydrogen elimination catalyst is controlled, so that the hydrogen elimination efficiency is improved. And preparing the ultralow noble metal loading capacity composite membrane. The composite proton exchange membrane is prepared through precious metal impregnation reduction, the performance is guaranteed, meanwhile, the hydrogen permeation amount of a membrane electrode is reduced, the hydrogen content in anode side oxygen is reduced, the product purity is improved, and meanwhile, the safety is improved. The uniform distribution of the noble metal fully improves the utilization rate of the catalyst, so that the catalyst coating film can obtain an excellent hydrogen elimination effect when a small amount of noble metal is impregnated.

The present invention provides a flux-cored welding wire, which specifically relates to the field of welding materials. The flux-cored welding wire of the present invention is used for welding liquefied gas cylinders. The flux-cored welding wire comprises a steel strip and a flux core filled in the steel strip. The flux core comprises the following components by mass percentage: 6-9% of low-carbon ferromanganese, 8-10% of silicon-manganese alloy, 4-5% of ferrosilicon, 5-7% of aluminum-magnesium alloy, 1-2% of graphite, 1-2% of ferrotitanium, 6-8% of cryolite, and the balance is iron powder. The flux-cored welding wire of the present invention has small spatter during welding, stable arc, good welding processability, no slag and gloss on the weld surface, saves the process of post-weld grinding treatment, can improve the welding effect, and ensure the beauty of the weld, has good strength, elongation and impact toughness, and can have good pressure resistance, air tightness and fatigue resistance.

The application relates to the technical field of aluminum-lithium alloy processing, and particularly discloses a low-cost high-quality aluminum-lithium alloy preparation method, which comprises the following steps: concentrating aluminum alloy raw materials without lithium to carry out smelting, then refining and degassing to obtain a base aluminum alloy melt; maintaining and heat-insulating the base aluminum alloy melt; introducing inert gas into a transition cabin and a sealed cabin to keep the sealed cabin and the transition cabin in a micro-positive pressure state and keep the pressure in the sealed cabin higher than that in the transition cabin; placing the base aluminum alloy melt in a tundish, then transferring the tundish into the transition cabin, closing an outer cabin door, and introducing inert gas into the transition cabin; opening an inner cabin door, closing the inner cabin door after transferring the tundish into the sealed cabin, adding pure lithium raw materials into the base aluminum alloy melt, and stirring the pure lithium raw materials uniformly; and then pressure casting to obtain an aluminum-lithium alloy pressure casting part. The application can effectively avoid oxidation of lithium elements, guarantee high cleanliness and component accuracy of the melt, reduce production cost, and is suitable for popularization and application.

The invention discloses a method for reducing micropores after thermal deformation of an additive 7050 aluminum alloy, and relates to a method for reducing micropores after thermal deformation of an additive aluminum alloy. The invention aims to solve the problem that numerous micropores still exist in the existing additive aluminum alloy subjected to thermal deformation modification. The method comprises the following steps: 1, preparing the 7050 aluminum alloy by adopting an electric arc additive manufacturing technology; 2, heating and preserving heat; 3, hot compression; 4, vacuum heat treatment; and 5, heat treatment. The method is used for reducing the micropores after thermal deformation of the additive 7050 aluminum alloy.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a bar for a desert deep well and a preparation method of the bar, the bar for the desert deep well comprises the following chemical components in percentage by weight: 0.19-0.22% of C, 0.15-0.35% of Si, 0.45-0.55% of Mn, less than or equal to 0.010% of P, less than or equal to 0.001% of S, 0.45-0.55% of Cr, 0.70-0.80% of Mo, 0.02-0.05% of Nb, 0.09-0.11% of V, 0.01-0.025% of Al, 0.01-0.025% of Ti, 0.0015-0.0025% of B, less than or equal to 0.15% of Cu, less than or equal to 0.15% of Ni, less than or equal to 0.020% of Sn, less than or equal to 0.020% of As, less than According to the invention, reasonable component design is carried out on the bar material, so that the bar material has better corrosion resistance and hydrogen induced cracking resistance, and the bar material is suitable for extreme weather in desert areas, and is especially suitable for oil wells with the depth of more than 5000 meters.

The present invention belongs to the technical field of gas shielded welding, and specifically is a multi-directional inverter type carbon dioxide gas shielded welding machine. It comprises a main body, a box body is fixedly connected to the main body, a wire feeding wheel is arranged in the box body, and electronic components are arranged on one side of the box body; the driving mechanism is located in the box body for providing power; the cleaning mechanism is located in the box body for cleaning the electronic components. The present invention cooperates with the driving mechanism and squeezes the cleaning mechanism by the driving mechanism, so that the cleaning mechanism blows off the dust accumulated in the box body and on the electronic components, so that the electronic components are cleaned in time, the temperature of the electronic components is reduced, and the probability of damage to the welding machine is reduced.

The invention belongs to the technical field of preparation of Kovar alloy foils, and aims to solve the problems that the content of trace elements is difficult to control and harmful trace elements are difficult to further reduce in a Kovar alloy foil preparation process in the prior art. Therefore, the invention provides the preparation method of the kovar alloy foil, and the preparation method comprises the following steps: putting a kovar alloy raw material into a smelting furnace for smelting, and pouring the smelted metal liquid into a target mold to form a steel ingot; the steel ingot is forged into a blank after being heated; the forged blank is subjected to surface cleaning after being cooled; carrying out dehydrogenation treatment on the blank subjected to surface cleaning; and the alloy obtained after dehydrogenation treatment is subjected to one-time hot rolling treatment and multiple-time cold rolling treatment to obtain the kovar alloy foil with the target thickness. When the Kovar alloy foil is prepared, the content of trace elements is accurately controlled, the content of harmful trace elements such as sulfur is reduced, the problem of hydrogen embrittlement of the Kovar alloy is avoided, and the ductility and toughness of the Kovar alloy are improved.

The embodiment of the invention provides a storage array and a preparation method thereof, a memory and electronic equipment, and relates to the technical field of electronic equipment. The memory array includes a stacked structure, a plurality of channel layers, a spacer portion, and a support portion. The stacked structure comprises a plurality of stacked first electrode layers; the stacked structure is provided with an open groove, the open groove comprises an open hole and a plurality of sub-grooves, the open hole penetrates through the multiple first electrode layers, the sub-grooves are formed in the side wall of the open hole, and the sub-grooves and the first electrode layers are arranged on the same layer. And the channel layer is arranged on the inner wall of the sub-groove and is in contact with the first electrode layer. The spacing part is arranged in the sub-groove and at least arranged on the surface, away from the first electrode layer, of the channel layer. The supporting part is at least filled in the open hole, and the interval part is arranged between the supporting part and the channel layer. The material of the spacing part is different from that of the supporting part, and the hydrogen content of the spacing part is smaller than that of the supporting part. According to the embodiment of the invention, the damage to the channel layer in the storage array is reduced, and the electrical performance of the storage array is optimized.

The invention relates to the technical field of catalyst preparation, and discloses a nickel-based catalyst as well as a preparation method and application thereof. The nickel-based catalyst contains a carrier, an active component and an auxiliary agent, the active component is Ni elementary substance and nickel oxide; the auxiliary agent is selected from one or more than two of oxides of Zn, Na, Mg, Zr, K and Cu; and the nickel oxide compound is selected from one or more than two of NiO, Ni3O4 and Ni2O3. The nickel-based catalyst has bifunctional activity, and can promote activation of hydrogen while promoting oxygen adsorption, so that the catalytic activity of the nickel-based catalyst is further improved, and the deoxidation efficiency of the catalyst is improved.

The present application relates to a kind of high-chromium high-nickel nitrogen-containing stainless steel forging billet quality control method, which can not only reduce forging heating fire times and save production cost, but also effectively improve the overall quality of the forging billet, suitable for the forging billet with outer diameter ≤350mm, first manufacturing intermediate billet with certain forging ratio + intermediate billet normalizing + air cooling + hydrogen annealing + forging billet surface temperature control + limited speed heating and step temperature holding + normalizing + temperature control cooling to promote microstructure transformation + high-temperature tempering and isothermal transformation composite process, which not only reduces forging heating fire times, saves production cost, but also effectively improves the overall quality of the forging billet.

The invention relates to the technical field of solar cells, in particular to a silicon heterojunction cell composite gradient passivation film and a preparation method thereof.The preparation method comprises the following steps that when an intrinsic amorphous silicon layer is prepared, only silane is introduced, then hydrogen is introduced while the flow of the silane is kept unchanged, and the intrinsic amorphous silicon layer is prepared by taking 2-4 seconds as one stage; the hydrogen / silane gas volume ratio in each stage is 1.25-2 times of the hydrogen / silane gas volume ratio in the previous stage, and the total time of introducing the hydrogen to prepare the intrinsic amorphous silicon layer is 60-120 seconds. Due to the introduction of the composite film layer with the hydrogen / silane ratio continuously changed, parameters such as the overall band gap, the refractive index and the extinction coefficient of the passive film layer are obviously improved, and more photons can reach PN junctions. The photoelectric conversion efficiency of the cell is obviously improved, and the stability is obviously improved.

A harmless comprehensive utilization method for liquid aluminum-chromium slag comprises the following steps: (1) placing high-temperature liquid aluminum-chromium slag in a steel ladle, pouring the high-temperature liquid aluminum-chromium slag into an electric arc furnace for later use, and adding coke particles; (2) starting an electric arc furnace, enabling the mixture to react by utilizing high temperature generated by an electrode arc, and obtaining an upper layer alpha-Al2O3 phase high-purity fused corundum and a lower layer chromium carbide after the reaction is finished; (3) after the high-temperature reduction smelting is completed, carrying out hydrogen-argon mixed gas bottom blowing on furnace liquid in a furnace body, and then separating high-purity fused corundum from chromium carbide; (4) crushing, screening and packaging the high-purity fused corundum to obtain a high-purity fused corundum product; performing sand blasting treatment on the surface of the chromium carbide to remove impurities, crushing, screening and packaging to obtain a chromium carbide product; according to the method, the high-temperature liquid aluminum-chromium slag generated in the metal chromium production process is used as the raw material, the coke is used as the reducing agent, and the electric arc furnace is used for smelting to obtain the high-purity fused corundum and chromium carbide with high additional value, so that the energy is greatly saved, the process flow is shortened, and the production efficiency is improved.

The invention belongs to the technical field of pipeline welding, and particularly relates to a sintered flux and method suitable for hydrogen conveying submerged-arc welding of a steel pipe. The invention relates to a sintered flux suitable for hydrogen transport submerged arc welding of a steel pipe. The sintered flux comprises the following chemical components in percentage by weight: 40-50% of HJ431 welding powder, 10-15% of MgO, 15-20% of CaF2, 5-10% of BaCO3, 2-5% of TiO2, 1-3% of an Al powder deoxidizing agent, 5-10% of a Mn-Fe alloying agent and Plt. 0.02%, Slt; and 0.018% of the total weight. After the sintered flux is matched with an H08MnNi2A welding wire to be applied to hydrogen-resistant pipeline steel and subjected to 1.6 m / min high-speed submerged arc welding, a weld joint has the good performance that the tensile strength is moderate, the impact toughness is excellent, the diffusible hydrogen content is low, and the HIC and SSCC corrosion resistance is consistent with that of corresponding hydrogen-resistant base metal; the problems of efficient welding and obdurability of pipeline steel and conveying safety of pipeline hydrogen energy can be effectively solved.

The invention relates to a low-gas-content copper-aluminum composite casting system which comprises a copper melting furnace, a copper heat preservation furnace, a deoxidizing device, a copper-aluminum composite furnace, an aluminum melting furnace, an aluminum heat preservation furnace and a hydrogen removing device. The deoxidizing device is used for blowing inert gas into copper liquid of the copper heat preservation furnace, and the copper heat preservation furnace is communicated with the copper-aluminum composite furnace through a channel. The aluminum melting furnace is communicated with the aluminum heat preservation furnace, the dehydrogenation device is arranged in the aluminum heat preservation furnace and used for blowing inert gas into molten aluminum of the aluminum heat preservation furnace, and the aluminum heat preservation furnace is communicated with the copper-aluminum composite furnace through a second conveying channel. The inert gas is introduced into the copper liquid and the aluminum liquid respectively, the inert gas enables the copper liquid and the aluminum liquid to roll over, the deoxidizing and dehydrogenating effects are achieved, the purity of the copper liquid and the aluminum liquid is improved, the casting quality is improved, and continuous and large-scale production of the copper-aluminum compound system is achieved.