96results about How to "Improve anti-oxidation effect" patented technology

The invention discloses nanometer mixed powder, a high-temperature antioxidant coating and application of the nanometer mixed powder and the high-temperature antioxidant coating, and belongs to the technical field of steel heat treatment antioxidant protection. The high-temperature antioxidant coating comprises the nanometer mixed powder, and the nanometer mixed powder comprises, by weight, 50%-75% of silicon nitride nano-powder, 10%-25% of active carbide, 10%-15% of an accelerant and 5%-10% of an agglutinant, wherein the active carbide is selected from SiC powder, B4C powder and Al4C3 powder, the accelerant comprises SiO2, Al2O3 and K2O+Na2O, and the agglutinant comprises Fe3O4. By means of the high-temperature antioxidant coating, steel metal has the good antioxidant performance during high-temperature heat treatment, the application scope is wider, and the pollution to the environment is small, and the cost is low.

The invention relates to a technology for preventing high-temperature oxidation of carbon anodes during aluminum electrolysis production, specifically to an anti-oxidation coating for carbon anodes in aluminum electrolysis. The coating comprises, by weight, 30-40% of alumina powder, 10-20% of sodium fluoride, 10-20% of aluminium fluoride, 1.0-5.0% of a complex anti-oxidant, 10-15% of a binder, 2-5% of a suspending agent and the rest of a solvent. The high-temperature anti-oxidation coating can effectively raise oxidation resistance of carbon anodes at high temperature, has an effect of resisting corrosion of cryolite slag to the coating, effectively reduces carbon anode consumption in aluminum electrolysis production, prolongs service life of carbon anodes, saves consumption cost of carbon anodes, decreases discharge of gas generated by high-temperature oxidation-combustion of carbon anodes, and obviously improves the working environment.

The method includes following steps: using chemical coprecipitation method to prepare mixed liquor of ammonia (or sodium hydroxide), bivalent iron salt (manganese, nickel, cobalt etc.) and tervalent iron salt; dropping the mixed liquor to ion exchange water, and keeping pH of solution at 7; mixing round the solution to generate suspending liquid of ferrite; using ultrasonic to coat a layer of surface active agent on surfaces of fine grains evenly; finally, using ultrasonic to disperse fine grains on solvent evenly.

The invention discloses a coating material for preventing a submersed nozzle from nodulation and a preparation method thereof, and belongs to the technical field of coating materials of submersed nozzles. The coating material comprises the following components in parts by weight: 20-56 parts of mullite fine powder, 15-23 parts of corundum fine powder, 4-8 parts of Guangxi white mud, 7-18 parts ofactivated aluminum oxide micro powder, 5-8 parts of aluminum dihydrogen phosphate, 8-12 parts of a fluxing agent, 2-11 parts of an antioxidant and 0.3-2.0 parts of a dispersing agent. The invention aims to solve the problems that in the prior art, a submersed nozzle is easy to bake and oxidize, and nodules are generated to block the submersed nozzle. According to the coating material for preventing the submersed nozzle from nodulation and the preparation method thereof, the purposes of preventing the submersed nozzle from being baked and oxidized and preventing air from entering molten steel through the nozzle in the using process can be achieved, and the submersed nozzle is prevented from blocking caused by nodulation.

The invention provides an anti-oxidation processing method of a copper wire, which comprises the steps of smelting, wire drawing and annealing. The processing method provided by the invention realizes stable anti-oxidation effect and uniform lamination; the obtained copper wire has good electrical conductivity and is easy to weld and not easily oxidized; and the method can be widely applied to the processing of a copper wire.

The invention relates to a quantum dot optical thin film without a barrier film and a preparation method thereof. The quantum dot optical thin film comprises a body which prepared by curing a quantumdot colloid solution to form a film. The quantum dot colloid solution comprises, by weight, 0.5 part of a quantum dot solution and a resin solution, wherein the quantum dot solution has a concentration of 15 mg/L; the resin solution comprises, by weight, 10 parts of organic resin, 100 to 400 parts of a diluent and 0.1 part of an auxiliary agent; and the above components are mixed in proportion toprepare the quantum dot colloid solution which is then naturally dried in the air for film formation. According to the quantum dot optical thin film of the invention, quantum dots are wrapped by organic resin in virtue of the film forming property of the organic resin, and supporting with a substrate and protection via a barrier film are not needed; after the quantum dot optical thin film is formed after curing, the quantum dot optical thin film can be directly used and has excellent water and oxidation resistance and improved light transmittance; and the preparation method is simplified and material cost is reduced.

The invention relates to the technical field of steel metallurgy, and particularly relates to a method for preparing a steel ladle or a tundish covering agent by using boron slurry. The method comprises the steps of: dehydrating and drying the boron slurry in a gas furnace; converting Fe2O3 in the boron slurry into magnetic Fe3O4; reducing MnO into Mn; removing the Mn through magnetic separation; and adding a pre-melted mixture of CaO and Al2O3 so as to obtain a molten steel covering agent serving as a steel ladle or a tundish, or adding a small number of carbon materials for controlling the melting speed and the melting performance so as to obtain the covering agent. According to the method, waste boron slurry resources can be reused; the method has the advantages of being simple in preparation process, low in machining cost, eliminating harm of the boron slurry and reducing discharging of metallurgical waste; furthermore, the covering agent prepared by the method has high surface activity, good impurity absorption performance, good expandability and good effects of preventing molten steel from sucking air and being oxidized and preserving heat, has remarkable economic and social benefits and is deserved to popularization.

The invention relates to a liquid leadless solder anti-oxidization anti-slag additive, and relative production, wherein it comprises Sn at 90-93% and P at 10-7%. The production comprises adding tin into pot to be fused, and cutting the left fine tin rod into sheet tin bars, coiling it into ball shape and compressing into cake; then adding phosphor powder uniformly into stainless steel mixing cylinder, sealing cover and emerging into the liquid fused liquid of pot; lifting the cylinder up and down, until the material is fused and flowed into the pot, cooling it into particles. The invention has better oxidation resistance, while the slag rate can be reduced 40-60%.

The invention discloses a packaging structure of a luminous semiconductor chip and a packaging method thereof. The packaging structure of the luminous semiconductor chip comprises the luminous semiconductor chip and a lampshade, wherein the luminous semiconductor chip is fixed on the bracket of the luminous semiconductor chip; the lampshade and the bracket of the luminous semiconductor chip are fixedly connected and form a sealed cavity; and the luminous semiconductor chip is positioned in the cavity. The lampshade and the bracket of the luminous semiconductor chip of the invention form the sealed cavity to isolate the luminous semiconductor chip from outside and oxygen, so that the luminous semiconductor chip has less possibility of being affected with damp and oxidized, and the packaging structure can be in nude packing without encapsulation by epoxy resin, thus the luminous semiconductor chip can radiate the heat from each direction so as to greatly improve the heat dissipation environment of the luminous semiconductor chip, and the luminous semiconductor chip has normal working temperature without a radiator. Thus, the packaging structure has low manufacture cost, is favourable for popularizing and using products, has simple packaging technology and is favourable for the mass production of the product.

The invention relates to a novel aluminum steel continuous casting tundish covering agent and the application thereof and belongs to the technical field of steel continuous casting. The tundish covering agent comprises components, by mass, 26-35% of CaO, 26-13% of SiO, 22-32% of Al2O3, 5-12% of MgO, 8-15% of (Na2O+Li2O) and 2-8% of B2O3. The tundish covering agent has the low viscosity of 0.5-1.2 Pa.s at the temperature of 1300 DEG C and has the low melting temperature of 1180 DEG C-1300 DEG C, can effectively absorb impurities in aluminum steel, improve the cleanness of molten steel in a tundish, well prevent the molten steel from being oxidized for the second time, and improve the quality of a casting blank, and has the advantages of being good in heat preserving property and the like. The designed covering agent can be well applied to the aluminum steel continuous casting process with the Al mass percentage within the range of 0.3-3%.

The invention relates to a method for preventing enameled wires from being oxidized. The method includes performing annealing treatment for copper wires via annealing pipelines; filling steam to the middle of each annealing pipeline via two ends of the annealing pipeline; and simultaneously filling steam into the two ends of each annealing pipeline from the middle of the annealing pipeline. A device for implementing the method for preventing the enameled wires from being oxidized comprises an annealing furnace and the annealing pipelines penetrating through the annealing furnace, steam pipelines are connected to the two ends of each annealing pipeline, and a steam pipeline is connected to the middle of each annealing pipeline. The method and the device have the advantages that the method includes filling the steam from two sides and the middle of each annealing pipeline, so that the steam in the annealing pipelines cannot flow to the outside, the steam utilization rate is increased, and electricity and energy are saved; and the oxidation prevention performance is good, and the quality of each enameled wire can be improved.

The invention discloses a magnet for a micro-electronic water pump rotor. The magnet comprises a magnet body, and the magnet body is injection molding polyphenylene sulfide PPS-neodymium iron boron magnet; a low-temperature plasma dielectric layer is formed on the outer surface of the magnet body through plasma surface modification treatment, a poly-p-xylene vacuum gas phase deposition layer is formed outside the low-temperature plasma dielectric layer of the magnet body through a vacuum gas phase deposition method. The invention further discloses a preparation method of the magnet for the micro-electronic water pump rotor. The magnet for the micro-electronic water pump rotor is more excellent in acid-base resistance, solvent resistance, oxidation resistance and magnetic performance, smallin size, low in mass, high in working efficiency, and capable of meeting the requirement for the severe working environment of a micro-electronic water pump.

The invention discloses an anti-oxidation method for forging a double-drive-axle triple gear. The anti-oxidation method comprises the steps of feeding, intermediate frequency furnace heating, die preheating, die lubricant spraying, blank making die cavity feeding, blank making and forming, pre-forging die cavity material taking, forging, material taking, die lubricating, stacking, water soaking, steel shot casting, shot blasting, descaling, intermediate frequency protecting gas heating, precision forging shaping die cavity feeding, and isothermal normalizing. The anti-oxidation method for forging the double-drive-axle triple gear can be used for preventing forging piece oxidation in the process of forging the triple gear. The anti-oxidation method for forging the double-drive-axle triple gear has the advantages of being reasonable in technology, convenient to achieve and good in anti-oxidation effect. The anti-oxidation method for forging the double-drive-axle triple gear is suitable for being used as a method for preventing oxidation of metal parts.

A fusible chaplet for a thin-walled iron casting comprises an inner copper body and an outer tin layer wrapping the exterior of the copper body. The inner copper body is made of copper, and the outertin layer is made of tin; the inner copper body comprises a binding post, and an upper supporting seat and a lower supporting seat which are vertically connected to the two ends of the binding post; acombined core comprises an upper water jacket core, round bar cores and chaplets, and one upper water jacket core is provided; a plurality of round bar cores and chaplets are provided, and the roundbar cores correspond to the chaplets one by one; the top surface of the upper water jacket core is provided with a plurality of core units arranged continuously, and one round bar core is arranged above each core unit correspondingly; and one chaplet is arranged between each round bar core and each core unit. According to the design, not only can the more complete fusion between the chaplets and the casting be ensured, but also impurities are not introduced; and the anti-oxidation effect is better.

The invention discloses a cutting fluid for after-cutting processing of neodymium iron boron. The cutting fluid comprises the following components, by weight: 5-7% of ethylenediamine, 14-16% of isopropanol amine, 8-10% of oleic acid, 1-3% of sebacic acid, 3-5% of water-soluble phosphate, 4-6% of polyether, 12-14% of methyl benzotriazole, 0.5-0.7% of TX-10, 6-8% of polyvinyl alcohol, 0.1-0.3% of 5-chlorine-2-methyl-4-isothiazolin-3-one, 0.5-0.7% of emulsified oil, 3-5% of isopropyl alcohol and the balance of water.

The invention relates to an electrolytic copper foil antioxidant. The electrolytic copper foil antioxidant comprises the following components, by mass, 0.1-10 parts of carboxylic acid, 0.1-5 parts ofinorganic salt or a silane coupling agent, 0.1-10 parts of a surfactant mixture and 0.1-10 parts of a film-forming agent. The surfactant mixture comprises at least one surfactant having an HLB value less than 14 and at least one surfactant having an HLB value greater than 14. According to the provided electrolytic copper foil antioxidant, the antioxidant does not contain heavy metals, does not need to be electrified and does not need to be washed with water, is safe and environment-friendly, and is a new generation of electrolytic copper foil antioxidant.

The invention provides a special protective paint for an expressway crash barrier, and a preparation method of the special protective paint. The protective paint consists of the following components in parts by weight: 40-60 parts of an acrylic resin, 50-80 parts of an epoxy resin, 10-20 parts of butanol, 10-20 parts of propyl ester, 10-20 parts of a thinner and 0.3-0.6 part of a drier. The preparation method comprises: placing the components into a reaction kettle, carrying out stirring treatment for 1 h at a rotating speed of 280-530 r/min, then adding a dispersing agent and a defoaming agent into the mixture obtained in the step 1, and carrying out stirring treatment again for 1.5 h at a rotating speed of 400-600 r/min to finally obtain a finished product. According to the invention, after being used, the protective paint has strong adhesive force, high-temperature resistance, water resistance, salt mist resistance, oil resistance and corrosion resistance; the protective paint is simple to process; and when the protective paint is used for spraying maintenance of an expressway crash barrier, the crash barrier can keep the complete use function, the service life of the expresswaycrash barrier is prolonged, normal passing of vehicles is not hindered, and the maintenance cost can be greatly reduced.

The invention provides a method for improving the quality of the inner surface of a 3D printed part. The method comprises the following steps that chemical plating is conducted on a printed part by utilizing a first material so as to deposit a first material layer on the surface of the printed part; and the printed part is placed into a vacuum furnace for heat treatment. According to the method, surface voids and tiny pits of the surface of the printed part with an internal groove structure can be filled with materials, the roughness of the inner surface and the outer surface of the printed part is reduced, and the surface quality of the inner surface and the outer surface of the printed part is improved; and in addition, due to the fact that the thickness of the first material layer usedfor coating a substrate of the printed part is smaller than 5 microns, the internal structure accuracy, the shape accuracy or the size accuracy of the printed part cannot be influenced.

The invention relates to a casting anti-oxidation device and method. The casting anti-oxidation device comprises a sand tank located on the lower portion and filled with sand, a plurality of cover bodies covering the sand and capable of being lifted upwards are arranged above the sand tank, the cover bodies are arranged linearly in the length direction of the sand tank, supports are erected at thetwo ends of the sand tank, and a first cross beam is transversely arranged between the upper ends of the two supports; and air cylinders corresponding to the cover bodies one to one are arranged on the first cross beam, and the driving ends of telescopic rods of the air cylinders are connected with the cover bodies. According to the casting anti-oxidation device, operation is easy, using is convenient, it can be ensured that a casting is cooled in an oxygen-free environment, the surface of the casting is prevented from being oxidized, the anti-oxidation effect is good, the casting surface quality is improved, and the service life of the casting is prolonged.

The invention discloses a polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor as well as a preparation method and application thereof. The preparation method of the antioxidant corrosion inhibitor comprises the following steps: dissolving cyanuric chloride in an organic solvent to obtain a solution A, adding an organic amine into the organic solvent to obtain a solution B, adding the solution B into the solution A at 0-5 DEG C, and stirring for carrying out a reaction for 2-3h; then, heating up to 30-45 DEG C, carrying out a reaction for 4-6h, then heating up to 70-80 DEG C andcarrying out a reaction for 8-12h; cooling to the room temperature, filtering, washing, and drying to obtain the antioxidant corrosion inhibitor. The corrosion inhibitor has good corrosion inhibitionproperty at the high temperature; when being used an antioxidant corrosion inhibitor for a gas-injection well, the polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor has good dissolubility in highly mineralized formation brines, and has an obvious inhibiting effect on oxygen corrosion of carbon steel of the gas-injection well.