3114results about How to "Good looking" patented technology

The invention discloses an autoregressive visual target tracking algorithm based on token fusion, and the algorithm specifically comprises the following steps: 1, obtaining a public visual target tracking data set, and converting the data set into a central coordinate format; 2, preprocessing an initial template of a given video sequence, an online template at the current moment and a search image to obtain visual embedding of the initial template, a dynamic template and the search image; the method comprises the following steps: preprocessing an angular coordinate sequence of a target frame in previous historical N frames of a current search image of an input video to obtain historical track word embedding of the current search image; 3, constructing an autoregressive visual target tracking model based on token fusion, and designing a loss function; step 4, obtaining a final autoregressive visual target tracking model based on token fusion; the method solves the problem of insufficient model feature extraction capability caused by insufficient utilization of spatio-temporal information and redundant background information of a search area in an existing method.

The invention belongs to the technical field of metal powder preparation, and discloses a method for preparing silver powder through reduction of hydrazine hydrate with the adjustable particle size. The preparation method comprises the following steps that a first dispersing agent is dissolved in deionized water, a silver-ammonia solution and a hydrazine hydrate solution are sequentially added, stirring reaction is conducted, and nano-silver seed crystal sol is obtained; uniformly mixing the obtained nano-silver seed crystal sol with a hydrazine hydrate solution and a second dispersing agent to obtain a reducing base solution; adding a surface modifier into absolute ethyl alcohol, and uniformly dissolving to obtain a surface modification coating solution; preparing a silver-ammonia solution, adding the prepared silver-ammonia solution into the reducing base solution, then adding the surface modification coating solution, and stirring for reaction to obtain silver powder slurry liquid; and after solid-liquid separation, a solid phase is taken, washed and dried, and silver powder is obtained. The preparation method is simple in process, the particle size of the silver powder can be adjusted through the adding amount of the seed crystal, and the prepared silver powder particles are uniform in particle size distribution, high in dispersity and suitable for the fields of conductive silver paste, electronic packaging and the like.

The invention provides a method for precipitating nickel and cobalt in a solution containing nickel and cobalt and a cobalt nickel hydroxide product. The method comprises the following steps: step S100, carrying out a seed crystal pretreatment reaction on a nickel-cobalt-containing solution by adopting first nickel-cobalt precipitation underflow to form pretreated nickel-cobalt ore pulp; step S200, adding an alkaline precipitation inducer into the second nickel-cobalt precipitation underflow or the first nickel-cobalt precipitation overflow to carry out alkali conversion reaction to form alkali conversion crystal mush; s300, the pretreated nickel-cobalt ore pulp and alkali conversion crystal mush are continuously introduced into a reactor for a nickel-cobalt precipitation reaction, and nickel-cobalt precipitated ore pulp is obtained; step S400, continuously performing dense separation treatment on the ore pulp subjected to nickel-cobalt precipitation; s500, the third nickel-cobalt precipitation underflow is filtered and washed in sequence, a nickel-cobalt hydroxide product is obtained, and the problems that in the prior art, when nickel and cobalt are precipitated through a nickel-cobalt-containing solution, MHP is small in particle size and not prone to sedimentation, the water content of a filter cake is high, or the precipitation rate is poor, and the magnesium content is high before technical improvement are solved.

The invention relates to the technical field of semiconductors, in particular to a preparation method of a graphite piece containing a tantalum carbide coating, which at least comprises the following steps: preparing a slurry suspension containing a tantalum source, a carbon source, a sintering agent, a dispersing agent and an adhesive; coating the surface of a graphite piece with the slurry suspension, and drying to form a pre-coating layer; the pre-coating layer is subjected to high-temperature sintering, the tantalum carbide coating layer is formed after natural cooling, the grain size of the tantalum carbide coating layer is 30-90 microns, the tantalum carbide coating layer graphite piece which is high in bonding strength, large in grain size and of a porous structure is obtained through slurry suspension preparation, graphite coating and high-temperature sintering, operation is easy, the production cost is low, and the actual application requirement is better met.

The invention relates to the field of polyurethane coating processing, in particular to a waterproof bio-based polyurethane coating and a preparation technology thereof.The waterproof bio-based polyurethane coating is prepared from, by weight, 25%-40% of castor oil polyester polyol, 15%-25% of isocyanate, 5%-10% of bio-based polybasic acid, 0.2%-0.6% of a catalyst, 0.5%-1% of a chain extender, 15%-20% of modified nanofiller, 3%-5% of a wetting agent and 1%-2% of a curing agent. By adopting the formula, the prepared waterproof bio-based polyurethane coating has good weather resistance, high and low temperature resistance, strength and waterproofness, and can be used in Tibet, Xinjiang, Inner Mongolia, Qinghai and other regions for a long time without aging, and the service life of the waterproof coating is prolonged.

The invention relates to a manufacturing method for delicious pork slices. To overcome the influence of too much intake of pork products on a human body, the manufacturing method for the delicious pork slices is provided. The manufacturing method comprises the steps of cutting the pork into the pork slices with the thickness of 2-4 mm; immersing the pork slices in an immersion liquid for 10-30 minutes; heating the immersion liquid with the pork slices and cooking for 0.5-1 h; fishing the pork slices out; draining the liquid; packaging and sterilizing. The manufacturing method is characterized in that, based on 100 parts by weight of the pork slices, the immersion liquid comprises, by weight, 1-5 parts of red yeast, 1-10 parts of rice wine, 20-30 parts of soy sauce, 1-5 parts of dried ginger, 10-20 parts of white sugar, 1-5 parts of spices, 1-5 parts of sodium bicarbonate, 15-30 parts of seaweed and 50-60 parts of water. The pork slices processed by the method can effectively prevent damp and hot proliferation in a stomach after being taken, and gives health to a human body while guaranteeing nutrition of the human body.

The invention provides a precise rolling process for a high-carbon cobalt-based wear-resistant stellite 6B alloy plate, and mainly relates to the field of plate rolling. The rolling process comprises the working procedures of stellite 6B alloy plate blank heating, aluminum silicate fiber cotton wrapping, hot rolling, machining, precise rolling, coping, inspection and the like. The stellite 6B alloy plate prepared by the method is excellent in wear resistance, meets the use requirements of high-performance plates on wear resistance, long service life and high strength, and has a good market application prospect.

The invention relates to the technical field of batteries, in particular to a battery cell cover plate and a battery cell. The battery cell cover plate comprises a cover plate main body provided with a mounting hole; the pole is arranged in the mounting hole; the riveting piece is riveted with the pole post and then is welded with the pole post; the welding joint of the pole and the riveting piece is filled with the welding filling piece, and the melting point of the welding filling piece is lower than that of the pole and that of the riveting piece. The welding filling piece is filled at the welding joint of the pole and the riveting piece, so that the pole and the riveting piece can be wrapped after the welding filling piece is heated and melted, and the welding strength of the pole and the riveting piece is ensured; the melting point of the welding filling piece is lower than that of the pole and the riveting piece, so that the welding filling piece cannot generate high temperature after being melted, the influence of thermal deformation of the riveting piece is small, the flatness of the riveting piece is effectively improved, the appearance of the welding area of the pole and the riveting piece is improved, the appearance yield of the cell cover plate is improved, and the production cost is reduced. Therefore, the safety and the yield of the battery cell are improved.

The invention relates to the technical field of armoring machines, and provides a cable copper strip armoring machine which is used for winding a copper strip on a moving core wire to form an armoring wire, a first sleeve is provided with a first hole channel, two ends of the first hole channel are respectively a bare wire inlet and an armoring wire outlet, and the core wire enters the first hole channel through the bare wire inlet and enters the armoring wire outlet through the armoring wire outlet. The armored wire moves out of the first hole channel through the armored wire outlet, the first sleeve is further provided with a first belt inlet, and a copper belt enters the first hole channel through the first belt inlet. The first compression roller is rotationally arranged on the first sleeve and is in rolling butt joint with the surface of the armored wire; the two second pressing rollers are rotationally arranged in the first belt inlet and abut against the surface of the armored wire in a rolling mode. According to the technical scheme, the problems of winding path deviation, winding clearance, loosening after winding, insufficient compactness and the like in the copper strip armoring process caused by deformation of a certain degree due to the fact that the cable and the copper strip are possibly subjected to various external forces in the production, transportation and installation processes in the prior art are solved.

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing method of an ultrahigh-strength steel-stainless steel interlayer heterogeneous structural part. Comprising the following steps that (1) a model is obtained, and an additive model is designed according to performance requirements needed by a structural part; (2) additive preparation is conducted, specifically, the type and specification of a base plate are selected, mechanical grinding and welding wire filling are conducted on the base plate, an additive path is planned according to the model, and a robot walking program is written; and (3) material adding is started, the optimal technological parameters are matched according to the planned material adding path, and material adding of the structural part is started and completed. The ultrahigh-strength steel-stainless steel heterostructure part obtained through the method has the excellent strength-toughness comprehensive mechanical property, the material adding efficiency is high, the interface of the ultrahigh-strength steel-stainless steel heterostructure part is free of the defects of holes, microcracks, unbonding and the like, and the surface quality is excellent.

The invention discloses a preparation method and application of an ammonium ion pre-embedded Cu-MOF derived CuHCF / MXene electrode material, and relates to the technical field of new energy nanometer materials. According to the preparation method, Cu-BTC is taken as a sacrificial template, ammonium ion pre-embedding and flaky MXene compounding are carried out, and synthesis is carried out under the condition of coprecipitation at room temperature. The preparation method provided by the invention is low in cost and simple in process, and the obtained electrode material is excellent in morphology and performance. When the prepared CuHCF / MXene composite electrode is applied to capacitive deionization, the characteristic of high NH4 < + > adsorption capacity is shown. According to the preparation method, hydrogen-bond interaction is formed between H atoms in NH4 < + > and N atoms in CuHCF, so that the NH4 < + > adsorption potential energy is reduced, the adsorption capacity is improved, and meanwhile, the defects that CuHCF is prone to agglomeration, poor in conductivity and the like are overcome through self-assembly of the CuHCF and MXene.

The embodiment of the invention discloses a self-adaptive rapid non-dominated sorting genetic method and system, a storage medium and equipment. The method comprises the following steps: setting a population scale, a maximum iteration generation number and a generation channel parameter; selecting a preset number of individuals from the initial population as a parent population according to the individual fitness on the basis of the population scale and the generational channel parameters; determining a self-adaptive crossover probability and a self-adaptive mutation probability according to the non-dominated level and the congestion degree of the parent population; performing crossover variation according to the adaptive crossover probability and the adaptive variation probability in the progressive stage and the mutation stage; performing non-dominated solution sorting on individuals in the parent population after crossover variation to form a new offspring population; and determining a final filial generation population according to the non-dominated level and the congestion degree of the combined parent population and the new filial generation population until the maximum iteration generation number is reached, and outputting a non-dominated optimal solution set. And multiple crossover and mutation are carried out through the adaptive crossover probability and the adaptive mutation probability, so that the convergence speed is accelerated.

The present invention relates to the field of semiconductor material technology, and in particular to a sealant for electrostatic chuck gaps, and a preparation method and application thereof. The main raw material of the sealant is silicone, and it may also include modified nano-silicon dioxide and other fillers. The present invention has a convenient operation process and a wide range of applications, and is applicable to gaps of any shape as long as the thickness is less than 2 mm. At the same time, the sealant has better corrosion resistance, reduces the maintenance cost of the electrostatic chuck, and prolongs its service life.

The invention discloses a folding knife locking structure. The locking structure comprises a lock bridge, a button gasket, a screw gasket, a button, a main shaft, a main shaft screw, a locking spring and a button spring. The lock bridge can be automatically inserted into the locking groove or the closing groove formed in the cutting edge according to the rotation angle of the cutting edge under the pushing of the locking spring, the locking effect is automatically achieved, the lock bridge is provided with the locking contact face and is divided into the flat section and the inclined section with different angles, the double effects of abrasion compensation and locking safety are achieved, and the service life of the blade is prolonged. The locking structure is simple in structure and convenient to operate, does not need manual insurance operation, has the advantages of being convenient to control and firm in locking at the same time, operation gestures do not need fingers to appear on a blade turning-back path, and the locking structure only needs one main shaft screw for fastening, does not have any specific structure exposure in appearance and has the advantages of being simple and attractive. According to the invention, the overall occupied space is small, avoiding interference to the cutting edge is little, the storage proportion during closing is high, and the advantage of saving space is achieved.

The invention discloses a conveying and winding device for carton packaging, which belongs to the technical field of carton packaging, and has the technical key points that the conveying and winding device comprises a first conveying seat and a second conveying seat, and a winding belt can synchronously perform winding operation while a carton continuously moves through an arranged conveying and winding mechanism, so that the operation time is greatly shortened, and the production efficiency is improved. Clamping operation becomes simple and visual through the arranged clamping mechanism, clamping and fixing operation on the carton can be completed in a short time, a clamping plate drives the clamped carton to turn over by 90 degrees through the arranged material taking and placing mechanism, the carton is located above the second conveying base, at the moment, due to the fact that the carton is turned over by 90 degrees, the carton is not prone to falling off, and the carton is not prone to falling off. Therefore, when the carton body is conveyed on the second conveying base, conveying and winding treatment of the other annular face of the carton can be correspondingly completed, manual intervention overturning is not needed, the automation degree is high, the packaging and processing efficiency of the carton is remarkably improved, and the carton conveying, overturning and winding device has the advantages of being convenient to convey, overturn and wind, high in packaging automation degree and high in working efficiency.

The invention discloses an injection mold for limo dining table production, and relates to the technical field of injection molds, the injection mold comprises a base and further comprises a protection device, a lower mold is fixedly mounted at the top of the base, a cooling pipe is fixedly mounted on the surface of the lower mold, and a placement frame is fixedly mounted at the top of the base; a placing groove is formed in the surface of the placing frame, a placing rod is fixedly installed at the bottom of the inner wall of the placing groove, a displacement device is arranged on the circumferential surface of the placing rod, a placing frame is fixedly installed on the side, away from the placing frame, of the displacement device, and a supporting rod slidably penetrates through the inner wall and the outer wall of the placing frame; the placing plate moves to drive the upper mold and the injection molding pipe to deviate by a short distance and not to be aligned with the lower mold, so that residual liquid plastic in the injection molding pipe is prevented from directly dripping on the top of a molded plastic product, and the surface quality and appearance of the molded plastic product can be improved by preventing the liquid plastic from dripping on the top of the molded plastic product.

The invention discloses an iron manganese phosphate precursor and a preparation method thereof, and belongs to the technical field of lithium ion batteries, the iron manganese phosphate precursor is prepared from a phosphoric acid solution, iron powder, manganese carbonate, a surfactant and a UiO-66-NH2 / Nb2CTx composite material through chemical reaction and solid-phase reaction, the iron powder is used as an iron source, the manganese carbonate is used as a manganese source, phosphoric acid is used as phosphoric acid, and the UiO-66-NH2 / Nb2CTx composite material is used as a framework; according to the preparation method, the molar ratio of iron, manganese and phosphorus is accurately controlled, and a surfactant is used, so that the manganese iron phosphate precursor with uniform granularity, good morphology and a porous structure is obtained, the contact area between the prepared lithium manganese iron phosphate positive electrode material and an electrolyte is relatively large, and the lithium manganese iron phosphate positive electrode material has relatively high ion and electron transmission performance; and finally, the prepared lithium battery has the characteristics of high capacity and good cycle performance.

The invention discloses a camera decoration assembly and electronic equipment, and belongs to the technical field of communication equipment, and the camera decoration assembly comprises a decoration part, a lens, a supporting part, a first bonding layer and a second bonding layer; the decorating part is provided with a groove and a light through hole communicated with the groove; the lens is embedded in the groove to define a mounting cavity; the supporting part is located in the mounting cavity, an annular texture surface is arranged on the inner surface of the groove, and the annular texture surface and the lens are oppositely arranged; the supporting part is provided with a first surface and a second surface which are arranged oppositely, the supporting part is provided with a through hole penetrating through the first surface and the second surface, the first surface is attached to the lens through a first bonding layer, and the second surface is attached to the bottom wall of the groove through a second bonding layer; at least one of the first bonding layer, the supporting part, the second bonding layer and the decorating part forms a ventilation channel, one end of the ventilation channel is communicated with the mounting cavity, and the other end of the ventilation channel is communicated with the external environment of the camera decorating assembly.

The invention provides a synthetic method of methyl p-tert-butylbenzoate, and belongs to the technical field of chemical synthesis, the synthetic method comprises the following steps: mixing sulfonic acid resin in a molten state with calcium salt of nano powder, then rapidly solidifying to prepare mixed particles, and then sequentially carrying out pickling activation, cleaning and drying to prepare a modified sulfonic acid resin catalyst; the calcium salt is at least one of calcium sulfate and calcium silicate; the method comprises the following steps: adding p-tert-butylbenzoic acid and absolute methanol into reaction equipment, carrying out a step-by-step esterification reaction of heating and cooling at 90-150 DEG C under the catalysis of a modified sulfonic acid resin catalyst, and carrying out post-treatment after the reaction is finished, so as to obtain methyl p-tert-butylbenzoate, wherein the molar ratio of p-tert-butylbenzoic acid to absolute methanol is (1: 3)-(1: 5). According to the method, the modified sulfonic acid resin is used as the catalyst, and the stepped esterification reaction of heating and cooling is combined, so that the methyl p-tert-butylbenzoate with the purity being greater than or equal to 99.99% is prepared, and the conversion rate of p-tert-butylbenzoic acid exceeds 99%.

The invention relates to the technical field of preparation of lithium iron phosphate positive electrode materials, and discloses a method for preparing modified lithium iron phosphate through carbon-coated metal doping and positive electrode lithium supplementation, which comprises the following steps: S1, dissolving Li3PO4 powder, adding a Fe2SO. 7H2O aqueous solution into the solution, stirring and drying to obtain a LiFePO4 precursor; s2, testing the element content of the precursor; s3, supplementing a lithium source and a phosphorus source to the precursor, adding a carbon source and metal salt, and uniformly mixing; s4, the precursor mixed solution is put into a sand mill to be subjected to sand milling for 60-120 min to be fully mixed; s5, performing spray drying on the sanded precursor, and collecting a product; and S6, calcining and carbonizing the product to obtain the active substance. S7, dissolving the active substance, and magnetically stirring and mixing; and S8, performing coating and vacuum drying on the mixed slurry, and performing half-cell manufacturing and electrochemical performance testing. The crystal stability is improved, and the battery life is prolonged.

The utility model discloses an automatic tin soldering machine for a relay, which comprises a rack, and the rack is provided with a feeding mechanism, a tin soldering mechanism, a tin soldering mechanism, a tin soldering mechanism, a tin soldering mechanism and a tin soldering mechanism, the liquid pumping mechanism comprises a supply container and a peristaltic pump, the supply container is used for containing scaling powder, and the peristaltic pump is connected with the supply container to pump the scaling powder into the supply container; the tin furnace mechanism comprises a tin cup and a tin bath, the tin cup is located in the tin bath and connected with a first lifting air cylinder, and a liquid level detection probe is arranged above the tin bath; the washing mechanism comprises a cleaning water tank; the cooling and blow-drying device comprises an air knife which is connected with an air blower; the transfer mechanical arm comprises a portal frame, the portal frame is located above the machine frame, a three-axis moving module and a clamping jaw are arranged on the portal frame, the clamping jaw is installed on the three-axis moving module, and automatic high-precision soldering tin feeding can be achieved.

The invention provides a preparation method of a carbon fiber screen supporting structure, which comprises the following steps: S1, graphitizing continuous carbon PAN-based carbon fiber and continuous pitch-based carbon fiber, oxidizing, electrolyzing, washing, drying, sizing and drying to obtain surface modified carbon fiber; s2, impregnating the surface-modified carbon fibers on the surface of the resin adhesive film loaded with the aminated carbon nanotubes in a preimpregnation machine, and electrifying the carbon fibers in the impregnation process, so that the carbon nanotubes are vertically rooted on the surfaces of the carbon fibers to obtain a carbon fiber prepreg; s3, the PAN-based carbon fiber and the pitch-based carbon fiber prepreg are orthogonally laid on a hot-pressing mold, and then vacuumizing treatment, curing forming treatment, demolding and machining are sequentially carried out, so that the carbon fiber screen supporting structure is obtained.

The invention provides asphalt-based hard carbon microspheres, a preparation method thereof and a sodium ion battery. The preparation method comprises the following steps: S1, stirring asphalt and basic zinc carbonate microspheres in a solvent for reaction to obtain an asphalt-based carbon microsphere precursor; s2, mixing the asphalt-based carbon microsphere precursor with a metal salt modifier to obtain a modified asphalt-based carbon microsphere precursor; the metal salt modifier is zinc salt, magnesium salt or calcium salt; s3, annealing and carbonizing the modified asphalt-based carbon microsphere precursor; and S4, carrying out acid pickling, water washing and drying treatment on the carbonized product to obtain the asphalt-based hard carbon microspheres. Through the combined action of a template method and the metal salt modifier, the pore structure and morphology of the hard carbon material are improved, so that the hard carbon material has high specific surface area and rich pore structures, and the obtained hard carbon material has excellent performance, high discharge capacity and high initial charge-discharge efficiency.

The utility model relates to an extensible clothes airing rod mechanism and a clothes dryer, and belongs to the field of clothes dryer devices. An extensible clothes airing rod mechanism comprises an outer shell; a support tube; the telescopic rod assembly is arranged on the supporting pipe, and the telescopic rod assembly can be stretched or shortened; the hanging rack assembly is arranged on the telescopic rod assembly and located at the end, away from the outer shell, of the telescopic rod assembly, when the hanging rack assembly is in a first state, the hanging rack assembly is unfolded for airing clothes, and when the hanging rack assembly is in a second state, the hanging rack assembly is folded and can be stored. The state that the hanger assembly is unfolded for airing clothes is matched with the stretching state of the telescopic rod assembly for use, and the supporting pipe is arranged on the outer shell, so that the telescopic clothes airing rod mechanism can be stably and vertically used and used for airing and hanging the clothes; when the telescopic rod assembly is shortened and stored, the hanging frame assembly is folded and stored, so that the overall size of the telescopic clothes airing rod mechanism is minimum, and storage is convenient.

The invention relates to the technical field of cosmetics, and particularly discloses an oxyresveratrol-containing multi-vitamin anti-pollution composition suitable for sensitive skin and application of the oxyresveratrol-containing multi-vitamin anti-pollution composition, the multi-vitamin anti-pollution composition comprises oxyresveratrol, epigallocatechin gallic acid glucoside, acetylchitosamine and annona squamosa extract; the mass ratio of the oxyresveratrol to the epigallocatechin gallic acid glucoside to the acetylchitosamine to the annona squamosa extract is (0.1 to 3) to (0.001 to 0.1) to (1 to 10) to (0.1 to 5). The anti-pollution composition provided by the invention achieves the effects of relieving, repairing and whitening by simultaneously resisting various pollutants such as air pollution, ultraviolet rays, heavy metals and the like, and comprehensively solves the problems of yellow smell and sensitivity of skin.

The invention provides a 3D concrete pouring device and method for a fabricated member, relates to the field of concrete member processing, and aims to solve the problems of low construction efficiency and poor member quality during prefabrication of the concrete member at present, through continuous rolling of a stirring device of a conveying system, the uniformity of concrete can be kept, and material layering is prevented; it is ensured that the concrete still has good working performance when being conveyed to a pouring system; meanwhile, a three-axis movement assembly is arranged to control an output port in the tail end of the corrugated pipe to move in different directions, the function of automatic pouring can be achieved, and in the aspect of concrete compaction, the form of an integrated vibrating table is adopted. And through the vibration effect of the vibrating table, bubbles in the concrete rapidly float upwards and are discharged, and gaps in the concrete are reduced. The concrete is denser under the exhaust action, so that the compressive strength and durability of the concrete are improved.

The rocking handle connecting structure comprises an umbrella handle, the umbrella handle is provided with a hollow umbrella handle cavity, and a receding hole communicated with the umbrella handle cavity is formed in the single side of the umbrella handle in the left-right direction; the fixing seat is arranged in a hollow mode, the fixing seat is arranged outside the umbrella handle in a sleeving mode, and a fixing seat hole penetrating through the umbrella handle cavity and the receding hole is formed in the single side, in the left-right direction, of the fixing seat; at least part of the rocking handle structure penetrates through the fixing seat hole and the receding hole and is located in the umbrella handle cavity, the rocking handle structure is arranged around the axis of the rocking handle in a rotating mode relative to the umbrella handle, and at least one end of the rocking handle structure in the left-right direction is not exposed out of the umbrella handle.

The invention relates to the technical field of etching solutions, in particular to the field of IPC C23F, and more particularly relates to a double-agent copper-molybdenum-titanium etching solution and a preparation method thereof. Comprising a main agent and an auxiliary agent, and the main agent comprises the following components in parts by weight: 8-15 parts of an oxidizing agent, 4-13 parts of first organic acid, 1-3 parts of first inorganic acid, 1-3 parts of first organic alkali, 1-4 parts of a first surfactant, 0.05-0.5 part of a first fluorine-containing compound, 0.01-1 part of a first corrosion inhibitor and 60-80 parts of water; and the auxiliary agent comprises the following components: 10-60 parts of second organic acid, 2-10 parts of second inorganic acid, 1-5 parts of second organic alkali, 0.05-0.5 part of a second fluorine-containing compound, 1-5 parts of a second surfactant, 0.5-2 parts of a second corrosion inhibitor and 50-80 parts of water. The problems of large etching rate fluctuation, chamfering, vertical angle, precipitation, crystallization and the like in the etching process of the etching liquid are solved.

The invention discloses an asynchronous rolling process method of a high-strength and high-toughness Al-Cu-Mg-Ag alloy plate, which comprises the following steps: carrying out multi-pass asynchronous hot rolling on an Al-Cu-Mg-Ag alloy ingot to obtain a hot-rolled plate, carrying out annealing treatment on the hot-rolled plate to obtain an annealed part, and carrying out multi-pass asynchronous cold rolling on the annealed part to obtain a cold-rolled plate, and finally, the cold-rolled plate is sequentially subjected to solution treatment and aging treatment, and the high-strength and high-toughness Al-Cu-Mg-Ag alloy plate is obtained. According to the method, the initial cast ingot is directly subjected to asynchronous rolling forming, the morphology of a primary phase is remarkably improved, the content of Cu atoms in an aluminum solid solution is increased, the microstructure is regulated and controlled through plastic deformation and heat treatment process adjustment, and then the strength of the alloy plate is remarkably improved.

The present invention provides a kind of spherical gold powder and preparation method thereof, relate to the technical field of precious metal powder preparation, the preparation method uses aqua regia to prepare chloroauric acid solution, and uses concentrated hydrochloric acid to adjust pH to 1.5-2, then adds ammonia water to adjust pH to 7-9, stirs 20-60s, then adds concentrated hydrochloric acid to adjust pH to 1.2-2 again, obtains mixed solution B;Then, the first dispersant solution is poured into the aforementioned mixed solution B, after stirring evenly, the mixed solution A of the second dispersant and the reducing agent is quickly added, after stirring reaction, sedimentation, post-treatment, obtains spherical gold powder. Wherein, spherical gold powder of different sizes with a particle size within the range of 0.3-4 μm can be prepared by adjusting pH twice, and adding two different dispersants in a specific order of addition can make the prepared spherical gold powder uniform in particle size, good in dispersibility, regular in shape and smooth in surface. The preparation method reacts rapidly, the process is short and stable, and it has been stably expanded to 500g, which can realize large-scale industrial production.