113results about How to "Meet performance requirements" patented technology

The invention discloses silver powder and a preparation method and application thereof, and the preparation method of the silver powder comprises the following steps: dispersing a silver source in an alcohol amine compound solution, adding a dispersing agent, and then reacting with a C3-C27 fatty amine solution to prepare the silver powder. The micron silver powder is prepared through the hydrothermal method, the powder can be heated more evenly, the method is simple in process, short in reaction time and high in efficiency, the obtained micron silver powder is good in dispersity, and the tap density of the silver powder can reach about 7 g / cm < 3 >.

The invention provides a one-dimensional pneumatic design method and device for an axial flow compressor, and belongs to the field of axial flow compressor pneumatic design. The method comprises the following steps: taking values of a plurality of design variables as the state of a reinforcement learning agent; the intelligent agent outputs the adjustment amount of the design variable according to the state, and the adjustment amount serves as the action executed by the intelligent agent; applying the action to the value of the current design variable to obtain an updated design variable; utilizing a one-dimensional inverse problem design program to generate a one-dimensional pneumatic design scheme of the gas compressor; utilizing a one-dimensional normal problem analysis program to output performance indexes; constructing a reward function according to the performance indexes; based on feedback provided by the reward function, a depth deterministic strategy gradient algorithm is adopted to train the intelligent agent; and performing one-dimensional pneumatic design of the gas compressor by using the trained intelligent agent. According to the method and device provided by the invention, the problems that the one-dimensional design of the axial flow compressor depends on experience, the efficiency is low, automatic optimization is difficult and the response is slow can be solved.

The invention relates to the technical field of cement production and manufacturing, aims at solving the problems that an existing grinding system is single in function and cannot have multiple cement grinding processes at the same time, and provides a composite multi-process cement grinding system and process and a cement production method. Wherein the composite multi-process cement grinding system comprises a roller press grinding system and a ball mill grinding system, and the composite multi-process cement grinding process comprises three grinding processes, namely a combined grinding process, a semi-final grinding process and a final grinding process; the cement production method comprises the following steps: separately grinding clinker and a mixed material by using two sets of cement grinding systems, and then mixing by using a mixing system to obtain a finished product. According to the invention, the limitation of a single grinding system is broken through, the operability of the system is improved through an ingenious switching means, and the advantages and functions of production through one system and coexistence of multiple technological processes are realized.

The invention discloses a full-size wind tunnel high-load blade, which relates to the technical field of wind tunnel equipment and comprises a metal blade root, a hollow main beam and a blade body, a main beam connecting section is arranged at one end of the metal blade root, and the side wall of the main beam connecting section is a first conical side wall surface; the large opening end of the first conical side wall face is closer to the end, provided with the main beam connecting section, of the metal blade root than the small opening end of the first conical side wall face. The hollow main beam is formed by wrapping a carbon fiber cloth layer; a blade root connecting section is arranged at one end of the hollow main beam and fixedly arranged on the main beam connecting section in a sleeving mode. The inner side wall of the blade root connecting section is a second conical side wall face, and the second conical side wall face is attached to the first conical side wall face. The blade body is made of a carbon fiber material; and the blade body is fixedly arranged on the hollow main beam. The lightweight design degree of the blade is improved, and the lightweight effect of the blade structure is achieved.

The invention discloses a multispectral remote sensing image panchromatic sharpening method based on a frequency domain decomposition network, the method constructs a frequency domain decomposition and domain generalization network, and the network comprises three core modules: a dynamic convolution low-frequency extraction module, a high-frequency holding module and a spectrum enhancement module; a domain generalization training strategy is provided, a class generative adversarial network structure is adopted, and an adversarial loss function is introduced; and the generator is guided to realize better cross-domain generalization ability under the supervision of the discriminator by intentionally distributing the domain labels by mistake. According to the method, information of different scales is effectively captured, the quality of the fused image is improved, and accurate fusion of invisible satellite data is realized.

The invention relates to the technical field of metal materials, and discloses an Al-Zn heat-treatment-free aluminum alloy and a preparation method and application thereof. The Al-Zn series heat treatment-free aluminum alloy is prepared from the following components in percentage by mass: 8.0 percent to 18.0 percent of Zn, 4.0 percent to 9.0 percent of Si, 0.5 percent to 4.0 percent of Cu, 0.3 percent to 1.2 percent of Mn, 0.1 percent to 0.5 percent of Zr, 0.1 percent to 0.9 percent of V, 0.1 percent to 0.4 percent of Er, 0.05 percent to 0.6 percent of Sr, 1.0 percent to 3.0 percent of TiC / TiB2 and the balance of Al and inevitable impurities. The Al-Zn heat-treatment-free aluminum alloy provided by the invention is compact in structure, fine in crystal grain, uniform in solute element distribution and excellent in mechanical property, and can meet the application requirements of the fields of automobiles and spaceflight on aluminum alloy materials.

The invention belongs to the technical field of high-voltage electric appliance material preparation, and particularly relates to a zinc oxide resistor disc and a preparation method and application thereof. The preparation method comprises the following steps: (1) pre-sintering zinc oxide powder; (2) mixing the zinc oxide powder obtained in the step (1), an auxiliary agent and a dispersion liquid, and carrying out ball milling to obtain slurry; the particle size D50 of the slurry is 0.8-1.2 [mu] m, and the dispersity is greater than or equal to 95%; (3) performing spray drying and granulation on the slurry to obtain granulation powder; (4) carrying out molding and first sintering on the granulated powder to obtain a resistor disc semi-finished product; the first sintering adopts sectional sintering; and (5) forming an electrode layer on at least one surface of the resistor disc semi-finished product by adopting a vacuum sputtering and / or electrophoretic deposition process, and performing secondary sintering and annealing. The contact resistance of the zinc oxide resistor disc is less than or equal to 5m omega; and after 1000 hours of aging in a 85 DEG C + 85% RH environment, the leakage current increase is less than or equal to 2 [mu] A, and the performance degradation rate is less than or equal to 5%.

The utility model discloses a lightweight step bracket, which relates to the technical field of vehicle processing and production and comprises a vehicle end connecting part arranged at the upper end and connected with a cab, a step connecting part arranged at the lower end and connected with a step, and a support connecting part for connecting the vehicle end connecting part and the step connecting part, the vehicle end connecting part, the step connecting part and the supporting connecting part are each provided with a hollow weight reduction structure and a bent reinforcing structure. The vehicle end connecting part is matched and connected with the cab, and the step connecting part is fixedly connected with the step, so that the original function of the step bracket is met; meanwhile, the hollow weight reducing structures and the bending reinforcing structures are arranged on the vehicle end connecting part, the step connecting part and the supporting connecting part, so that the use performance requirement is met, the better lightweight index is achieved, the production cost is reduced, and the product performance is improved.

The invention relates to the technical field of aluminum alloys, in particular to a high-stress-corrosion-resistant Al-Cu-Mg alloy and a preparation method and application of a thick plate of the high-stress-corrosion-resistant Al-Cu-Mg alloy. The alloy comprises the following components in percentage by weight: 4.0-4.6% of Cu, 1.4-1.6% of Mg, 0.3-0.9% of Mn, less than or equal to 0.06% of Cr, less than or equal to 0.03% of Ti, less than or equal to 0.05% of Fe, less than or equal to 0.03% of Si, less than or equal to 0.15% of total impurity elements and the balance of Al, wherein the ratio of Cu to Mg is less than or equal to 3. According to the high-stress-corrosion-resistant Al-Cu-Mg alloy and the preparation method of the Al-Cu-Mg alloy thick plate, the content and the proportion of main alloy elements Cu and Mg are optimized, the content of a microalloy element Mn is controlled to be reasonably matched with the rolling temperature, the microstructure characteristics and the precipitated phase morphology and distribution are regulated and controlled, and the high-stress-corrosion-resistant Al-Cu-Mg alloy and the preparation method of the Al-Cu-Mg alloy thick plate are specially provided for the Al-Cu-Mg alloy thick plate for aerospace. The Al-Cu-Mg alloy thick plate has excellent stress corrosion resistance under the high stress condition, the production cost is low, the technological process is simple, and the excellent stress corrosion resistance can be obtained under the existing preparation condition.

The invention relates to a high-performance metal injection titanium alloy feed and a preparation method thereof, the high-performance metal injection titanium alloy feed comprises a metal powder mixture and a binder, the ratio of the binder to the metal powder mixture is (1.5-2.5): (7.5-8.5), the metal powder mixture comprises spheroidized titanium alloy powder, spherical reduced iron powder and rare earth metal yttrium powder, a trace amount of rare earth Y (yttrium) element is added, and the metal injection titanium alloy feed is prepared by mixing the spheroidized titanium alloy powder, the spherical reduced iron powder and the rare earth metal yttrium powder. Although the wax-based binder is low in cost and free of pollution, if a small amount of carbon element exists in a sample to influence the plasticity, the rare earth element and Y are added to react with the O element in the titanium alloy to generate Y2O3, the oxygen content in the titanium alloy is reduced, meanwhile, the generated Y2O3 plays a role in refining grains, and the strength and plasticity of the titanium alloy are improved. Therefore, the plasticity of the material is improved, the contradiction between the strength and toughness of the titanium alloy is balanced, and the comprehensive performance requirement of the high-strength and high-toughness titanium alloy is met.

The application provides an integrated aircraft refueling lamp, and belongs to the technical field of illumination design of an aircraft in-flight refueling system, and specifically comprises a shell assembly, a light source assembly, a driving assembly and a light source regulator, the shell assembly comprises a shell and first and second cavities arranged in the shell, the light source assembly is arranged in the first cavity, the driving assembly and the light source regulator are arranged in the second cavity, the light source assembly, the driving assembly and the light source regulator are sequentially connected, the light source assembly is provided with a refueling probe illumination mode and a conical sleeve floodlight illumination mode, the driving assembly is used for dividing voltage and controlling constant current, and the light source assembly is used for stabilizing input voltage when light intensity is changed. Through the processing scheme, the airborne equipment has the advantages of light weight, integration, low cost and simple control.

The invention provides a battery pack box body and a battery pack, and relates to the technical field of batteries, the battery pack box body comprises a cross beam assembly, the cross beam assembly comprises a cross beam main body and at least one first supporting beam, a plurality of cavities are formed in the cross beam main body, and inclined ribs are arranged in the cavities close to the bottom of the battery pack box body; one end of the first support beam is welded with the side wall of the cross beam main body deviating from the battery monomer to form a first welding seam and a second welding seam, the first welding seam extends along the second direction and is positioned at the upper part of the first support beam along the third direction, and the second welding seam extends along the third direction and is positioned at two sides of the first support beam along the second direction; the cross beam assembly has the advantages that the cross beam assembly is compact in structure, high in rigidity and relatively light in weight, and the vibration resistance of the cross beam assembly is improved.

An optimization design method of a double-tuned filter for a converter station comprises the following steps: calculating a total impedance function Z (omega) of the double-tuned filter; representing two tuning points of the filter through a full impedance function Z (omega) of the double-tuned filter, and defining an intermediate angular frequency of the double-tuned filter; the value of a high-voltage side capacitor C1 is determined according to the fundamental wave reactive compensation quantity QS1, and the values of L1, L2 and C2 are solved; and calculating the fundamental wave power loss of the medium resistor R of the double-tuned filter and the harmonic amplification coefficient H (omega) of the characteristic harmonic voltage of the AC filter of the converter station. And with the filtering performance, the resonance-free risk and the equipment investment cost as constraint conditions, the values of L1, L2 and C2 are optimized by adopting an optimization algorithm. According to the method, the optimal design process of an existing double-tuned filter topological structure for the converter station is analyzed in detail by considering the filtering effect and the harmonic amplification effect and combining the circuit principle, the filtering effect of the double-tuned filter for the converter station can be improved, and the harmonic resonance or harmonic amplification risk is avoided.

The application provides a kind of X80 grade high toughness high hydrogen-induced cracking resistance thick wall LNG receiving station seamless steel pipe steel and its heat treatment process, composition: C 0.03%~0.06%, Mn 1.30%~1.50%, Cr 0.20%~0.50%, Mo 0.40%~0.60%, Ni 0.20%~0.40%, V 0.080%~0.150%, Nb 0.010%~0.030%, Al 0.015%~0.025%, P≤0.012%, S≤0.008%, N 0.0060%~0.0100%, T.O≤0.0020%, the rest is Fe and other inevitable impurities, cooperate heat treatment process production, with good strength and toughness and hydrogen-induced cracking resistance performance.

The present invention discloses a preparation method and application of a thermosetting polyurethane modified drainage asphalt mixture. The mixture comprises 4 to 8 parts by mass of thermosetting polyurethane modified asphalt and 92 to 96 parts by mass of mineral material; the thermosetting polyurethane modified asphalt is obtained by reacting 40 to 60 parts by mass of base asphalt, 40 to 60 parts by mass of polyurethane prepolymer and 10 to 20 parts by mass of chain extender; the polyurethane prepolymer is a polyether prepolymer, and its active group NCO content is 11 to 13%. The preparation process of the mixture is: after heating and stirring the base asphalt, the polyurethane prepolymer is added to carry out a grafting reaction, and then the chain extender is added and stirred to react to obtain a thermosetting polyurethane modified drainage asphalt, and then the mineral material and the remaining raw materials are added in sequence and mixed evenly to obtain. Based on the excellent performance of the mixture, it is used to prepare a double-layer drainage pavement, which effectively solves the influence of blockage on the functionality of the voids in the prior art, and while exerting the anti-blocking performance, it can maximize its drainage performance.

The application relates to the technical field of building materials, and discloses a polymer composite mortar material for a waterproof layer of a building outer wall and a preparation method of the polymer composite mortar material, wherein the waterproof layer of the building outer wall comprises, in sequence from top to bottom, an interface treatment layer, a vitrified microbead mortar leveling layer, a bottom mortar layer in which glass fiber mesh cloth is embedded, a surface mortar layer and a polymer cement waterproof layer; the material of the surface mortar layer and the bottom mortar layer is the polymer composite mortar material. Through the technical scheme, the problems of heavy load, low bonding strength, poor crack resistance and easy falling of the waterproof layer of the building outer wall in the related art are solved.

The invention discloses an Al-Mg-Sc-Zr series aluminum-based composite powder and a preparation method and application thereof. The Al-Mg-Sc-Zr series aluminum-based composite powder consists of an Al-Mg-Sc-Zr series aluminum alloy powder, a Co-Cr-Ni medium-entropy alloy powder and an oxide bait powder; in the Co-Cr-Ni medium-entropy alloy powder, Co, Cr and Ni are in an equal molar ratio; in the Al-Mg-Sc-Zr series aluminum alloy powder, each component and its weight percentage are as follows: 1.0-5.0% of Mg, 0.3-1.0% of Sc, 0.05-0.35% of Zr, 0.05-0.5% of Mn, 0.1-0.2% of Si, 0.01-0.03% of Mo, and the rest is Al. The Al‑Mg‑Sc‑Zr aluminum-based composite material obtained by laser additive forming of the Al‑Mg‑Sc‑Zr aluminum-based composite powder of the present invention not only has high room temperature tensile strength, but also has good high temperature resistance. The tensile strength at 300°C can still reach more than 200 MPa, meeting the current performance requirements of aerospace heat-resistant aluminum alloy components.

The application relates to the technical field of high polymer materials, and discloses a nylon material and a preparation method and application thereof. The nylon material comprises the following preparation raw materials in percentage by mass: 70-85% of nylon resin, 8-15% of nitrogen-based flame retardant, 2-8% of phosphorus-based flame retardant and 1-8% of synergistic flame retardant. The nylon material provided by the application adds the phosphorus-based flame retardant and the synergistic flame retardant in a traditional nitrogen-based flame retardant system, so that the ignition temperature of the material is increased, the dropping speed and the dropping ignition probability are reduced, and the flame retardant performance of the material is improved. The ignition temperature of the material can reach 745 DEG C, the DSC crystallization temperature can reach 187 DEG C, the demolding effect is good, the dropping speed is slow, the dropping ignition probability is low, the performance requirements of a battery assembly product on the material can be met, and the nylon material can be used in the preparation of electronic connectors, battery compartments, low-voltage switches, housings or terminal blocks of power distribution systems of electronic and electrical equipment.

The invention discloses an effective refining method for a multi-phase structure of a weldable Ni3Al-based alloy, and belongs to the technical field of nickel-based alloy multi-phase structure regulation and control. The method comprises the following specific steps: carrying out laser remelting treatment on the weldable Ni3Al-based alloy at the speed of 1500-4500W-10mm / s by using an SMATLas Series 5M-6000W (China) type optical fiber laser generator, so that the structure of the weldable Ni3Al-based alloy is refined to a greater extent; the weldable Ni3Al-based alloy subjected to remelting treatment is placed in a high-temperature heat treatment furnace to be subjected to high-temperature aging treatment at the temperature of 940-1020 DEG C for 500 h; thermal stress after laser remelting is eliminated; carrying out furnace cooling treatment on the weldable Ni3Al-based alloy subjected to heat treatment; and finally, the weldable Ni3Al-based alloy with effectively refined multi-phase structures and excellent high-temperature mechanical properties is obtained. According to the weldable Ni3Al-based alloy prepared through the method, the beta phase size in a multi-phase structure is small, the shape tends to be nearly spherical and is evenly distributed, and the high-temperature mechanical property is remarkably improved.

The utility model discloses a filter support, including fixed frame, two active elements, two driven module and transmission part. Active element and driven module all are opposite fixed frame mobile setting, and transmission part is opposite fixed frame rotation setting. Two active elements and two driven module are along annular arrangement, and a driven module is located between two active elements. Active element and transmission part transmission connection, and driven module also with transmission part transmission connection. When active element is opposite fixed frame mobile, can drive transmission part opposite fixed frame rotation, and then promotes driven module to move to the same mobile direction with active element. The structure realizes the cooperation of active element and driven module through transmission part, improves the adjustment flexibility, can better adapt to different caliber lens, reduces the dark corner, satisfies the diversified shooting demand.

This invention relates to the field of resource utilization technology for waste soil and discloses a method for combined lithium slag and carbide slag electroosmosis reinforcement of waste soil. The method involves mixing lithium slag and carbide slag in a specific ratio with waste soil to form modified soil with low moisture content, which is then cured using an electroosmosis device to achieve rapid reinforcement and resource utilization of the waste soil.

The utility model discloses a shell assembly, a battery, a battery pack and electric equipment. The shell assembly comprises a first shell, a second shell and an insulating part, the first shell is provided with a first cavity, the second shell is provided with a second cavity, and the insulating part is provided with a third cavity. The insulating part is provided with a first connecting part and a second connecting part. The first shell and the second shell are provided with a first matching part and a second matching part respectively. The first connecting part is provided with a first annular groove, and the second connecting part is provided with a second annular groove. The first matching part is fixed to the first annular groove, and the groove wall face of the first annular groove abuts against the outer circumferential face and the inner circumferential face of the first matching part. The second matching part is fixed to the second annular groove, and the groove wall face of the second annular groove abuts against the outer circumferential face and the inner circumferential face of the second matching part. The first cavity, the third cavity and the second cavity are communicated to form a containing cavity. The battery has the advantages of fewer structural parts, simple structure, low cost and better sealing performance.

The invention discloses an antibacterial packaging material as well as a preparation method and application thereof. The antibacterial packaging material is prepared from pineapple leaf fiber carboxymethyl cellulose, carboxymethyl cellulose, cationic starch, 3-hydroxyl octoate, alpha-tocopherol, dimethylbiguanide hydrochloride, a plasticizer, nitrogen-doped carbon quantum dots, plant essential oil, nano zeolite powder, carvacrol and citric acid. The preparation method comprises the following steps: dispersing the cationic starch in the deionized water, dispersing the pineapple leaf fiber carboxymethyl cellulose and carboxymethyl cellulose in the deionized water, completely dissolving, adding into a starch solution, sequentially adding the rest components, uniformly mixing, heating, reacting, forming a film, and drying to obtain the packaging material. According to the antibacterial packaging material, the cationic starch, the carbon quantum dots, the plant essential oil and other related components are combined for the first time to form a novel antibacterial packaging material, the antibacterial performance is remarkably improved and kept for a long time through the synergistic effect of all the components, and the antibacterial packaging material is high in material stability, simple and convenient in preparation process, low in cost and high in application and popularization value.

The invention discloses a nitride ceramic particle reinforced electric vehicle battery pack bottom protection plate and a manufacturing method thereof, and belongs to the field of electric vehicle battery technology and vehicle manufacturing. According to the method, a CrMoAl steel sheet is adopted, the surface of the sheet is polished to remove the oxidation condition, nitriding process treatment is conducted in a gas nitriding furnace, a sample is taken out after the sample is cooled to the room temperature along with the furnace, and the nitride ceramic particle reinforced electric automobile battery pack bottom protection plate is obtained. Ultra-deep nitriding layers are formed on the two sides of the steel plate through nitride ceramic particle reinforcement, a non-nitriding layer is formed in the middle of the steel plate, and a nitriding layer-non-nitriding layer-nitriding layer sandwich structure is formed; due to the existence of the double-layer nitriding layer and the middle non-nitriding layer, the steel plate has high hardness and obdurability at the same time, when the steel plate is applied to the electric automobile bottom protection plate, the conditions of gravel splashing, road surface fluctuation and bumping and the like caused by the external environment can be borne, and damage to a battery pack due to the conditions of bending, breakage and the like of the steel plate can be prevented.

The application provides a preparation method of homopolypropylene and the homopolypropylene. The preparation method comprises the following steps: adding propylene, a first catalyst, a second catalyst and a modifier into a first reactor of a double-loop reactor to perform a first polymerization reaction, and introducing hydrogen into the first reactor to obtain a first reaction product; adding a solid phase part in the first reaction product into a second reactor of the double-loop reactor to perform a second polymerization reaction, and obtaining a second reaction product; obtaining a solid phase part in the second reaction product and performing preset treatment to obtain a homopolypropylene base material; and mixing the homopolypropylene base material with a beta nucleating agent, and then performing extrusion granulation to obtain the homopolypropylene. The impact strength index and the load heat deformation temperature index of the homopolypropylene prepared by the method are simultaneously improved, and the performance requirements of filter plates of filter presses, power conduits and the like are met.

The utility model discloses a rear parallel type diesel engine air filter device which comprises a plurality of air filters, an outer side connecting pipe, an inner side connecting pipe and vortex exhaust gas. The air filters are horizontally arranged in parallel and arranged above the rear side of the engine body with air inlets facing backwards. The outer side connecting pipes are horizontally arranged above the two sides of an engine body, one end of one outer side connecting pipe is connected with an air outlet of one air filter located on the outer side, and the other end of the outer side connecting pipe is connected with the air inlet end of one supercharger away from one end of the air filter. The inner side connecting pipes are horizontally arranged above the inner side of an engine body in parallel, one end of one inner side connecting pipe is connected with an air outlet of the air filter located on the inner side, and the other end of the inner side connecting pipe is connected with the air inlet end of the supercharger close to one end of the air filter. And the after-vortex exhaust device is arranged between the after-vortex air outlet end of the supercharger far away from one end of the air filter and the after-vortex air outlet end of the supercharger close to one end of the air filter. Therefore, the occupation of the whole engine in the height space direction can be greatly reduced.

The present invention relates to the technical field of waste mud treatment, and in particular to a waste mud dehydration-oxidation-solidification integrated treatment device and method. The device includes a top plate, a piezoelectric filter cloth, a panel, a rotor, a support frame, and a bottom plate. The upper and lower ends of the support frame are respectively connected to the top plate and the bottom plate to form a rotating mechanism. The rotor is connected to the bottom plate, the piezoelectric filter cloth is fixed on both sides of the support frame, and the panel is arranged on the outside of the rotating mechanism. A drain pipe is provided on the panel. The present invention can organically combine the current inefficient and isolated treatment methods such as solidification, filter press dehydration, and oxidation, greatly improve the dehydration rate of the waste mud, and improve the mechanical properties of the mud after dehydration, meeting the performance requirements of the rolling filler; the piezoelectric principle is used to degrade and oxidize the organic matter and microorganisms in the waste mud, so that the filtrate can be discharged without secondary treatment, or the secondary treatment cost of the filtrate is reduced.

The invention relates to the technical field of polymer chemistry, in particular to a water-based acrylic emulsion and a preparation method thereof.The preparation method comprises the following steps that water and an emulsifier A are mixed according to the formula ratio, and a kettle base solution is obtained; dropwise adding the core emulsion and an initiator A solution into the kettle bottom solution, and keeping the temperature at 82-85 DEG C to obtain a first reaction solution; dropwise adding a nucleation emulsion and an initiator B solution into the first reaction solution, and keeping the temperature at 82-85 DEG C to obtain a second reaction solution; and dropwise adding the shell emulsion and the initiator C solution into the second reaction solution at 84-86 DEG C, and carrying out heat preservation at 86-88 DEG C to obtain the water-based acrylic emulsion. The acrylic emulsion with a three-layer core-shell structure is prepared according to the principle of soft inside, medium hard and soft outside, so that the prepared paint surface combines rigidity and softness, is hard and sufficient in toughness, and meets the performance requirements of the finish paint in the water-based automobile coating.

This invention relates to the field of manganese-zinc ferrite materials technology, and discloses a wide-temperature, low-loss, high-Bs manganese-zinc ferrite material, comprising a main component and auxiliary components. The main component consists of Fe2O3, ZnO, and MnO, while the auxiliary components consist of Co2O3, Ca2CO3, Nb2O5, ZrO2, SiO2, NiO, SnO2, and TiO2. The total amount of auxiliary components relative to the main component is calculated as a weight percentage. This invention compensates for the magnetocrystalline anisotropy constant K1 of the ferrite matrix by adding multiple auxiliary components and optimizing the combination of their addition amounts. This reduces the magnetocrystalline anisotropy constant K1 over a wide temperature range, achieving characteristics such as wide-temperature, low-loss, and high Bs. By controlling the addition range of the main and auxiliary components, the process enables the manganese-zinc ferrite to possess both low-loss and high-Bs characteristics at different temperatures.

The invention discloses a thin-wall hemispherical structure part and a heat treatment method for effectively controlling deformation, and relates to the field of deformation control in the quenching process, and the heat treatment method comprises the steps that the thin-wall hemispherical structure part is heated to 906 DEG C in heating equipment, the heat preservation time is 30-35 min, and the heated thin-wall hemispherical structure part is obtained; and the heated thin-wall hemisphere structure part is taken out of the heating equipment, so that the heated thin-wall hemisphere structure part keeps the hemisphere opening face to be perpendicular to the water surface to enter the water vertically, and stays in the water for 20-26 seconds. And the qualified rate of parts is greatly improved, the production period is shortened, and the production cost is reduced.