39results about How to "Small dispersion" patented technology

The invention discloses a data compression method and device, equipment, a medium and a product, and the method comprises the steps: obtaining a brightness compensation value of a display panel, and the brightness compensation value comprises a compensation value of the brightness of a sub-pixel of the display panel at a target gray scale; calculating an average value of the compensation values of the brightness of the sub-pixels; respectively calculating a difference value between the brightness compensation value of each sub-pixel and the average value to obtain difference data; and performing coding compression on the differential data and the average value to obtain compressed data. According to the embodiment of the invention, the memory occupied by the compressed data of the display panel can be reduced.

The invention discloses an urban rail transit abnormal passenger flow prediction method and system based on artificial intelligence, and relates to the field of passenger flow prediction. According to the method, the SVM machine learning model is trained and tested by adopting the classified historical abnormal passenger flow data of the station, the historical data of the natural influence factors and the historical data of the social influence factors, so that a relatively accurate classification model is provided for subsequent classification; secondly, collecting real-time data of different types of natural influence factors, real-time data of social influence factors and real-time passenger flow data of different rail transit stations in real time, and continuously updating the final SVM classification model so as to adapt to continuously changed behavioral habits and modes of people; the accuracy of subsequently classifying the predicted data is improved; indirect prediction is carried out on the passenger flow volume data through the predictable natural influence factor data and social influence factor data, and the prediction accuracy is improved.

The invention provides an electrostatic trap ion implantation device and method, the electrostatic trap ion implantation device comprises a power supply and a multi-pole rod, and the power supply applies a radio frequency voltage to the multi-pole rod; the plurality of annular electrodes are arranged on the outer side of the multi-pole rod and are sequentially arranged in the direction parallel to the ion transmission direction in the multi-pole rod; the part on the inner side of the annular electrode enters the area between the adjacent electrode rods; the inlet electrode and the outlet electrode are respectively arranged at an ion inlet and an ion outlet of the multi-pole rod, and the power supply applies voltage to the inlet electrode, the outlet electrode and the annular electrode. The method has the advantages of good ion focusing effect and the like.

The invention discloses a method for realizing parallel switching of battery clusters through automatic cluster switching and automatic cluster switching, which comprises the following steps of: adding cluster contactors: on a direct current side of an energy storage system, when a plurality of clusters are connected in parallel, adding the cluster contactors as a control unit, and reducing direct current circulating current loss among the clusters; when the energy storage system is about to complete charging, a high-voltage cluster is cut, and a low-voltage cluster is continuously charged; when the discharge of the energy storage system is about to be finished, the low voltage cluster is switched, and the high voltage cluster is continuously discharged; performing cluster floating charge management; detecting the voltage of each cluster after charging or discharging is finished; the method has the beneficial effects that the problems in the prior art are effectively solved by additionally arranging the cluster contactor, formulating a BMS cluster cutting and cluster throwing strategy and performing cluster floating charge management, the efficiency of the energy storage system and the consistency of the battery cells are improved, the dispersion of the voltage of the battery cells is reduced, and the method has remarkable technical progress and practical application value.

The application discloses an automatic riveting device and method for a launch engine nozzle cover, and belongs to the technical field of engine nozzles. The device comprises a riveting base, an X / Y module, a first rotating platform, a riveting positioning tool, a rotating cylinder, a stand, a Z-axis module, a second rotating platform, a precise force control push rod and a riveting head. The nozzle seat is arranged on the riveting positioning tool, and one nozzle cover to be riveted is arranged on each supporting column of the riveting positioning tool. The automatic riveting method is adopted, a plurality of launch engine nozzle covers can be riveted at one time, the working efficiency is greatly improved, and the speed, the pressure, the stroke and other parameters can be adjusted, and the riveting quality consistency of the nozzle cover is improved.

The invention discloses a refrigerant dynamic charging process based on complete machine simulation operation, and belongs to the technical field of air conditioners and heat pumps. The problem that existing refrigerant charging depends on a static target value and cannot adapt to system individual differences and working condition changes in a self-adaption mode is solved. According to the process, a digital twinborn simulation model of a to-be-charged air conditioning system is constructed, the system is started to operate under a preset simulation working condition, and a first operation parameter is collected to initialize and calibrate the model; dynamically filling the refrigerant according to a preset step length, continuously collecting a real-time second operation parameter, and feeding the real-time second operation parameter back to the model; on the basis of real-time data, the model performs online fitting on a changing curve of parameters such as the supercooling degree and the superheat degree along with the charging amount, and predicts the refrigerant amount when the energy efficiency ratio of the system reaches the optimal as the optimal charging target; and when the parameters collected in real time and the extreme value region predicted by the model converge, it is judged that filling is completed. According to the system and the method, 'tailoring 'type dynamic accurate charging aiming at each specific air conditioning system is realized, and the charging precision and the system operation energy efficiency are remarkably improved.

The invention relates to a preparation method of a high-strength and high-toughness coating rod type insulator for a high-speed rail contact net, and relates to the field of electrified traffic of high-speed railways. The high-strength and high-toughness coating rod type insulator comprises a porcelain insulator main body and an integrated metal flange body formed by an ETV coating and the porcelain insulator main body, the porcelain insulator main body is prepared by mixing calcined high bauxite, feldspar, kaolin, zirconite, quartz, cordierite, ceramic short fibers, clay and the like, adding the mixture into a ball mill, uniformly mixing to form slurry, sieving to remove iron, squeezing the slurry, pugging the slurry, performing high-pressure vacuum treatment, mechanically pressing to form a blank, cutting, drying, glazing, and firing at a high temperature of 1250 DEG C. The porcelain insulator main body is prepared by the steps of appearance detection, good quality detection and the like. By adopting a zirconium-aluminum composite ceramic matrix preparation technology, the composite material has the characteristics of high density, high strength, good toughness and small dispersity, the bending load tolerance strength is greater than or equal to 25KN / cm < 2 >, the torque load is greater than or equal to 15KN. M, and the composite material can completely meet the technical requirements of use of porcelain insulators in high-voltage power transmission grids of high-speed railways.

The present application relates to the technical field of water body bacteria inactivation, and particularly relates to a bacteria inactivation method based on micro-nano bubble ozone synergistic reaction, comprising the following steps: mixing and conveying ozone gas dissolved water and initial sewage to a front reactor to output as dissolved air sewage; conveying the dissolved air sewage to a reaction tank; obtaining the pressure of a plurality of pressure sampling positions of a conveying pipeline conveying the dissolved air sewage; determining the merging state of micro-nano bubbles in the conveying pipeline; determining an abnormal area in the merging state of the micro-nano bubbles; determining the bubble merging amount of the abnormal area based on the obtained conveying pipeline pressure of the position where the connecting port is located and the average pressure in the conveying pipeline behind the connecting port; determining the dosing amount of alkaline substances and the replenishment amount of the dissolved air water; and continuously conveying the dissolved air sewage from the front reactor to the reaction tank to complete the bacteria inactivation operation, so that the cavitation effect of ozone micro-nano bubbles is strengthened and the solubility of ozone in water is improved.

The invention discloses enterococcus faecium, a microbial inoculum as well as application and a method of the enterococcus faecium, the enterococcus faecium is enterococcus faecium TC3 and is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number of the enterococcus faecium is CCTCC NO: M 20242431. The invention also provides a microbial inoculum, wherein the microbial inoculum contains the enterococcus faecium TC3, and the enterococcus faecium TC3 can be used for preparing the microbial inoculum. Before a healthy pig is inoculated with a porcine reproductive and respiratory syndrome vaccine, the enterococcus faecium TC3 or the microbial inoculum is fed to the healthy pig, and then the healthy pig is inoculated with the porcine reproductive and respiratory syndrome vaccine, so that the effect performance of the pig inoculated with the porcine reproductive and respiratory syndrome vaccine can be improved, the antibody positive rate of the pig inoculated with the porcine reproductive and respiratory syndrome vaccine is increased, and the economic benefit of the pig is improved. The protection rate of the pigs inoculated with the porcine reproductive and respiratory syndrome vaccine is increased, the antibody dispersion of the pigs inoculated with the porcine reproductive and respiratory syndrome vaccine is reduced, and the survival rate of the pigs infected with the porcine reproductive and respiratory syndrome virus after the pigs inoculated with the porcine reproductive and respiratory syndrome vaccine is increased.

The present invention provides a polyamic acid film, a rod-shaped silver powder / polyimide composite film and a preparation method thereof, and relates to the field of antistatic materials. The preparation method first prepares a polyamic acid solution and a first silver powder, and then successively coats the first silver powder with vinyl triacetoxysilane and 12-hydroxystearic acid to obtain a second silver powder; finally, the second silver powder is added to the aforementioned polyamic acid solution, a film is formed by a casting method, and then heat-treated to obtain a polyamic acid film with processability. The film is treated in a vacuum environment of 280-300°C for 4-5h to obtain a rod-shaped silver powder / polyimide composite film, the bottom of the composite film is uniformly precipitated and enriched with rod-shaped silver powder, and the silver powders overlap each other to form a three-dimensional mesh conductive structure, so that the upper and lower surfaces of the film have different surface resistances, and the composite film can be applied to electrostatic dissipation or electrostatic conduction according to the surface resistance of the silver powder enriched surface.

The invention discloses a galvanization treatment process for steel wire rope production and processing. The galvanization treatment process comprises the following steps: preparing a steel wire rope needing galvanization processing; preparing a zinc sulfate salt solution; the steel wire rope subjected to surface treatment is subjected to annealing treatment; electroplating is started, the prepared steel wire rope is put into an electroplating pool, and the steel wire rope is connected with a cathode; the method comprises the following steps: taking up a wire after electroplating is completed, washing with hot water in the take-up process, then drawing a steel wire rope, controlling the concentration and current density of an electroplating solution in the electroplating process, optimizing the process, controlling the quality of all electro-galvanized layers to be 80-90g / m < 2 > when batch production is carried out on electro-galvanized steel wires with the diameter of 0.8 mm, and ensuring that the quality of the zinc layers is small in scattering difference. And not only is the quality of the zinc layer surface of the raw material steel wire for electrogalvanizing the rope effectively controlled, but also unnecessary waste is reduced, and the production cost is reduced.

The application provides a user-side micro-grid load regulation method, system and equipment based on artificial intelligence, and relates to the technical field of micro-grid management.The method comprises the following steps: analyzing multi-dimensional heterogeneous data to obtain load time series data, and determining the demand weight of each user according to power demand data through an analytic hierarchy process; processing the load time series data through empirical mode decomposition to obtain intrinsic mode function components; dynamically predicting the intrinsic mode function components, and obtaining a multi-modal load prediction result by weighting and fusing the prediction results through an attention mechanism; optimizing the multi-modal load prediction result in combination with the operation target of a micro-grid cluster to generate a basic load regulation strategy of the micro-grid cluster; and generating a final regulation strategy corresponding to each user in combination with the demand weight corresponding to the user according to the basic load regulation strategy, and regulating the final regulation strategy. The application significantly improves the regulation accuracy of the user-side micro-grid load.

The purpose of the present invention is to provide a novel technique for improving exhaust gas purification performance by imparting NOx adsorption performance to a Pt-containing catalyst layer while suppressing a decrease in Pt dispersibility, and to provide an exhaust gas purification catalyst composition containing Pt and Mg, the mass of the exhaust gas purification catalyst composition being less than or equal to the mass of the catalyst composition, the mass of the Mg being less than or equal to the mass of the catalyst composition, and the mass of the Mg being less than or equal to the mass of the catalyst composition. And the amount of Mg in terms of metal is from 2.0% by mass to 9.0% by mass (inclusive).

This invention discloses a method for hydrothermal cycling testing and performance degradation prediction of resin-based composite materials. The method first constructs a standard hydrothermal cycling test system for resin-based composite materials; secondly, it simultaneously acquires the glass transition temperature (GTH) and macroscopic mechanical property parameters of the material at different aging cycles using this system; then, it establishes a degradation function relationship between the GTH and hydrothermal environmental conditions (temperature, relative humidity, number of cycles); further, it constructs a quantitative mapping model between the GTH and key macroscopic mechanical properties (such as modulus and strength); finally, it integrates the above models to achieve quantitative prediction of the composite material's performance degradation process based on a known environmental spectrum. This invention connects the process from environmental excitation to microscopic evolution and then to macroscopic failure, providing accurate performance degradation prediction and offering a scientific basis for the engineering application of resin-based composite materials under different hydrothermal cycling conditions.

This invention belongs to the field of nanomaterial preparation technology, specifically disclosing a method for preparing ultrasmall selenium nanomaterials using physical vapor deposition (PVD) and its applications. This method involves placing selenium powder and sodium chloride in a tube furnace and performing gradient temperature-controlled vapor deposition under an inert gas environment to prepare ultrasmall selenium nanomaterials with a particle size of 2-5 nm. Compared to traditional solution methods, this process avoids the use of organic solvents, and post-processing only requires dissolution and centrifugation purification. It has advantages such as large-scale production capability, high product purity, and short preparation time (30 min), making it suitable for large-scale production. The ultrasmall selenium nanomaterials prepared by this invention have significant application potential in sodium-ion batteries, optoelectronic devices, immunotherapy, and selenium fertilizers (quantum dot selenium bio-fortifiers).

The invention discloses a preparation method of a high-performance flow modifier. The preparation method comprises the following steps: preparing a modified silicon oxide coated carbon nanotube material; carrying out graft modification on the modified silicon oxide coated carbon nanotube material by taking acrylamide, AMPS and sodium alpha-olefin sulfonate as monomers to obtain a polymer graft modified silicon oxide coated carbon nanotube material; carrying out graft modification on the modified cellulose nanocrystal by taking acrylamide, acrylic acid, nonylphenol ethoxylate and 4-vinyl biphenyl as monomers, so as to obtain a polymer graft modified cellulose nanocrystal; and mixing and grinding the polymer graft modified silicon oxide coated carbon nanotube material and the polymer graft modified cellulose nanocrystals to obtain the high-performance flow modifier. The prepared flow modifier can effectively improve the flowability of the polycyclic aromatic hydrocarbon material at normal temperature and low temperature, the application field of the polycyclic aromatic hydrocarbon material is greatly expanded, and the added value of the product is improved.

The invention discloses a manufacturing method suitable for an alloy foil resistor. The manufacturing method comprises the following steps: 1, curing a substrate and pasting a film; 2, pattern transfer; 3, developing, etching and removing the film; 4, printing a protective layer before rack plating; 5, exposing and developing the protective layer before rack plating; 6, rack plating; 7, plating bridge cutting; 8, precisely adjusting the resistance; 9, printing a protective layer; 10, marking and printing; 11, the protection layer mark is cured; 12, laser scribing; 13, performing primary segmentation; 14, performing vacuum sputtering; 15, carrying out secondary segmentation; sixthly, barrel plating of copper, nickel and tin is conducted. According to the invention, by introducing an innovative alloy foil resistor manufacturing process, the resistance precision of the alloy foil resistor is greatly improved, the purpose of automatic resistance adjustment of the high-precision alloy foil resistor is achieved, and the stability and consistency of the product are improved.

The present application relates to the drilling fluid with the anti-sloughing agent and preparation method, the total mass is 100% by mass percentage, is composed of the following components: lipophilic natural asphalt material 60-75%, hydrophilic compound material 10-15%, reinforcing agent 5-8%, oil phase dispersing agent 2-3%, lubricating film forming agent 1-2%, initiator 0.5-1.0%, regulator 0.5-1.0%; The lipophilic natural asphalt material is compounded by Karamay natural rock asphalt and Sichuan Qingchuan natural lake asphalt according to the mass ratio (6-8):(2-4); The hydrophilic compound material is compounded by 2-acrylamide-2-methylpropane sulfonic acid and hydroxyethyl cellulose according to the mass ratio (3-5):(1-2); The present application has the advantages of good oil-based compatibility, excellent plugging and anti-sloughing effect, simple process, low cost, stable performance, convenient use, pressure resistance, durability and stability.

This invention provides a titanium alloy with a three-phase microstructure and its preparation method. The method includes: treating the titanium alloy with pulsed current followed by heat treatment in a heat treatment furnace. This invention combines pulsed current treatment with conventional heat treatment, overcoming the barrier of high-density dislocations required for the formation of a three-phase microstructure. Only two steps are needed to successfully prepare a three-phase microstructure within the titanium alloy, achieving a short-process and rapid preparation of a three-phase microstructure. The net shape of the sample obtained after treatment by this invention remains unchanged, ensuring that the net shape of the workpiece is not damaged while obtaining a titanium alloy with a three-phase microstructure. The three-phase titanium alloy obtained by this invention exhibits excellent strength and plasticity, with a tensile strength of 1100-1130 MPa and an elongation of 18.5%-23%.

The invention discloses an MOF confinement precious metal composite material and a preparation method and application thereof.The preparation method comprises the steps that zircon salt and / or hafnium salt are / is dispersed in a mixed solvent of N, N-dimethylformamide and ethyl alcohol, and a metal salt solution is prepared; dispersing precious metal precursor powder in ethanol to prepare a precious metal precursor solution; and then uniformly mixing the metal salt solution with a noble metal solution, adding monobasic organic acid and 2-aminoterephthalic acid, and stirring for reaction to prepare the MOF confinement noble metal material. The catalyst is mild in preparation reaction condition, simple in process and high in yield, is suitable for efficiently catalyzing and purifying formaldehyde pollutants in air at normal temperature, and has a wide application prospect.

The invention relates to the technical field of analog integrated circuit design, and discloses a GPIO (General Purpose Input / Output) control circuit and a chip, and the GPIO control circuit comprises a voltage stabilizer circuit, a power-on reset circuit and a detection circuit. The voltage regulator circuit is configured to output a voltage signal; the power-on reset circuit is connected with the voltage stabilizer circuit and is configured to output a control signal with time delay according to the voltage signal; the detection circuit is connected with the power-on reset circuit and the GPIO interface and is configured to output an indication signal under the action of the control signal, and the indication signal is used for indicating the working state of the GPIO interface. By setting the control signal with time delay, it can be ensured that power-on of the voltage signal is completed within the time delay duration, and then the corresponding control signal is output, so that the detection circuit outputs the indication signal to indicate the GPIO interface to work. Therefore, when the GPIO interface starts to work, the power-on of the voltage signal is completed, so that the problem of power failure in the power-on process of the voltage signal is solved.

This invention discloses an efficient magnetic domain refinement method for ultra-low loss oriented silicon steel, relating to the field of steel material technology. The method includes: raw material preparation; hot rolling and final rolling; multi-stage thermomechanical processing; controlled suppression phase formation; secondary re-junction and magnetic field-induced selective growth; surface microstructure fabrication; low-temperature domain refinement annealing and alternating magnetic field coupling; segmented cooling and quality inspection. This invention, through controlled nanoscale suppression phase engineering, forms a high-density and uniform nanoscale suppression phase within the matrix, serving as pinning sites for grain boundaries and subgrain boundaries. This controls grain boundary migration dynamics during high-temperature secondary re-junction, overcoming the problems of abnormal grain growth and microstructure instability caused by uneven distribution and large size dispersion of traditional suppression phases. This avoids the root cause of large magnetic domains, improves the controllability and repeatability of the secondary re-junction process, obtains a more uniform orientation grain size distribution, and reduces localized magnetic domain enlargement and iron loss fluctuations caused by uneven grain size.

The application discloses a donkey skin oligopeptide, and an application thereof. The amino acid sequence of the donkey skin oligopeptide is selected from Glu-Thr-Trp-Arg or Ala-Tyr-Phe-Pro-Lys. The donkey skin oligopeptide disclosed by the application has alpha-glucosidase and alpha-amylase inhibitory activity, can assist in reducing blood sugar, has very important significance for developing medicines with blood sugar reducing function, and can be used for preparing alpha-glucosidase, alpha-amylase inhibitors and anti-type 2 diabetes drugs.

This invention relates to the field of electronic clock technology, specifically disclosing a method and system for calibrating the timing accuracy of electronic clocks based on data fitting. The method includes: based on the timing characteristics of the electronic clock, performing temperature difference mapping on the extreme value offset of the jitter amplitude distribution set to solve for the sensorless temperature estimate; combining the nominal period of the real-time pulse segment sequence of the electronic clock, matching and calibrating the temperature estimate to establish a temperature-offset mapping table; performing temperature difference mapping again on the current pulse segment to obtain the real-time temperature estimate, and obtaining the interval reference offset based on the interval positioning of the mapping table; configuring a compensation step size for the jitter amplitude according to the reference offset, generating a dynamic compensation step size, and adjusting the phase of the accumulated count value to obtain the single-cycle refresh value; using this as a correction reference, performing timing calibration on subsequent pulses of the electronic clock, and outputting the final working signal of the electronic clock; this invention can improve the timing accuracy and temperature tracking response capability of electronic clocks under conditions without an external temperature sensor.

The application discloses a coal bed gas well full life cycle monitoring system based on a distributed optical fiber sensing technology, which comprises a laser generator, a modulator, a circulator and an optical cable which are sequentially connected, and a demodulator which is further connected to the circulator; the optical cable is arranged on the outer wall of a production casing of a coal bed gas horizontal well; the optical cable is arranged on the outer wall of the production casing of a non-perforated well section of a horizontal section in a spiral angle of 30 degrees; and the optical cable is arranged on the outer wall of the production casing of a perforated well section of a casing horizontal section in parallel. The application has the advantage of "one cable for multiple purposes", that is, one set of permanent optical fiber system replaces multiple traditional monitoring technologies. Comprehensive monitoring can be realized, and each link from drilling to gas production and even subsequent coal mining influence is covered. Through one set of system and method, multiple parameter information related to coal bed gas exploitation and coal mining can be obtained, and the problem of incoherent data and integration difficulty among different monitoring methods is avoided.

The embodiment of the present application discloses an exposure device and a combined mask thereof, wherein the combined mask comprises a first metal layer, a plurality of first light transmission holes are formed in the first metal layer; a second metal layer is arranged opposite to the first metal layer, a plurality of second light transmission holes are formed in the second metal layer, and the second light transmission holes are arranged corresponding to the first light transmission holes along an optical axis. The present application filters the oblique light in the light beam through the multiple metal layers, ensures that all the light rays in the light beam propagate along the optical axis direction, increases the parallelism of all the light rays in the light beam, makes the dispersion of the laser beam lower, and further enables the laser beam to perform accurate etching under a large gap. The technical problem that the parallelism of the light path of the current proximity exposure machine is not high in the prior art, the formed laser beam is relatively dispersed, and a lower gap needs to be used is solved.

The invention discloses a development suite performance test system and method based on data analysis, and relates to the field of performance test data processing. A to-be-tested development suite is tested from two aspects of single performance test and comprehensive performance test; the test result is more accurate and comprehensively reflects the performance of the to-be-tested development suite; the method comprises the following steps: firstly, carrying out single performance test on a to-be-tested development suite to judge whether some performances of the to-be-tested development suite independently meet the test requirements of a certain test sub-item; then clustering operation is performed on the test parameter comprehensive data set matrix, the test sub-items which are similar in test condition and do not conflict with one another are clustered into one class, and then the multiple test sub-items clustered into one class are adopted to test the development suite to be tested at the same time, so that the comprehensive anti-interference capability of the development suite to be tested can be detected. And the performance detection is finer, more comprehensive and more accurate.

The invention discloses a cTnI electrochemical detection kit based on a nano material and SI-RAFT, a use method and application. A nano material MoS2 / CuS-Au is used as a substrate material, Apt1 is automatically assembled on an electrode through an Au-S bond, and cTnI is specifically recognized and captured. Then, the Apt2 on the Apt2-CPAD is connected to cTnI through specific recognition, a sandwich structure of Apt1-cTnI-Apt2 is formed, and then a large number of monomers with aldehyde groups are grafted to the electrode through SI-RAFT polymerization. And then Ag < + > is reduced into AgNPs by means of a silver-ammonia solution, and the AgNPs are deposited on the surface of the electrode in situ. And finally, recording the response value of the oxidation current by using the SWV to realize high-sensitivity detection of the target object. Under the optimal condition, the current intensity and the logarithm of the cTnI concentration show a good linear relationship, and the detection limit is as low as 10.83 fg.mL <-1 >. Experimental results show that the method has good selectivity and stability, is simple to operate and low in cost, and is expected to be popularized in detection and clinical application of other target objects.

This invention discloses a 635MPa grade niobium-vanadium-chromium composite reinforced high-performance steel bar and its smelting method. By controlling the chemical composition and V / N mass ratio of the steel bar within the range of 3.35 to 3.75, and employing a multi-element composite strengthening formula of niobium, vanadium, and chromium to replace the traditional single vanadium-nitrogen alloy addition mode, production costs are reduced. During the smelting process, a dedicated dry powder stirring device is used to pre-mix the microalloying reinforcing agent, achieving uniform mixing of powder components and removal of magnetic impurities. Simultaneously, a composite desulfurizing agent is introduced and a step-by-step addition process is adopted, combined with a gradient ladle bottom-blowing argon stirring system, to effectively reduce the sulfur content in the steel. The steel bar prepared by this invention has a uniform microstructure, high grain size, and excellent mechanical properties such as tensile strength, yield strength, strength-to-yield ratio, and elongation. It exhibits good product consistency, low production costs, and can stably mass-produce high-performance 635MPa grade high-strength earthquake-resistant steel bars.

The present application relates to the technical field of precision forming of high-temperature alloy, and particularly relates to a preparation method of an engine piston ring, which comprises the following steps: reserving a machining allowance according to the size of the finished engine piston ring, calculating the diameter of the round wire through a formula d=(w+1.4h) / k, and preparing the round wire in a solid solution state; after a plurality of passes of controlled cold rolling, low-speed drawing with a flat wire drawing die with a partition structure, and double-plane wheel straightening, the single-layer rectangular piston ring blank is obtained through room-temperature winding and slitting; the evolution of the precipitated phase is precisely controlled through two-stage gradient aging heat treatment, and finally the finished engine piston ring is obtained through mechanical polishing and passivation treatment. The present application can significantly improve the size precision and yield of the piston ring, effectively improve the high-temperature creep resistance and elastic stability, and is suitable for the high-temperature service requirement of high-end power equipment due to the controllable process and easy scale production.