67 results about "Three stage" patented technology

This invention discloses a heat treatment process for reducing the fracture sensitivity of 20Mn2A circular link chains, comprising the following steps: (1) Pretreatment: heating to 650±10℃ at a rate of 4.8-5.2℃ / min in a vacuum annealing furnace, holding for 1-3 hours, and then cooling to room temperature in the furnace; (2) Graded quenching; (3) Two-stage tempering: the first stage is low-temperature tempering: holding at 200-210℃ for 2-3 hours, followed by oil cooling; the second stage is medium-temperature tempering: holding at 380-400℃ for 1-2 hours, followed by oil cooling. This invention, through a scientific three-stage treatment, achieves an optimized match between the strength and toughness of 20Mn2A circular link chains, with the specific objectives being: tensile strength ≥1050N / mm², low-temperature impact energy at -40℃ ≥48J, and internal residual stress ≤85MPa, significantly reducing fracture sensitivity and extending service life.

A memory system includes a storage controller, a memory, a first level filter and a second level filter. The storage controller configured to receive a first stage result. The memory configured to perform in-memory computing to the first stage result, to generate a second stage result. The first level filter configured to filter the second stage result to generate a third stage result. The second level filter configured to filter the third stage result to generate a fourth stage result. When a quantity of data results in the third stage result is larger than a predetermined threshold quantity, the memory system outputs the fourth stage result, and when the quantity of the data results in the third stage result is smaller than or equal to the predetermined threshold quantity, the memory system outputs the third stage result.

The present disclosure provides methods of three-stage nested amplification that facilitate multiplex amplification and multi-stage detection, in particular multiplex amplification assays that employ target-specific melting probes and / or high resolution melting (HRM) analysis using embedded dyes.

1. The name of the design product: throwing material impeller (three layers). 2. The use of the design product: cooperate with the feeding machine of fishery breeding, the feeding machine blows the feed into the impeller, and the impeller evenly throws the feed into the breeding water body through rotation. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view 1.

The application discloses a data management method and system suitable for IMR, wherein when a bottom track is updated, data of an effective top track is actively migrated to other free tracks; in the MFML data update strategy, a zigzag four-stage data management scheme is adopted, in the first stage, data of the bottom track is updated; in the second stage, the MFML strategy is adopted to update data of the bottom track; in the third stage and the fourth stage, data distribution and bottom track data update are continuously performed according to the mode of the second stage, and data management is realized. The application can make the MFML update strategy better play the performance in the four-stage data management scheme, and can also relieve the performance decline problem caused by the too high top track occupation amount of the multi-stage distribution scheme.

The invention discloses a hot rolling process method for large-wall-thickness acid-resistant pipeline steel X70MS with good low-temperature drop weight performance. The hot rolling process method is characterized in that the pipeline steel comprises the following chemical components in percentage by mass: 0.03%-0.04% of C, 0.2%-0.4% of Si, 1.0%-1.2% of Mn, 0.3%-0.5% of Cr, 0.3%-0.4% of Cu, 0.3%-0.5% of Ni, 0.10%-0.25% of Mo, 0.03%-0.04% of Nb, 0.01%-0.015% of Ti, 0.005%-0.008% of Ce, less than or equal to 0.004% of S, less than or equal to 0.008% of P and the balance of Fe and inevitable impurities. A continuous casting billet with the thickness of 360 mm or above is adopted for production, and the thickness of a finished product is 40-55 mm; a three-stage rolling process and a matched intermediate billet cooling and after-rolling ultra-fast cooling process are adopted, and the produced pipeline steel has good low-temperature plastic deformation performance and good hydrogen induced cracking resistance.

The invention belongs to the technical field of shield construction, and provides an assembly error control method for super-multi-block steel pipe pieces, which comprises the step of performing staged assembly on the whole group of steel pipe pieces forming a ring, namely first-stage assembly, second-stage assembly and third-stage assembly. When the checking error is larger than the error limit in the staged assembling process, the steel pipe pieces in the previous stage need to be assembled and adjusted again, it can be avoided that more time is wasted by full-ring reassembling, and the overall assembling efficiency is improved.

A kind of thick-wall acid-resistant pipeline steel X65MS hot rolling process method, the chemical composition of steel is as follows: C=0.03%~0.04%, Si=0.2%~0.4%, Mn=1.0%~1.2%, Cr=0.2%~0.4%, Cu=0.2%~0.3%, Ni=0.1%~0.4%, Mo=0.10%~0.25%, Nb=0.03%~0.04%, Ti=0.01%~0.015%, Ce=0.004%~0.006%, S≤0.004%, P≤0.008%, the balance is Fe and inevitable impurities;Production is carried out using continuous casting billet with thickness of 360mm and above, and the finished product thickness is 40~55mm;Three-stage rolling process and the matched intermediate billet cooling and post-rolling ultra-fast cooling process are used, the obtained pipeline steel has CLR≤10%, CSR≤1%, CTR≤1% in hydrogen-induced cracking (HIC) experiment under the condition of NACE solution immersion for 96 hours;In sulfide stress corrosion cracking (SSCC) experiment, no crack is found under the condition of four-point bending constant load nominal yield of 90% for 720 hours.

The invention discloses a large longitudinal slope simply supported steel truss girder high-position girder falling construction method, which relates to the technical field of bridge construction, and comprises the following steps: S1, arranging a girder falling supporting point position, manufacturing a girder falling support and supporting a steel truss girder; s2, synchronous jacking, local falling, section drawing and re-jacking are circularly and alternately conducted through a beam falling support at one end of the steel truss beam till first-stage beam falling is completed; s3, a jack arranged on a high pier end padstone of the steel truss girder is dismantled, girder falling continues, and second-stage girder falling is completed; s4, synchronous jacking, local falling, section drawing and re-jacking circulation are conducted through a beam falling support at the low pier end of the steel truss beam till third-stage beam falling is completed; s5, the jack arranged on the low pier end padstone of the steel truss girder is dismantled, girder falling continues, and fourth-stage girder falling is completed; s6, pressure grouting is conducted on the anchor bolt holes, other facilities are dismantled, and construction is completed; the technical problems that in the prior art, beam falling of a large-span steel truss girder bridge is difficult to control, and efficiency is low are solved.

This invention belongs to the field of metallic materials, and particularly relates to a steel plate for 820MPa cryogenic storage tanks and its manufacturing method. The chemical composition of the steel, by weight percentage, is: C: 0.18%–0.21%, Si: 0.15%–0.37%, Mn: 0.87%–0.96%, P≤0.01%, S≤0.005%, Ni: 0.41%–0.48%, Mo: 0.03%–0.08%, Nb: 0.12%–0.18%, Ce: 0.001%–0.0015%, with the balance being Fe and unavoidable inclusions. This invention, through a novel chemical composition design, employs a three-stage / two-stage efficient slab heating regime, an optimized three-stage rolling process, a two-stage cooling process, a high-temperature short-time tempering heat treatment, and a special manufacturing process, to obtain a high-strength, highly uniform, extra-thick steel plate for containers with excellent comprehensive performance.

The invention discloses a multi-stage cooling process for keeping the completeness of an alloy oxide skin, which adopts four-stage temperature control cooling and specifically comprises the following steps: in the first stage, cooling a sample from a heating temperature to 850-900 DEG C at a rate of 8-15 DEG C / min; in the second stage, heat preservation is conducted for 5-10 minutes in the temperature interval of 850-900 DEG C; in the third stage, the temperature is reduced to 240-260 DEG C from 850-900 DEG C at the speed of 3-5 DEG C / min; and a fourth stage: cooling from 240-260 DEG C to room temperature at a rate of 5-10 DEG C / min. By adopting the process disclosed by the invention, a complete oxide skin sample can be provided for researchers, and the process is used for accurately measuring the thickness of an oxide layer, analyzing component distribution and researching the characteristics of an interface transition layer, so that an alloy oxidation mechanism is deeply understood, and a theoretical basis and data support are provided for optimizing a production process and reducing oxide skin generation.

The invention discloses a manufacturing method of a pre-hardening-free high manganese steel frog, and relates to the technical field of turnout steel rail pieces. According to the method, the austenite high manganese steel frog is machined, so that the specific areas of a point rail and a corresponding wing rail are 50-80 mm higher than a working face, and the gradient of a transition slope is smaller than 60 degrees; and the heightened area is forged at the temperature of 1180-1200 DEG C through three-stage forging, the first-time forging rolling reduction and the second-time forging rolling reduction are controlled, heat preservation is conducted after forging, the heightened area is flush with the working face through third-time forging, finally, water cooling is conducted, and the pre-hardening-free high manganese steel frog is obtained. Pre-hardening treatment is not needed, the performance of the frog is improved through the structural design and the forging technology, a heterogeneous structure is formed on the surface layer, the initial strength of the frog is remarkably improved on the premise that plasticity and toughness of the frog are kept, the service life is prolonged, and the frog is suitable for severe service environments such as high-speed heavy haul railways and plateau railways.

This invention relates to the field of fish-scale pattern welding technology, specifically to a method for controlling fish-scale pattern welding. It includes multiple consecutive welding cycles, each with an arc-stabilizing phase. This arc-stabilizing phase comprises a first stage, a second stage, a third stage, and a fourth stage performed sequentially. This invention performs periodic welding control, incorporating an arc-stabilizing phase within each welding cycle. During this phase, the welding wire remains in the molten pool for a certain period to calm the pool. This ensures that the molten pool is intermittently calmed throughout the welding process, thereby maintaining optimal stability and improving the quality of the fish-scale pattern weld.

The invention discloses a three-phase coupled falling type dangerous rock surge amplitude prediction method which comprises the following steps: when a dangerous rock impacts a water body to form a cavitation bubble, the cavitation bubble is subjected to three stages of development, contraction and closing, and data of the thickness a of the dangerous rock, the length Lpot of the cavitation bubble and the water depth hw are acquired; the speed v0 and the initial potential energy Ec of the dangerous rock at the moment of making contact with the water surface and the initial kinetic energy Ek0 of the dangerous rock at the moment of impacting the water surface are calculated; iteratively solving the movement speed in all subsequent movement time, and establishing a speed-time relation curve after the dangerous rock enters water; according to the speed at any moment, the corresponding cavitation bubble diameter, the change rate and the change rule of the cavitation bubble potential energy along with time are obtained, and then the potential energy maximum value of the cavitation bubble above the closed point is obtained; the surge wave energy conversion rate is solved according to the maximum cavitation bubble potential energy value, and finally the maximum surge amplitude is solved. The method has the advantages that the energy conversion mechanism of the gas-phase substance in the wave making process is quantified by introducing the cavitation kinetic model, and the wave amplitude prediction precision is remarkably improved.

The invention provides a long-distance pipeline hydrostatic test innovation method and related equipment, and the method comprises the steps: carrying out the pressure test segmentation of a long-distance pipeline based on the related parameters of the long-distance pipeline, so as to obtain a first-stage pipe section; according to a water filling control condition, the pipe section of the stage is filled with water, so that a pipe section of a second stage is obtained; continuously injecting water into the pipe section in the second stage to increase the pressure of the pipe section in the second stage to thermodynamic equilibrium pressure to obtain a pipe section in a third stage; boosting the pipe section of the third stage to obtain a first detection result and a pipe section of a fourth stage; in response to the fact that the first detection result is qualified, the air existing amount in the pipe section is calculated, and a second detection result and the pipe section of the fifth stage are obtained; performing a sealing test on the pipe section in response to the fact that the second detection result is qualified so as to obtain a third detection result; and if the third detection result is qualified, determining that the quality of the long-distance pipeline is qualified. Through the method, the accuracy of quality detection of the long-distance pipeline can be improved.

This application provides a method and storage medium for improving the thickness qualification rate of cold-rolled strip steel products, relating to the field of steel rolling production technology. The method includes: after starting the rolling mill, increasing the initial rolling speed for this rolling operation; during the rolling process, when the thickness deviation of the strip steel is within the allowable deviation range, increasing the rolling speed in a first stage; when the rolling speed after the first stage of speed increase exceeds a first limit value, switching the control mode in the automatic thickness control system from feedback AGC to per-second flow control, and simultaneously increasing the rolling speed in a second stage; when the rolling speed after the second stage of speed increase exceeds a second limit value, increasing the rolling speed in a third stage, where the second limit value is greater than the first limit value; and automatically tailing the strip steel at the highest process rolling speed during the tailing stage. This method can reduce the number of meters of thickness deviation at the head and tail of the strip steel, reduce longitudinal thickness deviation, and lower production costs.

The application provides a three-stage direct-current transformer starting process current limiting method and system. The starting process is divided into three stages, and the method can be realized by using three analytical formulae. The starting process is divided into three stages, and a formula for calculating the duty cycle is used in each stage to determine the value of the output duty cycle at the current time, accurately limit the peak current, and has the characteristics of simple implementation, rapid adaptation to transformer parameter changes, and small calculation amount.

The application discloses a text adversarial attack method based on style transfer and whale optimization algorithm hybridization, and belongs to the field of text adversarial attack, and comprises the following steps: constructing a three-stage module and an improved style transfer module; generating a text adversarial sample through a semantic-based adversarial sample generation model, and inputting the text adversarial sample into the improved style transfer module and the three-stage module respectively for attack; and if the improved style transfer attack fails, entering the attack of the three-stage module. The application solves the problems of poor attack success rate, difficulty in searching for effective adversarial samples and easy deviation from semantics of existing single models; and the fusion model is used for attack in the field of text adversarial attack for the first time, so that the attack success rate is improved.

The invention discloses a 42CrMo deep nitriding process, and belongs to the technical field of metal material heat treatment. Firstly, slope heating is conducted on the gear ring, the heating speed is smaller than or equal to 60 DEG C / h, the time ranges from 8 h to 10 h, and the heating temperature ranges from 580 DEG C to 600 DEG C; in the first stage, the temperature ranges from 580 DEG C to 600 DEG C, the Kn value is not controlled, the ventilation capacity is 24 m / h, the CO2 ventilation capacity is 0.6 m / h, and the time ranges from 40 h to 50 h; in the second stage, the temperature is reduced to 500 DEG C, strong permeation treatment is conducted, the Kn value is 3-6, and the heat preservation time is 10 hours; in the third stage, the temperature is raised to 515 DEG C for diffusion treatment, the Kn value is 0.8-1.0, and the heat preservation time is 15 hours; in the third stage, the gear ring is subjected to rapid cooling treatment, ammonia gas replacement is adopted before the gear ring is cooled to 350 DEG C, nitrogen gas replacement is adopted below 350 DEG C, and the gear ring is cooled to 120 DEG C and discharged out of the furnace; by means of the method, the total time of the 42CrMo deep nitriding process can be effectively shortened, meanwhile, the nitriding surface hardness and the structure grade are guaranteed through strong nitriding and diffusion in the rear section of the process, and the surface hardness after nitriding can reach 630 HV1 or above.

The invention discloses a control method and device of a spiral conveyor, engineering machinery and a readable storage medium, and relates to the technical field of engineering machinery. The method comprises the steps that the real-time weight of materials conveyed by the spiral conveyor is obtained; according to the real-time weight, the real-time flow of the materials is determined; determining a first weight switching value according to the real-time flow and the target weight of the material; determining a second weight switching value according to the characteristics of the material and the metering precision requirement; and according to the first weight switching value and / or the second weight switching value and the residual weight of the materials, the working stage of the spiral conveyor is determined, and the working frequency of the spiral conveyor is controlled according to a control strategy corresponding to the working stage. According to the embodiment of the invention, the control method of the screw conveyor is divided into three stages, the parameter switching dynamic model based on the flow is constructed, and the weight switching value can be dynamically determined when switching is carried out in two adjacent stages, so that automatic control of the screw conveyor is realized, and the production efficiency is improved.

To provide a gaming machine that can effectively enhance the enjoyment of the game. [Solution] After the opening / closing execution mode triggered by a 5R low probability result ends, the system enters the first time-saving state. Furthermore, when the number of play rounds up to the ceiling is completed, the system enters the second time-saving state. Furthermore, when the play rounds corresponding to the time-saving result are executed, the system enters the third time-saving state. In the first to third time-saving states, it becomes easier for the ball to enter the second operation opening, and a shorter period is more likely to be selected as the display period for the variation of the play rounds. In this case, the first to third time-saving states are divided into the first, second, and third stages according to the number of play rounds executed, and the display period for the variation of the play rounds is selected in a manner appropriate to each stage. In addition, the information for each stage is set as sequential numerical information in the state determination counter of the main RAM 84, and by using this sequential numerical information as an offset value, a play round period table for determining the variation display period is selected.

The invention discloses a three-stage air flotation auxiliary demolding method and structure for an injection mold, and belongs to the technical field of injection molding. The invention aims to solve the problems of top white, top marks, buckling deformation and other defects caused by stress concentration and non-uniform demolding force due to traditional mechanical ejection during demolding of thin-wall and large-curved-surface parts. The method comprises the steps that S1, in the pressure maintaining and cooling stage, low-pressure gas is introduced through a porous gas permeation insert integrated with the ejector pin to form a gas floating layer so as to share stress; s2, at the moment of opening the mold, introducing pulse type medium-high pressure gas to integrally release the workpiece; and S3, the separated workpiece is ejected out in a stress-free mode through the ejector pin. Through a cooperative working mode of pre-separation, impact release and unstressed ejection, the demolding resistance is reduced from the source, uniform and instantaneous integral release is realized, demolding defects are eradicated, and the yield and the surface quality of precise workpieces are remarkably improved.

The application discloses a three-stage hybrid algorithm for solving a flexible job shop scheduling method, and solves a flexible job shop scheduling problem with the minimum maximum completion time as the target through a three-stage hybrid algorithm. In the search process, three stages are divided, and a population is divided into common individuals, elite individuals and alert individuals. In the first stage, a variable neighborhood breadth search algorithm is proposed to extensively search a solution space of process selection coding and update machine selection coding through a simplified Nopt1 neighborhood. When facing a small-scale scheduling problem, fast convergence to a global optimal effect can be realized. In the second stage, an adaptive elite individual number updating formula is proposed, and a crossover mutation operation is used to help the algorithm better exploit the elite individuals obtained in the previous stage. In the last stage, the alert individuals are updated to increase the ability of individuals in the population to escape from a local optimum. The method has the advantages of not being easily trapped in a local solution and high solution precision.

The invention relates to a refractory brick firing forming method and device, and relates to the technical field of refractory brick production, and the refractory brick firing forming method comprises the following steps of preliminary drying operation, adjustment operation and secondary drying operation. According to the innovative three-stage drying method, the sealing plate of the adjusting plate is used for blocking the ventilation groove of the supporting plate in the initial stage, stable plane supporting is provided for the wet green bricks, deformation is prevented, and the shape stability of the wet green bricks is ensured. After the green bricks are shaped, the adjusting plate is turned over to be switched to the breathable net plate to expose the breathable groove, and the drying parameters and the airflow direction are adjusted, so that the drying airflow can fully penetrate through the bottoms of the green bricks. According to the staged and variable-condition drying strategy, the industrial problem that the bottoms of the green bricks are not dried smoothly due to contact with the supporting faces is effectively solved, it is ensured that all parts (especially the bottoms) of the brick bodies are dried uniformly and consistently, and therefore the overall quality of final products is remarkably improved, and the defects of cracking, deformation and the like are reduced.

The invention discloses a production method for improving wear resistance of a pearlite steel rail. The specific production process comprises the following steps: (1) heating a steel billet; (2) rolling is conducted, specifically, the steel billet is rolled into a steel rail through a universal rolling mill, the initial rolling temperature is 1100 + / -30 DEG C, and the final rolling temperature is 925-940 DEG C; the cooling process of the steel rail is mainly divided into three stages; the pearlite rail steel comprises the following element components in percentage by mass: 0.78 to 0.80 percent of C, 0.61 to 0.71 percent of Si, 0.90 to 0.98 percent of Mn, 0.04 to 0.12 percent of V, less than or equal to 0.02 percent of P and less than or equal to 0.02 percent of S. And the balance of iron and inevitable impurities. Through the component optimization-gradient cooling-heat treatment process, on the premise that the toughness of a steel rail matrix is guaranteed, the hardness, wear resistance and contact fatigue resistance of a railhead key wear area are remarkably improved, and the service life of the steel rail is prolonged.

The invention relates to the technical field of blast furnaces, in particular to a process for reducing circulating enrichment of zinc in a blast furnace. According to the technical scheme, the process for reducing the circulating enrichment of zinc in the blast furnace comprises the following steps: (1) monitoring the charging raw material zinc load K (kg / t) of the blast furnace in real time; (2) when the zinc load K lasts for one week and is greater than 0.3 kg / t and less than 0.5 kg / t, executing a first stage: calculating the zinc load lifting amplitude h = (K-0.3) / 0.3; (3) if the temperature rise of T1 and T2 is less than 10 DEG C after the first stage is executed for 3 days, executing a second stage, and (4) executing a third stage when the current two stages are invalid: shortening the length of a tuyere small sleeve below an area with the temperature drop of more than 10 DEG C of a longitudinal cooling wall by L mm to meet the condition that L is equal to 0.5 * deltaT (deltaT is the temperature drop value), and returning to the first stage when the temperature rise of T1 or T2 is more than 30 DEG C. The long-term stable operation of the blast furnace under high zinc load is realized, and the fuel consumption and yield of the blast furnace are basically stabilized at normal levels.

The application discloses a two-section type removing method for a double-layer riser with a water depth of 100 meters, which is divided into three stages, namely, platform equipment layout, submersible underwater pipe cutting and riser cutting and ship crane lifting and moving the riser. The application adopts a method of cutting only one time to remove and lift the double-layer riser in a two-section type, so that the frequency of submersible underwater operation is greatly reduced, the ship time is saved, the ship standby caused by the on-site weather standby is avoided, the cost is reduced and the efficiency is increased, meanwhile, in the construction, the pipe sections with large depth difference are treated by adopting a single-point observation, multi-beacon correction and multi-point safe suspension and the like, and the upper and lower risers after being cut are respectively discarded by cooperation of the air submersible, the saturation and the ROV, so that the absolute safety of the construction personnel, the equipment and the platform is ensured.

The application discloses a manufacturing method of pre-hardening-free high manganese steel frog, and relates to the technical field of turnout rail pieces. The application processes the austenitic high manganese steel frog, so that the specific regions of the nose rail and the corresponding wing rail are higher than the working surface by 50-80 mm, and the transition slope gradient is less than 60 degrees. The above-mentioned high regions are forged by adopting three-stage forging at 1180-1200 DEG C, the reduction of the first and second forging is controlled, and the forging is kept warm. The third forging makes the high regions flush with the working surface, and finally, water cooling is performed to obtain the pre-hardening-free high manganese steel frog. The application does not need pre-hardening treatment, improves the frog performance through structural design and forging process, forms a heterogeneous structure on the surface, significantly improves the initial strength of the frog under the premise of maintaining the plasticity and toughness of the frog, prolongs the service life, and is suitable for harsh service environments such as high-speed heavy-load railways, plateau railways and the like.

The application provides a three-stage reinforcement design method, device and equipment for a building structure and a storage medium. It relates to the technical field of civil engineering structure reinforcement design. The method comprises the following steps: converting the toughness requirement of the building structure into a displacement requirement; converting the displacement requirement into a resistance requirement; and characteristic design of the reinforcement component. Traditional seismic design mainly emphasizes resistance, that is, the ability of the structure to resist damage, while ignoring the sustained working ability of the structure after deformation. The application focuses on toughness, and through design from the perspective of toughness, the building can exhibit better ductility in disasters such as earthquakes, which is consistent with the pursuit of post-earthquake recoverable function in the current building seismic field. The application realizes the conversion and transmission among the toughness index, displacement index and resistance index, and provides a reference for the reinforcement and reconstruction of old buildings and urban renewal.

The application provides a vein outside single chute inclined mining combined low waste and high efficiency mining method, and relates to the technical field of mining.The mining method is based on three stage stope construction, and the stoping work of each sublevel drift in each stage is realized by respectively constructing a first stope interlayer connecting tunnel, a second stope interlayer connecting tunnel and a third stope interlayer connecting tunnel, and the stope construction of the second stage and the third stage is cyclically carried out, so that the chute is directly connected with the stope through the stope interlayer connecting tunnel, without the construction of segmented vein outside drifts and panel slope ways, a large amount of mining preparation engineering quantity and construction time can be saved, and the technical problems that the mining preparation engineering quantity is large in the upward drift filling mining method, a large amount of segmented vein outside drifts and panel slope ways need to be constructed, and the technical problems that the ore block stoping preparation time is long, the ore block needs to be cut from the segmented vein outside drifts to the lower panel of the ore body after the construction of the segmented vein outside drifts is completed, and the drift is constructed to cut the ore block, and then the mining operation is carried out are effectively overcome.