492 results about "Steel quality" patented technology

The invention discloses a steel fireproof door plate polishing device, which belongs to the technical field of fireproof door plate processing, and comprises a rack, rotating rollers uniformly and rotatably mounted along the length direction of the rack, and a housing mounted at one end of the top of the rack, conveying mechanisms are arranged at two ends in the housing, and second hydraulic cylinders are symmetrically and vertically mounted on two sides of the top in the housing. A reciprocating mechanism composed of a first shaft sleeve, a first spline shaft, a reciprocating lead screw, a second sliding block, a connecting rod and a first belt wheel assembly is arranged at the end of the grinding roller, in the process that the grinding motor is used for controlling the grinding roller to rotate, the grinding roller can be controlled to reciprocate in the axial direction, and axial movement and rotation are combined; a crossed net-shaped grinding track is formed, covering is more comprehensive, surface textures are more uniform, subsequent polishing procedures are reduced, spraying or assembling requirements are directly met, in addition, the grinding roller axially moves to enable dust to be distributed more dispersedly, the dust concentration of a working area is greatly reduced in cooperation with a negative pressure dust suction mechanism, and potential safety hazards are reduced.

The present application relates to the technical field of metallurgy, and particularly relates to a production method of a large-wall-thickness pipeline steel with improved carbon dioxide corrosion resistance and strength and toughness, and specific measures include: (1) controlling the bottom blowing mode and end point requirement in the converter process; (2) controlling the tapping time and replacing the tapping hole opportunity in the tapping process; (3) feeding the CAS aluminum wire and controlling the CAS argon blowing time; (4) controlling the top slag addition amount, heating time and outgoing mode in the LF refining process; (5) controlling the wire feeding parameters, soft blowing time and outgoing requirement of RH in the RH refining process; (6) controlling the precision requirement, casting speed fluctuation and crystallizer liquid level fluctuation of the continuous casting equipment in the continuous casting process to obtain the casting blank. Through controlling the parameters of each process in the smelting and rolling process, the present application realizes the whole-process steel cleanliness control and ladle grain refinement, and further improves the strength, low-temperature toughness, HIC resistance and carbon dioxide corrosion resistance of the large-wall-thickness pipeline steel.

The invention discloses a dynamic stray current interference corrosion risk assessment method for a buried steel pipeline, electronic equipment and a medium. The method comprises the following steps: collecting stray current interference field parameters; establishing a pipe-to-ground potential offset time proportion model, and calculating time proportions of different offset thresholds; determining a first risk level according to the time ratio of different offset thresholds; calculating an average alternating current density through a dynamic integration algorithm, and further determining a second risk level; and determining a final corrosion risk through a worst principle according to the first risk level and the second risk level. According to the method, a basis is provided for corrosion risk assessment and hazard identification of the buried steel pipeline under dynamic stray current interference, so that the operation safety of the pipeline is ensured.

The invention provides a steel surface defect detection and identification system and method based on a deep learning YOLOv8 model, and the system comprises an industrial camera which is disposed in a to-be-detected region of a steel production line and is provided with a high-brightness light source. The system is characterized by further comprising an image acquisition module, a fault detection module, a defect identification module and a man-machine interaction module which run on a computer and are connected with the industrial camera control system, and the method comprises the following steps: S1, system initialization, S2, image acquisition, S3, image preprocessing, S4, feature extraction and fusion, S5, defect identification and classification, and S6, result output and interaction. Automatic and precise steel surface defect detection and recognition of the whole process from image acquisition, defect detection to result output are achieved, manual visual judgment is not needed, detection standards are unified, the problem of unstable detection caused by manual experience differences is avoided, the labor intensity of operators is reduced, enterprise losses caused by defective steel circulation are avoided, and the production efficiency is improved. Reliable data support is provided for production process optimization, and the steel quality is guaranteed.

The invention relates to an automatic control method for electromagnetic stirring parameters of a slab continuous casting crystallizer, which comprises the following steps of: 1, selecting a proper water gap immersion depth according to the condition of a continuous casting production field, 2, networking to obtain technological parameters such as a casting blank section, a casting speed, the water gap immersion depth and an argon blowing flow, and 3, automatically controlling and calculating the electromagnetic stirring parameters. The method comprises the following steps: step 1, calculating the most preferential stirring parameter under the current working condition through table look-up and interpolation calculation, step 4, outputting an electromagnetic stirring current parameter, step 5, executing the output electromagnetic stirring parameter, step 6, tracking the quality of a continuous casting slab product, repeating the steps 1-6 at regular time, and repeating the steps 2-6 under the condition that the step 1 is not changed. According to the scheme, casting blank surface defects are effectively removed, and the product quality is improved. After the optimized method is adopted, the occurrence rate of longitudinal cracks on the surface of the steel grade is reduced to 1.96% from 4.73%, and the defect rate of the steel grade is reduced to 3.93% from 8.41%.

The invention provides constructional engineering reinforcing steel bar quality detection equipment, and relates to the technical field of reinforcing steel bar quality detection.The constructional engineering reinforcing steel bar quality detection equipment comprises a detection table, clamping assemblies are arranged at the two ends of the top of the detection table, each clamping assembly comprises a vertical plate, the vertical plates are fixed to the two ends of the top of the detection table, and shaft rods are rotationally installed on the inner side surfaces of the vertical plates through bearings; a driving motor is fixed to the outer end of a vertical plate on one side of the detection table, the output end of the driving motor is fixedly connected with the shaft rod, two limiting assemblies are symmetrically arranged on the surface of the middle of the detection table, each limiting assembly comprises a base, and the bases are fixed to the detection table. Two steel bars of the same specification can be fixed at the same time through the clamping assembly and the limiting assembly on the detection table and are used for bending resistance detection and tensile test respectively, independent tests of the two steel bars do not affect each other, the time for replacing the steel bars is saved, and the quality detection efficiency of the steel bars of the same specification is higher.

The utility model relates to the technical field of steel quality detection, in particular to a quality detection device for high-strength steel, which comprises a shell and an impact component. Through the cooperation of the screw rod and the rotating nut, the impact hammer head can be accurately controlled to move, so that the impact strength is adjusted, through the engagement of the upper end of the screw rod and the rotating nut, the impact hammer head can be controlled to move up and down through simple rotating action, and through the design of a ball and a handle arranged in the rotating nut, the impact strength is adjusted. According to the utility model, through the design of the magnetic attraction clamping seat and the chamfer of the striking hammer head, the transmission path of force is optimized, and the design of the chamfer of the striking hammer head and the magnetic attraction clamping seat is helpful for reducing the stress concentration in the striking process, and the high-strength steel detection device allows the detection of high-strength steel of different specifications and types, and improves the detection efficiency. The problem that the accuracy of evaluating the impact resistance and the fracture toughness of the material is poor due to insufficient detection strength is effectively solved.

The present application relates to steel structure erection technical field, concretely is a kind of steel beam jacking equipment for steel structure factory building assembly.It includes mainframe, adjusting assembly, adjusting track group;The adjusting assembly of the present application can effectively fix steel purlin and support it on roof, and the adjusting assembly of the present application can adjust the front and back positions of steel purlin, can rotate steel purlin by a certain angle to avoid interference with roof frame during jacking process, can also tilt purlin in a row by a certain angle to adapt to the angle of roof frame, under the support of adjusting assembly, workers only need to adjust purlin to installation position to start installation, and can install multiple purlin at a time, it is convenient and fast, greatly improve installation efficiency;The adjusting track group of the present application can use the support column of original building as reference to accurately position the whole system;The adjusting assembly of the present application can move front and back purlin along its length direction, make its head and tail connection without gap, to ensure its installation accuracy.

Disclosed in the present invention is a production and preparation method for a steel bar for a steam turbine impeller. The steel bar comprises the following chemical components in percentages by mass: C: 0.31-0.36%, Si: 0.22-0.35%, Mn: 0.45-0.60%, P: ≤0.013%, S: ≤0.008%, Cr: 1.05-1.20%, Ni: ≤0.20%, Cu: ≤0.10%, Mo: 0.21-0.28%, and V: 0.11-0.18%. The method comprises: converter smelting → LF refining → RH refining → continuous casting → a heating furnace heating process → a rolling process → a heat preservation process. The present invention satisfies the quality requirements of a steel bar for a steam turbine impeller, and indexes, such as mechanical properties, a high hardness and a high steel purity, can also satisfy high-standard requirements.

A method for producing and manufacturing steel for automobile engine connecting rods by means of an eco-friendly electric arc furnace process, comprising the following chemical components in percentage by mass: 0.38% -0.42% of C, 0.22% -0.35% of Si, 0.55% -0.70% of Mn, ≤0.015% of P, ≤0.008% of S, 0.65%-0.80% of Cr, 1.30%-1.55% of Ni, ≤0.15% of Cu, 0.16%-0.23% of Mo, and the balance iron and inevitable impurities. The process route comprises: ECOARC eco-friendly electric arc furnace+LF refining+RH refining+continuous casting billet+heating by heating furnace+rolling process+heat preservation, and produced steel bars for automobile engine connecting rods meet the mechanical property requirements and ensure the purity of steel.

The invention relates to a steel profile. The invention is characterized in that a small convex narrow surface is arranged on the base body or the boss. Contact area can be reduced, friction force is reduced, and mechanical efficiency is improved.

The application discloses a high-phosphorus molten iron extremely-low-sulfur and low-phosphorus hydrogen-doped pipeline steel steelmaking process control method, which reduces the burden of LF desulfurization through post-furnace slag system treatment, effectively improves the refining rate, improves the production efficiency and guarantees continuous casting through over-treatment or re-treatment of LF refining; compared with conventional production, the desulfurization efficiency is improved through converter slag system and LF refining slagging process, the cleanliness of the steel is also greatly improved, and the final total oxygen content can be stably controlled within 0.0015%. The application aims to provide a steelmaking process control method for realizing low-phosphorus and extremely-low-sulfur chemical composition in the process of smelting hydrogen-doped pipeline steel from high-phosphorus molten iron, especially for smelting low-phosphorus steel and extremely-low-sulfur steel from high-phosphorus molten iron, the cleanliness of the steel is also greatly improved, and the final total oxygen content can be stably controlled within 0.0015%.

The invention discloses a multi-objective optimization design method for a PBL shear connector based on machine learning, and the method is characterized in that the method comprises the following steps: collecting the shear bearing capacity of a plurality of PBL shear connectors containing input parameters and output parameters, and deducing test data; firstly, a Catboost machine learning model is trained by utilizing the deduced test data, then the trained Catboost machine learning model is adopted to predict the shear bearing capacity of the PBL shear connector, the sensitivity of input parameters is analyzed in combination with an SHAP method, and finally, a multi-target genetic algorithm is introduced into the verified Catboost machine learning model, so that the shear bearing capacity of the PBL shear connector is predicted. And a multi-objective optimization model with the minimum hole opening number and the minimum steel quality as objective functions is established, and PBL shear connector optimization design is conducted through the multi-objective optimization model. The lightweight and efficient construction of the PBL shear connector can be realized on the premise of meeting the shear bearing capacity.

The invention provides a buried steel pipeline magnetic stress quantitative detection system based on multi-physics field coupling inversion and PINN, and relates to the technical field of oil and gas pipeline structure health monitoring and integrity management. The invention discloses a buried steel pipeline magnetic stress quantitative detection system based on multi-physics field coupling inversion and a PINN. The system comprises a buried steel pipeline magnetic stress quantitative detection method based on the multi-physics field coupling inversion and the PINN. Accurate inversion from a non-contact MMM signal to continuous stress field distribution (MPa) is achieved. A lift-off height real-time measurement and compensation model is introduced, the problem of signal attenuation caused by buried depth change in buried steel pipeline detection is solved, and the detection precision and consistency are improved; according to the PINN architecture, a multi-physics field coupling model is deeply embedded into a learning process, and the problems that a pure data driving method is poor in generalization and physical interpretation are solved; according to the method, high integration of a detection result and a management system is realized, a mode of'rapid general survey + accurate review 'is realized, the detection efficiency is improved, and resource allocation is optimized.

The invention relates to a method for producing a wire converter square billet for producing an ultralow-resistance wire, which comprises the following steps of: smelting by adopting a 150t converter + LF + RH + 230mm * 1250mm * 3600mm continuous casting smelting process, and producing and manufacturing a converter process industrial pure iron slab; the produced industrial pure iron comprises the following chemical components in percentage by mass: less than or equal to 0.003% of C, less than or equal to 0.005% of Si, less than or equal to 0.030% of Mn, less than or equal to 0.005% of P, less than or equal to 0.005% of S, less than or equal to 0.005% of O, less than or equal to 0.02% of Cr, less than or equal to 0.02% of Ni, less than or equal to 0.02% of Cu, less than or equal to 0.020% of Al and less than or equal to 0.01% of Ti. According to the method, indexes such as chemical components and high steel purity of the converter process industrial pure iron plate blank are guaranteed, and the surface quality level of the converter plate blank industrial pure iron is also guaranteed.

A compression forming die for a powder metallurgy dumbbell comprises an upper die part, a middle die plate, a lower die part, an upper die stripping driving part, a lower die stripping driving part, a dumbbell head upper die core, a feeder, an operation table and a material receiving plate. Through the combination of an upper die part, a middle die plate, a lower die part, an upper die stripping driving part, a lower die stripping driving part, a dumbbell head upper die core, a feeder, an operation table and a material receiving plate which are of a specific structure, powder metallurgy powder is pressed at a time, and a powder metallurgy precision dumbbell product can be obtained. The defects of large boundary dimension precision error, rough surface, high energy consumption, heavy pollution, no energy conservation, environmental protection, long production period and high cost in the production of cast iron type steel dumbbell products can be overcome. Energy can be saved, consumption can be reduced, the production cycle can be shortened, the production cost can be reduced, the product quality can be improved, and the market competitiveness can be improved.

The invention relates to a production process of an alloy structural steel bar smelted by an ecological electric furnace. The alloy structural steel bar comprises the following chemical components: 0.39%-0.44% of C, 0.17%-0.37% of Si, 0.50%-0.80% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.90%-1.20% of Cr, less than or equal to 0.30% of Ni, 0.15%-0.25% of Mo, 0.02%-0.03% of Nb, 0.05%-0.10% of V, less than or equal to 0.20% of Cu and the balance of Fe and impurities. The production process route comprises ecological electric furnace smelting, LF refining, RH refining, continuous casting, heating, rolling, heat preservation and heat treatment. The smelting process flow of ecological electric furnace smelting, LF refining and RH refining is adopted, the high steel purity index is achieved, and the alloy structural steel bar has the excellent comprehensive mechanical property and meanwhile has the high surface quality level.

The invention discloses a full penetration joint composite liner for a closed small space and a welding method thereof. The composite material liner comprises a structural stress steel layer A, a composite ceramic layer B and an adhesive layer C for compounding the structural stress steel layer A and the composite ceramic layer B; the composite ceramic layer B faces the joint groove and can be provided with a groove / groove for controlling the shape of a molten pool and an air hole for exhausting gas and preventing a root air hole, and the side, away from the steel layer, of the composite ceramic layer B is provided with an acidic or alkaline welding powder layer G. The problems that a traditional metal gasket is prone to beading and incomplete penetration and a traditional ceramic gasket is prone to downwarping and difficult to assemble are solved, the welding seam forming is excellent, the mechanical property is good, and full penetration welding of closed small spaces such as a bridge steel anchor beam and a steel box beam support area is adapted.

The invention belongs to the field of steelmaking and continuous casting, relates to a method for improving the desulfurization rate of LF treated low silicon steel, and aims to solve the problems of low sulfur distribution coefficient and poor slag fluidity in the traditional LF desulfurization process during low silicon steel smelting. During converter tapping, table aluminum or high-aluminum iron is added for pre-deoxidation, and lime slag is added for washing desulfurization; before the molten steel enters the LF, argon blowing and oxygen determination are carried out at a CAS station, and an aluminum wire is fed to control the Als content; during LF treatment, lime is added to make high-alkalinity slag, and a ladle slagging agent is synchronously added to increase the flowability of top slag. According to the method, the KR desulfurization procedure is omitted, the technological process is simplified, the production cost is reduced, meanwhile, the desulfurization efficiency is improved, and the steel quality is guaranteed.

The invention discloses a production method of high-cleanliness ultra-low carbon series steel. The production method comprises the steps of deep desulfurization of KR molten iron, converter smelting, LF refining, RH furnace and continuous casting. In order to improve the control level of the inclusions in the steel, analysis is carried out by combining generation and removal of the inclusions in actual production processes such as a converter process, an RH refining process and a casting machine process, a removal process for reducing generation of the inclusions in the production process and optimizing the inclusions is formulated, and secondary oxidation in the casting process of a casting machine is prevented. And an ultra-low-carbon high-cleanliness converter end point control process, an RH refining ultra-low-carbon deoxidation process, an RH refining top slag modification process, casting machine castability research and casting blank quality control are researched. And high-cleanliness stable control over the low inclusions of the ultra-low-carbon high-cleanliness steel is achieved.

The invention discloses a design method and system for a steel sealing layer of a compressed air energy storage underground artificial reservoir based on an isogeometric phase field method, and the method comprises the steps: building a coupling model of air thermodynamics in the reservoir and heat conduction of a wall medium, and carrying out the simulation calculation of the changes of temperature and pressure in the reservoir in the process of inflation-gas storage-deflation-gas storage; establishing a phase field model for thermal coupling fatigue failure analysis of the steel sealing layer, the concrete lining and the surrounding rock; constructing an isogeometric four-order phase field method calculation model for the fatigue failure analysis of the block type steel sealing layer, and performing numerical simulation based on the influence of a block type layout mode, a welding mode, welding defects and welding residual stress of the steel sealing layer on the fatigue failure of the steel sealing layer; and carrying out statistical analysis on a numerical simulation result, and determining a layout method and a welding mode of the steel sealing layer. According to the method, a new thought is provided for design of the steel sealing layer of the compressed air energy storage underground artificial cave depot, and the method assists in solving the electricity abandoning problem of new energy through the CAES technology.

The invention relates to the technical field of special steel, in particular to a steel bar for a heavy-load automobile crankshaft and a production and preparation method of the steel bar, and the steel bar comprises the following chemical components in percentage by mass: 0.18-0.22% of C, 0.20-0.35% of Si, 0.60-0.90% of Mn, less than or equal to 0.012% of P, less than or equal to 0.005% of S, 0.40-0.60% of Cr, 0.20-0.30% of Mo, 0.15-0.20% of V, 0.01-0.02% of Nb, less than or equal to 0.15% of Cu, less than or equal to 0.25% of Ni and the balance of iron and inevitable impurities. The production and preparation method comprises the steps of converter smelting, LF refining, RH refining, continuous casting, casting blank annealing, heating, rolling process and heat treatment. According to the steel bar for the heavy-load automobile crankshaft, reasonable component design is adopted, and unique converter + LF + RH + continuous casting smelting process and rolling process are matched, so that the prepared steel bar for the heavy-load automobile crankshaft has the advantages that indexes such as mechanical property, impact property, high hardness and high steel purity of a finished steel product of the steel bar for the heavy-load automobile crankshaft are guaranteed; and the surface quality level of the steel bar for the heavy-load automobile crankshaft is guaranteed, and the requirement of a high-end product can be met.

The invention discloses a steel gas cylinder plate-type bottom collecting machine, and relates to the technical field of bottom collecting machines, the steel gas cylinder plate-type bottom collecting machine comprises a steel cylinder clamping machine, a waste box and a mounting shell, a steel cylinder main body is mounted in the steel cylinder clamping machine, a bottom collecting assembly and a scraper assembly are mounted on the side surface of the mounting shell, and the scraper assembly is correspondingly arranged below the bottom collecting assembly; the bottom collecting assembly comprises a servo motor fixedly mounted on the side face of the mounting shell, a first rotating column is rotationally connected to the interior of the mounting shell, a first rotating rod is fixedly connected to the side face of the first rotating column and extends to the side face of the mounting shell, and a bottom collecting mold is fixedly connected to the end of the first rotating rod and is made of 45 steel; according to the steel gas cylinder plate-type bottom closing machine, the bottom closing mold adopts the inlaid composite ceramic modules, so that the bottom closing machine can be used on two sides and is easy to replace, the service life is remarkably prolonged, the replacement frequency is reduced compared with that of traditional surfacing welding, and the steel gas cylinder plate-type bottom closing machine has the properties of shock resistance, crack resistance, high temperature resistance and wear resistance.

The utility model discloses a kind of steel pipeline weld spray walking mechanism, in along the inner wall or outer wall of steel pipe walking process, the position of weld is detected by the distance sensor that is located above steel pipe weld and continuously does reciprocating movement, and whether weld is located in the middle position of pre-set moving range is distinguished, then weld position information is passed to PLC, differential is generated by PLC control walking wheel, and then walking track is adjusted, guarantee the center line of walking track and the center line of steel pipe weld coincide, the walking mechanism of this steel pipeline weld spray can be realized in the automatic spraying process of anticorrosive coating to steel pipe weld, walking route is always located in the center position of weld, so that anticorrosive coating is accurately sprayed on weld, improve work efficiency.

The invention belongs to the technical field of industrial automation and intelligent manufacturing, and particularly discloses a steel analysis laboratory intelligent monitoring management system based on multi-source data fusion, which comprises a parameter monitoring module, a process judgment module, a path decision module, a deviation analysis module, a deviation propagation judgment module and a health assessment module. According to the method, the equipment operation state parameters and the material quality parameters of the steel sample in each process are collected in real time, and the preset steel quality detection standard is combined to judge whether the current process is qualified or not, so that the problem that equipment monitoring and quality detection are mutually disjointed is solved; meanwhile, the state deviation degree of the previous procedure and the real-time monitoring parameters of the subsequent procedure are subjected to fusion analysis, cross-procedure quality influence evaluation is established, then the propagation path of the quality deviation between the procedures is dynamically tracked, the process set value of the subsequent procedure is accurately adjusted based on the deviation of the previous procedure, and the quality of the subsequent procedure is improved. And beforehand intervention on the quality risk is realized.

The invention relates to a method for producing casings, in particular artillery gun and / or grenade casings, from a steel material. Also disclosed is a system for producing such casings, or a system configured to carry out the method according to the invention. The method and the system enable the efficient production of casings with a significantly shortened cycle time.

The invention provides a dual-phase steel crack detection method and system, and relates to the technical field of crack detection.The method comprises the steps that a detection platform is built for dual-phase steel crack detection; traversing and scanning the dual-phase steel through the detection platform to obtain a steel initial data set, and performing wavelet packet noise reduction processing on the steel initial data set to obtain a steel optimized data set; acquiring a steel imaging picture according to the steel optimization data set; processing the steel imaging picture by using an image processing algorithm, and constructing a steel crack information set; establishing a scoring system in combination with the steel crack information set, and constructing a steel quality evaluation model; and obtaining the quality evaluation grade of the inspection steel, and generating a dual-phase steel quality evaluation report. The technical problems that in the prior art, internal cracks cannot be clearly detected, the operation process is tedious, the detection speed is low, the detection accuracy is poor, and integrated evaluation and analysis cannot be achieved are solved.

The invention belongs to the field of building materials, and particularly relates to a modified counterweight steel aggregate and a preparation method and application thereof.The modified counterweight steel aggregate comprises a steel shot serving as a core medium and a modified layer arranged outside the steel shot, the modified layer is prepared by rolling and coating the outer side of the steel shot with a powder material, and the thickness of the modified layer is 1-2 mm. According to the invention, the surface roughness of the aggregate is increased by bonding the powder particles with different sizes on the surfaces of the steel shots, so that the compatibility and bonding effect of the counterweight steel aggregate and a concrete interface can be effectively improved, the adhesion of a gel product is facilitated, and the blocking force of aggregate sinking is increased; the sinking problem of the steel aggregate in newly poured concrete is effectively inhibited, the workability of a concrete mixture is improved, and the segregation risk is reduced. The characteristics that the surfaces of the steel shots are smooth and do not absorb water are improved, and the situation that due to the existence of the steel shots in a system, more water is used for hydration or serves as free water, an interface transition area is fragile, and the strength of prepared concrete is reduced is avoided.

The utility model relates to the technical field of collection of residual materials on the barrel wall of a material barrel and the roller surface of a three-roller grinding machine after conductive silver paste is prepared, and discloses a conductive silver paste residual material collection tool which comprises a handheld outer shell, a square rubber block and a U-shaped rubber block. The square rubber block is detachably installed and fixed to the inner side of the handheld outer shell, and a U-shaped rubber block is detachably installed on one end face of the square rubber block. Compared with the prior art, the hand-held handle has the advantages that the hardness of the hand-held end is increased by the steel inside the hand-held outer shell, and the hand-held section is endowed with good use hand feeling while the hardness is increased by the externally-wrapped silica gel. The square rubber block is convenient to replace through a screw and nut mounting mode, the scraping end of the square rubber block adopts a harder rubber scraping head with certain toughness, edges with 90-degree right angles on the two surfaces of the top end are reserved, residual materials can be easily collected in a 45-degree inclination mode in the material collecting process, and the material collecting efficiency is greatly improved. And the residual materials on the roller surface of the three-roller machine can be cleaned more safely.

This application discloses a method, apparatus, and medium for joint prediction of multiple steel quality indicators under small sample conditions, relating to the field of material performance prediction. The method includes: determining a standardized dataset comprising steel chemical composition, process parameter characteristics, and multi-dimensional mechanical performance indicators; configuring the target order of the multi-dimensional mechanical performance indicators; constructing a regression chain model based on the target order, wherein the predicted values ​​of preceding mechanical performance indicators serve as additional input features for the regressors corresponding to subsequent mechanical performance indicators; employing a nested cross-validation strategy to search and optimize the hyperparameters of the regression chain model to determine the target hyperparameter combination; performing full retraining of the regression chain model based on the target hyperparameter combination to obtain a trained joint prediction model for steel performance; and inputting the chemical composition and production process parameters of the steel to be predicted into the joint prediction model to obtain the joint prediction results for each steel performance indicator corresponding to the steel to be predicted.