4510 results about "Continuous casting" patented technology

The invention relates to the technical field of steel production plan optimization based on multi-dimensional constraint dynamic coupling, in particular to a molten iron operation plan arrangement method based on dynamic constraint modeling hybrid optimization, which comprises the following steps: acquiring order data, equipment state data and constraint rule data to generate structured input parameters comprising order priority labels; constructing a multi-objective optimization model based on the molten iron distribution constraint and the maintainable time length of the equipment, extracting the maintenance conflict relationship between the equipment groups, constructing a maintenance rule knowledge graph, and generating a dynamic constraint condition set; generating an initial molten iron distribution and maintenance plan through global search by adopting a genetic algorithm, and outputting a molten iron distribution path and an equipment maintenance time sequence through local optimization by combining a linear programming algorithm; according to the method, dynamic collaborative optimization of molten iron distribution and equipment maintenance is achieved, and the resource utilization rate, the order delivery rate and the production system stability are improved.

The invention provides a continuous casting quality control method based on a meta-cognitive coordination architecture agent cluster, and relates to the technical field of ferrous metallurgy intelligent manufacturing. The continuous casting quality control method comprises the steps of data input and standardization, center coordination and intelligent agent cluster operation and maintenance. In the central coordination process, the meta-cognitive coordination agent serves as a core to coordinate six kinds of functional agents including a semantic analysis agent, a data perception agent, a defect prediction agent, a root cause analysis agent, a process optimization agent and a digital twinborn agent, and task scheduling and state monitoring of the whole system are achieved. Three key functions of task decomposition, data scheduling and closed-loop management and control are completed; in the closed-loop management and control step, risk early warning, defect prediction, root cause analysis, process optimization and digital twinborn verification and feedback are carried out for continuous casting quality. Compared with a traditional scheme, optimization is carried out in the aspects of whole process, multiple modes, intelligence, collaboration and the like, the management efficiency is improved, and economic benefits can also be increased.

The invention discloses a method for manufacturing 7072 alloy high-performance air conditioner foil in a low-carbon, efficient and short-process mode, and relates to the technical field of aluminum foil machining. S2, continuous casting and rolling; s3, cold foil rolling; s4, finished product annealing; and S5, checking and packaging. Through component adjustment, iron and silicon alloy elements are controlled at the lower limit of the national standard, generation of coarse aluminum-iron-silicon phases is reduced, and low ductility caused by coarse grains after finished product annealing is avoided; in the cold foil rolling process, indexes of a working roll and rolling oil are adjusted, process parameters are optimized, the blank is directly rolled into a finished product, the direct rolling process is beneficial to improving the mechanical property of the finished product, and punching production of downstream customers is facilitated; and after triple continuous rolling is finished, subsequent cold foil rolling continuous rolling is rapidly arranged, deformation heat generated by triple continuous rolling and rolling of each pass is fully utilized, and large-machining-rate rolling of each pass is achieved.

The invention relates to the technical field of iron and steel smelting, in particular to a continuous casting quality data processing method based on multi-modal cognitive reasoning, which comprises the following steps of: synchronously acquiring multi-source sensor data, performing time alignment, format standardization, noise filtering and normalization processing, extracting image / thermal image spatial features through CNN (Convolutional Neural Network), and calculating the continuous casting quality data according to the image / thermal image spatial features. The LSTM is combined with frequency domain analysis to extract vibration / sound time sequence features, cross-modal alignment fusion is realized through feature vectorization, quality prediction, anomaly detection and real-time deployment are realized based on a deep neural network and an attention mechanism by fusing process knowledge, and then slab defect causes are accurately identified by integrating a multi-modal reasoning result. Through time synchronization, format unification, noise filtering and data filling, the problem of heterogeneity of multi-source sensor data is solved, and time dislocation and noise interference are eliminated; abnormal data are cleaned by an outlier removal technology, the reliability of input data and the model robustness are improved, and efficient cooperative processing of multi-modal data is ensured.

The invention discloses a 500MPa-grade supercritical CO2 corrosion-resistant pipeline coil plate and a manufacturing method thereof, and the 500MPa-grade supercritical CO2 corrosion-resistant pipeline coil plate comprises the following chemical components: 0.05 to 0.10 percent of C, 0.6 to 0.9 percent of Si, 1.50 to 1.70 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.002 percent of S, 0.10 to 0.30 percent of Cr, 0.35 to 0.45 percent of Mo, 0.03 to 0.05 percent of Nb, 0.01 to 0.03 percent of Ti, 0.02 to 0.05 percent of Al, 0.20 to 0.30 percent of Co, less than or equal to 0.008 percent of N, 1.2 to 4.3 percent of Mo / Cr, 0.75 to 0.92 percent of Mo + Cr + Co, 2.8 to 3.9 percent of Si / Co and the balance of Fe and inevitable elements. The manufacturing method comprises the steps of smelting, slab continuous casting, continuous casting slab heating, rolling, cooling and coiling. In the transverse direction of the rolled plate, Rt0.5 is larger than or equal to 540 MPa, Rm is larger than or equal to 640 MPa, Rt0.5 / Rm is smaller than or equal to 0.87, A50 mm is larger than or equal to 36%,-40 DEG C impact energy KV8 is larger than or equal to 220 J, and-20 DEG C drop weight DWTT is larger than or equal to 95%; in the longitudinal direction, Rt0.5 is larger than or equal to 520 MPa, Rm is larger than or equal to 630 MPa, Rt0.5 / Rm is smaller than or equal to 0.86, and A50mm is larger than or equal to 38%; the average corrosion rate in a 14.5 MPa supercritical CO2 environment is 1t; and 0.05 mm / a. The low-carbon medium-manganese molybdenum-chromium-cobalt-containing alloy design is adopted, the low-temperature toughness of a weld joint is guaranteed, the CO2 corrosion resistance and the oxidation resistance are improved, and higher safety is achieved in pipeline engineering.

The invention belongs to the technical field of non-oriented electrical steel manufacturing, and relates to a method for producing non-oriented silicon steel based on thin-strip cast rolling. The low-silicon and aluminum-free component design is adopted, the hot-rolled thin substrate is directly obtained through thin strip cast rolling, casting blank continuous casting and casting blank heating are omitted, the hot rolling reduction is greatly reduced, it is avoided that unfavorable textures of alpha and gamma components in the finished non-oriented silicon steel are remarkably improved, and the high magnetic induction of the finished product is guaranteed; after acid pickling and cold rolling, grain growth is promoted by means of high-temperature cover annealing, and low iron loss of a finished product is guaranteed; the high-magnetic-induction low-iron-loss non-oriented silicon steel with the thickness specification of 0.50 mm is obtained, the grain size of a finished product is 80-100 microns, the iron loss P1.5 / 50 is smaller than or equal to 4.0 W / kg, and the magnetic induction B5000 is larger than or equal to 1.76 T.

The invention relates to the technical field of aluminum foil processing, in particular to a method for producing high-stability 3102 alloy air-conditioning foil in a short process, which comprises the following steps of: smelting, continuously casting and continuously rolling an aluminum alloy raw material to obtain a strip, directly trimming the strip, rolling the strip on a cold rolling unit, preparing a cold-rolled coil with the thickness of 0.15-0.2 mm after three-pass rolling, rolling the cold-rolled coil by an aluminum foil rolling mill, and rolling the cold-rolled coil by an aluminum foil rolling mill to obtain the high-stability 3102 alloy air-conditioning foil. The tensile strength of the aluminum foil finished product is 135-139 Mpa, the ductility is larger than or equal to 19%, and the cupping is larger than or equal to 5.9 mm. The aluminum foil finished product is suitable in tensile strength, small in fluctuation range, higher in ductility and cupping value, capable of better meeting the use requirements of air conditioner foil, capable of guaranteeing the product quality and meanwhile capable of improving the product quality. According to the method, the production process is greatly shortened, the production cost is reduced, and the production efficiency is improved.

The invention belongs to the technical field of aluminum alloy materials, and particularly discloses a preparation method of a cast-rolled 8021 alloy aluminum foil, an 8021 alloy blank with the thickness of 6-8 mm is produced through cast rolling, the blank is subjected to direct homogenizing annealing under the condition of not cooling, is rolled through a cold rolling production process, and then is subjected to edge cutting, secondary intermediate annealing and foil rolling to be subjected to multi-pass rolling to obtain the finished product with the thickness. Compared with a traditional direct-cooling cast ingot hot rolling process, multiple links such as hot-rolled plate ingot casting, ingot blank sawing and face milling, uniform annealing and large-machining-amount hot roughing mill cogging rolling are omitted, energy is saved, consumption is reduced, carbon dioxide emission is reduced, the performance of a finished product is equal to or even superior to that of a hot-rolled product, and the use requirements of customers are met.

The invention discloses a slab surface crack prediction method based on PSO-MXGBoost and a prediction model construction method, and belongs to the technical field of surface defect prediction. According to the method, on the basis of a metallurgical mechanism embedded MXGBoost algorithm, a solidification shrinkage rate dynamic correction item is implanted into a traditional XGBoost loss function, the sample weight is adjusted according to a shrinkage rate coefficient calculated according to steel grade components, a theoretical reference value of crack tendency is quantified through a thermodynamic equation, and prediction output of XGBoost is restrained to conform to a continuous casting solidification heat transfer mechanism; meanwhile, key hyper-parameters of the MXGBoost model are optimized through a PSO algorithm, so that an optimal crack prediction model is obtained. According to the method, the prediction precision of the slab surface cracks can be effectively improved, meanwhile, the hyper-parameters of the MXGBoost model are automatically adjusted through the PSO algorithm, manual intervention can be reduced, the training efficiency and prediction accuracy of the model are improved, and therefore multi-target collaborative optimization of model precision and metallurgical feasibility can be achieved.

The high-steel-grade low-cost hot-rolled coil plate comprises the following chemical components: 0.040 to 0.065 percent of C, 0.20 to 0.35 percent of Si, 1.48 to 1.75 percent of Mn, less than or equal to 0.02 percent of P, less than or equal to 0.003 percent of S, 0.012 to 0.025 percent of Ti, 0.035 to 0.055 percent of Nb, 0.005 to 0.008 percent of RE, 0.15 to 0.20 percent of Cr, 0.0005 to 0.0020 percent of B, 0.002 to 0.004 percent of Mg, 0.025 to 0.050 percent of Als, less than or equal to 0.003 percent of Ca, less than or equal to 0.008 percent of N and the balance of Fe and inevitable impurities. The technological process comprises the steps of smelting, slab continuous casting, slab heating, rolling, cooling and coiling. Rt0.5 of the steel is 580-660 MPa, Rm is 650-750 MPa, A50 mm is larger than or equal to 28%, Rt0.5 / Rm is smaller than or equal to 0.90, the impact energy mean value Akv at the temperature of-40 DEG C is larger than or equal to 200 J, the drop weight DWTT mean value at the temperature of-20 DEG C is larger than or equal to 90%, the hardness value HV10 is smaller than or equal to 220, and the cold bending performance is qualified. The product provided by the invention has high strength and toughness and good welding performance, so that the product is more suitable for various complex and extreme service environments, and has higher safety in pipeline engineering.

The invention discloses a low-cost 450MPa-grade hot-rolled coil plate for a welded pipe and a manufacturing method thereof, and the low-cost 450MPa-grade hot-rolled coil plate comprises the following chemical components: 0.08 to 0.10 percent of C, 0.2 to 0.4 percent of Si, 1.4 to 1.6 percent of Mn, less than or equal to 0.02 percent of P, less than or equal to 0.003 percent of S, 0.01 to 0.03 percent of Ti, 0.020 to 0.040 percent of Nb, 0.003 to 0.005 percent of RE, 0.15 to 0.25 percent of Cr, 0.002 to 0.004 percent of Mg, 0.01 to 0.04 percent of Als, less than or equal to 0.003 percent of Ca, less than or equal to 0.008 percent of N, less than or equal to 0.15 percent of (Nb + Ti + C + N) and the balance of Fe and inevitable elements. The manufacturing method comprises the steps of smelting, slab continuous casting, casting blank heating, rolling, cooling and coiling. The Rt < 0.5 > of the steel is 450-550 MPa, the Rm is 550-650 MPa, the A50mm is larger than or equal to 30%, the ratio of the Rt < 0.5 > to the Rm is smaller than or equal to 0.90, and the impact energy average value Akv at the temperature of-30 DEG C is larger than or equal to 200 J.

A non-oriented silicon steel for a high-speed motor and a manufacturing method therefor. The chemical components of the non-oriented silicon steel for a high-speed motor are as defined in the description, wherein the thickness of a finished product is 0.20-0.30 mm, and the grain size of the finished product is 80-100 μm. The manufacturing method for the non-oriented silicon steel for a high-speed motor comprises: performing smelting and casting into a continuous casting billet, and performing cooling, heating, hot rolling, normalizing, pickling, cold rolling, annealing and coating treatment on the continuous casting billet.

The invention provides a continuous casting inclusion analysis and control method and device and a program product, and relates to the technical field of ferrous metallurgy intelligent manufacturing. The analysis and control method comprises the steps of multi-source data preprocessing and feature screening, including data acquisition, data cleaning, abnormal data enhancement, feature screening and weight calculation; performing association rule offline analysis, including modeling a time sliding window, performing data time sequence coding by adopting a bidirectional long-short-term memory network, and performing strong association rule mining and dynamic optimization based on a support degree-confidence joint optimization method and a rule dynamic updating mechanism; the online control and real-time optimization of the continuous casting production line comprises data acquisition, process calculation and quality judgment of an embedded DeepSeek lightweight inference engine, and further comprises real-time optimization control of a dynamic PID-DeepSeek hybrid control method. According to the method, a DeepSeek feature optimization engine is introduced, adaptive optimization of a parameter sensitive interval is realized based on a DeepSeek reinforcement learning framework, and the operation speed is increased through online-offline collaborative reasoning.

The invention belongs to the technical field of aluminum processing, and particularly discloses a method for producing a 1235 alloy cable aluminum foil by using a continuous casting and rolling blank, which comprises the following steps of: rolling the blank by a three-stand continuous rolling mill without cooling and surface milling, performing cold rolling, trimming and intermediate annealing, and performing multi-pass rolling by an aluminum foil rolling mill until the thickness of a finished product is reached, thereby obtaining the 1235 alloy cable aluminum foil. The processing flow is shortened, the metal manufacturing time is shortened, the energy consumption is reduced, after the aluminum foil finished product produced by the continuous casting and rolling blank is annealed, the mechanical property can be stably controlled within the tensile strength of 70-90 MPa, the performance of the finished product is more stable than that of a material produced by a cast rolling method, and the grain structure of the finished product is finer and more uniform than that of the material produced by the cast rolling method.

The invention belongs to the technical field of aluminum alloy production, and particularly discloses a low-carbon, low-cost and safe method for producing a 4343 alloy blank, raw materials are weighed according to a certain proportion, an aluminum melt obtained through smelting in a smelting furnace is refined and subjected to on-line degassing and filtering, the 4343 alloy blank is produced through a continuous casting and rolling method, a finished product is small in crack edge, segregation of internal components of the material is small, and the production cost is low. The method has the advantages that secondary aluminum can be used as raw materials in a large proportion, low carbon and consumption reduction are achieved, and the method is different from a traditional casting production mode, a matched casting deep well is not needed, the phenomenon that cooling water is accumulated in the deep well or a narrow area is avoided, and the explosion problem possibly occurring after high-temperature aluminum water makes contact with the cooling water is avoided; the production process is simple, the safety degree is high, aluminum-strontium alloy is not needed in the production process, the production cost is reduced, and meanwhile the strontium poisoning phenomenon caused by misoperation of field operators is completely eradicated.

The invention relates to the technical field of advanced high-strength steel for automobiles. The invention relates to cold-rolled dual-phase steel DP780 with low cost and high surface. The cold-rolled dual-phase steel DP780 comprises the following chemical components in percentage by mass: 0.10 to 0.15 percent of C, 0.20 to 0.40 percent of Si, 1.60 to 1.80 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.004 percent of S, 0.015 to 0.035 percent of Al, 0.010 to 0.025 percent of Ti, 0.005 to 0.015 percent of Nb, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of H and the balance of iron and inevitable trace impurities. The invention further provides a production method of the low-cost high-surface cold-rolled dual-phase steel DP780. The production method comprises the technological processes of smelting, continuous casting, casting blank reheating, rough rolling, finish rolling, cooling and coiling after rolling, hot coil acid continuous rolling and rolled hard coil continuous annealing. The 780MPa-grade cold-rolled dual-phase steel has the beneficial effects that the 780MPa-grade cold-rolled dual-phase steel which is small in alloy adding amount and easy to control steelmaking casting, hot rolling and continuous annealing can be stably obtained, and the use requirements of automobile parts are met.

The invention discloses a billet internal defect classification method, system and device based on PSO-SVM, and the method comprises the steps: S1, collecting billet internal ultrasonic signal data, and carrying out the preprocessing; s2, inputting the preprocessed data into a pre-trained defect classification model for identification; wherein the defect classification model comprises a particle swarm algorithm and a support vector machine; and S3, outputting a billet internal defect type identification result. The method is suitable for flaw detection of the continuous casting billet, is a more accurate internal flaw detection identification method, provides acceptable improvement measures for production of forgings, and is beneficial to quality control of the forgings.

The invention belongs to the technical field of aluminum alloy production, and particularly discloses a low-carbon environment-friendly method for producing a 3104 alloy blank with a high secondary aluminum proportion, which comprises the procedures of smelting, melt purification, online degassing filtration, continuous casting and triple continuous rolling, and is characterized in that alloy components are optimized, secondary aluminum waste is used in a large proportion, the Fe content is increased, and the production cost is reduced. Iron and elements such as manganese in the aluminum alloy form intermetallic compounds, the intermetallic compounds can serve as heterogeneous nucleation, obviously refine alloy grains during casting and increase Fe content, the performance of the 3104 alloy blank is improved, meanwhile, aluminum is replaced with iron, the main material cost can be reduced, in addition, due to the fact that the rolling temperature of an inlet of each rack is high, and meanwhile the finish rolling temperature is also high, the service life of the 3104 alloy blank is prolonged. The self-tempering effect is achieved, internal dislocation of materials is eliminated, the blank edge cracking condition is improved, strip breakage caused by the edge cracking problem in the subsequent rolling process is avoided, safe production is guaranteed, the main material cost is reduced, meanwhile, the blank performance is improved, the 3104 alloy blank is efficiently produced in a high-quality mode, and the purposes of low carbon and environment protection are achieved.

The invention relates to the technical field of advanced high-strength steel for automobiles. The invention relates to cold-rolled dual-phase steel DP980 with low cost and high surface. The cold-rolled dual-phase steel DP980 comprises the following chemical components in percentage by mass: 0.07 to 0.10 percent of C, 0.30 to 0.60 percent of Si, 2.00 to 2.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.003 percent of S, 0.015 to 0.035 percent of Al, 0.010 to 0.040 percent of Nb, 0.010 to 0.040 percent of Ti, 0.10 to 0.30 percent of Cr, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of H and the balance of iron and inevitable trace impurities. The invention provides a production method of low-cost high-surface cold-rolled dual-phase steel DP980. The production method comprises the technological processes of smelting, continuous casting, casting blank reheating, rough rolling, finish rolling, cooling and coiling after rolling, hot coil acid continuous rolling and rolled hard coil continuous annealing. The 980MPa-grade cold-rolled dual-phase steel has the beneficial effects that the 980MPa-grade cold-rolled dual-phase steel which is small in alloy adding amount and easy to control steelmaking casting, hot rolling and continuous annealing can be stably obtained, and the use requirements of automobile parts are met.

The invention discloses a production method of 900 MPa-grade high-strength sucker rod round steel based on rare earth microalloying, and belongs to the technical field of steel and iron material production. A proper amount of rare earth elements are added into the steel, and the purification, modification and alloying effects of the rare earth elements are utilized, so that the inclusion form and distribution of the steel are improved, grains are refined, and the strength, toughness and corrosion resistance of the steel are improved; meanwhile, by reasonably controlling production process parameters of smelting, continuous casting, rolling, heat treatment and the like, the structure uniformity and the mechanical property stability of the steel are ensured. Compared with a traditional production method, the 900 MPa-grade high-strength sucker rod round steel produced through the method has higher strength and better toughness and corrosion resistance, and the requirement of the oil exploitation industry for high-end sucker rod materials can be met.

The invention relates to the technical field of HB450-grade thick-specification wear-resistant steel plates, in particular to a flame cutting delayed crack-free HB450-grade thick-specification wear-resistant steel plate and a production method thereof. The steel is composed of the following chemical components in percentage by weight: 0.18%-0.22% of C, 1.00%-1.10% of Si, 0.8%-1.0% of Mn, 0.015%-0.03% of Nb, 0.6%-0.70% of Cr, 0.06%-0.09% of Al, 0.0005%-0.0020% of B, more than or equal to 1.4% and less than or equal to 1.6% of Mn and Cr, and the balance of Fe and inevitable impurities. The production process flow comprises the steps of smelting, refining, slab continuous casting, casting blank heating and slow cooling, slab heating, controlled rolling, stacking and slow cooling, quenching and tempering heat treatment, flame cutting with temperature and slow cooling with hot water. The surface hardness is larger than or equal to HB450, the thickness ranges from 40 mm to 80 mm, the tensile strength is larger than or equal to 1250 MPa, the retained austenite content is 5%-7%, delayed cracks do not exist after fire cutting, the trimming hardness is larger than or equal to HB410, AKV at the temperature of-40 DEG C is larger than or equal to 40 J, and A is larger than or equal to 12%.

The invention relates to the technical field of five-wheel continuous casting low-oxygen copper, in particular to a copper rod continuous casting process parameter optimization-based microstructure prediction method, which comprises the following steps of: formulating an adjusting factor set based on a comparison result of a crystallization line position of a copper casting blank and a standard crystallization line position; obtaining a microstructure image and inputting the microstructure image into the feature comparison model to obtain an anomaly set; inputting the production elements and the abnormal set into a parameter optimization model, and screening out a plurality of adjustment schemes; setting a reference factor to perform serialized adjustment on the adjustment scheme, and casting a copper casting blank according to the previous adjustment scheme; various passive data of the cast wheel are obtained, and a real-time matrix is obtained; the production elements and the real-time matrix are input into a microscopic image prediction model, and microstructure prediction is carried out; through construction of a feature comparison model and a parameter optimization model and application of a real-time matrix and a microscopic image prediction model, the automation level of the production process is improved, and a scientific basis is provided for standardization of process parameters.

The invention provides bainite non-quenched and tempered steel and a preparation method thereof.The preparation method comprises the following steps that blast furnace molten iron is sequentially subjected to molten iron pretreatment, converter smelting, ladle refining, vacuum refining, vacuum degassing, continuous casting and rolling, and the bainite non-quenched and tempered steel is obtained; the content of P at the smelting end point of the converter is less than or equal to And the content of S in the molten steel subjected to vacuum refining is 0.038%-0.045%. The bainite non-quenched and tempered steel with excellent comprehensive performance is obtained through reasonable smelting, refining, continuous casting and rolling process design of blast furnace molten iron designed by adopting specific chemical components, the preparation process is simple, and the preparation cost is low.

The invention discloses a manufacturing method of a high-efficiency and low-cost steel plate for a 345MPa-grade low-temperature pressure vessel, and belongs to the technical field of low-carbon microalloyed steel production. The manufacturing method comprises the steps of molten steel smelting, LF refining, RH vacuum degassing, continuous casting, casting blank heating, rolling, controlled cooling and straightening. The problems that steel plate rolling efficiency is low, rolling resistance is large, and the plate shape is not easy to control are solved, the steel plate is low in cost, high in strength and toughness and high in straightness, and the service safety of the steel plate for the low-temperature pressure container can be guaranteed.

The invention discloses a copper pipe blank horizontal continuous casting process optimization method based on machine learning assistance, and relates to the technical field of copper and copper alloy pipe blank horizontal continuous casting. The method comprises the steps of S1, data collection, S2, model construction, S3, hyper-parameter optimization, S4, model training and verification, S5, effect evaluation and S6, prediction and optimization of process parameters. A new particle swarm optimization algorithm is used for optimizing a neural network prediction model, the neural network prediction model is applied to the horizontal continuous casting process, the accuracy and the reliability are remarkably improved after the model is optimized, an online rapid calculation system, the particle swarm optimization algorithm and a multi-layer neural network model are combined, crystalline region parameters are accurately predicted and controlled, and the continuous casting quality is improved. Data obtained by an existing rapid calculation system has certain limitation, process parameters obtained based on a production field and crystallization position parameters under a corresponding mold are continuously added into a model training database, and prediction data are more accurate and closer to the current production situation.

The invention discloses a production process of rare earth microalloying low-cost 550MPa-grade weathering steel based on a CSP production line, and belongs to the technical field of steel and iron material preparation. According to the process, the composition proportion is optimized, La / Ce composite microalloying is adopted, and the CSP short-process continuous casting and rolling technology is combined, so that low-cost production of the high-performance weathering resistant steel is achieved. The method specifically comprises the key procedures of molten steel component design, whole-course protective pouring, homogenizing annealing at the temperature of 1100-1300 DEG C, six-rack controlled rolling, layered cooling and the like. The thickness of the obtained steel plate is 1-5 mm, the yield strength is larger than or equal to 550 MPa, the tensile strength is 620-780 MPa, the percentage elongation after fracture is larger than or equal to 16%, and the weight loss ratio is reduced by 15% or above compared with that of rare earth-free steel after the steel plate is immersed and corroded by 3.5% NaCl for 72 h. Through rare earth purification of molten steel, grain refinement and improvement of rust layer compactness, the corrosion resistance is remarkably improved while the use amount of Ni / Cu is reduced, the technical problem that nodulation is prone to occurring when rare earth is added in a CSP production line is solved, and the rare earth metal powder has the comprehensive advantages of being high in production efficiency, low in cost and stable in product performance and is suitable for weather-proof structural parts such as buildings and bridges.

The invention discloses a wear-resistant steel ball production process and surface treatment equipment thereof, and belongs to the technical field of wear-resistant balls, and the wear-resistant steel ball production process comprises the following steps: step 1, weighing raw materials, smelting the raw materials, and casting into a continuous casting billet; (2) the continuous casting billet obtained in the step (1) is placed in a steel rolling heating furnace to be heated to 1120-1250 DEG C, heat preservation and thorough burning are conducted, and then the continuous casting billet enters a continuous rolling unit to be rolled into a round steel bar; 3, the round steel bar is sent to a heating furnace to be heated to 1030 DEG C to 1100 DEG C, heat preservation is conducted, the round steel bar is taken out of the furnace after thorough burning, then the round steel bar is rolled into steel balls on a ball rolling machine, and the rolling temperature is 940 DEG C to 960 DEG C; 4, the steel balls with the waste heat enter a quenching water tank along a roller way to be subjected to water-cooling quenching, and the water entering temperature of the steel balls during quenching is 830-860 DEG C; and 5, tempering is conducted after quenching of the steel ball, the tempering temperature ranges from 160 DEG C to 200 DEG C, surface treatment is conducted after cooling, and finally the high-abrasion-resistance steel ball is obtained. The wear-resistant steel ball is high in production efficiency and high in quality; and the steel balls are uniform, high in core hardness, low in breakage rate and excellent in wear resistance.

The invention relates to a production method of a large-thickness high-toughness ultrahigh-strength F890 maritime work steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.10%-0.16% of C, 0.20%-0.30% of Si, 1.00%-1.40% of Mn, less than or equal to 0.005% of P, less than or equal to 0.0010% of S, more than or equal to 0.060% of Al, less than or equal to 0.005% of Nb, 0.03%-0.05% of V, less than or equal to 0.004% of Ti, less than or equal to 0.60% of Cr, 1.00%-1.50% of Ni, less than or equal to 0.30% of Cu, 0.20%-0.60% of Mo, 0.0010%-0.0020% of B, 0.0005%-0.0030% of Ca, less than or equal to The technological process comprises the steps of KR desulfurization pretreatment, converter treatment, LF refining, RH vacuum degassing, thick plate blank continuous casting, continuous casting blank covering and slow cooling, casting blank heating, rolling, steel plate offline covering and slow cooling, double quenching and tempering. The F890 ultrahigh-strength maritime work steel plate with the thickness smaller than or equal to 100 mm is finally obtained, and the mechanical property of the F890 ultrahigh-strength maritime work steel plate meets the requirements of the nine national classification society

The invention discloses a production method of a 15CrMoR steel plate for rare earth microalloying hydrogen-contacting equipment with excellent high-temperature performance. The production method comprises the steps of KR desulfurization, converter smelting, LF refining, RH refining, continuous casting, slow cooling in a heat preservation pit, heating, rolling, cooling, hot straightening, shearing, flaw detection, normalizing and tempering. The steel comprises the following chemical components in percentage by mass: 0.15-0.17% of C, 0.20-0.30% of S i, 0.50-0.60% of Mn, less than or equal to 0.012% of P, less than or equal to 0.005% of S, 0.019-0.029% of Al s, 0.9-1.1% of Cr, 0.50-0.60% of Mo, less than or equal to 0.0020% of Ce, less than or equal to 1.5 ppm of H, less than or equal to 0.0040% of O, less than or equal to 0.0060% of N and the balance of Fe. And the balance of iron impurities. A normalizing and tempering heat treatment process is adopted, and a low-carbon component design is adopted to ensure that the steel plate obtains excellent high-temperature performance and welding performance.

The invention discloses a preparation method of a precise seamless steel tube for a drill rod of a rotary drilling rig, and relates to the field of steel tubes. Comprising the following steps that raw materials are prepared and smelted, molten iron or high-purity waste steel with low phosphorus content, low sulfur content and low gas content is selected as a main raw material, and then the main raw material is subjected to external refining, component fine adjustment and continuous casting and blank treatment; hot piercing is carried out, specifically, the continuous casting round billet is loaded into an annular heating furnace, a multi-section heating system is adopted for heating, and then hot piercing treatment is carried out in a two-roller skew rolling piercing machine; hot rolling extension is conducted, specifically, the perforated tubular billet is rapidly fed into an online heating furnace, and then rolling is conducted on a multi-rack retained core rod or full-floating core rod continuous pipe rolling machine; and sizing / reducing, and rapidly heating. The steel pipe has rigidity, strength and humanity, the fatigue life of the steel pipe is prolonged, meanwhile, the surface smoothness of an inner hole is high, the dimensional tolerance of the inner diameter and the outer diameter is accurate, the wall thickness uniformity is high, the straightness is good, and in addition, the steel pipe also has high internal cleanliness and good wear resistance.