466 results about "Rolling speed" patented technology

The invention provides a low-cost TA4 titanium alloy strip preparation process which comprises the following steps: step 1, preparing a TA4 slab ingot by adopting an electron beam cold hearth smelting furnace die casting method, and carrying out integral machining on the upper surface and the lower surface of a cast ingot by using a large integral cutter head milling machine to obtain a slab; 2, rolling the plate blank to obtain a hot-rolled coil; thirdly, the hot coil is rolled to 3.0-3.8 mm, annealing is conducted, and oxide skin removing treatment is conducted; step 4, trimming two sides, rolling to 1.8-2.5 mm, and carrying out heat treatment; step 5, trimming two sides, rolling to 0.7-1.2 mm, and carrying out heat treatment; sixthly, finished product rolling is conducted after the two sides are trimmed, the rolling process deformation is 20-30%, the rolling target thickness is 0.4-0.5 mm, the pass deformation is smaller than or equal to 7%, the tension is 25-75 kg / mm < 2 >, and the rolling speed is 30-60 m / min; step 7, heat treatment; and 8, stretch bending and straightening. By controlling the rolling process deformation, the rolling target thickness, the pass deformation, the tension and the rolling speed, the rolling deformation nonuniformity is weakened, the plate shape is improved and optimized, rib forming is avoided, and finally stable production of the TA4 titanium alloy strip is achieved.

The invention belongs to the technical field of steel production, and relates to a method for improving the accuracy of final rolling temperature prediction based on a deep learning algorithm. According to the method, multiple key data, such as finish rolling inlet temperature, rolling force, cooling water flow and rolling speed, influencing the finish rolling temperature of hot rolled strip steel are selected through correlation analysis, and a generalized regression neural network (COA-GRNN) optimized by a raccoon optimization algorithm is utilized to establish a finish rolling temperature prediction model. The model realizes remote monitoring of the finish rolling temperature, so that production personnel can predict the trend of the finish rolling temperature in advance and adjust the finish rolling temperature in time, thereby ensuring the quality stability of strip steel and the yield of production.

The invention discloses a cold-rolled strip steel rolling control method and related equipment, and relates to the technical field of strip steel rolling, and the method comprises the steps that a first deviation rectification value and a second deviation rectification value in the strip steel running process are obtained in real time; based on the first deviation correction value, the rolling speed of the rolling mill is adjusted to a preset speed; after the rolling speed is adjusted, the tension parameter and the roller inclination parameter of the target rack are dynamically adjusted based on the second deviation correction value; and the tension parameter and the roller inclination parameter are recovered to initial set values so as to maintain the continuous stability of the rolling process. According to the method, the deviation correction values in front of the pickling section outlet and the rolling mill inlet are obtained in real time, the rolling speed and the shearing speed are dynamically adjusted before the strip steel enters the rolling mill, the tension parameters of the rack and the inclination direction of the rollers are accurately adjusted in combination with feedback of the second deviation correction value, and the deviation trend caused by camber defects is effectively restrained; and the rolling continuity and stability are improved.

The invention discloses a rolled piece temperature control system based on a steel rolling process, which relates to the technical field of steel rolling and comprises a detection module, a control module, an execution module and a cooling module, the detection module comprises infrared thermometer arrays, an ultrasonic thickness gauge, an electromagnetic flowmeter, a pressure transmitter and a thermal resistance thermometer, and the infrared thermometer arrays are used for being arranged in front of and behind a cooling section and respectively collecting initial temperatures before entering a cooling system. Through the self-adaptive PID algorithm, the finite difference heat conduction model and the Smith pre-estimation compensation strategy are combined, the problem of control delay caused by the large lag characteristic in the cooling process is solved, control parameters can be dynamically adjusted according to the rolling speed, the steel grade characteristic and the like, temperature adjustment better fits the actual working condition, and the control precision is improved. The phenomenon of supercooling or insufficient cooling in a traditional control mode is fundamentally avoided, and the uniformity and stability of the performance of rolled pieces are guaranteed.

The invention provides a production method of a steel wire rod and a welding wire, and the production method of the steel wire rod comprises the following working procedures sequentially performed on a square billet: a heating working procedure: the square billet sequentially passes through a preheating section, a heating section and a soaking section, the temperature of the preheating section is controlled to be 820-870 DEG C, the temperature of the heating section is controlled to be 950-1000 DEG C, the temperature of the soaking section is controlled to be 1000-1040 DEG C, and the total heating time is 70-90 minutes; in the rolling procedure, rough rolling, intermediate rolling and finish rolling are conducted on the heated square billet to obtain a wire rod, the finish rolling inlet temperature is controlled to be smaller than or equal to 850 DEG C, the rolling speed is controlled to be 100-110 m / s, and the spinning temperature is controlled to be 780-810 DEG C; and a cooling process: after spinning, controlling the cooling speed to be less than or equal to 0.6 DEG C / s, and cooling the wire rod to 500-550 DEG C. According to the production method of the steel wire rod, the steel wire rod has a small-size structure, drawing is facilitated, the mechanical property of the same circle is uniform, the thickness of the oxide layer is uniform, and shelling is facilitated.

The invention belongs to the technical field of cobalt-based alloy machining, and particularly relates to high-strength cobalt-based alloy rolling machining equipment which comprises a rack and a cooling system, an upper roller and a lower roller are installed on the rack, one end of the rack is fixedly connected with a first motor, and the first motor is connected with the end of the lower roller through a reduction gearbox; and the other end of the lower roller is mounted on the bearing seat. The device further comprises a thickness acquisition module and a stress acquisition module. The thickness acquisition module and the stress acquisition module are used for monitoring the thickness and rolling pressure fluctuation of a rolled plate in real time, the control module is used for generating a corresponding fluctuation coefficient, and the thickness fluctuation coefficient and the stress fluctuation coefficient are comprehensively analyzed to generate an evaluation coefficient; and the roller spacing, the rolling speed and the working state of a cooling system are dynamically adjusted according to the evaluation result, so that the rolling process can adapt to material characteristics and working condition changes, the thickness uniformity of rolled plates is effectively improved, and the adverse effect caused by abnormal fluctuation of rolling pressure is reduced.

The present invention relates to the technical field of vehicle road noise simulation. Disclosed is a linearized tire model building method. The method comprises: building a two-dimensional tire finite element model on the basis of a material distribution diagram, gridding parts of a tire, and defining different material parameters; performing inflation, loading and rolling simulation; performing modal simulation; and then using special software to generate a linearized tire model. During finite element model building, a cavity characteristic is added for the linearized tire model, and during simulation, tire cavity air property parameters are given; in order to consider the damping characteristic of the tire, a rubber component in the finite element model is represented by a hyperelastic Yeoh model and a viscoelastic model represented by a Prony series, and a cord is described by a linear elastic constitutive model; and the finite element model is a model with a speed, and simulation at any rolling speed can be performed, so that the linearized tire model comprises a speed characteristic, making linearized tire model building more accurate.

The utility model discloses a special-shaped lithium strip rolling and shaping device which is sequentially provided with a lithium strip placing mechanism and a special-shaped rolling mechanism along a processing path, the lithium strip placing mechanism is used for placing a lithium ingot; the special-shaped rolling mechanism comprises a first special-shaped roller and a second special-shaped roller which can move towards each other and away from each other, the outer surface of one of the first special-shaped roller and the second special-shaped roller is provided with a circumferentially-arranged convex strip, the outer surface of the other one of the first special-shaped roller and the second special-shaped roller is provided with a circumferentially-arranged groove, and the convex strip and the groove are oppositely arranged. The convex strips are matched with the grooves to press indentations on the lithium strip; after the scheme is adopted, the problem of poor production quality of the existing rolling and shaping device can be solved, the rigidity of a lithium strip can be improved, the tension control of unwinding of the rolled lithium strip can be better controlled, the flowability of lithium can be reduced, the problem of material stacking in the rolling process can be better solved through indentations, the rolling speed can be increased, and the production efficiency and the qualified rate can be improved.

The invention belongs to the field of non-ferrous metal cast rolling production equipment, and relates to a front cooling high-speed cast rolling machine and a production method thereof. The pair of casting and rolling rollers is mounted in the casting and rolling archway; the casting and rolling transmission system is used for driving the casting and rolling rollers to rotate; the rotary cooling system is used for cooling the casting roller; the belt type pre-cooling device is mounted on the cast-rolling archway and is positioned at the upstream of the cast-rolling roller, and the belt type pre-cooling device comprises an upper cooling steel belt and a lower cooling steel belt which are arranged to form a cooling channel for receiving and cooling the casting molten aluminum; the belt type pre-cooling transmission device is used for driving the upper cooling steel belt and the lower cooling steel belt to move; the controlled cooling spraying system is used for cooling the upper cooling steel strip and the lower cooling steel strip; and the belt type pre-cooling device is configured to pre-cool the casting molten aluminum before the casting molten aluminum enters the casting roller, so that the liquid-solid phase ratio of the casting molten aluminum is reduced, and the purposes of shortening the cooling and solidification time, improving the casting and rolling speed and increasing the productivity are achieved.

According to the high-quality high-speed wire rolling method for the low-alloy high-speed steel wire rod based on continuous casting forming, gradient heating is conducted through the step type heating furnace, preheating of a continuous casting blank is uniform, and phase change stress is reduced. The initial rolling temperature is set and controlled to be 1060-1100 DEG C, the finish rolling temperature is controlled to be 950-1050 DEG C, the spinning temperature is controlled to be 980-1030 DEG C, and the highest rolling speed is 25 m / s. And after rough rolling, induction heating temperature compensation is carried out to increase the surface temperature of the blank, the temperature is set to be 1000-1040 DEG C, the temperature compensation time is controlled to be 10-20 s, and surface cracks and head wind caused by too low temperature are prevented. And closing the cover plate after spinning, adopting heat collection, immediately entering a slow cooling tunnel furnace for furnace cooling after doffing, and discharging for annealing after 48 hours or longer. A continuous casting technology is used for replacing a traditional die casting technology, controlled rolling and controlled cooling in the rolling process are matched, composition segregation is remarkably reduced, the core quality is improved, carbides are effectively refined, the uniformity of products is guaranteed, the production efficiency is improved, the production cost is reduced, and the influence on the environment is reduced; and a new process and a new route are provided for producing the high-quality low-alloy high-speed steel wire rod.

The invention discloses a cold rolling speed-rolling force-tension cooperative control system and method for a composite board, and the method comprises the steps: firstly, achieving the multi-step dynamic prediction of rolling key parameters through the time sequence feature extraction capability of a GRU network based on the cold rolling data of a multi-layer composite board, and achieving the feed-forward control through online optimization; a fuzzy PID self-adaptive compensation strategy is combined, so that the influence of external disturbance and parameter time variation is effectively inhibited; and the two methods are combined in a weighted fusion manner, so that the perspectiveness is ensured, the real-time disturbance influence is considered, and the cold rolling speed-rolling force-tension cooperative control of the composite plate is realized. According to the cold rolling speed-rolling force-tension cooperative control system and method for the composite board, the control effect is better, higher generalization ability and anti-interference performance are achieved, the control precision and stability of cold rolling of the multi-layer composite board are greatly improved, and the system and method can be widely applied to the cold rolling production process of the multi-layer composite board.

The invention relates to the technical field of rolling optimization, in particular to a ring-pull can aluminum foil rolling process parameter optimization method which comprises the following steps: ring-pull can aluminum foil rolling optimization: setting rolling speed and pressure to ensure uniform thickness and smooth surface; parameters are adjusted through multiple rounds of rolling, and a joint optimization cycle is established; microwave and electromagnetic heating are introduced, rolling and heating are iteratively optimized cooperatively, an optimal parameter combination is obtained, and the problems that due to the fact that the control precision of key parameters such as temperature and pressure is limited, non-uniform distribution of the thickness of aluminum foil and reduction of the surface quality in the ring-pull can production process are directly caused are solved. According to the technical scheme, the technical problems that in the prior art, the rolling process parameters of the aluminum foil of the zip-top can are controlled in a refined mode due to collaborative iteration optimization rolling and multi-stage heating, the thickness uniformity and the surface smoothness of the aluminum foil of the zip-top can are remarkably improved, and support is provided for comprehensively improving the quality of the zip-top can product are solved.

The invention relates to a production method of thin cold-rolled strip steel for food cans, which comprises the following steps of: smelting molten steel according to preset smelting components, and continuously casting after smelting; the casting blank subjected to continuous casting enters a hot rolling procedure, the final rolling temperature of the casting blank corresponds to the carbon content, and finally hot-rolled strip steel with the thickness of 2.0-2.3 mm is obtained; hot-rolled strip steel enters a rolling procedure after being subjected to acid rolling uncoiling, a five-rack rolling mode is adopted for acid rolling, and the total reduction rate is controlled to be 91%; coiling and then entering a continuous annealing process; in the annealing furnace, the annealing temperature and the strip steel speed are in a proportional relation, and finally finished strip steel is obtained. The thin-gauge strip steel can be produced at a high cold rolling speed, meanwhile, vibration of the rolling mill is effectively relieved, the production cost is reduced, and the product quality is not affected.

The invention discloses a rolling force prediction method based on a deformation resistance and rolling force coupling model of a tandem cold mill, which comprises the following steps of: establishing a deformation resistance model of the tandem cold mill for realizing prediction of rolling speed on deformation resistance; a total rolling force model of the cold continuous rolling mill is established and used for predicting the total rolling force in the cold continuous rolling process; establishing a deformation resistance and rolling force coupling model parameter data set; the deformation resistance model of the cold tandem mill is coupled with the total rolling force model of the cold tandem mill, and a deformation resistance rolling force coupling model based on the length of the deformation area is obtained; based on a training set in the parameter data set of the deformation resistance rolling force coupling model, parameter optimization is conducted on the deformation resistance rolling force coupling model based on a differential evolution algorithm, training of the deformation resistance rolling force coupling model is achieved, and the trained deformation resistance rolling force coupling model is obtained; and inputting the test set into the trained deformation resistance and rolling force coupling model to predict the rolling force of the cold tandem mill.

The embodiment of the invention discloses a rolling method for effectively relieving anisotropic titanium alloy TC4 thin strip coils and the titanium alloy TC4 thin strip coils, and relates to the technical field of alloy rolling. Comprising the steps that a leading tape is welded to the TC4 titanium alloy coiled material, the TC4 titanium alloy coiled material is placed on an uncoiling machine, and tension is formed on the TC4 titanium alloy coiled material through a tension roller; warm rolling is conducted on the TC4 titanium alloy coiled material at the temperature of 650-750 DEG C, the rolling speed is 500-800 mm / s, the single-pass reduction rate is 10-20%, reciprocating rolling is conducted under the condition that the asynchronous ratio of an upper roller to a lower roller is 1-1.3, and heat preservation is conducted on the TC4 titanium alloy coiled material after each pass of rolling is completed in a furnace for 10-25 min; and the TC4 titanium alloy coiled material rolled to the required thickness is subjected to annealing treatment under the argon protection condition, the annealing treatment temperature ranges from 850 DEG C to 950 DEG C, and the heat preservation time ranges from 20 min to 40 min. The rolling method is high in production efficiency, the difference between the tensile strength of the obtained titanium alloy plate in the direction parallel to the rolling direction and the tensile strength of the obtained titanium alloy plate in the direction perpendicular to the rolling direction is small, and anisotropy of the titanium alloy plate is greatly relieved.

The invention relates to the field of seamless steel pipe production, in particular to a high-performance seamless steel pipe intelligent production device which comprises a workbench, a connecting block, a discharging strip set and the like. The workbench is connected with a connecting block; and the connecting block is connected with a blanking strip group. According to the seamless round pipe and square pipe cutting device, seamless round pipes and seamless square pipes to be cut can be supported through cooperation of the discharging strip sets and the limiting strips, cutting stability is kept, after cutting is completed, the cut seamless round pipes or seamless square pipes can be guided downwards in an inclined mode and stacked through the obliquely-arranged discharging strip sets, and the seamless round pipes or seamless square pipes can be cut through the discharging strip sets. The cut seamless round pipes or seamless square pipes do not need to be manually picked up and stacked, the production efficiency is improved, the seamless round pipes rolling along the discharging strip set are intercepted and buffered through the intercepting assembly, the situation that the rolling speed of the seamless round pipes on the discharging strip set is gradually increased is avoided, and finally the discharging strip set is rapidly punched down.

The invention relates to a high-precision dynamic control method for wires and bars and a four-roller reducing and sizing rolling system, and belongs to the technical field of steel rolling. Aiming at the problems of insufficient dimensional precision, surface defects and low ovality of the existing two-roller and three-roller reducing and sizing mill, the invention provides a scheme for integrating a reducing rolling mill unit and a four-roller sizing mill, the single-pass compression ratio of the reducing rolling mill is 1.10-1.35, the single-pass compression ratio of the four-roller sizing mill is 1.001-1.10, and + / -0.001 mm precision control is realized by combining a dynamic roll gap adjusting system. Through an ellipse-circle-multi-section arc pass system, a roll gap compensation algorithm and Ki integral, the dimensional deviation is corrected in real time, finally, the dimensional precision of a finished wire and bar reaches + / -0.05 mm, the ovality is smaller than 0.05, the rolling speed is 140 m / s and 25 m / s at most, the service life of a roll collar is prolonged by 30%, and the production cost is reduced by 15%.

The present invention belongs to the technical field of non-oriented silicon steel production and discloses a method for improving the cold-rolled edge quality of high-grade non-oriented silicon steel burr coils. The method comprises: cold rolling using a multi-stand continuous rolling mill or a single-stand reversible rolling mill for 5 to 7 rolling passes, controlling the flatness of the plate after the first, second, and final rolling passes to meet a specific formula; in addition, the rolling speed of the first pass, the emulsion flow rate of the first and second passes, and the original roughness of the mill work rolls can be further controlled. The present invention achieves the purpose of controlling rolled edge cracks and reducing edge waves by adopting a large edge wave rolling mode and adjusting the rolling speed, emulsion flow rate, and the original roughness of the work rolls, thereby achieving optimal cold-rolled edge quality of the burr coils and improving production efficiency and product yield.

The compression roller device for testing the peel strength of the adhesive tape comprises a placing table, a driving assembly and a rolling assembly, and a sample groove is formed in the top surface of the placing table in the length direction; the rolling assembly comprises a compression roller suspended at the top of the sample groove, and two ends of a roller shaft of the compression roller are respectively driven by a pair of cylinders to lift along the longitudinal direction; the air cylinder is driven by the driving assembly to transversely move in the length direction of the sample groove. The driving rods of the two air cylinders are driven to drive the roller seats to drive the pressing rollers to move in the height direction, the pressing rollers are controlled to press or be away from a sample plate on the placing table, then the sliding blocks drive the air cylinders to slide in the length direction of the first lead screws, and therefore it is guaranteed that the rolling speed and pressure are kept consistent when adhesive tape on the sample plate is pressed; and a relatively large operation error on a measurement result during a peel strength test is avoided, and the measurement accuracy is improved. And through the pressing assembly, the stability of the adhesive tape and the sample plate in the pressing process is kept, the pressing effect is good, the efficiency is high, and very high practicability and wide applicability are achieved.

The invention discloses a preparation method of a copper bar with zero high-temperature heating defect, which comprises the following steps of: smelting, up-drawing continuous casting, rolling, coiling, peeling, multi-pass coiling, reserved bottom annealing and drawing, the hydrogen embrittlement grade of the copper rod subjected to upward continuous casting reaches the second grade or below; in the rolling process, the rolling speed is 3-10 m / min, and the machining rate is larger than or equal to 30%. The hydrogen embrittlement grade of the copper rod is reduced, the surface defects of the copper rod are eliminated, and the liquid leakage condition during high-temperature heating is avoided by raising the height of the cooling water tank during upward continuous casting and combining cold machining modes such as rolling and coiling.

The invention provides an aluminum alloy round aluminum rod production process optimization control method, and relates to the technical field of control optimization, and the method comprises the steps: obtaining initial process parameters of each production link, and constructing a weight matrix; collecting dynamic output characteristics and environment interference parameters of each production link in real time; constructing a smelting-casting correction model, and predicting and outputting a casting temperature correction parameter and a casting speed correction parameter; constructing a casting-rolling correction model, and predicting and outputting a rolling temperature correction parameter and a rolling speed correction parameter; constructing a rolling-heat treatment correction model, and predicting and outputting a heat treatment temperature correction parameter and a heat preservation time correction parameter; and on the basis of the correction parameters output by all the models, progressive control parameter correction is carried out on casting, rolling and heat treatment links in combination with a preset fluctuation early warning threshold value, and the weight matrix is dynamically updated according to the correction effect. The technical problems that in the prior art, in aluminum alloy round aluminum rod production, product performance fluctuation is large, and the percent of pass is low are solved.

The invention discloses a roller grinding management method based on the surface quality of a copper plate strip, and aims to solve the problems that existing roller grinding depends on experience, positioning is inaccurate, and grinding is excessive or insufficient. The method comprises the following steps: collecting waveform data of copper print defects and flatness on the surface of a copper plate strip, and performing timestamp synchronous calibration with a rolling speed and a coil length counting signal of a rolling mill; constructing a roller damage reverse diagnosis mechanism, calculating a damage angle in combination with a copper printing coordinate, identifying a damage type, and calculating a wear depth; differentiated grinding work orders are generated according to different damage types, and high-precision positioning grinding is executed; and after returning to the production line, carrying out on-line real-time monitoring and off-line sample rechecking on the original damaged position, dynamically adjusting parameters and judging the grinding fit state. Precision, differentiation and closed-loop management of roller grinding are achieved, the grinding efficiency is effectively improved, the service life of the roller is effectively prolonged, the surface quality of a copper plate strip is remarkably improved, and the defect rate is reduced.

The invention relates to an aluminum plate casting and rolling control method and system, and the method comprises the steps: collecting real-time technological parameters, including molten aluminum temperature, aluminum plate thickness, rolling speed, rolling pressure, cooling speed and surface quality information, in an aluminum plate casting and rolling process, and predicting aluminum plate temperature distribution, stress strain, thickness change and potential defects based on thermodynamics and mechanical models; the casting speed, the rolling speed, the rolling pressure and the cooling condition of the molten aluminum are dynamically adjusted, closed-loop control is achieved, the system comprises a data acquisition module, a data processing and analysis module, a control and execution module and a man-machine interaction and visualization module, and the system supports automatic correction of thickness deviation and surface defects, abnormal alarm and historical data analysis. The method adopts model predictive control, an artificial intelligence algorithm or a hybrid optimization algorithm to realize adaptive control. The method has the advantages that the thickness uniformity and the surface quality are optimized, the production efficiency and reliability are improved, and the safe, intelligent and efficient operation effect in the aluminum plate casting and rolling process is achieved.

The invention relates to a processing method of a battery aluminum foil blank, which comprises the following steps: casting and rolling a melt to obtain a cast and rolled coil, and controlling casting and rolling parameters during casting and rolling, the casting and rolling parameters comprising the melt temperature in a front box, the temperature and pressure of cooling water, the rolling force, the rolling speed and the coiling tension, so that the middle convexity of the obtained cast and rolled coil is 0.1-1.0%, and the thickness difference of two side parts is less than 0.05 mm; cold rolling is conducted on the cast-rolled coil to obtain a battery aluminum foil blank finished product, cold rolling comprises rolling from the first pass to the fifth pass, and during rolling, rolling parameters of all rolling passes in cold rolling are controlled, so that the thickness difference fluctuation of the obtained battery aluminum foil blank finished product is smaller than 0.8%; the rolling parameters comprise the machining rate, the rolling speed, the inlet tension, the outlet tension and the plate shape curve, so that the thickness precision of the battery aluminum foil blank is improved, the plate shape flatness of the battery aluminum foil blank is guaranteed, and the final plate shape flatness and the thickness precision of the battery aluminum foil are improved.

The present disclosure relates to a press bonding apparatus for an electrode foil of an all-solid-state secondary battery including an asymmetric rolling press element that may precisely adjust the supply speed and rolling speed while preventing damage to metal foils, thereby improving the uniformity and coating flatness of the electrode foil.

The invention relates to the technical field of bearing manufacturing, and provides a high-strength and high-toughness double-peak tempering heat treatment method for aero-engine high-nitrogen bearing steel, which comprises the following steps: a steel ingot of the high-nitrogen bearing steel is subjected to cold rolling after being forged and annealed, the rolling speed is less than 10m / min, and the rolling deformation is 30-40%; after a rolled workpiece is austenitized, the workpiece is sequentially subjected to first-time deep cooling (-196 DEG C to-80 DEG C), pre-strengthening tempering (160-180 DEG C), second-time deep cooling (-196 DEG C to-80 DEG C) and final strengthening tempering (450-500 DEG C), and the high-strength and high-toughness aero-engine high-nitrogen bearing steel is obtained. According to the high-strength, high-toughness and high-corrosion-resistance forming and manufacturing method, the high-strength, high-toughness and high-corrosion-resistance requirements of a bearing under the extreme working condition of an aero-engine are met, the tempering technology of'double-peak tempering 'formed by cold rolling forming in advance, pre-strengthening tempering and final strengthening tempering is organically combined, a double-strength structure of solution strengthening and precipitation strengthening is obtained, and the high-strength, high-toughness and high-corrosion-resistance forming and manufacturing method is achieved.

The invention discloses a method for producing a 15CrMo steel plate with low toughness-brittle transition temperature and low yield strength ratio, including electric furnace smelting, continuous casting, heating and rolling processes; wherein the rolling process adopts hot rolling + water cooling controlled red return + stacking process, and controls the final rolling temperature to be ≥950°C; after rolling, the steel plate is cooled in water, the water temperature is ≥890°C, the roller speed is 2-7m / min, and the water red return temperature is 500-600°C; the steel temperature is 400-500°C, and the stacking is 24-30h. The 15CrMo steel plate produced by the above process has a ton steel production cost reduced by 200-400 yuan / ton steel, a toughness-brittle transition temperature ≤-35°C, a tensile strength of 480-590MPa, a yield strength of 310-460MPa, and a yield strength ratio ≤0.85.

The embodiment of the invention provides a finish rolling speed and strip steel parameter setting method which comprises the following steps: when the head of strip steel reaches an inlet of a finish rolling unit, detecting the head temperature of the strip steel, and obtaining strip steel working plan parameters corresponding to the strip steel from a working plan; according to the head temperature of the strip steel and the corresponding work plan parameters, a strip steel speed and cooling water parameter table is inquired, a target record item is obtained through matching, and a speed parameter and a cooling water supply parameter corresponding to the target record item serve as a speed parameter and a cooling water supply parameter of the strip steel in the finish rolling period; and the speed parameter and the cooling water supply parameter of the strip steel in the finish rolling period are sent to the secondary model.

The invention relates to a strip steel parameter setting method under hot rolling fast-paced production, and belongs to the technical field of hot continuous rolling plate production methods. According to the technical scheme, the length of the tail of the strip steel out of an F7 finishing mill is collected, the accurate position of the tail of the strip steel on a laminar flow roller way is accurately judged, and accurate setting of model control completion points of the strip steel at different rolling speeds is achieved by applying the position of the strip steel on the laminar flow roller way; and the length is flexibly set on an operation interface according to the thickness of the strip steel and the rolling speed, so that the model can timely collect a strip steel control completion point under different rolling rhythms of a hot rolling production line. The method has the beneficial effects that the model is ensured to accurately set and control each coil of strip steel, the quality problem that the performance of a product is not consistent due to the fact that the strip steel cannot receive set data under fast-paced production can be effectively eradicated, and on-site implementation is facilitated.

The invention discloses a rolling method of steel for a middle beam of a train compartment, and belongs to the technical field of steel rolling. By optimizing the heating system, the temperature uniformity of the steel billet is ensured, the temperature difference stress is reduced, the subsequent rolling process can be smoothly carried out, and the product quality is improved. According to the method, the rolling reduction and rolling speed of rough rolling, intermediate rolling and finish rolling passes are reasonably distributed, so that deformation of all parts of the steel is uniform, the dimensional precision of the 310 Z-shaped steel for the middle beam of the train carriage is effectively improved, and the defects of lateral bending, torsion and the like are reduced. According to the invention, a proper cooling mode and cooling speed control are adopted, so that good organizational structure and mechanical properties can be obtained, the performance consistency of products is improved, and the requirements of high-end application fields are met. According to the rolling method, the number of rolling passes is reduced, the production efficiency is improved, meanwhile, the energy consumption is reduced, the production cost is reduced, and remarkable economic benefits and social benefits are achieved.