34results about "Mass flow control device" patented technology

The invention discloses an after-rolling stable position reduction type online cooling device and a control method thereof, and relates to the technical field of hot rolling cooling, the after-rolling stable position reduction type online cooling device comprises N unit type cooling mechanisms arranged in the moving direction of a cooling roller way, and each unit comprises a lifting assembly, a cooling assembly, a supporting assembly, a driving assembly and a control system. The lifting assembly drives the grating type movable framework to vertically ascend and descend through a spiral elevator, the upper collecting pipe is driven to adjust the distance between the upper collecting pipe and a hot-rolled product, the supporting assemblies are symmetrically distributed through supporting beams with I-shaped sections, and the height of the overall structure is reduced. The control method is based on unitized layout, the upper headers of a single unit are configured into 5-8 groups, the height, the flow and the cooling mode are independently regulated and controlled by the control system, and different process requirements are dynamically and accurately met. Through structure simplification, load distribution optimization and modular control, the problems that a traditional device is poor in stability, low in regulation and control precision and high in maintenance cost are solved, the cooling effect is remarkably improved, and the process adaptability and economical efficiency are improved.

The present invention discloses an on-line cooling device with post-rolling position stabilization and configuration reduction and its control method, which relates to the technical field of hot rolling cooling. It includes N unitary cooling mechanisms arranged along the moving direction of the cooling roller table. Each unit comprises a lifting assembly, a cooling assembly, a support assembly, a driving assembly and a control system. The lifting assembly drives the grid-type moving framework to vertically lift through a screw lift, driving the upper header to adjust the distance from the hot-rolled product. The support assembly is symmetrically distributed with I-shaped cross-section support beams, reducing the overall structural height. The control method is based on unitized layout. The upper headers of a single unit are configured into 5 to 8 groups, and the height, flow rate and cooling mode are independently regulated by the control system to achieve dynamic and precise adaptation to different process requirements. The present invention solves the problems of poor stability, low regulation accuracy and high maintenance cost of traditional devices by streamlining the structure, optimizing the load distribution and modular control, significantly improving the cooling effect and enhancing the process adaptability and economy.

The application provides a large-size tail section speed-up optimization control method for a wire rod, develops a reducing sizing machine, pinch rollers and a wire spooling machine relay speed-up function, and realizes automatic switching of different specifications and different speed-up modes. By using the new control method, the influence of the tail section speed-up on the finished product circle shape is eliminated, the production stability is improved, the restriction of the mechanical capacity of the reducing sizing machine, the pinch rollers and the wire spooling machine on the production of the super large-size product is reduced, the production efficiency is improved, the service life of the reducing sizing machine is prolonged, and the maintenance cost investment is reduced.

The invention discloses a hot-rolled strip steel cross crease control method which comprises the following steps: S1, a heating procedure: heating a plate blank by adopting a heating furnace, and controlling the temperature of the upper surface of the plate blank to be 20-25 DEG C higher than the temperature of the lower surface of the plate blank in a soaking section; s2, a rough rolling procedure, wherein a rough rolling machine is adopted for rolling the heated plate blank into an intermediate blank, and a rough rolling outlet intermediate roller way is put into a heat preservation cover; a finishing mill is adopted for rolling the intermediate billet into finished strip steel, cooling water between racks of the finishing mill and reverse water spraying between the racks are controlled, and the final rolling temperature set value meets the condition that the final rolling temperature is higher than the ferrite transformation temperature; and S4, the cooling and coiling procedure is conducted, specifically, strip steel is cooled to the coiling temperature through laminar cooling and coiled into coils, front-section cooling is used as the cooling mode, and the flow of an upper collecting pipe and a lower collecting pipe of laminar cooling of each section is controlled. The method can effectively eliminate the problem of cross creases caused by the temperature difference between the upper surface and the lower surface of the rolled piece, and plays a positive role in reducing the cost of production procedures; the method has the advantages of good cross crease eliminating effect, easiness in control, low cost and the like.

The present invention discloses a hot-rolled H-shaped steel including a web, a first flange plate, and a second flange plate, in which the difference in thickness between the first flange plate and the second flange plate, |T1-T2|, is greater than 0, and the ratio of the difference in area between the first flange plate and the second flange plate, |S1-S2|, to the area S1 of the first flange plate is less than or equal to 1, or the ratio of the difference in area between the first flange plate and the second flange plate, |S1-S2|, to the area S2 of the second flange plate is less than or equal to 1. The hot-rolled H-shaped steel of the present invention can meet the production requirements of various specifications in which the thicknesses of the flanges on both sides are not equal, and can also avoid the occurrence of side bending during the rolling process. The difference in the flow rate of metal per second of the flanges on both sides during the rolling process is controlled within a certain range, thereby stably producing hot-rolled H-shaped steel with the thicknesses of the flanges on both sides being not equal. The present invention further discloses a production method of hot-rolled H-shaped steel.

The invention provides a high-precision tandem cold mill second flow thickness control method which comprises the following steps: firstly, integrating an inlet / outlet second flow difference to correct a strip steel inlet speed, and pre-calculating a strip steel outlet thickness difference by using a second flow equation; compensating the speed difference between the inlet tension roller and the first rack, and correcting the second flow pre-calculation thickness difference by using the monitoring thickness difference; and finally, a self-adaptive PI controller is used for calculating the second flow thickness control quantity. According to the method, the error of the second flow of the inlet and the outlet and the speed difference between the inlet tension roller and the first rack are compensated, and the monitoring thickness difference correction is used, so that the high-precision outlet thickness difference value can be obtained. Proportions and integral parameters which change adaptively along with the speed and the response time of the adjusting mechanism are used to adapt to different working conditions, so that good control performance can be kept in the rolling process, and the overall precision of the second flow AGC is improved to a large extent.

The invention relates to the technical field of hot rolling, and discloses a quick-change type cooling temperature control device for a hot rolling production line, the quick-change type cooling temperature control device for the hot rolling production line comprises a water source branch pipe, the interior of the water source branch pipe is communicated with an electric control valve, and a flow quantitative control instrument is arranged on one side of the electric control valve; the quick assembly is arranged at one end of the water source branch pipe, the quick assembly comprises a first connector, a second connector, a connecting groove and an inserting plate, one end of the water source branch pipe is communicated with the first connector, the second connector is arranged at one end of the first connector, and the connecting groove is formed in the first connector. The quick-change type cooling temperature control device for the hot rolling production line has the advantages that on the premise of not occupying more basic space, after the quick-change type cooling temperature control device is flexibly and quickly installed on site, red steel is cooled and subjected to temperature control by adjusting the spraying amount and pressure of cooling water, and the requirement for special steel product performance is met.

The present application relates to the technical field of hot continuous rolling low carbon steel, in particular to a method for controlling the surface pitted scale defects of hot continuous rolling low carbon steel. 1) The temperature of the low carbon steel heating furnace is controlled at 1160-1200 DEG C; 2) according to the change of the target thickness of the product, the entry temperature of the finishing mill is controlled: if the target thickness is less than or equal to 2.2 mm, the entry temperature of the finishing mill is controlled at 1035-1060 DEG C; if the target thickness is greater than 2.2 mm, the entry temperature of the finishing mill is controlled at 1015-1040 DEG C; 3) the first rolling mill of the finishing mill is F1, and the Nth rolling mill is FN in turn, and the roll gap cooling water of F1-F5 is put in; 4) the hot rolling oil manifold and nozzle are installed at the outlet of the backup roll of F1-F5; 5) the high speed steel work roll is used for the rolling mill; 6) the water pressure of F1-F7 is controlled at 0.5-1.2 MPa; 7) the target value of the finish rolling temperature is controlled at 750-900 DEG C; 8) the cycle of the high speed steel work roll is controlled within 2-6 cycles; 9) the same batch of high speed steel work roll is avoided to be at the end period. The surface pitted scale defects of hot continuous rolling low carbon steel can be effectively controlled, and the surface quality of the strip steel is improved.

This invention relates to a method for controlling the cooling water volume of pre-oxidized high-speed steel rolls during the rolling of hot rolls, belonging to the technical field of control methods applicable to metal rolling mills. The method first calculates the target rolling pressure range using the rolling pressure recorded under n rolling plans for normal, non-pre-oxidized high-speed steel rolls. Then, it calculates the required cooling water volume for the pre-oxidized high-speed steel rolls. During the rolling of hot rolls with the pre-oxidized high-speed steel rolls, the rolling pressure is recorded and it is determined whether it falls within the target rolling pressure range. This determines whether the calculated cooling water volume remains unchanged. If it does, a new cooling water volume is recalculated, and this process is repeated until a suitable cooling water volume is selected. This method simultaneously correlates the roll thermal crown with both rolling pressure and cooling water volume. It judges and controls the change in roll thermal crown by whether the rolling pressure of the pre-oxidized high-speed steel roll during the rolling of hot roll material falls within the target rolling pressure range.

The invention discloses a method and equipment for reducing rolling edge cracks of common oriented silicon steel, and belongs to the technical field of steel production, and the method comprises the following steps: after being discharged from a pickling line, a plate enters a tunnel type preheating furnace 1 to be preheated, and the temperature of the plate is increased to 65-75 DEG C; the plate enters a rolling mill after being preheated, the flow rate of the emulsion in the first pass is 3500 L / min-6000 L / min, the flow rate of the emulsion in the second pass is 4500 L / min-7200 L / min, and the flow rate of the emulsion in the third pass is 7000 L / min-8000 L / min. The plate can enter the tunnel type preheating furnace before entering the rolling mill for rolling, and acid pickling waste heat is effectively kept warm. The rolling temperature of the plate in each pass is controlled to be higher than 60 DEG C by reducing the flow of the emulsion in the first two passes, and edge cracking caused by the cold brittleness characteristic in the plate rolling process is avoided.

The invention belongs to the technical field of steel production management, and provides a method for reducing oil sludge in a rolling mill stand, which comprises the following steps: determining allowable flow ranges of strip steel at different thicknesses and rolling speeds, and constructing an allowable flow range reference library; analyzing the iron powder concentration change of a filter port of the filter system of the rolling machine under different emulsion flows, and determining the allowable maximum emulsion flow; according to the thickness of the strip steel section and the rolling speed, the allowable flow range corresponding to the strip steel section is extracted from the allowable flow range reference library, and is compared with the allowable maximum emulsion flow to judge whether the emulsion flow adjustment during strip steel section rolling is needed or not; if yes, determining an emulsion flow adjusting mode during rolling of the strip steel section, and if the flow value is limited and adjusted, determining a flow analysis range, and limiting an emulsion adjusting flow value of the strip steel section according to strip steel quality data and iron powder concentration corresponding to different emulsion flows, so as to reduce generation of oil sludge.

The present application relates to a kind of methods for controlling hot-rolled high-strength pickled plate scale defects, including using descaling impact test method, checking each trace complete on test special slab, lap is not superimposed, and the gap between impact mark is ≤2mm;Production plan is from at least the 10th block in cycle, and no more than the 55th block of high-strength pickled plate is arranged;Control the sum of high-strength pickled plate second heating section and soaking section time is 100-180min;High-strength pickled plate rolling time interval is controlled at 140-210s;High-strength pickled plate is descaled in all directions, at least one pass descaling water is arranged when rough rolling;The use cycle of finishing mill work roll is less than or equal to 2 times;Increase finishing rolling lubricating oil flow;The present application greatly reduces the residual amount of hot-rolled high-strength pickled plate scale, thereby improving the surface quality of high-strength hot-rolled pickled plate, and providing strong guarantee for subsequent pickling to improve surface quality.

This application relates to the field of steel rolling technology, and discloses a method, apparatus, and electronic equipment for predicting the rolling force of a cold rolling mill. The method includes: constructing a speed-rolling force relationship model based on the rolling speed and rolling force of the cold rolling mill; constructing a flow-rate-rolling force relationship model based on the roll gap flow rate and rolling force of the cold rolling mill; constructing a rolling force prediction model based on the speed-rolling force relationship model and the flow-rate-rolling force relationship model; obtaining the actual rolling speed and actual roll gap flow rate of the cold rolling mill; and determining the actual rolling force of the cold rolling mill based on the actual rolling speed, the actual roll gap flow rate, and the rolling force prediction model. The technical solution proposed in this application can improve the accuracy of rolling force prediction for cold rolling mills and enhance the production stability and manufacturing capability of cold rolling mills.

The invention discloses a control method for a roller lubricating device of a hot continuous rolling finishing mill group. The control method comprises the following steps that S1, whether strip steel reaches a finishing mill or not is detected; s2, the rolling force and the rolling mill speed of the finishing mill during steel biting are locked; s3, establishing a roller rolling force feedback control model and a rolling speed feedback control model of the finishing mill; s4, establishing a strip steel temperature characteristic compensation coefficient; and S5, the injection time sequence of the roller lubricating device is set. The invention aims to solve the problems of poor lubricating effect, insufficient lubrication and excessive lubrication of the finish rolling vertical roll and improve the edge quality of a hot rolling strip steel finished product (especially high-grade silicon steel).

This invention discloses a control method and related equipment for segmented roll cooling, relating to the field of roll cooling. The method primarily addresses the current issues of inaccurate and ineffective roll thermal crown control. The method comprises: obtaining the number of rolling blocks and variable compensation coils after work roll replacement on a target production line; determining a cooling water compensation value based on the number of rolling blocks and variable compensation coils after work roll replacement; and adjusting the RTC device based on the cooling water compensation value. The present invention is used for the control process of segmented roll cooling.

This invention discloses a material shape control method to improve the negative difference rate of three-section rebar. By adding a clamping device between the No. 2 shear and the rolling mill, the rolled piece enters the mill horizontally, thereby reducing torsion and improving stability. The roll pass is optimized to ensure that the center line cutting hole is larger than the edge line cutting hole, with a ratio of 1:1.25. Optimization is carried out on the cooling water pipes of the finished product and the rolls before the finished product, using an intelligent cooling control system to monitor and precisely control the flow rate, pressure, and temperature of the edge and center line cooling water pipes in real time. The edge line cooling water pipe uses a 1.5-inch inlet pipe and is equipped with a variable frequency water pump with a maximum flow rate of 50 m³ / h. The system is also equipped with a backup power supply to maintain cooling control for 30 minutes during power outages. During the rolling process, if the weight difference between the center line and the edge line exceeds a threshold, the K5 material shape is adjusted in time to ensure that the center line cutting hole is filled.

This invention provides an emulsion spraying and control system for a single-stand 20-roll reversible cold rolling mill. The first spraying zone is used for lubrication and cooling of the work roll gap; the second spraying zone is used for cooling the rolls between the intermediate roll and the work roll; the third spraying zone is used for strip cooling; the fourth spraying zone is used for strip cooling; the spray head in the third spraying zone is located between the work roll and the spray head in the fourth spraying zone; and the fifth spraying zone is used for cooling the back support roll. The left upper and lower spray beams of the first spraying zone share a first control path, and the right upper and lower spray beams share a second control path. The upper left and right spray beams of the second spraying zone share a third control path, and the lower left and right spray beams share a fourth control path. The left upper and lower spray beams of the third spraying zone share a fifth control path, and the right upper and lower spray beams share a sixth control path. The left upper and lower spray beams of the fourth spraying zone share a seventh control path, and the right upper and lower spray beams share an eighth control path. The four spray beams of the fifth spraying zone share a ninth control path.

The present application belongs to the technical field of steel production, and discloses a control method for foreign matter pressing into the surface of thin strip steel. 3 The control method comprises the following steps: (1) molten steel smelting control: controlling the oxygen blowing amount of the refining furnace to be 15-18 m 3 / h; controlling the total flow of the compressed air of the No. 3 hot box on the upper surface and the lower surface of the thin strip steel to be: when rolling the thin strip steel with a specification of 1.2 mm or above, the total flow of the compressed air is controlled to be lower than 100 m 3 / h; or when rolling the thin strip steel with a specification of 1.2 mm or below, the total flow of the compressed air is controlled to be not more than 350 m 3 / h. In addition, the control method further comprises (3) flow control of rolling oil: controlling the flow of the rolling oil in rolling to be not more than 150 cc / min on the upper surface and the lower surface of the thin strip steel, respectively.

The invention discloses an anti-slip control method and system for hot continuous rolling production of an ultrathin aluminum plate base. The anti-slip control method comprises the following steps that S1, roller surface modification is conducted, specifically, a CrAlN / TiN gradient composite coating is prepared through a physical vapor deposition technology; s2, a lubricating medium is configured and supplied, specifically, the oil film thickness and flow of the finish rolling section are precisely controlled through an intelligent lubricating system; s3, setting a rolling process procedure: designing and executing a reduction rate gradient distribution strategy from rough rolling to finish rolling based on the characteristics of a hot continuous rolling unit; and S4, dynamic monitoring and adjustment are conducted, specifically, when it is detected that the rolling force fluctuation exceeds a preset threshold value, the reduction rate and the rolling speed of the target rack are automatically and finely adjusted through a rolling force-speed linkage control model. According to the collaborative anti-slip control method and system, the special roller surface, the stable lubrication interface, the matching reduction schedule and the dynamic response mechanism are integrated, the slip frequency is fundamentally reduced, strip surface scratches and roller aluminum sticking are reduced, and the product surface quality and the yield are improved.

The invention belongs to the technical field of rolling of dual-phase stainless steel plates, and discloses a rolling method of a dual-phase stainless steel cold plate. A single rolling process is adopted in the method, and the method comprises the following steps that deformation is designed, specifically, the total rolling pass is nine, the deformation of each pass in the first three passes is controlled to be 15%-17% of the thickness of the first pass, and the total deformation is not larger than 80%; the plate shape of the rolling mill is designed, specifically, the plate shape is controlled through an M-shaped curve with the edge drop ranging from-20 N / mm < 2 > to-50 N / mm < 2 > in the first three passes, and the plate shape is controlled through parabola-shaped curves in the fourth pass and the subsequent passes; rolling oil flow control: the rolling oil flow of the first three passes is controlled to be 1400-1600 L / min, and the rolling oil flow of the subsequent passes is controlled to be 2500-3500 L / min. The rolling method for the dual-phase stainless steel cold plate is more efficient, lower in cost and higher in quality when used for producing the dual-phase stainless steel cold plate.

The invention relates to the technical field of hot continuous rolling of low-carbon steel, in particular to a control method for improving the head thickness precision of low-carbon steel strip steel. The method specifically comprises the following steps that (1) the thickness of an adopted raw material plate blank ranges from 200 mm to 230 mm; (2) the tapping temperature of the heating furnace is controlled to be 1160-1200 DEG C; (3) controlling the thickness of an intermediate billet at a finish rolling inlet to be 38-48mm; 4) controlling the inlet temperature of a finishing mill according to the change of the target thickness of the product; 5) controlling the threading speed of the strip steel to be 10-12m / s; (6) the rigidity of an F1-F7 finishing mill is controlled to range from 4600 KN / mm to 5400 KN / mm; (7) determining the roll gap cooling water input quantity according to the target thickness of the product; (8) the rolling force deviation of a single rack is controlled to be reduced to be within + / -50 tons; 9) transmitting the rolling mill roll gap data corrected by the secondary model to an AGC thickness control system so as to control the thickness of the head of the strip steel; and (10) the deviation between the actual value and the set value of the thickness of the head of the strip steel is controlled within + / -0.18 mm. Energy consumption can be reduced, and the index qualification rate of the head of the low-carbon steel can be guaranteed.

The invention relates to a method for controlling the cooling water amount of a prefabricated oxide film high-speed steel roller during rolling of a hot roller, and belongs to the technical field of control methods suitable for metal rolling mills. The method comprises the following steps: firstly, calculating a rolling pressure target range by using rolling pressure recorded under n rolling plans of a normal high-speed steel roller without a prefabricated oxide film, and then calculating the roller cooling water amount required by the prefabricated oxide film high-speed steel roller; and recording the rolling pressure and judging whether the rolling pressure is within the rolling pressure target range or not so as to judge and select whether the calculated roller cooling water amount is unchanged or not, if so, re-calculating a new roller cooling water amount, and repeating the steps until the roller cooling water amount is selected. According to the method, the thermal crown of the roller is associated with rolling pressure and roller cooling water amount at the same time, and the change of the thermal crown of the roller is judged and controlled by judging whether the rolling pressure of the prefabricated oxide film high-speed steel roller during hot roller material rolling falls into a rolling pressure target range or not.

The invention relates to the technical field of titanium plate rolling, in particular to a method for controlling head buckling and head warping of a titanium plate in a rough rolling process and a titanium plate intermediate billet. The titanium plate intermediate blank is prepared by the method. The method comprises the steps that a titanium plate blank is heated, so that the temperature of the upper surface of the titanium plate blank is 10-20 DEG C higher than that of the lower surface of the titanium plate blank; conveying the titanium plate blank into a rough rolling process, and carrying out multi-pass rolling treatment to obtain a titanium plate intermediate blank of which the buckling head and the warping head are controlled; and according to the buckling head size condition occurring in the rolling treatment of each pass, the reduction level of the cooling water flow of the roller way during the rolling treatment of the next pass is controlled in time, or according to the warping head size condition occurring in the rolling treatment of each pass, the increase level of the cooling water flow of the roller way during the rolling treatment of the next pass is controlled in time. According to the method, rough rolling head buckling and head warping can be effectively controlled, and the surface quality and the production stability of the titanium material are improved.

Plant (10) for producing bars (B) starting from a long metal product (P) comprising a rolling train (11) followed by at least one flattening stand (12), at least one edging stand (13), a forming stand (14), a separation stand (15) combined with a cutting box (31) and a cutting device (18).

The invention discloses a control method for an inlet vertical roll lubricating device of a hot continuous rolling finishing mill. The control method comprises the following steps that S1, a vertical roll rolling force feedback control model is established; s2, establishing a rolling speed feedback control model; s3, establishing a strip steel billet center line deviation feedforward control model; s4, establishing a strip steel temperature characteristic compensation coefficient; and S5, the injection time sequence of the vertical roll lubricating device is set. The invention aims to solve the problems of poor lubricating effect, insufficient lubrication and excessive lubrication of the finish rolling vertical roll and improve the edge quality of a hot rolling strip steel finished product (especially high-grade silicon steel).

The application provides a method for improving surface color difference of hot-rolled aluminum plate strip, comprising the following steps: carrying out a butter experiment on the surface of a roller to verify the blocking condition of an emulsion nozzle; separately cleaning the emulsion nozzle that appears to be blocked; and controlling the emulsion injection amount during the rolling of the hot-rolled aluminum plate strip. In the method for improving surface color difference of hot-rolled aluminum plate strip provided in the application, the butter experiment is used to verify the uniformity of the emulsion nozzle injection, and the emulsion injection amount is controlled, so that the surface color difference can be reduced.

The invention discloses a three-way valve control type cooling method among finishing mill groups, which is characterized in that inter-machine cooling water paths independent of roller box panel cooling water paths are arranged among the finishing mill groups, and three-way valves are mounted on the inter-machine cooling water paths; the starting action triggering logic of the three-way valve comprises the following steps: receiving a rolled piece steel signal detected by an upstream pre-finish rolling last frame; and in combination with the speed v of the rolled piece, the distance L from the steel signal detection point to the cooling water injection point and the compensation length D of the head of the rolled piece, according to the formula T = (L / v) + delta t and delta t = D / v, the set delay T is calculated, and the three-way valve is opened after the set delay T. In this way, the three-way valve is driven to be opened by setting time delay, cooling water is opened after the tip end of the head of a rolled piece passes through a cooling injection point and when a head body reaches the cooling injection point, an inter-machine cooling water channel independent of a roller box panel cooling water channel is arranged between finishing mill groups, and the cooling effect of original roller box panel cooling water on a roller ring rolling groove cannot be affected; and the temperature rise of the rolled piece during high-speed finish rolling is better controlled.

A control method for an ultra-fast cooling system in a hot strip mill production line, belonging to the technical field of metal rolling, includes: the communication system collects the data of the rolled piece and transmits it to the process automation system, and after setting and calculation, the result is given to the basic automation system; when the rolled piece reaches the second rolling mill, the basic automation system sends the relevant flow rate and pressure mode data to the pumping station system, and the pumping station determines the frequency increase according to the water pump situation; when the strip head reaches the third rolling mill and is in the dry head control mode, the basic automation system calculates the compensation distance of the headers of the front and rear ultra-fast cooling systems; when the head reaches the fifth rolling mill, the initial opening degree of the bypass regulating valve is set and the pressure closed-loop control is started; when the head reaches the pyrometer at the exit of the finishing mill, the dynamic setting calculation is started and the pressure compensation of the front ultra-fast cooling system is processed; afterwards, according to the different positions of the strip head in the front and rear ultra-fast cooling systems, the bypass regulating valve is adjusted and the closed-loop control is switched; after the strip tail leaves each cooling area, the water pump frequency is reduced and the headers of the front and rear ultra-fast cooling systems are closed in sequence.

The invention relates to a method for operating an annealing furnace (200) for annealing a metal strip (100). According to the method, at first at least one desired target material property ME Soll is specified for a point or a section of the metal strip (100) after it has passed through the annealing furnace (200). Additionally, information E regarding the metal strip is provided upstream of or in the annealing furnace. A target temperature distribution T Soll and / or a target speed V Soll for the metal strip in the annealing furnace is then calculated with the aid of a computer-assisted model as a function of the target material property and said information. The target temperature distribution and / or target speed thus calculated are / is then set in the annealing furnace (200) in order to change the material property of the metal strip downstream of the annealing furnace into the desired target material property ME Soll.

The invention particularly relates to a control method for preventing stripping water of all racks of a hot finishing mill, and belongs to the technical field of keeping rollers in an effective state during metal rolling. According to historical finish rolling information of all strip steel stored in four-roller finish rolling, the strip steel is divided according to steel types, widths and thicknesses, and an anti-stripping water opening strategy set of all racks under the condition that the surface quality and the finish rolling temperature of the strip steel with different steel types, widths and thicknesses are guaranteed at the same time is established; when the strip steel to be subjected to finish rolling enters the four-roller finishing mill, the appropriate anti-stripping water opening strategy of each rack can be selected only by judging the steel type, width and thickness of the strip steel to be subjected to finish rolling, so that the surface quality of the strip steel to be subjected to finish rolling can be ensured without influencing the finish rolling temperature under the washing of the anti-stripping water of each rack; and the contradiction between the surface quality and the finish rolling temperature caused by fixed opening and closing of anti-stripping water of each rack according to the maximum flow in the prior art is overcome.