237results about "Roll speed control device" patented technology

The invention discloses a hot-rolled strip steel coiling temperature control method and related equipment, and relates to the technical field of hot-rolled strip steel, and the method comprises the following steps: determining a constant finish rolling speed of strip steel through a quadratic programming optimization algorithm based on a finish rolling outlet speed set value and a target finish rolling temperature of the strip steel; controlling the strip steel to pass through a laminar cooling area at a constant finish rolling speed and reach a target finish rolling temperature; the steel type specification, the constant finish rolling speed and the target finish rolling temperature of the strip steel are input into the heat flow density prediction model, and the heat flow density self-adaptive coefficient of the laminar cooling area is output through the heat flow density prediction model; based on the heat flow density self-adaptive coefficient and the target coiling temperature of the strip steel, the head preset header water quantity of the strip steel is determined; and in the process that the strip steel passes through the laminar cooling area, the head actual header water quantity of the strip steel is adjusted to the head preset header water quantity, so that the coiling temperature of the strip steel reaches the target coiling temperature.

The invention relates to the technical field of metal plate rolling processing, and discloses a rolling strengthening method capable of reducing the rigidity of a metal plate, which comprises the following steps: applying an asymmetric rolling condition to an initial plate to enable the plate to generate a speed gradient in the thickness direction; the plate is subjected to one-pass large-rolling-reduction rolling, and a non-continuously-distributed shear band is formed; the rolled plate is heated to the dynamic recrystallization temperature interval of the plate, and multi-pass small-rolling-reduction warm rolling is conducted on the plate; and in the warm rolling process, dynamic recrystallization of a shear band is promoted to form a grain-refined continuous core layer, complete recrystallization of the surface structure of the plate is inhibited to keep the work hardening state of the plate, and therefore the metal plate with the rigidity lower than that of an initial plate is obtained. According to the invention, a soft core-hard shell heterostructure is constructed in the plate, high strength and low macroscopic rigidity are synergistically realized, the process controllability is strong, and the method is suitable for preparation of high-performance structural materials.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

This invention provides a thickness control method for a single-stand reversible cold rolling mill. The single-stand reversible cold rolling mill unit includes an inlet coiler, an outlet coiler, a mill body, a mill hydraulic system, an inlet thickness gauge, an outlet thickness gauge, an inlet speed gauge, an outlet speed gauge, an inlet tension gauge, and an outlet tension gauge. The single-stand reversible cold rolling mill unit also includes an S-roll, with S-rolls at both the inlet and outlet of the unit. The S-roll can rotate 180°, with the upper roll of the S-roll able to rotate to the lower roll position and the lower roll of the S-roll able to rotate to the upper roll position. The 180° rotation causes the strip steel to wind in an S-shape on the S-roll. The thickness difference of the strip steel is eliminated by adjusting the speed of the inlet S-roll to control the metal flow rate entering the roll gap.

The application discloses a kind of hot rolling mill set roll motor overload pre-determination method.The method includes: pre-setting a current sampling time;In the current sampling time of pre-setting, the roll motor current data of each rolling unit in hot rolling mill set is periodically sampled;The maximum overload rate of hot rolling mill set roll motor in current sampling time is calculated;Judge whether the maximum overload rate is less than overload rate determination threshold;Judge whether the next piece of steel computer set rolling force is less than overload rolling force determination threshold;If the maximum overload rate is greater than overload rate determination threshold and computer set rolling force is greater than overload rolling force determination threshold, then determine that hot rolling mill set roll motor will overload.The roll motor overload pre-determination method of the application can accurately predict the hot rolling mill set roll motor overload jump power in time, control the rolling rhythm of hot rolling mill set, and avoid the situation that hot rolling mill set roll motor appears jump power and stops due to the too fast rolling rhythm of hot rolling mill set.

The invention belongs to the technical field of bar production, and particularly relates to a production method of a steel bar for a heavy-load automobile half axle, and the steel bar comprises the following chemical components in percentage by mass: 0.39-0.42% of C, 0.25-0.35% of Si, 1.45-1.70% of Mn, less than or equal to 0.013% of P, less than or equal to 0.006% of S, less than or equal to 0.25% of Cr, less than or equal to 0.25% of Ni, 0.15-0.20% of Mo, 0.06-0.10% of V, less than or equal to 0.15% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that high-performance, high-purity and low-cost production of the steel bar for the heavy-duty automobile half shaft is realized through green short-process production of'ecological electric furnace + LF + RH + continuous casting 'in combination with low-carbon component design and a controlled rolling and controlled cooling process. And macrostructures and non-metallic inclusions of the finished steel meet the requirements of high-end products.

The invention relates to the technical field of stainless steel thin strip preparation, in particular to a short-process preparation method for continuous casting of a 304 stainless steel thin strip, which comprises the following steps: smelting to obtain molten steel with unique components; the molten steel is subjected to twin-roll thin-strip continuous casting to obtain a cast strip; pickling; asynchronous cold rolling; and carrying out online pulse current annealing. According to the invention, unique molten steel components are adopted, so that the formation of a ferrite phase is inhibited in the casting process when the 304 stainless steel is subjected to twin-roll thin-strip continuous casting, and a cast strip obtained through twin-roll thin-strip continuous casting has no obvious segregation; meanwhile, the cast strip is subjected to one-step cold rolling and short-time annealing to obtain a finished product strip, and the shortest technological process is achieved; the short-time annealing adopts pulse current short-time annealing, the obtained finished product meets the performance requirement, and the technological process is greatly shortened; asynchronous cold rolling is adopted for cold rolling, the energy consumption and the equipment load in the rolling process can be reduced through the asynchronous cold rolling, meanwhile, surface defects in conventional rolling can be restrained, the surface quality of products is guaranteed, and the thickness uniformity is improved.

The application discloses a method for controlling damage of a high-speed rod product rack roller ring, and relates to the technical field of rod rolling processes, which comprises the following steps: obtaining working parameters of finishing mills in each production stage in a high-speed rod rolling production line; extracting the working parameters of the finishing mills in the finishing stage; and adjusting the working parameters of the finishing mills in the finishing stage to control the damage frequency of the roller ring of the finishing product rack. Through the method, the tension between the rolling pieces in the finishing mill is controlled, the head biting impact of the rolling pieces is controlled, the upper pressing method is adopted for the finishing product rack, and the roller ring cooling water is improved, so that the stability of the steel biting and the cooling effect of the roller ring are controlled, the production accidents caused by the damage of the roller ring of the finishing product rack are reduced, and stable production is realized.

A reversing roughing mill for rough rolling an aluminium or aluminium alloy product fed along a feed plane, the roughing mill comprising: a reversing horizontal roughing stand 1; a first cooling device 10 arranged upstream of the reversing roughing stand 1 and configured to cool the product entering the reversing roughing stand 1 from above with a cooling liquid; and a second cooling device 15 arranged downstream of the reversing roughing stand 1 and configured to cool the product entering the reversing roughing stand 1 from above with the cooling liquid.

A method for manufacturing a pearlitic steel rail having high surface hardness, relating to the technical field of iron and steel smelting. The method comprises: feeding molten steel having undergone preliminary smelting into a ladle refining furnace, and adding an alloying element for deoxidization and alloying treatment to obtain refined molten steel, so as to further obtain a continuous casting billet; heating the continuous casting billet to a preset temperature by means of a heating furnace, and feeding the heated continuous casting billet into a rolling mill for multi-pass rolling comprising first-pass rolling and second-pass rolling, wherein during the first-pass rolling, the rolling speed is 5.0-7.5 s-1, and the rolling deformation should be 10-15%; after the first-pass rolling, the original austenite grain size is 85-115 μm; and the number of rolling passes is 9-13, and the total deformation is 85-95%; and gradually reducing the gap between rollers of the rolling mill to obtain steel rail blocks having desired specifications and shapes and performing on-line heat treatment and processing treatment on the steel rail blocks to obtain steel rails.

The invention belongs to the technical field of bar production, and particularly relates to a steel bar for an engine crankshaft and a production method thereof, and the steel bar comprises the following chemical components in percentage by mass: 0.25%-0.30% of C, 0.20%-0.30% of Si, 1.00%-1.10% of Mn, less than or equal to 0.015% of P, less than or equal to 0.008% of S, 1.20%-1.30% of Cr, less than or equal to 0.25% of Ni, 0.05%-0.09% of Ti, 0.15%-0.20% of Mo, 0.06%-0.10% of V, less than or equal to 0.10% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that the steel bar for the engine crankshaft is produced by adopting the ecological electric furnace + LF + RH + continuous casting smelting process and the rolling process, and the strict requirements of the steel bar for the high-end engine crankshaft in the aspects of obdurability, fatigue life and surface quality are met.

The application discloses a preparation method of a 1.5mm hot-rolled 800MPa-grade weather-resistant photovoltaic support steel in the field of hot-rolling steel production, and the method comprises the following steps: adopting a steel grade component with 800MPa-grade weather resistance, controlling the thickness and length of the steel casting blank; adopting a hot feeding and hot charging mode for heating; rough rolling and finish rolling are carried out; laminar cooling is carried out on the steel strip after finish rolling; and finally, coiling is carried out. The application adopts a plate blank with a proper length, which is beneficial to reducing the temperature difference of the intermediate blank and the head and tail of the steel coil, the hot feeding and hot charging mode is adopted for heating, the core temperature of the plate blank can be improved, the rolling is stable, the rough rolling is carried out for four passes, the temperature drop at the entrance of the finish rolling is further reduced, and through reasonable control of the rolling speed, the plate crown, the loop amount, the bending force and the roll shifting amount and other processes in the finish rolling process, the 1.5mm thick hot-rolled steel plate has the advantages of good rolling stability, good weather resistance and excellent comprehensive performance, and the production efficiency and the yield of the extremely thin gauge hot-rolled high-strength weather-resistant steel plate can be improved.

The application discloses a kind of composite board cold rolling speed-rolling force-tension collaborative control system and method, based on multilayer composite board cold rolling data, first utilize the time sequence feature extraction ability of GRU network, realize the multi-step dynamic prediction of rolling key parameters, and realize feedforward control using online optimization;Combined with fuzzy PID adaptive compensation strategy, effectively suppress the influence of external disturbance and parameter time-varying;The two are combined in a weighted fusion manner, which ensures foresight and considers real-time disturbance effects, achieving a kind of composite board cold rolling speed-rolling force-tension collaborative control.The composite board cold rolling speed-rolling force-tension collaborative control system and method proposed by the application not only has better control effect, but also has stronger generalization ability and anti-interference, greatly improves the control precision and stability of multilayer composite board cold rolling, and can be widely applied in multilayer composite board cold rolling production process.

The invention discloses a method for reducing high-grade non-oriented electrical steel rolling strip breakage, and relates to the technical field of non-oriented electrical steel production. Comprising the following steps of smelting, continuous casting, hot rolling, finishing, normalizing and pickling, rolling, annealing and coating, rewinding and slitting and packaging. The temperature of normalizing treatment is 820-850 DEG C, and cooling is conducted at the cooling speed of 30-50 DEG C / s after normalizing treatment; after acid pickling, the edge of the strip steel is heated to 150-200 DEG C, and then edge cutting is conducted; in the rolling step, the reduction rate of the first pass is controlled to be 32-33%; when the diameter phi of the steel coil is 508-800mm, the coiling tension adopts a taper tension control mode; when the coiling diameter of the strip steel reaches phi 800mm, the coiling tension adopts a constant tension control mode; the rolling strip breakage rate of the high-grade non-oriented electrical steel can be reduced to 40% or below, the production stability and the yield are remarkably improved, and the method is suitable for industrial large-scale production.

The invention provides a continuous rolling-foaming integrated preparation process of a heat insulation aluminum profile for a building, and belongs to the technical field of building aluminum profile processing. The process comprises the steps of aluminum profile pretreatment, continuous rolling forming, foaming material injection, composite rolling-foaming integration and low-temperature curing. Impurities on the surface of the aluminum blank are removed through degreasing and alkali washing in pretreatment; the continuous rolling adopts a five-pass die to synchronously heat and form, and the pass reduction rate is gradually reduced step by step; the foaming material is composed of a polyurethane prepolymer, hollow glass beads and the like, and is synchronously injected according to 70-80% of the volume of the aluminum groove. During composite rolling and foaming, joint closing and foaming are synchronously completed under pressure and high temperature, and waste heat is utilized for heat preservation during low-temperature curing. Through process integration and waste heat recovery, energy consumption is reduced, and production efficiency is improved.

The invention relates to a method for operating a rolling mill and to a corresponding rolling mill. The rolling mill comprises a plurality of rolling stands n, numbered n=1 to N, arranged one behind the other in a rolling direction R, each with two rotary-driven work rolls for rolling a metal strip. Furthermore, a strip tension control loop 120 is provided for controlling the actual strip tension of the metal strip 20 in a drawing section 110 between two rolling stands arranged one behind the other to a predetermined target strip tension. In order to reduce thickness deviations in the metal strip being rolled due to acceleration and / or deceleration phases within the framework of said strip tension control, the invention provides that the control variable is applied not only to a rolling stand limiting the drawing section 110 on the exit or entry side, but also to the rotary drives for other rolling stands or rolls upstream or downstream.According to the invention, at least one rotary drive is integrated into the active belt tension control both before and after the belt section.

This invention belongs to the field of alloy preparation technology, and specifically relates to a TB5 titanium alloy wire and its cold drawing preparation method. Firstly, the forging and rolling of the TB5 titanium alloy involves selecting a large deformation amount and a low processing temperature, effectively ensuring that the coarse microstructure is broken down to a certain extent, improving the internal structure and increasing plasticity. Then, the surface oxide scale of the TB5 titanium alloy wire is removed to avoid introducing oxygen, hydrogen, nitrogen, and carbon elements. Next, online solution treatment is used to regulate the microstructure, improving the cold working performance and microstructure uniformity of the wire. Finally, roll drawing is performed to cold work the wire to reduce its diameter, effectively avoiding problems such as film adhesion and surface scratches, extending the service life of the drawing die. Simultaneously, the TB5 titanium alloy wire exhibits good grain size and microstructure uniformity, meeting the requirements for use. The final TB5 titanium alloy wire is delivered directly in a bright state and can be used for subsequent processing.

The application discloses a production method of stainless precision strip steel with reduced surface contact resistance, which comprises the following steps: an austenitic cold-rolled stainless steel strip with a thickness of 0.3-0.35 mm is subjected to surface solid solution pickling to obtain a stainless steel raw material strip; a twenty-roller rolling mill is used to roll the stainless steel raw material strip to obtain a finished steel strip with a thickness of 0.1 mm; and the finished steel strip is subjected to cleaning, bright annealing and tension leveling. The application further discloses a stainless precision strip steel with reduced surface contact resistance manufactured by using the production method and a stack bipolar plate manufactured from the stainless precision strip steel. The application can realize that the surface contact resistance of the precision strip steel is less than or equal to 50 mΩ·cm 2 The cold-rolled steel plate with low contact resistance is provided for downstream stamping forming users, and subsequent production processes can avoid surface treatment or reduce the surface treatment process.

The application discloses a kind of hot-rolled thin gauge strip and its laminar cooling control method of starting to suit, method includes the following steps: S1, adjust the last stand transition plate height of finishing rolling;S2, control thin gauge strip heating target temperature of furnace;S3, rough rolling is carried out production organization using 1+5 mode, and after finishing rolling is completed, control rolling mill automatic speed reduction;S4, laminar cooling starts to supply water cooling strip by the 50th header.This application controls the speed of hot-rolled production line, equipment precision and laminar cooling time by reasonable control, thereby realizing the control of thin gauge strip laminar cooling starting to suit problem, and the number of rolls of laminar cooling starting to suit defect is greatly reduced by implementing relevant control technology, creating greater economic benefits, and the improvement effect is remarkable.

To make an unformed portion of an electrode sheet easily and uniformly stretchable.SOLUTION: An electrode sheet manufacturing device 1 includes: a support roll 61 for supporting an electrode sheet 10; a pressing roll 62 disposed to face the support roll 61 with the electrode sheet 10 interposed therebetween, at least the outer peripheral surface of the pressing roll 62 being formed of rubber; and a control device 100. In the control device 100, a movement control unit 105 moves a pressing roll 62 from a first position P1 away from the electrode sheet 10 toward a second position P2 at which the pressing roll 62 contacts the electrode sheet 10 before conveyance of the electrode sheet 10 is started, a conveyance control unit 107 conveys the electrode sheet 10 after the pressing roll 62 has moved to the second position P2, and a pressing control unit 109 presses the pressing roll 62 against the electrode sheet 10 from the second position P2 when conveyance of the electrode sheet 10 is started or when a reference time T2 has elapsed after conveyance of the electrode sheet 10 is started.SELECTED DRAWING: Figure 9

The invention relates to the technical field of lithium copper composite belt machining, and provides a lithium copper composite belt machining device which comprises a composite roller set, a calendering roller set, a copper belt roller set, a release film roller set and a winding roller set. The composite roller set comprises two composite rollers which are sequentially arranged in the left-right direction, the calendering roller sets are used for calendering and thinning a lithium strip, the two calendering roller sets are arranged on the two sides of the composite roller set in a mirror symmetry mode, each calendering roller set comprises an upper calendering roller and a lower calendering roller which are sequentially arranged in the up-down direction, and the copper strip roller set is used for providing a preset copper strip for the composite roller set. The release film roller set is used for providing a release film for the calendering roller set, and the release film covers the surface of the lithium strip in the calendering process. According to the lithium copper composite belt machining device, the technological process of the composite belt is simplified, the production efficiency of the composite belt is improved, and the product quality of the composite belt is improved.

According to the present invention, a speed control method for a continuous processing line involves an optimization problem that involves: a model that represents the change over time in the lengths of a material to be processed at processing equipment and retention equipment of a continuous processing line; constraint conditions for the length, speed, and working conditions of the material to be processed at the processing equipment; and an evaluation function that includes the speed of the material to be processed at the processing equipment and the retention amount of the material to be processed at the retention equipment. A control device solves the optimization problem at a regular time interval or every time a prescribed event occurs to calculate a command value for controlling the speed of the material to be processed as included in the evaluation function and manages the speed of the material to be processed on the basis of the calculated command value.

The invention provides a method for matching the continuous rolling speed of a roughing mill and a finishing mill, which comprises the following steps: S1, acquiring the running speed information of a first finishing mill in real time, the running speed information comprising a roller linear speed obtained by a speed measurement encoder mounted on a motor of an F1 mill; the speed of the rolled piece at the inlet of the rolling mill is obtained through a speed measuring encoder arranged on an outlet pinch roll of the finish rolling descaling box; s2, target values of outlet speeds of rolled pieces of the roughing mill in different rolling stages are calculated and set, and stepped speed control reference values of roller ways in all areas between an outlet of the roughing mill and an inlet of a finishing mill are calculated and set; and S3, according to the target value of the speed and the stepped speed control reference value set in the step S2, a roughing mill, a finishing mill and all sections of roller ways are controlled in a linkage mode. On the premise that the hot rolling production and use precision is guaranteed, it is guaranteed that the roughing mill and the finish rolling first mill work synchronously at the same speed, the roughing and finish rolling continuous rolling function is achieved, and the rolling rhythm is improved.

The invention provides an intelligent acceleration method and system based on the production state of a rolling mill. The intelligent acceleration method comprises the steps that multi-dimensional rolling mill real-time actual values such as tension difference, a forward slip value and a current load are collected; constructing an HMI picture with threshold setting and parameter selection functions; the actual value of the using state is compared with a threshold value in real time in the speed increasing process, acceleration is stopped if the threshold value is exceeded, and acceleration is continued if the threshold value reaches the standard; acceleration rate is dynamically adjusted and stepped / continuous acceleration mode selection is provided. According to the method, hardware does not need to be newly added, automation of the acceleration process is achieved through software logic optimization, manual intervention and errors are reduced, the operation stability and production efficiency of the rolling mill are improved, the requirements of different steel types and rolling specifications are met, data traceability is achieved, and process optimization is facilitated.

A rolling control device (10) updates a preset load value Pset based on operation actual results at timings ta to tb. The rolling control device (10) derives a plasticity coefficient Qchk based on operation actual results at timings tb to tc. When the determining that it is necessary to re-update the updated preset load value Pset based on the plasticity coefficient Qchk, the rolling control device (10) updates the preset load value Pset again based on the operation actual results at the timings tb to tc.

A kind of TiAl alloy shaped blank package rolling method of imitating asynchronous rolling and TiAl alloy plate, the method comprises the following steps: preparing TiAl alloy shaped blank; The prepared TiAl alloy shaped blank is placed in the recess of corresponding stainless steel package, a composite isolation layer is filled between the TiAl alloy shaped blank and the outer layer stainless steel package, and welding is carried out, to obtain the TiAl alloy package blank of imitating asynchronous rolling;The obtained TiAl alloy package blank of imitating asynchronous rolling is placed in high temperature furnace, heated to 1100-1350 DEG C, and kept for 0.5-5h, then package rolling is carried out along the specified direction, and after every two passes, it is returned to the furnace and kept for 5-30min, after rolling, the rolled TiAl alloy package plate is placed in vacuum furnace for stress relief annealing;And the package shell on the rolled TiAl alloy package plate is removed by wire cutting method, to obtain TiAl alloy plate with deformation≥90%.The application also provides TiAl alloy plate prepared by the method.

The application discloses a kind of composite board hot rolling speed-deformation-pressure coupling control system and method, based on multilayer composite board hot rolling data, using long short-term memory network establishes space-time sequence prediction model, and according to the deviation of prediction quality and target quality, using multi-objective balanced optimization algorithm to feed forward correction is carried out to roll gap.On the basis of feed forward correction, the residual between thickness actual value and set outlet thickness is further considered, and a roll gap feedback adjustment strategy is designed, realizing the coupling control of composite board hot rolling speed-deformation-pressure.The composite board hot rolling speed-deformation-pressure coupling control method proposed in the application has high control precision, makes up for the defects of traditional methods, improves the speed-deformation-rolling force dynamic coupling control, and can be widely used in multilayer composite board hot rolling.

The application relates to the field of titanium alloy production and discloses a titanium alloy disc round preparation method for eliminating overheated core structure, which comprises the following steps: sequentially adopting a rough rolling mill set, a medium rolling mill set, a finishing rolling mill set, a reducing sizing mill set and a high-speed wire rolling mill set for rolling; the rough rolling mill set comprises a front rack, a middle rack and a rear rack which are sequentially arranged along a rolling direction; for the rough rolling mill set, the deformation amount of the middle rack is controlled to be greater than the deformation amounts of the front rack and the rear rack; the finishing rolling mill set comprises multiple racks and roller tables arranged between adjacent racks; for the finishing rolling mill set, the running speed of the roller table is dynamically adjusted based on a target temperature difference between a core and a surface layer of a rolled piece after finishing rolling, the length of the roller table, the diameter of the rolled piece on the roller table and the starting temperature of the rolled piece on the roller table. The titanium alloy disc round core overheated structure can be effectively eliminated.

The invention relates to the technical field of hot-rolled strip steel, and provides a method for controlling falling and powdering of oxide scale of a thick-specification plain carbon hot-rolled plate, which comprises the following steps: heating a steel billet, roughly rolling, finely rolling, cooling and curling to obtain the plain carbon steel hot-rolled plate, during finish rolling, the threading speed of the first pass is 1.0-1.3 m / s; the threading speed of the second pass is 1.2-1.4 m / s; the threading speed of the third pass is 1.5-1.7 m / s; the threading speed of the fourth pass is 1.8-2.0 m / s; the threading speed of the fifth pass is 2.0-2.2 m / s; the threading speed of the sixth pass is 2.1-2.3 m / s; and the threading speed of the seventh pass is 2.3-2.5 m / s. By means of the technical scheme, the problem that in the prior art, oxide scale of a thick-specification plain carbon hot rolled plate falls off and powdering occurs is solved.

The invention belongs to the field of metal material processing, and relates to a method for controlling surface twill of a cold-rolled thin-gauge continuously-annealed steel plate, which comprises the following steps of: on the basis of a micro-carbon nitrogen-controlled titanium component system, performing converter smelting and RH (Ruhrstahl Heraeus) refining treatment on blast furnace molten iron, and continuously casting into a short-size plate blank with a specific specification; red steel is sent to a hot continuous rolling procedure to complete high-temperature finish rolling, sparse cooling and hot head and tail high-temperature coiling, then slow cooling is conducted in a surrounding cooling mode, then the steel enters an acid continuous rolling machine procedure to conduct medium-speed rolling, a rolled hard coil in a tight-edge plate shape is obtained, finally, after low-temperature annealing, high-temperature slow cooling and large-temperature-drop overaging heat treatment are conducted in a continuous annealing procedure, the steel enters a temper mill set with a specially-set roll gap, and the rolled hard coil is obtained. And a large-flow jet lubrication and micro-leveling process is adopted to obtain the thin-specification high-strength steel coil for the cold-rolled household appliance and automobile outer plate. The production cost is low, the cost per ton of steel is saved by more than 120 yuan, the obtained thin-specification high-strength steel plate is good in performance, size and surface quality, the upper surface and the lower surface do not have common rib twill defects, and the steel plate is suitable for being popularized and applied to domestic mainstream steel and iron enterprises.