CN104070075B - A kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device and method - Google Patents
A kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device and method Download PDFInfo
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Abstract
A kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device and method are provided, it is characterized in that：Laminar cooling process control method includes：Parameter setting, structure property prediction, target process optimization, network data transmission, These field control modules；The device mainly includes：Mm finishing mill unit, temperature measuring equipment, temperature collecting device, cooling facility for laminar flow, edge sheltering device, coiling machine；By the Temperature Distribution of thermometric and temperature collecting device measurement and collection strip steel plate width when going out mm finishing mill unit, and analyzed and processed by data transfer into computer simulation module, to determine using suitable refrigerating mode and be controlled by the executing agency of site setup the opening and closing quantity of cooling manifold and the edge-masking amount of edge sheltering device, it is less than 50 DEG C with the temperature for regulating and controlling strip steel at inlet of coiling machine, the apparatus and method solve the structure property problem of non-uniform of strip in the width direction, it is ensured that the superior in quality and structure property of strip is uniformly distributed.
Description
Technical field：
The present invention relates to Rolling-mill Auxiliary Facilities and Computerized industrial control technical field, more particularly to a kind of hot-strip
Laminar cooling process control device and method.
Background technology：
In the prior art, the control of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure has become the control of high-strength steel sheet production process
One of important step.In order to ensure hot-strip properties of product and product quality it is excellent, the control of accurate cooling technique is
Basic guarantee.In TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure, cooling velocity control, cooling uniformity control and batched target temperature
Control is most important parameter, affects the final metallographic structure of strip product and performance.Therefore, setting up laminar flow cooling control mould
Type, the cooling velocity and structure property development law of analysis plates band and the Mathematical Modeling and strategy of improvement control coiling temperature are
Important research content as hot-strip product, there is corresponding research work to this both at home and abroad.In section cooling temperature control
In terms of simulation, external research substantially experienced following several stages：Initial research, the research of Mathematical Modeling, temperature forecast
The stages such as research, model integrated research, Developing Expert System and the Based Intelligent Control automation of model.Current section cooling at home
The Controlling model commonly used in equipment is mainly Temperature Control Model, including Italian ANSALDO INDUSTRIA companies are based on passing
Normal physical property in calorifics, the one-dimensional unsteady heat conduction Differential Equation Model without endogenous pyrogen, SIMENS companies of Germany are cold based on newton
But formula model, GE companies of the U.S. are based in cooling water water valve number and band using finite difference calculus model, nippon company
Nonlinear function model is built between steel thickness, strip speed, finishing temperature, coiling temperature and MIT is based on history
Air cooling model and water-cooled model that Di Fen-Boltzmann law, Fourier's law are set up respectively.But above-mentioned on-time model is only
To consider the temperature change in laminar cooling process, can not forecast Microstructural evolution in laminar cooling process and
The structure property of final products.At present in the Microstructural evolution and structure property prediction for laminar cooling process, mainly
Off-line prediction is carried out by related structure property model and empirical equation.For example, Xu Yunbo and Wang Guodong of Northeastern University etc.
People analyzes temperature and tissue change, the Zhao Gang for calculating course of hot rolling controlled rolling and control cooling by two dimensional finite element mode
Et al. invention " a kind of method of predicting hot-rolled Nb-contained and mechanical property " (CN200710052007.8) and king
Profit is bright to wait " a kind of course of hot rolling strip microstructure evolution and the method for performance prediction " (02109026.2) of invention etc., is all logical
Cross empirical model or FEM calculation to carry out analysis and prediction to the structure property of rolling and cooling procedure.But it is all these
The analysis that the inhomogeneities that model is not all directed to temperature and structure property of the strip along plate width direction is carried out is calculated, therefore also
Necessary foundation can not be provided rationally to use edge-masking technique during production strip；And all these models be all from
Line model, is not combined with production process, it is impossible to which technique initialization and optimization in real time for production process provides online service.
The content of the invention：
The purpose of the present invention is to be directed in strip production process to be distributed not along the Temperature Distribution and structure property of plate width direction
Uniform the problem of, it is proposed that the temperature-time calculated in laminar cooling process along plate width direction is analyzed using finite element method
Changing rule and Temperature Distribution and structure property distribution homogeneity question, and by quantitative analysis set edge-masking technique come
Improve strip center to the structure property homogeneity question of edge, while utilizing network transmission technology in systems by field demand
It is connected with forecast system, can realizes that the TEMPERATURE FOR HOT STRIP LAMINAR of online process setting and the optimization of target temperature and target capabilities is cold
But process control equipment and method.
The technical solution of the present invention is to provide a kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control method, it is characterized in that：
This method is main by TEMPERATURE FOR HOT STRIP LAMINAR cooling controller process and computer simulation block process and method two parts
Constitute, TEMPERATURE FOR HOT STRIP LAMINAR cooling controller process is：Strip is measured after mm finishing mill unit is rolled by temperature measuring equipment
The Temperature Distribution of strip steel plate width when going out mm finishing mill unit, then gathers its measurement result by temperature collecting device, will
The result of temperature survey is analyzed and processed by data transfer into computer simulation module, the place in computer simulation module
Reason program point two parts, a part of program is determined according to the temperature of collection using suitable refrigerating mode and by site setup
Executing agency control the opening and closing quantity of collector, to regulate and control the temperature of strip steel at inlet of coiling machine；Another part program is according to adopting
The temperature of collection come judge whether to need use edge-masking technique and device, if necessary to use edge-masking technique and device,
Temperature measuring equipment is then set after strip goes out cooling facility for laminar flow and temperature collecting device is set, for gathering strip after section cooling
The Temperature Distribution of plate in the width direction, exceedes if temperature acquisition result is the temperature difference with steel plate center and edge in the width direction
50 DEG C, then need to use edge-masking technique and device, to ensure strip in coiling machine porch along strip width direction center
It is less than 50 DEG C with the temperature difference of edge；Computer simulation module is mainly made up of software systems and database, wherein software systems
Main operating file is CLLQ.exe, and the form of document is Microsoft Excel files, after system starts, and institute is systematic
Function can realize that computer simulation block process and method mainly include on main menu：1), parameter setting function module,
2), structure property prediction, 3), target process optimization, 4), network data transmission, 5), These field control modules；1) parameter setting：
In software systems, parameter setting function module mainly includes parameter input, call parameters, does not preserve and exit, preserve and exit, again
Put, output result and the function that logs off；Parameter is inputted for inputting actual material constant and technological parameter and model
The calculating parameter to be used, after input parameter is selected, the parameter of input is divided into 4 different parameter groups by system, including：
A. the basis of steel and Fundamental Physical Properties parameter；B. laminar flow cooling technology parameter；C. material when finishing temperature and finish to gauge are completed
The microstructural parameter of material；D. cooling procedure structure property model prediction parameter；A. in the basis of steel and substantially physical
In energy input module, user input is mainly allowed about the main chemical compositions of material, the coefficient of heat conduction, the specific heat of material and heat exchange
Coefficient, and correlation curve is drawn, the basis and basic physical properties parameter setting of steel can be as needed, in systems to material
Chemical composition and various physical parameters modify, during modification double-click required for modification parameter cell, then input
Corresponding parameter, for the chemical composition inputting display interface of material, the CCT curve on the right side of double-click can then call new CCT
Double-clicked after the completion of the respective graphical file of curve, physical function parameter input and display interface for material, data modification right
The figure of side can update curve according to the data of input modification, in material coefficient of heat transfer display interface, click the figure on right side
Shape curve can change the content shown by curve；B. the setting of laminar flow cooling technology parameter：Laminar flow cooling technology parameter is set
Surely it is mainly used in the specification of the type of cooling, edge-masking amount and strip of user input section cooling, according to production scene
Technology arrangement, section cooling is divided into three-stage cooling, i.e. strong cooling section, slow cooling area, cold sperm area, can be cold by opening and closing
But the quantity of water pipe collector adjusts intensity of cooling, and according to production requirement, all types of cooling are programmed in journey by system
In sequence, user is selected by drop-down menu, after the completion of selection, can show each cooling on screen by graph direct
Duan Shuiguan open and-shut mode；Edge-masking amount is required according to user, sets the unobstructed edge-masking amount different with four, is used
Family can be selected as needed, and 4 edge-masking amounts determined by system have met the requirement of production, continue to increase side
Influence of portion's amount of blocking to product is little；C. the microstructural parameter of material when finishing temperature and finish to gauge are completed：Due to finish to gauge temperature
Degree directly influences the Temperature Distribution of follow-up cooling procedure, the crystallite dimension of austenite and the direct shadow of strain accumulation state after finish to gauge
Ring the dynamics of phase transformation, it is therefore desirable to which the reset condition before starting to section cooling is set, and the setting of reset condition includes
From the center of strip to the temperature distribution state of edge, remnants during finish to gauge in the crystallite dimension and austenite of austenite should
Become, wherein finishing temperature setting can according to scene process conditions and experience be inputted, and during finish to gauge austenite crystalline substance
Particle size and overstrain need to be simply calculated according to relevant materialogy model；D. cooling procedure structure property mould
Type forecast parameter：In laminar cooling process, the forecast of the development law of microstructure and the forecast of final products mechanical property,
It is the model set up according to materialogy principle, and forecast is realized for the correlation model parameters set by the characteristic of material
, the parameter of accuracy of the forecast and model specification is closely related, therefore when actually used, it is necessary to according to the situation at scene and
Technological equipment and technological parameter carry out appropriate adjustment to the parameter of model, and the system is by austenite in laminar cooling process
Microstructure evolution divide into different phase to carry out the setting of parameter, including before phase transformation overcooling austenite cooling procedure, mainly
The recrystallization grown up with austenite of austenite crystal, with the reduction of temperature, depending on phase transition temperature and critical cooling rate,
Austenite can all be set to ferritic transformation, perlitic transformation, bainite transformation and martensite transfor mation, model to each transformation
Corresponding transition kinetics parameter, to structure property relation, system calculates the volume fraction of each phase respectively according to mixing rule
And intensity, it is then combined with calculating yield strength, tensile strength and the elongation of material；
Parameter is saved in disk file after the completion of parameter setting, after selection is preserved, system will eject interface, allow user
Select data file preserve catalogue and filename, user in import file name, should not input file extension name, system will
Name the entitled mater and materA of extension automatically to file, wherein mater extension name file saves institute in binary form
Some parameters, and materA saves text information with text formatting,
If after parameter modification, the not corresponding parameter of want to save, selection " do not preserve and exit ", abandon to Parameter File
Modification,
" logging off " will close all systemic-functions, and withdraw from an organization performance prediction system,
2) structure property predictions
After the completion of parameter setting function module, carry out generating data library text after simple operation by computer simulation module
Part, by database manipulation, understands Temperature Distribution and the strip width direction in the cross-sectional width direction of the specification steel plate
Degree, yield strength, tensile strength and the elongation respectively organized after different laminar flow cooling technologies at each position,
TEMPERATURE FOR HOT STRIP LAMINAR cools tissue performance prediction computer software realizes the pre- of the Microstructural evolution of whole cooling procedure
Report, only the basic parameter and model parameter of material are being correctly entered in programming, could be realized correct forecast, moved back
When going out parameter setting function, system will provide a prompt window, inform according to current set parameter；
User checks cooling curve of each node in laminar cooling process along strip center to edge as needed
And instantaneous cooling rate, according to the cooling curve of each node, system is mutually carried out to the tissue composition of each node with mechanical property
Forecast,
3), target process optimizes
According to the requirement of user, target process optimization function is main excellent from target coiling temperature and target tensile strength progress
Change, for the optimization of target coiling temperature, first by network communication, desired target coiling temperature and strip are obtained from scene
The temperature difference requirement of center portion and edge,
Achieve after the target coiling temperature of requirement and the temperature difference requirement of center and edge, system is by first to all
Refrigerating mode carries out the optimization of target coiling temperature, and the refrigerating mode of target coiling temperature can be reached by finding, then in
The temperature difference of the heart and edge requires the optimization for carrying out blocking technique, finally gives corresponding laminar flow cooling technology parameter, tension is strong
Degree objective optimization is also the tensile strength for setting a target, then by the optimization processing to model, anti-after being optimized
Tensile strength；Similarly, yield strength, tensile strength and elongation after being optimized；
4), network data transmission：After the completion of target process optimization, system is transmitted by network data, by the optimization of determination
The control program of technique and edge-masking amount is sent to These field control modules by network transmission；
5), These field control modules：These field control modules control the collector of cooling facility for laminar flow to be opened and closed by executing agency
The edge-masking amount of amount and control edge-masking equipment, realizes online process setting, the optimization of target temperature and target capabilities
With the intellectuality of laminar cooling process and equipment, strong technical support is provided for exploitation high intensity Wide and Thick Slab.
A kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device, including be connected with each other and strip associated with each other, finishing mill
Group, roll rear temperature measuring equipment, roll temperature measuring equipment after rear temperature collecting device, cooling facility for laminar flow, cooling, cooling after temperature acquisition fill
Put, edge sheltering device, coiling machine；It is characterized in that：Also include computer simulation module：The simulation process of computer simulation module
Primary condition, d. are loaded by a. Geometric Modelings/gridding point, the parameter of b. definition materials, c. with process of setting up and load perimeter strip
Part, e. define loading sequence, f. and define operation, several parts compositions of g. post processings；A. Geometric Modeling/mesh generation：Due to strip
With symmetry, the 1/2 of strip width is taken to carry out mesh generation, according to the temperature distributing rule of strip cross section：Centre
Temperature higher than edge and middle part very big regional temperature all than more uniform, the general 200mm of edge zone temperature fluctuations are larger,
Therefore when mesh generation in the middle part of the spacing of mesh generation be 100mm, the mesh generation spacing of edge is 20mm；B. define
Material parameter：The coefficient of heat conduction of the beam steel measured will be tested, specific heat, density, Poisson's ratio parameter is loaded onto model；C. plus
Carry primary condition：Temperature distributing rule on the model set up on the loading of progress primary condition, different node locations is all
It is different, it is necessary to the Temperature Distribution of model is replaced with different colors after loading progressively, loading primary condition, every group of difference
Color represent different temperature；D. the loading of boundary condition：The synthetical surface heat transfer coefficient of the different materials obtained will be tested
The border of model is loaded into, the coefficient of heat transfer should be loaded onto the surface heat flow (face in the thermodynamics of material (thermal)
film)；E. loading sequence is defined：When loading sequence, interface is loaded into heat transfer, into transient changing option rather than
Stable state changes item, because the temperature of whole laminar cooling process constantly changes, subsequently into transient changing option, selection adds
The condition of load, loading primary condition, boundary condition also have the total time for inputting whole laminar cooling process, it is determined that whole cooling
The gathered data time interval of process；F. operation is defined：It is exactly that the model set up is carried out computing to define operation, needed for obtaining
The Temperature Distribution for the whole laminar cooling process wanted；G. post-process：Post processing simulation obtains whole laminar cooling process
Temperature, the temperature profile of node needed for then choosing, step is as follows：Into history drawing (history polt) option；Enter
Enter after history drawing option, click on selection node (set nodes), the node of analysis, then collects number required for therefrom selecting
According to (collect global date), the X-axis and Y-axis of institute's drawing shape are selected into drawing option (nodes/variables),
Finally draw, then the data of figure below are extracted, click on (copy to) and be copied directly in excel forms, last excel
The name of form is named in the way of section cooling, 110-1111000000-1313, is then saved in Microstructure Prediction software
Under data folder contents, so far, the simulation process of computer simulation module is completed with process of setting up.
The present invention operation principle be：Temperature Distribution and structure property distribution for plate width direction in wide plate production process
Uneven the problem of, proposing for innovation is calculated along plate width direction in laminar cooling process using finite element method analysis
Temperature-time changing rule.In FEM calculation, the coefficient of heat transfer in laminar cooling process is to carry out FEM calculation
Critical data.Strong cooling section in laminar cooling process, slow cooling area and cold sperm are tested using section cooling analogue means in the present invention
The coefficient of heat transfer in area, as the basic foundation of FEM calculation, according to the refrigerating mode (totally 27 kinds) of actual laminar cooling process,
Finishing temperature, strip specification, the temperature-time change curve for calculating corresponding cooling procedure first with finite element method are made
For master database.
The characteristics of this model is to be constituted first according to selected material, edge-masking condition, strip specification, finishing temperature
The subdirectory that database is present, is constituted database file name using section cooling mode, is carried out with this reading database file
Forecast.Temperature difference in the middle part of steel plate with edge, respectively 0mm edge-maskings and edge-masking are calculated according to section cooling mode
The temperature difference of steel plate center portion and edge in laminar cooling process during for 100mm, for production process technological design provide according to
According to.According to the temperature variation curve of FEM calculation, using corresponding Cooling Austenite Transformation model, analysis calculates whole layer
Flow the Microstructural evolution in cooling procedure.According to the product microstructure distribution finally given, pass through structure property relation meter
The mechanical property of product is calculated, the optimization for the mechanical property of product provides method.
The systemic-function provided using the present invention, it is possible to achieve properties of product and structure property uniformity are optimized
Function, so that realize that Product Process is designed, the work of new product development.The present invention is characterized in that in analyzing along the wide side of plate
To in the middle part of steel plate and edge temperature difference and the structure property difference that thereby results in, the production process for being particularly suitable for use in wide plate is auxiliary
Design is helped, meets the trend and demand of China's Plate Production.Structure property prediction system proposed by the present invention be not only one from
The expert system for setting and optimizing suitable for laminar cooling process technological parameter of line, and add in systems and network company
The setting of the online process parameter connect.Its basic structure is：(1) the target coiling temperature that is proposed according to user and along the wide side of plate
The basic demand for setting and optimizing as technique to the temperature difference of center and edge, be by what network data was sent to the present invention
System, it is first to the possible type of cooling according to the material of setting and reset condition parameter after system is successfully received above-mentioned data
First matched, it is determined that suitable refrigerating mode reaches target coiling temperature.Then, the suitable edge-masking work of reselection
Skill, to match the temperature difference at steel plate center and edge.After suitable refrigerating mode and edge-masking technique is determined, to tissue and
Performance is forecast, is transmitted eventually through network data, and the refrigerating mode of determination and edge-masking technique are sent into scene
Control module, and show the product performance index finally given.(2) if production scene is needed with the tensile strength of final products
As target performance requirement, then system of the invention provides and is sent to target tensile strength and center portion and side by network data
System is arrived in the intensity difference requirement in portion, after system is successfully received above-mentioned data, according to the material of setting and reset condition parameter,
Carry out pair analysis calculating first to the possible type of cooling, judge the tensile strength that various refrigerating modes can reach, so that
It is determined that the refrigerating mode selected.After refrigerating mode is determined, the suitable edge-masking technique of reselection, to match center and edge
Tensile strength it is poor.After suitable refrigerating mode and edge-masking technique is determined, transmitted by network data, by determination
Refrigerating mode and edge-masking technique are sent to the control module at scene, and show target coiling temperature and the middle part of corresponding technique
With the temperature difference of edge.Similarly, also can be by setting the work of target tensile strength, target yield strength, target product elongation percentage
Skill optimal way, the surrender of display steel plate steel plate centre and edge after selected laminar flow cooling technology cooling is strong
Degree is poor, tensile strength is poor and product elongation difference.
The beneficial effects of the invention are as follows：Contrast existing Controll theory, structure property prediction mould proposed by the present invention
The problem of type is proposed along cooling and the structure property skewness of strip plate width direction first first, and combine edge-masking
The quantitative analysis of technique, is conducive to instructing process design and the optimization of wide plate.Secondly, the present invention is transmitted by network data
Method, the technique of produced on-site is set and expert system is combined, the process optimization that production scene can be solved in real time is asked
Topic, there is significant Assistance And Instruction to act on to production process, and innovatively propose in laminar cooling process along band steel plate
The difference of strip Microstructural evolution and mechanical property, utilizes layer caused by the cooling velocity difference of cross direction center and edge
The rational refrigerating mode of cools tissue performance prediction Systematic selection and edge-masking technique are flowed, is optimized along strip plate width direction
The inhomogeneities of structure property, it is ensured that controlled after cooling along the temperature difference of strip width direction center and edge in 50 DEG C, really
The superior in quality and structure property for protecting strip is uniformly distributed.
Brief description of the drawings：
Fig. 1 is a kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device of the embodiment of the present invention and method flow diagram；
Fig. 2 is the computer program flow chart of the embodiment of the present invention；
Fig. 3 is embodiment of the present invention cooling facility for laminar flow technology arrangement sketch；
Fig. 4 is the distribution sketch of embodiment of the present invention cooling facility for laminar flow strong cooling section collector；
Fig. 5 is the distribution sketch that embodiment of the present invention cooling facility for laminar flow delays (essence) cold-zone collector；
Fig. 6 is the computer simulation sketch that embodiment of the present invention cooling facility for laminar flow collector is opened and closed pattern；
In accompanying drawing：1. mm finishing mill unit；2. strong cooling section；3. slow cooling area；4. cold sperm area；5. coiling machine；6. thermometric is filled after finish rolling
Put；7. temperature measuring equipment after section cooling.
Embodiment：
The embodiment of the present invention is discussed in detail below in conjunction with the accompanying drawings：A kind of TEMPERATURE FOR HOT STRIP LAMINAR of the embodiment of the present invention is cooled
Process control method is as shown in Figure 1-Figure 3：Specification is the parameter setting of 8mm × 1900mm beam steel, the specification steel grades
Input；The input of the specification steel grade coefficient of heat conduction；The input of the steel grade specific heat, the input of the coefficient of heat transfer, CCT curve it is defeated
Enter, go out the input of the Temperature Distribution of width cross section after mm finishing mill unit, the input of laminar flow cooling technology, laminar cooling process
The input of the kinetics equation of Austenite Grain Growth, section cooling in the input of middle edge-masking amount, laminar cooling process
During the critical cooling rate of ferritic transformation in the input of Size calculation formula of austenite crystal, laminar cooling process
Ferritic transformation dynamics side in the input of ferrite transformation temperature, laminar cooling process described in input, laminar cooling process
The input of the equation of ferritic crystallite dimension change described in the input of journey, laminar cooling process, determine laminar cooling process
In whether have the input of critical cooling rate, the section cooling mistake of generation that acicular ferrite changes and acicular ferrite transformation
The input of the critical cooling rate of journey medium pearlite transformation, the input of laminar cooling process medium pearlite transition temperature, laminar flow are cold
But the input of perlitic transformation kinetics equation during, pearlite piece interlamellar spacing equation is defeated described in laminar cooling process
Enter, the input of the critical cooling rate of bainite transformation in laminar cooling process, bainite transformation described in laminar cooling process
Described in the input of the equation of temperature, laminar cooling process in the input of bainite transformation kinetics equation, laminar cooling process
The input of Ms (martensite start) point, description cooling in the input of martensite transfor mation critical cooling rate, laminar cooling process
The input of the percentage of each composition afterwards；The input of the computing formula of intensity after description cooling；After parameters have been inputted
The forecast of structure property is carried out for selected section cooling scheme, by forecast it will be seen that the cross section of the specification steel plate is wide
Spend the percentage respectively organized after different laminar flow cooling technologies at the Temperature Distribution in direction and each position of width
Content, yield strength, tensile strength and elongation；Target process is optimized for the input of target coiling temperature；Steel plate center and side
The input of the temperature difference limit value in portion.The control program of the optimize technique of determination and edge-masking amount is passed by network data transmission
These field control modules are delivered to control the collector of cooling facility for laminar flow to be opened and closed pattern and the edge-masking amount of edge sheltering device.Such as
A kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device shown in Fig. 4-Fig. 6, mainly includes mm finishing mill unit device-section cooling dress
Put-temperature measuring equipment-temperature collecting device-computer simulation module-edge sheltering device-coiling machine：In embodiment one to implementation
In example four, cooling facility for laminar flow is divided into 3 parts according to the density degree of cooling zone collector, and 3 parts are respectively strong cooling section, delayed
Cold-zone and cold sperm area；Strong cooling section is made up of 3 groups of collectors, is 4.41m per group leader, is made up of 8 U-tubes, has 2 on every U-tube
Nozzle is arranged, nozzle horizontal spacing 48mm, longitudinal pitch 420mm, nozzle diameter 10mm, the distribution of strong cooling section collector is as shown in Figure 4；
Slow cooling area is made up of 10 groups of collectors, per group leader 3.78m, is made up of 4 U-tubes, there is 2 row's nozzles on every U-tube, and nozzle is horizontal
Spacing 48mm, longitudinal pitch 420mm, nozzle diameter 10mm, slow cooling area collector distribution are as shown in Figure 5；Cold sperm area is per group leader
3.78m, totally 2 groups, collector distribution is identical with slow cooling area；Mm finishing mill unit to the distance of the first group of collector center line in strong cooling section is 15m,
Cold sperm area to the distance of coiling machine is 12m.Specification for 8mm × 1900mm beam steel after mm finishing mill unit comes out, through temperature measurer
The Temperature Distribution in device measurement strip cross-sectional width direction, the temperature distributing rule of strip cross section：The temperature in centre is high
In edge, substantially 860 DEG C of the temperature of strip cross section.It is transversal that strip measures its after mm finishing mill unit comes out, through temperature measuring equipment
The Temperature Distribution of face width, the structure property prediction module by the Temperature Distribution measured by network transmission into computer
It is middle to be stored as primary condition；The laminar flow cooling technology mode of strip is stored in the storage device of computer；By the steel grade
Each composition, specific heat, the coefficient of heat transfer, CCT curve, austenite in edge-masking amount, laminar cooling process in laminar cooling process
Iron in the Size calculation formula of austenite crystal, laminar cooling process in kinetics equation that crystal grain is grown up, laminar cooling process
The parameters such as the critical cooling rate of ferritic transformation are input in the storage device of computer；The parameters stored are by calculating
Machine analog module is calculated, analyzed, and the data after calculating, analyzing then are passed through into network interface transfers to the control at scene again
In equipment, the section cooling equipment for scene is manipulated.
The related data of four embodiments of the present invention after field test is as follows：
Embodiment one：Specification is 1900mm × 8mm beam steel, and the temperature after finish rolling is 860 DEG C, and required coiling temperature is
620 DEG C, the speed of service in cooling procedure is 4.5m/s.The section cooling of the specification is determined after being simulated through MARC finite element softwares
Pattern is that (the collector opening and closing pattern in section cooling region, 3 groups of strong cooling section opens first 2 groups to 110-1111000000, and 10 groups of slow cooling area is opened
First 4 groups).Apply edge-masking technique during section cooling in slow cooling area, the amount of blocking is 0mm, the steel plate after cooling
Temperature is substantially in 620 DEG C or so of desired coiling temperature.Analog result is：Temperature in the middle of steel plate is 630 DEG C, the temperature of edge
For 574 DEG C.The temperature difference of width is 56 DEG C.
Embodiment two：Specification is 1900mm × 8mm beam steel, and the temperature after finish rolling is 860 DEG C, and required coiling temperature is
620 DEG C, the speed of service in cooling procedure is 4.5m/s.The section cooling of the specification is determined after being simulated through MARC finite element softwares
Pattern is that (the collector opening and closing pattern in section cooling region, 3 groups of strong cooling section opens first 2 groups to 110-1111000000, and 10 groups of slow cooling area is opened
First 4 groups).Apply edge-masking technique during section cooling in slow cooling area, the amount of blocking is 100mm, the steel plate after cooling
Temperature substantially in 620 DEG C or so of desired coiling temperature.Analog result is：Temperature in the middle of steel plate is 630 DEG C, the temperature of edge
Spend for 589 DEG C.The temperature difference of width is 41 DEG C.
Embodiment three：Specification is 1300mm × 5mm beam steel, and the temperature after finish rolling is 860 DEG C, and required coiling temperature is
620 DEG C, the speed of service in cooling procedure is 7m/s.The section cooling mould of the specification is determined after being simulated through MARC finite element softwares
Formula is that (the collector opening and closing pattern in section cooling region, 3 groups of strong cooling section opens first 2 groups, before 10 groups of slow cooling area is opened to 110-1111000000
4 groups).Apply edge-masking technique during section cooling in slow cooling area, the amount of blocking is 0mm, the temperature of the steel plate after cooling
Degree is substantially in 620 DEG C or so of desired coiling temperature.Analog result is：Temperature in the middle of steel plate is 630 DEG C, and the temperature of edge is
588℃.The temperature difference of width is 42 DEG C.
Example IV：Specification is 1300mm × 5mm beam steel, and the temperature after finish rolling is 860 DEG C, and required coiling temperature is
620 DEG C, the speed of service in cooling procedure is 7m/s.The section cooling mould of the specification is determined after being simulated through MARC finite element softwares
Formula is that (the collector opening and closing pattern in section cooling region, 3 groups of strong cooling section opens first 2 groups, before 10 groups of slow cooling area is opened to 110-1111000000
4 groups).Apply edge-masking technique during section cooling in slow cooling area, the amount of blocking is 100mm, the steel plate after cooling
Temperature is substantially in 620 DEG C or so of desired coiling temperature.Analog result is：Temperature in the middle of steel plate is 630 DEG C, the temperature of edge
For 599 DEG C.The temperature difference of width is 31 DEG C.
Four embodiment data can be drawn the following conclusions more than：Contrast existing TEMPERATURE FOR HOT STRIP LAMINAR cooling controlling party
Method and device, technical scheme solves cooling along strip plate width direction first and structure property is pockety
Problem, and the quantitative analysis of edge-masking technique is combined, optimize the production technology and design of generous strip, it is ensured that cooling
Controlled afterwards along the temperature difference of strip width direction center and edge in 50 DEG C, it is ensured that the superior in quality and structure property of strip
Be uniformly distributed.
Claims (2)
1. a kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control method, it is characterized in that：This method is mainly cooled down by TEMPERATURE FOR HOT STRIP LAMINAR
Control device process is constituted with computer simulation block process and method two parts, TEMPERATURE FOR HOT STRIP LAMINAR cooling controller
Process is：Strip measures strip steel plate width side when going out mm finishing mill unit after mm finishing mill unit is rolled by temperature measuring equipment
To Temperature Distribution, its measurement result is then gathered by temperature collecting device, the result of temperature survey is arrived by data transfer
Analyzed and processed in computer simulation module, the processing routine in computer simulation module point two parts, a part of program root
Determine to control the opening and closing of collector according to the temperature of collection using suitable refrigerating mode and by the executing agency of site setup
Quantity, to regulate and control the temperature of strip steel at inlet of coiling machine；Another part program judges whether to need to use according to the temperature of collection
Edge-masking technique and device, if necessary to use edge-masking technique and device, then set after strip goes out cooling facility for laminar flow
Put temperature measuring equipment and temperature collecting device is set, for gathering the Temperature Distribution after section cooling with steel plate in the width direction, such as
Fruit temperature acquisition result be the temperature difference with steel plate center and edge in the width direction more than 50 DEG C, then need to use edge-masking work
Skill and device, to ensure that the temperature difference of the strip in coiling machine porch along strip width direction center and edge is less than 50 DEG C；Calculate
Machine analog module is mainly made up of software systems and database, and wherein the main operating file of software systems is CLLQ.exe, document
Form be Microsoft Excel files, after system starts, the systematic function of institute can be realized on main menu, meter
Calculation machine analog module flow and method mainly include：1), parameter setting function module, 2), structure property prediction, 3), target work
Skill optimization, 4), network data transmission, 5), These field control modules；1) parameter setting：In software systems, parameter setting function mould
Block mainly include parameter input, call parameters, do not preserve exit, preserve and exit, reset, output result and the work(that logs off
Energy；Parameter is inputted for inputting actual material constant and the calculating parameter to be used of technological parameter and model, works as selection
After input parameter, the parameter of input is divided into 4 different parameter groups by system, including：A. the basis of steel and basic thing
Manage performance parameter；B. laminar flow cooling technology parameter；C. the microstructural parameter of material when finishing temperature and finish to gauge are completed；D. cool down
Process organization performance model forecast parameter；A. in the basis and Fundamental Physical Properties input module of steel, user is mainly allowed
The main chemical compositions about material, the coefficient of heat conduction, the specific heat and the coefficient of heat transfer of material are inputted, and draws correlation curve, steel
Basis and basic physical properties parameter setting can be as needed, in systems the chemical composition to material and various physical property ginseng
Number is modified, and the cell of the parameter of modification, then inputs corresponding parameter, for the change of material required for being double-clicked during modification
The respective graphical file of new CCT curve can then be called by studying the CCT curve on the right side of a point inputting display interface, double-click, for
Figure on the right side of being double-clicked after the completion of the physical function parameter input of material and display interface, data modification can be changed according to input
Data update curve, in material coefficient of heat transfer display interface, click right side graph curve can change shown by curve
Content；B. the setting of laminar flow cooling technology parameter：It is cold that the setting of laminar flow cooling technology parameter is mainly used in user input laminar flow
But the specification of the type of cooling, edge-masking amount and strip, according to the technology arrangement of production scene, section cooling is divided into three
Segmentation is cooled down, i.e. strong cooling section, slow cooling area, cold sperm area, can be cold to adjust by opening and closing the quantity of cooling water pipe collector
But intensity, according to production requirement, system writes all types of cooling in a program, and user is entered by drop-down menu
Row selection, after the completion of selection, can show the open and-shut mode of each cooling section water pipe by graph direct on screen；Edge-masking
Amount requires that set the unobstructed edge-masking amount different with four, user can be selected as needed, be according to user
4 edge-masking amounts determined by system have met the requirement of production, continue influence of the increase edge-masking amount to product little；
C. the microstructural parameter of material when finishing temperature and finish to gauge are completed：Because finishing temperature directly influences follow-up cooling procedure
The crystallite dimension of austenite and strain accumulation state directly affect the dynamics of phase transformation after Temperature Distribution, finish to gauge, it is therefore desirable to right
Reset condition before section cooling starts is set, and the setting of reset condition includes the temperature point from the center of strip to edge
Cloth situation, overstrain during finish to gauge in the crystallite dimension and austenite of austenite, the wherein setting of finishing temperature can roots
Inputted according to the process conditions and experience at scene, and the crystallite dimension of austenite and overstrain are needed according to relevant during finish to gauge
Materialogy model be simply calculated；D. cooling procedure structure property model prediction parameter：It is micro- in laminar cooling process
The forecast and the forecast of final products mechanical property of the development law of tissue are seen, is the mould set up according to materialogy principle
Type, and forecast is realized for the correlation model parameters set by the characteristic of material, accuracy of the forecast and model specification
Parameter is closely related, therefore when actually used, it is necessary to according to the situation and technological equipment and technological parameter at scene to model
Parameter carry out appropriate adjustment, the microstructure evolution of austenite in laminar cooling process divide into different phase to enter by the system
The setting of row parameter, including before phase transformation overcooling austenite cooling procedure, mainly austenite crystal grows up and austenite
Recrystallization, with the reduction of temperature, depending on phase transition temperature and critical cooling rate, austenite can be to ferritic transformation, pearly-lustre
Body changes, bainite transformation and martensite transfor mation, and model all sets corresponding transition kinetics parameter to each transformation, to group
Property relationship is knitted, system calculates the volume fraction and intensity of each phase respectively according to mixing rule, be then combined with calculating material
Yield strength, tensile strength and elongation；
Parameter is saved in disk file after the completion of parameter setting, after selection is preserved, system will eject interface, allow user to select
Data file preserve catalogue and filename, user in import file name, should not input file extension name, system will to text
Part names the entitled mater and materA of extension automatically, and wherein mater extension name file saves all in binary form
Parameter, and materA saves text information with text formatting,
If after parameter modification, the not corresponding parameter of want to save, selection " do not preserve and exit ", abandon repairing Parameter File
Change,
" logging off " will close all systemic-functions, and withdraw from an organization performance prediction system,
2) structure property predictions
After the completion of parameter setting function module, database file is generated after carrying out simple operation by computer simulation module, is led to
Database manipulation is crossed, the Temperature Distribution in the cross-sectional width direction of the specification steel plate and each position in strip width direction is understood
Degree, yield strength, tensile strength and elongation that the place of putting respectively is organized after different laminar flow cooling technologies, hot-rolled strip
Steel layer stream cools tissue performance prediction computer software realizes the forecast of the Microstructural evolution of whole cooling procedure, in journey
The basic parameter and model parameter of material only are being correctly entered in sequence design, correct forecast could be realized, parameter is being exited
When setting function, system will provide a prompt window, inform according to current set parameter；
User checks cooling curve and wink of each node in laminar cooling process along strip center to edge as needed
When cooling velocity, according to the cooling curve of each node, system to the tissue of each node composition mutually and mechanical property carried out it is pre-
Report,
3), target process optimizes
According to the requirement of user, target process optimization function is mainly optimized from target coiling temperature and target tensile strength,
For the optimization of target coiling temperature, first by network communication, desired target coiling temperature and the strip heart is obtained from scene
The temperature difference requirement of portion and edge,
Achieve after the target coiling temperature of requirement and the temperature difference requirement of center and edge, system is by first to all coolings
Pattern carry out target coiling temperature optimization, the refrigerating mode of target coiling temperature can be reached by finding, then according to center with
The temperature difference of edge requires the optimization for carrying out blocking technique, finally gives corresponding laminar flow cooling technology parameter, tensile strength mesh
Mark optimization is also the tensile strength for setting a target, and then by the optimization processing to model, the tension after being optimized is strong
Degree；Similarly, yield strength, tensile strength and elongation after being optimized；
4), network data transmission：After the completion of target process optimization, system is transmitted by network data, by the optimize technique of determination
These field control modules are sent to by network transmission with the control program of edge-masking amount；
5), These field control modules：These field control modules controlled by executing agency cooling facility for laminar flow collector opening and closing amount and
The edge-masking amount of edge-masking equipment is controlled, target temperature and online process setting, optimization and the layer of target capabilities is realized
The intellectuality of cooling procedure and equipment is flowed, strong technical support is provided for exploitation high intensity Wide and Thick Slab.
2. a kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling procedure control device, including be connected with each other and strip associated with each other, mm finishing mill unit,
Roll rear temperature measuring equipment, roll temperature measuring equipment after rear temperature collecting device, cooling facility for laminar flow, cooling, cooling after temperature collecting device,
Edge sheltering device, coiling machine；It is characterized in that：Also include computer simulation module：The simulation process of computer simulation module and
Set up process by a. Geometric Modelings/gridding point, the parameter of b. definition materials, c. load primary condition, d. boundary loading conditions,
E. loading sequence, f. are defined and defines operation, several parts compositions of g. post processings；A. Geometric Modeling/mesh generation：Because strip has
Symmetry, takes the 1/2 of strip width to carry out mesh generation, according to the temperature distributing rule of strip cross section：The temperature in centre
Degree is higher than edge and middle part very big regional temperature all than more uniform, and the general 200mm of edge zone temperature fluctuations are larger, therefore
The spacing of mesh generation in the middle part of when mesh generation is 100mm, and the mesh generation spacing of edge is 20mm；B. definition material
Parameter：The coefficient of heat conduction of the beam steel measured will be tested, specific heat, density, Poisson's ratio parameter is loaded onto model；C. load just
Beginning condition：The temperature distributing rule carried out on the model set up on the loading of primary condition, different node locations is all not
With, it is necessary to the Temperature Distribution of model is replaced with different colors after loading progressively, loading primary condition, every group of different face
Color represents different temperature；D. the loading of boundary condition：The synthetical surface heat transfer coefficient loading of the different materials obtained will be tested
To the border of model, the coefficient of heat transfer should be loaded onto the surface heat flow (face film) in the thermodynamics of material (thermal)；e.
Define loading sequence：When loading sequence, interface is loaded into heat transfer, is changed into transient changing option rather than stable state
, because the temperature of whole laminar cooling process constantly changes, subsequently into transient changing option, select the bar of loading
Part, loading primary condition, boundary condition also have the total time for inputting whole laminar cooling process, it is determined that whole cooling procedure
Gathered data time interval；F. operation is defined：It is exactly that the model set up is carried out computing to define operation, whole required for obtaining
The Temperature Distribution of individual laminar cooling process；G. post-process：Post processing is exactly the temperature that simulation obtains whole laminar cooling process, so
The temperature profile of node needed for choosing afterwards, step is as follows：Into history drawing (history polt) option；Painted into history
After figure option, selection node (set nodes) is clicked on, the node of analysis, then collects data required for therefrom selecting
(collect global date), the X-axis and Y-axis of institute's drawing shape is selected into drawing option (nodes/variables), most
Post-plot, then the data of figure below are extracted, click on (copy to) and be copied directly in excel forms, last excel tables
The name of lattice is named in the way of section cooling, 110-1111000000-1313, is then saved in Microstructure Prediction software
Under data folder contents, so far, the simulation process of computer simulation module is completed with process of setting up.
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