WO2016056129A1 - 材料特性値推定方法、材料特性値推定装置、および鋼帯の製造方法 - Google Patents
材料特性値推定方法、材料特性値推定装置、および鋼帯の製造方法 Download PDFInfo
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- WO2016056129A1 WO2016056129A1 PCT/JP2014/077225 JP2014077225W WO2016056129A1 WO 2016056129 A1 WO2016056129 A1 WO 2016056129A1 JP 2014077225 W JP2014077225 W JP 2014077225W WO 2016056129 A1 WO2016056129 A1 WO 2016056129A1
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- steel strip
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- material property
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
Definitions
- the present invention relates to a material property value estimation method and a material property value estimation device for estimating a material property value (material properties) of a steel strip, and a steel strip manufacturing method.
- Steel strip products manufactured through processes such as reheating process, forming process, and cooling process are coiled and delivered to customers, or to the next process for further processing Sent.
- Such steel strip products are subjected to quality judgment prior to delivery or the like in order to guarantee required quality (material characteristic values such as strength).
- quality judgment material characteristic values such as strength
- the quality of steel strip products is not stable at the end, the quality of the entire product is ensured by determining the cutting position from the result of quality judgment and cutting the end.
- thermoography a technique for measuring the temperature by photographing the whole area of a hot-rolled metal strip with a near-infrared camera (thermography) and judging the quality based on the measured temperature distribution.
- Patent Document 1 focuses on the correlation between the quality (material characteristic value) and the temperature of the hot-rolled metal strip and determines the quality using the temperature as an index.
- the influence of factors on quality cannot be taken into account, and the accuracy of quality judgment is insufficient.
- the cut-off position cannot be properly determined, and the defective part (the area where the material characteristic value is rejected) is left behind, or the part where the quality is good (the area where the material characteristic value is acceptable).
- the yield is lowered due to cutting off.
- the present invention has been made in view of the above, and an object of the present invention is to provide a material property value estimation method and a material property value estimation apparatus capable of accurately estimating a material property value of a steel strip. Moreover, the other object of this invention is to provide the manufacturing method of the steel strip which can suppress the fall of a yield.
- the material property value estimation method is a material of a target steel strip product manufactured through at least one of a heating process, a rolling process, and a cooling process performed while transporting the target material along the transport path.
- a material property value estimation method for estimating a property value wherein at least a measured value including a temperature of the target material measured at least once by a measuring device installed in the transport path and a component of the target steel strip product
- the method includes an estimation step of estimating a material property value for each mesh partitioning the target steel strip product based on a component value.
- the material characteristic value estimation device is a material of a target steel strip product manufactured through at least one of a heating process, a rolling process, and a cooling process performed while transporting the target material along a transport path.
- a material property value estimation device for estimating a property value, wherein the measured value including at least the temperature of the target material measured at least once by a measuring device installed in the transport path and each component of the target steel strip product
- An estimation means for estimating a material property value for each mesh dividing the inside of the target steel strip product based on the component value is provided.
- the steel strip manufacturing method is a steel manufactured through at least one of a heating process, a rolling process, and a cooling process performed while transporting the target material along the transport path.
- a method for manufacturing a strip based on a measured value including at least the temperature of the target material measured at least once by a measuring device installed in the transport path and a component value for each component of the steel strip, Estimating a material property value for each mesh partitioning the inside of the belt, and thresholding the estimated material property value for each mesh, the boundary position between the pass portion and the fail portion in the steel strip is determined. And a cutting step of cutting the steel strip at the determined boundary position.
- the steel strip manufacturing method is a steel manufactured through at least one of a heating process, a rolling process, and a cooling process performed while transporting the target material along the transport path. It is a manufacturing method of a strip, and is based on a measured value including at least a temperature of the target material measured at least once by a measuring device installed in the transport path and a component value for each component of the target steel strip product.
- the estimation step of estimating the material property value for each mesh partitioning the target steel strip product, and the difference between the estimated material property value for each mesh and the required specification of the material property value of the steel strip And a manufacturing condition determining step for changing one or more settings in the manufacturing conditions.
- the material property value of the steel strip can be estimated with high accuracy. Moreover, according to this invention, it can suppress that the yield of the manufacturing process of a steel strip falls.
- FIG. 1 is a schematic diagram illustrating an example of the overall configuration of a material property value estimation device and a manufacturing process to which the material property value estimation device is applied.
- FIG. 2 is a diagram illustrating a data configuration example of a performance database.
- FIG. 3 is a view showing a target steel strip product.
- FIG. 4 is a flowchart showing the processing procedure of the material property value estimation processing.
- FIG. 5 is a diagram illustrating an example of a material characteristic value image.
- FIG. 6 is a diagram showing an example of the relationship between the post-cooling temperature and the material characteristic value in a situation where the temperature during cooling is different.
- FIG. 7 is a diagram showing a temperature distribution (a) of the mid-cooling temperature, a temperature distribution (b) of the post-cooling temperature, and a material characteristic value image (c).
- FIG. 1 is a schematic diagram illustrating an example of the overall configuration of a material property value estimation device 1 according to the present embodiment and a manufacturing process 100 to which the material property value estimation device 1 is applied.
- the manufacturing process 100 includes a refining process 10, a casting process 11, a heating process 12, a rolling process 13 as a processing process, and a cooling process. 14 and an inspection step 15.
- the equipment for carrying out the heating step 12, the rolling step 13 and the cooling step 14 is an object material (slab) formed by laying transport rollers (table rolls) (not shown).
- the slab S11 or the rolled material S13 which is installed on the conveying path of S11 or the rolled material S13) and is sequentially conveyed in the conveying direction A1 on the conveying path, is heated, rolled, and cooled.
- the refining process 10 is a process in which the weight (component value (chemical composition)) of the component elements is appropriately adjusted and added to the liquid steel to obtain a steel having a predetermined composition.
- a component measuring meter 101 is installed, and a component value (actual value) for each adjusted steel component is measured.
- the measured component value for each component is output to the actual value collection device 5 described later as needed.
- the subsequent casting step 11 is a step in which the liquid steel adjusted to the above-mentioned predetermined composition is cooled and cast into a plate shape and cut into a predetermined length to form the slab S11.
- a thickness meter 111 is installed, and the thickness (slab thickness) of the slab S11 is measured.
- the measured slab thickness is output to the actual value collection device 5 as needed.
- the subsequent heating step 12 is a step of heating the slab S11 to around 1250 ° C. by the heating furnace 121.
- a thermometer 123 is installed on the exit side of the heating furnace 121, and the surface temperature (post-heating temperature) of the slab S11 at the completion of heating passing through the installation place is continuously measured. .
- the measured post-heating temperature is output to the actual value collection device 5 as needed.
- the subsequent rolling step 13 includes a plurality of rolling rolls 131 and 132, specifically, a rolling material (heated) by a rolling roll 131 constituting a roughing mill (roughers) and a rolling roll 132 constituting a finish rolling mill (finishers).
- This is a step of rolling S13 stepwise, and the slab thickness of about 250 mm is thinly extended to about 1 mm to 20 mm.
- a thickness / width meter 133 is installed as a dimension meter in the middle of rolling, for example, between a roughing mill and a finishing mill, and a thickness / width meter 135 is installed on the exit side of the finishing mill. Has been.
- the thickness (intermediate plate thickness) and width (intermediate width) of the rolled material S13 when passing through the installation place of the thickness / width gauge 133 and the installation place of the thickness / width gauge 135 are passed.
- the thickness (finished thickness) and width (finished width) of the rolled material S13 are continuously measured.
- a measuring roll 137 as a speedometer is installed in the middle of rolling such as between a roughing mill and a finishing mill, and the conveying speed of the rolled material S ⁇ b> 13 in the rolling process 13. (Conveying speed during rolling) is continuously measured.
- the measured intermediate plate thickness, finishing thickness, intermediate width, finishing width, and conveyance speed during rolling are output to the actual value collection device 5 as needed.
- the subsequent cooling step 14 is a step of supplying cooling water to the rolled material S13 that has been rolled by a plurality of cooling devices 141 and cooling it to several hundred degrees Celsius.
- a thermometer 143 is installed on the inlet side of the cooling device 141 on the most upstream side
- a thermometer 145 is installed in the middle of cooling between the cooling devices 141
- the cooling device 141 on the most downstream side is discharged.
- a thermometer 147 is installed on the side.
- the surface temperature of the rolled material S 13 that passes through the thermometer 143 temperature before cooling
- the surface temperature of the rolled material S 13 that passes through the thermometer 145 temperature during cooling
- the thermometer 147 is installed on the side.
- the surface temperature (post-cooling temperature) of the rolled material S13 passing through is continuously measured.
- the cooling process 14 is provided with a tachometer (not shown) as a speedometer at an appropriate position such as during the cooling, and the number of rotations of the transport roller is counted and converted into a speed.
- the conveyance speed (cooling conveyance speed) of the rolled material S13 is continuously measured.
- the measured pre-cooling temperature, mid-cooling temperature, post-cooling temperature, and conveyance speed during cooling are output to the actual value collection device 5 as needed.
- the steel strip product manufactured by completing the cooling step 14 as described above is wound up by a coil winder (not shown) to form a coil S15.
- the subsequent inspection step 15 is a step of conducting a tension test of a steel piece (test piece) S17 unwound from a steel strip product (coil) S15 and collected from an end portion or the like.
- the yield stress (Yield Strength) YS, the tensile strength (Tension Strength) TS, and the elongation (Elongation) EL of the steel slab S17 are measured by the instrument 151.
- Each value of the measured yield stress YS, tensile strength TS, and elongation EL is a material characteristic value (actual value), and is output to the actual value collecting device 5 as needed together with the sampling position of the steel piece S17 in the steel strip product S15.
- thermometers installed in the heating step 12 and the cooling step 14 are not limited to the number and location described above, and at least one unit is installed in each of the steps 12 and 14. That's fine.
- the number of installations and installation locations of the thickness / width gauges in the rolling process 13 are not limited to the above-described installations and installation locations, and at least one unit may be installed.
- the temperature of the rolled material S13 before cooling, during cooling in the cooling step 14, and at the completion of cooling (temperature before cooling, temperature during cooling, temperature after cooling) It is desirable to obtain all of Moreover, the rolling material processed in the process from the heating furnace 121 to the coiler S15 is not limited to only one as described above, and a plurality of rolling materials may be processed.
- the measurement of the temperature of the slab S11 or the rolled material S13 by the thermometers 123, 143, 145, and 147 is preferably performed over the entire width direction of the slab S11 or the rolled material S13 that passes through the installation place. The temperature may be measured for a part of the width direction.
- the thickness and width of the slab S11 or the rolled material S13 measured by the thickness gauge 111 and the thickness / width gauges 133 and 135 are measured in the entire width direction of the slab S11 or the rolled material S13 passing through the installation place. However, the thickness and width may be measured for a part of the width direction.
- the material property value estimation apparatus 1 applied to such a manufacturing process 100 includes an apparatus main body 2, an input device 3, a display device 4, an actual value collection device 5 as a collection unit, and an actual data storage unit.
- the record DB 6 is configured so as to be able to send and receive data via a bus line 50 that connects each part in the transmission bus 7 and the apparatus main body 2.
- the apparatus main body 2 is realized by using a general-purpose information processing apparatus such as a personal computer or a workstation, and includes an arithmetic processing unit 20, a ROM 30, and a RAM 40.
- the arithmetic processing unit 20 is realized by hardware such as a CPU.
- the arithmetic processing unit 20 is a material characteristic value estimation device based on programs and data stored in the ROM 30, operation signals input from the input device 3, various information acquired from the actual value collection device 5 and the actual result DB 6, and the like.
- the operation of the entire material property value estimation apparatus 1 is comprehensively controlled by giving instructions to each unit constituting the data, transferring data, and the like.
- the arithmetic processing unit 20 includes a manufacturing condition acquisition unit 21, a characteristic value estimation unit 23 as an estimation unit, a visualization unit 25 as a display processing unit, and a cut position determination unit as a determination unit as main functional units. 27.
- the ROM 30 stores a program for operating the material property value estimation device 1 and realizing various functions of the material property value estimation device 1, data used during the execution of these programs, and the like.
- the arithmetic processing unit 20 is caused to function as the manufacturing condition acquisition unit 21, the characteristic value estimation unit 23, the visualization unit 25, and the cut position determination unit 27 to estimate the material characteristic value of the steel strip product S15 and perform visualization.
- a characteristic value estimation program 31 is stored.
- the RAM 40 is a semiconductor memory used as a working memory for the arithmetic processing unit 20, and includes a memory area that temporarily stores programs executed by the arithmetic processing unit 20, data used during the execution, and the like.
- the input device 3 is realized by an input device such as a keyboard, a mouse, a touch panel, and various switches, and outputs an input signal corresponding to an operation input to the device body 2.
- the display device 4 is realized by a display device such as an LCD, an EL display, or a CRT display, and displays various screens based on display signals input from the device body 2.
- the actual value collection device 5 can be realized by a known hardware configuration including an arithmetic device such as a CPU, a main storage device, an auxiliary storage device such as a hard disk and various storage media, a communication device, a display device, and an input device.
- an arithmetic device such as a CPU
- main storage device such as a main storage device
- auxiliary storage device such as a hard disk and various storage media
- a communication device such as a facsable cellular communication device
- a display device such as a computer
- an input device for example, a general-purpose computer such as a server computer, a workstation, or a personal computer can be used.
- the actual value collecting device 5 includes a component measuring meter 101 in the refining process 10, a thickness gauge 111 in the casting process 11, a thermometer 123 in the heating process 12, a thickness / width gauge 133, 135 in the rolling process 13, and a measuring roll.
- the actual value collection device 5 has component values, slab thicknesses, intermediate thicknesses, finishing thicknesses, finishing widths, intermediate widths, finishing widths, and heating values measured by these measuring devices.
- Post temperature delivery temperature of reheating process
- pre-cooling temperature entity temperature of cooling process
- mid-cooling temperature temperature during cooling
- post-cooling temperature transport speed during heating, transport speed during rolling, transport speed during cooling
- material A measurement value of the characteristic value is collected, and a process (actual data registration process) of registering the actual data of the steel strip product S15 sequentially manufactured in the manufacturing process 100 in the actual result DB 6 based on the collected measured value is performed.
- the performance DB 6 is a database (DB) that accumulates performance data of steel strip products manufactured in the past in the manufacturing process 100, and registers and updates the performance data every time the steel strip product S15 is manufactured in the manufacturing process 100. It is built by going (save step).
- FIG. 2 is a diagram illustrating a data configuration example of the performance DB 6. Each actual data is set as a measured value collected by the actual value collecting device 5 or a presumed value estimated based on these measured values, based on a predetermined manufacturing condition value or material characteristic value. Specifically, as shown in FIG. 2, each performance data includes a manufacturing condition 65 and a material characteristic value 67 associated with a combination of product No 61 and mesh No 63.
- the product No. 61 is an identification number for identifying the steel strip product, and the mesh No. 63 represents a position in the corresponding steel strip product that is a target of measurement of the corresponding measurement value or the like (FIG. 3 described later). See).
- the manufacturing condition 65 includes values for each manufacturing condition item, and includes a component value 651, a thickness / width history 653, a temperature history 655, and a speed history 657 in the present embodiment.
- the component value 651 the measured values of the component values for each component are set as component 1, component 2,.
- the kind of component changes with steel strip products as a typical thing, carbon (C), manganese (Mn), silicon (Si), aluminum (Al) etc. are mentioned, for example.
- C carbon
- Mn manganese
- Si silicon
- Al aluminum
- measured values such as slab thickness, intermediate plate thickness, finish thickness are set as thickness 1, thickness 2,... It is set as.
- measured values or estimated values such as a post-heating temperature, a pre-cooling temperature, a mid-cooling temperature, and a post-cooling temperature are set as temperature 1, temperature 2,.
- measured values such as a heating conveyance speed, a rolling conveyance speed, and a cooling conveyance speed are set as speed 1, speed 2, and so on.
- the measured value or estimated value is set as the material property value.
- the result value collecting device 5 includes the processes 10 to 14 in the manufacturing process from the start of the manufacture of the steel strip product (target steel strip product) to be manufactured this time until the end of the manufacture. Measurement values that are measured at any time by other measuring instruments are collected (collection step).
- FIG. 3 is a diagram showing the target steel strip product S2 that has been manufactured.
- the entire length is a length corresponding to the winding amount
- the thickness is the finished thickness
- the width is the finished width.
- the length direction of the target steel strip product S2 is defined as the X direction
- the thickness direction is defined as the Y direction
- the width direction is defined as the Z direction.
- the measurement values obtained by the measuring devices in the respective processes 12 to 14 are tracked at the measurement positions. get.
- a measuring position tracking means a method of specifying a measuring position based on the number of times of walking beam transporting the target material in the heating furnace in the heating step 12, and a measuring position is detected using ⁇ rays in the rolling step 13. Examples thereof include a method, a method of estimating the measurement position based on the number of rotations of the rolling mill in the rolling step 13, and a method of estimating the measurement position by counting the number of rotations of the coil winder in the cooling step 14. .
- the intermediate plate thickness, finish thickness, intermediate width, finish width, post-heating temperature, pre-cooling temperature, mid-cooling temperature, post-cooling temperature, transport speed during heating, and transport speed during rolling are measured in each step 12-14.
- the measured value of the conveyance speed at the time of cooling will be finally collected for every measurement position corresponding to each mesh of the mesh-like uppermost layer shown, for example in FIG.
- the width of the mesh in the X direction corresponds to the measurement cycle of the measuring device in each step 12-14.
- the result value collection device 5 partitions the target steel strip product S2 in the Y direction as shown in FIG. 3 and assigns unique mesh numbers to all meshes.
- mesh numbers assigned to some meshes are illustrated.
- the size of the mesh is not particularly limited, and may be a size according to the above-described measurement cycle. For example, each direction of X, Y, and Z is partitioned with a width in the range of several tens of ⁇ m to several m. It is made the size.
- the mesh No. is assigned as a character string obtained by combining the layer number and the serial number of each mesh, with an underscore “_” in between.
- the layer number is for specifying the layer position of each mesh.
- FIG. 3 shows a four-layer mesh in which the Y direction is divided into four, and the layer numbers are “P1”, “P2”, “P3”, and “P4” in order from the top layer. In addition, it is not necessary to divide about the Y direction, and when the finishing thickness of object steel strip product is small, it is good also considering a mesh as one layer.
- the result value collecting device 5 associates the value of the manufacturing condition item including the measurement value by the measuring device in each of the processes 12 to 14 for each mesh partitioning the target steel strip product S2 as described above. Data is registered in the result DB 6.
- the component value for every component among the values of the manufacturing condition item of each mesh shall be the measured value which the component measuring instrument 101 measured uniformly, for example.
- a measurement value measured by the thickness gauge 111 with all meshes is used.
- the values of the hourly conveying speed and the coolingly conveying speed are the measured values of the corresponding measurement positions acquired while tracking as described above.
- these values in the lower layer mesh whose layer numbers are “P2”, “P3”, and “P4” are the same values as the measured values of each mesh in the uppermost layer or estimated values estimated from the measured values.
- the measured value of the mesh For the values of the temperature after heating, the temperature before cooling, the temperature during cooling, and the temperature after cooling, for example, using a heat transfer model determined in advance based on the measured value of each mesh of the uppermost layer, A process of estimating each value of the post-heating temperature, the pre-cooling temperature, the mid-cooling temperature, and the post-cooling temperature at each mesh position is performed, and the obtained estimated value is obtained.
- the material property value is estimated in the material property value estimation process described later (step a11 in FIG. 4) or is measured in the subsequent inspection step 15, and thus no value is set here.
- FIG. 4 is a flowchart showing the processing procedure of the material characteristic value estimation process performed by the arithmetic processing unit 20 in the apparatus main body 2.
- the result value collection device 5 performs the result data registration process described above, and the arithmetic processing unit 20 performs the material property value estimation process according to the processing procedure of FIG. To do.
- the material property value estimation process can be realized by the arithmetic processing unit 20 reading and executing the property value estimation program 31 stored in the ROM 30. This material characteristic value estimation process is started when the coil winder starts winding the target steel strip product.
- the arithmetic processing unit 20 determines whether or not there is a mesh that has been manufactured by being newly wound by the coil winder. And when there exists the mesh which finished manufacture, ie, every time the width
- the meshes are sequentially set as target meshes, and the process of loop A is executed (step a3 to step a13).
- the steel strip product manufactured in the manufacturing process 100 is as long as about 1000 m in total length, it is wound up by the coil winder from the front end side where the manufacturing is finished (completed until the cooling process 14). For a while after starting the winding by the coil winder, there will be a mixture of a part that has been manufactured and wound as a coil and a part that is in the middle of manufacturing (until the cooling step 14 is not completed).
- the rightmost 16 meshes are sequentially set as the target mesh.
- the loop A process is performed for each of these 16 meshes.
- the manufacturing condition acquisition unit 21 performs the target mesh result data (hereinafter, “target result data”) from the result DB 6 based on the product No. of the target steel strip product and the mesh No. of the target mesh. Is read and acquired (step a5).
- target result data the target mesh result data from the result DB 6 based on the product No. of the target steel strip product and the mesh No. of the target mesh.
- the characteristic value estimation unit 23 performs the processing of step a7 to step a11 to estimate the material characteristic value of the target mesh (estimation step). That is, the characteristic value estimation unit 23 first sequentially reads the performance data for each mesh (hereinafter referred to as “past performance data”) related to the steel strip product manufactured in the past from the performance DB 6 and is acquired in step a5. The similarity between the target performance data and each of the past performance data is calculated by comparing values with the performance data for each manufacturing condition item (step a7). For example, the characteristic value estimation unit 23 sequentially calculates the sum of squares of the value difference for each manufacturing condition item between the target performance data and the past performance data as the similarity to the corresponding past performance data according to the following equation (1).
- the similarity is set to a value that is higher for past performance data in which the value for each manufacturing condition item is similar to the target performance data as a whole, and the manufacturing conditions are similar to the target mesh, and is lower for other past performance data. Calculated.
- the similarity calculation formula shown in the above formula (1) is an example, and is not limited to this. That is, the similarity calculation formula only needs to be such that the past performance data whose manufacturing conditions are similar to the target mesh have a larger numerical value.
- the degree of similarity with the target performance data is calculated for all past performance data registered in the performance DB 6.
- the result data of the same mesh No. may be selected, and the similarity may be calculated for the selected result data.
- a material characteristic value can be estimated by searching for a material having a high degree of similarity among the manufacturing conditions of the same layer.
- the characteristic value estimation unit 23 searches the past performance data having the minimum similarity from the past performance data based on the similarity calculated in step a7 (step a9). Then, the characteristic value estimation unit 23 estimates the material characteristic value of the target mesh as the material characteristic value of the retrieved past performance data, and updates the performance data of the target mesh (step a11). Thereafter, the process of Loop A for the target mesh is terminated.
- the material characteristic value estimation device 1 functions as a registration unit by the processing here and the above-described performance data registration processing.
- the inspection step 15 after the cooling step 14 a steel slab is collected from the manufactured steel strip product, the material property value is measured, and the measured value is output to the actual value collecting device 5.
- the actual value collection device 5 updates the material property value of the mesh to which the steel piece sampling position belongs with the measured value.
- the method used for estimating the material property value of the target mesh is not limited to the method using the above-described similarity.
- the material property value of the target mesh may be estimated from the past performance data using another method such as a regression method or an interpolation method (interpolation method).
- the visualization unit 25 When the coil winder finishes winding the target steel strip product and executes the processing of loop A for all meshes (step a15: Yes), the visualization unit 25 then continues the process within the target steel strip product. Processing for generating a material characteristic value image representing the distribution state of the material characteristic value for each layer of the mesh and displaying it on the display device 4 is performed (step a17). For example, the visualization unit 25 reads out the material property value of each mesh of the target steel strip product from the result DB 6 for each layer, and isometric view for each layer in which meshes having the same material property value value are represented in the same color ( A contour graph is generated and displayed as a material characteristic value image.
- FIG. 5 is a diagram showing an example of a material property value image, where the horizontal direction is the length direction of the target steel strip product and the vertical direction is the width direction of the target steel strip product, and the uppermost layer is “P1”.
- the material characteristic value image of is shown.
- step a17 of FIG. 4 the material characteristic value images of the respective layers representing the distribution state of the material characteristic values in the target steel strip product as shown in FIG. 5 are displayed side by side on the display device 4, or according to an operation input by the operator.
- the material property value image of one layer is selectively displayed and presented to the operator.
- the cutting position determination unit 27 determines the cutting position of the target steel strip product (step a19). Specifically, the cutting position determination unit 27 first performs threshold processing on the material property value of each mesh of the target steel strip product using the allowable value of the material property value determined according to the quality required in advance as a threshold value. Then, a pass portion and a fail portion where the material characteristic value is equal to or greater than the threshold value are determined. Then, the cutoff position determination unit 27 determines the boundary between the determined acceptable part and the rejected part as the cutoff position. The cut position determination unit 27 transmits information on the determined cut position to the steel strip cutting device 152 in the inspection process 15.
- the steel strip cutting device 152 unwinds the steel strip installed in the uncoiler 153 to the position where it is cut off by the uncoiler 153.
- the steel strip cutting device 152 then cuts the steel strip at the cut-off position by transmitting a cutting command command to the cutter 154.
- the manufacturing condition determination unit 28 determines the manufacturing condition of the steel strip product to be manufactured next to the target steel strip product (step a20, manufacturing condition determination step). Specifically, the manufacturing condition determination unit 28 uses the characteristic value estimation unit 23 as a back calculation unit so as to calculate the manufacturing condition from the given material characteristic value, so that the material characteristic value matches the required specification. The condition is calculated, and the difference between the calculated manufacturing condition and the set manufacturing condition is added to the manufacturing condition as a setting correction term for the manufacturing condition of the steel strip product to be manufactured next. For example, when the coiling temperature is one of the manufacturing conditions in the cooling process and the coiling temperature in the representative mesh with the steel strip is 550 ° C., the manufacturing condition determining unit 28 sets the coiling temperature to 500 ° C. , 525 ° C, 550 ° C, 575 ° C, and 600 ° C, the material property values are estimated for five types of steel strip products having new manufacturing conditions. In addition, the value of winding temperature may be another value.
- the manufacturing condition determining unit 28 takes up the winding closest to the required specification.
- the production conditions at a temperature of 525 ° C. are selected.
- the setting of the coiling temperature of the steel strip product to be manufactured next is 560 ° C.
- the present embodiment as a specific configuration method of the back-calculation calculation method, a method of searching for a material property value closest to the required specification from a plurality of manufacturing conditions in the vicinity of the manufacturing conditions has been described, but the method is practically limited to this method. There is nothing.
- FIG. 6 is a diagram showing an example of the relationship between the post-cooling temperature and the material characteristic value when the temperatures during cooling are different values T M1 , T M3 , and T M5 .
- the temperature during cooling T M3
- FIG. 7 is a diagram showing a material property value image of the steel strip product obtained by the material property value estimation process.
- FIG. 7 (b) the boundary (cut-off position) L31 and L33 of the acceptance part in a steel strip product and the rejection part which were determined according to the quality determination result of the above-mentioned material characteristic value which uses temperature after cooling as a parameter
- FIG. 7C shows cut-off positions L35 and L37 obtained by the material characteristic value estimation process.
- the end portions including the acceptable portions R31 and R33 having good material property values are cut off, resulting in a decrease in yield.
- the material characteristic value may be cut off leaving a rejected part with a defect. In this case, the required quality cannot be ensured.
- the measurement values are collected using the factors affecting the material property values as described above as manufacturing condition items, and the material property values are obtained using the collected measurement values and the estimated values estimated from the measurement values. It was decided to estimate. Specifically, in this embodiment, the component value, slab thickness, intermediate plate thickness, finish thickness, intermediate width, finish width, post-heating temperature, pre-cooling temperature, mid-cooling temperature, and post-cooling temperature for each component are set. It was decided to be a manufacturing condition item. According to this, the material characteristic value of the steel strip product can be accurately estimated over the entire area.
- the measurement value obtained by the measuring device in the heating process 12, the rolling process 13 and the cooling process 14 performed while conveying the target material is acquired while tracking the measurement position. It was decided to. Then, the material characteristic value is estimated for each mesh corresponding to the measurement position of the measurement value in each of the steps 12 to 14. Therefore, it is possible to appropriately determine the cut-off position of the steel strip product by thresholding the estimated material property value and discriminating the acceptable portion and the rejected portion in the steel strip product. According to this, it is possible to reduce the decrease in yield while ensuring the required quality.
- the production condition of the steel strip product to be produced next to the target steel strip product Correct based on the difference between the material property value of the steel strip product and the material property value defined in the required specifications, the production condition of the steel strip product to be produced next to the target steel strip product Correct. Therefore, it can correct
- the present invention it is possible to provide a material property value estimation method and a material property value estimation device that can accurately estimate a material property value of a steel strip. Moreover, according to this invention, the manufacturing method of the steel strip which can suppress the fall of a yield can be provided.
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Abstract
Description
10 精錬工程
101 成分計測計
11 鋳造工程
111 厚み計
12 加熱工程
123 温度計
13 圧延工程
133,135 厚み・幅計
137 メジャーリングロール
14 冷却工程
143,145,147 温度計
15 検査工程
151 試験器
1 材料特性値推定装置
2 装置本体
20 演算処理部
21 製造条件取得部
23 特性値推定部
25 可視化部
27 切落位置決定部
30 ROM
31 特性値推定プログラム
40 RAM
50 バス配線
3 入力装置
4 表示装置
5 実績値収集装置
6 実績DB
7 伝送バス
Claims (11)
- 対象材を搬送経路に沿って搬送しながら行う加熱工程、圧延工程、および冷却工程のうちの少なくとも1つの工程を経て製造された対象鋼帯製品の材料特性値を推定する材料特性値推定方法であって、
前記搬送経路に設置された計測機器により1回以上計測された少なくとも前記対象材の温度を含む計測値と前記対象鋼帯製品の成分毎の成分値とに基づいて、前記対象鋼帯製品内を区画するメッシュ毎の材料特性値を推定する推定ステップを含むことを特徴とする材料特性値推定方法。 - 過去に製造された鋼帯製品の成分毎の成分値およびその製造過程で収集した前記計測機器による計測値を含む製造条件項目の値と材料特性値とを該当する鋼帯製品内を区画するメッシュ毎に関連付けて実績データとして保存する保存ステップと、
前記対象鋼帯製品の製造過程において、前記計測機器による計測値をその計測位置をトラッキングしながら取得することで前記対象鋼帯製品内を区画するメッシュ毎に前記計測値を収集する収集ステップと、を含み、
前記推定ステップは、前記対象鋼帯製品の成分毎の成分値と前記収集したメッシュ毎の計測値とを前記対象鋼帯製品に関する製造条件項目の値とし、前記実績データを用いて前記対象鋼帯製品に関する製造条件項目の値に対応する材料特性値を前記メッシュ毎に推定するステップを含むことを特徴とする請求項1に記載の材料特性値推定方法。 - 前記推定ステップは、前記対象鋼帯製品に関する製造条件項目の値と過去に製造された鋼帯製品に関する製造条件項目の値との類似度を前記メッシュ毎に算出し、各メッシュの材料特性値を最も類似度の高い製造条件項目の値に対応する材料特性値として推定することを特徴とする請求項2に記載の材料特性値推定方法。
- 前記推定した前記メッシュ毎の材料特性値をもとに前記対象鋼帯製品内の前記材料特性値の分布状態を表した特性値分布画像を生成し、表示装置に表示する表示処理ステップを含むことを特徴とする請求項1~3のいずれか1つに記載の材料特性値推定方法。
- 前記推定した前記メッシュ毎の材料特性値を閾値処理することで、所定用途に使用可能か否かを判別可能に出力する判別情報出力ステップを含むことを特徴とする請求項1~4のいずれか1つに記載の材料特性値推定方法。
- 前記計測値は、寸法計により計測された前記圧延工程内での対象材または対象鋼帯の厚み、または、温度計により計測された前記冷却工程での鋼帯の温度の計測値を含むことを特徴とする請求項1~5のいずれか1つに記載の材料特性値推定方法。
- 対象材を搬送経路に沿って搬送しながら行う加熱工程、圧延工程、および冷却工程のうちの少なくとも1つの工程を経て製造された対象鋼帯製品の材料特性値を推定する材料特性値推定装置であって、
前記搬送経路に設置された計測機器により1回以上計測された少なくとも前記対象材の温度を含む計測値と前記対象鋼帯製品の成分毎の成分値とに基づいて、前記対象鋼帯製品内を区画するメッシュ毎の材料特性値を推定する推定手段を備えることを特徴とする材料特性値推定装置。 - 対象材を搬送経路に沿って搬送しながら行う加熱工程、圧延工程、および冷却工程のうちの少なくとも1つの工程を経て製造される鋼帯の製造方法であって、
前記搬送経路に設置された計測機器により1回以上計測された少なくとも前記対象材の温度を含む計測値と前記鋼帯の成分毎の成分値とに基づいて、鋼帯内を区画するメッシュ毎の材料特性値を推定する推定ステップと、
前記推定した前記メッシュ毎の材料特性値を閾値処理することで前記鋼帯内の合格部分と不合格部分との境界位置を決定し、決定した境界位置で鋼帯を切断する切断ステップと、
を含むことを特徴とする鋼帯の製造方法。 - 対象材を搬送経路に沿って搬送しながら行う加熱工程、圧延工程、および冷却工程のうちの少なくとも1つの工程を経て製造される鋼帯の製造方法であって、
前記搬送経路に設置された計測機器により1回以上計測された少なくとも前記対象材の温度を含む計測値と前記対象鋼帯製品の成分毎の成分値とに基づいて、前記対象鋼帯製品内を区画するメッシュ毎の材料特性値を推定する推定ステップと、
前記推定された前記メッシュ毎の材料特性値と材料特性値の要求仕様との差に基づいて
鋼帯の製造条件の中の1つ又は複数の設定を変更する製造条件決定ステップと、
を含むことを特徴とする鋼帯の製造方法。 - 過去に製造された鋼帯製品の成分毎の成分値およびその製造過程で収集した前記計測機器による計測値を含む製造条件項目の値と材料特性値とを該当する鋼帯製品内を区画するメッシュ毎に関連付けて実績データとして保存する保存ステップと、
前記対象鋼帯製品の製造過程において、前記計測機器による計測値をその計測位置をトラッキングしながら取得することで前記対象鋼帯製品内を区画するメッシュ毎に前記計測値を収集する収集ステップと、を含み、
前記推定ステップは、前記対象鋼帯製品の成分毎の成分値と前記収集したメッシュ毎の計測値とを前記対象鋼帯製品に関する製造条件項目の値とし、前記実績データを用いて前記対象鋼帯製品に関する製造条件項目の値に対応する材料特性値を前記メッシュ毎に推定するステップを含むことを特徴とする請求項9に記載の鋼帯の製造方法。 - 前記計測値は、寸法計により計測された前記圧延工程内での対象材または対象鋼帯の厚み、または、温度計により計測された前記冷却工程での鋼帯の温度の計測値を含むことを特徴とする請求項9または請求項10に記載の鋼帯の製造方法。
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JP2022515094A (ja) * | 2018-12-18 | 2022-02-17 | アルセロールミタル | 中間金属製品のグループからの最終金属製品のグループの製造を制御するための方法および電子デバイス、関連するコンピュータプログラム、製造方法および設備 |
JP7301968B2 (ja) | 2018-12-18 | 2023-07-03 | アルセロールミタル | 中間金属製品のグループからの最終金属製品のグループの製造を制御するための方法および電子デバイス、関連するコンピュータプログラム、製造方法および設備 |
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EP3205418A1 (en) | 2017-08-16 |
US20170297072A1 (en) | 2017-10-19 |
EP3205418A4 (en) | 2018-05-30 |
CN106794499A (zh) | 2017-05-31 |
CN106794499B (zh) | 2018-10-12 |
KR20170049587A (ko) | 2017-05-10 |
KR101897022B1 (ko) | 2018-09-10 |
JPWO2016056129A1 (ja) | 2017-04-27 |
US10843247B2 (en) | 2020-11-24 |
JP6086155B2 (ja) | 2017-03-01 |
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