WO2022139281A1 - 교정용 강판, 교정이 가능한 전자기 검사 장치 및 교정용 강판의 제조 방법 - Google Patents
교정용 강판, 교정이 가능한 전자기 검사 장치 및 교정용 강판의 제조 방법 Download PDFInfo
- Publication number
- WO2022139281A1 WO2022139281A1 PCT/KR2021/018740 KR2021018740W WO2022139281A1 WO 2022139281 A1 WO2022139281 A1 WO 2022139281A1 KR 2021018740 W KR2021018740 W KR 2021018740W WO 2022139281 A1 WO2022139281 A1 WO 2022139281A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- calibration
- steel sheet
- hardness
- steel plate
- electromagnetic
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 157
- 239000010959 steel Substances 0.000 title claims abstract description 157
- 238000007689 inspection Methods 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 27
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000012937 correction Methods 0.000 title abstract description 8
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000007542 hardness measurement Methods 0.000 abstract description 4
- 235000019589 hardness Nutrition 0.000 description 77
- 230000007547 defect Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229910001563 bainite Inorganic materials 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
-
- 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
-
- 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
- B21C51/005—Marking devices
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/80—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9093—Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- 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
- C21D2221/00—Treating localised areas of an article
Definitions
- the present invention relates to a steel plate for calibration and an inspection device used for sensor calibration, and a method for manufacturing the steel plate for calibration.
- a general method of measuring hardness is widely used as a destructive method of measuring the strength of hardness according to its shape by applying a force with a specific load to the surface of an object to be measured.
- This method is a method of calculating the hardness value by measuring the shape of the section to be destroyed.
- the length is several meters to tens of meters and the width is about several meters. There is a problem.
- Patent Literature 1 or Patent Literature 2 a technology for measuring the characteristics of a steel plate by generating an eddy current through a coil to which an AC power is applied without contact has been developed. The problem is that it can't be done.
- Patent Document 2 an eddy current is generated in the steel plate through a coil to which AC power is applied and a sensor that measures the characteristics of the steel plate is used while calibrating the sensitivity with the calibration steel plate installed.
- a test piece is inserted or an artificial defect caused by an arc strike is disclosed, but in the case of such a steel plate for correction, there is a problem in that it is insufficient to correct the precise sensitivity.
- Patent Document 1 JP 2000-227421 A
- Patent Document 2 JP 2019-042807 A
- the present invention is to solve the problems of the prior art as described above, a steel plate for calibration for quickly and accurately calibrating the sensitivity of a sensor in hardness measurement without a sudden signal change, an inspection device including the same, and a method for manufacturing a steel plate for calibration is intended to provide
- the present invention provides a steel sheet for calibration as follows, an inspection apparatus including the same, and a method for manufacturing a steel sheet for calibration.
- the present invention in one embodiment, has a long side and a short side, and is a steel plate used for calibration of a sensor, comprising a first part having a first hardness and a second part having a second hardness higher than the first hardness, The first part and the second part are disposed at different positions in the short side direction, and the first part and the second part provide a sensor calibration steel sheet having a transformed phase from austenite grains of the same composition.
- the second part may have a hardness 50Hv or more higher than that of the first part, and the first part and the second part may be formed to extend in a long side direction.
- the second portion may have a hardness of 250Hv or more.
- it includes a third portion having the third hardness, wherein the third hardness is greater than the first hardness and less than the second hardness, and the third portion includes first and second hardness in a short side direction. It is disposed at a position different from the second part, and the third part may provide a sensor calibration steel sheet having a transformed phase in austenite grains.
- the present invention a sensor body including a plurality of electromagnetic sensors disposed in the width direction of the steel plate to be measured; a moving means connected to the sensor body and moving the sensor body; and a steel plate for sensor calibration disposed at a different position from the steel plate to be measured, wherein the steel plate for sensor calibration is the above-described steel plate for sensor calibration, and the steel plate for sensor calibration is the same as the steel plate to be measured. It has a material and a width, and the moving means on the steel plate for sensor calibration can provide an electromagnetic inspection device capable of calibration that is configured to have a moving distance greater than or equal to the width of the steel plate for calibration.
- a calibration unit connected to the plurality of electromagnetic sensors, the calibration unit on the basis of the measurement value measured in the first portion and the second portion in the plurality of electromagnetic sensors based on the measurement value
- a plurality of electromagnetic sensors can be calibrated.
- the calibration unit may perform calibration by converting the measured value measured by the electromagnetic sensor into hardness, and converting the measured value to be the same as the hardness of the measured portion.
- the steel plate to be measured and the steel plate for sensor calibration may have the same length and thickness.
- the measurement area in which the steel plate to be measured is disposed and the calibration area in which the steel plate for sensor calibration is disposed may be arranged side by side.
- the present invention in one embodiment, as a method of manufacturing a steel sheet for sensor calibration, a heating step of heating the steel sheet in a heating furnace; a rolling step of rolling the heated steel sheet with a rolling roll; and a cooling step of cooling the rolled steel sheet, wherein in the cooling step, the steel sheet includes a first portion and a second portion at different positions along the width direction of the steel sheet, and the first portion and the second portion Provided is a method of manufacturing a steel sheet for straightening with different cooling rates.
- the adjustment of the cooling rate in the cooling step may be performed by adjusting the cooling amount of the corresponding portion.
- the cooling rate of the second part may be higher than that of the first part in the cooling step.
- the adjustment of the cooling rate may be performed by adjusting the amount of cooling water supplied in the width direction and the length direction of the steel sheet.
- the present invention can provide a steel sheet for calibration for calibrating the sensitivity of a sensor in hardness measurement in which a sudden signal change does not occur through the configuration, an inspection apparatus including the same, and a method for manufacturing the steel sheet for calibration.
- FIG. 2 is a cross-sectional photograph of the surface layer of a steel sheet
- (a) is a cross-sectional photograph of the high hardness portion formed by arcing
- (b) is a cross-sectional photograph of the high hardness portion formed by local subcooling.
- FIG. 3 is a process flow chart for manufacturing a steel sheet for straightening according to the present invention.
- FIG. 4 is a schematic view of a steel sheet for straightening according to the present invention.
- FIG. 5 is a schematic diagram of a cooling process in one embodiment
- FIG. 6 is a schematic diagram of a cooling process in another embodiment
- FIG. 7 is a schematic diagram of an electromagnetic inspection device capable of calibration according to the present invention.
- FIG. 8 is a graph of hardness along the width direction of the straightening steel sheet of FIG. 7 .
- FIG. 9 is a signal graph along the width direction of the straightening steel sheet of FIG. 7 .
- FIG. 10 is a signal graph obtained by each electromagnetic sensor of FIG. 7 .
- 11 is a graph obtained by correcting the signal graph of FIG. 10 by the calibration unit.
- electromagnetic inspection device 10 water supply equipment
- the thick plate can be used as an oil pipeline or a gas pipe.
- rigidity and sour performance are required so that there is no problem due to the material passing through it.
- TMCP Thermo-Mechanical Control Process Steel
- TMCP Thermo-Mechanical Control Process Steel
- Fig. 1 (a) discloses a cross-sectional photograph of a high-hardness portion generated by carburizing
- Fig. 1 (b) discloses a cross-sectional photograph of a high-hardness portion generated by local subcooling.
- mold powder (C: 0.1wt% or more) remains in the slab surface layer and the boundary of the defect structure is clear, and the high-hardness part is different The parts and composition are different. Therefore, it can be easily detected by the electromagnetic inspection apparatus.
- the boundary of the connective tissue is unclear because it has the same composition as the material, but the phase transformed from austenite by supercooling is different. there is Therefore, it is necessary to develop an inspection apparatus capable of determining a defect that is relatively difficult to measure.
- an electric or magnetic field is applied to the steel sheet, and a signal changed by the material properties of the steel sheet is sensed, or an additional sensor is arranged to measure the current/voltage/magnetic field strength generated by the material properties of the steel sheet. This is a device that inspects the characteristics of a steel plate.
- Hardness is also a kind of material property. For example, when the hardness value increases when inspected with an eddy current measuring device, the measured signal value becomes smaller due to the property that the width of the hysteresis curve in the B-H curve increases (increased energy loss). , can be used to measure the hardness value of the material. However, since there are various factors affecting the measured signal, it is difficult to know whether the measured signal value is changed by hardness or by other factors such as residual stress, dislocation, and residual magnetization. This situation is the same even in the case of a leakage flux measuring device that is not an eddy current measuring device.
- a high-hardness part is made by creating an artificial defect in the steel sheet.
- the arcing-material is melted and then solidified to form a high-hardness part- is disclosed in Patent Document 1.
- Fig. 2(a) discloses a cross-sectional photograph of a high-hardness portion formed by arcing
- FIG. 2(b) discloses a cross-sectional photograph of a high-hardness portion formed by local subcooling.
- the high-hardness is the same, but the high-hardness portion has a re-solidified solidified tissue.
- crystal grains are maintained in the case of overcooling, and electromagnetic signals are also affected by grain boundaries, it can be seen that electromagnetic signals are not generated equally even with the same hardness.
- the calibration is performed based on a defect different from the actual defect. It makes the inspection of defects due to local subcooling more difficult.
- the electromagnetic inspection apparatus is not limited to the eddy current inspection apparatus and may be applied to various electromagnetic inspection apparatuses.
- FIG. 3 is a flowchart of a method for manufacturing a steel plate for straightening according to the present invention
- FIG. 4 is a plan view of a steel plate for straightening (CP) according to the present invention.
- the present invention is to provide a calibration steel sheet capable of calibrating an electromagnetic sensor to accurately measure a high hardness steel sheet with an electromagnetic sensor, and a manufacturing method for manufacturing the same.
- the basic concept is to calibrate the electromagnetic sensor with
- the factor that can affect the signal value of the electromagnetic sensor in the calibration steel plate the same as the steel plate to be measured, the relationship between the reference value obtained by actual measurement and the signal value of the sensor can be easily and quickly matched. It enables fast and accurate measurement without any deviation between the sensors.
- Figure 3 discloses a method of manufacturing a steel plate for straightening (CP) according to the present invention.
- the calibration steel sheet (CP) has the same composition as the measured steel sheet (P), is manufactured to have the same size (thickness/width/length), heating step (S110), rolling step (S120) ), is generated through the cooling step (S130).
- the heating step (S110) and the rolling step (S120) are basically the same as the manufacturing process of the steel sheet P to be measured. That is, after making a heating slab by heating in a heating furnace, it is rolled in a rolling mill to have the same size (thickness/width/length) as the steel sheet P to be measured.
- the cooling state is shown in FIG.
- the straightening steel plate CP is transferred by the roll 20 , and is cooled by the water sprayed from the water injection facility 10 .
- the correction steel plate CP is cooled while the amount of water sprayed from the watering facility 10 is different in the plurality of areas A, B, C, and D.
- the steel sheet having an austenite phase in the rolling step (S120) is cooled at different cooling rates in the cooling step (S130), thereby having different phases.
- the regions subjected to local subcooling for example, regions B and D, have a relatively high hardness due to a large amount of bainite, and in the case of region A, the cooling rate is low and thus the hardness becomes low.
- any facility may be applied as long as the watering amount can be adjusted in the width direction (X direction) of the steel sheet, for example, a facility such as KR 10-1767774 may be applied.
- the straightening steel plate CP as shown in FIG. 4 is manufactured.
- the steel sheet for calibration CP is moved to the calibration area Z2 of the electromagnetic inspection device 1 to be described later after cooling is completed, and is demagnetized by a demagnetization facility.
- a steel sheet having a short side (width direction, X direction in FIG. 4) and a long side (length direction, Y direction in FIG. 4) of the steel sheet in the width direction (X direction) of the steel sheet It includes regions of different hardness. As mentioned above, each region (A, B, C, D) is divided along the width direction, and has the same length as the length of the steel plate in the longitudinal direction.
- each region has the same composition, the fractions of the transformed phases in the austenite grains are different from each other because they are cooled at different cooling rates.
- the steel sheet for straightening (CP) of the present invention has different hardness along the width direction, it is possible to provide a plurality of hardnesses required for straightening.
- it since it is manufactured in the same composition and size as the steel sheet P to be measured, it can be magnetized/demagnetized in the same way during magnetization or demagnetization. In other words, in that the degree of magnetization/demagnetization does not change due to the size, factors to be considered when measuring the steel plate to be measured (P) and when measuring the steel plate for calibration (CP) can be reduced, providing accurate calibration can do.
- the heating and rolling steps (S110, S120) go through the same steps as that of the steel sheet P to be measured, a factor affecting the magnetization in the heating and rolling steps (S110, S120), for example, the residual stress is the same or It corresponds to at least a similar level, and this ensures that the magnitude of the signal that changes according to the change in hardness in the steel plate for calibration (CP) can come out the same in the steel plate (P) to be measured.
- FIG. 6 shows another cooling method of the cooling step ( S130 ).
- the water injection quantity is adjusted in both the width direction and the length direction
- CP calibration steel plate
- Figure 7 is an electromagnetic inspection apparatus 1 capable of calibration according to an embodiment of the present invention is disclosed.
- Figure 7 (a) is a schematic diagram of a state in which calibration is started in the electromagnetic inspection device (1)
- Figure 7 (b) is a schematic diagram of the state that the calibration is finished in the electromagnetic inspection device (1)
- Figure 7 (c) is It is a schematic diagram of a state that the electromagnetic inspection device 1 inspects the steel plate P to be measured after calibration is completed.
- the electromagnetic inspection apparatus 1 includes a sensor body 100 including a plurality of electromagnetic sensors 110 disposed in the width direction of a steel plate P to be measured; a moving means connected to the sensor body 100 and moving the sensor body 100; and a steel plate for calibration (CP) disposed at a different position from the steel plate to be measured (P); And it is an electromagnetic sensor calibration device (1) comprising a calibration unit (140) connected to the electromagnetic sensor (110).
- the sensor body 100 is configured such that a plurality of electromagnetic sensors 110 are arranged in a plurality of rows along the width direction (X direction) of the steel plate.
- the sensor row is configured to measure the width of the steel plate at once.
- it is not limited thereto, and it is possible to measure while moving in the width direction of the steel plate by a moving means.
- the electromagnetic sensor 110 measures hardness using an electromagnetic method, and may be, for example, an eddy current measuring sensor or a leakage magnetic flux measuring sensor, and, as described above, an eddy current measuring sensor in this embodiment.
- the moving means is configured to move the sensor body 100 in the X-direction or in the X-direction and the Y-direction while maintaining the same distance with respect to the surface of the steel plate. It may include a linear movement means (not shown) for linearly moving the sensor main agent 100 between 100) and the guide bar 120 . Of course, in the case of a moving means, if horizontal movement is possible, various structures may be applied.
- the sensor body 100 is moved to the measurement region Z1 and the calibration region Z2 by the moving means.
- the measurement area Z1 and the calibration area Z2 may be positioned side by side.
- a steel plate for calibration CP is disposed in the calibration region Z2 , and a steel plate P to be measured may be supplied and discharged to the measurement region Z1 .
- the sensor body 100 is fixed and the steel sheet P can be moved by a conveying means such as a roller, otherwise the steel sheet to be measured
- (P) is supplied to the measurement region Z1
- the moving means in the calibration area Z2 moves the sensor body 100 at least as much as the width W of the measured steel plate P or the calibration steel plate CP. It can be moved in the width direction. Since the width of the steel plate for calibration (CP) is the same as the width (W) of the steel plate to be measured (P), in order for all electromagnetic sensors 110 to inspect the entire area in the width direction of the steel plate for calibration (CP), at least The moving means should move the sensor body 100 by the sum of the maximum distance between the width of the calibration steel plate CP and the electromagnetic sensor.
- the maximum distance between the electromagnetic sensors means the distance between the electromagnetic sensors at both ends in the X direction. Such a state is shown in Figures 7 (a) and 7 (b).
- the moving means moves the sensor body to the width of the steel sheet. Measure while moving the sum of the width (W) and the maximum distance between the electromagnetic sensor in the direction. Moving here may mean relative motion.
- each electromagnetic sensor 110 can provide the same hardness measurement value even if it is a sensor that measures different measurement values at the same hardness, thus enabling accurate inspection.
- 8 to 11 are graphs showing a calibration method of an electromagnetic inspection device capable of calibration.
- 8 shows an actual width direction hardness graph of the steel sheet for calibration
- FIG. 9 shows a signal graph and a selection area along the width direction of the steel sheet for calibration
- FIG. 10 shows the measurement of each electromagnetic sensor in each selection area The values are disclosed
- FIG. 11 shows a graph of the measured hardness and the actual hardness corrected by the calibration.
- the steel sheet for calibration (CP) is manufactured and then the actual hardness value is measured by the Leeb test, and the hardness is shown in FIG. 8 .
- region A has low hardness
- regions B and D have high hardness
- region C has medium hardness between A and B.
- the calibration unit 140 connected to the electromagnetic sensor 110 selects a plurality of regions having different hardness. For example, as shown in FIG. 9 , three regions of low hardness, medium hardness, and high hardness are selected, and the signal value is measured when the electromagnetic sensor passes through the corresponding part, and the measured signal graph is shown in FIG. . As shown in FIG. 10 , even if the same part is measured, since each sensor is not exactly the same, the signal value measured by each sensor is inevitably different.
- the present invention converts the signal value to match the actual hardness value through the calibration unit connected to the sensor, and sets a conversion formula or a corresponding relationship for each sensor so that the actual hardness and the converted hardness value always coincide. By setting a conversion formula or a corresponding relationship for each sensor in this way, calibration of each sensor is completed, and the sensor body 100 including the sensor for which calibration has been completed is sent to the measurement area Z1 to measure the steel plate P will measure
- the steel sheet including the region of high hardness, for example, 250 Hv by the sensor 110 is found by the electromagnetic inspection device 1, and the high hardness region is removed through an additional process, or the hardness is increased. After lowering heat treatment, the product is supplied to consumers. Accordingly, it is possible to provide a thick plate material free from hydrogen-induced cracks.
- the measured hardness and the actual hardness can be matched by correcting only the difference with each sensor, so that the above problem does not occur.
- the reason for the difference between the measured hardness and the actual hardness should be analyzed every time, but in the case of the example, the basic condition is the same as the measuring steel sheet and the straightening steel sheet, so there is no need to analyze for this reason. It can also easily and quickly straighten the steel plate.
- the straightening steel sheet can be manufactured by changing only the cooling step in the actual manufacturing process, and when using this, there is no need to consider a number of factors, which is advantageous for continuously manufacturing and straightening the steel sheet.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Claims (13)
- 장변과 단변을 가지며, 경도 측정 센서의 교정에 사용되는 강판으로,제 1 경도를 가지는 제 1 부분과 상기 제 1 경도보다 높은 제 2 경도를 가지는 제 2 부분을 포함하며,상기 제 1 부분과 제 2 부분은 단변 방향으로 서로 다른 위치에 배치되며,상기 제 1 부분 및 제 2 부분은 동일 조성의 오스테나이트 결정립에서 변태된 상을 가지는 교정용 강판.
- 제 1 항에 있어서,상기 제 2 부분은 상기 제 1 부분 보다 50Hv 이상 높은 경도를 가지며,상기 제 1 부분과 제 2 부분은 장변 방향으로 연장 형성되는 것을 특징으로 하는 교정용 강판.
- 제 1 항에 있어서,상기 제 2 부분은 250Hv 이상의 경도를 가지는 것을 특징으로 하는 교정용 강판.
- 제 3 항에 있어서,제 3 경도를 가지는 제 3 부분을 포함하며,상기 제 3 경도는 상기 제 1 경도 보다는 크고, 상기 제 2 경도 보다는 작으며,상기 제 3 부분은 단변 방향으로 제 1 및 제 2 부분과 다른 위치에 배치되며,상기 제 3 부분은 오스테나이트 결정립에서 변태된 상을 가지는 교정용 강판.
- 피측정 강판의 폭방향으로 배치된 복수의 전자기 센서를 포함하는 센서 본체;상기 센서 본체에 연결되며, 상기 센서 본체를 이동시키는 이동수단; 및상기 피측정 강판과 다른 위치에 배치되는 교정용 강판을 포함하는 전자기 센서 교정 장치로,상기 교정용 강판은 상기 제 1 항 내지 제 4 항 중 어느 한 항의 교정용 강판이며,상기 교정용 강판은 상기 피측정 강판과 동일한 재질 및 폭을 가지며,상기 교정용 강판 상에서 상기 이동수단은 상기 전자기 센서 사이의 최대 거리와 상기 교정용 강판의 폭의 합 이상의 이동거리를 갖게 구성되는 교정이 가능한 전자기 검사 장치.
- 제 5 항에 있어서,상기 복수의 전자기 센서와 연결된 교정부를 더 포함하며,상기 교정부는 상기 복수의 전자기 센서에서 상기 제 1 부분을 측정한 측정값 및 상기 제 2 부분을 측정한 측정값에 기초하여 상기 복수의 전자기 센서를 교정하는 것을 특징으로 하는 교정이 가능한 전자기 검사 장치.
- 제 6 항에 있어서,상기 교정부는 상기 전자기 센서에서 측정된 측정값을 경도로 환산 시, 상기 측정된 부분의 경도와 동일하게 환산하게 교정을 수행하는 것을 특징으로 하는 교정이 가능한 전자기 검사 장치.
- 제 5 항에 있어서,상기 피측정 강판과 상기 교정용 강판은 길이 및 두께가 동일한 것을 특징으로 하는 교정이 가능한 전자기 검사 장치.
- 제 5 항에 있어서,상기 피측정 강판이 배치되는 측정 영역과 상기 교정용 강판이 배치되는 교정 영역은 나란히 배치되는 것을 특징으로 하는 교정이 가능한 전자기 검사 장치.
- 센서 교정용 강판의 제작 방법으로,상기 강판을 가열로에서 가열하는 가열단계;가열된 강판을 압연롤로 압연하는 압연단계; 및압연된 강판을 냉각하는 냉각단계;를 포함하며,상기 냉각 단계에서 상기 강판은 강판의 폭방향을 따라서 다른 위치에 제 1 부분과 제 2 부분을 포함하며, 상기 제 1 부분과 제 2 부분의 냉각 속도가 상이한 교정용 강판의 제작 방법.
- 제 10 항에 있어서,상기 냉각 단계에서 냉각 속도의 조절은 대응하는 부분의 냉각 수량을 조절함으로써 수행되는 것을 특징으로 하는 교정용 강판의 제작 방법.
- 제 10 항에 있어서,상기 냉각 단계에서 상기 제 1 부분보다 상기 제 2 부분의 냉각 속도가 높은 것을 특징으로 하는 교정용 강판의 제작 방법.
- 제 12 항에 있어서,상기 냉각 단계에서, 냉각 속도의 조절은 강판의 폭방향 및 길이 방향에서 공급되는 냉각수량을 조절함으로써 수행되는 것을 특징으로 하는 교정용 강판의 제작 방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/033,244 US20240027399A1 (en) | 2020-12-21 | 2021-12-10 | Electromagnetic inspection device capable of calibration |
CN202180073065.7A CN116348760A (zh) | 2020-12-21 | 2021-12-10 | 校正钢板、能够进行校正的电磁检查装置、和用于制造校正钢板的方法 |
JP2023520187A JP7461569B2 (ja) | 2020-12-21 | 2021-12-10 | 校正が可能な電磁気検査装置 |
EP21911348.7A EP4266043A1 (en) | 2020-12-21 | 2021-12-10 | Correction steel sheet, electromagnetic inspection device capable of correcting, and method for manufacturing correction steel sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020200179341A KR102553226B1 (ko) | 2020-12-21 | 2020-12-21 | 전자기 검사 장치 |
KR10-2020-0179341 | 2020-12-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022139281A1 true WO2022139281A1 (ko) | 2022-06-30 |
Family
ID=82159613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2021/018740 WO2022139281A1 (ko) | 2020-12-21 | 2021-12-10 | 교정용 강판, 교정이 가능한 전자기 검사 장치 및 교정용 강판의 제조 방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240027399A1 (ko) |
EP (1) | EP4266043A1 (ko) |
JP (1) | JP7461569B2 (ko) |
KR (1) | KR102553226B1 (ko) |
CN (1) | CN116348760A (ko) |
WO (1) | WO2022139281A1 (ko) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11326296A (ja) * | 1998-05-18 | 1999-11-26 | Nkk Corp | 超音波探触子の校正方法及び超音波探傷装置 |
JP2000227421A (ja) | 1999-02-08 | 2000-08-15 | Nkk Corp | 渦流探傷法 |
KR100949316B1 (ko) * | 2007-11-13 | 2010-03-23 | 한국표준과학연구원 | 비커스 경도 압흔 측정 계측기 교정용 표준시편 |
KR20130126962A (ko) * | 2010-12-24 | 2013-11-21 | 뵈스트알파인 스탈 게엠베하 | 상이한 경도 및/또는 연성 영역을 갖는 경화 부품의 제조 방법 |
KR101767774B1 (ko) | 2015-12-23 | 2017-08-14 | 주식회사 포스코 | 냉각장치 |
JP2019042807A (ja) | 2017-09-04 | 2019-03-22 | Jfeスチール株式会社 | 鋼板の製造方法及び磁性材用表層硬さ計測装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4998820B2 (ja) | 2007-03-14 | 2012-08-15 | 住友金属工業株式会社 | 渦流検査方法及び該渦流検査方法を実施するための渦流検査装置 |
JP2009014678A (ja) | 2007-07-09 | 2009-01-22 | Toshiba Corp | アレイ型磁気探傷装置の校正装置、及びその校正方法 |
JP2019095427A (ja) * | 2017-11-17 | 2019-06-20 | 国立大学法人 大分大学 | 電磁気センサ及びこれを用いた鋼管の検査方法 |
JP7265139B2 (ja) | 2019-05-10 | 2023-04-26 | 日本製鉄株式会社 | 鋼材の表層の検査方法及び鋼材表層検査システム |
-
2020
- 2020-12-21 KR KR1020200179341A patent/KR102553226B1/ko active IP Right Grant
-
2021
- 2021-12-10 CN CN202180073065.7A patent/CN116348760A/zh active Pending
- 2021-12-10 WO PCT/KR2021/018740 patent/WO2022139281A1/ko active Application Filing
- 2021-12-10 JP JP2023520187A patent/JP7461569B2/ja active Active
- 2021-12-10 EP EP21911348.7A patent/EP4266043A1/en active Pending
- 2021-12-10 US US18/033,244 patent/US20240027399A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11326296A (ja) * | 1998-05-18 | 1999-11-26 | Nkk Corp | 超音波探触子の校正方法及び超音波探傷装置 |
JP2000227421A (ja) | 1999-02-08 | 2000-08-15 | Nkk Corp | 渦流探傷法 |
KR100949316B1 (ko) * | 2007-11-13 | 2010-03-23 | 한국표준과학연구원 | 비커스 경도 압흔 측정 계측기 교정용 표준시편 |
KR20130126962A (ko) * | 2010-12-24 | 2013-11-21 | 뵈스트알파인 스탈 게엠베하 | 상이한 경도 및/또는 연성 영역을 갖는 경화 부품의 제조 방법 |
KR101767774B1 (ko) | 2015-12-23 | 2017-08-14 | 주식회사 포스코 | 냉각장치 |
JP2019042807A (ja) | 2017-09-04 | 2019-03-22 | Jfeスチール株式会社 | 鋼板の製造方法及び磁性材用表層硬さ計測装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20220089061A (ko) | 2022-06-28 |
JP7461569B2 (ja) | 2024-04-03 |
KR102553226B1 (ko) | 2023-07-07 |
US20240027399A1 (en) | 2024-01-25 |
CN116348760A (zh) | 2023-06-27 |
JP2023544371A (ja) | 2023-10-23 |
EP4266043A1 (en) | 2023-10-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101521762B1 (ko) | 금속 제조 공정에서 금속 재료들에서의 크랙 검출을 위한 배열체 | |
WO2022139281A1 (ko) | 교정용 강판, 교정이 가능한 전자기 검사 장치 및 교정용 강판의 제조 방법 | |
CN106092777A (zh) | 基于线缆绝缘护套热延伸性能的检测方法 | |
GB1590682A (en) | Method of producing steel strip material involving obtaining a profile or other characteristic indicating quality of a coil of steel strip material and continuous testing apparatus for determining the magnetic characteristics of a strip of moving material including a method of obtaining a profile indicative of the quality of the strip throughout its entire length and flux inducing and pick up device therefor and continuous testing apparatus for determining the magnetic characteristics of a moving workpiece | |
WO2020130645A1 (ko) | 방향성 전기강판 및 그의 제조 방법 | |
WO2021125828A1 (ko) | 강판 표면 재질 검사 장치 및 방법 | |
WO2021210830A1 (ko) | 서치코일 타입 센서를 이용한 물체의 무극 보정 및 변위 측정 장치 | |
WO2021015494A1 (ko) | 강판 결함 탐상 장치 및 그것을 이용한 탐상 장치 셋 | |
WO2020111735A2 (ko) | 방향성 전기강판 및 그의 제조 방법 | |
JPH1068705A (ja) | 鋼材の変態率測定方法および装置 | |
CN102373382A (zh) | 一种杨氏模量性能检测的标准样品及其制备方法 | |
WO2017111216A1 (ko) | 스트립 형상 교정장치 및 방법 | |
WO2019017607A2 (ko) | 이차전지용 전극 제조시스템 및 제조방법 | |
JP5310149B2 (ja) | 厚鋼板の材質保証設備 | |
Usarek et al. | Magnetic field gradient as the most useful signal for detection of flaws using MFL technique | |
JP5310150B2 (ja) | 厚鋼板の材質保証設備 | |
KR900005481B1 (ko) | 강철재의 변태량 및 평탄성의 온라인 검출장치 | |
JP2012035288A (ja) | 電子ビーム照射方法 | |
JP3487463B2 (ja) | 連続鋳造機におけるロール間隔の異常検知方法 | |
KR920006837B1 (ko) | 열전대 온도측정루프 관리방법 및 그 장치 | |
Svenman et al. | Investigation of effects from realistic influences on inductive gap measurement | |
JP5310146B2 (ja) | 厚鋼板の材質保証設備 | |
JP5391758B2 (ja) | 厚鋼板の材質保証設備 | |
SU1310706A1 (ru) | Способ измерени одноосных напр жений в стальных издели х | |
JP5310151B2 (ja) | 厚鋼板の材質保証設備 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21911348 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2023520187 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18033244 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021911348 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021911348 Country of ref document: EP Effective date: 20230721 |