WO2014098297A1 - 고강도강의 형상 교정 및 압연 방법과 형상 교정 장치 - Google Patents
고강도강의 형상 교정 및 압연 방법과 형상 교정 장치 Download PDFInfo
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- WO2014098297A1 WO2014098297A1 PCT/KR2012/011542 KR2012011542W WO2014098297A1 WO 2014098297 A1 WO2014098297 A1 WO 2014098297A1 KR 2012011542 W KR2012011542 W KR 2012011542W WO 2014098297 A1 WO2014098297 A1 WO 2014098297A1
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- WIPO (PCT)
- Prior art keywords
- strip
- coil
- temperature
- shape correction
- heat pipe
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
- B21B15/005—Lubricating, cooling or heating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
-
- 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
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with 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
- 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
-
- 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
- C21D8/0242—Flattening; Dressing; Flexing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/08—Lubricating, cooling or heating rolls internally
- B21B2027/086—Lubricating, cooling or heating rolls internally heating internally
-
- 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
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
-
- 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
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/16—Unwinding or uncoiling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- 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
Definitions
- the present invention relates to a shape correction and rolling method and a shape correction apparatus of high strength steel, specifically, a method and shape correction apparatus for performing shape correction and rolling using a heat pipe roll in a warm state to enable shape correction of high strength steel. will be.
- steel sheets In order to meet environmental regulations and fuel efficiency reduction in the automotive industry, steel sheets continue to be highly strengthened. As the steel sheet becomes higher in strength, the shape of the plate becomes poor, and the calibration process for correcting it takes a load. However, these high strength steels are not well shaped even after the calibration process. In order to overcome this problem, the temperature of the strip is increased and it is calibrated. If the work is done without any extra means, the work roll receives heat from the strip and a large heat crown is formed. Generates uncontrollable heavy waves, making them less valuable.
- Patent Document 1 and Patent Document 2 disclose only the fact that it will be effective to carry out calibration or temper rolling in the warm region of higher temperature than normal temperature. It does not disclose whether it can be used, and does not recognize the problem that, in the case of simply using a strip above room temperature, the shape of the roll may be caused by the rise of the temperature due to the rise of the temperature.
- Patent Document 1 KR10-1153732 B
- Patent Document 2 JPH10-005809 A [Detailed Description of the Invention]
- the present invention is to solve the problems of the prior art as described above, and an object of the present invention is to provide a shape correction and rolling method of high strength steel that can effectively achieve the shape correction of high strength steel.
- the present invention provides a shape correction and rolling method and a shape correction apparatus for high-strength steel that can reduce or eliminate the waiting time in the conventional 3 to 5 constant yards so that the hot rolled winding process and the shape correction and rolling process can be directly connected. It aims to do it.
- the present invention in order to achieve the above object, provides a shape correction and rolling method and a shape correction device of the high strength steel as follows.
- the present invention provides a hot rolled-skin pass mill direct transfer step of sending a hot rolled coil to a payoff reel; Unwinding the coil from the payoff reel: a shape correcting step of shaping the uncovered strip using a heat pipe; And a rewinding step of rewinding the strip into a coil.
- the present invention includes a first transfer step of transferring the hot rolled coil to the temperature control unit; A cooling step of cooling while monitoring the temperature of the coil; A second transfer step of cooling the coil having a temperature of at least 150 degrees to a payoff reel; Unwinding the pegged coil from a payoff reel; A shape correction step of shape-correcting the unwound strip using a heat pipe roll; And a rewinding step of rewinding the strip into a coil.
- the rolling step may be performed with a reduction ratio of 20 to 30 3 ⁇ 4 before the shape correction step, and the scale removing step of removing the scale of the strip surface through the male blast before the rolling step.
- the temperature of the strip during the shape correction step may be less than 150 ° C phase transformation temperature.
- the method may further include a warm rolling step which is continuously performed after the rewinding step.
- the angle angle is a measurement step for measuring the temperature of the coil and the measured temperature value is compared with a predetermined temperature range, the measured temperature value is a predetermined silver range It may include a determination step of determining whether or not included in. ,
- the cooling step is carried out in the skid of the cooling yard, the skid is disposed within the thermocouple, it is possible to measure the temperature of the coil from the temperature of the skid heated by the coil seated on the skid.
- the warming step of warming the coil may be performed together with the unwinding step so that the coil is prevented from cooling while the unwinding step is performed.
- the present invention may include a strip heating step of heating the strip before the shape correction step so that the temperature of the strip flowing into the shape correction step is constant.
- the shape correction step of the present invention may be performed by a skin pass mill comprising a pair of heat pipes in contact with a strip and a backup for supporting the heat pipe rolls.
- the heat pipe roll includes a plurality of first heat pipes extending from one side in the longitudinal direction to the center portion and a plurality of second heat pipes extending from the opposite side to the center portion, wherein the first and second heats Pipes may be alternately arranged along the circumferential direction of.
- first heat pipe and the second heat pipe may intersect with each other at a longitudinal central portion of.
- the present invention is a payoff reel to release the coil; A skin pass mill for correcting the strip unwound from the payoff reel; And a coiler for rewinding the strip passing through the skin pass mill, wherein the work of the skin pass mill provides a shape correction apparatus for high strength steel which is a heat pipe roll having a heat pipe embedded therein.
- the heat pipe includes a plurality of first heat pipes extending from one side in the longitudinal direction to the center portion and a plurality of second heat pipes extending from the opposite side to the center portion, wherein the first and second Heat pipes may be alternately arranged along the circumferential direction of.
- the heat pipe of the present invention may be a plurality of uniformly embedded in a predetermined depth along the circumferential direction of the workpiece.
- the strip is heated between the payoff reel and the skin pass mill.
- a heater is disposed and the heater can heat the strip to more than 150 degrees and less than phase transformation silver.
- the first heat pipe and the second heat pipe may intersect each other at a longitudinal center portion thereof.
- the payoff reel and the skin pass mill may include a shot blaster for injecting a steel ball of the unit into the strip and a rolling mill for rolling the strip behind the shot blaster.
- the present invention can provide a high-strength steel shape correction and rolling method and a high-strength steel shape correction apparatus that can effectively achieve the shape correction of high strength steel through the above configuration.
- the present invention can provide a high-strength steel shape correction and rolling method and a high-strength steel shape correction apparatus capable of maximizing the shape correction ability of the strip, without being affected by the temperature of the strip, the number of rolls and the workpiece input order.
- the present invention can provide a shape correction and rolling method and a shape correction apparatus for high strength steel which can reduce or eliminate the waiting time in the yard so that the hot rolled winding process and the shape correction and rolling process can be directly connected to each other. Operational efficiency can be secured and inventory can be removed.
- 1 is a schematic of a conventional hot rolled-correction process.
- 2 is a schematic diagram of a shape correction and rolling process of a high strength steel according to a first embodiment of the present invention.
- FIG. 3 is a heat pipe, in which FIG. 3 (a) is a longitudinal sectional view of the heat pipe and FIG. 3 (b) is a transverse cross-sectional view of the heat pipe.
- Figure 4 is a graph showing the yield strength with temperature.
- FIG. 5 is a front view of the heat pipe of the first embodiment of the present invention.
- FIG. 6 is a side view of the heat pipe of FIG. 5.
- FIG. 7 is a conceptual view illustrating a heat pipe embedded in a heat pipe of the present invention.
- Fig. 8 is a schematic diagram showing the yards of the first and second embodiments of the present invention
- Fig. 8A is a schematic diagram before the coil is placed in the yard
- Fig. 8B is a schematic diagram in which the coil is placed in the yard.
- FIG. 9 is a schematic diagram of a shape correction and rolling process of a high strength steel according to a second embodiment of the present invention.
- FIG. 10 is a schematic diagram of a shape correction and rolling process of a high strength steel according to a third embodiment of the present invention.
- 11 is a graph showing the temperature of according to the number of coils in the conventional shape correction apparatus.
- FIG. 12 is a graph showing the temperature of the heat pipe according to the number of coils in the shape correction apparatus of the present invention.
- FIG. 13 is a graph showing a thermal crown in the shape correction apparatus of the prior art and the present invention.
- 14 is a photograph showing the shape of the hot rolled strip
- FIG. 15 is a photograph showing a state after the strip of FIG. 14 passes a conventional shape correction apparatus at room temperature
- FIG. 16 is a conventional shape of the strip of FIG. It is a photograph showing the state after passing through the calibration apparatus warmly
- FIG. 17 is a photograph showing the state after the strip of FIG. 14 passes through the shape correction apparatus of the present invention. . Explanation of the sign
- first heat pipe 105 second heat pipe
- the temperature is increased by the shape correction, it has an initial thermal crown shape in consideration of the expansion of the rising temperature.
- the shape is corrected by increasing the temperature, the temperature of is changed as the calibration proceeds.
- the appropriate shape changes.
- the temperature of the strip supplied to the calibration device is not constant, the shape changes with every strip or with the progress of the strip. Therefore, since the crown shape must be changed every time, it has not been applied in practice.
- the present invention is capable of manufacturing a wide width high strength steel through the shape correction step and apparatus including a calibration step using a heat pipe.
- 2 shows a schematic diagram of the shape correction and rolling process of the high strength steel according to the first embodiment of the present invention.
- the strip After passing through the milling mill 1, the strip is angled by the cornering device 2 so that it can be wound up, and then wound through the coiler 3.
- the coil thus wound is placed in the temperature regulation step 20, ie the yard, by the first transfer step.
- the coil C (FIG. 8) wound in the temperature adjusting step 20 is continuously measured in temperature, and is conveyed by the second conveying step to the shape correction line in a state having a predetermined temperature, that is, a temperature of 150 degrees or more.
- the coil In the shape correction line, the coil is unwound through the payoff reel 30, and the strip unwound from the coil is descaled by the shot blaster 31 on the surface, and a heating device 32 for temperature equalization. After passing through, it is primarily pressed down by the rolling mill 33, and shape-corrected by the skin pass mill 40. FIG. Thereafter, the strip is rewound by the coiler 35.
- the skin pass mill 40 is to correct the shape of the strip by using the heat pipe (100), by using the heat pipe (100), the strip of 150 ° C or more to the heat pipe roll (100) Even though the thermal crown can be kept constant, shape correction can also be achieved because high strength steel strips are provided at temperatures above 150 ° C. '
- the rewound coil is provided in a rolling step directly in the warm state, unwound in strips on the payoff reel 50 and then rolled through six to eight rolling mills 51.
- the hot rolling mill 1, the engraving device 2 and the coiler 3 are the same as in the prior art, and thus detailed description thereof will be omitted. ⁇
- the present invention uses a strip having a temperature of 150 degrees or more in the shape correction line, the time required for the cooling step 20 can be shortened.
- the angle can be made quickly when the temperature is high, but in that it takes a lot of time as the temperature is lowered, the time required in the angle step 20 can be significantly reduced from the conventional 3-5 days to 1 day have.
- the strip released from the payoff reel (30) is surfaced by the shot blast (31).
- the scale is removed. This is to prevent occurrence of a phenomenon due to the scale caused by the subsequent rolling mill 33.
- Shot blast (31) is used to remove the scale formed on the surface before pickling in the electrical steel sheet process or stainless steel process, the steel ball of several tens of diameters on the strip, the centrifugal force at the bottom to the strip It is a device for removing the scale formed on the shoot strip.
- the strip whose surface is descaled by the shot blast 31 passes through the heater 32.
- the heater 32 is for temperature uniformity in the strip and may not be heated to a constant temperature.
- An induction heater may be used as the heater 32, and if a logic for correcting the gap setting due to temperature fluctuations is provided in operating the setting model related to gap and roll speed during rolling through the rolling mill 33, It may also be performed without the heater 32.
- the rolling mill 33 is one-stage rolling and is carried out at a reduction ratio of about 20 to 30%. When the reduction ratio is more than 3, the shape is so bad that it cannot be caught by the subsequent skin pass mill 40.
- the high strength steel is rolled at more than 150 degrees of silver, which can have a greater effect than rolling in a subsequent process, allowing the final product to be formed into a wider and thinner product.
- the strip passing through the rolling mill 33 enters the skin pass mill 40 including the heat pipe 100.
- the shape correction apparatus 40 of the present invention includes the heat pipe 100, it is free to the temperature of the incoming strip. Therefore, shape correction can be performed well even when a relatively hot strip is introduced. That is, by the heat pipe (100), the overall temperature is increased evenly, which uniformly holds the thermal crown shape, so that the shape correction can be always performed perfectly regardless of the degree of silver or the number of rolls supplied. To be.
- the heat pipe 100 will be described in detail later with reference to FIGS.
- 3-7 show a view of a heat pipe 100 of the present invention.
- FIG. 3 shows longitudinal and transverse cross-sectional views of the heat pipe 110 entering the heat pipe 100
- FIG. 4 shows a graph of yield strength of high strength steel with temperature
- FIG. 5 shows the present invention.
- the front and back views of the heat pipe 100 of FIG. 6 is a side view of the heat pipe 100 of the present invention shown in FIG. 6, and FIG. 7 shows a heat pipe embedded in the heat pipe of the present invention. It is.
- the heat pipe 100 means a roll in which the heat pipe 110 is embedded in the workpiece.
- a groove 112 is formed in a pipe 111 having a vacuum formed therein, and the groove is filled with pure water.
- the pure water is evaporated by the heat to fill the central portion 113a. Since the pressure of the central portion 113a is increased due to the water vapor formed in the central portion 113a, the water vapor is moved to both sides with low pressure, and the water vapor is angled at the side portion 113b to return to pure water.
- the pure water in the groove 112 evaporates by heat in the central portion 113a
- the pure water in the side portion 113b is moved back to the central portion 113a due to the capillary phenomenon of the flaw 112.
- evaporation occurs in the central portion 113a
- condensation occurs in the side portion 113b
- water vapor flows from the central portion 113a to the side portion 113b
- pure water moves from the side portion 113b to the central portion 113a.
- the heat pipe 110 evenly distributes the heat in the heating unit by the internal circulation.
- the yield strength of the high strength steel can be reduced to a significant level only if the silver is at least 150 degrees, the yield strength at room temperature or 100 degrees or so Is not greatly reduced, so the effect of the actual shape correction is low. Therefore, the present invention uses a strip having a temperature of at least 150 degrees, it is of course also possible to use a strip of lower temperature. At this time, the present invention should be heated to less than the phase transformation temperature of the high strength steel so as not to change the structure of the high strength steel. As shown in FIGS. 5-7, the heat pipe 100 of the present invention is similar to general shape corrected rolling, but the heat pipe 110 is disposed in the journal portion 104 between the rolled portion 102 and the neck portion 103. It is built in.
- the number of heat pipes 110 is a plurality of built-in, one heat pipe 110 is a whole It may be embedded through the rolling unit 102, but may be composed of a first heat pipe 105 inserted from one side and a second heat pipe 106 inserted from the other side.
- first and second heat pipes 105, 106 are alternately arranged in the circumferential direction. That is, in forming the heat pipes 105 and 106 insert pipes, it is advantageous to manufacture them so that they do not meet with each other, and cracks can be prevented from being formed by repeated loads by rolling.
- first and second heat pipes 105 and 106 overlap each other at the central portion of the rolling part 102.
- the most temperature in the center is reduced, where the first and second heat pipes 105, 106 overlap each other in the center of the rolling section 102, thereby lowering the temperature of the center, It will lower the temperature difference of the whole area of (100).
- Heat pipe 100 in the present invention does not change the shape depending on the degree of silver. That is, in the heat pipe roll 100, it is possible to lower the temperature difference between the center and both ends.
- the heat pipe 100 allows the heat pipe 100 to maintain a constant temperature difference regardless of the temperature of the strip supplied.
- the edge temperature of the rolling part 102 is 50 ° C.
- the temperature of the center part is about 65 ° C.
- the temperature of the center part is 85 ° when the edge temperature of the rolling part 102 is 70 ° C.
- the heat pipe 110 embedded in the heat pipe 100 of the present invention is After the evaporation of pure water by the high temperature, the pressure is increased to the edge, then the silver drops to return to the pure water, then moved back to the center by capillary action, the process is repeated, and the evaporation / condensation of the pure water By the heat of the center of the heat pipe roll 100 is distributed to the edges, which can lead to a uniform temperature in the width direction.
- 8A and 8B on the other hand, the skid used for the cooling step 20, ie the yard, of the present invention is shown.
- the skid of the cooling step 20 of the present invention forms a through hole 27 in the body 21 including the mounting surface 22 on which the coil C is placed, and the through hole.
- the silver sensor 25 is disposed inside.
- the temperature sensor 25 disposed as described above measures the temperature of the coil C and sends the temperature to the observer or controller 28, and the observer or controller 28 checks the temperature of the coil C, When the temperature enters the corresponding temperature range in preparation for the preset temperature range, the coil (C) is taken out of the yard and put on the payoff reel.
- the temperature range may be determined according to need, but it is preferable to have a temperature of at least 150 degrees in consideration of cooling during release through the payoff reel. 9 shows a second embodiment of the present invention.
- the coil wound in the coiler 3 of the hot rolling process is placed in the temperature regulation step 20, i.e. yard, by the first transfer step.
- the coil C (FIG. 8) wound in the temperature adjusting step 20 is constantly accumulating silver, and shape correction in a state having a predetermined temperature, that is, a temperature of 150 degrees or more. Conveyed by a second conveying step into the line.
- Insulation cover 34a, 34b which keeps heat until a coil is unwound is arrange
- the insulating covers 34a and 34b may be pulled out when unwound from the payoff reel as shown, but may not be pulled out and may insulate the coils caught on the payoff reel while being unwound.
- the strip released from the coil through the pay-off reel is passed through the heating device 32 for temperature uniformity and then deliberately shaped into the skin pass mill 40, and then rewound by the coiler 35. do.
- the skin pass mill 40 uses the heat pipe roll 100 to correct the shape of the strip.
- a strip of 150 o C or more is heated. Even if the pipe is introduced into (100), the thermal crown can be kept constant, and since the high strength steel strip is provided at a temperature of 150 ° C. or higher, shape correction can be made well.
- 10 shows a third embodiment of the present invention.
- the coil wound in the coiler 3 of the hot rolling process is subjected to the cooling step 20. It is provided as a shape correction device without going through. That is, the wound coil is immediately unwound with a payoff reel.
- a single device performs a role of a coiler and a payoff reel at the same time, but also includes a case in which a coiler and a payoff reel exist separately, and a coil wound in the coiler is directly moved to a payoff reel. . That is, as long as the direct transfer step of directly sending the hot rolled coil to the shape correction device, it may have any shape.
- the strip thus unwound is directly supplied to the skin pass mill 40, and is rewound 35 after the shape is corrected in the skin pass mill 40.
- FIG. As described above in the present invention, since the skin pass mill 40 includes the heat pipe 100, the skin pass mill 40 is free from the temperature of the strip to be supplied, and thus can be stably corrected even if a strip having a high temperature is supplied. In addition, as shown in Figure 4, the yield strength is lowered when the temperature is high, more smooth shape correction can be performed.
- 11 is a graph showing the temperature of the coil according to the number of coils and the widthwise position when the strip having a temperature of 100 to 120 ° C. is corrected by a conventional shape correcting apparatus. When a strip having a temperature of C is calibrated in the shape correction apparatus of the present invention, a graph showing the temperature of the heat pipe according to the number of coils and the widthwise position is shown.
- the temperature difference between the central portion and the edge of E increases from 35 0 C to 50 o C, If the number of purchases increases, the temperature difference is expected to increase.
- the temperature difference between the center and the edge of the heat pipe is 20 to 25 ° although the overall temperature of the heat pipe increases with the number of coils. It remains constant as C.
- the heat pipe furnace of the present invention not only reduces the temperature difference in the width direction of the roll, but also maintains a constant temperature difference in the width direction of the furnace regardless of the overall temperature rise of the heat pape.
- FIG. 13 is a graph showing a thermal crown in the shape correction apparatus of the prior art and the present invention.
- Fig. As shown in 13, it can be seen that the thermal crown greatly reduced in the case of using a heat pipe roll of the present invention.
- the heat crown of 150 / zm grows on the basis of the center portion, while in the case of using the heat pipe, the heat crown grows about l im. That is, in the case of the heat pipe 100 of the present invention, the heat crown is only 1/10 of that of the general heat pipe.
- FIG. 14 is a photograph showing the shape of the hot rolled strip
- FIG. 15 is a photograph showing the state after the strip of FIG. 14 passes a conventional shape correction apparatus at room temperature
- FIG. 16 is a conventional shape of the strip of FIG.
- the photograph which shows the state after passing through the correction apparatus in silver is shown
- the photograph which shows the state after the strip of FIG. 14 passed through the shape correction apparatus of this invention is shown by FIG.
- the hot rolled (hot rolled) strip is formed as if the edge wave, which is maintained after passing through the shape correction apparatus at room temperature (see Fig. 15).
- the strip of Figure 14 was put into a conventional shape correction apparatus at a temperature of 130 ⁇ 190 ° C, in this case it can be seen that a severe center wave is formed as shown in Figure 16 (see the circular portion of Figure 16) .
- Figure 14 and the strip is passed through the shape correction apparatus of the present invention at a temperature of 130 ⁇ 190 ° C, as shown in Figure 17, it can be seen that the shape is corrected into a strip of a smooth shape.
- Table 1 shows an embodiment according to the present invention and a conventional shape correction apparatus and method.
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- Crystallography & Structural Chemistry (AREA)
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- Organic Chemistry (AREA)
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Abstract
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Priority Applications (4)
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CN201280077682.5A CN104870115B (zh) | 2012-12-21 | 2012-12-27 | 高强度钢的形状矫正和轧制方法以及形状矫正装置 |
EP12890177.4A EP2937156B1 (en) | 2012-12-21 | 2012-12-27 | Shape-correcting device for high-strength steel |
JP2015549232A JP6026014B2 (ja) | 2012-12-21 | 2012-12-27 | 高強度鋼の形状矯正及び圧延方法と形状矯正装置 |
US14/647,439 US10086418B2 (en) | 2012-12-21 | 2012-12-27 | Shape-correcting and rolling method and shape-correcting device for high-strength steel |
Applications Claiming Priority (2)
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KR10-2012-0150135 | 2012-12-21 | ||
KR1020120150135A KR101449180B1 (ko) | 2012-12-21 | 2012-12-21 | 고강도강의 형상 교정 및 압연 방법과 형상 교정 장치 |
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PCT/KR2012/011542 WO2014098297A1 (ko) | 2012-12-21 | 2012-12-27 | 고강도강의 형상 교정 및 압연 방법과 형상 교정 장치 |
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US (1) | US10086418B2 (ko) |
EP (1) | EP2937156B1 (ko) |
JP (1) | JP6026014B2 (ko) |
KR (1) | KR101449180B1 (ko) |
CN (1) | CN104870115B (ko) |
WO (1) | WO2014098297A1 (ko) |
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CN111604697A (zh) * | 2020-05-31 | 2020-09-01 | 日照宝华新材料有限公司 | 一种薄规格低碳钢横折缺陷的控制方法 |
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CN113245371B (zh) * | 2021-06-30 | 2022-07-19 | 燕山大学 | 一种改善冷轧板带边降的电磁调控轧辊 |
CN114769366B (zh) * | 2022-05-12 | 2024-02-20 | 武汉钢铁有限公司 | 一种改善取向钢成品板形的矫直系统及其控制方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000010065U (ko) * | 1998-11-14 | 2000-06-15 | 이구택 | 열연 스킨패스 롤 히터장치 |
JP2001105006A (ja) * | 1999-09-30 | 2001-04-17 | Sumitomo Metal Ind Ltd | 厚鋼板の製造方法およびその装置 |
KR20040049855A (ko) * | 2001-10-10 | 2004-06-12 | 제이에프이 스틸 가부시키가이샤 | 강판의 제조방법 |
KR20100007940A (ko) * | 2007-06-22 | 2010-01-22 | 에스엠에스 지마크 악티엔게젤샤프트 | 강재 스트립을 열간 압연 및 열처리하기 위한 방법 |
JP2010240691A (ja) * | 2009-04-06 | 2010-10-28 | Nippon Steel Corp | 鋼板の形状矯正方法及び装置 |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1004066A (en) | 1974-03-19 | 1977-01-25 | Nippon Steel Corporation | Method of and apparatus for controlling the shape of rolled objects in the rolling of plate, sheet, strip and the like |
JPS579501A (en) | 1980-06-19 | 1982-01-19 | Kawasaki Steel Corp | Rolling plant for material to be rolled |
JPS61269901A (ja) | 1985-05-23 | 1986-11-29 | Kawasaki Steel Corp | 冷延鋼帯の調質圧延方法 |
US4793172A (en) * | 1986-02-24 | 1988-12-27 | Italimpianti Of America Incorporated | Thermal crown controlled rolls |
US5119886A (en) | 1989-10-25 | 1992-06-09 | The Texas A&M University System | Heat transfer cylinder |
JPH0770351B2 (ja) | 1990-11-21 | 1995-07-31 | 三菱電機株式会社 | 均熱ロール装置 |
JPH06304656A (ja) * | 1993-04-27 | 1994-11-01 | Seikosha Co Ltd | ローラ矯正装置 |
JPH07204704A (ja) | 1994-01-11 | 1995-08-08 | Ishikawajima Harima Heavy Ind Co Ltd | 圧延設備 |
CA2202616C (en) * | 1994-10-20 | 2001-01-23 | Fritz-Peter Pleschiutschnigg | Process and device for producing a steel strip with the properties of a cold-rolled product |
KR100207067B1 (ko) | 1996-05-18 | 1999-07-01 | 지원국 | 전기 가열식 금속 스트립 압연기 |
NL1007739C2 (nl) * | 1997-12-08 | 1999-06-09 | Hoogovens Staal Bv | Werkwijze en inrichting voor het vervaardigen van een stalen band met hoge sterkte. |
JPH105809A (ja) | 1996-06-25 | 1998-01-13 | Nkk Corp | 熱延鋼帯の調質圧延方法 |
JPH10192915A (ja) | 1997-01-09 | 1998-07-28 | Mitsubishi Heavy Ind Ltd | 圧延機及び圧延設備 |
EP0972427A1 (en) * | 1997-01-13 | 2000-01-19 | American Roller Company | Heated roller with integral heat pipe |
JP3263359B2 (ja) * | 1997-04-04 | 2002-03-04 | 川崎製鉄株式会社 | シートバーの大単重熱間圧延方法 |
JP2000054098A (ja) | 1998-07-31 | 2000-02-22 | Nkk Corp | めっき密着性及び耐ブリスター性に優れた熱延板下地溶融亜鉛めっき鋼板の製造方法及びその製造装置 |
JP2000051910A (ja) * | 1998-08-10 | 2000-02-22 | Sumitomo Metal Ind Ltd | 連続化熱間圧延設備 |
DE19933610A1 (de) | 1999-07-17 | 2001-01-25 | Bwg Bergwerk Walzwerk | Verfahren zum Planieren von Metallbändern |
KR200196021Y1 (ko) | 2000-04-10 | 2000-09-15 | 이성영 | 간판 형광등의 점등관 접속구 |
KR100496607B1 (ko) | 2000-12-27 | 2005-06-22 | 주식회사 포스코 | 열연코일의 제조방법 및 그 장치 |
JP4692882B2 (ja) | 2005-08-11 | 2011-06-01 | 住友金属工業株式会社 | マグネシウム板とマグネシウム板の製造方法 |
JP2008213015A (ja) | 2007-03-07 | 2008-09-18 | Jfe Steel Kk | 冷延鋼板の製造方法および鋼板の連続処理ライン |
KR101053414B1 (ko) | 2008-07-04 | 2011-08-01 | 주식회사 포스코 | 열연강대의 스케일 제거방법 및 제거설비 |
CN101670372B (zh) | 2009-09-25 | 2011-01-26 | 首钢总公司 | 一种消除热轧高强钢板形缺陷的方法 |
JP5512326B2 (ja) | 2010-02-19 | 2014-06-04 | 株式会社神戸製鋼所 | 金属冷却装置および金属冷却方法 |
JP5757104B2 (ja) | 2011-02-24 | 2015-07-29 | 住友電気工業株式会社 | マグネシウム合金材及びその製造方法 |
-
2012
- 2012-12-21 KR KR1020120150135A patent/KR101449180B1/ko active IP Right Grant
- 2012-12-27 JP JP2015549232A patent/JP6026014B2/ja active Active
- 2012-12-27 US US14/647,439 patent/US10086418B2/en active Active
- 2012-12-27 CN CN201280077682.5A patent/CN104870115B/zh active Active
- 2012-12-27 WO PCT/KR2012/011542 patent/WO2014098297A1/ko active Application Filing
- 2012-12-27 EP EP12890177.4A patent/EP2937156B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000010065U (ko) * | 1998-11-14 | 2000-06-15 | 이구택 | 열연 스킨패스 롤 히터장치 |
JP2001105006A (ja) * | 1999-09-30 | 2001-04-17 | Sumitomo Metal Ind Ltd | 厚鋼板の製造方法およびその装置 |
KR20040049855A (ko) * | 2001-10-10 | 2004-06-12 | 제이에프이 스틸 가부시키가이샤 | 강판의 제조방법 |
KR20100007940A (ko) * | 2007-06-22 | 2010-01-22 | 에스엠에스 지마크 악티엔게젤샤프트 | 강재 스트립을 열간 압연 및 열처리하기 위한 방법 |
JP2010240691A (ja) * | 2009-04-06 | 2010-10-28 | Nippon Steel Corp | 鋼板の形状矯正方法及び装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111604697A (zh) * | 2020-05-31 | 2020-09-01 | 日照宝华新材料有限公司 | 一种薄规格低碳钢横折缺陷的控制方法 |
CN111604697B (zh) * | 2020-05-31 | 2021-05-14 | 日照宝华新材料有限公司 | 一种薄规格低碳钢横折缺陷的控制方法 |
Also Published As
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KR101449180B1 (ko) | 2014-10-08 |
JP2016501133A (ja) | 2016-01-18 |
US10086418B2 (en) | 2018-10-02 |
CN104870115B (zh) | 2017-10-31 |
CN104870115A (zh) | 2015-08-26 |
US20150306645A1 (en) | 2015-10-29 |
EP2937156B1 (en) | 2019-09-25 |
EP2937156A1 (en) | 2015-10-28 |
KR20140080931A (ko) | 2014-07-01 |
EP2937156A4 (en) | 2016-05-04 |
JP6026014B2 (ja) | 2016-11-16 |
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