WO2015174395A1 - 鋳片の連続鋳造方法 - Google Patents
鋳片の連続鋳造方法 Download PDFInfo
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- WO2015174395A1 WO2015174395A1 PCT/JP2015/063585 JP2015063585W WO2015174395A1 WO 2015174395 A1 WO2015174395 A1 WO 2015174395A1 JP 2015063585 W JP2015063585 W JP 2015063585W WO 2015174395 A1 WO2015174395 A1 WO 2015174395A1
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- slab
- reduction
- roll
- casting
- continuous casting
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000005266 casting Methods 0.000 claims abstract description 138
- 238000007711 solidification Methods 0.000 claims abstract description 40
- 230000008023 solidification Effects 0.000 claims abstract description 34
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims description 55
- 239000007790 solid phase Substances 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 230000007423 decrease Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/04—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a continuous process
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1282—Vertical casting and curving the cast stock to the horizontal
-
- 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
-
- 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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B2001/028—Slabs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/14—Soft reduction
Definitions
- the present invention relates to a continuous casting method of a slab, and particularly to a continuous casting method of a slab capable of producing a slab having excellent internal quality.
- Patent Document 1 Japanese Patent No. 1480540 (Patent Document 1), a convex roll and a flat roll are arranged on the downstream side of a slab cutting device of a continuous casting machine, and the central part and both end parts of the slab are sequentially strongly pressed by these rolls. The following techniques are disclosed.
- Patent Document 2 when the slab is bulged by 2 to 20 mm in a continuous casting machine and the solid phase ratio at the center of the slab in the thickness direction is 0.80 or more, the width of the slab A technique for reducing the central portion by 3 to 15 mm is disclosed.
- Patent Document 3 when the slab is squeezed during continuous casting, the temperature at the center of the slab when starting the reduction from the position after complete solidification, and the slab surface at the end of the reduction A technique is disclosed in which the temperature is specified, and the total amount of reduction when the difference between the surface temperature at the end of reduction and the center temperature at the start of reduction is 600 ° C. is equal to or greater than a predetermined magnitude.
- Patent Document 4 when the slab at the end of solidification is collectively reduced using a pair of upper and lower reduction rolls arranged at the end of a continuous casting machine, the amount of reduction of the slab And a technique for defining the relationship between the slab center porosity volume.
- Patent Document 5 two or three rolling reduction rolls having a diameter 2 to 5 times the thickness of the cast slab are continuously arranged, and the first rolling rolling roll. Discloses a technique for setting the rolling reduction ratio of the second and third rolling rolls to be 2.0 to 4.5%.
- Japanese Patent No. 1480540 Japanese Patent No. 4296985 Japanese Patent No. 4813817 JP 2007-296542 A JP-A-4-37456
- the slab has a part having an unsolidified part, a part at the end of solidification, in both the reduction of the solidified portion and the solidified portion, the solid phase ratio of the slab at the reduction position is adjusted by adjusting the casting conditions (particularly the casting speed). Therefore, in the continuous casting machine in which the position where the slab is rolled down is fixed, there is a problem that it is not possible to perform the rolling down as intended when the casting speed fluctuates. For example, a reduction in casting speed is unavoidable when casting an end slab of continuous casting.
- the rolling position of the large-diameter rolling roll is installed on the most downstream side in the casting direction (the last end of the continuous casting machine), and the machine length limit casting speed (the maximum casting speed that can be performed in the continuous casting machine)
- the machine length limit casting speed the maximum casting speed that can be performed in the continuous casting machine
- Patent Documents 2 to 4 merely specify the solid phase ratio at the center of the slab thickness direction during rolling and the surface temperature or center temperature of the slab, and the large diameter rolling down. No consideration has been given to the arrangement of rolling equipment such as rolls. Therefore, even if these techniques are used, it is impossible to continuously cast a slab having good internal quality when the casting speed fluctuates.
- the present invention has been made in view of these problems, and is capable of continuously casting a slab having good internal quality even when the casting speed is varied while the slab is reduced in a continuous casting machine.
- An object is to provide a casting method.
- a first aspect of the present invention includes a pair of rolling rolls arranged in two stages along the casting direction and each having a diameter of 1.2 to 2.0 times the thickness of the slab immediately before rolling, A method for continuously casting a slab using a continuous casting machine provided with a support roll disposed between the reduction rolls of the slab while continuously casting the slab while being reduced by the reduction roll.
- the rolling of the unsolidified portion where the solid phase ratio in the thickness direction center of the slab is less than 0.8 by the roll, and by the second-stage rolling roll arranged downstream of the first-stage rolling roll in the casting direction
- the casting speed is reduced.
- the solidification completion position of the slab moves to the upstream side in the casting direction due to
- the solid phase ratio at the center in the thickness direction of the slab by the first-stage reduction roll is 0.8 or more and less than 1.0
- the second-stage reduction roll It is a continuous casting method of a slab characterized by switching to a combination with the reduction of the solidified portion where the solid phase ratio in the thickness direction center of the slab is 1.0.
- the “rolling roll” refers to a roll that participates in a large reduction
- the “support roll” refers to a roll that does not participate in a large reduction.
- large pressure reduction which sets the gap between the support rolls in order to suppress molten steel flow due to slab bulging, solidification shrinkage, etc. at the end of solidification
- ⁇ large pressure reduction '' forces unsolidified molten steel to be discharged upstream. This is a method of rolling down a slab in a high solid state ratio where no molten steel flow occurs.
- the second aspect of the present invention includes a pair of rolling rolls arranged in two stages along the casting direction and each having a diameter of 1.2 to 2.0 times the thickness of the slab immediately before rolling,
- a third aspect of the present invention includes a pair of rolling rolls arranged in two stages along the casting direction and each having a diameter of 1.2 to 2.0 times the thickness of the slab immediately before rolling, A method for continuously casting a slab using a continuous casting machine provided with a support roll disposed between the reduction rolls of the slab while continuously casting the slab while being reduced by the reduction roll.
- Rolling at the center of the slab in the thickness direction of the slab is 0.8 or more and less than 1.0 at the end of solidification, and two stages disposed downstream in the casting direction from the first stage of the rolling roll
- the casting speed is increased from the state of casting the slab at a constant casting speed in combination with the reduction of the solidified portion where the solid phase ratio in the thickness direction center of the slab by the eye reduction roll is 1.0
- Due to the increase in casting speed the solidification completion position of the slab is downstream in the casting direction.
- the unsolidified portion of the slab with a first-stage reduction roll having a solid phase ratio at the center in the thickness direction of less than 0.8 is reduced and the second-stage reduction roll is cast.
- It is a continuous casting method of a slab characterized by switching to a combination with the reduction of the solidified portion where the solid phase ratio at the center in the thickness direction of the piece is 1.0.
- a fourth aspect of the present invention includes a pair of rolling rolls arranged in two stages along the casting direction and each having a diameter of 1.2 to 2.0 times the thickness of the slab immediately before rolling, A method for continuously casting a slab using a continuous casting machine provided with a support roll disposed between the reduction rolls of the slab while continuously casting the slab while being reduced by the reduction roll.
- the casting speed is increased from a state where the slab is cast at a constant casting speed while the slab is being reduced by the roll, the solidification completion position of the slab moves to the downstream side in the casting direction due to the increase in the casting speed.
- the reduction amount of the first-stage reduction roll used for reduction of the slab and the reduction amount of the second-stage reduction roll disposed downstream of the first-stage reduction roll in the casting direction. From the reduction by the first-stage reduction roll at the same casting speed And it switches to the reduction of stage of reduction rolls, a continuous casting method of the slab.
- a slab having good internal quality can be obtained even if the casting speed fluctuates. Moreover, since the large diameter reduction roll arrange
- FIG. 1 is a diagram showing a configuration of a continuous casting machine 10 to which the continuous casting method for cast pieces according to the present invention can be applied, and shows a state where the cast pieces are not crushed.
- Molten steel 3 injected so as to form a molten steel surface (meniscus) 2 in the mold 1 is sprayed from the mold 1 and a secondary cooling spray nozzle group (not shown) below the mold 1 (secondary cooling water). It is cooled and forms a solidified shell 4 to become a slab 5.
- the slab 5 is pulled out while holding the unsolidified molten steel 3 therein, and is appropriately reduced by a plurality of pairs of large diameter reduction rolls 6.
- the slab 5 squeezed by the large diameter reduction roll 6 is further pulled out by a pinch roll (not shown) through the support rolls 7 arranged between the large diameter reduction rolls 6 and downstream of the large diameter reduction roll 6 in the casting direction.
- a pinch roll not shown
- the casting direction is indicated by an arrow.
- the large diameter reduction roll 6 shown in FIG. 1 has a pair of large diameter reduction rolls arranged in two stages along the casting direction.
- the first large-diameter reduction roll 6a and the second large-diameter reduction roll 6b are referred to in order from the upstream side in the casting direction.
- the diameter of the first large diameter reduction roll 6a is 1.2 to 2.0 times the thickness of the slab 5 immediately before being reduced by the first large diameter reduction roll 6a.
- the diameter of the roll 6b is 1.2 to 2.0 times the thickness of the slab 5 immediately before being rolled down by the second large diameter reduction roll 6b.
- the lower limit value of the diameters of the first large diameter reduction roll 6a and the second large diameter reduction roll 6b is set to 1.2 times the thickness of the slab immediately before the respective reduction, the internal quality This is to ensure a reduction force necessary to obtain a good slab.
- the upper limit value of the diameter of the first large diameter reduction roll 6a and the second large diameter reduction roll 6b is 2.0 times the thickness of the slab immediately before the reduction, the equipment cost increases. This is to suppress an increase in bulging between rolls and rolls.
- a support roll 7 is disposed between the large diameter reduction rolls 6. Therefore, even when the interval between the large diameter reduction rolls 6 is wide, bulging is difficult to occur in the slab 5, and deterioration of the internal quality of the slab 5 can be suppressed.
- the slab 5 is rolled down by using the two-stage large-diameter reduction roll 6 disposed in the continuous casting machine 10 along the casting direction.
- the large diameter reduction roll 6 is a large diameter reduction roll whose diameter is 1.2 to 2.0 times the thickness of the slab 5 immediately before reduction.
- rolling the slab using a large diameter rolling roll is referred to as “large rolling”.
- FIGS. 2 to 5 are diagrams showing the configuration of a continuous casting machine to which the continuous casting method of a slab of the present invention can be applied.
- 2 and 3 show a state in which the slab is squeezed by both the large-diameter reduction rolls on the upstream and downstream sides in the casting direction
- FIG. 4 shows a state in which the slab is squeezed only by the large-diameter reduction rolls on the downstream side in the casting direction
- 5 shows a state in which the slab is squeezed only by the large-diameter squeeze roll on the upstream side in the casting direction.
- Case 1 corresponds to FIG. 1, and is a case where neither the first large-diameter reduction roll 6 a nor the second large-diameter reduction roll 6 b reduces the slab 5.
- Case 2 and case 3 and case 6 and case 7 correspond to FIG. 2 and FIG. 3, and the slab 5 is squeezed by the first large-diameter reduction roll 6 a, and is not squeezed by the second large-diameter reduction roll 6 b.
- the first large diameter reduction roll 6a is rolled down at the position of the unsolidified portion of the slab 5 (the portion where the central solid phase ratio is less than 0.8).
- the first large diameter reduction roll 6a is rolled down at the position of the solidification end stage portion (the portion where the central solid phase ratio is 0.8 or more and less than 1.0) of the slab 5.
- the case 4 and the case 9 correspond to FIG. 4 described above, and the slab 5 is not squeezed by the first large-diameter reduction roll 6a. This is a case of rolling down at a position where the phase ratio is 0.8 or more and less than 1.0.
- Case 5 and case 8 correspond to FIG. 5 described above, and the first large diameter reduction roll 6a is used to position the slab 5 at the end of solidification (portion where the central solid phase ratio is 0.8 or more and less than 1.0). In this case, the slab 5 is not squeezed by the second large diameter squeezing roll 6b.
- the continuous casting method of the slab of the present invention includes the following two forms. (1) When continuously casting the slab 5 with the large-diameter reduction roll 6 using the continuous casting machine 10, the slab 5 is cast at a constant casting speed while the slab 5 is being reduced in the case 2. When the casting speed is reduced from the state in which the casting is performed, the reduced form of the slab 5 is changed from the case 2 as the solidification completion position of the slab 5 moves to the upstream side in the casting direction due to the reduction in the casting speed. A continuous casting method for slabs that switches to case 3. (2) When continuously casting the slab 5 with the large diameter reduction roll 6 using the continuous casting machine 10, the slab is cast at a constant casting speed while reducing the slab 5 with the case 4.
- the amount of reduction of the first large-diameter reduction roll 6a as the solidification completion position of the slab 5 moves to the upstream side in the casting direction due to the reduction of the casting speed.
- the first large diameter reduction roll 6 a is an unsolidified portion of the slab 5 and has a central solid fraction of 0. It is preferable that the portion below 2 is reduced by 5 to 30 mm, and the solidified portion of the slab 5 is reduced by 1 to 15 mm by the second large diameter reduction roll 6b.
- Preferred embodiment (2) of the continuous casting method of the slab of the present invention In the continuous casting method of the slab of the present invention, when continuous casting is performed in the form of FIG. 3, the final solidification end portion of the slab 5 is reduced by 5 to 20 mm by the first large-diameter reduction roll 6a. It is preferable to reduce the solidified portion of the slab 5 by 1 to 15 mm with the large diameter reduction roll 6b.
- the present invention provides (3) a reduced form of the slab 5 as the solidification completion position of the slab 5 moves downstream in the casting direction due to an increase in casting speed. It is also possible to adopt a mode in which the mode is switched from 6 to the case 7 or a mode in which the reduced form of the slab 5 is switched from the case 8 to the case 9 (4).
- the continuously cast slab was a slab having a thickness of 280 to 300 mm and a width of 2300 mm made of steel having a C content of 0.16% by mass.
- the casting speed was 0.58 to 0.80 m / min. Secondary cooling was performed under conditions of a specific water amount of 0.78 to 0.94 L / kg-steel.
- the first large diameter reduction roll is arranged 21.2 m downstream from the molten steel surface in the mold in the casting direction
- the second large diameter reduction roll is 27.27 in the casting direction from the molten steel surface in the mold. It was arranged at a position 0 m downstream.
- the diameters of the first large diameter reduction roll and the second large diameter reduction roll were both 1.2 to 2.0 times the thickness of the slab immediately before reduction.
- the slab reduction started after the slab tip passed the large diameter reduction roll position.
- the evaluation items were “slab quality index” and “slab quality evaluation”.
- the “slab quality index” is the ratio of the central porosity volume of a standard slab (hereinafter also referred to as “base material”) to the central porosity volume of the slab cast in each test.
- the central porosity volume of the slab is calculated based on the specific gravity of the central portion in the thickness direction, based on the average specific gravity at the 1 ⁇ 4 thickness position of the slab where the occurrence of the central porosity is estimated to be hardly generated.
- Specific volume that is, the central porosity volume was defined by the following formula (1).
- Vp 1 / ⁇ 1 / ⁇ 0
- Vp (cm 3 / g) center porosity volume
- ⁇ (g / cm 3 ) average specific gravity at the center of slab thickness
- ⁇ 0 (g / cm 3 ) 1/4 thickness of slab The average specific gravity of the position.
- “Evaluation of cast slab quality” is an evaluation of the slab quality index (base material is 1.0 as a standard), and is represented by symbols ⁇ and ⁇ . The meaning of each symbol is as follows. ⁇ (excellent): slab quality index is larger than 3.0 ⁇ (good): slab quality index is more than 1.0 and less than 3.0
- Table 4 The steel types shown in Table 3 below were tested under the conditions shown in Table 4 below.
- “case” means a combination of the solidified state of the slab at the large reduction position shown in Table 1 above and the presence or absence of reduction.
- Table 4 also shows the slab reduction amount and casting speed of each large diameter reduction roll. The slab reduction amount was calculated from the difference between the roll interval of each large diameter reduction roll and the roll interval of the support roll adjacent to the upstream side of the large diameter reduction roll in the casting direction.
- Table 4 above shows the slab quality index and slab quality evaluation together with the test conditions.
- the slab quality index was obtained by using the slab of Comparative Example 1 as a base material.
- Comparative Example 1 neither the first large diameter reduction roll nor the second large diameter reduction roll was used for the reduction of the cast slab (Case 1).
- Example 1 of the present invention both of the two-stage large diameter reduction rolls were used for reduction of the slab. While the casting speed was kept constant at 0.80 m / min, unsolidified pressure was reduced with the first large diameter reduction roll, and post-solidification reduction was performed with the second large diameter reduction roll (Case 2). As a result, the slab quality index was 3.2, and a slab having excellent internal quality could be obtained.
- Example 1 of the present invention the solidification completion position was moved upstream in the casting direction due to a decrease in the casting speed, and the reduction by the first large-diameter reduction roll became the end-of-solidification reduction (Case 3). Accordingly, the amount of reduction of the first large diameter reduction roll was reduced from 32 mm to 12 mm. Even after the casting speed is reduced to 0.58 m / min, both of the two large diameter reduction rolls are used to reduce the slab, the first large diameter reduction roll is used to reduce the solidification end stage pressure, and the second large diameter reduction roll. After coagulation with a reduction roll, reduction was performed (Case 3). As a result, the slab quality index was the maximum level of 3.8. Even when the casting speed was lowered, a slab having excellent internal quality could be obtained.
- Example 2 of the present invention only the second large-diameter rolling roll of the two-stage large-diameter rolling rolls was used for slab reduction, and the casting speed was kept constant at 0.80 m / min. Reduction was performed (Case 4). As a result, the slab quality index was as good as 1.7.
- Example 3 of the present invention both of the two-stage large diameter reduction rolls were used for reduction of the slab. While the casting speed was kept constant at 0.58 m / min, the final coagulation end pressure was reduced with the first large diameter reduction roll, and the post-solidification reduction was performed with the second large diameter reduction roll (Case 6). As a result, the slab internal quality index was 3.8, and a slab excellent in internal quality could be obtained.
- the solidification completion position was moved downstream in the casting direction due to an increase in the casting speed, and the reduction by the first large-diameter reduction roll became the unsolidification reduction (Case 7). Accordingly, the amount of reduction of the first large diameter reduction roll increased from 12 mm to 32 mm. Even after the casting speed is increased to 0.80 m / min, both of the two large diameter reduction rolls are used for slab reduction, the first large diameter reduction roll is unsolidified and the second large diameter reduction roll is used. Crushing was performed after solidification with a rolling roll (Case 7). As a result, the slab quality index was 3.2. Even when the casting speed was increased, a slab having excellent internal quality could be obtained.
- Example 4 of the present invention only the first large-diameter rolling roll of the two-stage large-diameter rolling rolls was used for slab reduction, and the casting speed was kept constant at 0.58 m / min. Reduction was performed (Case 8). As a result, the slab quality index was as good as 2.5.
- the solidification completion position was moved downstream in the casting direction due to an increase in casting speed. After the casting speed increased to 0.80 m / min, only the second large diameter reduction roll was used to reduce the slab, and the end-solidification reduction was performed (case 9). The amount of reduction was the same 12 mm in case 8 and case 9. As a result, the slab quality index was 1.7. Even when the casting speed was increased, a slab having excellent internal quality could be obtained.
- a slab having good internal quality can be obtained even if the casting speed fluctuates. Therefore, even when casting slabs of different materials and uses with the same continuous casting machine, slabs with good internal quality can be obtained. Moreover, since the large diameter reduction roll arrange
Abstract
Description
図1は、本発明の鋳片の連続鋳造方法を適用できる連続鋳造機10の構成を示す図であり、鋳片を圧下しない状態を示している。鋳型1内に溶鋼湯面(メニスカス)2を形成するように注入された溶鋼3は、鋳型1およびその下方の図示しない二次冷却スプレーノズル群から噴射されるスプレー水(二次冷却水)により冷却され、凝固シェル4を形成して鋳片5となる。鋳片5は、その内部に未凝固の溶鋼3を保持したまま引き抜かれ、複数対の大径圧下ロール6により適宜圧下される。大径圧下ロール6により圧下された鋳片5は、さらに大径圧下ロール6間および大径圧下ロール6よりも鋳造方向下流側に配置されたサポートロール7を経て、図示しないピンチロールによって引き抜かれる。図1には、鋳造方向を矢印で示した。
本発明の鋳片の連続鋳造方法では、鋳造方向に沿って連続鋳造機10内に配置した2段の大径圧下ロール6を用いて鋳片5を圧下する。大径圧下ロール6は、直径が、それぞれ圧下直前の鋳片5の厚さの1.2~2.0倍である、大径の圧下ロールとする。ここでは、大径圧下ロールを用いて鋳片を圧下することを「大圧下」と称する。
(1)連続鋳造機10を用いて、鋳片5を大径圧下ロール6で圧下しながら連続鋳造する際に、ケース2で鋳片5を圧下しつつ一定の鋳造速度で鋳片5を鋳造する状態から鋳造速度を低減したときに、鋳造速度の低減に起因して鋳片5の凝固完了位置が鋳造方向の上流側へ移動するのに伴って、鋳片5の圧下形態をケース2からケース3へと切り替える、鋳片の連続鋳造方法。
(2)連続鋳造機10を用いて、鋳片5を大径圧下ロール6で圧下しながら連続鋳造する際に、ケース4で鋳片5を圧下しつつ一定の鋳造速度で鋳片を鋳造する状態から鋳造速度を低減したときに、鋳造速度の低減に起因して鋳片5の凝固完了位置が鋳造方向の上流側へ移動するのに伴って、第1の大径圧下ロール6aの圧下量が、ケース4における第2の大径圧下ロール6bの圧下量と同じになる鋳造速度で、鋳片5の圧下形態をケース4からケース5へと切り替える、鋳片の連続鋳造方法。
本発明の鋳片の連続鋳造方法では、図2の形態で連続鋳造を実施する際に、第1の大径圧下ロール6aにより、鋳片5の未凝固部分であって中心固相率が0.2以下の部分を5~30mm圧下し、第2の大径圧下ロール6bにより、鋳片5の凝固後部分を1~15mm圧下することが好ましい。
本発明の鋳片の連続鋳造方法では、図3の形態で連続鋳造を実施する際に、第1の大径圧下ロール6aにより、鋳片5の凝固末期部分を5~20mm圧下し、第2の大径圧下ロール6bにより、鋳片5の凝固後部分を1~15mm圧下することが好ましい。
Vp=1/ρ-1/ρ0 …(1)
ここで、Vp(cm3/g):中心ポロシティ体積、ρ(g/cm3):鋳片の厚さ中心の平均比重、ρ0(g/cm3):鋳片の1/4厚さ位置の平均比重である。
◎(優良):鋳片内質指数が3.0を超えて大きい
○(良) :鋳片内質指数が1.0を超え3.0未満である
5:鋳片、 6:大径圧下ロール、 6a:第1の大径圧下ロール、
6b:第2の大径圧下ロール、 7:サポートロール、 10:連続鋳造機
Claims (4)
- 鋳造方向に沿って2段配置された、直径がそれぞれ圧下直前の鋳片の厚さの1.2~2.0倍である一対の圧下ロールと、各段の前記圧下ロール同士の間に配置されたサポートロールとを備えた連続鋳造機を用いて、鋳片を前記圧下ロールによって圧下しながら連続鋳造する鋳片の連続鋳造方法であって、
1段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が0.8未満である未凝固部分の圧下と、前記1段目の圧下ロールよりも前記鋳造方向の下流側に配置された2段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が1.0である凝固後部分の圧下との組み合わせで、一定の鋳造速度で前記鋳片を鋳造する状態から鋳造速度を低減したとき、該鋳造速度の低減に起因して前記鋳片の凝固完了位置が前記鋳造方向の上流側へ移動するのに伴って、前記組み合わせから、前記1段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が0.8以上、1.0未満である凝固末期部分の圧下と、前記2段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が1.0である凝固後部分の圧下との組み合わせへと切り替えることを特徴とする、鋳片の連続鋳造方法。 - 鋳造方向に沿って2段配置された、直径がそれぞれ圧下直前の鋳片の厚さの1.2~2.0倍である一対の圧下ロールと、各段の前記圧下ロール同士の間に配置されたサポートロールとを備えた連続鋳造機を用いて、鋳片を前記圧下ロールによって圧下しながら連続鋳造する鋳片の連続鋳造方法であって、
2段目の圧下ロールによって前記鋳片の圧下を行いつつ一定の鋳造速度で前記鋳片を鋳造する状態から鋳造速度を低減したとき、該鋳造速度の低減に起因して前記鋳片の凝固完了位置が鋳造方向上流側に移動するのに伴って、前記鋳片の圧下に用いる前記2段目の圧下ロールの圧下量と、前記2段目の圧下ロールよりも前記鋳造方向の上流側に配置された1段目の圧下ロールの圧下量とが同じになる鋳造速度で、前記2段目の圧下ロールによる圧下から前記1段目の圧下ロールの圧下へと切り替えることを特徴とする、鋳片の連続鋳造方法。 - 鋳造方向に沿って2段配置された、直径がそれぞれ圧下直前の鋳片の厚さの1.2~2.0倍である一対の圧下ロールと、各段の前記圧下ロール同士の間に配置されたサポートロールとを備えた連続鋳造機を用いて、鋳片を前記圧下ロールによって圧下しながら連続鋳造する鋳片の連続鋳造方法であって、
1段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が0.8以上、1.0未満である凝固末期部分の圧下と、前記1段目の圧下ロールよりも前記鋳造方向の下流側に配置された2段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が1.0である凝固後部分の圧下との組み合わせで、一定の鋳造速度で前記鋳片を鋳造する状態から鋳造速度を増加したとき、該鋳造速度の増加に起因して前記鋳片の凝固完了位置が前記鋳造方向の下流側へ移動するのに伴って、前記組み合わせから、前記1段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が0.8未満である未凝固部分の圧下と、前記2段目の圧下ロールによる前記鋳片の厚み方向中心の固相率が1.0である凝固後部分の圧下との組み合わせへと切り替えることを特徴とする、鋳片の連続鋳造方法。 - 鋳造方向に沿って2段配置された、直径がそれぞれ圧下直前の鋳片の厚さの1.2~2.0倍である一対の圧下ロールと、各段の前記圧下ロール同士の間に配置されたサポートロールとを備えた連続鋳造機を用いて、鋳片を前記圧下ロールによって圧下しながら連続鋳造する鋳片の連続鋳造方法であって、
1段目の圧下ロールによって前記鋳片の圧下を行いつつ一定の鋳造速度で前記鋳片を鋳造する状態から鋳造速度を増加したとき、該鋳造速度の増加に起因して前記鋳片の凝固完了位置が鋳造方向下流側に移動するのに伴って、前記鋳片の圧下に用いる前記1段目の圧下ロールの圧下量と、前記1段目の圧下ロールよりも前記鋳造方向の下流側に配置された2段目の圧下ロールの圧下量とが同じになる鋳造速度で、前記1段目の圧下ロールによる圧下から前記2段目の圧下ロールの圧下へと切り替えることを特徴とする、鋳片の連続鋳造方法。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017532202A (ja) * | 2014-07-09 | 2017-11-02 | 北京科技大学 | 連続鋳造スラブ凝固端を高圧圧下した連続鋳造機扇状セグメント及びその高圧圧下方法 |
JP2018114514A (ja) * | 2017-01-17 | 2018-07-26 | 新日鐵住金株式会社 | 鋼の連続鋳造方法 |
JP2019155393A (ja) * | 2018-03-09 | 2019-09-19 | 日本製鉄株式会社 | 連続鋳造方法、及び連続鋳造機 |
JP2020006398A (ja) * | 2018-07-06 | 2020-01-16 | 日本製鉄株式会社 | 連続鋳造の圧下方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102164125B1 (ko) | 2018-11-23 | 2020-10-12 | 주식회사 포스코 | 주조 몰드 장치 및 이를 이용한 연속 주조 방법 |
CN110479977B (zh) * | 2019-09-06 | 2021-07-23 | 首钢集团有限公司 | 一种压下方法及装置 |
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CN114669723A (zh) * | 2022-03-21 | 2022-06-28 | 江阴兴澄特种钢铁有限公司 | 一种铸坯有效压下区间的控制方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03124352A (ja) * | 1989-10-09 | 1991-05-27 | Kobe Steel Ltd | 内部品質に優れた連続鋳造鋳片の製造方法 |
JP2002066704A (ja) * | 2000-08-22 | 2002-03-05 | Nkk Corp | 連続鋳造鋳片の凝固完了位置検出方法及び制御方法 |
JP2004009092A (ja) * | 2002-06-06 | 2004-01-15 | Sumitomo Metal Ind Ltd | 連続鋳造方法 |
US6880616B1 (en) * | 1999-07-07 | 2005-04-19 | Siemens Aktiengesellschaft | Method and device for making a metal strand |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4813817B1 (ja) | 1963-04-22 | 1973-05-01 | ||
JPS55106601A (en) | 1979-01-11 | 1980-08-15 | Nippon Kokan Kk <Nkk> | Manufacture of slab for thick steel plate by continuous casting |
JPS5941829B2 (ja) * | 1980-07-03 | 1984-10-09 | 新日本製鐵株式会社 | 鋼の連続鋳造方法 |
JPH0741388B2 (ja) | 1990-05-31 | 1995-05-10 | 株式会社神戸製鋼所 | 内部品質に優れた連続鋳造鋳片の製造方法 |
US5280547A (en) | 1990-06-08 | 1994-01-18 | Xerox Corporation | Dense aggregative hierarhical techniques for data analysis |
JP3124352B2 (ja) * | 1992-01-31 | 2001-01-15 | 日立ビアメカニクス株式会社 | 軸受予圧装置の外輪間座 |
JPH05228598A (ja) * | 1992-02-20 | 1993-09-07 | Kobe Steel Ltd | 内部品質に優れた連続鋳造鋳片の製造方法 |
CN1048203C (zh) * | 1995-06-22 | 2000-01-12 | 住友金属工业株式会社 | 薄铸片的连续铸造方法 |
US6102101A (en) * | 1995-10-18 | 2000-08-15 | Sumitomo Metal Industries, Ltd. | Continuous casting method and apparatus thereof |
DE19817034A1 (de) * | 1998-04-17 | 1999-10-21 | Schloemann Siemag Ag | Verfahren und Vorrichtung zum Stranggießen von dünnen Metallbändern |
DE19921296A1 (de) | 1999-05-07 | 2000-11-09 | Sms Demag Ag | Verfahren und Vorrichtung zum Herstellen von stranggegossenen Stahlerzeugnissen |
DE10042079A1 (de) * | 2000-08-26 | 2002-04-25 | Sms Demag Ag | Stranggießanlage mit Soft-Reduction-Strecke |
JP4218383B2 (ja) * | 2002-04-08 | 2009-02-04 | 住友金属工業株式会社 | 連続鋳造方法、連続鋳造装置および連続鋳造鋳片 |
JP4296985B2 (ja) | 2004-04-22 | 2009-07-15 | 住友金属工業株式会社 | 内質に優れた極厚鋼板とその製造方法 |
JP4813817B2 (ja) | 2005-04-11 | 2011-11-09 | 株式会社神戸製鋼所 | 鋼材の製造方法 |
JP4830612B2 (ja) | 2006-04-28 | 2011-12-07 | 住友金属工業株式会社 | 極厚鋼板用鋳片の連続鋳造方法 |
CN101868314B (zh) * | 2007-11-19 | 2015-04-22 | Posco公司 | 连铸坯及其制造方法 |
JP5228598B2 (ja) * | 2008-04-22 | 2013-07-03 | ヤマハ株式会社 | 車体構造体 |
JP5415373B2 (ja) | 2010-07-20 | 2014-02-12 | 株式会社沖データ | 画像形成装置 |
PL2543454T3 (pl) * | 2011-07-08 | 2020-02-28 | Primetals Technologies Germany Gmbh | Sposób i urządzenie do wytwarzania długich wyrobów stalowych w odlewaniu ciągłym |
JP5545419B1 (ja) * | 2012-08-22 | 2014-07-09 | 新日鐵住金株式会社 | 鋼の連続鋳造方法及び条鋼の製造方法 |
-
2015
- 2015-05-12 WO PCT/JP2015/063585 patent/WO2015174395A1/ja active Application Filing
- 2015-05-12 CN CN201580020269.9A patent/CN106232263B/zh active Active
- 2015-05-12 JP JP2016519257A patent/JP6252674B2/ja active Active
- 2015-05-12 US US15/307,854 patent/US10076783B2/en active Active
- 2015-05-12 CA CA2947828A patent/CA2947828C/en not_active Expired - Fee Related
- 2015-05-12 EP EP19176566.8A patent/EP3549695A1/en not_active Withdrawn
- 2015-05-12 EP EP15792491.1A patent/EP3144080B1/en active Active
- 2015-05-12 KR KR1020167030612A patent/KR101892838B1/ko active IP Right Grant
-
2018
- 2018-07-17 US US16/037,008 patent/US10183325B2/en active Active
- 2018-07-17 US US16/036,998 patent/US10207316B2/en active Active
- 2018-07-17 US US16/037,004 patent/US10189077B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03124352A (ja) * | 1989-10-09 | 1991-05-27 | Kobe Steel Ltd | 内部品質に優れた連続鋳造鋳片の製造方法 |
US6880616B1 (en) * | 1999-07-07 | 2005-04-19 | Siemens Aktiengesellschaft | Method and device for making a metal strand |
JP2002066704A (ja) * | 2000-08-22 | 2002-03-05 | Nkk Corp | 連続鋳造鋳片の凝固完了位置検出方法及び制御方法 |
JP2004009092A (ja) * | 2002-06-06 | 2004-01-15 | Sumitomo Metal Ind Ltd | 連続鋳造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3144080A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017532202A (ja) * | 2014-07-09 | 2017-11-02 | 北京科技大学 | 連続鋳造スラブ凝固端を高圧圧下した連続鋳造機扇状セグメント及びその高圧圧下方法 |
JP2018114514A (ja) * | 2017-01-17 | 2018-07-26 | 新日鐵住金株式会社 | 鋼の連続鋳造方法 |
JP2019155393A (ja) * | 2018-03-09 | 2019-09-19 | 日本製鉄株式会社 | 連続鋳造方法、及び連続鋳造機 |
JP7124353B2 (ja) | 2018-03-09 | 2022-08-24 | 日本製鉄株式会社 | 連続鋳造方法、及び連続鋳造機 |
JP2020006398A (ja) * | 2018-07-06 | 2020-01-16 | 日本製鉄株式会社 | 連続鋳造の圧下方法 |
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CA2947828A1 (en) | 2015-11-19 |
US20180318916A1 (en) | 2018-11-08 |
CN106232263B (zh) | 2019-01-18 |
KR101892838B1 (ko) | 2018-08-28 |
EP3549695A1 (en) | 2019-10-09 |
JP6252674B2 (ja) | 2017-12-27 |
EP3144080A4 (en) | 2017-11-15 |
US20180318914A1 (en) | 2018-11-08 |
US10183325B2 (en) | 2019-01-22 |
US10076783B2 (en) | 2018-09-18 |
EP3144080A1 (en) | 2017-03-22 |
US10189077B2 (en) | 2019-01-29 |
KR20160143721A (ko) | 2016-12-14 |
CN106232263A (zh) | 2016-12-14 |
US20180318915A1 (en) | 2018-11-08 |
JPWO2015174395A1 (ja) | 2017-04-20 |
CA2947828C (en) | 2019-01-15 |
US10207316B2 (en) | 2019-02-19 |
EP3144080B1 (en) | 2020-02-05 |
US20170050239A1 (en) | 2017-02-23 |
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