EP1980345A1 - Procede de production d'une piece en acier coulee en continu et systeme destine au traitement d'un defaut de surface d'une piece coulee - Google Patents
Procede de production d'une piece en acier coulee en continu et systeme destine au traitement d'un defaut de surface d'une piece coulee Download PDFInfo
- Publication number
- EP1980345A1 EP1980345A1 EP07737461A EP07737461A EP1980345A1 EP 1980345 A1 EP1980345 A1 EP 1980345A1 EP 07737461 A EP07737461 A EP 07737461A EP 07737461 A EP07737461 A EP 07737461A EP 1980345 A1 EP1980345 A1 EP 1980345A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slabs
- defects
- surface layer
- conditioning
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007547 defect Effects 0.000 title claims abstract description 311
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 79
- 239000010959 steel Substances 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title description 13
- 239000002344 surface layer Substances 0.000 claims abstract description 185
- 230000003750 conditioning effect Effects 0.000 claims abstract description 104
- 238000000034 method Methods 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000009749 continuous casting Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims description 54
- 238000004364 calculation method Methods 0.000 claims description 11
- 239000002436 steel type Substances 0.000 claims description 11
- 230000004907 flux Effects 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 19
- 206010039509 Scab Diseases 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 8
- 238000005098 hot rolling Methods 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 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
- B22D11/16—Controlling or regulating processes or operations
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- 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
- 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
Definitions
- the present invention relates to a method of producing a continuous casting slab of steel, and, more particularly, to an improvement in a surface conditioning technique of a continuous casting slab, which is a material, for obtaining a rolled sheet having good surface quality.
- slab One important quality that is required of a continuous casting slab (hereunder simply referred to as "slab") that is produced by a continuous casting method of steel is that defects, such as inclusions of surface layers of slabs, are rarely produced. However, it is actually difficult to completely eliminate surface layer defects. Therefore, in steel sheets in which surface defects should not occur to the extent possible, an overall surface conditioning is widely performed on the slabs, which are materials.
- the surface conditioning of slabs is often performed by, for example, partial scarfing or overall scarfing using a oxygen torch, or partial grinding or overall grinding using a grinder.
- partial scarfing or overall scarfing using a oxygen torch or partial grinding or overall grinding using a grinder.
- the defects are removed by further performing partial scarfing using an oxygen torch or partial grinding using a grinder.
- the surface conditioning operations using these methods can be used to remove defects up to a certain depth of a slab
- the surface conditioning operations cannot be used to remove defects that are deeper than the certain depth. Therefore, for example, a defect in the slab remaining directly below a scarfed surface or a ground surface may become a surface defect of a thin sheet after the slab is rolled into the thin sheet. Consequently, even if the surface conditioning of the slab is performed, the occurrence of the surface defect in the rolled sheet, which is a product, cannot be prevented completely.
- an attempt is made to remove a deep defect at a slab stage even a flawless portion around the defect is removed, thereby increasing a decrease in yield ratio or increasing the conditioning work time.
- Japanese Unexamined Patent Application Publication No. 02-15806 proposes a method of producing a stainless steel sheet that does not have scabs.
- the technology discussed in Japanese Unexamined Patent Application Publication No. 02-15806 corresponds to a method of producing a stainless steel sheet which is subjected to hot rolling.
- pinholes existing at at least portions near front and rear surfaces of side faces of slabs and existing in the front and rear surfaces of the slabs are detected, after which the portions pinholes having a diameter greater than or equal to 0.2 mm among the detected pinholes are conditioned and removed.
- Japanese Unexamined Patent Application Publication No. 10-296306 proposes a method of producing a hot-rolled steel sheet.
- pinholes in a slab prior to rough rolling are detected.
- the depths of the pinholes from a slab surface, the slab thickness, and the finish rolling thickness are estimated.
- conditioning is performed at a sheet bar stage or a slab stage prior to the finish rolling.
- an artificial flaw is previously provided in a slab to perform a rolling test.
- the depth from a slab surface and the size of pinholes that become surface flaws after the rolling, and rolling reduction are formulated as parameters. Based on this, the sizes of the pinholes to be removed prior to the rolling are determined.
- pinholes that are formed at deep positions from the slab surface are ground after rough rolling because the grinding amount of the slab at the slab stage is large, thereby decreasing yield ratio.
- the sizes of pinholes to be removed are estimated on the basis of the result of a rolling test of artificial flaw.
- the slabs according to the present invention are for ordinary steel sheets.
- surface layer defects which cause surface detects, include, in addition to pinholes, inclusions, formed of deoxidation products or mold powder, and cracks.
- the present invention can overcome such related art problems, and has as its object the provision of a method of producing a continuous casting slab of steel, which can restrict the occurrence of surface defects in a thin steel sheet (thin sheet), which is a product, so that the thin sheet (rolled product) has a required surface quality level.
- the present invention has as its object the provision of a conditioning system of surface layer defects of slabs, which can efficiently remove surface layer defects of slabs, which become surface defects of thin sheets (rolled products).
- the gist of the present invention is as follows.
- the inventors et al. have found out that, to obtain thin sheets 7 (rolled products) having a required surface quality level, it was important to efficiently and completely remove surface layer defects 5B of slabs 1, which become surface defects 6 of the thin sheets 7 (rolled products), which are products. To achieve this, the inventor et al.
- means 12 of measuring surface layer defects of slabs (surface layer defects measuring device) of an ultrasonic reflection type defects measuring device was used to measure the size (diameter of the equivalent circle) and three-dimensional positions (position in a lengthwise direction of the slabs, position in the widthwise direction of the slabs, and a position from the slab surfaces) of the surface layer defects 5 of the slabs 1 (primarily inclusions). Then, the measured values were stored in a storage means so as to be retrievable.
- Fig. 5 stored surface layer defects data 5A of the slabs 1 and surface defects data 6A of the steel sheets 7, which are materials of the slabs, were extracted, and compared and checked (9A) to confirm the state of correspondence between the surface layer defects 5 and the surface defects 6.
- the results of the relationships between the depth (three-dimensional position) of the surface layer defects 5 at the slabs and the size of the surface layer defects are shown in Fig. 5 .
- the symbol ⁇ stands for surface layer defects 5 that were not detected as surface defects 6 of the steel sheets 7; and the symbol ⁇ stands for surface layer defects 5 that were detected as the surface defects 6 of the steel sheets.
- Fig. 5 the same scabs level ranges of the surface defects 6 were divided. From Fig. 5 , it can be understood that boundary lines between the ⁇ and ⁇ , or division lines of the scab levels can be used as the features (three-dimension positions, sizes) of the surface layer defects 5B of the slabs to be removed.
- the inventor et al. have conceived that setting the features of the surface layer defects 5 of the slabs, which become the surface defects 6 of such products, as predetermined conditioning standards in accordance with a surface quality demand degree of the products (steel sheets), indicating the surface layer defects 5B to be removed, and removing the matched surface layer defects 5 of the slabs at the slab stage can effectively and considerably reduce the occurrence of the surface defects 6 (scabs) of the products.
- the present invention since the surface layer defects 5, which cause the surface defects of the products (steel sheets 7), can be efficiently removed, the present invention is industrially considerably effective in making it possible to considerably reduce frequency of surface defects of the products and of considerably improving manufacturing yield ratio.
- it is not necessary to perform overall scarfing and grinding conditioning of the entire slabs, so that the present invention is also effective in making it possible to easily and efficiently produce products required to satisfy strict surface quality level.
- the present invention makes it possible to efficiently remove all inclusions, which become scabs of the products, without a decrease in yield ratio caused by excessive conditioning or without any scabs remaining due to insufficient conditioning in overall conditioning to a certain thickness.
- a method of producing a slab according to the present invention includes a continuous casting process 2, in which molten steel is continuously casted into slabs, and a conditioning process 4 of slabs 1, in which the slabs 1 are conditioned after the continuous casting process 2.
- the means 12 of measuring surface layer defects of the slabs measures the surface layer defects of the slabs 1, to extract the surface layer defects data 5A of the slabs. From the obtained results, the surface layer defects 5B that need to be removed are removed by the conditioning process 4 of the slabs. This procedure is schematically illustrated in Fig. 4 .
- the sizes (diameters of the equivalent circle) and the three-dimensional positions of the surface layer defects 5 of the slabs 1 to be measured are determined.
- Examples of the surface layer defects 5 of the slabs 1 are inclusions, blowholes, and cracks.
- conditioning places and depths of the slabs 1 become clear, so that conditioning is facilitated, and correspondences between the surface layer defects 5 and the occurrence of the surface defects of the steel sheets 7 after rolling can be easily made clear.
- the obtained surface layer defects data is, as the surface layer defects data 5A of the slabs 1, is stored in surface layer defects database 5C of the slabs so that it can be searched.
- Fig. 3 on the basis of predetermined conditioning standards 8, that is, by comparing data (5B'), which is indicated in the conditioning standards 8, of the surface layer defects 5B that need to be removed with the surface layer defects data 5A of the slabs 1, a determination is made as to whether or not the surface layer defects 5 of the slabs correspond to the surface layer defects 5B that need to be removed.
- the conditioning standards 8 it is desirable that the surface layer defects that need to be removed in accordance with steel type, sheet thickness, and process be classified (so that they can be indicated) so as to be searchable.
- Fig. 6 shows example conditioning standards 8. For example, in Fig.
- the slabs 1 having the surface layer defects 5 that are determined as corresponding to the surface layer defects 5B that need to be removed are immediately conveyed to the conditioning process 4 of the slabs, and are removed by means 11 of conditioning the slabs.
- Any means of conditioning the slabs may be used for the means 11 of conditioning the slabs as long as it is a device of a type that is connected to a process computer and that is automatically operated, and that can remove local defects. Accordingly, the means 11 is not particularly limited.
- Example means 11 may be those that perform scarfing using an oxygen torch or grinding using a grinder.
- the slabs 1 whose surface layer defects 5B that need to be removed in the slab conditioning process 4 have been removed, or the flawless slabs 1 whose surface layer defects 5B do not need to be removed are subjected to the following processes, that is, the hot rolling process 21 and the cold rolling process 22, or are further subjected to a surface treatment process 23, so that they are formed as the products 7 (steel sheets).
- the procedure is shown in Fig. 3 .
- a surface inspection process 24 in a surface inspection process 24, the products 7 (steel sheets) are inspected by the means 13 of measuring surface layer defects to determine whether or not surface defects 6 exist.
- the conditioning standards 8 need to be such that the data (5B') of the surface layer defects 5B that need to be removed in accordance with steel type, process, use, sheet thickness, etc., can be classified, searched, checked, indicated, and updated. As shown in Fig. 2 , it is desirable that it be predetermined by the following procedure.
- the means 12 of measuring the surface layer defects of the slabs is used to obtain the surface layer defects data 5A of the slabs that determines the sizes and the three-dimensional positions of the surface layer defects 6 of the slabs 1.
- the means 12 of measuring the surface layer defects of slabs any one of the following surface layer defects measuring devices, that is, an ultrasonic reflection type defects measuring device, a transmitting type defects measuring device using radiation such as X rays or ⁇ rays, and a leakage magnetic flux type defects measuring device, may be suitably used.
- the slabs 1 are subjected to the hot rolling process 21, the cold rolling process 22, or the surface treatment process 23 to form the steel sheets 7.
- the means 13 of measuring the surface layer defects of the steel sheets is used to determine the sizes (width, length) and two-dimensional positions of the surface defects 6 (surface scabs, etc.) of the steel sheets. Accordingly, the surface defects data 6A of the steel sheets obtained as the materials of the slabs is obtained. Examples of the surface defects 6 of the steel sheets may include scabs, sliver, and blisters.
- any one of the following surface defects measuring devices that is, a surface defects measuring device based on image data processing and online continuous photography of the surfaces of the steel sheets 7 (coils), and a leakage magnetic flux type measuring device, may be suitably used.
- the obtained surface defects data 6A is stored in the storage means of the database 5C of the surface layer defects of the slabs and database 6C of surface layer defects of the steel sheets so that it can be retrieved, searched, and checked. It is desirable that the surface layer defects data 5A of the slabs 1 and the surface defects data 6A of the steel sheets 7, which are the materials of the slabs 1 be constantly collected and accumulated online.
- the obtained surface layer defects data 5A of the slabs 1 and the surface defects data 6A of the steel sheets 7, which are the materials of the slabs 1, are compared with each other (9A), so that features regarding the sizes and the three-dimensional positions of the surface layer defects 5B of the slabs 1, which become the surface defects 6 of the steel sheets 7, are extracted (9B).
- This step is repeatedly performed on the plurality of slabs 1, to provide the conditioning standards 8 in which the features (the sizes (diameters of the equivalent circle), three-dimensional positions) of the surface layer defects 5 of the slabs 1, which need to be removed in accordance with steel type, process, use, sheet thickness, etc., because they become the surface defects 6 of the steel sheets 7, can be classified, searched, checked, and indicated.
- the obtained conditioning standards 8 are stored in the storage means of conditioning standard database 14 so that it can be retrieved and updated.
- the features (the sizes (diameters of the equivalent circle), three-dimensional positions) of the surface layer defects 6 of the slabs 1, which become the surface defects 6 of the steel sheet products 7, can be extracted and indicated as the conditioning standards 8 in accordance with, for example, steel type, process, or use, or the sizes (widths, lengths) of the surface defects 6 (surface scabs) of the steel sheets 7.
- the surface layer defects data 5A of the slabs 1 and the surface defects data 6A of the steel sheets 7, which are the materials of the slabs 1, be constantly collected and accumulated online.
- the conditioning standards 8 to be updated periodically or non-periodically on the basis of latest data. This makes it possible to constantly possess the latest conditioning standards 8 in accordance with changes in, for example, casting conditions and rolling conditions.
- the surface layer defects conditioning system 10 of the slabs 1 used in the present invention comprises the means 12 of measuring surface layer defects of slabs, the means 13 of measuring surface defects of steel sheets, the means 15 of calculation, the means 11 of conditioning slabs, the database 5C of surface layer defects of slabs, the database 6C of surface defects of steel sheets, and the conditioning standard database 14.
- the surface layer defects conditioning system 10 of the slabs 1 is connected to, for example, a high-end process computer and a low-end process computer. It goes without saying that the surface layer defects conditioning system 10 of the slabs 1 is formed so as to allow input of information of, for example, use and process of the steel sheets, which are products, or of the history of, for example, manufacturing conditions and slab composition.
- the means 12 of measuring surface layer defects of slabs and the means 13 of measuring surface defects of steel sheets, and the means 11 of conditioning slabs 11 are connected to the means 15 of calculation.
- the database 5C of surface layer defects of slabs, the database 6C of surface defects of steel sheets, and the conditioning standard base 14 are also connected to the means 15 of calculation.
- the surface layer defects data 5A of the slabs regarding, for example, the three-dimensional positions and sizes of the surface layer defects 5 of the slabs 1 is measured.
- the surface defects data 6A regarding the sizes (widths, lengths) and the two-dimensional positions of the surface defects 6 of the steel sheets 7, obtained as materials of the slabs 1 is measured.
- the database 5C of the surface layer defects of the slabs is a database in which the obtained surface layer defects data 5A of the slabs 1 is stored so that it can be input and output along with process-related information such as manufacturing conditions and composition.
- the database 5C of the surface layer defects of the steel sheets is a database in which the surface defects data 6A of the steel sheets 7, obtained as the materials of the slabs 1, is stored so that it can be input and output along with process-related information such as processes and steel type.
- the conditioning standard database 14 is a database in which the surface layer defects that need to be removed in accordance with, for example, steel type, process, and use is stored so that it can be input and output as the surface layer defects data 5B that need to be determined, classified, and removed.
- the surface layer defects data 5A of the slabs 1, measured by the means 12 of measuring surface layer defects of slabs, and the surface layer defects data 5B', which need to be removed in accordance with, for example, steel type, process, and use and is output from the conditioning standard database 14, are input.
- they are compared (9A), to determine the surface layer defects 5B that need to be removed in the conditioning slabs.
- a signal 16 used to remove the surface layer defects 5B is output to the means 11 of conditioning slabs.
- the slabs 1 prior to the rolling operations using the means of measuring surface layer defects of slabs (surface layer defects measuring device) of an ultrasonic reflection type shown in Fig. 7 , the sizes and the three-dimensional positions (position in a lengthwise direction of the slabs, position in the widthwise direction of the slabs, and a depth from the front and back surfaces of the slabs) of the surface layer defects 5 (primarily inclusions) of the entire front and back surfaces of the slabs 1 (surface layer defects data 5A) were measured. Then, the surface layer defects data 5A was compared with the data 5A of the surface layer defects to be removed at a slab stage, the data 5A being indicated in the conditioning standards 8 output from the conditioning standard database 14 and used for the present purpose.
- a slab conditioning operation was performed to selectively remove the surface layer defects 5B that need to be removed by the means 11 of conditioning slabs (a grinder that can perform local conditioning).
- This corresponds to the example (number of coils 102) of the present invention.
- Some of the slabs 1 were subjected to overall grinding for a 2mm slab thickness. This corresponds to a comparative example (number of coils 98).
- the frequency of the surface defects in the example of the present invention was 0.1% on average. In contrast, in the comparative example, it was 1.0% on average.
- the present invention since the surface layer defects, which cause the surface defects of the products (steel sheets), can be efficiently removed, the present invention is industrially considerably effective in making it possible to considerably reduce frequency of surface defects of the products and of considerably improving manufacturing yield ratio.
- it is not necessary to perform overall scarfing and grinding conditioning of the entire slabs, so that the present invention is also effective in making it possible to easily and efficiently produce products required to satisfy strict surface quality level.
- the present invention makes it possible to efficiently remove all inclusions, which become scabs of the products, without a decrease in yield ratio caused by excessive conditioning or without any scabs remaining due to insufficient conditioning in overall conditioning to a certain thickness.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006044799A JP4816130B2 (ja) | 2006-02-22 | 2006-02-22 | 鋼の連続鋳造鋳片の製造方法および鋳片の表層欠陥手入システム。 |
PCT/JP2007/053701 WO2007099977A1 (fr) | 2006-02-22 | 2007-02-21 | Procede de production d'une piece en acier coulee en continu et systeme destine au traitement d'un defaut de surface d'une piece coulee |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1980345A1 true EP1980345A1 (fr) | 2008-10-15 |
EP1980345A4 EP1980345A4 (fr) | 2012-05-23 |
EP1980345B1 EP1980345B1 (fr) | 2013-05-22 |
Family
ID=38459080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07737461.9A Expired - Fee Related EP1980345B1 (fr) | 2006-02-22 | 2007-02-21 | Procede de production d'une piece en acier coulee en continu et systeme destine au traitement d'un defaut de surface d'une piece coulee |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1980345B1 (fr) |
JP (1) | JP4816130B2 (fr) |
KR (1) | KR101066333B1 (fr) |
CN (1) | CN101389428B (fr) |
WO (1) | WO2007099977A1 (fr) |
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EP3488948A1 (fr) * | 2017-11-24 | 2019-05-29 | SMS Group GmbH | Procédé d'analyse de causes de défaillance lors d'une coulée continue |
US10589327B2 (en) | 2014-05-12 | 2020-03-17 | Arconic Inc. | Apparatus and method for rolling metal |
WO2021058433A1 (fr) * | 2019-09-23 | 2021-04-01 | Sms Group Gmbh | Dispositif et procédé de fabrication et d'usinage ultérieur de brames |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2904951A1 (de) * | 1978-02-06 | 1981-05-21 | Ssab Svenskt Staal Ab, Stockholm | Verfahren und vorrichtung zur anzeige und entfernung von fehlern an metallischen brammen |
JPS57106855A (en) * | 1980-12-24 | 1982-07-02 | Nippon Steel Corp | Ultrasonic detection of flaw in ingot during continuous casting |
US6436205B1 (en) * | 1999-11-04 | 2002-08-20 | Sms Demag Ag | Method for surface processing of a continuously cast steel product and device therefor |
JP2002323481A (ja) * | 2001-04-27 | 2002-11-08 | Kawasaki Steel Corp | 超音波探傷方法および装置 |
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JP4259164B2 (ja) * | 2003-04-07 | 2009-04-30 | Jfeスチール株式会社 | 連続鋳造鋳片の品質監視装置及び品質監視方法 |
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2006
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- 2007-02-21 WO PCT/JP2007/053701 patent/WO2007099977A1/fr active Application Filing
- 2007-02-21 CN CN2007800061747A patent/CN101389428B/zh active Active
- 2007-02-21 EP EP07737461.9A patent/EP1980345B1/fr not_active Expired - Fee Related
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2904951A1 (de) * | 1978-02-06 | 1981-05-21 | Ssab Svenskt Staal Ab, Stockholm | Verfahren und vorrichtung zur anzeige und entfernung von fehlern an metallischen brammen |
JPS57106855A (en) * | 1980-12-24 | 1982-07-02 | Nippon Steel Corp | Ultrasonic detection of flaw in ingot during continuous casting |
US6436205B1 (en) * | 1999-11-04 | 2002-08-20 | Sms Demag Ag | Method for surface processing of a continuously cast steel product and device therefor |
JP2002323481A (ja) * | 2001-04-27 | 2002-11-08 | Kawasaki Steel Corp | 超音波探傷方法および装置 |
Non-Patent Citations (1)
Title |
---|
See also references of WO2007099977A1 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10589327B2 (en) | 2014-05-12 | 2020-03-17 | Arconic Inc. | Apparatus and method for rolling metal |
WO2018091572A1 (fr) * | 2016-11-18 | 2018-05-24 | Sms Group Gmbh | Procédé et dispositif de fabrication d'un matériau complexe sous forme de bande continue |
WO2018091562A1 (fr) * | 2016-11-18 | 2018-05-24 | Sms Group Gmbh | Procédé et dispositif de fabrication d'un matériau complexe sous forme de bande continue |
WO2018091571A1 (fr) * | 2016-11-18 | 2018-05-24 | Sms Group Gmbh | Procédé et dispositif de fabrication d'un matériau complexe sous forme de bande continue |
US11185943B2 (en) | 2016-11-18 | 2021-11-30 | Sms Group Gmbh | Method and device for producing a continuous strip-shaped composite material |
US11400542B2 (en) | 2016-11-18 | 2022-08-02 | Sms Group Gmbh | Method and device for producing a continuous strip-shaped composite material |
EP3488948A1 (fr) * | 2017-11-24 | 2019-05-29 | SMS Group GmbH | Procédé d'analyse de causes de défaillance lors d'une coulée continue |
WO2021058433A1 (fr) * | 2019-09-23 | 2021-04-01 | Sms Group Gmbh | Dispositif et procédé de fabrication et d'usinage ultérieur de brames |
EP3925729A1 (fr) * | 2020-06-16 | 2021-12-22 | ABB Schweiz AG | Procédé et agencement pour l'élimination de fissures |
WO2021254971A1 (fr) * | 2020-06-16 | 2021-12-23 | Abb Schweiz Ag | Procédé et système d'élimination de fissure |
Also Published As
Publication number | Publication date |
---|---|
KR20080089474A (ko) | 2008-10-06 |
CN101389428A (zh) | 2009-03-18 |
JP4816130B2 (ja) | 2011-11-16 |
KR101066333B1 (ko) | 2011-09-20 |
JP2007222884A (ja) | 2007-09-06 |
EP1980345B1 (fr) | 2013-05-22 |
EP1980345A4 (fr) | 2012-05-23 |
WO2007099977A1 (fr) | 2007-09-07 |
CN101389428B (zh) | 2011-09-07 |
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