EP0916414A1 - Verfahren zur Verbesserung der Oberflächenqualität einer stranggegossenen Bramme - Google Patents
Verfahren zur Verbesserung der Oberflächenqualität einer stranggegossenen Bramme Download PDFInfo
- Publication number
- EP0916414A1 EP0916414A1 EP98121250A EP98121250A EP0916414A1 EP 0916414 A1 EP0916414 A1 EP 0916414A1 EP 98121250 A EP98121250 A EP 98121250A EP 98121250 A EP98121250 A EP 98121250A EP 0916414 A1 EP0916414 A1 EP 0916414A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slab
- reactant
- descaling
- surface quality
- casting
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000376 reactant Substances 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 229910004709 CaSi Inorganic materials 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 238000007669 thermal treatment Methods 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 238000009736 wetting Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 5
- 239000000843 powder Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
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
- B21B1/46—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
-
- 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
-
- 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
- B21B2201/00—Special rolling modes
- B21B2201/14—Soft reduction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/45—Scale remover or preventor
Definitions
- the present invention relates to a method for improvement the surface quality of a continuously cast slab, in particular a thin slab with a maximum casting thickness of 100 mm, the Slab covered with a layer of pouring slag and a layer of scale is, the slab descaled after casting and in one Finishing mill is rolled.
- the object of the present invention is therefore a Process for improving the surface quality of a continuous cast Create slab using the streaks and streaks no longer occur or are at least significantly reduced, so that also for applications with high quality requirements as raw material Thin slabs can be used.
- the object is achieved in that the slab before descaling or a different one from water during descaling Reagent is applied.
- the application of the reactant can be a conventional hydraulic, mechanical or pneumatic removal of the scale layer lying on the slab go ahead.
- the only figure shows a thin slab caster with a downstream Finishing train.
- a slab is in a thin slab caster 1 2 cast with a casting thickness d.
- the casting thickness d is between 20 and 100 mm, e.g. 50 mm.
- the slab 2 After casting, the slab 2 by the guide rollers 3 of the vertical bent into the horizontal. After that, the slab 2 pre-rolled by roughing 4, e.g. from 50 mm to 35 mm.
- the Pre-rolling is preferably carried out before or immediately after solidification the slab 2.
- the liquid metal to be cast in the thin slab caster 1 does not adhere to it, is in the thin slab caster Casting powder used, which as a layer of slag between the mold wall and strand tray comes to rest.
- the pouring slag connects at the high casting temperatures with the surface of the pouring slab 2 and thus forms a slag film on the surface the slab 2.
- the slab 2 is made from nozzles 5 with a reactant 6 splashed, which is emulsified in the water glass.
- the Slab heated in a tunnel furnace 7 for about 20 to 30 minutes and then descaled 8 in the descaler.
- the finishing train 9 can of course more or less than four scaffolds, e.g. six or two.
- the detachability of the scale layer is due to the reactant 6 and the slag film considerably better than without the reactant 6. This makes these two layers almost descaling completely removed so that almost no streaks after rolling and streaks are more on the rolled strip.
- the Heating the slab 2 serves for melting near the surface Areas of the slab 2, thus represents a thermal treatment of the Slab 2.
- the descaling of the slab 2 takes place in the descaler 8 in a conventional manner, e.g. hydraulic, pneumatic and / or mechanically.
- metal powders can be used which contain at least one of the following metals: Si, Al, CaSi or CaAl.
- Non-metals such as carbon can also be used.
- Oxides are also suitable, for example CaO, SiO 2 , Al 2 O 3 , MgO, MnO, Na 2 O, FeO, Fe 2 O 3 or Fe 3 O 4 .
- the reactant 6 is in a concentration in the carrier substance up to 90% by volume available. Treatable per square meter Belt surface will be about 1 to 2 liters of the undiluted Reagent 6 required.
- the reactant 6 is not must be applied to the slab 2 in front of the tunnel furnace 7 got to.
- the reactant 6 could e.g. also only in tunnel kiln 7 or be applied to the slab 2 during descaling itself.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
Description
- 1
- Dünnbrammengießanlage
- 2
- Bramme
- 3
- Führungsrollen
- 4
- Vorwalzen
- 5
- Düsen
- 6
- Reaktionsmittel
- 7
- Tunnelofen
- 8
- Entzunderer
- 9
- Fertigstraße
- 10
- Haspel
- d
- Gießdicke
Claims (9)
- Verfahren zur Verbesserung der Oberflächenqualität einer stranggegossenen Bramme (2), insbesondere einer Dünnbramme (2) mit einer Gießdicke (d) von maximal 100 mm, wobei die Bramme (2) mit einem Gießschlackenfilm und einer Zunderschicht überzogen ist, wobei die Bramme (2) nach dem Gießen entzundert und in einer Fertigstraße (9) gewalzt wird,
dadurch gekennzeichnet,
daß auf die Bramme (2) vor dem Entzundern oder während des Entzunderns ein von Wasser verschiedenes Reaktionsmittel (6) aufgebracht wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß eine thermische Behandlung der Bramme (2), z.B. ein kurzzeitiges Aufheizen zum Aufschmelzen oberflächennaher Bereiche der Bramme (2), erfolgt. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Bramme (2) vor dem Benetzen mit dem Reaktionsmittel (6) und dem Entzundern vorgewalzt wird. - Verfahren nach Anspruch 3,
dadurch gekennzeichnet,
daß das Vorwalzen vor oder unmittelbar nach dem Durcherstarren der Bramme (2) erfolgt. - Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß das Entzundern hydraulisch, pneumatisch und/oder mechanisch erfolgt. - Verfahren nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß das Reaktionsmittel (6) mindestens ein Metall enthält, z.B. Si, Al, CaSi oder CaAl. - Verfahren nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß das Reaktionsmittel (6) mindestens ein Nichtmetall, z.B. Kohlenstoff, enthält. - Verfahren nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß das Reaktionsmittel (6) mindestens ein Oxid, insbesondere ein Metalloxid, enthält, z.B. CaO, SiO2, Al2O3, MgO, MnO, Na2O, FeO, Fe2O3 oder Fe3O4. - Verfahren nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß das Reaktionsmittel (6) mit einer Trägersubstanz gemischt ist, z.B. Wasser oder Wasserglas.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19750817 | 1997-11-17 | ||
DE19750817A DE19750817C2 (de) | 1997-11-17 | 1997-11-17 | Verfahren zur Verbesserung der Oberflächenqualität einer stranggegossenen Bramme |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0916414A1 true EP0916414A1 (de) | 1999-05-19 |
Family
ID=7848934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98121250A Withdrawn EP0916414A1 (de) | 1997-11-17 | 1998-11-07 | Verfahren zur Verbesserung der Oberflächenqualität einer stranggegossenen Bramme |
Country Status (7)
Country | Link |
---|---|
US (1) | US6216770B1 (de) |
EP (1) | EP0916414A1 (de) |
JP (1) | JPH11221610A (de) |
AR (1) | AR017631A1 (de) |
BR (1) | BR9806584A (de) |
CA (1) | CA2254153C (de) |
DE (1) | DE19750817C2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105492132A (zh) * | 2013-07-30 | 2016-04-13 | Sms集团有限公司 | 用于制造金属带材的连铸连轧设备 |
WO2019068444A1 (de) * | 2017-10-03 | 2019-04-11 | Primetals Technologies Austria GmbH | Verfahren zum betrieb einer giess-walz-verbundanlage und giess-walz-verbundanlage |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10137944A1 (de) * | 2001-08-07 | 2003-02-20 | Sms Demag Ag | Warmwalzanlage |
FR2833871B1 (fr) * | 2001-12-20 | 2004-07-09 | Usinor | Procede et installation de fabrication de bandes metalliques a partir de bandes coulees directement a partir de metal liquide |
DE10325955A1 (de) * | 2003-06-07 | 2004-12-23 | Sms Demag Ag | Verfahren und Anlage zum Erzeugen von Stahlprodukten mit bester Oberflächenqualität |
AT504782B1 (de) | 2005-11-09 | 2008-08-15 | Siemens Vai Metals Tech Gmbh | Verfahren zur herstellung eines warmgewalzten stahlbandes und kombinierte giess- und walzanlage zur durchführung des verfahrens |
CN103586432B (zh) * | 2013-11-14 | 2016-09-21 | 中冶连铸技术工程股份有限公司 | 一种连铸机辊列曲线设计方法 |
JP7256394B2 (ja) * | 2019-09-27 | 2023-04-12 | 日本製鉄株式会社 | 熱間加工システム及び熱間加工方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU39271A1 (de) * | 1959-11-24 | 1960-12-12 | ||
DE1107478B (de) * | 1954-09-02 | 1961-05-25 | Boehler & Co Ag Geb | Verfahren zum Entzundern und spanlosen Warmverformen von Blocken, Stranggusserzeugnissen oder Halbzeug aus Eisen oder Stahl in einem Arbeitsgang |
EP0453321A1 (de) * | 1990-04-20 | 1991-10-23 | Kawasaki Steel Corporation | Verfahren zum Entzundern warmgewalzter Bänder aus nichtrostendem Stahl |
DE19520832A1 (de) * | 1994-10-20 | 1996-04-25 | Mannesmann Ag | Verfahren und Vorrichtung zur Herstellung von Stahlband mit Kaltwalzeigenschaften |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1266101B (de) * | 1962-08-13 | 1968-04-11 | Erik Allan Olsson | Verfahren zur schuetzenden Oberflaechenbehandlung von Gussmaterial gegen Verzunderung und Entkohlung waehrend des Stranggiessens |
JPS535031A (en) * | 1976-07-05 | 1978-01-18 | Nippon Steel Corp | Method of fabricating coils of hot rolled stee plate excellent in property to be pickled |
JPS5458630A (en) * | 1977-10-20 | 1979-05-11 | Kobe Steel Ltd | Removing of cut sludge in vertical continuous casting machine |
JPS569001A (en) * | 1979-07-02 | 1981-01-29 | Kawasaki Steel Corp | Direct feed rolling method |
JPS5770019A (en) * | 1980-10-20 | 1982-04-30 | Mitsubishi Heavy Ind Ltd | Method for improving exfollation of scale on surface of hot rolled steel plate |
JPS5928578A (ja) * | 1982-08-10 | 1984-02-15 | Kawasaki Steel Corp | 鋼帯のデスケ−リング方法 |
JP2583366B2 (ja) * | 1991-07-11 | 1997-02-19 | 川崎製鉄株式会社 | ステンレス鋼帯の製造方法 |
JPH0525666A (ja) * | 1991-07-22 | 1993-02-02 | Kawasaki Steel Corp | オーステナイト系ステンレス鋼帯の製造方法 |
AT398396B (de) * | 1993-02-16 | 1994-11-25 | Voest Alpine Ind Anlagen | Verfahren zum herstellen eines bandes, vorstreifens oder einer bramme |
-
1997
- 1997-11-17 DE DE19750817A patent/DE19750817C2/de not_active Expired - Fee Related
-
1998
- 1998-11-06 US US09/187,270 patent/US6216770B1/en not_active Expired - Fee Related
- 1998-11-07 EP EP98121250A patent/EP0916414A1/de not_active Withdrawn
- 1998-11-16 BR BR9806584-0A patent/BR9806584A/pt not_active IP Right Cessation
- 1998-11-16 AR ARP980105797A patent/AR017631A1/es active IP Right Grant
- 1998-11-17 CA CA002254153A patent/CA2254153C/en not_active Expired - Fee Related
- 1998-11-17 JP JP10326596A patent/JPH11221610A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1107478B (de) * | 1954-09-02 | 1961-05-25 | Boehler & Co Ag Geb | Verfahren zum Entzundern und spanlosen Warmverformen von Blocken, Stranggusserzeugnissen oder Halbzeug aus Eisen oder Stahl in einem Arbeitsgang |
LU39271A1 (de) * | 1959-11-24 | 1960-12-12 | ||
EP0453321A1 (de) * | 1990-04-20 | 1991-10-23 | Kawasaki Steel Corporation | Verfahren zum Entzundern warmgewalzter Bänder aus nichtrostendem Stahl |
DE19520832A1 (de) * | 1994-10-20 | 1996-04-25 | Mannesmann Ag | Verfahren und Vorrichtung zur Herstellung von Stahlband mit Kaltwalzeigenschaften |
Non-Patent Citations (1)
Title |
---|
HENDRICKS C: "BANDGIESSTECHNIK - EINE REVOLUTION IN DER STAHLINDUSTRIE? STRIP CASTING TECHNOLOGY - A REVOLUTION IN THE STEEL INDUSTRY?", STAHL UND EISEN, vol. 115, no. 3, 15 March 1995 (1995-03-15), pages 75 - 81, 159, XP000498052 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105492132A (zh) * | 2013-07-30 | 2016-04-13 | Sms集团有限公司 | 用于制造金属带材的连铸连轧设备 |
WO2019068444A1 (de) * | 2017-10-03 | 2019-04-11 | Primetals Technologies Austria GmbH | Verfahren zum betrieb einer giess-walz-verbundanlage und giess-walz-verbundanlage |
Also Published As
Publication number | Publication date |
---|---|
AR017631A1 (es) | 2001-09-12 |
CA2254153C (en) | 2008-02-05 |
US6216770B1 (en) | 2001-04-17 |
DE19750817A1 (de) | 1999-06-02 |
JPH11221610A (ja) | 1999-08-17 |
CA2254153A1 (en) | 1999-05-17 |
BR9806584A (pt) | 2000-02-22 |
DE19750817C2 (de) | 2003-03-20 |
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Owner name: GFA SITE OFFICE CSP PLANT AT ACME Owner name: SMS DEMAG AG |
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18D | Application deemed to be withdrawn |
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