EP1989009B1 - Method for making low surface roughness cast strip - Google Patents

Method for making low surface roughness cast strip Download PDF

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Publication number
EP1989009B1
EP1989009B1 EP07701554.3A EP07701554A EP1989009B1 EP 1989009 B1 EP1989009 B1 EP 1989009B1 EP 07701554 A EP07701554 A EP 07701554A EP 1989009 B1 EP1989009 B1 EP 1989009B1
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EP
European Patent Office
Prior art keywords
rolls
strip
caster
thin cast
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.)
Active
Application number
EP07701554.3A
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German (de)
English (en)
French (fr)
Other versions
EP1989009A4 (en
EP1989009A1 (en
Inventor
Walter Blejde
Jay Jon Ondrovic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nucor Corp
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Nucor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to PL07701554T priority Critical patent/PL1989009T3/pl
Publication of EP1989009A1 publication Critical patent/EP1989009A1/en
Publication of EP1989009A4 publication Critical patent/EP1989009A4/en
Application granted granted Critical
Publication of EP1989009B1 publication Critical patent/EP1989009B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—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
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/14—Roughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally

Definitions

  • This invention relates to a method for making a cast strip.
  • a method for producing a thin cast steel strip is e.g. known from document US 5 901 777 A .
  • a cast strip obtained from a twin roll caster is rolled by an in- line rolling mill provided with working rolls to form a steel strip with a surface roughness not greater than 20 microns.
  • molten metal is introduced between a pair of counterrotated horizontal casting rolls which are cooled so that metal shells solidify on the moving roll surfaces, and are brought together at the nip between them to produce a solidified strip product delivered downwardly from the nip between the casting rolls.
  • nip is used herein to refer to the general region at which the casting rolls are closest together.
  • the molten metal may be poured from a ladle through a metal delivery system comprised of a tundish and a core nozzle located above the nip to form a casting pool of molten metal supported on the casting surfaces of the rolls above the nip and extending along the length of the nip.
  • This casting pool is usually confined between refractory side plates or dams held in sliding engagement with the end surfaces of the rolls so as to dam the two ends of the casting pool against outflow.
  • a sealed enclosure is provided beneath the casting rolls to receive the hot strip and through which the strip passes on the way from the strip caster, the enclosure containing an atmosphere which inhibits oxidation of the strip.
  • the oxidation inhibiting atmosphere may be created by injecting a non-oxidizing gas, for example, an inert gas such as argon or nitrogen, or combustion exhaust gases which may be reducing gases.
  • the enclosure may be sealed against ingress of oxygen containing atmosphere during operation of the strip caster. The oxygen content of the atmosphere within the enclosure is then reduced during an initial phase of casting by allowing oxidation of the strip to extract oxygen from the sealed enclosure as disclosed in United States Patents 5,762,126 and 5,960,855 .
  • FIG. 1 is a micrograph showing typical surface roughness of such cast and hot rolled strip emerging from a hot rolling mill in-line with a twin roll caster. With the direction of rolling from left to right, the micrograph shows pronounced lapping on the strip surface (20 to 30 ⁇ m deep).
  • the reason or reasons for this surface roughness may be shearing at the strip surface caused by welding of the strip to the work roll surface, imprinting of the texture of the work roll surface onto the surface of the strip, and/or other factors.
  • micro-cracking on the surface of the cast strip has been found to be a problem. It was possible to reduce microcracking by reducing the casting speed and the heat rate of the strip but it was uneconomical to reproduce these conditions during production.
  • microstructure of hot strip mill products is essentially 100% equiaxed ferrite.
  • microstructure was coarse grains of polygonal ferrite, acicular ferrite, and Widmanstatten. It was typical that the microstructure was 30-60% polygonal ferrite, 70-40 % Widmanstatten and acicular ferrite. With this microstructure, the typical surface roughness was 4-7 microns Ra.
  • the method can include shrouding the thin cast strip from the casting rolls through the hot rolling mill in an atmosphere of less than 5% oxygen and forming the thin cast strip having: at least one microstructure selected from the group consisting of polygonal ferrite, acicular ferrite, Widmanstatten, bainite and martinsite, a surface roughness of less than 1.5 microns Ra, and a scale thickness of less than 10 microns
  • the method can also include the step of assembling spray nozzles positioned adjacent the work rolls capable of providing the mixture of water and oil to the works rolls.
  • An alternative method comprises the step of: assembling spray nozzles positioned upstream of the work capable of spraying a mixture of water and oil to the back-up rolls.
  • the method of the invention preferably comprises spraying the mixture of oil and water as the cast strip enters the hot rolling mill.
  • the rate of spray by the nozzles may be between 10 and 30 gallons per minute.
  • the rolling temperature may below 1100C or below 1050°C or below 900oC.
  • the method can include shrouding the thin cast strip from the casting rolls through the hot rolling mill in an atmosphere of less than 5 % oxygen and forming the thin cast strip having: at least one microstructure selected from the group consisting of polygonal ferrite, acicular ferrite, Widmanstatten, bainite and martinsite, a surface roughness of less than 1.5 microns Ra, and a scale thickness of less than 10 microns.
  • the method of the invention preferably comprises spraying the mixture of oil and water as the cast strip enters the hot rolling mill.
  • the rate of spray by the nozzles may be between 10 and 30 gallons per minute.
  • the method may comprise producing the cast strip at a rate above 80 meters per minute.
  • the rolling temperature may below 1100C or below 1050° C or below 900° C.
  • the illustrated casting and rolling installation comprises a twin-roll caster denoted generally by 11 which produces thin cast steel strip 12 which passes into a transient path across a guide table 13 to a pinch roll stand 14.
  • thin cast strip 12 passes into and through hot rolling mill 15 comprised of back-up rolls 16 and upper and lower work rolls 16A and 16B, where the thickness of the strip reduced.
  • the strip 12, upon exiting the rolling mill 15, passes onto a run out table 17 where it may be forced cooled by water jets 18, and then through pinch roll stand 20 comprising a pair of pinch rolls 20A and to a coiler 19.
  • Twin-roll caster 11 comprises a main machine frame which supports a pair of laterally positioned casting rolls 22 having casting surfaces 22A and forming a nip between them.
  • Molten metal is supplied during a casting campaign from a ladle (not shown) to a tundish 23, through a refractory shroud to a removable tundish 25 (also called distributor vessel or transition piece), and then through a metal delivery nozzle 28 (also called a core nozzle) between the casting rolls 22 above the nip.
  • Molten steel is introduced into removable tundish 25 from tundish 23 via an outlet of the refractory shroud.
  • the tundish 23 is fitted with a stopper rod and a slide gate valve (not shown) to selectively open and close the outlet of the shroud and effectively control the flow of molten metal from the tundish 23 to the caster.
  • the molten metal flows from removable tundish 25 through an outlet and optionally to and through the delivery nozzle 28.
  • Molten metal thus delivered to the casting rolls 22 forms a casting pool above nip supported by casting roll surfaces 22A.
  • This casting pool is confined at the ends of the rolls by a pair of side dams or plates, which are applied to the ends of the rolls by a pair of thrusters (not shown) comprising hydraulic cylinder units connected to the side dams.
  • the upper surface of the casting pool (generally referred to as the "meniscus" level) may rise above the lower end of the delivery nozzle 28 so that the lower end of the deliver nozzle is immersed within the casting pool.
  • Casting rolls 22 are internally water cooled by coolant supply (not shown) and driven in counter rotational direction by drives (not shown) so that shells solidify on the moving casting roll surfaces and are brought together at the nip to produce the thin cast strip 12, which is delivered downwardly from the nip between the casting rolls.
  • the cast steel strip 12 passes within a sealed enclosure 10 to the guide table 13, which guides the strip to a pinch roll stand 14 through which it exits sealed enclosure 10.
  • the seal of the enclosure 10 may not be complete, but is appropriate to allow control of the atmosphere within the enclosure and access of oxygen to the cast strip within the enclosure as hereinafter described.
  • the strip After exiting the sealed enclosure 10, the strip may pass through further sealed enclosures after the pinch roll stand 14, including the hot rolling mill 15.
  • Enclosure 10 is formed by a number of separate wall sections that fit together at various seal connections to form a continuous enclosure wall. These sections comprise a first wall section 41 at the twin roll caster to enclose the casting rolls 22, and a wall enclosure 42 extending downwardly beneath first wall section 41 to form an opening that is in sealing engagement with the upper edges of a scrap box receptacle 40.
  • a seal 43 between the scrap box receptacle 40 and the enclosure wall 42 may be formed by a knife and sand seal around the opening in enclosure wall 42, which can be established and broken by vertical movement of the scrap box receptacle 40 relative to enclosure wall 42. Seal 43 is formed by raising the scrap box receptacle 40 to cause the knife flange to penetrate the sand in the channel to establish the seal.
  • This seal 43 can be broken by lowering the scrap box receptacle 40 from its operative position, preparatory to movement away from the caster to a scrap discharge position (not shown).
  • Scrap box receptacle 40 is mounted on a carriage 45 fitted with wheels 46 which run on rails 47, whereby the scrap box receptacle can be moved to the scrap discharge position.
  • Carriage 45 is fitted with a set of powered screw jacks 51 operable to lift the scrap box receptacle 40 from a lowered position, where it is spaced from the enclosure wall 42, to a raised position where the knife flange penetrates the sand to form seal 43 between the two.
  • Sealed enclosure 10 further may have a third wall section disposed 61 about the guide table 13and connected to the frame of pinch roll stand 14, which includes a pair of pinch rolls 50.
  • the third wall section disposed 61 of enclosure 10 is sealed by sliding seals.
  • enclosure wall sections 41, 42 and 61 may be lined with fire brick.
  • scrap box receptacle 40 may be lined either with fire brick or with a castable refractory lining.
  • the complete enclosure 10 is sealed prior to a casting operation, thereby limiting access of oxygen to thin cast strip 12, as it passes from the casting rolls 22 through the pinch roll stand 14 and the hot rolling mill 15.
  • the strip can take up all of the oxygen from enclosure 10 space by forming heavy scale on an initial section of the strip.
  • the sealing enclosure 10 limits ingress of oxygen into the enclosure from the surrounding atmosphere to below the amount of oxygen that could be taken up by the strip.
  • the oxygen content in the enclosure 10 will remain depleted so limiting the availability of oxygen for oxidation of the strip 12.
  • the formation of scale is controlled to a thickness less than 10 microns without the need to continuously feed a reducing or non-oxidizing gas into the enclosure.
  • a reducing or non-oxidizing gas may be fed through the enclosure walls.
  • the enclosure 10 can be purged immediately prior to the commencement of casting so as to reduce the initial oxygen level within enclosure 10, thereby reducing the time period for the oxygen level to stabilize in the enclosure as a result of the interaction of the oxygen in oxidizing the strip passing through it.
  • the enclosure may conveniently be purged with, for example, nitrogen gas. It has been found that reduction of the initial oxygen content to levels of between 5% will limit the scaling of the strip at the exit from the enclosure 10 to about 10 microns to 17 microns even during the initial start-up phase.
  • the thin cast steel strip has a scale thickness less than about 10 microns, or the scale thickness may be less than 7 or 4 microns, during continuous casting.
  • Apron 38 is then retracted back to its hanging position as shown in Figure 3 to allow the strip 12 to hang in a loop 36 beneath the caster as shown in Figures 2 and 3 before the strip passes onto the guide table 13.
  • the guide table 13 comprises a series of strip support rolls 37 to support the strip before it passes to the pinch roll stand 14.
  • the rolls 37 are disposed in an array extending from the pinch roll stand 14 backwardly beneath the caster and curve downwardly to smoothly receive and guide the strip from the loop 36.
  • the twin-roll caster may be of a kind which is illustrated and described in detail in United States Patent No. 5,184,668 and 5,277,243 , or United States Patent No. 5,488,988 . Reference may be made to these patents for construction details, which are no part of the present invention.
  • Pinch roll stand 14 comprises a pair of pinch rolls 50 reactive to tension applied by the hot rolling mill 15. Accordingly, the strip is able to hang in the loop 36 as it passes from the casting rolls 22 to the guide table 13 and into the pinch roll stand 14.
  • the pinch rolls 50 thus provides a tension barrier between the freely hanging loop and tension on the strip downstream of the processing line.
  • the pinch rolls 50 also stabilize the position of the strip on the feed table 13, feeding the strip into hot rolling mill 15.
  • the thin cast strip 12 is delivered to the hot rolling mill 15 comprised of upper work roll 16A and lower roll 16B.
  • a preferred embodiment of the present invention comprises spraying a mixture of water and oil on the downstream surfaces of back-up rolls 16.
  • An oil reservoir 100 is provided with a heater 101 to maintain the oil at approximately 50° C, but heating is not necessary.
  • the heated oil is transferred through oil transfer lines 103 by fixed displacement pumps 102 to static mixers 104 where the heated oil is mixed with water.
  • Water is supplied from a source 110 to water strip chilling headers 111 and to mill rolls supply lines 112. A first portion of the water is supplied to spray headers 18 to supply cooling water to cool the hot strip 12 after exiting the hot rolling mill 15. Typically, the water pressure is reduced through pressure regulator 113 to about 40 psi. Between about 10 and 30 gpm of water is supplied to each static mixer 104 where the water is mixed with about 4 gph of heated oil.
  • the mixed oil and water is then applied to the downstream surfaces (the direction of travel of the thin cast steel strip 12 is shown by arrow 120) of back-up rolls 16 through oil-water nozzles 71.
  • the oil-water mixture may be applied to cast strip 12 in the roll bite area, may be applied to the upstream surfaces of the back-up rolls 16 or to the work rolls 16A, 16B.
  • the temperature of the thin cast steel strip 12 in the hot rolling mill 15 is less than 1100° C, and more preferably less than 1050° C, and most preferably less than 900° C. Also, preferably, the temperature of the thin cast steel strip in the hot rolling mill 15 is above 400° C
  • the static mixers 104 are standard conventionally available devices. Other forms of mixers may be used provided they are capable of good mixing of the oil and water.
  • the oil-water mixture is delivered at between 5 and 30 gpm at 40 psi to the back-up rolls 16. Typically the oil-water mixture is delivered to the back up rolls in this embodiment at about 10 to 20 gpm, with 15 gpm a reasonable setting.
  • the oil-water mixture may comprise less than 5% oil, and in one embodiment comprises 4 parts oil and between 600 parts to 1800 parts water by volume. The oil may be less than 2% or 1% of the mixture.
  • the oil is provided to be mixed with the water generally at less than 15 gph.
  • Figure 5 shows the Average Surface Roughness (Ra) in microns for thin cast strip steel strip 12 produced using the present invention. As can be seen in Figure 5 , the Average Surface Roughness is noticeably lower, about 0.66 to about 1.5 microns with the addition of an oil-water mixture as described above.
  • the present invention comprises producing thin cast steel strip using the oil-water application described above to produce thin cast steel strip at a rate above 80 meters per minute.
EP07701554.3A 2006-02-27 2007-02-27 Method for making low surface roughness cast strip Active EP1989009B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07701554T PL1989009T3 (pl) 2006-02-27 2007-02-27 Sposób wytwarzania odlewanej taśmy o małej chropowatości powierzchni

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/362,682 US20070199627A1 (en) 2006-02-27 2006-02-27 Low surface roughness cast strip and method and apparatus for making the same
PCT/AU2007/000227 WO2007095695A1 (en) 2006-02-27 2007-02-27 Low surface roughness cast strip and method and apparatus for making the same

Publications (3)

Publication Number Publication Date
EP1989009A1 EP1989009A1 (en) 2008-11-12
EP1989009A4 EP1989009A4 (en) 2012-10-17
EP1989009B1 true EP1989009B1 (en) 2014-10-29

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Application Number Title Priority Date Filing Date
EP07701554.3A Active EP1989009B1 (en) 2006-02-27 2007-02-27 Method for making low surface roughness cast strip

Country Status (15)

Country Link
US (2) US20070199627A1 (ko)
EP (1) EP1989009B1 (ko)
JP (2) JP5764282B2 (ko)
KR (2) KR101446937B1 (ko)
CN (1) CN101432083B (ko)
AU (1) AU2007219065B2 (ko)
BR (1) BRPI0708328B1 (ko)
MA (1) MA30275B1 (ko)
MX (1) MX2008010670A (ko)
MY (1) MY157942A (ko)
NZ (1) NZ571431A (ko)
PL (1) PL1989009T3 (ko)
RU (1) RU2451566C2 (ko)
UA (1) UA94089C2 (ko)
WO (1) WO2007095695A1 (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10071416B2 (en) 2005-10-20 2018-09-11 Nucor Corporation High strength thin cast strip product and method for making the same
US20100215981A1 (en) * 2009-02-20 2010-08-26 Nucor Corporation Hot rolled thin cast strip product and method for making the same
US20110100970A1 (en) * 2009-11-03 2011-05-05 Lincoln Global, Inc. Manufacture of cored welding electrodes
DE102010036401B4 (de) 2010-07-14 2023-08-24 Vacuumschmelze Gmbh & Co. Kg Vorrichtung und Verfahren zum Herstellen eines metallischen Bands
US9156082B2 (en) 2013-06-04 2015-10-13 Nucor Corporation Method of continuously casting thin strip
MX2017008027A (es) * 2014-12-19 2017-10-20 Nucor Corp Hoja de acero martensitico de calibre liviano laminada en caliente y metodo para fabricarla.
CN107186184A (zh) * 2017-04-27 2017-09-22 酒泉钢铁(集团)有限责任公司 一种马氏体不锈钢双辊薄带铸轧生产工艺
CN107186185A (zh) * 2017-04-27 2017-09-22 酒泉钢铁(集团)有限责任公司 一种双相不锈钢双辊薄带铸轧生产工艺
CN112203781B (zh) * 2018-04-06 2023-10-31 纽科尔公司 薄金属带的高摩擦轧制
CN111151584A (zh) * 2019-12-30 2020-05-15 江苏沙钢集团有限公司 无需在线除鳞的生产高表面质量热轧带钢所需的新型热箱

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589470A (en) * 1981-12-04 1986-05-20 Electric Power Research Institute Inc. Method and apparatus for cooling a moving chill substrate
GB2156255A (en) * 1984-03-23 1985-10-09 Davy Mckee Rolling mill
SU1304947A1 (ru) * 1985-09-03 1987-04-23 Пермский политехнический институт Способ прокатки полосовых заготовок
US4793401A (en) * 1985-12-12 1988-12-27 Kawasaki Steel Corporation Method of producing thin steel sheets having an improved processability
EP0245722A3 (de) * 1986-05-13 1988-03-02 Concast Service Union Ag Verfahren zum Besprühen von Strängen
FR2612819A1 (fr) * 1987-03-23 1988-09-30 Fives Cail Babcock Dispositif pour soutenir et refroidir un produit de coulee continue a sa sortie de la lingotiere
ES2032620T3 (es) * 1987-04-13 1993-02-16 Thyssen Stahl Aktiengesellschaft Instalacion para la fabricacion de una cinta de acero con un espesor de 2 a 25 mm mediante conformado de una barra de acero fundido.
DE3713909A1 (de) * 1987-04-25 1988-11-10 Vaw Ver Aluminium Werke Ag Tiefziehfaehiges blech oder band aus aluminium oder aluminiumlegierungen sowie verfahren zu seiner herstellung
JPH02280904A (ja) * 1989-04-24 1990-11-16 Nippon Steel Corp 温間圧延方法
DE69126229T2 (de) 1990-04-04 1997-12-18 Ishikawajima Harima Heavy Ind Verfahren und Vorrichtung zum kontinuierlichen Bandgiessen
JP3007941B2 (ja) 1991-11-21 2000-02-14 石川島播磨重工業株式会社 金属ストリップ鋳造方法
AU646981B2 (en) 1991-11-21 1994-03-10 Ishikawajima-Harima Heavy Industries Company Limited Strip casting
IN181634B (ko) 1993-05-27 1998-08-01 Bhp Steel Jla Pty Ltd Ishikawa
EP0650790B2 (en) * 1993-10-29 2013-10-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for thermal surface treatment in a continuous casting machine
US5584337A (en) * 1994-03-25 1996-12-17 Nippon Steel Corporation Process for producing thin cast strip
BR9505870A (pt) * 1994-04-04 1996-02-21 Nippon Steel Corp Método e aparelho de fundição continua de cilindro duplo
JP3190319B2 (ja) * 1994-04-04 2001-07-23 新日本製鐵株式会社 双ロール式連続鋳造装置
AUPN101495A0 (en) * 1995-02-10 1995-03-09 Bhp Steel (Jla) Pty Limited Casting steel strip
AUPN176495A0 (en) * 1995-03-15 1995-04-13 Bhp Steel (Jla) Pty Limited Casting of metal
AUPO749697A0 (en) * 1997-06-23 1997-07-17 Bhp Steel (Jla) Pty Limited Twin roll continuous casting installation
WO2000003042A1 (en) * 1998-07-10 2000-01-20 Ipsco Inc. Method and apparatus for producing martensite- or bainite-rich steel using steckel mill and controlled cooling
JP2000351002A (ja) * 1999-06-08 2000-12-19 Kawasaki Steel Corp 熱延鋼帯の製造方法および仕上タンデム圧延機
AUPQ436299A0 (en) * 1999-12-01 1999-12-23 Bhp Steel (Jla) Pty Limited Casting steel strip
DE10047044A1 (de) * 2000-09-22 2002-04-25 Sms Demag Ag Verfahren und Anlagen zum Herstellen von Bändern und Blechen aus Stahl
BR0114336B1 (pt) * 2000-09-29 2010-07-27 processo para produzir tira de aço fundido preparada por esse processo.
AUPR047900A0 (en) * 2000-09-29 2000-10-26 Bhp Steel (Jla) Pty Limited A method of producing steel
DE10131369A1 (de) * 2001-06-28 2003-01-09 Sms Demag Ag Verfahren und Vorrichtung zum Kühlen und Schmieren von Walzen eines Walzgerüstes
JP2003170207A (ja) * 2001-12-07 2003-06-17 Kobe Steel Ltd 金属板の圧延方法
US7404431B2 (en) * 2002-06-04 2008-07-29 Nucor Corporation Production of thin steel strip
ITMI20021506A1 (it) * 2002-07-10 2004-01-12 Danieli Off Mecc Dispositivo di regolazione della temperatura del nastro in un impianto di colata continua di nastro metallico
US20040144518A1 (en) * 2003-01-24 2004-07-29 Blejde Walter N. Casting steel strip with low surface roughness and low porosity
RU2236917C1 (ru) * 2003-09-08 2004-09-27 Открытое акционерное общество "Новолипецкий металлургический комбиант" Способ производства рулонного полосового проката
US7181822B2 (en) * 2005-01-20 2007-02-27 Nucor Corporation Method and apparatus for controlling strip shape in hot rolling mills
JP4528180B2 (ja) * 2005-03-30 2010-08-18 新日本製鐵株式会社 圧延油量の制御方法

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KR20080096830A (ko) 2008-11-03
MA30275B1 (fr) 2009-03-02
KR101446937B1 (ko) 2014-10-06
BRPI0708328B1 (pt) 2019-07-09
CN101432083A (zh) 2009-05-13
RU2008138583A (ru) 2010-04-10
EP1989009A4 (en) 2012-10-17
JP2014100741A (ja) 2014-06-05
KR101446993B1 (ko) 2014-10-07
BRPI0708328A2 (pt) 2011-05-24
AU2007219065A1 (en) 2007-08-30
AU2007219065B2 (en) 2012-03-08
KR20140077218A (ko) 2014-06-23
MX2008010670A (es) 2008-09-05
US20090126896A1 (en) 2009-05-21
JP5764282B2 (ja) 2015-08-19
MY157942A (en) 2016-08-30
EP1989009A1 (en) 2008-11-12
WO2007095695A1 (en) 2007-08-30
RU2451566C2 (ru) 2012-05-27
NZ571431A (en) 2011-02-25
UA94089C2 (uk) 2011-04-11
PL1989009T3 (pl) 2015-10-30
CN101432083B (zh) 2013-01-02
JP2009528168A (ja) 2009-08-06
US20070199627A1 (en) 2007-08-30

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