US20070199627A1 - Low surface roughness cast strip and method and apparatus for making the same - Google Patents

Low surface roughness cast strip and method and apparatus for making the same Download PDF

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Publication number
US20070199627A1
US20070199627A1 US11/362,682 US36268206A US2007199627A1 US 20070199627 A1 US20070199627 A1 US 20070199627A1 US 36268206 A US36268206 A US 36268206A US 2007199627 A1 US2007199627 A1 US 2007199627A1
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US
United States
Prior art keywords
strip
surface roughness
thin cast
rolls
microns
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.)
Abandoned
Application number
US11/362,682
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English (en)
Inventor
Walter Blejde
Jay 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
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to US11/362,682 priority Critical patent/US20070199627A1/en
Assigned to NUCOR CORPORATION reassignment NUCOR CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLEJDE, WALTER N., ONDROVIC, JAY JON
Priority to CN2007800152657A priority patent/CN101432083B/zh
Priority to RU2008138583/02A priority patent/RU2451566C2/ru
Priority to BRPI0708328-9A priority patent/BRPI0708328B1/pt
Priority to AU2007219065A priority patent/AU2007219065B2/en
Priority to EP07701554.3A priority patent/EP1989009B1/en
Priority to PCT/AU2007/000227 priority patent/WO2007095695A1/en
Priority to JP2008555568A priority patent/JP5764282B2/ja
Priority to UAA200811548A priority patent/UA94089C2/uk
Priority to KR1020147014431A priority patent/KR101446993B1/ko
Priority to PL07701554T priority patent/PL1989009T3/pl
Priority to MX2008010670A priority patent/MX2008010670A/es
Priority to KR1020087022414A priority patent/KR101446937B1/ko
Priority to MYPI20083240A priority patent/MY157942A/en
Priority to NZ571431A priority patent/NZ571431A/en
Publication of US20070199627A1 publication Critical patent/US20070199627A1/en
Priority to MA31230A priority patent/MA30275B1/fr
Priority to US12/272,207 priority patent/US20090126896A1/en
Priority to US13/215,388 priority patent/US8562766B2/en
Priority to JP2013249012A priority patent/JP2014100741A/ja
Abandoned legal-status Critical Current

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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 cast strip made by a twin roll caster, and the method and apparatus for making such cast strip.
  • molten metal is introduced between a pair of counter-rotated 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 U.S. Pat. Nos. 5,762,126 and 5,960,855.
  • Cast strip produced by twin roll caster is generally hot rolled in a hot rolling mill after the strip emerges from the caster to shape the thin strip. It is generally understood that to cast strip with acceptable shape, the hot rolling mill is used in connection with a twin roll caster is to provide the desired cross-sectional profile to the cast strip. Still, a surface roughness of 6 to 8 microns Ra with surface micro-cracking was common for cast strip emerging from the hot rolling mill while casting at a standard casting speed of 80 m/min and 16% reduction of the strip by the hot rolling mill.
  • FIG. 1 is a micrograph showing typical surface roughness of such cast strip emerging from a hot rolling mill in-line with a twin roll caster.
  • 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 was a problem. It was possible to reduce the casting speed and the heat rate of the strip to reduce microcracking, 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.
  • a 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 about 10 microns made by the steps comprising:
  • a 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 about 10 microns.
  • a thin cast strip may have a surface roughness less than 1.0 microns Ra or less than 0.7 or 0.5 microns Ra.
  • the thin cast strip may have a scale thickness less than 7 or 4 microns.
  • the cast strip may be passed through the hot rolling mill at a temperature less than 1050° C. while a mixture of oil and water is applied to the work rolls.
  • the mixture of oil and water may be applied by spraying the work rolls, or may be applied to the back-up rolls.
  • the mixture of oil and water may be less than 5% oil to form a thin cast strip with a low surface roughness of less than 1.5 microns Ra.
  • FIG. 1 is a micrograph showing typical surface roughness of a cast strip after hot rolling
  • FIG. 2 is a schematic illustrating a thin strip casting plant having a hot rolling mill for controlling the shape of cast strip
  • FIG. 3 is an enlarged cut-away side view of the caster of the thin strip casting plant of FIG. 2 ;
  • FIG. 4 is a schematic diagram showing a system for the application of an oil and water mixture to the rolls of a hot rolling mill.
  • FIG. 5 is a diagram showing the Average Surface Roughness for Thin Cast Steel Strip, Sequence 2613, made using o the present invention.
  • 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 After exiting the 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 16 A and 16 B, 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 20 A 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 22 A 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 22 A.
  • 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 13 and 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.
  • 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 U.S. Pat. No. 5,184,668 and 5,277,243, or U.S. Pat. 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 16 A and lower roll 16 B.
  • 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 .
  • 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 16 A, 16 B.
  • 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 .
  • 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.
  • FIG. 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 FIG. 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
US11/362,682 2006-02-27 2006-02-27 Low surface roughness cast strip and method and apparatus for making the same Abandoned US20070199627A1 (en)

Priority Applications (19)

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
NZ571431A NZ571431A (en) 2006-02-27 2007-02-27 A thin cast strip having at least one microstructure and method and apparatus for making the same
UAA200811548A UA94089C2 (uk) 2006-02-27 2007-02-27 Лита стрічка з низькою шорсткістю поверхні та спосіб її виготовлення
PL07701554T PL1989009T3 (pl) 2006-02-27 2007-02-27 Sposób wytwarzania odlewanej taśmy o małej chropowatości powierzchni
BRPI0708328-9A BRPI0708328B1 (pt) 2006-02-27 2007-02-27 Método para produzir tira de fundição fina
AU2007219065A AU2007219065B2 (en) 2006-02-27 2007-02-27 Low surface roughness cast strip and method and apparatus for making the same
EP07701554.3A EP1989009B1 (en) 2006-02-27 2007-02-27 Method for making low surface roughness cast strip
PCT/AU2007/000227 WO2007095695A1 (en) 2006-02-27 2007-02-27 Low surface roughness cast strip and method and apparatus for making the same
JP2008555568A JP5764282B2 (ja) 2006-02-27 2007-02-27 低表面粗度鋳造ストリップ製造方法
CN2007800152657A CN101432083B (zh) 2006-02-27 2007-02-27 低表面粗糙度铸带生产方法
KR1020147014431A KR101446993B1 (ko) 2006-02-27 2007-02-27 표면조도가 낮은 주조 스트립과 이를 제조하기 위한 방법 및 장치
RU2008138583/02A RU2451566C2 (ru) 2006-02-27 2007-02-27 Литая лента с низкой шероховатостью поверхности, способ и устройство для ее изготовления
MX2008010670A MX2008010670A (es) 2006-02-27 2007-02-27 Tira colada de baja rugosidad superficial y metodo y aparato para fabricar la misma.
KR1020087022414A KR101446937B1 (ko) 2006-02-27 2007-02-27 표면조도가 낮은 주조 스트립과 이를 제조하기 위한 방법 및 장치
MYPI20083240A MY157942A (en) 2006-02-27 2007-02-27 Low surface roughness cast strip and method and apparatus for making the same
MA31230A MA30275B1 (fr) 2006-02-27 2008-09-10 Bande de coulee a faible rugosite de surface, procede et appareil pour fabriquer ladite bande.
US12/272,207 US20090126896A1 (en) 2006-02-27 2008-11-17 Low surface roughness cast strip and method and apparatus for making the same
US13/215,388 US8562766B2 (en) 2006-02-27 2011-08-23 Method for making a low surface roughness cast strip
JP2013249012A JP2014100741A (ja) 2006-02-27 2013-12-02 低表面粗度鋳造ストリップ製造方法

Applications Claiming Priority (1)

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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/272,207 Continuation US20090126896A1 (en) 2006-02-27 2008-11-17 Low surface roughness cast strip and method and apparatus for making the same

Publications (1)

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US20070199627A1 true US20070199627A1 (en) 2007-08-30

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US11/362,682 Abandoned US20070199627A1 (en) 2006-02-27 2006-02-27 Low surface roughness cast strip and method and apparatus for making the same
US12/272,207 Abandoned US20090126896A1 (en) 2006-02-27 2008-11-17 Low surface roughness cast strip and method and apparatus for making the same

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US12/272,207 Abandoned US20090126896A1 (en) 2006-02-27 2008-11-17 Low surface roughness cast strip and method and apparatus for making the same

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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)

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US20110100970A1 (en) * 2009-11-03 2011-05-05 Lincoln Global, Inc. Manufacture of cored welding electrodes
US9156082B2 (en) 2013-06-04 2015-10-13 Nucor Corporation Method of continuously casting thin strip
US9700937B2 (en) 2010-07-14 2017-07-11 Vacuumschmelze Gmbh & Co. Kg Device and method for the production of a metallic strip
CN109531176A (zh) * 2018-12-28 2019-03-29 中冶京诚工程技术有限公司 带钢铸轧生产过程中的在线切边装置及在线切边方法

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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
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
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US20090126896A1 (en) 2009-05-21
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