EP0430840B1 - Procédé et dipositif de coulée continue sur un ou entre deux cylindres - Google Patents

Procédé et dipositif de coulée continue sur un ou entre deux cylindres Download PDF

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Publication number
EP0430840B1
EP0430840B1 EP90470061A EP90470061A EP0430840B1 EP 0430840 B1 EP0430840 B1 EP 0430840B1 EP 90470061 A EP90470061 A EP 90470061A EP 90470061 A EP90470061 A EP 90470061A EP 0430840 B1 EP0430840 B1 EP 0430840B1
Authority
EP
European Patent Office
Prior art keywords
zones
roll
casting
rolls
rugosity
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.)
Expired - Lifetime
Application number
EP90470061A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0430840A1 (fr
Inventor
Philippe Blin
Laurent Sosin
Dominique Loison
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.)
USINOR SA
Original Assignee
USINOR Sacilor SA
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 USINOR Sacilor SA filed Critical USINOR Sacilor SA
Publication of EP0430840A1 publication Critical patent/EP0430840A1/fr
Application granted granted Critical
Publication of EP0430840B1 publication Critical patent/EP0430840B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels
    • 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
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels

Definitions

  • the invention relates to the continuous casting of thin metallic products, in particular steel sheets, on one or between two cylinders.
  • This type of casting is already known, which consists in bringing molten metal into contact with a cooled moving moving surface. On contact with this cold surface, the cast metal solidifies and is driven by the scrolling movement of the surface.
  • One of the known problems of this type of casting is to ensure uniform solidification of the metal in contact with the cooled surface, this problem being generated by the fact that during contact of the molten metal with the cooled surface, the metal shrinks in solidifying, this constriction causing localized detachments of the skin of solidified metal relative to the casting surface. It follows that in the areas where this detachment occurs, the cooling of the metal is slowed down compared to the areas where the skin remains in good contact with the cooled surface. It appeared that on a smooth surface, these phenomena occurred in a disorderly manner, thus causing irregularities as much in the appearance of the surface of the cast product as in its structure, and being able to cause defects such as surface cracks.
  • the present invention aims to solve these problems, to avoid incidents of casting such as breakthroughs or snagging, and to provide a product of satisfactory quality over its entire width, and in particular on its edges.
  • the invention relates to a process for casting thin metallic products on one or between two cylinders driven in rotation, according to which molten metal is caused to solidify on contact with the cooled walls of said cylinder or cylinders. by forming skins of solid metal which are continuously driven by the rotation of the cylinder (s).
  • this process is characterized in that preferably only certain longitudinal zones of the solidified skins are driven.
  • said preferentially driven zones are located near the edges or at the edges of the cast product.
  • the edges of the skins in the course of solidification are subjected to a particularly large driving force which prevents them from catching on the fixed side walls or which at least, in the event of the beginning of catching, breaks it. and thus prevents the amount of metal hanging from growing and leading to a breakthrough of liquid metal downstream of the attachment.
  • said preferentially driven zones are located at a distance from the edges of the cast product.
  • the middle zone of the skins which is preferably driven with respect to the edges.
  • the edges of the skins in the course of solidification have a certain freedom of deformation and, in the event of catching on the side walls, only these zones are disturbed, being subjected to a longitudinal shearing effect, while the median zone of the product, being uniformly driven, does not undergo surface constraints. It seems that, in this case, the edges of the skins somehow ensure a damping effect of the stresses generated by the friction on the side walls, which are distributed over the width of the edge areas not subjected to the preferential drive, this effect being all the more important as these edge areas are wide. Obviously, these edge areas being particularly disturbed, it may be necessary to drop them downstream of the casting device.
  • the invention also relates to a device for casting thin metallic products on one or between two cylinders, this device comprising one or two cylinders driven in rotation and whose walls are cooled and whose surface has a certain roughness, and walls lateral delimiting with said cylinder or cylinders a casting space.
  • this device is characterized in that the surface of said cylinder or cylinders is divided into at least three circumferential zones, at least one of said zones having a roughness greater than that of the other zones.
  • the surface of the cylinders comprises two rough areas each located near a side wall, the roughness of which is greater than that of a third area located between the two said rough areas.
  • this first variant of the device allows in particular the implementation of the first variant of the method described above, by promoting a preferential drive of the edges of the skins solidified on the surface of the cylinder (s).
  • the surface of the cylinder comprises at least one rough zone, with roughness greater than that of the other zones, this or these rough zones being at a distance from the side walls.
  • this second variant of the device allows in particular the implementation of the second variant, described above, of the method, by favoring a preferential drive of a middle zone of the solidified skins, by allowing a possible sliding of the edges of said skins.
  • the inventors have in fact discovered that, in addition to the beneficial aspects on the regularity of solidification of the cast product, particular characteristics relating to the roughness of the casting surfaces could participate in improving the conditions of the casting operation and facilitate obtaining of a product cast on one or between two cylinders, in particular by avoiding the well-known problems caused by the contact of the metal with the fixed side walls.
  • Figure 1 is shown schematically a casting installation between two cylinders comprising two cylinders 1 driven in rotation according to the arrows 2 and two fixed side walls 3 disposed against the ends of the cylinders 1 to close a casting space 5 in which is poured , during casting, molten metal.
  • the cylindrical wall of the cylinders 1 is cooled, and as is well known, the molten metal poured into the casting space 4 solidifies on contact with these cooled walls, forming skins of solidified metal which gradually thicken and become join at the plane of the axes of the cylinders 1 to form the product cast in the form of a thin strip which is continuously pulled down.
  • the surface of the walls of the cylinders 1 comprises, near each of the side walls 3, circumferential zones 5, represented by cross hatching, the roughness of which is greater than that of the central zone 6.
  • the width of the zones 5 of high roughness is approximately 10 mm, the roughness Rz of these zones 5 being 150 ⁇ m and that of the zone median 6 of 80 ”m.
  • the roughness Rz of the rougher zones 5 will be substantially equal to or greater than twice that of the less rough zones.
  • Such roughness can be imparted to the casting surface by numerous methods such as knurling, shot blasting, EDM, hammering, etc.
  • the type or shape of the roughness will essentially depend on the process chosen. For example, in the case of roughness imparted by knurling, achieve a roughness of the cross knurling type, as shown by its appearance in FIG. 1, or transverse straight knurling forming stripes oriented parallel to the axis of the cylinders, as represented by its appearance in FIGS. 2.
  • the roughness of the different zones can be achieved by different methods.
  • each cylinder will have a zone 5 ′ of high roughness on one edge of the casting surface, and another zone of high roughness at a certain distance from the other edge, this distance being defined as a function of the spacing of the side walls.
  • the cylindrical zone 7 which is in contact with the side walls is preferably of sufficiently low roughness so as not to risk abrasion of the side wall during casting.
  • a cylinder such as that shown in plan in Figure 4 can be used in place of cylinders 1 in the device shown in Figure 1.
  • the zones 8 of higher roughness of this type of cylinder have the distinction of being divided circumferentially into several segments 8 ′, 8 ⁇ alternately having different roughnesses.
  • the segments 8 ′ have a high roughness, greater than that of the segments 8 ⁇ which can itself be equal to or greater than that of the middle zone 6.
  • This particular arrangement makes it possible in particular to facilitate possible dropping of the edges of the cast product, obtained by the use of such cylinders, by creating preferential rupture zones of said edges.
  • the device shown in top view in Figure 3 is intended for the implementation of the method taken in its second variant.
  • the cylinders 1 ′ have a median circumferential zone 6 ′ with greater roughness than the circumferential zones 9 located near the side walls.
  • the roughness of the zones 9 is sufficiently low to allow sliding of the edges of the solidified skins on these zones, in the event that said edges tend to be retained by hooking on the side walls. This sliding can moreover be favored by lubrication of the zones 9, prior to casting or regularly during the latter.
  • the roughness of the median circumferential zones 6 ′ of the cylinders 1 ′ can of course be achieved by the methods mentioned above.
  • the invention is not limited to the devices which have just been described by way of example. It can in particular be applied to casting installations on a single cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Moulding By Coating Moulds (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Physical Vapour Deposition (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP90470061A 1989-11-23 1990-11-07 Procédé et dipositif de coulée continue sur un ou entre deux cylindres Expired - Lifetime EP0430840B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915539A FR2654659B1 (fr) 1989-11-23 1989-11-23 Procede et dispositif de coulee continue sur un ou entre deux cylindres.
FR8915539 1989-11-23

Publications (2)

Publication Number Publication Date
EP0430840A1 EP0430840A1 (fr) 1991-06-05
EP0430840B1 true EP0430840B1 (fr) 1994-06-22

Family

ID=9387791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470061A Expired - Lifetime EP0430840B1 (fr) 1989-11-23 1990-11-07 Procédé et dipositif de coulée continue sur un ou entre deux cylindres

Country Status (27)

Country Link
US (1) US5156201A (xx)
EP (1) EP0430840B1 (xx)
JP (1) JP2994455B2 (xx)
KR (1) KR0178519B1 (xx)
CN (1) CN1054323C (xx)
AT (1) ATE107552T1 (xx)
AU (1) AU638509B2 (xx)
BR (1) BR9005920A (xx)
CA (1) CA2030610C (xx)
CZ (1) CZ279738B6 (xx)
DE (1) DE69010161T2 (xx)
DK (1) DK0430840T3 (xx)
ES (1) ES2055892T3 (xx)
FI (1) FI90836C (xx)
FR (1) FR2654659B1 (xx)
HU (1) HU209554B (xx)
IE (1) IE904167A1 (xx)
MA (1) MA21998A1 (xx)
NO (1) NO905035L (xx)
PL (1) PL163800B1 (xx)
PT (1) PT95968A (xx)
RU (1) RU2038885C1 (xx)
SK (1) SK280491B6 (xx)
TN (1) TNSN90136A1 (xx)
TR (1) TR25080A (xx)
UA (1) UA25963A1 (xx)
ZA (1) ZA909372B (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684904B1 (fr) * 1991-12-11 1994-03-18 Usinor Sacilor Cylindre pour une machine de coulee continue de bandes metalliques, machine de coulee continue correspondante et procede de realisation d'un tel cylindre.
GB2279595A (en) * 1993-07-06 1995-01-11 British Steel Plc Continuous casting using rollers having varying radii across their width
AUPP040397A0 (en) * 1997-11-14 1997-12-11 Bhp Steel (Jla) Pty Limited Casting metal strip
ES2333232T3 (es) 2000-05-12 2010-02-18 Nippon Steel Corporation Un tambor de enfriamiento para colada continua de planchas delgadas.
JP4821199B2 (ja) * 2005-07-12 2011-11-24 株式会社Ｉｈｉ 双ロール鋳造機
KR100711793B1 (ko) * 2005-09-02 2007-04-30 주식회사 포스코 쌍롤식 박판 주조기의 주조롤 및 이를 사용하여 제조된주물편
KR100770342B1 (ko) * 2006-07-11 2007-10-25 주식회사 포스코 박판주조기의 주조롤
AU2008100847A4 (en) * 2007-10-12 2008-10-09 Bluescope Steel Limited Method of forming textured casting rolls with diamond engraving
EP3753648B1 (en) * 2009-10-30 2023-11-29 Nucor Corporation Method and apparatus for controlling variable shell thickness in cast strip
US20180179612A1 (en) * 2016-12-23 2018-06-28 Posco Duplex stainless steel sheet having excellent corrosion resistance and method for manufacturing the same

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844336A (en) * 1972-12-27 1974-10-29 Martin Marietta Aluminum Method of producing continuous cast metallic sheet with patterned surface
US4688623A (en) * 1981-12-21 1987-08-25 Atlantic Richfield Company Textured silicon ribbon growth wheel
CA1181558A (en) * 1982-04-08 1985-01-29 Takashi Onoyama Apparatus for producing flake particles
US4456579A (en) * 1982-09-30 1984-06-26 Gnb Batteries Inc. Low antimony lead-based alloy and method
US4677623A (en) * 1983-11-11 1987-06-30 Hitachi, Ltd. Decoding method and apparatus for cyclic codes
JPS6197967A (ja) * 1984-10-19 1986-05-16 Hitachi Ltd 半導体装置およびその製造方法
JP2632824B2 (ja) * 1985-10-11 1997-07-23 バッテル・メモリアル・インスティチュート 熔融物から直接金属板を鋳造する方法
US4705095A (en) * 1986-01-09 1987-11-10 Ribbon Technology Corporation Textured substrate and method for the direct, continuous casting of metal sheet exhibiting improved uniformity
JPH0765567B2 (ja) * 1986-04-09 1995-07-19 株式会社豊田自動織機製作所 揺動斜板型圧縮機におけるクランク室圧力の制御機構
JPH0815639B2 (ja) * 1986-04-30 1996-02-21 日新製鋼株式会社 双ロ−ル式連鋳機
JPS6376740A (ja) * 1986-09-18 1988-04-07 Nippon Yakin Kogyo Co Ltd 凹凸模様を有する金属薄板帯の直接製造方法とその製造装置
JPS6483343A (en) * 1987-09-24 1989-03-29 Nippon Steel Corp Method for continuously casting cast thin slab
DE3877675T2 (de) * 1987-09-24 1993-06-09 Nippon Steel Corp Kuehltrommel fuer stranggussmaschinen zur herstellung duenner metallischer baender.
JPH0218743A (ja) * 1988-07-06 1990-01-23 Hitachi Ltd 記録再生装置

Also Published As

Publication number Publication date
JP2994455B2 (ja) 1999-12-27
PL287874A1 (en) 1991-12-02
ES2055892T3 (es) 1994-09-01
ZA909372B (en) 1991-07-31
EP0430840A1 (fr) 1991-06-05
FR2654659A1 (fr) 1991-05-24
KR910009365A (ko) 1991-06-28
HU907102D0 (en) 1991-05-28
PL163800B1 (pl) 1994-05-31
US5156201A (en) 1992-10-20
MA21998A1 (fr) 1991-07-01
FI905719A (fi) 1991-05-24
AU638509B2 (en) 1993-07-01
UA25963A1 (uk) 1999-02-26
PT95968A (pt) 1991-09-13
CA2030610C (fr) 2001-08-21
FI905719A0 (fi) 1990-11-20
FR2654659B1 (fr) 1992-02-07
BR9005920A (pt) 1991-09-24
DE69010161T2 (de) 1995-02-09
FI90836B (fi) 1993-12-31
FI90836C (fi) 1994-04-11
CS565290A3 (en) 1992-01-15
CN1052623A (zh) 1991-07-03
SK280491B6 (sk) 2000-03-13
JPH03174956A (ja) 1991-07-30
TNSN90136A1 (fr) 1991-03-05
CZ279738B6 (cs) 1995-06-14
CA2030610A1 (fr) 1991-05-24
ATE107552T1 (de) 1994-07-15
KR0178519B1 (ko) 1999-02-18
AU6655490A (en) 1991-05-30
NO905035L (no) 1991-05-24
RU2038885C1 (ru) 1995-07-09
DE69010161D1 (de) 1994-07-28
HU209554B (en) 1994-07-28
TR25080A (tr) 1992-11-01
DK0430840T3 (da) 1994-10-24
NO905035D0 (no) 1990-11-21
HUT59044A (en) 1992-04-28
CN1054323C (zh) 2000-07-12
IE904167A1 (en) 1991-06-05

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