EP0350345B1 - Procédé et dispositif de coulée continue de produits métalliques minces - Google Patents

Procédé et dispositif de coulée continue de produits métalliques minces Download PDF

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Publication number
EP0350345B1
EP0350345B1 EP89401576A EP89401576A EP0350345B1 EP 0350345 B1 EP0350345 B1 EP 0350345B1 EP 89401576 A EP89401576 A EP 89401576A EP 89401576 A EP89401576 A EP 89401576A EP 0350345 B1 EP0350345 B1 EP 0350345B1
Authority
EP
European Patent Office
Prior art keywords
roller
cylinder
speed
wall
main cylinder
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
EP89401576A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0350345A1 (fr
Inventor
Serge Heurtault
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT89401576T priority Critical patent/ATE69565T1/de
Publication of EP0350345A1 publication Critical patent/EP0350345A1/fr
Application granted granted Critical
Publication of EP0350345B1 publication Critical patent/EP0350345B1/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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/111—Treating the molten metal by using protecting powders
    • 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 present invention relates to the direct production of metal strips or sheets from molten metal, and more particularly to the production of strips or sheets of thin or very thin, in particular steel, by the technique known as continuous casting on a cylinder.
  • This known technique consists in casting the molten metal on the cooled side wall of a cylinder driven in rotation, the metal solidifying in contact with this wall, the strip thus formed being maintained in contact with the wall, on a part of the circumference thereof, to continue cooling.
  • the molten metal is commonly brought into contact with the wall of the cylinder by an open refractory channel, the end of which is flush with said wall.
  • the rotating cylinder drives in its movement the metal which solidifies progressively on contact.
  • the molten metal must also be contained in the supply channel at its upper part. This can be ensured by a fixed refractory upper wall linked to the channel as described in document US 4274471.
  • This document also reveals the use of a cooled roller joined with the end of this upper wall, this roller initiating the solidification of the upper skin of the product and limiting the thickness of the latter.
  • Document EP 0198669 also discloses the use for this purpose of a roller which is partially immersed in the liquid metal and driven in rotation.
  • the object of the present invention is to obtain, by a method of the type described above, a product which does not have these surface defects.
  • the object of the invention is a process for the continuous casting of thin products such as sheets or strips according to which the molten metal is brought into contact with the cooled wall of a main cylinder driven in rotation, the liquid metal being moreover contained by a roller of diameter less than that of the cylinder, driven in rotation, and kept at a distance from the wall of the main cylinder by a value substantially equal to the thickness of the cast product.
  • the roller is rotated at a speed such that its peripheral linear speed is greater than that of the cylinder.
  • the overspeed of the roller relative to that of the main cylinder is from 2 to 20%. Preferably, it is 6 to 10%.
  • the inventors have found that thanks to the implementation of the invention, the surface defects of the product obtained such as irregularity or flaking are eliminated, or at least greatly reduced.
  • the inventors have noted in particular that the aforementioned surface defects could be attributed to poor control of the trajectory of the strip or of the sheet metal just downstream of the "neck" between the main cylinder and the roller, the product then having a tendency not to remain in contact with the main cylinder, when it should do so over a certain circumferential distance from said neck to ensure uniformity of contact of the underside of the product with the cylinder.
  • the problem faced by the inventors was to precisely control the trajectory of the product poured from the neck to ensure the desired intimate contact with the main cylinder.
  • the inventors have been able to demonstrate, by experiments carried out in the case of steel casting in thin strips, that the strip naturally tends to "peel off” from the wall of the cylinder from the neck, this effect occurring at more or less large scale depending on the casting conditions, even if the strip is guided downstream of the neck by appropriate means.
  • the inventors have verified that the rotation drive of the cylinder, in the opposite direction to that of the main cylinder, and in peripheral linear overspeed with respect to the latter, makes it possible to ensure the practically perfect contact sought between the underside of the product and the main cylinder wall.
  • a device for the continuous casting of thin products of this type comprises a main cylinder driven in rotation and the side wall of which is cooled, a channel for supplying the molten metal on said wall of the cylinder, and a cooling roller placed parallel to the main cylinder and at a distance from the latter substantially equal to the thickness desired for the product, this roller at least partially closing off the upper zone of the end of the supply channel.
  • the device further comprises means for driving the roller in rotation at a speed adjustable independently of the speed of the main cylinder to adjust the peripheral linear speed of the cylinder. to a value greater than that of the peripheral linear speed of the main cylinder.
  • the installation comprises a main cylinder 1 driven in rotation in the direction of arrow F1 by a motor 2.
  • the rotation speed can be adjustable to adapt to various casting conditions.
  • the cylinder 1 has a side wall 11 cooled in a conventional manner, for example by internal circulation of a cooling fluid.
  • a roller 3 is arranged parallel to the cylinder and at a distance from the latter substantially equal to the desired thickness of the metal strip 10. The side wall of this roller is also cooled. The roller 3 is rotated in the direction of the arrow F2 by a motor 4 and its speed can be adjusted by the adjustment means 5.
  • the roller 3 is positioned relative to the cylinder 1 in a sector of angle ⁇ of between 0 and 45 ° relative to the vertical.
  • a minimal clearance is provided between the end 61 of this channel and the wall of the cylinder to avoid wear thereof while avoiding liquid metal leaks.
  • an upper wall 62 of the channel is attached to the roller 3. This wall is however not necessary if the position of the surface of the liquid metal 7 can be controlled so as not to overflow above said roller.
  • a scraper 8 is disposed near the cylinder 1 at the point where the solidified strip 10 moves away from the cylinder, to guide the latter.
  • the diameter of cylinder 1 is 660 mm and that of roller 3 is 200 mm. These values are given for information only and it is understood that the diameters may be different from the above values.
  • the ratio between the respective diameters of the cylinder and the roller can also be changed.
  • the diameter of the roller will however preferably be less than that of the cylinder.
  • the cylinder and the roller are rotated.
  • the liquid metal 7 is brought into the channel 6 and its level is preferably maintained slightly below the axis of the roller.
  • the linear peripheral speed of the roller 3 is adjusted to be greater than that of the cylinder 1.
  • the speed difference is preferably of the order of 6 to 10%, but can range from 2 to 20%.
  • the molten metal 7 solidifies and forms on each of the cooled surfaces a solidified skin whose thickness increases in the direction of casting.
  • the roller 3 is of smaller diameter than that of the cylinder 1.
  • the side walls of the cylinder and of the roller are of the same nature (copper wall) and the cooling of these is such that the heat exchange conditions at their surfaces are similar.
  • the skin 10 ′ formed on the cylinder 1 has a thickness greater than that 10 ⁇ formed on the roller 3.
  • the two skins 10 ′ and 10 ⁇ meet substantially at the level of the neck between cylinder and roller.
  • the device and the method according to the invention make it possible to obtain a product, sheet or strip, having a good surface condition, without the defects observed previously.
  • the invention is not limited to the device and method described above by way of example.
  • the relative position of the roller relative to the cylinder can also be modified, the angle can take any value.
  • the overspeed must be adapted according to the casting conditions, the respective coolings of the cylinder and the roller, the nature and the surface condition of these, as well as their possible lubrication.
  • the method is applicable to the casting of metals other than steel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Forging (AREA)
  • Formation And Processing Of Food Products (AREA)
EP89401576A 1988-07-06 1989-06-07 Procédé et dispositif de coulée continue de produits métalliques minces Expired - Lifetime EP0350345B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401576T ATE69565T1 (de) 1988-07-06 1989-06-07 Verfahren und vorrichtung zum stranggiessen von duennen metallischen produkten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8809275 1988-07-06
FR8809275A FR2633852B1 (fr) 1988-07-06 1988-07-06 Procede et dispositif de coulee continue de produits metalliques minces

Publications (2)

Publication Number Publication Date
EP0350345A1 EP0350345A1 (fr) 1990-01-10
EP0350345B1 true EP0350345B1 (fr) 1991-11-21

Family

ID=9368227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401576A Expired - Lifetime EP0350345B1 (fr) 1988-07-06 1989-06-07 Procédé et dispositif de coulée continue de produits métalliques minces

Country Status (16)

Country Link
US (1) US5083603A (pt)
EP (1) EP0350345B1 (pt)
JP (1) JPH0263651A (pt)
KR (1) KR900001442A (pt)
CN (1) CN1017319B (pt)
AT (1) ATE69565T1 (pt)
AU (1) AU608451B2 (pt)
BR (1) BR8903329A (pt)
DD (1) DD283961A5 (pt)
DE (1) DE68900449D1 (pt)
ES (1) ES2027455T3 (pt)
FI (1) FI86693C (pt)
FR (1) FR2633852B1 (pt)
GR (1) GR3003868T3 (pt)
RU (1) RU1774897C (pt)
ZA (1) ZA894772B (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100540179C (zh) * 2004-09-20 2009-09-16 北京航空航天大学 一种快速凝固制备非晶薄带的方法
JP5083862B2 (ja) * 2006-12-13 2012-11-28 株式会社神戸製鋼所 クラッド金属板の製造方法
JP4672745B2 (ja) * 2008-03-11 2011-04-20 三菱日立製鉄機械株式会社 双ドラム式連続鋳造設備及び連続鋳造方法
ES2799412T3 (es) * 2009-11-06 2020-12-17 Mitek Holdings Inc Moldeado continuo de tira de aleación de plomo para electrodos de batería de alta resistencia
CN108290212A (zh) * 2015-11-30 2018-07-17 新日铁住金株式会社 金属薄带的制造装置及使用其进行的金属薄带的制造方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038225B2 (ja) * 1977-09-12 1985-08-30 ソニー株式会社 非晶質合金の製造方法
JPS5938062B2 (ja) * 1978-03-15 1984-09-13 日本碍子株式会社 金属の連続鋳造法
US4450891A (en) * 1980-09-02 1984-05-29 Allied Corporation Method of and apparatus for continuous casting using an auxiliary graphite chill roll
JPS58212844A (ja) * 1982-06-04 1983-12-10 Mitsubishi Heavy Ind Ltd 薄板連続鋳造装置
JPS5913551A (ja) * 1982-07-15 1984-01-24 Nippon Kokan Kk <Nkk> 鋼板の連続鋳造装置
CH666842A5 (de) * 1984-03-01 1988-08-31 Concast Service Union Ag Verfahren und vorrichtung zum kontinuierlichen giessen von metallen in form von band zwischen zwei gekuehlten achsparallelen trommeln.
JPS61253149A (ja) * 1985-04-12 1986-11-11 Nippon Kinzoku Kogyo Kk 金属薄板の連続鋳造による製造装置
US4842042A (en) * 1988-03-07 1989-06-27 Battelle Development Corporation Thickness control of direct cast strip

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no 152 (M-309) (1589), 14 juillet 1984; & JP-A-5947048 (MITSUBISHI JUKOGYO K.K.) 16.03.1984 *
PATENT ABSTRACTS OF JAPAN vol. 9, no 132 (M-385) (1855), 7 juin 1985; & JP-A-6015049 (HITACHI SEISAKUSHO K.K.) 25.01.1985 *
PATENT ABSTRACTS OF JAPAN vol.8, no 61 (M-284)(1498), 23 Mars 1984; & JP-A-58212844 (MITSUBISHI JUKOGYO K.K.) 10.12.1983 *

Also Published As

Publication number Publication date
ZA894772B (en) 1990-03-28
US5083603A (en) 1992-01-28
AU608451B2 (en) 1991-03-28
JPH0263651A (ja) 1990-03-02
BR8903329A (pt) 1990-02-13
FR2633852A1 (fr) 1990-01-12
FR2633852B1 (fr) 1991-04-26
FI893299A0 (fi) 1989-07-06
DD283961A5 (de) 1990-10-31
GR3003868T3 (pt) 1993-03-16
DE68900449D1 (de) 1992-01-02
RU1774897C (ru) 1992-11-07
ES2027455T3 (es) 1992-06-01
FI86693B (fi) 1992-06-30
FI893299A (fi) 1990-01-07
CN1039547A (zh) 1990-02-14
AU3675289A (en) 1990-01-11
FI86693C (fi) 1992-10-12
KR900001442A (ko) 1990-02-27
CN1017319B (zh) 1992-07-08
ATE69565T1 (de) 1991-12-15
EP0350345A1 (fr) 1990-01-10

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