EP0413650A1 - Procédé et dispositif de coulée continue directe de produits métalliques minces - Google Patents

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

Info

Publication number
EP0413650A1
EP0413650A1 EP90470045A EP90470045A EP0413650A1 EP 0413650 A1 EP0413650 A1 EP 0413650A1 EP 90470045 A EP90470045 A EP 90470045A EP 90470045 A EP90470045 A EP 90470045A EP 0413650 A1 EP0413650 A1 EP 0413650A1
Authority
EP
European Patent Office
Prior art keywords
product
cylinder
cylinders
installation according
continuous casting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90470045A
Other languages
German (de)
English (en)
French (fr)
Inventor
Philippe Blin
Yves Grandgenevre
Laurent Sosin
Christophe Ganser
Jean-Luc Jacquot
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 EP0413650A1 publication Critical patent/EP0413650A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • 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 field of direct continuous casting installations for metallic products, in particular steel, of small thickness, in which the solidification of the product is ensured by the contact between the liquid metal and the external surface of a single cylinder or of two cylinders in rotation and internally cooled energetically.
  • the object of the invention is to facilitate the operation of falling the edges of the product or even the slitting of this same product.
  • the subject of the invention is a process for the continuous casting of thin metal products, in particular steel, by solidifying the liquid metal on the cooled surface of at least one rotating cylinder, characterized in that, when solidification of the metal, on at least one face of the product a line of least mechanical resistance substantially parallel to the edges.
  • the invention also relates to an installation for implementing this process, characterized in that at least one of the cylinders has on its circumference at least one surface discontinuity.
  • this surface discontinuity is located near one of the ends of the cylinder, and is formed by a hollow etching, such as a groove, which can be filled with a thermal insulating material. In another embodiment, it consists of a raised area.
  • the falling of the edges of the product or its slitting, after casting, is carried out along the lines of least mechanical resistance formed on the product during solidification. It is thus possible to use a cutting apparatus of simpler design than in the case where the product has a uniform shear strength over its entire width.
  • the invention originates in the observation that, in a continuous casting machine on a cylinder or between two cylinders, an accidental scratching of the surface of a cylinder results in the formation of cracks and structural heterogeneities on the product during its solidification.
  • the mechanism of this formation is illustrated in FIG. 1.
  • the liquid steel 1 comes into contact with the external surface of a cylinder 2 provided with cooling means not shown, such as internal water circulation channels.
  • the extraction of heat from the liquid operated by the cylinder symbolized by the arrows 3, 3 ′, results in the formation of a layer 4 of solidified metal between the cylinder and the still liquid metal, a layer whose thickness grows as the cylinder rotates, until the completely solidified product separates from it.
  • the surface of the cylinder has a groove 5 which is sufficiently narrow so that, thanks to the phenomena of surface tension, the liquid metal cannot penetrate therein, the part of the solidified crust situated below this groove undergoes less heat extraction than the surrounding parts. In fact, unlike the surrounding parts, it does not benefit from direct contact between the crust and the cooled surface of the cylinder. It follows that, faced with groove, solidification is abnormally slow, which results in a solidified thickness less than it normally would be. This phenomenon is aggravated by the accumulation in the least solidified part of the thermomechanical stresses exerted on the crust, which causes a detachment of the crust in the vicinity of the edges of the groove. This process means that the structure of the product presents particularities where solidification took place in front of a groove. These features go in the direction of greater brittleness of the product, and are favorable to the formation of cracks, or cracks, which are unacceptable when they appear on a product intended for use. They constitute, in fact, incipient fractures.
  • the friction of the edges on the refractory walls which close the mold laterally is even sufficient to initiate the separation of the edges as soon as the product solidifies.
  • Figure 2 shows schematically a continuous casting installation between two cylinders 2, 2 ′ which, during casting, remain fixed relative to each other.
  • the pouring space is closed laterally by two refractory walls 7, 7 ′ called "small faces" applied against the ends of the cylinders, and against which the edges of the product solidify.
  • the cylinders have on their circumference in the vicinity of each of their ends, a surface discontinuity constituted by a groove 5, 5 ′, 5 ⁇ , 5 ⁇ ′. These grooves each form on the product a line of lesser mechanical resistance close to a bank, and according to which the fall of the banks will be carried out subsequently.
  • the grooves acting on the opposite faces of the same bank of the product must preferably be placed opposite one another. , so that the lines of least mechanical resistance that they define see their effects add up when the banks fall.
  • Figure 3 shows schematically a casting installation in which the cylinder 2 is fixed and the cylinder 2 ′ movable on its axis, as indicated by the arrow. These cylinders are said to be “translatable” relative to each other.
  • the small face 8 respectively 8 ′ is integral with the lateral end of the cylinder 2 respectively 2 ′ and rests in a sliding manner on the working surface of the cylinder 2 ′ respectively 2.
  • This device has the effect of allowing the width of the product to be changed , including during the casting itself. Given the multiplicity of positions that can take the cylinders relative to each other, it is not possible to groove them so as to always cooperate their respective grooves, unlike the previous case.
  • the grooves must on the one hand be sufficiently narrow and clearly drawn so that the surface tension forces prevent the liquid metal from entering the bottom of the grooves, and, on the other hand, sufficiently wide and deep to create a significant break in the mode. product cooling.
  • Possible dimensions for the grooves are of the order of 0.5 mm for the width, and 0.5 mm for the depth.
  • the section of the groove can be of any shape, such as triangular, or, preferably, substantially square or rectangular. These latter forms are in fact the most suitable for avoiding the infiltration of liquid metal into the groove, since they cause a rupture of the surface of the cylinder more straightforward than a groove of triangular section would do.
  • the groove can be filled with a heat insulating material. This makes it possible to create a line of lesser mechanical strength of greater width than with a simple groove, since this eliminates the problems of metal infiltration at the bottom of the groove.
  • the lines of least mechanical resistance must be far enough from the edges to allow the cutting tool to function properly and guarantee complete dropping of the defective parts, without however requiring the removal of an excessive amount of healthy product.
  • the dropped width can be, for example, 10 mm on either side of the product.
  • the process can also be applied to facilitate the slitting of the product.
  • grooves are formed on the cylinders, this time substantially away from the edges, so as to form on the product one or more lines of lesser mechanical resistance corresponding to the lines along which the slitting will later be carried out.
  • the transformation of a machine usually making it possible to pour a single product of 1500 mm wide into a machine making it possible ultimately to obtain two products of 750 mm wide requires only the replacement of the cylinder (s) conventional normally used by one or more cylinders having a groove on their median circumference, and the implementation of a slitting tool. This can be placed on the casting machine downstream of the cylinders, or be independent of the machine and only act on the products after their casting and winding.
  • the invention is not limited to the examples described.
  • Other means of creating lines of less mechanical resistance near the edges of the product are conceivable.
  • the general orientation of the lines of least mechanical resistance is substantially parallel to the edges, these lines may have undulations.
  • the invention is also applicable to the case where the cylinders have over their entire surface a particular roughness obtained by a series of engravings of small width and shallow depth (of the order of 0.1 mm), which aim favor the entrainment of the product by the cylinder or cylinders and improve its surface condition.
  • the grooves according to the invention which form lines of less mechanical resistance in specific areas of the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP90470045A 1989-08-18 1990-08-08 Procédé et dispositif de coulée continue directe de produits métalliques minces Withdrawn EP0413650A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911091 1989-08-18
FR8911091A FR2650966A1 (fr) 1989-08-18 1989-08-18 Procede et dispositif de coulee continue directe de produits metalliques minces

Publications (1)

Publication Number Publication Date
EP0413650A1 true EP0413650A1 (fr) 1991-02-20

Family

ID=9384827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470045A Withdrawn EP0413650A1 (fr) 1989-08-18 1990-08-08 Procédé et dispositif de coulée continue directe de produits métalliques minces

Country Status (16)

Country Link
EP (1) EP0413650A1 (cs)
JP (1) JPH0390252A (cs)
KR (1) KR910004272A (cs)
CN (1) CN1049989A (cs)
AU (1) AU6107290A (cs)
BR (1) BR9004073A (cs)
CA (1) CA2023504A1 (cs)
CS (1) CS397290A2 (cs)
DD (1) DD297088A5 (cs)
FI (1) FI904038A7 (cs)
FR (1) FR2650966A1 (cs)
HU (1) HUT57102A (cs)
IE (1) IE902962A1 (cs)
NO (1) NO903605L (cs)
PL (1) PL286526A1 (cs)
PT (1) PT95018A (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708884A1 (fr) * 1993-08-09 1995-02-17 Ishikawajima Harima Heavy Ind Procédé et appareil de coulée de bande.
EP0425402B1 (fr) * 1989-10-27 1995-08-16 USINOR SACILOR Société Anonyme Procédé et dispositif de coulée continue de produits métalliques minces entre deux cylindres

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833871B1 (fr) * 2001-12-20 2004-07-09 Usinor Procede et installation de fabrication de bandes metalliques a partir de bandes coulees directement a partir de metal liquide
CN106111923B (zh) * 2016-08-30 2018-01-16 烟台万隆真空冶金股份有限公司 一种基于附壁效应的平面流铸造用节能剥离气刀

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2137424A1 (cs) * 1971-05-19 1972-12-29 Inst Sp
US4155397A (en) * 1978-05-05 1979-05-22 General Electric Company Method and apparatus for fabricating amorphous metal laminations for motors and transformers
EP0016905A1 (en) * 1979-03-16 1980-10-15 Allied Corporation Continuous casting method and apparatus for structurally defined metallic strips
EP0040071A2 (en) * 1980-05-09 1981-11-18 Battelle Development Corporation Method of repetitiously marking continuously cast metallic strip material
US4408653A (en) * 1981-11-09 1983-10-11 Allied Corporation Method for making serrated metal ribbon
JPS6015051A (ja) * 1983-07-08 1985-01-25 Nippon Kokan Kk <Nkk> 金属板の連続鋳造装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2137424A1 (cs) * 1971-05-19 1972-12-29 Inst Sp
US4155397A (en) * 1978-05-05 1979-05-22 General Electric Company Method and apparatus for fabricating amorphous metal laminations for motors and transformers
EP0016905A1 (en) * 1979-03-16 1980-10-15 Allied Corporation Continuous casting method and apparatus for structurally defined metallic strips
EP0040071A2 (en) * 1980-05-09 1981-11-18 Battelle Development Corporation Method of repetitiously marking continuously cast metallic strip material
US4408653A (en) * 1981-11-09 1983-10-11 Allied Corporation Method for making serrated metal ribbon
JPS6015051A (ja) * 1983-07-08 1985-01-25 Nippon Kokan Kk <Nkk> 金属板の連続鋳造装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 132 (M-385)[1855], 7 juin 1985; & JP-A-60 015 051 (NIPPON KOKAN K.K.) 25-01-1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0425402B1 (fr) * 1989-10-27 1995-08-16 USINOR SACILOR Société Anonyme Procédé et dispositif de coulée continue de produits métalliques minces entre deux cylindres
FR2708884A1 (fr) * 1993-08-09 1995-02-17 Ishikawajima Harima Heavy Ind Procédé et appareil de coulée de bande.

Also Published As

Publication number Publication date
CS397290A2 (en) 1991-09-15
AU6107290A (en) 1991-02-21
CN1049989A (zh) 1991-03-20
DD297088A5 (de) 1992-01-02
FR2650966A1 (fr) 1991-02-22
PL286526A1 (en) 1991-05-06
FI904038A0 (fi) 1990-08-15
NO903605L (no) 1991-02-19
HU905044D0 (en) 1991-01-28
PT95018A (pt) 1991-04-18
JPH0390252A (ja) 1991-04-16
BR9004073A (pt) 1991-09-03
IE902962A1 (en) 1991-02-27
HUT57102A (en) 1991-11-28
KR910004272A (ko) 1991-03-28
FI904038A7 (fi) 1991-02-19
CA2023504A1 (fr) 1991-02-19
NO903605D0 (no) 1990-08-16

Similar Documents

Publication Publication Date Title
EP0894556B1 (fr) Face latérale d&#39;obturation de l&#39;espace de coulée d&#39;une installation de coulée continue entre cylindres de bandes minces métalliques
CH628260A5 (fr) Procede de coulee de lingots.
EP0413650A1 (fr) Procédé et dispositif de coulée continue directe de produits métalliques minces
EP0430840B1 (fr) Procédé et dipositif de coulée continue sur un ou entre deux cylindres
CA2013855A1 (fr) Procede et installation de coulee de produits metalliques minces a reduction d&#39;epaisseur sous la lingotiere
CA2050112C (fr) Installation de coulee continue entre cylindres
EP0350345B1 (fr) Procédé et dispositif de coulée continue de produits métalliques minces
EP0407323B1 (fr) Procédé et dispositif de coulée continue entre cylindres de produits métalliques minces aptes au laminage à froid direct
EP0403412A1 (fr) Paroi d&#39;obturation latérale pour une installation de coulée continue entre parois mobiles
EP1521650B1 (fr) Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres
EP0901851B1 (fr) Face laterale pour l&#39;obturation de l&#39;espace de coulee d&#39;une installation de coulee continue de bandes metalliques entre cylindres, et installation de coulee ainsi equipee
EP0875315B1 (fr) Installation de coulée continue de bandes métalliques entre deux cylindres
EP0709151B1 (fr) Surface de coulée d&#39;une lingotière de coulée continue des métaux à paroi mobile
EP0066524A1 (fr) Procédé et dispositif de coulée continue sur roue à gorge
WO1997014519A1 (fr) Installation de coulee continue de filaments metalliques directement a partir de metal liquide
FR2719245A1 (fr) Installation de coulée continue de filaments métalliques directement à partir de métal liquide.
FR2522287A1 (fr) Procede de fabrication de toles ou plaques d&#39;acier
EP0392952A1 (fr) Procédé et installation de coulée de produits métalliques minces
CH363316A (fr) Procédé de fabrication d&#39;un corps tubulaire et corps tubulaire obtenu par ce procédé
EP1056559A1 (fr) Lingotiere pluriangulaire de coulee continue en charge d&#39;un produit metallurgique
EP0382702A2 (fr) Procédé de fabrication d&#39;une brame mince en acier par coulée continue
FR2785211A1 (fr) Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres
FR2557821A1 (fr) Dispositif compensateur de l&#39;usure d&#39;un moule
BE837617A (fr) Procede de recuperation d&#39;une base de coulee pour lingotieres et base de coulee pour lingotieres obtenue selon ce procede
BE874171A (fr) Procede perfectionne de fabrication d&#39;une barre d&#39;acier par coulee continue

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES GB GR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910723