EP0309433A2 - Verfahren zum Stranggiessen einer Metallschmelze - Google Patents

Verfahren zum Stranggiessen einer Metallschmelze Download PDF

Info

Publication number
EP0309433A2
EP0309433A2 EP88870150A EP88870150A EP0309433A2 EP 0309433 A2 EP0309433 A2 EP 0309433A2 EP 88870150 A EP88870150 A EP 88870150A EP 88870150 A EP88870150 A EP 88870150A EP 0309433 A2 EP0309433 A2 EP 0309433A2
Authority
EP
European Patent Office
Prior art keywords
continuous casting
mold
molten metal
lubricant
ingot mold
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.)
Granted
Application number
EP88870150A
Other languages
English (en)
French (fr)
Other versions
EP0309433A3 (en
EP0309433B1 (de
Inventor
Jean-François Noville
Stéphan Wilmotte
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Priority to AT88870150T priority Critical patent/ATE85248T1/de
Publication of EP0309433A2 publication Critical patent/EP0309433A2/de
Publication of EP0309433A3 publication Critical patent/EP0309433A3/fr
Application granted granted Critical
Publication of EP0309433B1 publication Critical patent/EP0309433B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B22D11/07—Lubricating the moulds

Definitions

  • the present invention relates to a process for the continuous casting of a molten metal, particularly but not exclusively of steel.
  • Continuous casting is a casting method, known for a long time, which consists in casting a molten metal, without interruption in a bottomless ingot mold.
  • the walls of the mold are cooled vigorously; this results in rapid cooling of the cast metal and the formation of a solidified skin whose thickness increases as the metal progresses in the mold.
  • the partially solidified ingot crosses a zone, called secondary cooling, where it continues and completes its solidification.
  • the ingot mold is generally driven by a vibration movement in the direction of its longitudinal axis.
  • the surface solidification of the metal in the ingot mold brings about the presence of two different metal surfaces, being at different temperatures and animated relative to each other in a discontinuous movement.
  • the contact area of these surfaces is the site of serious friction problems.
  • the cast metal has a relatively thick solidified skin, which is at a temperature lower than that of the molten metal.
  • the inner wall of the mold only undergoes reduced heating and, due to its vigorous cooling, its temperature remains below the melting point of the powder. This inner wall is thus covered with a layer of solidified powder which is formed at the expense of the film of lubricating agent and which consequently reduces its effectiveness.
  • the object of the present invention is to propose a method of the type which is mentioned in the introduction, but which does not have the disadvantages of implementation which have just been indicated.
  • the method of the invention poses no problem for ensuring a continuous supply of the lubricant, and it does not require preheating of the latter.
  • a process for the continuous casting of a molten metal in which a lubricant is introduced into the ingot mold, through at least one passage orifice formed in the wall of said ingot mold, is characterized in that the 'a lubricating agent is used in the form of substantially spherical balls, the diameter of which is not more than 1.5 mm.
  • the diameter of said balls is between 20 ⁇ m and 800 ⁇ m.
  • said beads consist of glass, and preferably of soda-lime glass.
  • This type of glass well known in the art, is used in particular for the manufacture of flat glass.
  • said lubricating agent has a temperature at the start of softening of between 400 ° C. and 800 ° C.
  • said balls of lubricating agent are introduced via conduits inserted into the walls of the mold and opening out in the interval between the wall of the mold and the cast metal.
  • the supply of balls of lubricating agent can be ensured by a natural flow.
  • the beads consisted of a soda-lime glass having the following composition, by weight: SiO2: 71.6% Al2O3: 1% CaO: 9% Na2O: 14% MgO: 4% K2O: 0.4%. Their start softening temperature was 570 ° C.
  • the products obtained had a perfectly smooth surface, containing neither shrinkage cracks nor oscillation marks.
  • the process of the invention makes it possible to improve the surface quality of the continuously cast products; it also makes it possible to increase the casting speed, without compromising the safety of casting, that is to say without increasing the risk of breakthroughs. It thus contributes to improving the productivity of casting installations.
  • the method of the invention poses no implementation problem, since the beads used constitute an industrial product available in a wide range of particle sizes. Because of their spherical shape, the balls flow without difficulty in the conduits and they do not present a risk of abrasion of the walls of the ingot mold, even in the event of incomplete melting.
  • composition of the beads can easily be adapted, at the time of their manufacture, to take account of various conditions, such as: - suitability for softening and melting without preheating; - Ability to wet a hot surface, such as a steel skin at a temperature of the order of 1200 ° C; - viscosity low enough to ensure a good lubricating effect; - ability to flow and fill the gap between the walls of the mold and the surface of the cast product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Lubricants (AREA)
EP88870150A 1987-09-25 1988-09-15 Verfahren zum Stranggiessen einer Metallschmelze Expired - Lifetime EP0309433B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88870150T ATE85248T1 (de) 1987-09-25 1988-09-15 Verfahren zum stranggiessen einer metallschmelze.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8701090 1987-09-25
BE8701090A BE1000921A6 (fr) 1987-09-25 1987-09-25 Procede de coulee continue d'un metal fondu.

Publications (3)

Publication Number Publication Date
EP0309433A2 true EP0309433A2 (de) 1989-03-29
EP0309433A3 EP0309433A3 (en) 1990-04-25
EP0309433B1 EP0309433B1 (de) 1993-02-03

Family

ID=3882882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88870150A Expired - Lifetime EP0309433B1 (de) 1987-09-25 1988-09-15 Verfahren zum Stranggiessen einer Metallschmelze

Country Status (5)

Country Link
EP (1) EP0309433B1 (de)
JP (1) JPH01107947A (de)
AT (1) ATE85248T1 (de)
BE (1) BE1000921A6 (de)
DE (1) DE3878121T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5271452A (en) * 1987-03-26 1993-12-21 Sms Concast Inc. Continuous casting method and apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383305A (en) * 1971-03-01 1974-02-12 Bpb Industries Ltd Refractory insulation material
JPS5429967A (en) * 1977-08-08 1979-03-06 Tektronix Inc Storage target and storage tube using same
CH650425A5 (de) * 1981-05-21 1985-07-31 Alusuisse Kokille mit waermeisolierender schutzschicht.
JPS60221156A (ja) * 1984-04-17 1985-11-05 Kawasaki Steel Corp 連続鋳造方法
BE899544A (fr) * 1984-04-27 1984-08-16 Centre Rech Metallurgique Procede et dispositif pour la lubrification d'une lingotiere de couleecontinue.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5271452A (en) * 1987-03-26 1993-12-21 Sms Concast Inc. Continuous casting method and apparatus

Also Published As

Publication number Publication date
ATE85248T1 (de) 1993-02-15
EP0309433A3 (en) 1990-04-25
DE3878121D1 (de) 1993-03-18
BE1000921A6 (fr) 1989-05-16
JPH01107947A (ja) 1989-04-25
DE3878121T2 (de) 1993-08-19
EP0309433B1 (de) 1993-02-03

Similar Documents

Publication Publication Date Title
US2825947A (en) Method of continuous casting of metal
ZA200600195B (en) Method for casting composite ingot
CA1139529A (en) Method for continuous casting of metallic strands at exceptionally high speeds
EP0092477B1 (de) Verfahren und Vorrichtung zur Herstellung von Hohlblöcken aus Stahl
EP0309433B1 (de) Verfahren zum Stranggiessen einer Metallschmelze
US3710840A (en) Method for continuous casting of hollow bar
JP6629083B2 (ja) アルミニウム合金の連続鋳造方法
FR2611151A1 (fr) Dispositif de prechauffage et/ou d'obturation et de debouchage d'un orifice de coulee et procede pour sa mise en oeuvre
CA2510831C (en) Controlled fluid flow mold and molten metal casting method for improved surface
EP0160635B1 (de) Verfahren und Vorrichtung zur Schmierung einer Stranggusskokille
CA2258109C (fr) Lingotiere de coulee continue pour la coulee continue en charge verticale des metaux
US3324933A (en) Centrifugal casting
EP0448773B1 (de) Stranggussform und Stranggussverfahren
EP0904170B1 (de) Vertikal stranggusskokille mit aufsatz
FR2704786A3 (fr) Procédé de coulée continue en charge des métaux, notamment de l'acier, et lingotière pour sa mise en Óoeuvre.
EP0425402B1 (de) Verfahren und Vorrichtung zum Stranggiessen von dünnen metallischen Produkten zwischen zwei Zylindern
JP7735699B2 (ja) 水平連続鋳造装置、アルミニウム合金鋳造棒の製造方法
FR2525131A1 (fr) Procede et dispositif de fabrication d'un lingot d'acier creux
Rajagukguk et al. The Start-Up Phase of Aluminum Billet Production Using Direct Chill Casting
SU447216A1 (ru) Способ центробежного лить чугунных труб
CA2320841A1 (fr) Lingotiere pluriangulaire de coulee continue en charge d'un produit metallurgique
Mahardika The Start-Up Phase of Aluminum Billet Production Using Direct Chill Casting
RU2112623C1 (ru) Способ получения непрерывнолитых полых заготовок и устройство для его осуществления
FR2543031A2 (fr) Procede et dispositif de fabrication d'un lingot d'acier creux
FR2720307A1 (fr) Dispositif de guidage de l'acier en fusion dans un répartiteur.

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: A2

Designated state(s): AT BE DE ES FR GB IT LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE DE ES FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19900910

17Q First examination report despatched

Effective date: 19920514

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE ES FR GB IT LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930203

Ref country code: NL

Effective date: 19930203

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19930203

REF Corresponds to:

Ref document number: 85248

Country of ref document: AT

Date of ref document: 19930215

Kind code of ref document: T

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3878121

Country of ref document: DE

Date of ref document: 19930318

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930428

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EPTA Lu: last paid annual fee
26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19960801

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960813

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960816

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19960819

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960830

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19960911

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970915

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970915

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970915

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970930

BERE Be: lapsed

Owner name: CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR

Effective date: 19970930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970915

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980603

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050915