[go: up one dir, main page]

EP0367716A1 - Method of continuously making an extruded profile - Google Patents

Method of continuously making an extruded profile Download PDF

Info

Publication number
EP0367716A1
EP0367716A1 EP89810758A EP89810758A EP0367716A1 EP 0367716 A1 EP0367716 A1 EP 0367716A1 EP 89810758 A EP89810758 A EP 89810758A EP 89810758 A EP89810758 A EP 89810758A EP 0367716 A1 EP0367716 A1 EP 0367716A1
Authority
EP
European Patent Office
Prior art keywords
friction wheel
strand
electromagnetic
extruded profile
pressed
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.)
Ceased
Application number
EP89810758A
Other languages
German (de)
French (fr)
Inventor
Kurt Buxmann
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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 Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Publication of EP0367716A1 publication Critical patent/EP0367716A1/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/005—Continuous extrusion starting from solid state material
    • 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
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • B22D11/015—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces using magnetic field for conformation, i.e. the metal is not in contact with a mould

Definitions

  • the invention relates to a method for the continuous production of an extruded profile, in particular made of aluminum or an aluminum alloy, a prefabricated strand being fed to a die by means of a friction wheel and pressed by the die.
  • the oxide skin surrounding each individual granule grain has a disruptive effect on the pressed product. This applies especially to higher alloyed materials which tend to undergo stronger oxidation, e.g. AlMg alloys or hard alloys of the AlZnMgCu type.
  • Pre-pressed bars usually lead to perfect product quality, but the production costs are high because an extrusion process must already be carried out. Furthermore, such bars are generally not coiled, so that feeding them into the groove of the friction wheel is difficult.
  • Properzi wire can normally only be made faultlessly with pure aluminum and very weakly alloyed materials. Furthermore, such a wire usually has structural defects such as, for example, central porosity or uneven cell structure.
  • liquid metal is poured into the groove of a cooled friction wheel and the solidified metal is subsequently pressed through a die.
  • this casting technique which is known as the CASTEX process
  • solidification takes place in the groove of the cooled friction wheel.
  • the solidification conditions are comparable to those of Properzi wire. Accordingly, similar casting problems and structural inhomogeneities also occur.
  • the edge shell that solidifies in contact with the groove is subjected to mechanical deformation due to the compression effect of the shoe. This leads to additional structural inhomogeneities, e.g. Signs of segregation, which are reflected in quality defects in the product. Otherwise, the process does not seem to be sufficiently operational for higher-alloy materials.
  • a correspondingly shaped raw product is to be manufactured continuously as a starting material and introduced into the friction wheel in the solidified state.
  • a method according to claim 1 leads to the achievement of the object according to the invention.
  • Preferred embodiments of the method according to the invention result from the further claims.
  • the method according to the invention it is possible to produce a press product of very high quality at very low cost. Due to the solidification in the electromagnetic mold, the raw material has a very fine solidification structure, so that the intermetallic phases embedded in the matrix are finer than the corresponding phases in press bars. Furthermore, the forming structure of the press products produced according to the invention is uniform, while different degrees of forming occur in pressed bars, depending on whether the beginning or end of the press is present. Corresponding differences also arise when using pre-pressed rods as the starting material.
  • Another advantage of the method according to the invention is that the entire range of commercially available aluminum alloys can be produced in this way. There are no restrictions regarding the castability of small-sized rods in the electromagnetic field.
  • a strand 2 is cast by means of an electromagnetic mold 1 and fed directly to the groove 10 of a friction wheel 4 via a pressure wheel 3.
  • the groove 10 of the friction wheel 4 is closed by means of groove covering segments 5 via a press shoe 6.
  • the necessary pressing pressure for forming a profile 9 is built up via a counter segment 8 arranged in the region of the die 7.
  • the forming speed of the friction wheel 4 is the same as the casting speed in the electromagnetic Mold 1.
  • the friction wheel 4 serves as a feed for the strand 2 solidifying in the electromagnetic mold 1.
  • the strand 2 is kept at a temperature of approximately 350 ° C. with the aid of a computer-controlled cooling process.
  • the profile 9 emerging from the friction wheel 4 can be pulled down to the required thickness tolerance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)

Abstract

In a process for continuously making an extruded profile, in particular from aluminium or an aluminium alloy, a prefabricated strand (2) is fed by means of a friction wheel (4) to a die (7) and is pressed by the latter. In this process, the molten metal is cast to form a strand (2) by means of an electromagnetic permanent mould (1) and the solidified strand (2) is fed directly to the friction wheel (4), the circumferential speed of the friction wheel (4) being identical to the casting speed in the electromagnetic permanent mould (1). …<??>High-quality extruded profiles can be produced inexpensively by this method. …<IMAGE>…

Description

Die Erfindung betrifft ein Verfahren zum kontinuierlichen Herstellen eines Strangpressprofiles, insbesondere aus Alu­minium oder einer Aluminiumlegierung, wobei ein vorgefer­tigter Strang mittels eines Reibrades einer Matrize zuge­führt und durch diese verpresst wird.The invention relates to a method for the continuous production of an extruded profile, in particular made of aluminum or an aluminum alloy, a prefabricated strand being fed to a die by means of a friction wheel and pressed by the die.

Zum kontinuierlichen Herstellen von Strangpressprofilen ist unter der Bezeichnung CONFORM ein Verfahren bekannt, bei welchem das Metall in Form von Granalien, vorgepressten Stangen oder Giesswalzdraht (Properzi-Draht) als Ausgangs­material in die Nut eines Reibrades geführt und an­schliessend durch eine Matrize verpresst wird. Die genann­ten Ausgangsmaterialien weisen jedoch gewisse Nachteile auf.For the continuous production of extruded profiles, a process is known under the name CONFORM in which the metal in the form of granules, pre-pressed bars or wire rod (Properzi wire) is fed into the groove of a friction wheel as the starting material and then pressed through a die. However, the starting materials mentioned have certain disadvantages.

Bei Granalien wirkt sich die jedes einzelne Granalienkorn umgebende Oxydhaut störend am gepressten Produkt aus. Dies gilt vor allem für höherlegierte Werkstoffe, welche zu ei­ner stärkeren Oxydation neigen, z.B. AlMg-Legierungen oder Hartlegierungen des Typs AlZnMgCu.In the case of granules, the oxide skin surrounding each individual granule grain has a disruptive effect on the pressed product. This applies especially to higher alloyed materials which tend to undergo stronger oxidation, e.g. AlMg alloys or hard alloys of the AlZnMgCu type.

Vorgepresste Stangen führen normalerweise zu einwandfreien Produktqualitäten, jedoch sind die Gestehungskosten hoch, weil bereits ein Strangpressvorgang vorgeschaltet werden muss. Weiterhin sind solche Stangen im allgemeinen nicht aufgehaspelt, so dass deren Zufuhr in die Nut des Reibrades schwierig ist.Pre-pressed bars usually lead to perfect product quality, but the production costs are high because an extrusion process must already be carried out. Furthermore, such bars are generally not coiled, so that feeding them into the groove of the friction wheel is difficult.

Properzi-Draht lässt sich normalerweise nur mit Reinalumi­nium und sehr schwach legierten Werkstoffen fehlerfrei her­stellen. Weiterhin hat ein solcher Draht üblicherweise Ge­fügefehler wie z.B. zentrale Porosität oder ungleichmässi­ges Zellgefüge.Properzi wire can normally only be made faultlessly with pure aluminum and very weakly alloyed materials. Furthermore, such a wire usually has structural defects such as, for example, central porosity or uneven cell structure.

Der Einsatz von konventionell gegossenen Stangen führt bei höherlegierten Werkstoffen zu Qualitätsproblemen, weil diese Stangen normalerweise eine ca. 1mm dicke angeseigerte Randzone besitzen, welche sich im Reibrad aufstaucht und zu Presseinzug führt.The use of conventionally cast rods leads to quality problems with higher-alloyed materials, because these rods usually have an approx. 1mm thick, raised edge zone, which shows up in the friction wheel and leads to press-in.

Bei einem anderen bekannten, kontinuierlich arbeitenden Verfahren wird flüssiges Metall in die Nut eines gekühlten Reibrades gegossen und das verfestigte Metall nachfolgend durch eine Matrize verpresst. Bei dieser als CASTEX-Ver­fahren gekennzeichneten Giesstechnik erfolgt die Erstarrung in der Nut des gekühlten Reibrades. Die Erstarrungsbedin­gungen sind vergleichbar mit denjenigen von Properzi-­Draht. Dementsprechend treten auch ähnliche giesstechnische Probleme und Gefügeinhomogenitäten auf. Weiterhin wird die im Kontakt mit der Nut erstarrende Randschale aufgrund der Stauchwirkung des Schuhs einer mechanischen Umformung un­terzogen. Dies führt zu zusätzlichen Gefügeinhomogenitäten, z.B. Seigerungserscheinungen, welche sich als Qualitätsmän­gel im Produkt niederschlagen. Im übrigen scheint das Ver­fahren bei höherlegierten Werkstoffen noch nicht genügend betriebsreif zu sein.In another known, continuously operating method, liquid metal is poured into the groove of a cooled friction wheel and the solidified metal is subsequently pressed through a die. In this casting technique, which is known as the CASTEX process, solidification takes place in the groove of the cooled friction wheel. The solidification conditions are comparable to those of Properzi wire. Accordingly, similar casting problems and structural inhomogeneities also occur. Furthermore, the edge shell that solidifies in contact with the groove is subjected to mechanical deformation due to the compression effect of the shoe. This leads to additional structural inhomogeneities, e.g. Signs of segregation, which are reflected in quality defects in the product. Otherwise, the process does not seem to be sufficiently operational for higher-alloy materials.

Angesichts dieser Gegebenheiten hat sich der Erfinder das Ziel gesetzt, Pressprofile mit Hilfe eines Reibrades quali­tativ hochwertig sowie kostengünstig herzustellen. Hierbei soll ein entsprechend geformtes Rohprodukt als Ausgangs­material kontinuierlich gefertigt und im erstarrten Zustand in das Reibrad eingeführt werden.In view of these circumstances, the inventor has set himself the goal of producing press profiles with the help of a friction wheel of high quality and at low cost. Here, a correspondingly shaped raw product is to be manufactured continuously as a starting material and introduced into the friction wheel in the solidified state.

Zur erfindungsgemässen Lösung der Aufgabe führt ein Verfah­ren gemäss Anspruch 1. Bevorzugte Ausführungsformen des er­findungsgemässen Verfahrens ergeben sich aus den weiteren Ansprüchen.A method according to claim 1 leads to the achievement of the object according to the invention. Preferred embodiments of the method according to the invention result from the further claims.

Mit dem erfindungsgemässen Verfahren gelingt es, mit sehr niedrigen Kosten ein Pressprodukt von sehr hoher Qualität zu erzeugen. Aufgrund der Erstarrung in der elektromagne­tischen Kokille besitzt das Rohmaterial ein sehr feines Er­starrungsgefüge, so dass die in der Matrix eingebetteten intermetallischen Phasen feiner sind als die entsprechenden Phasen in Pressstangen. Weiterhin ist das Umformgefüge der erfindungsgemäss hergestellten Pressprodukte gleichmässig, während bei gepressten Stangen unterschiedliche Umformgrade auftreten, je nachdem, ob der Pressanfang oder das Pressen­de vorliegt. Entsprechende Unterschiede ergeben sich auch beim Einsatz von vorgepressten Stangen als Ausgangsmateri­al.With the method according to the invention, it is possible to produce a press product of very high quality at very low cost. Due to the solidification in the electromagnetic mold, the raw material has a very fine solidification structure, so that the intermetallic phases embedded in the matrix are finer than the corresponding phases in press bars. Furthermore, the forming structure of the press products produced according to the invention is uniform, while different degrees of forming occur in pressed bars, depending on whether the beginning or end of the press is present. Corresponding differences also arise when using pre-pressed rods as the starting material.

Ein weiterer Vorteil des erfindungsgemässen Verfahrens liegt darin, dass die gesamte Palette der marktüblichen Aluminiumlegierungen auf diese Weise herstellbar ist. Be­züglich Giessbarkeit von kleinformatigen Stangen im elek­tromagnetischen Feld gibt es keine Einschränkungen.Another advantage of the method according to the invention is that the entire range of commercially available aluminum alloys can be produced in this way. There are no restrictions regarding the castability of small-sized rods in the electromagnetic field.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines be­vorzugten Ausführungsbeispiels sowie anhand der Zeichnung; diese zeigt in ihrer einzigen Figur eine Vorrichtung zur Durchführung des erfindungsgemässen Verfahrens im Quer­schnitt in schematischer Darstellung.Further advantages, features and details of the invention result from the following description of a preferred exemplary embodiment and from the drawing; in its single figure, this shows a device for carrying out the method according to the invention in cross section in a schematic representation.

Mittels einer elektromagnetischen Kokille 1 wird ein Strang 2 vergossen und über ein Anpressrad 3 unmittelbar der Nut 10 eines Reibrades 4 zugeführt. Die Nut 10 des Reibrades 4 wird mittels Nutabdecksegmenten 5 über einen Presschuh 6 geschlossen. Ueber ein im Bereich der Matrize 7 angeordne­tes Gegensegment 8 wird der notwendige Pressdruck zur Aus­formung eines Profiles 9 aufgebaut.A strand 2 is cast by means of an electromagnetic mold 1 and fed directly to the groove 10 of a friction wheel 4 via a pressure wheel 3. The groove 10 of the friction wheel 4 is closed by means of groove covering segments 5 via a press shoe 6. The necessary pressing pressure for forming a profile 9 is built up via a counter segment 8 arranged in the region of the die 7.

Die Umformgeschwindigkeit des Reibrades 4 ist gleich gross wie die Giessgeschwindigkeit in der elektromagnetischen Kokille 1. Das Reibrad 4 dient als Vorschub für den in der elektromagnetischen Kokille 1 erstarrenden Strang 2.The forming speed of the friction wheel 4 is the same as the casting speed in the electromagnetic Mold 1. The friction wheel 4 serves as a feed for the strand 2 solidifying in the electromagnetic mold 1.

Zur Reduzierung der Umformarbeit im Reibrad 4 wird der Strang 2 mit Hilfe eines computergesteuerten Kühlverfahrens auf einer Temperatur von etwa 350°C gehalten.To reduce the forming work in the friction wheel 4, the strand 2 is kept at a temperature of approximately 350 ° C. with the aid of a computer-controlled cooling process.

Bei Verwendung eines -- in der Zeichnung nicht dargestell­ten -- Ziehsteins in Linie mit dem Reibrad 4 kann das aus dem Reibrad 4 austretende Profil 9 auf die geforderte Dickentoleranz heruntergezogen werden.When using a drawing die - not shown in the drawing - in line with the friction wheel 4, the profile 9 emerging from the friction wheel 4 can be pulled down to the required thickness tolerance.

Claims (4)

1. Verfahren zum kontinuierlichen Herstellen eines Strang­pressprofiles, insbesondere aus Aluminium oder einer Aluminiumlegierung, wobei ein vorgefertigter Strang (2) mittels eines Reibrades (4) einer Matrize (7) zugeführt und durch diese verpresst wird,
dadurch gekennzeichnet,
dass eine Metallschmelze mittels einer elektromagneti­schen Kokille (1) zu einem Strang (2) vergossen und der erstarrte Strang (2) unmittelbar dem Reibrad (4) zuge­führt wird, wobei die Umfanggeschwindigkeit des Reib­rades (4) gleich gross ist wie die Giessgeschwindigkeit in der elektromagnetischen Kokille (1).1. A method for the continuous production of an extruded profile, in particular of aluminum or an aluminum alloy, wherein a prefabricated strand (2) is fed to a die (7) by means of a friction wheel (4) and pressed by the latter,
characterized,
that a metal melt is cast into a strand (2) by means of an electromagnetic mold (1) and the solidified strand (2) is fed directly to the friction wheel (4), the peripheral speed of the friction wheel (4) being the same as the casting speed in the electromagnetic Chill mold (1). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Temperatur des Strangs (2) beim Eintritt in das Reibrad (4) oberhalb 250°C liegt.2. The method according to claim 1, characterized in that the temperature of the strand (2) when entering the friction wheel (4) is above 250 ° C. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeich­net, dass das Reibrad (4) als Vorschub für den in der elektromagnetischen Kokille (1) erstarrenden Strang (2) dient.3. The method according to claim 1 or 2, characterized in that the friction wheel (4) serves as a feed for the strand (2) solidifying in the electromagnetic mold (1). 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch ge­kennzeichnet, dass das aus dem Reibrad (4) austretende Profil (10) mittels eines in Linie mit dem Reibrad (4) angeordneten Ziehsteins auf die geforderte Dickentole­ranz gezogen wird.4. The method according to any one of claims 1 to 3, characterized in that the profile (10) emerging from the friction wheel (4) is drawn to the required thickness tolerance by means of a drawing die arranged in line with the friction wheel (4).
EP89810758A 1988-10-31 1989-10-04 Method of continuously making an extruded profile Ceased EP0367716A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH405088 1988-10-31
CH4050/88 1988-10-31

Publications (1)

Publication Number Publication Date
EP0367716A1 true EP0367716A1 (en) 1990-05-09

Family

ID=4268882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810758A Ceased EP0367716A1 (en) 1988-10-31 1989-10-04 Method of continuously making an extruded profile

Country Status (3)

Country Link
US (1) US5052470A (en)
EP (1) EP0367716A1 (en)
NO (1) NO894312L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049369B4 (en) * 2005-10-12 2008-11-20 Technische Universität Clausthal Process for the production of fine-grained, polycrystalline materials or workpieces and extrusion presses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2602397B2 (en) * 1993-03-04 1997-04-23 有限会社矢野エンジニアリング Extrusion processing equipment
US6531039B2 (en) 2001-02-21 2003-03-11 Nikko Materials Usa, Inc. Anode for plating a semiconductor wafer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1499809A (en) * 1975-01-24 1978-02-01 Bicc Ltd Method of and apparatus for continuously forming metal ro
GB1516306A (en) * 1975-08-29 1978-07-05 Bicc Ltd Method of and apparatus for continuously forming a flexible elongate metallic member
EP0244254A1 (en) * 1986-05-01 1987-11-04 Alform Alloys Limited Extrusion of metals
US4763502A (en) * 1982-09-09 1988-08-16 Amf - Aluteam Metal Forming Gmbh Method and a device for pretreating nonferrous metal for plastic deformation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53135868A (en) * 1977-04-30 1978-11-27 Hitachi Cable Ltd Method and apparatus for manufacture of composite wire
JPS60148651A (en) * 1984-01-13 1985-08-05 Kawasaki Steel Corp Continuous casting machine
US4718476A (en) * 1986-02-14 1988-01-12 Blaw Knox Corporation Method and apparatus for extrusion casting
JPH0628784B2 (en) * 1986-02-15 1994-04-20 新日本製鐵株式会社 Manufacturing method of continuous cast slab for thick steel plate with excellent internal soundness

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1499809A (en) * 1975-01-24 1978-02-01 Bicc Ltd Method of and apparatus for continuously forming metal ro
GB1516306A (en) * 1975-08-29 1978-07-05 Bicc Ltd Method of and apparatus for continuously forming a flexible elongate metallic member
US4763502A (en) * 1982-09-09 1988-08-16 Amf - Aluteam Metal Forming Gmbh Method and a device for pretreating nonferrous metal for plastic deformation
EP0244254A1 (en) * 1986-05-01 1987-11-04 Alform Alloys Limited Extrusion of metals

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 6 (M-50)[678], 16. Januar 1981; & JP-A-55 139 113 (FURUKAWA DENKI KOGYO K.K.) 30-10-1980 *
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 207 (M-242)[1352], 13. September 1983; JP-A-58 103 908 (SUMITOMO DENKI KOGYO K.K.) 21-06-1983 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 90 (M-292)[1572], 25. April 1984; & JP-A-59 007 420 (SUMITOMO DENKI KOGYO K.K.) 14-01-1984 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049369B4 (en) * 2005-10-12 2008-11-20 Technische Universität Clausthal Process for the production of fine-grained, polycrystalline materials or workpieces and extrusion presses

Also Published As

Publication number Publication date
US5052470A (en) 1991-10-01
NO894312L (en) 1990-05-02
NO894312D0 (en) 1989-10-30

Similar Documents

Publication Publication Date Title
DE3382585T2 (en) FINE GRAIN METAL COMPOSITION.
DE69508581T3 (en) METHOD AND DEVICE FOR INJECTION MOLDING METALS IN SEMI-SOLID CONDITION
DE69702037T2 (en) Manufacture of hollow castings from thixotropic metal alloys using gas pressure
DE69610132T2 (en) Die casting process
DE60107690T2 (en) METHOD AND DEVICE FOR PRODUCING METAL ALLOY CASTORS
DE69516118T2 (en) Process for superplastic extrusion
DE2514386A1 (en) PROCESS FOR IMPROVING THE FORMABILITY OF LIGHT METAL ALLOYS
DE3782431T2 (en) THIXOTROPICAL MATERIALS.
DE2163190A1 (en) Process for making metal strips from metal powder
EP0718059A1 (en) Oxide remover
DE1775322A1 (en) Plain bearings with finely divided aluminum as the basic material and process and for its production
EP0554808B1 (en) Method to produce metal parts
DE69523720T2 (en) Process for the production of a metallic ingot for plastic forming
EP0839589A1 (en) Method for producing a metallic profiled strand
DE69001845T2 (en) Thin sheets of titanium-aluminum intermetallic compound and process for their manufacture.
DE3818077A1 (en) METHOD FOR CONTINUOUS CASTING ROLLERS
DE2929845A1 (en) METHOD OF FORMING A METAL ALLOY
AT509895A1 (en) continuous casting
DE60221175T2 (en) Method and device for producing plate-shaped metallic materials
DD154106A5 (en) METHOD AND DEVICE FOR CONTINUOUS CASTING AND CONNECTING HOT ROLLING OF A COPPER STRUCTURE
EP3570996B1 (en) Continuous extrusion process for a metal-containing bulk material and metal-powder extrusion installation
EP0367716A1 (en) Method of continuously making an extruded profile
EP1012353B1 (en) Alloy and method for producing objects therefrom
DE69018740T2 (en) Vertical continuous casting process and casting device.
DE2406252C3 (en) Method and device for continuous casting and further processing of the cast strand

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 ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19901018

17Q First examination report despatched

Effective date: 19920319

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19930603