EP0345103B1 - Verfahren und Anlage zum Homogenisieren und Rekristallisieren in Linie metallischer Stranggussprodukte - Google Patents

Verfahren und Anlage zum Homogenisieren und Rekristallisieren in Linie metallischer Stranggussprodukte Download PDF

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Publication number
EP0345103B1
EP0345103B1 EP89401189A EP89401189A EP0345103B1 EP 0345103 B1 EP0345103 B1 EP 0345103B1 EP 89401189 A EP89401189 A EP 89401189A EP 89401189 A EP89401189 A EP 89401189A EP 0345103 B1 EP0345103 B1 EP 0345103B1
Authority
EP
European Patent Office
Prior art keywords
temperature
station
rolling
installation
recrystallization
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
EP89401189A
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English (en)
French (fr)
Other versions
EP0345103A1 (de
Inventor
Gérard Durand-Texte
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.)
Griset Ets
Original Assignee
Griset Ets
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Filing date
Publication date
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Priority to AT89401189T priority Critical patent/ATE100868T1/de
Publication of EP0345103A1 publication Critical patent/EP0345103A1/de
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0035—Forging or pressing devices as units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/005—Copper or its alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the present invention relates to a process and an installation for in-line homogenization and recrystallization of metallic products obtained by continuous casting.
  • the invention relates in particular to products such as strips or metal profiles and, in particular of an alloy.
  • the most common process consists in putting in a dormant furnace the coils of metal, raw casting and bringing to 700 ° C their temperature in a sufficiently long time so that one is sure that no point of the metal exceeds certain critical temperatures (reflow of phases) and to maintain this temperature long enough to be sure of the disappearance of the phases to be eliminated: this cycle is very long: twenty four hours for example.
  • the treatment time is reduced but the rolling which carries out the work hardening of the metal and the bending to put the product in reel increases the risk of creating defects in the metal since the phases which always exist in the metal and that we want to eliminate by the homogenization treatment increase the brittleness of the metal.
  • the present invention proposes to create a process for homogenization and recrystallization in line of products produced by continuous casting, in particular in the form of strips or profiles, and in particular alloy products, for example tin bronze, obtained by continuous casting, to achieve perfect homogenization of the metal and obtain a complete recrystallization corresponding to a homogeneous structure with fine grains.
  • a method according to the present invention is characterized by claim 1 and dependent claims 2 to 5.
  • the invention also relates to an installation for implementing the method, this installation being characterized in that it comprises a surface work hardening station receiving the product continuously at the outlet from casting, in order to carry out a surface work hardening, as well as an on-line heat treatment station which is crossed by the product hardened on the surface to undergo a heat treatment during its passage in this station, as well as an adjustment and control means for adjusting the profile of the temperature inside the heat treatment station.
  • the work hardening station is constituted by a pendulum or cam rolling mill, shot blasting or hydraulic press.
  • the in-line homogenization and recrystallization process consists in manufacturing a metallic product, in particular an alloy product such as a strip or a profile, in particular in copper alloy by continuous casting 1 and then pass this product online by appropriate transfer means to subject it to surface hardening 3; after work hardening, the product is subjected to a heat treatment 4.
  • This heat treatment carried out online on the product corresponds to a predetermined temperature profile.
  • This heat treatment immediately follows the surface hardening operation.
  • This work hardening on the surface can be done by a rolling of small width using rolling members carrying out movements perpendicular to the axis of the product.
  • the work hardening results in a reduction in thickness of 0.4 millimeter.
  • This hardening compresses the faces of the product or the strip. This hardening is all the more strong as it is done near the surface of the product. However, the undesirable phases are found at the surface of the product.
  • the heat treatment 4 carried out online allows the metal to be brought in a very short time, of the order of a few minutes, to a temperature directly below the melting temperature of a phase, thus avoiding damaging the metal.
  • the surface work hardening phase considerably accelerates the diffusion and makes it possible to approach very close to the critical temperature since the actual temperature of the metal is known, unlike the known methods of using an oven sleeping.
  • the diffusion speed is an exponential function of the temperature and that a gain of 30 ° C, authorized by knowing the real temperature of the metal, makes it possible to double the diffusion speed.
  • the invention makes it possible to combine the effect of work hardening of the metal and of a heat treatment at a higher temperature.
  • the heat treatment may be carried out at 800 ° C for a copper alloy containing 8% Sn and, at 840 ° C for a copper alloy containing 6% Sn. This heat treatment causes all phase changes in controlled times minimized.
  • the work hardening causes the entire recrystallization of the treated metal and this recrystallization is itself favored by the phase changes caused by the high temperatures at which the heat treatment can take place.
  • a law or a profile of product temperatures as a function of time is established; such a temperature profile may consist of a part of temperature rise, of a holding stage at a certain temperature, of a possible new temperature rise followed by a stage, etc. This makes it possible to cause in the alloy, the optimum phase changes, successive in minimized times. These phases are thus completely eliminated and the metal is recrystallized.
  • FIG. 2 is a block diagram of an installation for implementing this method.
  • This installation comprises a work hardening station 10 shown diagrammatically by two rolling rolls 11.
  • the product arrives in line in the work hardening station 10 according to arrow A to leave it according to arrow B and to pass in line through the work station.
  • the installation also includes an adjustment and control means 14 which detects and manages the work hardening station 10 as well as the heat treatment station 7.
  • the work hardening station 10 can be constituted by a pendulum or cam rolling mill or even a blasting station or a hydraulic press carrying out surface hardening.
  • the heat treatment station 7 is constituted by an oven. As the speed of diffusion in the product to be treated is accelerated by the process of the invention, this makes it possible to minimize the length of the heat treatment station 7 crossed by the product in line.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)

Claims (7)

  1. Verfahren zur Homogenisierung und zur Rekristallisierung einer Metallegierung mit mehreren Phasen, die in Linie zu einem Stranggußprodukt mit nachfolgender Kaltverformung der Oberfläche verarbeitet wird,
    in dem die Homogenisierungsstufe ein Temperaturprofil aufweist, das einen Temperaturanstieg und Temperaturstufen umfaßt, wobei die Temperatur jeder Stufe gerade unterhalb der kritischen Schmelztemperatur jeder Phase der Legierung liegt damit angesichts der exponentiellen Zunahme der Geschwindigkeit der Ausbreitung jeder so erhaltenen Phase der Abschnitt der Homogenisierung in diesem Fall sich stetig entwickeln kann.
  2. Verfahren zur aufeinanderfolgenden Homogenisierung und Rekristallisierung einer Metallegierung und Rekristallisierung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß, wenn es bei der Herstelung einer bandförmigen oder profilierten Bronze aus Zinn mit einer Stärke von 15 mm angewendet wird, eine Kaltverformung von wenigstens 0,4 mm erwirkt werden kann.
  3. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    daß das Temperaturprofil wenigstens eine Stufe mit einer oberen Temperatur von 700°C einschließt.
  4. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    daß für eine Kupferlegierung mit 8 % Zinn das Temperaturprofil wenigstens eine Temperaturstufe von 800 C enthält.
  5. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    daß für eine Kupferlegierung mit 6 % Zinn das Temperaturprofil wenigstens eine Temperaturstufe von 840 % enthält.
  6. Anlage zur Durchführung des Verfahrens nach einem der Ansprüche 1 - 5,
    dadurch gekennzeichnet,
    daß sie umfaßt:
    Anordnungen in dieser Ordnung und Antriebsvorrichtungen, um einen stetigen Serienbetrieb sicherzustellen,
    eine Anordnung zum kontinuierlichen Gießen,
    eine Anordnung (10) zur Kaltverformung der Oberfläche die das Produkt am Ausgang der Anordnung zum kontinuierlichen Gießen übernimmt, um dort eine Kaltverformung der Oberfläche zu bewirken und
    eine Anordnung zur darauffolgenden thermischen Behandlung, die vom an der Oberfläche behandelten Produkt durchquert wird, um es beim Durchgang durch diese Anordnung einer thermischen Behandlung zu unterziehen, wobei die Anordnung mehrere aufeinanderfolgende Zonen (8 - 13) mit unterschiedlichen Temperaturen enthält und eine Regel- und Steuereinrichtung (14) zur Regelung des Temperaturprofils in den Zonen im Inneren der Anordnung (7) zur Temperaturbehandlung.
  7. Anlage nach Anspruch 6,
    dadurch gekennzeichnet,
    daß die Anordnung zur Kaltverformung ausgerüstet ist mit einer Walzwerkmaschine wie einer Pendel- oder Nockenwalzmaschine, einer Anordnung zur Stahl- bzw. Sandstrahlbehandlung oder einer hydraulischen Presse.
EP89401189A 1988-06-03 1989-04-26 Verfahren und Anlage zum Homogenisieren und Rekristallisieren in Linie metallischer Stranggussprodukte Expired - Lifetime EP0345103B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401189T ATE100868T1 (de) 1988-06-03 1989-04-26 Verfahren und anlage zum homogenisieren und rekristallisieren in linie metallischer stranggussprodukte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807432A FR2632220B1 (fr) 1988-06-03 1988-06-03 Procede et installation d'homogeneisation et de recristallisation en ligne de produits metalliques obtenus par une coulee en continu
FR8807432 1988-06-03

Publications (2)

Publication Number Publication Date
EP0345103A1 EP0345103A1 (de) 1989-12-06
EP0345103B1 true EP0345103B1 (de) 1994-01-26

Family

ID=9366931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401189A Expired - Lifetime EP0345103B1 (de) 1988-06-03 1989-04-26 Verfahren und Anlage zum Homogenisieren und Rekristallisieren in Linie metallischer Stranggussprodukte

Country Status (6)

Country Link
US (1) US4957154A (de)
EP (1) EP0345103B1 (de)
JP (1) JP2812364B2 (de)
AT (1) ATE100868T1 (de)
DE (1) DE68912651T2 (de)
FR (1) FR2632220B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109848385B (zh) * 2019-03-12 2020-08-04 上海大学 一种基于电磁感应加热连铸恒温出坯的装置及方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD47997A (de) *
US2079239A (en) * 1933-08-17 1937-05-04 American Lurgi Corp Process of working copper alloys aud more particularly copper alloys containing less than about 12% tin
DE830571C (de) * 1942-05-06 1952-02-04 Wieland Werke Ag Verfahren zur Verbesserung der spanlosen Verformbarkeit von schwer verformbaren Metallen
LU34556A1 (de) * 1955-09-06
US4021271A (en) * 1975-07-07 1977-05-03 Kaiser Aluminum & Chemical Corporation Ultrafine grain Al-Mg alloy product
FR2379329A1 (fr) * 1977-02-02 1978-09-01 Pechiney Aluminium Procede de production de fil machine par coulee et laminage continus
US4422884A (en) * 1977-10-20 1983-12-27 Concast Ag Method of treating a continuously cast strand formed of stainless steel
US4243437A (en) * 1978-11-20 1981-01-06 Marion Bronze Company Process for forming articles from leaded bronzes
US4354880A (en) * 1979-10-01 1982-10-19 Southwire Company Method of forge-conditioning non-ferrous metals prior to rolling
JPS5996219A (ja) * 1982-11-22 1984-06-02 Kawasaki Steel Corp 磁気特性に優れた無方向性けい素鋼急冷薄帯の製造方法
JPS6127151A (ja) * 1984-07-17 1986-02-06 Nippon Steel Corp 連続鋳造方法及び直送圧延方法
EP0170254B1 (de) * 1984-07-31 1991-01-02 Sumitomo Metal Industries, Ltd. Verfahren und Einrichtung zur Herstellung von Stranggussbrammen
JPS61261435A (ja) * 1985-05-15 1986-11-19 Kawasaki Steel Corp 耐リジング性と張り剛性に優れる加工用薄鋼板の製造方法

Also Published As

Publication number Publication date
DE68912651D1 (de) 1994-03-10
FR2632220A1 (fr) 1989-12-08
FR2632220B1 (fr) 1992-08-21
ATE100868T1 (de) 1994-02-15
US4957154A (en) 1990-09-18
EP0345103A1 (de) 1989-12-06
JP2812364B2 (ja) 1998-10-22
JPH0225552A (ja) 1990-01-29
DE68912651T2 (de) 1994-08-25

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