EP0345103B1 - Process and installation for in-line homogenizing and recrystallization of continuously cast metallic products - Google Patents
Process and installation for in-line homogenizing and recrystallization of continuously cast metallic products Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001953 recrystallisation Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 title claims description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000009749 continuous casting Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 229910000906 Bronze Inorganic materials 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 239000010974 bronze Substances 0.000 claims description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims 2
- 239000002184 metal Substances 0.000 abstract description 20
- 229910052751 metal Inorganic materials 0.000 abstract description 20
- 238000000265 homogenisation Methods 0.000 abstract description 9
- 238000010622 cold drawing Methods 0.000 abstract 1
- 238000005482 strain hardening Methods 0.000 description 16
- 238000005266 casting Methods 0.000 description 7
- 229910052718 tin Inorganic materials 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
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
- B22D11/12—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)
- Continuous Casting (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
La présente invention concerne un procédé et une installation d'homogénéisation et de recristallisation en ligne de produits métalliques obtenus par une coulée en continu.The present invention relates to a process and an installation for in-line homogenization and recrystallization of metallic products obtained by continuous casting.
L'invention concerne notamment des produits tels que des bandes ou des profilés métalliques et, en particulier en un alliage.The invention relates in particular to products such as strips or metal profiles and, in particular of an alloy.
Le cas se présente surtout pour du bronze à l'étain qui, à l'état brut de coulée, contient, outre la solution solide α, les phases β, δ et γ.The case arises especially for tin bronze which, in the raw state of casting, contains, in addition to the solid solution α, the phases β, δ and γ.
Différents procédés existent pour homogénéiser et recristalliser le bronze à l'étain.Different methods exist for homogenizing and recrystallizing tin bronze.
Le procédé le plus courant consiste à mettre dans un four dormant les bobines de métal, brutes de coulée et de porter à 700°C environ leur température dans un temps suffisamment long pour que l'on soit sûr qu'aucun point du métal ne dépasse certaines températures critiques (refusion de phases) et de maintenir cette température suffisamment longtemps pour que l'on soit sûr de la disparition des phases à éliminer : ce cycle est très long : vingt quatre heure par exemple.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.
Il est également connu d'écrouir le métal brut de coulée pour diminuer le temps de traitement et améliorer l'homogénéisation. Cet écrouissage se fait sur l'ensemble du produit de coulée et se traduit par une réduction d'épaisseur importante, réduisant par exemple une bande de 15 millimètres à 10 millimètres.It is also known to harden metal raw casting to decrease the processing time and improve homogenization. This work hardening is carried out on the whole of the casting product and results in a significant reduction in thickness, reducing for example a strip from 15 millimeters to 10 millimeters.
Grâce à l'écrouissage, le temps de traitement est réduit mais le laminage qui réalise l'écrouissage du métal et le cintrage pour mettre le produit en bobine aggrave le risque de créer des défauts dans le métal puisque les phases qui existent toujours dans le métal et que l'on veut éliminer par le traitement d'homogénéisation augmentent la fragilité du métal.Thanks to the work hardening, 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.
Les deux procédés ci-dessus sont des procédés discontinus puisque l'installation servant à réaliser l'homogénéisation n'est pas placée en ligne sur l'installation de coulée.The two above methods are discontinuous since the installation used to carry out the homogenization is not placed in line on the casting installation.
Il existe un troisième procédé pour effectuer une homogénéisation en ligne. Le produit passe ainsi non pas en bobine dans un four mais à plat. Pour cela, il faut un four d'une certaine longueur placé directement à la sortie de l'installation de coulée en continu. L'inconvénient de ce procédé est de se traduire par des longueurs de fours importantes ; l'avantage est que ce procédé évite la reprise et diminue le risque de création de défauts de cintrage puisque le cintrage des produits, pour les mettre par exemple en bobine, n'est effectué qu'après le traitement, lorsque le produit est suffisamment homogène.There is a third method for performing homogenization online. The product thus passes not on a reel in an oven but flat. This requires an oven of a certain length placed directly at the outlet of the continuous casting installation. The disadvantage of this process is that it results in long oven lengths; the advantage is that this process avoids recovery and reduces the risk of creating bending defects since the bending of the products, to put them, for example, in a coil, is only carried out after the treatment, when the product is sufficiently homogeneous .
En conclusion, aucun des procédés ci-dessus ne permet de modifier sensiblement la structure cristallographique de l'alliage qui reste une structure brute de coulée.In conclusion, none of the above methods makes it possible to substantially modify the crystallographic structure of the alloy which remains a raw casting structure.
La présente invention se propose de créer un procédé d'homogénéisation et de recristallisation en ligne de produits réalisés par coulée en continu, notamment sous forme de bandes ou de profilés, et en particulier des produits en alliages, par exemple en bronze à l'étain, obtenus par une coulée en continu, pour réaliser une homogénéisation parfaite du métal et obtenir une recristallisation complète correspondant à une structure homogène à grains fins.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.
Dans le document US-A-4 243 437 un procédé et un dispositif sont décrits dans lesquels du bronze coulé en bandes continues est d'abord coupé en plaques puis écrouit et enfin traité thermiquement par recuit ; les températures de recuit varient suivant l'alliage et le degré de recristallisation désirés mais en aucun cas une température supérieure à 675°C (1 250 degrés Fahrenheit, colonne 10, lignes 10-13) n'est envisagée.In document US-A-4 243 437 a method and a device are described in which bronze cast in continuous strips is first cut into plates then hardens and finally heat-treated by annealing; the annealing temperatures vary according to the alloy and the degree of recrystallization desired but in no case a temperature higher than 675 ° C (1250 degrees Fahrenheit,
Un procédé selon la présente invention, est caractérisé par la revendication 1 et les revendications dépendantes 2 à 5.A method according to the present invention, is characterized by claim 1 and dependent claims 2 to 5.
L'invention concerne également une installation pour la mise en oeuvre du procédé, cette installation étant caractérisée en ce qu'elle comporte un poste d'écrouissage de surface recevant le produit en sortie de coulée en continu, pour y effectuer un écrouissage de surface, ainsi qu'un poste de traitement thermique en ligne qui est traversé par le produit écroui en surface pour y subir un traitement thermique au cours de son passage dans ce poste, ainsi qu'un moyen de réglage et de commande pour régler le profil de la température à l'intérieur du poste de traitement thermique.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.
Suivant une autre caractéristique de l'invention, le poste d'écrouissage est constitué par un laminoir pendulaire ou à came, à grenaillage ou une presse hydraulique.According to another characteristic of the invention, the work hardening station is constituted by a pendulum or cam rolling mill, shot blasting or hydraulic press.
La présente invention sera décrite plus en détail à l'aide d'un exemple de mise en oeuvre de procédé et d'une installation représentées dans les dessins annexés, dans lesquels :
- la figure 1 est un schéma de principe du procédé de l'invention,
- la figure 2 est un schéma de principe d'une installation pour la mise en oeuvre du procédé.
- FIG. 1 is a block diagram of the process of the invention,
- Figure 2 is a block diagram of an installation for implementing the method.
Selon la figure 1, le procédé d'homogénéisation et de recristallisation en ligne consiste à fabriquer un produit métallique, notamment un produit en alliage tel qu'une bande ou un profilé, en particulier en alliage de cuivre par une coulée en continu 1 puis de faire passer ce produit en ligne par des moyens de transfert appropriés pour lui faire subir un écrouissage de surface 3 ; après l'écrouissage, le produit est soumis à un traitement thermique 4. Ce traitement thermique effectué en ligne sur le produit correspond à un profil de température prédéterminé. Ce traitement thermique suit immédiatement l'opération d'écrouissage en surface. Cet écrouissage en surface peut se faire par un laminage de faible largeur à l'aide d'organes de laminage effectuant des mouvements perpendiculaires à l'axe du produit. A titre d'exemple, pour un produit en forme de bande ayant une épaisseur 15 millimètres, l'écrouissage se traduit par une diminution d'épaisseur de 0,4 millimètre. Cet écrouissage met en compression les faces du produit ou de la bande. Cet écrouissage est d'autant plus fort qu'il se fait près de la surface du produit. Or, les phases indésirables se trouvent au niveau de la surface du produit.According to FIG. 1, 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. For example, for a strip-shaped product having a thickness of 15 millimeters, 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.
Comme cet écrouissage de surface engendre des lacunes dans le métal du produit, cela va augmenter considérablement la vitesse de diffusion tout en provoquant, pendant la chauffe, la recristallisation du métal. Il convient de souligner que l'écrouissage se faisant en surface, le coeur du produit n'est pas écroui, ce qui évite tout risque d'engendrer des défauts.As this surface hardening causes gaps in the metal of the product, this will increase considerably the diffusion speed while causing, during heating, the recrystallization of the metal. It should be emphasized that the hardening being done on the surface, the core of the product is not hardened, which avoids any risk of causing defects.
Le traitement thermique 4 effectué en ligne permet de porter en un temps très court, de l'ordre de quelques minutes, le métal à une température directement inférieure à la température de fusion d'une phase évitant ainsi de détériorer le métal. On choisira, par exemple, une température de 700°C pour le bronze.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. We will choose, for example, a temperature of 700 ° C for bronze.
Comme indiqué ci-dessus, la phase d'écrouissage de surface accélère considérablement la diffusion et permet de s'approcher de très près de la température critique puisque l'on connaît la température réelle du métal, contrairement aux procédés connus consistant à utiliser un four dormant.As indicated above, 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.
Il convient de souligner que la vitesse de diffusion est une fonction exponentielle de la température et qu'un gain de 30°C, autorisé par la connaissance de la température réelle du métal, permet de doubler la vitesse de diffusion. Ainsi, l'invention permet de cumuler l'effet de l'écrouissage du métal et d'un traitement thermique à une température plus élevée. A titre d'exemple, on pourra effectuer le traitement thermique à 800°C pour un alliage de cuivre contenant 8 % de Sn et, à 840°C pour un alliage de cuivre contenant 6 % de Sn. Ce traitement thermique provoque tous les changements de phase dans les temps contrôlés réduits au minimum. L'écrouissage provoque la recristallisation entière du métal traité et cette recristallisation est, elle-même, favorisée par les changements de phase engendrés par les températures élevées auxquelles peut se faire le traitement thermique.It should be emphasized that 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. Thus, the invention makes it possible to combine the effect of work hardening of the metal and of a heat treatment at a higher temperature. For example, 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.
Suivant les alliages à traiter, on établit une loi ou un profil de températures du produit en fonction du temps ; un tel profil de températures peut se composer d'une partie de montée en température, d'un palier de maintien à une certaine température, d'une éventuelle nouvelle montée en température suivie d'un palier etc... Cela permet de provoquer dans l'alliage, les changements de phase optimum, successifs dans des temps réduits au minimum. On fait ainsi disparaître, totalement, ces phases et on provoque la recristallisation du métal.Depending on the alloys to be treated, 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.
La figure 2 est un schéma de principe d'une installation pour la mise en oeuvre de ce procédé. Cette installation comporte un poste d'écrouissage 10 schématisé par deux cylindres de laminage 11. Le produit arrive en ligne dans le poste d'écrouissage 10 suivant la flèche A pour en sortir suivant la flèche B et pour passer en ligne à travers le poste de traitement thermique 7, par exemple constitué par un four dans lequel sont définies plusieurs zones 8-13 à des températures différentes. L'installation comporte, également, un moyen de réglage et de commande 14 qui détecte et gère le poste d'écrouissage 10 ainsi que le poste de traitement thermique 7.Figure 2 is a block diagram of an installation for implementing this method. This installation comprises a
Le poste d'écrouissage 10 peut être constitué par un laminoir pendulaire ou à came ou encore un poste de grenaillage ou une presse hydraulique réalisant l'écrouissage de surface.The
Le poste de traitement thermique 7 est constitué par un four. Comme la vitesse de diffusion dans le produit à traiter est accéléré grâce au procédé de l'invention, cela permet de réduire au minimum la longueur du poste de traitement thermique 7 traversé par le produit en ligne.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.
Claims (7)
- Process for in-line homogenizing and recrystallization of a continuously cast metallic alloy, followed by a surface temper-rolling stage, hence the presence of several phases, in which the homogenizing stage has a temperature profile which includes temperature rises and temperature plateaus, the temperature of each plateau being directly lower than the critical melting temperature of each phase of the alloy so that, owing to the exponential increase in the speed of diffusion of each phase thus obtained, the homogenizing stage may then proceed uninterrupted.
- Process for in-line homogenizing and recrystallization of a metallic alloy according to Claim 1, characterized in that it applies to the production of a tin bronze in the form of a strip or a profiled section, having a thickness of 15 mm and which undergoes a temper rolling of at least 0.4 mm.
- Process according to Claim 2, characterized in that the temperature profile includes at least one plateau with a temperature greater than 700°C.
- Process according to Claim 1, characterized in that, in the case of a copper alloy with 8% tin, the temperature profile includes at least one plateau at 800°C.
- Process according to Claim 1, characterized in that, in the case of a copper alloy with 6% tin, the temperature profile includes at least one plateau at 840°C.
- Installation for implementing the process according to any one of Claims 1 to 5, characterized in that it includes, disposed in this order and arranged for uninterrupted operation, a continuous casting station, a surface temper-rolling station (10) receiving the product exiting continuous casting in order to perform thereon a surface temper rolling, and an in-line heat treatment station (7) which is traversed by the surface temper-rolled product so that it undergoes a heat treatment during its passage through this station, which includes several successive zones (8-13) at different temperatures, and an adjustment and control means (14) for controlling the profile of the temperature of the zones inside the heat-treatment station (7).
- Installation according to Claim 6, characterized in that the temper-rolling station consists of a pendulum or cam mill, a shot-blasting mill or a hydraulic press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89401189T ATE100868T1 (en) | 1988-06-03 | 1989-04-26 | PROCESS AND PLANT FOR HOMOGENIZING AND RE-CRYSTALIZING IN LINE METALLIC CONTINUOUS CASTING PRODUCTS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8807432 | 1988-06-03 | ||
| FR8807432A FR2632220B1 (en) | 1988-06-03 | 1988-06-03 | METHOD AND INSTALLATION FOR ONLINE HOMOGENEIZATION AND RECRYSTALLIZATION OF METAL PRODUCTS OBTAINED BY CONTINUOUS CASTING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0345103A1 EP0345103A1 (en) | 1989-12-06 |
| EP0345103B1 true EP0345103B1 (en) | 1994-01-26 |
Family
ID=9366931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89401189A Expired - Lifetime EP0345103B1 (en) | 1988-06-03 | 1989-04-26 | Process and installation for in-line homogenizing and recrystallization of continuously cast metallic products |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4957154A (en) |
| EP (1) | EP0345103B1 (en) |
| JP (1) | JP2812364B2 (en) |
| AT (1) | ATE100868T1 (en) |
| DE (1) | DE68912651T2 (en) |
| FR (1) | FR2632220B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848385B (en) * | 2019-03-12 | 2020-08-04 | 上海大学 | Device and method for continuous casting constant-temperature blank ejection based on electromagnetic induction heating |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD47997A (en) * | ||||
| 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 (en) * | 1942-05-06 | 1952-02-04 | Wieland Werke Ag | Process for improving the non-cutting deformability of metals that are difficult to deform |
| LU34556A1 (en) * | 1955-09-06 | |||
| US4021271A (en) * | 1975-07-07 | 1977-05-03 | Kaiser Aluminum & Chemical Corporation | Ultrafine grain Al-Mg alloy product |
| FR2379329A1 (en) * | 1977-02-02 | 1978-09-01 | Pechiney Aluminium | CONTINUOUS DIE AND LAMINATE MACHINE WIRE PRODUCTION PROCESS |
| 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 (en) * | 1982-11-22 | 1984-06-02 | Kawasaki Steel Corp | Manufacture of rapidly cooled nondirectionally oriented thin silicon steel strip with superior magnetic characteristic |
| JPS6127151A (en) * | 1984-07-17 | 1986-02-06 | Nippon Steel Corp | Continuous casting method and direct rolling method |
| EP0170254B1 (en) * | 1984-07-31 | 1991-01-02 | Sumitomo Metal Industries, Ltd. | Method and apparatus of processing continuously cast slabs |
| JPS61261435A (en) * | 1985-05-15 | 1986-11-19 | Kawasaki Steel Corp | Production of thin steel sheet for working having excellent ridging resistance and tensile rigidity |
-
1988
- 1988-06-03 FR FR8807432A patent/FR2632220B1/en not_active Expired - Fee Related
-
1989
- 1989-04-26 AT AT89401189T patent/ATE100868T1/en not_active IP Right Cessation
- 1989-04-26 EP EP89401189A patent/EP0345103B1/en not_active Expired - Lifetime
- 1989-04-26 DE DE68912651T patent/DE68912651T2/en not_active Expired - Fee Related
- 1989-05-08 US US07/348,816 patent/US4957154A/en not_active Expired - Lifetime
- 1989-05-31 JP JP1136274A patent/JP2812364B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US4957154A (en) | 1990-09-18 |
| FR2632220B1 (en) | 1992-08-21 |
| DE68912651D1 (en) | 1994-03-10 |
| DE68912651T2 (en) | 1994-08-25 |
| JPH0225552A (en) | 1990-01-29 |
| ATE100868T1 (en) | 1994-02-15 |
| FR2632220A1 (en) | 1989-12-08 |
| EP0345103A1 (en) | 1989-12-06 |
| JP2812364B2 (en) | 1998-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1058588B1 (en) | Installation for making cold-rolled stainless steel bands | |
| JPH0671303A (en) | Production of aluminum alloy sheet | |
| US5140837A (en) | Process for rolling soft metals | |
| WO2009123059A1 (en) | Method for rolling cu-ga alloy | |
| EP0345103B1 (en) | Process and installation for in-line homogenizing and recrystallization of continuously cast metallic products | |
| FR2511046A1 (en) | PROCESS FOR THE PRODUCTION OF ELECTROMAGNETIC STEEL ORIENTED STEEL SHEET OR BAND AND THE SAME OR BAND THUS OBTAINED | |
| FR2483953A1 (en) | PROCESS FOR PRODUCING AN ORIENTED GRAIN ELECTRO-MAGNETIC STEEL SHEET | |
| BE1004526A6 (en) | Heat treatment method of steel product. | |
| JPS6159377B2 (en) | ||
| JP3741363B2 (en) | Method for producing Ni-containing strip | |
| FR2488281A1 (en) | PROCESS FOR MANUFACTURING A STEEL BAND FOR IRON-WHITE AND NON-ETAMED SHEET AT VARIOUS DEGREES OF INCOME | |
| US4291558A (en) | Process of rolling iron-silicon strip material | |
| EP0540405B1 (en) | Process for manufacturing magnetic steel strip by direct casting | |
| RU2699490C1 (en) | Method of cutting pipe on strip workpiece | |
| EP0293286B1 (en) | Method and device for manufacturing articles for magnetic use | |
| FR2513548A1 (en) | HOT ROLLED METHOD OF STRIP AND HOT ROLLED FOR STRIPS | |
| RU2071990C1 (en) | Method of strip heat treatment | |
| BE901292A (en) | PROCESS OF CONTROLLED LAMINATION OF A THICK PRODUCT. | |
| EP0273838B1 (en) | Process to increase the recrystillization temperature of aluminium and its alloys | |
| EP3126539A1 (en) | Equipment and process for the pickling and metallic coating of a metal strip | |
| BE858549A (en) | PROCESS FOR PROCESSING CONTINUOUS CAST STEEL SLABS | |
| JPS60187426A (en) | Manufacture of seamless stainless steel pipe | |
| JPH11179401A (en) | Blooming standby rolling method | |
| BE555766A (en) | ||
| JPH03146646A (en) | Hot rolling method for phosphor bronze alloy |
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 GB GR IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19900522 |
|
| 17Q | First examination report despatched |
Effective date: 19911119 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19940126 Ref country code: NL Effective date: 19940126 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19940126 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19940126 Ref country code: AT Effective date: 19940126 |
|
| REF | Corresponds to: |
Ref document number: 100868 Country of ref document: AT Date of ref document: 19940215 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 68912651 Country of ref document: DE Date of ref document: 19940310 |
|
| ITF | It: translation for a ep patent filed | ||
| 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: 19940430 Ref country code: LI Effective date: 19940430 Ref country code: CH Effective date: 19940430 Ref country code: BE Effective date: 19940430 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940407 |
|
| NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
| BERE | Be: lapsed |
Owner name: ETS GRISET Effective date: 19940430 |
|
| 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 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20040330 Year of fee payment: 16 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20040625 Year of fee payment: 16 |
|
| 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: 20050426 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050426 |
|
| 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: 20051101 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20050426 |