EP0094328B1 - Process for manufacturing aluminium alloy products with adequate drawing properties - Google Patents
Process for manufacturing aluminium alloy products with adequate drawing properties Download PDFInfo
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- EP0094328B1 EP0094328B1 EP83420075A EP83420075A EP0094328B1 EP 0094328 B1 EP0094328 B1 EP 0094328B1 EP 83420075 A EP83420075 A EP 83420075A EP 83420075 A EP83420075 A EP 83420075A EP 0094328 B1 EP0094328 B1 EP 0094328B1
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- Prior art keywords
- strip
- temperature
- aluminium alloy
- carried out
- galling
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- 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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Definitions
- the present invention relates to a process for manufacturing aluminum alloy products suitable for drawing and which applies more particularly to the strips obtained by casting between rolls.
- This strip turns out to be particularly advantageous for the production by deep drawing and drawing, of boxes intended in particular for packaging drinks. For this, it is brought to a thickness close to 300 ⁇ m by cold or hot rolling, in several passes which can be separated by intermediate annealing operations, then circular discs are cut from the sheet thus obtained and they are cut. submits to the combined action of a punch and a die, which causes by stamping the formation of a bucket whose walls surround the piston. This bucket then undergoes a dimensional transformation in a so-called stretching operation during which its walls are thinned.
- USP 4111 721 also notes this galling phenomenon on sheets of 3004 and 3003 and also admits that it is necessary to increase the particle size of AI-Mn and AI-Mn-Fe to remove it. However, to achieve this, it does not intervene at the level of the composition but teaches a heat treatment carried out preferably at a temperature of 620 ° C., for a time interval between 16 and 24 hours, treatment which can be carried out either on the raw casting strip, ie on the strip having already undergone a first series of rolling passes.
- the raw casting strip had to be heated in air at a temperature between 520 and 550 ° C for a few hours to find anti-galling properties.
- the Applicant has succeeded in solving the problems of galling and irregularity in coloring and gloss by operating from 'a classic 3004 and under the usual conditions of heat treatment.
- the invention therefore consists of a process for manufacturing sheets of aluminum alloy suitable for drawing, in which the alloy is cast between cylinders so as to form a strip which is heat treated, rolled to a thickness similar to 300 ktm during a series of passes which can be separated by annealing operations, so as to lead to a sheet in which discs are cut which are subjected to drawing and drawing, characterized in that the surface the strip is mechanically cleaned and then modified by air heat treatment, either between 520 and 550 ° C for 4 to 8 hours on the wound strip, or between 600 and 620 ° C for 1 to 10 minutes at the outlet of the casting machine.
- the new means implemented firstly include mechanical cleaning of the strip and, preferably, continuously. It can be carried out using any known device which essentially eliminates the particles deposited on the surface of the strip and the thick oxide layer formed during casting, while limiting the thickness of metal removed to a minimum.
- This cleaning can be carried out on parade, preferably by brushing using a brush with metallic or composite bristles (for example nylon plus tungsten carbide) driven by a rotational movement. Brushing can be done in the running direction of the strip, using a fixed cylindrical brush, the length of which is slightly greater than the width of the strip and the axis of which is perpendicular to this direction.
- the cleaning can also be carried out on the strip having already undergone a rolling pass when its thickness is close to 2.7 mm.
- Cleaning can be carried out on one or both sides depending on the destination of the product. In the case of boxing products, only the cleaning of the face which will form the outside of the box is necessary.
- an anti-galling layer is reformed on the surface of the strip by a heat treatment at high temperature in the air.
- This operation is carried out by heating the coil formed by the cleaned strip and wound at the outlet of the casting machine, in air, at a temperature between 520 and 550 ° C for 4 to 8 hours.
- a strip, heated to a lower temperature or for a shorter period, is just as sensitive to galling during stretching as a raw cleaning strip.
- the heating is carried out at a temperature above 560 ° C., the results are excellent from the galling point of view, but there is then formed on the strip a brown layer which results, at the level of the drawn and drawn products, by surface irregularities such as a more or less shiny and more or less brownish appearance, the unsightly effect of which results in the disposal of the box thus obtained.
- the modification of the surface of the strip by heat treatment can also be carried out continuously on passing, at the outlet of the casting machine after brushing. Under these conditions, the heating time being necessarily short and of the order of 1 to 10 minutes, unless there are very long passage ovens, the treatment temperature must be higher and between 600 and 620 ° C. to make a suitable modification of the surface.
- This treatment is preferably carried out in an electric oven, but it is also possible to use a flame oven or an oven with controlled atmosphere.
- the treatment is optimized as a function of the type of oven, its more or less humid atmosphere and the composition of the alloy treated, in particular as regards its magnesium and manganese content.
- alloy 3004 This process therefore does not only apply to alloy 3004 and the results of this invention have been verified and confirmed with alloys richer than the latter in magnesium, which contained, for example, 0.8% Mn and 2% Mg, or less rich in magnesium, for example, with an Mn content of 1.5% and an Mg content of 0.5%.
- this treatment in an oxidizing atmosphere can, for certain alloys, contribute to the homogenization effect sought to improve the mechanical characteristics.
- the strip covered with the deposit caused by the heating is then subjected to the rolling operations to bring it to the state of sheets with a thickness close to 300 wm.
Description
La présente invention est relative à un procédé de fabrication de produits en alliage d'aluminium aptes à l'étirage et qui s'applique plus particulièrement aux bandes obtenues par coulée entre cylindres.The present invention relates to a process for manufacturing aluminum alloy products suitable for drawing and which applies more particularly to the strips obtained by casting between rolls.
Il est connu de fabriquer en continu des bandes en aluminium ou en alliage d'aluminium, en introduisant ce métal à l'état fondu entre les deux cylindres tournant et refroidis d'une machine de coulée, de manière à provoquer la solidification du liquide sous forme d'une bande de largeur pouvant atteindre 2 mètres environ et d'épaisseur comprise entre 5 et 10 mm.It is known to continuously manufacture strips of aluminum or aluminum alloy, by introducing this metal in the molten state between the two rotating and cooled rolls of a casting machine, so as to cause the solidification of the liquid under form a strip of width up to approximately 2 meters and thickness between 5 and 10 mm.
Une telle technique a été décrite dans le brevet français 1 198 006.Such a technique has been described in French patent 1,198,006.
Cette bande s'avère particulièrement intéressante pour la réalisation par emboutissage profond et étirage, de boîtes destinées notamment au conditionnement des boissons. Pour cela, on l'amène à une épaisseur voisine de 300 µm par laminage à froid ou à chaud, en plusieurs passes qui peuvent être séparées par des opérations de recuit intermédiaire, puis on découpe des disques circulaires dans la feuille ainsi obtenue et on les soumet à l'action combinée d'un poinçon et d'une matrice, qui provoque par emboutissage la formation d'un godet dont les parois enveloppent le piston. Ce godet subit ensuite une transformation dimensionnelle dans une opération dite d'étirage au cours de laquelle ses parois sont amincies.This strip turns out to be particularly advantageous for the production by deep drawing and drawing, of boxes intended in particular for packaging drinks. For this, it is brought to a thickness close to 300 μm by cold or hot rolling, in several passes which can be separated by intermediate annealing operations, then circular discs are cut from the sheet thus obtained and they are cut. submits to the combined action of a punch and a die, which causes by stamping the formation of a bucket whose walls surround the piston. This bucket then undergoes a dimensional transformation in a so-called stretching operation during which its walls are thinned.
Cette mise en forme nécessite l'application d'efforts importants à la surface du métal et il en résulte assez souvent l'apparition d'un phénomène dit de « galling », c'est-à-dire de grippage entre le matériau embouti et l'outillage. Ce galling se traduit pour les alliages d'aluminium par un encrassement des outils, conduisant progressivement à l'apparition de rayures qui peuvent, dans certains cas, diminuer la résistance mécanique des boîtes, même parfois provoquer la rupture lors de l'opération d'étirage et, en tout cas, nuire à leur qualité esthétique.This shaping requires the application of significant forces to the surface of the metal and this quite often results in the appearance of a phenomenon known as "galling", that is to say seizure between the stamped material and the tools. This galling results for aluminum alloys in fouling of the tools, gradually leading to the appearance of scratches which can, in certain cases, reduce the mechanical resistance of the boxes, even sometimes causing breakage during the operation of stretching and, in any case, harm their aesthetic quality.
On a aussi constaté que la paroi d'une boîte pouvait présenter des irrégularités quant à la coloration ou à la brillance de sa surface.It was also noted that the wall of a box could have irregularities in the coloring or the gloss of its surface.
De nombreuses études ont été faites pour éviter ces défauts de surface et conférer aux boîtes un aspect satisfaisant à l'utilisateur. C'est ainsi, par exemple, qu'on a examiné de plus près, d'une part, le matériel utilisé et, plus précisément, l'influence de la nature des matériaux avec les- queles était confectionné l'outillage, de la forme du poinçon et de la matrice, de leurs dimensions et tolérances admissibles, de la vitesse d'emboutissage, des conditions de lubrification, d'autre part, le métal traité et, en particulier, sa composition, sa structure, ses caractéristiques mécaniques et son état de surface.Many studies have been done to avoid these surface defects and give the boxes a satisfactory appearance to the user. Thus, for example, we examined more closely, on the one hand, the material used and, more precisely, the influence of the nature of the materials with which the tools were made, the shape of the punch and of the die, their permissible dimensions and tolerances, the drawing speed, the lubrication conditions, on the other hand, the metal treated and, in particular, its composition, its structure, its mechanical characteristics and its surface condition.
C'est à la suite de ces études qu'ont été faites des inventions ayant donné lieu à la délivrance de brevets et qui ont chacune proposé une solution pour résoudre ce problème d'aspect de surface.It was as a result of these studies that inventions were made which gave rise to the grant of patents and which each proposed a solution to solve this problem of surface appearance.
On connaît notamment dans le domaine des feuilles d'aluminium résultant de la coulée entre cylindres et destinées à la fabrication de boîtes, les brevets suivants :
- l'USP 3930895 qui relate les problèmes de galling, lorsqu'on met en oeuvre un alliage du type 3004 suivant la norme de l'American Aluminium Association, c'est-à-dire ayant pour composition Si 0,3 %, Fe0,5 %, Cu 0,25 %, Mn 1 1.5%, Mg 0,8 à 1,3 %, Zn 0,25 %, solde AI. Ce brevet attribue les dificultés rencontrées au fait que la coulée continue entre cylindres conduit à la formation de particules d'AI-Mn de dimensions inférieures à 2 µm, qui sont trop petites pour avoir un effet de nettoyage sur l'outillage et contribue donc à son encrassement, et il cite le fait que, lorsqu'on traite un tel alliage obtenu par coulée classique, ces particules ont une dimension de 15 à 20 µm et il n'y a pas alors encrassement. Voulant néanmoins profiter des avantages de la coulée continue entre cylindres, notamment en ce qui concerne l'uniformité de la microstructure, l'inventeur préconise, pour augmenter la taille des ces particules, de modifier la composition de l'alliage 3004 en faisant passer la teneur en manganèse dans une fourchette comprise entre 2 et 3 %. Ainsi dans ce brevet, le phénomène du galling est-il lié à la microstructure du métal embouti.
- USP 3930895 which relates to galling problems, when an alloy of the type 3004 is used according to the standard of the American Aluminum Association, that is to say having the composition Si 0.3%, Fe0, 5%, Cu 0.25%, Mn 1 1.5%, Mg 0.8 to 1.3%, Zn 0.25%, balance AI. This patent attributes the dificulties encountered to the fact that continuous casting between cylinders leads to the formation of particles of AI-Mn of dimensions less than 2 μm, which are too small to have a cleaning effect on the tooling and therefore contributes to fouling, and he cites the fact that, when treating such an alloy obtained by conventional casting, these particles have a dimension of 15 to 20 μm and there is then no fouling. However, wanting to take advantage of the advantages of continuous casting between cylinders, in particular as regards the uniformity of the microstructure, the inventor recommends, to increase the size of these particles, to modify the composition of the alloy 3004 by passing the manganese content in a range between 2 and 3%. In this patent, the galling phenomenon is linked to the microstructure of the stamped metal.
L'USP 4111 721 constate aussi ce phénomène de galling sur des feuilles de 3004 et de 3003 et admet également qu'il faut accroître la dimension des particules d'AI-Mn et d'AI-Mn-Fe pour le supprimer. Toutefois pour y parvenir, il intervient non pas au niveau de la composition mais enseigne un traitement thermique effectué de préférence à une température de 620 °C, pendant un intervalle de temps compris entre 16 et 24 heures, traitement qui peut être effectué soit sur la bande brute de coulée, soit sur la bande ayant déjà subi une première série de passes de laminage.USP 4111 721 also notes this galling phenomenon on sheets of 3004 and 3003 and also admits that it is necessary to increase the particle size of AI-Mn and AI-Mn-Fe to remove it. However, to achieve this, it does not intervene at the level of the composition but teaches a heat treatment carried out preferably at a temperature of 620 ° C., for a time interval between 16 and 24 hours, treatment which can be carried out either on the raw casting strip, ie on the strip having already undergone a first series of rolling passes.
Si de tels procédés ont conduit à une réduction du phénomène de galling, ils n'ont pas apporté la disparition complète du phénomène et des irrégularités quant à la coloration et à la brillance de la surface des boîtes.If such methods have led to a reduction in the galling phenomenon, they have not brought about the complete disappearance of the phenomenon and irregularities as regards the coloration and the gloss of the surface of the cans.
Après maints essais, la demanderesse est arrivée à la conclusion que ces défauts étaient en relation avec l'état de surface de la bande brute de coulée. En effet, ayant procédé à un nettoyage mécanique de cette bande, elle a constaté que toutes les irrégularités de coloration et de brillance qui se manifestaient couramment avaient disparu. Malheureusement, le phénomène du galling s'était corrélativement amplifié de sorte que, si la boîte n'offrait certes plus de différences de coloration ou de brillance, par contre, sa qualité esthétique était maintenant perturbée par la présence de rayures.After many tests, the Applicant has come to the conclusion that these defects were related to the surface condition of the raw casting strip. Indeed, having carried out a mechanical cleaning of this strip, it found that all the irregularities in coloring and shine which were commonly manifested had disappeared. Unfortunately, the galling phenomenon had been correlatively amplified so that, if the box certainly no longer offered differences in color or gloss, on the other hand, its aesthetic quality was now disturbed by the presence of scratches.
Cherchant à approfondir le mécanisme de ce processus, elle a compris finalement que le phénomène de galling était ainsi lié à l'état de surface de la bande et qu'il était nécessaire d'avoir un dépôt sur l'aluminium pour éviter l'encrassement de l'outillage d'emboutissage, c'est-à-dire qu'en somme, il fallait reconstituer une partie de la couche de produit qui avait été enlevée lors du nettoyage mécanique mais, en guidant sa formation, de façon à éviter les irrégularités de coloration et de brillance. Après de nouveaux essais, elle a constaté que cette couche pouvait être formée en soumettant la bande à des conditions de milieu et de température bien précises.Seeking to deepen the mechanism of this process, she finally understood that the galling phenomenon was thus linked to the surface state. of the strip and that it was necessary to have a deposit on the aluminum to avoid fouling of the stamping tool, that is to say that in sum, it was necessary to reconstitute part of the layer of product which had been removed during mechanical cleaning but, by guiding its formation, so as to avoid irregularities in coloring and shine. After further testing, it found that this layer could be formed by subjecting the strip to very specific environmental and temperature conditions.
C'est ainsi qu'elle a trouvé que la bande brute de coulée devait être chauffée dans l'air à une température comprise entre 520 et 550 °C pendant quelques heures pour trouver des propriétés anti-galling.Thus she found that the raw casting strip had to be heated in air at a temperature between 520 and 550 ° C for a few hours to find anti-galling properties.
Ainsi, sans recourir soit à des traitements thermiques de longue durée à température élevée, soit à des alliages chargés en manganèse, la demanderesse est-elle parvenue à résoudre les problèmes de galling et d'irrégularité de coloration et de brillance en opérant à partir d'un 3004 classique et dans les conditions habituelles de traitement thermique.Thus, without having recourse either to long-term heat treatments at high temperature, or to alloys loaded with manganese, the Applicant has succeeded in solving the problems of galling and irregularity in coloring and gloss by operating from 'a classic 3004 and under the usual conditions of heat treatment.
L'invention consiste donc en un procédé de fabrication de feuilles en alliage d'aluminium aptes à l'étirage, dans lequel l'alliage est coulé entre cylindres de façon à former une bande qui est traitée thermiquement, laminée jusqu'à une épaisseur voisine de 300 ktm au cours d'une série de passes pouvant être séparées par des opérations de recuit, de manière à conduire à une feuille dans laquellé on découpe des disques qui sont soumis à un emboutissage et à un étirage, caractérisé en ce que la surface de la bande est nettoyée mécaniquement puis modifiée par traitement thermique à l'air, soit entre 520 et 550 °C pendant 4 à 8 heures sur la bande enroulée, soit entre 600 et 620 °C pendant 1 à 10 minutes à la sortie de la machine de coulée.The invention therefore consists of a process for manufacturing sheets of aluminum alloy suitable for drawing, in which the alloy is cast between cylinders so as to form a strip which is heat treated, rolled to a thickness similar to 300 ktm during a series of passes which can be separated by annealing operations, so as to lead to a sheet in which discs are cut which are subjected to drawing and drawing, characterized in that the surface the strip is mechanically cleaned and then modified by air heat treatment, either between 520 and 550 ° C for 4 to 8 hours on the wound strip, or between 600 and 620 ° C for 1 to 10 minutes at the outlet of the casting machine.
Ainsi, les moyens nouveaux mis en oeuvre comprennent d'abord un nettoyage mécanique de la bande et, de préférence, en continu. Il peut être réalisé au moyen de tout dispositif connu permettant d'éliminer essentiellement les particules déposées à la surface de la bande et la couche d'oxyde épaisse formée à la coulée, tout en limitant au minimum l'épaisseur de métal enlevé. Ce nettoyage peut être réalisé au défilé, de préférence par brossage au moyen d'une brosse à poils métalliques ou composites (par exemple nylon plus carbure de tungstène) animée d'un mouvement de rotation. Le brossage peut être fait dans la direction de défilement de la bande, au moyen d'une brosse cylindrique fixe, dont la longueur est un peu plus grande que la largeur de la bande et dont l'axe est perpendiculaire à cette direction. Mais, on peut aussi utiliser une brosse cylindrique de faible longueur avec un axe parallèle à la direction de défilement de la bande, soumise à un mouvement alternatif transversal de translation, de sorte qu'elle nettoie régulièrement toute la largeur de la bande avec un cetain recouvrement à chaque aller et retour. Les vitesses de rotation des brosses sont ajustées de façon à mettre à nu la surface de l'aluminium. Un tel brossage peut être effectué directement à la sortie de la machine de coulée, car la température du métal est déjà suffisamment basse (T... 400 °C) pour permettre le brossage sans collage du métal sur les poils de la brosse.Thus, the new means implemented firstly include mechanical cleaning of the strip and, preferably, continuously. It can be carried out using any known device which essentially eliminates the particles deposited on the surface of the strip and the thick oxide layer formed during casting, while limiting the thickness of metal removed to a minimum. This cleaning can be carried out on parade, preferably by brushing using a brush with metallic or composite bristles (for example nylon plus tungsten carbide) driven by a rotational movement. Brushing can be done in the running direction of the strip, using a fixed cylindrical brush, the length of which is slightly greater than the width of the strip and the axis of which is perpendicular to this direction. However, it is also possible to use a short cylindrical brush with an axis parallel to the direction of travel of the strip, subjected to an alternating transverse movement of translation, so that it regularly cleans the entire width of the strip with a bit recovery at each round trip. The rotational speeds of the brushes are adjusted so as to expose the surface of the aluminum. Such brushing can be carried out directly at the outlet of the casting machine, since the temperature of the metal is already low enough (T ... 400 ° C) to allow brushing without bonding of the metal to the bristles of the brush.
A la place du brossage, on peut aussi utiliser un jet de gaz sous pression émis par une source mobile, pour nettoyer la surface.Instead of brushing, one can also use a jet of pressurized gas emitted by a mobile source, to clean the surface.
Le nettoyage peut être effectué aussi sur la bande ayant déjà subi une passe de laminage alors que son épaisseur est voisine de 2,7 mm.The cleaning can also be carried out on the strip having already undergone a rolling pass when its thickness is close to 2.7 mm.
Le nettoyage peut être réalisé sur une seule ou sur les deux faces suivant la destination du produit. Dans le cas des produits pour boîtage, seul le nettoyage de la face qui formera l'extérieur de la boîte est nécessaire.Cleaning can be carried out on one or both sides depending on the destination of the product. In the case of boxing products, only the cleaning of the face which will form the outside of the box is necessary.
Après ce traitement, on reforme à la surface de la bande une couche « anti-galling par un traitement thermique à haute température dans l'air. Cette opération est effectuée en chauffant la bobine formée par la bande nettoyée et enroulée à la sortie de la machine de coulée, à l'air, à une température comprise entre 520 et 550 °C pendant 4 à 8 heures. Une bande, chauffée à une température inférieure ou pendant une durée plus courte, est tout aussi sensible au galling lors de l'étirage qu'une bande brute de nettoyage. Par contre, si le chauffage est effectué à une température supérieure à 560 °C, les résultats sont excellents du point de vue galling, mais il se forme alors sur la bande une couche brune qui se traduit, au niveau des produits emboutis et étirés, par des irrégularités de surface tel qu'un aspect plus ou moins brillant et plus ou moins brunâtre, dont l'effet inesthétique entraîne la mise au rebut de la boîte ainsi obtenue.After this treatment, an anti-galling layer is reformed on the surface of the strip by a heat treatment at high temperature in the air. This operation is carried out by heating the coil formed by the cleaned strip and wound at the outlet of the casting machine, in air, at a temperature between 520 and 550 ° C for 4 to 8 hours. A strip, heated to a lower temperature or for a shorter period, is just as sensitive to galling during stretching as a raw cleaning strip. On the other hand, if the heating is carried out at a temperature above 560 ° C., the results are excellent from the galling point of view, but there is then formed on the strip a brown layer which results, at the level of the drawn and drawn products, by surface irregularities such as a more or less shiny and more or less brownish appearance, the unsightly effect of which results in the disposal of the box thus obtained.
La modification de la surface de la bande par traitement thermique peut également être réalisée en continu au défilé, à la sortie de la machine de coulée après brossage. Dans ces conditions, la durée de chauffage étant nécessairement courte et de l'ordre de 1 à 10 minutes, à moins d'avoir des fours à passage très longs, la température de traitement doit être plus élevée et comprise entre 600 et 620 °C pour réaliser une modification convenable de la surface. Ce traitement est réalisé, de préférence, dans un four électrique, mais on peut également utiliser un four à flamme ou un four à atmosphère contrôlée.The modification of the surface of the strip by heat treatment can also be carried out continuously on passing, at the outlet of the casting machine after brushing. Under these conditions, the heating time being necessarily short and of the order of 1 to 10 minutes, unless there are very long passage ovens, the treatment temperature must be higher and between 600 and 620 ° C. to make a suitable modification of the surface. This treatment is preferably carried out in an electric oven, but it is also possible to use a flame oven or an oven with controlled atmosphere.
Le traitement est optimisé en fonction du type de four, de son atmosphère plus ou moins humide et de la composition de l'alliage traité, notamment en ce qui concerne sa teneur en magnésium et en manganèse.The treatment is optimized as a function of the type of oven, its more or less humid atmosphere and the composition of the alloy treated, in particular as regards its magnesium and manganese content.
L'expérience montre en effet que, plus la teneur en magnésium est élevée, plus le temps de traitement peut être court et réalisé à basse température.Experience has shown that the higher the magnesium content, the shorter the treatment time and can be carried out at low temperature.
Ce procédé ne s'applique donc pas uniquement à l'alliage 3004 et l'on a vérifié et confirmé les résultats de cette invention avec des alliages plus riches que ce dernier en magnésium, qui contenaient, par exemple, 0,8 % Mn et 2 % Mg, ou moins riches en magnésium, par exemple, avec une teneur en Mn de 1,5 % et en Mg de 0,5 %.This process therefore does not only apply to alloy 3004 and the results of this invention have been verified and confirmed with alloys richer than the latter in magnesium, which contained, for example, 0.8% Mn and 2% Mg, or less rich in magnesium, for example, with an Mn content of 1.5% and an Mg content of 0.5%.
Evidemment, ce traitement en atmosphère oxydante peut, pour certains alliages, contribuer à l'effet d'homogénéisation recherché pour améliorer les caractéristiques mécaniques.Obviously, this treatment in an oxidizing atmosphere can, for certain alloys, contribute to the homogenization effect sought to improve the mechanical characteristics.
La bande recouverte du dépôt provoqué par le chauffage est alors soumise aux opérations de laminage pour l'amener à l'état de feuilles d'épaisseur voisine de 300 wm.The strip covered with the deposit caused by the heating is then subjected to the rolling operations to bring it to the state of sheets with a thickness close to 300 wm.
Ces passes de laminage peuvent être accompagnées d'opérations de recuit intermédiaire et/ou final sans apporter de perturbations sensibles à l'état du dépôt.These rolling passes can be accompanied by intermediate and / or final annealing operations without bringing appreciable disturbances to the state of the deposit.
On dispose alors de feuilles présentant une très bonne aptitude à l'étirage se traduisant par des qualités esthétiques remarquables.We then have sheets with a very good stretchability resulting in remarkable aesthetic qualities.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8207924 | 1982-04-30 | ||
| FR8207924A FR2526047A1 (en) | 1982-04-30 | 1982-04-30 | PROCESS FOR THE PRODUCTION OF ALUMINUM ALLOY PRODUCTS FOR STRETCHING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0094328A1 EP0094328A1 (en) | 1983-11-16 |
| EP0094328B1 true EP0094328B1 (en) | 1985-10-09 |
Family
ID=9273809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83420075A Expired EP0094328B1 (en) | 1982-04-30 | 1983-04-29 | Process for manufacturing aluminium alloy products with adequate drawing properties |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US4441933A (en) |
| EP (1) | EP0094328B1 (en) |
| JP (1) | JPS58199854A (en) |
| AR (1) | AR231151A1 (en) |
| AU (1) | AU550513B2 (en) |
| BR (1) | BR8302222A (en) |
| CA (1) | CA1203068A (en) |
| DE (1) | DE3360967D1 (en) |
| ES (1) | ES8402620A1 (en) |
| FR (1) | FR2526047A1 (en) |
| GB (1) | GB2119294B (en) |
| GR (1) | GR71597B (en) |
| IN (1) | IN159293B (en) |
| MA (1) | MA19784A1 (en) |
| MY (1) | MY8600318A (en) |
| NO (1) | NO831516L (en) |
| PH (1) | PH18237A (en) |
| SU (1) | SU1306484A3 (en) |
| TR (1) | TR21513A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5681405A (en) | 1995-03-09 | 1997-10-28 | Golden Aluminum Company | Method for making an improved aluminum alloy sheet product |
| US6344096B1 (en) | 1995-05-11 | 2002-02-05 | Alcoa Inc. | Method of producing aluminum alloy sheet for automotive applications |
| US5714019A (en) * | 1995-06-26 | 1998-02-03 | Aluminum Company Of America | Method of making aluminum can body stock and end stock from roll cast stock |
| US5993573A (en) * | 1997-06-04 | 1999-11-30 | Golden Aluminum Company | Continuously annealed aluminum alloys and process for making same |
| US6579387B1 (en) | 1997-06-04 | 2003-06-17 | Nichols Aluminum - Golden, Inc. | Continuous casting process for producing aluminum alloys having low earing |
| US5976279A (en) | 1997-06-04 | 1999-11-02 | Golden Aluminum Company | For heat treatable aluminum alloys and treatment process for making same |
| US5985058A (en) * | 1997-06-04 | 1999-11-16 | Golden Aluminum Company | Heat treatment process for aluminum alloys |
| US20030173003A1 (en) * | 1997-07-11 | 2003-09-18 | Golden Aluminum Company | Continuous casting process for producing aluminum alloys having low earing |
| WO2003066927A1 (en) * | 2002-02-08 | 2003-08-14 | Nichols Aluminium | Method and apparatus for producing a solution heat treated sheet |
| AU2003215101A1 (en) * | 2002-02-08 | 2003-09-02 | Nichols Aluminum | Method of manufacturing aluminum alloy sheet |
| DE102013013407B4 (en) * | 2013-08-07 | 2015-05-28 | Salzgitter Flachstahl Gmbh | Method for producing steel cutting and cutting tools with improved tool life |
| KR20160047541A (en) * | 2013-09-06 | 2016-05-02 | 알코아 인코포레이티드 | Aluminum alloy products and methods for producing same |
| JP2019524989A (en) * | 2016-06-28 | 2019-09-05 | ノベリス・インコーポレイテッドＮｏｖｅｌｉｓ Ｉｎｃ． | Anodized quality aluminum alloys and related products and methods |
| CA3041580A1 (en) | 2016-10-27 | 2018-05-03 | Novelis Inc. | High strength 7xxx series aluminum alloys and methods of making the same |
| EP3532213B1 (en) | 2016-10-27 | 2021-09-01 | Novelis, Inc. | Apparatus and method for making thick gauge aluminum alloy articles |
| BR112019007379B1 (en) | 2016-10-27 | 2022-11-08 | Novelis Inc | METHOD FOR PRODUCING AN ALUMINUM ALLOY PRODUCT, AND, ALUMINUM ALLOY PRODUCT |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1198006A (en) * | 1958-01-31 | 1959-12-04 | Pechiney Prod Chimiques Sa | Continuous metal casting |
| US3486947A (en) * | 1967-06-21 | 1969-12-30 | Olin Mathieson | Enhanced structural uniformity of aluminum based alloys by thermal treatments |
| CH493642A (en) * | 1967-12-29 | 1970-07-15 | Alusuisse | Process for the production of fine-grained strips from aluminum alloys containing manganese |
| US3787248A (en) * | 1972-09-25 | 1974-01-22 | H Cheskis | Process for preparing aluminum alloys |
| US4039356A (en) * | 1973-05-14 | 1977-08-02 | Schumacher William J | Galling resistant austenitic stainless steel |
| US4111721A (en) * | 1976-06-14 | 1978-09-05 | American Can Company | Strip cast aluminum heat treatment |
| DE2810188A1 (en) * | 1978-03-09 | 1979-09-13 | Metallgesellschaft Ag | Heat treating continuously cast and rolled aluminium alloy strip - consists of annealing to obtain good combination of strength and deep drawing properties |
| US4163665A (en) * | 1978-06-19 | 1979-08-07 | Alumax Mill Products, Inc. | Aluminum alloy containing manganese and copper and products made therefrom |
| US4269632A (en) * | 1978-08-04 | 1981-05-26 | Coors Container Company | Fabrication of aluminum alloy sheet from scrap aluminum for container components |
| DE2929724C2 (en) * | 1978-08-04 | 1985-12-05 | Coors Container Co., Golden, Col. | Method of making an aluminum alloy ribbon for cans and lids |
| US4235646A (en) * | 1978-08-04 | 1980-11-25 | Swiss Aluminium Ltd. | Continuous strip casting of aluminum alloy from scrap aluminum for container components |
| US4238248A (en) * | 1978-08-04 | 1980-12-09 | Swiss Aluminium Ltd. | Process for preparing low earing aluminum alloy strip on strip casting machine |
| US4334935A (en) * | 1980-04-28 | 1982-06-15 | Alcan Research And Development Limited | Production of aluminum alloy sheet |
| US4318755A (en) * | 1980-12-01 | 1982-03-09 | Alcan Research And Development Limited | Aluminum alloy can stock and method of making same |
-
1982
- 1982-04-30 FR FR8207924A patent/FR2526047A1/en active Granted
-
1983
- 1983-02-25 US US06/469,757 patent/US4441933A/en not_active Expired - Lifetime
- 1983-03-11 PH PH28634A patent/PH18237A/en unknown
- 1983-04-25 CA CA000426641A patent/CA1203068A/en not_active Expired
- 1983-04-25 JP JP58072762A patent/JPS58199854A/en active Granted
- 1983-04-25 AR AR292805A patent/AR231151A1/en active
- 1983-04-25 GR GR71195A patent/GR71597B/el unknown
- 1983-04-26 GB GB08311283A patent/GB2119294B/en not_active Expired
- 1983-04-26 IN IN500/CAL/83A patent/IN159293B/en unknown
- 1983-04-27 SU SU833586955A patent/SU1306484A3/en active
- 1983-04-27 TR TR21513A patent/TR21513A/en unknown
- 1983-04-28 MA MA20004A patent/MA19784A1/en unknown
- 1983-04-28 AU AU14033/83A patent/AU550513B2/en not_active Ceased
- 1983-04-29 BR BR8302222A patent/BR8302222A/en unknown
- 1983-04-29 EP EP83420075A patent/EP0094328B1/en not_active Expired
- 1983-04-29 NO NO831516A patent/NO831516L/en unknown
- 1983-04-29 ES ES521949A patent/ES8402620A1/en not_active Expired
- 1983-04-29 DE DE8383420075T patent/DE3360967D1/en not_active Expired
-
1986
- 1986-12-30 MY MY318/86A patent/MY8600318A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2526047B1 (en) | 1984-10-05 |
| PH18237A (en) | 1985-05-03 |
| AU550513B2 (en) | 1986-03-20 |
| CA1203068A (en) | 1986-04-15 |
| GB2119294A (en) | 1983-11-16 |
| FR2526047A1 (en) | 1983-11-04 |
| IN159293B (en) | 1987-04-25 |
| AR231151A1 (en) | 1984-09-28 |
| DE3360967D1 (en) | 1985-11-14 |
| JPS6242025B2 (en) | 1987-09-05 |
| GB2119294B (en) | 1985-09-25 |
| GB8311283D0 (en) | 1983-06-02 |
| MY8600318A (en) | 1986-12-31 |
| AU1403383A (en) | 1983-11-03 |
| JPS58199854A (en) | 1983-11-21 |
| SU1306484A3 (en) | 1987-04-23 |
| ES521949A0 (en) | 1984-02-01 |
| MA19784A1 (en) | 1983-12-31 |
| BR8302222A (en) | 1984-01-03 |
| NO831516L (en) | 1983-10-31 |
| TR21513A (en) | 1984-07-01 |
| ES8402620A1 (en) | 1984-02-01 |
| GR71597B (en) | 1983-06-17 |
| EP0094328A1 (en) | 1983-11-16 |
| US4441933A (en) | 1984-04-10 |
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