EP0718411A1 - Process for producing steel strip for deep drawing and redrawing of steel cans - Google Patents

Process for producing steel strip for deep drawing and redrawing of steel cans Download PDF

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Publication number
EP0718411A1
EP0718411A1 EP95402752A EP95402752A EP0718411A1 EP 0718411 A1 EP0718411 A1 EP 0718411A1 EP 95402752 A EP95402752 A EP 95402752A EP 95402752 A EP95402752 A EP 95402752A EP 0718411 A1 EP0718411 A1 EP 0718411A1
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EP
European Patent Office
Prior art keywords
steel
carried out
strip
thickness
cold rolling
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EP95402752A
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German (de)
French (fr)
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EP0718411B1 (en
Inventor
Jacques Ouvrard
Michel Chauvire
Jean-Claude Jouvenel
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Sollac SA
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Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0436—Cold rolling

Definitions

  • the invention relates to a method of manufacturing a steel strip intended for the production by stamping and re-stamping of steel containers.
  • cold rolled strips of low carbon steel or ultra low carbon steel are used which are transformed by stamping / re-stamping.
  • the strips are obtained from hot rolled strips which are cold rolled a first time then annealed and then cold rolled a second time, the second cold rolling is carried out in a single pass which produces a reduction in thickness of approximately 40%.
  • the strips thus obtained have a thickness greater than or equal to 0.18 mm, a tensile strength less than 600 MPa, and a satisfactory drawing ability.
  • the object of the present invention is to provide a process for the manufacture of cold-rolled steel strips, having good drawing ability while having a tensile strength greater than 600 MPa and a thickness which may be less than 0 , 18 mm.
  • a thickness reduction of at least 35% is carried out.
  • the second cold rolling can have two passes, and in this case, during the first pass, a thickness reduction of at least 25% is carried out and during the second pass, a thickness reduction of at least 5%.
  • the thickness reduction carried out during the second cold rolling is between 38% and 47%, and the annealing is often carried out between 600 ° C and 700 ° C, the annealing can be carried out continuously.
  • the thickness of the strip may be less than 0.17 mm.
  • the inventors have found, quite unexpectedly, that when a cold rolled strip of steel of the ultra low carbon type is manufactured, obtained from hot rolled strips cold rolled a first time then annealed and then cold rolled a second times, and when the second cold rolling is carried out in two passes instead of a single pass, it was possible to obtain all at the same time, a small thickness, a high mechanical strength and a good drawing ability.
  • thin thickness means a thickness less than 0.20 mm, and preferably less than 0.17 mm; by high mechanical strength is meant a tensile strength greater than 600 MPa; by good drawing ability is meant a horn rate C of between 0 and -0.4, and an anisotropy coefficient r close to 2 (between 1.5 and 2.5).
  • a hot rolled strip is produced, in known manner, which is then cold rolled to obtain a cold rolled strip (blank), of thickness between 0.2 mm and 0.3 mm.
  • This blank is then annealed continuously between 600 ° C and 700 ° C and preferably between 630 ° C and 680 ° C.
  • the annealed blank is then subjected to a second cold rolling comprising at least two passes carried out on a continuous rolling mill.
  • the reduction rate of the first pass must be greater than 30% and the reduction rate of the second pass must be greater than 5%; the total reduction rate must be between 35% and 50%, and preferably between 40% and 45%.
  • Cold-rolled strips are thus obtained which are particularly suitable for the manufacture by stamping / re-stamping of steel containers of the beverage can type, the characteristics of which are indicated above.
  • Annealing was carried out at 650 ° C; during the second cold rolling, the reduction during the first pass was 30% and during the second pass the reduction was 10%.
  • the tensile strength of the strip was 675 MPa, the rate of horns measured by the magnetic anisotropy method was -0.36 and the rate of anisotropy r measured by the texture RX method was 2.01 .
  • Annealing was carried out at 650 ° C; during the second cold rolling, the reduction during the first pass was 30% and during the second pass the reduction was 8%.
  • the tensile strength of the strip was 635 MPa
  • the rate of horns measured by the magnetic anisotropy method was -0.25
  • the anisotropy rate r measured by the RX texture method was 2
  • Annealing was carried out at 650 ° C; during the second cold rolling, the reduction during the first pass was 20% and during the second pass the reduction was 10%.
  • the tensile strength of the strip was 626 MPa, the rate of horns measured by the magnetic anisotropy method was -0.42 and the rate of anisotropy r measured by the texture RX method was 1.5.
  • Annealing was carried out at 650 ° C; the second cold rolling was carried out in a single pass with a reduction rate of 45%.
  • the tensile strength of the strip was 599 MPa
  • the rate of horns measured by the magnetic anisotropy method was -0.34
  • the rate of anisotropy r measured by the texture RX method was 2.09 .
  • Annealing was carried out at 650 ° C; the second cold rolling, carried out in a single pass, the reduction rate was 30%.
  • the tensile strength of the strip was 599 MPa
  • the rate of horns measured by the magnetic anisotropy method was -0.46
  • the rate of anisotropy r measured by the RX texture method was 1.5
  • the examples according to the invention are a combination of tensile strength and rates of horns and anisotropy coefficients which clearly show the advantage of the invention compared to the examples of the prior art given by way of comparison.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Press Drives And Press Lines (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
  • Package Frames And Binding Bands (AREA)

Abstract

A steel strip from which drink cans are to be made, is prepared from a hot-rolled strip of very low carbon steel, which is first cold-rolled, then annealed at 600-700 degrees C, then cold-rolled again with at least two passes to reduce its thickness by at least 35%, pref. 38-47%. Pref. the process is continuous, and the two passes reduce the thickness by at least 25% and 5% respectively. The steel may comprise ≥ 0.006% C, ≥ 0.02% Si, 0.15-0.35% Mn, ≥ 0.015% S, ≥ 0.015% P, ≥ 0.006% N, 0.02-0.06% Al and the rest Fe apart from incidental impurities. The resulting strip has a thickness less than 0.2 mm, pref. less than 0.17 mm, and a bursting strength of at least 600 MPa.

Description

L'invention concerne un procédé de fabrication d'une bande d'acier destinée à la fabrication par emboutissage et ré-emboutissage de récipients en acierThe invention relates to a method of manufacturing a steel strip intended for the production by stamping and re-stamping of steel containers.

Pour la fabrication de boîtes en acier et notamment de boîtes destinées à contenir des boissons on utilise des bandes laminées à froid en acier à bas carbone ou à ultra bas carbone qui sont transformées par emboutissages/ré-emboutissage. Les bandes sont obtenues à partir de bandes laminées à chaud qui sont laminées à froid une première fois puis recuites puis laminées à froid une seconde fois, le second laminage à froid se fait en une seule passe qui produit une réduction d'épaisseur d'environ 40 %. Les bandes ainsi obtenues ont une épaisseur supérieure ou égale à 0,18 mm , une résistance à la traction inférieure à 600 MPa, et une aptitude à l'emboutissage satisfaisante.For the manufacture of steel cans and in particular cans intended to contain beverages cold rolled strips of low carbon steel or ultra low carbon steel are used which are transformed by stamping / re-stamping. The strips are obtained from hot rolled strips which are cold rolled a first time then annealed and then cold rolled a second time, the second cold rolling is carried out in a single pass which produces a reduction in thickness of approximately 40%. The strips thus obtained have a thickness greater than or equal to 0.18 mm, a tensile strength less than 600 MPa, and a satisfactory drawing ability.

Cependant, afin de réduire l'épaisseur des parois des récipients en acier fabriqués par emboutissage/ré-emboutissage, on essaye de fabriquer des bandes en acier laminées à froid dont l'épaisseur est inférieure à 0,18 mm et dont la résistance à la traction est supérieure à 600 MPa. Pour cela, soit on augmente le taux de réduction réalisé au cours du deuxième laminage à froid, soit on augmente la teneur en Carbone ou la teneur en Manganèse de l'acier. Mais ces deux techniques ont l'inconvénient de détériorer l'aptitude à l'emboutissage des bandes, si bien qu'elles ne sont pas satisfaisantes.However, in order to reduce the thickness of the walls of the steel containers produced by stamping / re-stamping, an attempt is made to manufacture cold-rolled steel strips whose thickness is less than 0.18 mm and whose resistance to traction is greater than 600 MPa. For this, either the reduction rate achieved during the second cold rolling is increased, or the carbon content or the manganese content of the steel is increased. However, these two techniques have the drawback of deteriorating the drawing ability of the strips, so that they are not satisfactory.

Le but de la présente invention est de proposer un procédé pour la fabrication de bandes en acier laminées à froid, ayant une bonne aptitude à l'emboutissage tout en ayant une résistance à la traction supérieure à 600 MPa et une épaisseur pouvant être inférieure à 0,18 mm.The object of the present invention is to provide a process for the manufacture of cold-rolled steel strips, having good drawing ability while having a tensile strength greater than 600 MPa and a thickness which may be less than 0 , 18 mm.

A cet effet l'invention à pour objet un procédé de fabrication d'une bande d'acier destinée à la fabrication par emboutissage et ré-emboutissage de récipients en acier selon lequel :

  • on approvisionne une bande en acier du type ultra-bas carbone, laminée à chaud,
  • on effectue un premier laminage à froid de la bande pour obtenir une ébauche,
  • on soumet l'ébauche à un recuit,
  • et on effectue un deuxième laminage à froid en au mois deux passes.
To this end, the subject of the invention is a method of manufacturing a steel strip intended for the manufacture by stamping and re-stamping of steel containers according to which:
  • we supply an ultra-low carbon steel strip, hot rolled,
  • a first cold rolling of the strip is carried out to obtain a blank,
  • the blank is subjected to annealing,
  • and a second cold rolling is carried out in at least two passes.

De préférence, au cours du deuxième laminage à froid, on effectue une réduction d'épaisseur d'au moins 35 %.Preferably, during the second cold rolling, a thickness reduction of at least 35% is carried out.

Le deuxième laminage à froid peut comporter deux passes, et dans ce cas, lors de la première passe on effectue une réduction d'épaisseur d'au moins 25 % et au cours de la deuxième passe, une réduction d'épaisseur d'au moins 5 %.The second cold rolling can have two passes, and in this case, during the first pass, a thickness reduction of at least 25% is carried out and during the second pass, a thickness reduction of at least 5%.

De préférence la réduction d'épaisseur réalisée au cours du deuxième laminage à froid est compris entre 38 % et 47 %, et le recuit est effectué souvent entre 600°C et 700°C, le recuit peut être effectué en continu.Preferably the thickness reduction carried out during the second cold rolling is between 38% and 47%, and the annealing is often carried out between 600 ° C and 700 ° C, the annealing can be carried out continuously.

Pour mettre en oeuvre le procédé il est préférable d'utiliser un acier du type ultra-bas carbone, dont la composition chimique, en poids, comprend :

  • C ≤ 0,006%
  • Si ≤ 0,02%
  • 0,15% ≤ Mn ≤ 0,35%
  • S ≤ 0,015%
  • P ≤ 0,015%
  • N ≤ 0,006%
  • 0,02% ≤ Al ≤ 0,06%
le reste étant du fer et des impuretés résultant de l'élaboration.To implement the process, it is preferable to use a steel of the ultra-low carbon type, the chemical composition of which, by weight, comprises:
  • C ≤ 0.006%
  • If ≤ 0.02%
  • 0.15% ≤ Mn ≤ 0.35%
  • S ≤ 0.015%
  • P ≤ 0.015%
  • N ≤ 0.006%
  • 0.02% ≤ Al ≤ 0.06%
the remainder being iron and impurities resulting from processing.

L'invention concerne également une bande en acier du type ultra-bas carbone pour la fabrication par emboutissage/ré-emboutissage de récipients en acier dont :

  • l'épaisseur est inférieure à 0,2 mm,
  • la résistance à la rupture est supérieure ou égale à 600 MPa,
  • le taux de cornes C est compris entre 0 et -0,4,
  • le coefficient d'anisotropie r est voisin de 2 (compris entre 1,5 et 2,5).
The invention also relates to a steel strip of the ultra-low carbon type for the manufacture by stamping / re-stamping of steel containers of which:
  • the thickness is less than 0.2 mm,
  • the breaking strength is greater than or equal to 600 MPa,
  • the rate of horns C is between 0 and -0.4,
  • the anisotropy coefficient r is close to 2 (between 1.5 and 2.5).

L'épaisseur de la bande peut être inférieure à 0,17 mm.The thickness of the strip may be less than 0.17 mm.

La bande peut être constituée d'un acier dont la composition chimique est telle que :

  • 0,03% ≤ C ≤ 0,06%
  • Si ≤ 0,03%
  • 0,15% ≤ Mn ≤ 0,35%
  • S ≤ 0,03%
  • P ≤ 0,02%
  • N ≤ 0,008%
  • 0,02% ≤ Al ≤ 0,06%
le reste étant du fer et des impuretés résultant de l'élaboration.The strip can be made of a steel whose chemical composition is such that:
  • 0.03% ≤ C ≤ 0.06%
  • If ≤ 0.03%
  • 0.15% ≤ Mn ≤ 0.35%
  • S ≤ 0.03%
  • P ≤ 0.02%
  • N ≤ 0.008%
  • 0.02% ≤ Al ≤ 0.06%
the remainder being iron and impurities resulting from processing.

Afin d'être mieux comprise, l'invention va maintenant être décrite plus en détail, mais de façon non limitative.In order to be better understood, the invention will now be described in more detail, but without limitation.

Les inventeurs ont constaté de façon tout à fait inattendue que, lorsque on fabrique une bandes laminée à froid en acier du type ultra bas carbone, obtenue à partir de bandes laminées à chaud laminées à froid une première fois puis recuites puis laminées à froid une seconde fois, et lorsque le second laminage à froid est effectué en deux passes au lieu d'une seule passe, il était possible d'obtenir tout à la fois, une épaisseur faible, une résistance mécanique élevée et une bonne aptitude à l'emboutissage.The inventors have found, quite unexpectedly, that when a cold rolled strip of steel of the ultra low carbon type is manufactured, obtained from hot rolled strips cold rolled a first time then annealed and then cold rolled a second times, and when the second cold rolling is carried out in two passes instead of a single pass, it was possible to obtain all at the same time, a small thickness, a high mechanical strength and a good drawing ability.

Par faible épaisseur on entend une épaisseur inférieure à 0,20 mm, et de préférence inférieure à 0,17 mm ; par résistance mécanique élevée on entend une résistance à la traction supérieure à 600 MPa ; par bonne aptitude à l'emboutissage, on entend, un taux de corne C compris entre 0 et -0,4 , et un coefficient d'anisotropie r voisin de 2 (compris entre 1,5 et 2,5).By thin thickness means a thickness less than 0.20 mm, and preferably less than 0.17 mm; by high mechanical strength is meant a tensile strength greater than 600 MPa; by good drawing ability is meant a horn rate C of between 0 and -0.4, and an anisotropy coefficient r close to 2 (between 1.5 and 2.5).

Pour fabriquer une telle bande , on utilise un acier à ultra bas carbone de composition chimique, en poids:

  • C ≤ 0,006%
  • Si ≤ 0,02%
  • 0,15% ≤ Mn ≤ 0,35%
  • S ≤ 0,015%
  • P ≤ 0,015%
  • N ≤ 0,006%
  • 0,02% ≤ Al ≤ 0,06%
le reste étant du fer et des impuretés résultant de l'élaboration.To manufacture such a strip, an ultra low carbon steel of chemical composition is used, by weight:
  • C ≤ 0.006%
  • If ≤ 0.02%
  • 0.15% ≤ Mn ≤ 0.35%
  • S ≤ 0.015%
  • P ≤ 0.015%
  • N ≤ 0.006%
  • 0.02% ≤ Al ≤ 0.06%
the remainder being iron and impurities resulting from processing.

Avec cet acier on fabrique, de façon connue, une bande laminée à chaud qui en suite est laminée à froid pour obtenir une bande laminée à froid, (ébauche), d'épaisseur comprise entre 0,2 mm et 0,3 mm. Cette ébauche est alors recuite en continu entre 600°C et 700°C et de préférence entre 630°C et 680°C. On fait alors subir à l'ébauche recuite un deuxième laminage à froid comportant au mois deux passes réalisées sur un laminoir continu. Le taux de réduction de la première passe doit être supérieure à 30 % et le taux de réduction de la deuxième passe doit être supérieur à 5 % ; le taux de réduction total doit être compris entre 35 % et 50 % , et de préférence entre 40 % et 45 %. On obtient ainsi des bandes laminées à froid particulièrement aptes à la fabrication par emboutissage/ré-emboutissage de récipients en acier du type boîtes pour boissons, dont les caractéristiques son indiquées ci dessus.With this steel, a hot rolled strip is produced, in known manner, which is then cold rolled to obtain a cold rolled strip (blank), of thickness between 0.2 mm and 0.3 mm. This blank is then annealed continuously between 600 ° C and 700 ° C and preferably between 630 ° C and 680 ° C. The annealed blank is then subjected to a second cold rolling comprising at least two passes carried out on a continuous rolling mill. The reduction rate of the first pass must be greater than 30% and the reduction rate of the second pass must be greater than 5%; the total reduction rate must be between 35% and 50%, and preferably between 40% and 45%. Cold-rolled strips are thus obtained which are particularly suitable for the manufacture by stamping / re-stamping of steel containers of the beverage can type, the characteristics of which are indicated above.

A titre de premier exemple, on à fabriqué une bande d'épaisseur 0,16 mm, avec un acier de composition chimique:

  • C = 0,002%
  • Si = 0,003%
  • Mn = 0,208%
  • S = 0,012%
  • P = 0,01%
  • N =0,005%
  • Al = 0,025%
le reste étant du fer et des impuretés résultant de l'élaboration.As a first example, a 0.16 mm thick strip was made with a steel of chemical composition:
  • C = 0.002%
  • If = 0.003%
  • Mn = 0.208%
  • S = 0.012%
  • P = 0.01%
  • N = 0.005%
  • Al = 0.025%
the remainder being iron and impurities resulting from processing.

Le recuit à été réalisé à 650°C ; lors du deuxième laminage à froid, la réduction au cours de la première passe était 30% et au cours de la deuxième passe la réduction était 10%.Annealing was carried out at 650 ° C; during the second cold rolling, the reduction during the first pass was 30% and during the second pass the reduction was 10%.

La résistance à la traction de la bande était de 675 MPa, le taux de cornes mesuré par la méthode d'anisotropie magnétique était de -0,36 et le taux d'anisotropie r mesuré par la méthode de texture RX était de 2,01.The tensile strength of the strip was 675 MPa, the rate of horns measured by the magnetic anisotropy method was -0.36 and the rate of anisotropy r measured by the texture RX method was 2.01 .

A titre de deuxième exemple, on a fabriqué une bande d'épaisseur 0,16 mm, avec un acier de composition chimique:

  • C = 0,002%
  • Si = 0,002%
  • Mn = 0,218%
  • S = 0,009%
  • P = 0,006%
  • N = 0,005%
  • Al = 0,027%
le reste étant du fer et des impuretés résultant de l'élaboration.As a second example, a strip 0.16 mm thick was made with a steel of chemical composition:
  • C = 0.002%
  • If = 0.002%
  • Mn = 0.218%
  • S = 0.009%
  • P = 0.006%
  • N = 0.005%
  • Al = 0.027%
the remainder being iron and impurities resulting from processing.

Le recuit à été réalisé à 650°C ; lors du deuxième laminage à froid, la réduction au cours de la première passe était 30% et au cours de la deuxième passe la réduction était 8%.Annealing was carried out at 650 ° C; during the second cold rolling, the reduction during the first pass was 30% and during the second pass the reduction was 8%.

La résistance à la traction de la bande était de 635 MPa, le taux de cornes mesuré par la méthode d'anisotropie magnétique était de -0,25 et le taux d'anisotropie r mesuré par la méthode de texture RX était de 2The tensile strength of the strip was 635 MPa, the rate of horns measured by the magnetic anisotropy method was -0.25 and the anisotropy rate r measured by the RX texture method was 2

A titre de troisième exemple, on a fabriqué une bande d'épaisseur 0,16 mm, avec un acier bas carbone de composition chimique:

  • C = 0,03%
  • Si = 0,009%
  • Mn = 0,197%
  • S = 0,012%
  • P = 0,0 1%
  • N = 0,006%
  • Al = 0,022%
le reste étant du fer et des impuretés résultant de l'élaboration.As a third example, a 0.16 mm thick strip was made with a low carbon steel of chemical composition:
  • C = 0.03%
  • If = 0.009%
  • Mn = 0.197%
  • S = 0.012%
  • P = 0.0 1%
  • N = 0.006%
  • Al = 0.022%
the remainder being iron and impurities resulting from processing.

Le recuit à été réalisé à 650°C ; lors du deuxième laminage à froid, la réduction au cours de la première passe était 20% et au cours de la deuxième passe la réduction était 10%.Annealing was carried out at 650 ° C; during the second cold rolling, the reduction during the first pass was 20% and during the second pass the reduction was 10%.

La résistance à la traction de la bande était de 626 MPa, le taux de cornes mesuré par la méthode d'anisotropie magnétique était de -0,42 et le taux d'anisotropie r mesuré par la méthode texture RX était de 1,5.The tensile strength of the strip was 626 MPa, the rate of horns measured by the magnetic anisotropy method was -0.42 and the rate of anisotropy r measured by the texture RX method was 1.5.

A titre de comparaison, on a fabriqué une bande d'épaisseur 0,16 mm, avec un acier de composition chimique:

  • C = 0,002%
  • Si = 0,003%
  • Mn = 0,208%
  • S = 0,012%
  • P = 0,01%
  • N = 0,005%
  • Al = 0,03%
le reste étant du fer et des impuretés résultant de l'élaboration.By way of comparison, a strip 0.16 mm thick was made, with a steel of chemical composition:
  • C = 0.002%
  • If = 0.003%
  • Mn = 0.208%
  • S = 0.012%
  • P = 0.01%
  • N = 0.005%
  • Al = 0.03%
the remainder being iron and impurities resulting from processing.

Le recuit à été réalisé à 650°C ; le deuxième laminage à froid, à été réalisé en une seule passe dont le taux de réduction était 45%.Annealing was carried out at 650 ° C; the second cold rolling was carried out in a single pass with a reduction rate of 45%.

La résistance à la traction de la bande était de 599 MPa, le taux de cornes mesuré par la méthode d'anisotropie magnétique était de -0,34 et le taux d'anisotropie r mesuré par la méthode de texture RX était de 2,09.The tensile strength of the strip was 599 MPa, the rate of horns measured by the magnetic anisotropy method was -0.34 and the rate of anisotropy r measured by the texture RX method was 2.09 .

Toujours à titre de comparaison, on à fabriqué une bande d'épaisseur 0,16 mm, avec un acier de composition chimique:

  • C = 0,035%
  • Si = 0,09%
  • Mn = 0,197
  • S = 0,12%
  • P = 0,01%
  • N = 0,006%
  • Al = 0,021 %
le reste étant du fer et des impuretés résultant de l'élaboration.Still by way of comparison, a 0.16 mm thick strip was made with a steel of chemical composition:
  • C = 0.035%
  • If = 0.09%
  • Mn = 0.197
  • S = 0.12%
  • P = 0.01%
  • N = 0.006%
  • Al = 0.021%
the remainder being iron and impurities resulting from processing.

Le recuit à été réalisé à 650°C ; le deuxième laminage à froid, à été réalisé en une seule passe dont le taux de réduction était 30%.Annealing was carried out at 650 ° C; the second cold rolling, carried out in a single pass, the reduction rate was 30%.

La résistance à la traction de la bande était de 599 MPa, le taux de cornes mesuré par la méthode d'anisotropie magnétique était de -0,46 et le taux d'anisotropie r mesuré par la méthode de texture RX était de 1,5The tensile strength of the strip was 599 MPa, the rate of horns measured by the magnetic anisotropy method was -0.46 and the rate of anisotropy r measured by the RX texture method was 1.5

Les exemples selon l'invention est combinent une résistance à la traction et des taux de cornes et des coefficients d'anisotropie qui montrent bien l'avantage de l'invention par rapport aux exemples de l'art antérieur donnés à titre de comparaison.The examples according to the invention are a combination of tensile strength and rates of horns and anisotropy coefficients which clearly show the advantage of the invention compared to the examples of the prior art given by way of comparison.

Claims (10)

Procédé de fabrication d'une bande d'acier destinée à la fabrication par emboutissage et ré-emboutissage de récipients en acier, selon lequel : - on approvisionne une bande en acier du type ultra-bas carbone, laminée à chaud, - on effectue un premier laminage à froid de la bande pour obtenir une ébauche, - on soumet l'ébauche à un recuit, - et on effectue un deuxième laminage à froid, caractérisé en ce que le deuxième laminage à froid est effectué en au mois deux passes. Method for manufacturing a steel strip intended for the manufacture by stamping and re-stamping of steel containers, according to which: - a hot-rolled steel strip of the ultra-low carbon type is supplied, - a first cold rolling of the strip is carried out to obtain a blank, - the blank is subjected to annealing, - And a second cold rolling is carried out, characterized in that the second cold rolling is carried out in at least two passes. procédé selon la revendication 1 caractérise en ce que, au cours du deuxième laminage à froid, on effectue une réduction d'épaisseur d'au moins 35 %.Process according to Claim 1, characterized in that, during the second cold rolling, a thickness reduction of at least 35% is carried out. Procédé selon la revendication 1 ou la revendication 2 caractérisé en ce que au cours du deuxième laminage à froid qui comporte deux passes, lors de la première passe on effectue une réduction d'épaisseur d'au moins 25 % et au cours de la deuxième passe, une réduction d'épaisseur d'au moins 5 %Method according to claim 1 or claim 2 characterized in that during the second cold rolling which comprises two passes, during the first pass a thickness reduction of at least 25% is carried out and during the second pass , a thickness reduction of at least 5% Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la réduction d'épaisseur réalisée au cours du deuxième laminage à froid est compris entre 38 % et 47 %.Process according to any one of Claims 1 to 3, characterized in that the reduction in thickness carried out during the second cold rolling is between 38% and 47%. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le recuit est effectué entre 600 °C et 700 °C.Process according to any one of Claims 1 to 4, characterized in that the annealing is carried out between 600 ° C and 700 ° C. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le recuit est effectué en continu.Process according to any one of Claims 1 to 5, characterized in that the annealing is carried out continuously. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'acier du type ultra-bas carbone comprend en sa composition chimique, en poids: C ≤ 0,006% Si ≤ 0,02% 0,15% ≤ Mn ≤ 0,35% S ≤ 0,015% P ≤ 0,015% N ≤ 0,006% 0,02% ≤ Al ≤ 0,06% le reste étant du fer et des impuretés résultant de l'élaboration.Process according to any one of Claims 1 to 6, characterized in that the steel of the ultra-low carbon type comprises in its chemical composition, by weight: C ≤ 0.006% If ≤ 0.02% 0.15% ≤ Mn ≤ 0.35% S ≤ 0.015% P ≤ 0.015% N ≤ 0.006% 0.02% ≤ Al ≤ 0.06% the remainder being iron and impurities resulting from processing. Bande en acier du type ultra-bas carbone pour la fabrication par emboutissage/ré-emboutissage de récipients en acier caractérisé en ce que : - son épaisseur est inférieure à 0,2 mm, - sa résistance à la rupture est supérieure ou égale à 600 MPa, - son taux de cornes C est compris entre 0 et -0,4, - son coefficient d'anisotropie r est voisin de 2 (compris entre 1,5 et 2,5). Steel strip of the ultra-low carbon type for the production by stamping / re-stamping of steel containers characterized in that: - its thickness is less than 0.2 mm, - its breaking strength is greater than or equal to 600 MPa, - its rate of horns C is between 0 and -0.4, - its anisotropy coefficient r is close to 2 (between 1.5 and 2.5). Bande selon la revendication 8 caractérisée en ce que son épaisseur est inférieure à 0,17 mm.Strip according to claim 8 characterized in that its thickness is less than 0.17 mm. Bande selon l'une quelconque des revendications 8 ou 9 caractérisée en ce qu'elle est constituée d'un acier dont la composition chimique est telle que : C ≤ 0,006% Si ≤ 0,02% 0,15% ≤ Mn ≤ 0,35% S ≤ 0,015% P ≤ 0,015% N ≤ 0,006% 0,02% ≤ Al ≤ 0,06% le reste étant du fer et des impuretés résultant de l'élaboration.Strip according to either of Claims 8 and 9, characterized in that it consists of a steel whose chemical composition is such that: C ≤ 0.006% If ≤ 0.02% 0.15% ≤ Mn ≤ 0.35% S ≤ 0.015% P ≤ 0.015% N ≤ 0.006% 0.02% ≤ Al ≤ 0.06% the remainder being iron and impurities resulting from processing.
EP95402752A 1994-12-21 1995-12-07 Process for producing steel strip for deep drawing and redrawing of steel cans Expired - Lifetime EP0718411B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9415350 1994-12-21
FR9415350A FR2728490B1 (en) 1994-12-21 1994-12-21 METHOD FOR MANUFACTURING A STEEL STRIP FOR THE MANUFACTURE BY STAMPING AND RE-STAMPING OF STEEL CONTAINERS

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EP0718411A1 true EP0718411A1 (en) 1996-06-26
EP0718411B1 EP0718411B1 (en) 2000-02-09

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US (1) US5704997A (en)
EP (1) EP0718411B1 (en)
JP (1) JPH08224602A (en)
AT (1) ATE189704T1 (en)
CA (1) CA2166565A1 (en)
DE (1) DE69515010T2 (en)
ES (1) ES2144591T3 (en)
FR (1) FR2728490B1 (en)
GR (1) GR3033166T3 (en)
PT (1) PT718411E (en)

Cited By (4)

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WO1998001242A1 (en) * 1996-07-08 1998-01-15 Mannesmann Ag Process for manufacture of precision steel tubes
EP0906961A1 (en) * 1997-10-03 1999-04-07 Sollac Process for manufacturing steel strip for making metal containers by deep drawing and steel strip obtained
EP0943696A1 (en) * 1997-09-04 1999-09-22 Kawasaki Steel Corporation Steel plates for drum cans, method of manufacturing the same, and drum can
CN1055316C (en) * 1998-02-25 2000-08-09 谢燕飞 Low carbon high-strength toughness steel band and manufacturing technology thereof

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
US6042952A (en) * 1996-03-15 2000-03-28 Kawasaki Steel Corporation Extremely-thin steel sheets and method of producing the same
JP4559918B2 (en) * 2004-06-18 2010-10-13 新日本製鐵株式会社 Steel plate for tin and tin free steel excellent in workability and method for producing the same
JP6044207B2 (en) * 2012-09-11 2016-12-14 Ｊｆｅスチール株式会社 Manufacturing method of thin steel sheet with excellent rigidity

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FR2115285A1 (en) * 1970-11-21 1972-07-07 Nippon Kokan Kk
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EP0574814A2 (en) * 1992-06-08 1993-12-22 Kawasaki Steel Corporation High-strength cold-rolled steel sheet excelling in deep drawability and method of producing the same
DE4319431C1 (en) * 1993-06-11 1994-11-03 Rasselstein Ag Process for producing a cold-rolled steel sheet as starting material for the production of shadow masks

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FR1438853A (en) * 1964-07-01 1966-05-13 Yawata Iron & Steel Co Process for producing thin extremely low carbon steel sheets
FR2115285A1 (en) * 1970-11-21 1972-07-07 Nippon Kokan Kk
EP0524162A2 (en) * 1991-07-17 1993-01-20 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Method of manufacturing a thin sheet of low carbon steel
EP0574814A2 (en) * 1992-06-08 1993-12-22 Kawasaki Steel Corporation High-strength cold-rolled steel sheet excelling in deep drawability and method of producing the same
DE4319431C1 (en) * 1993-06-11 1994-11-03 Rasselstein Ag Process for producing a cold-rolled steel sheet as starting material for the production of shadow masks

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001242A1 (en) * 1996-07-08 1998-01-15 Mannesmann Ag Process for manufacture of precision steel tubes
EP0943696A1 (en) * 1997-09-04 1999-09-22 Kawasaki Steel Corporation Steel plates for drum cans, method of manufacturing the same, and drum can
EP0943696A4 (en) * 1997-09-04 2000-04-19 Kawasaki Steel Co Steel plates for drum cans, method of manufacturing the same, and drum can
EP0906961A1 (en) * 1997-10-03 1999-04-07 Sollac Process for manufacturing steel strip for making metal containers by deep drawing and steel strip obtained
FR2769251A1 (en) * 1997-10-03 1999-04-09 Lorraine Laminage METHOD FOR MANUFACTURING A STEEL SHEET BAND FOR THE PRODUCTION OF METALLIC PACKAGING BY BONDING AND STEEL SHEET OBTAINED
CN1055316C (en) * 1998-02-25 2000-08-09 谢燕飞 Low carbon high-strength toughness steel band and manufacturing technology thereof

Also Published As

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DE69515010T2 (en) 2000-08-03
CA2166565A1 (en) 1996-06-22
JPH08224602A (en) 1996-09-03
FR2728490A1 (en) 1996-06-28
DE69515010D1 (en) 2000-03-16
GR3033166T3 (en) 2000-08-31
ATE189704T1 (en) 2000-02-15
EP0718411B1 (en) 2000-02-09
US5704997A (en) 1998-01-06
PT718411E (en) 2000-06-30
ES2144591T3 (en) 2000-06-16
FR2728490B1 (en) 1997-01-24

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