EP0718411B1 - Procédé de fabrication d'une bande d'acier destinée à la fabrication par emboutissage et ré-emboutissage de récipients en acier - Google Patents
Procédé de fabrication d'une bande d'acier destinée à la fabrication par emboutissage et ré-emboutissage de récipients en acier Download PDFInfo
- Publication number
- EP0718411B1 EP0718411B1 EP95402752A EP95402752A EP0718411B1 EP 0718411 B1 EP0718411 B1 EP 0718411B1 EP 95402752 A EP95402752 A EP 95402752A EP 95402752 A EP95402752 A EP 95402752A EP 0718411 B1 EP0718411 B1 EP 0718411B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel
- strip
- thickness
- cold rolling
- process according
- 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
Classifications
-
- 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 strip. steel intended for the production by stamping and re-stamping of steel containers.
- cold-rolled strips are used made of low carbon or ultra low carbon steel which are transformed by stamping / re-stamping.
- the bands are obtained from hot rolled strips which are cold rolled a first time then annealed and then cold rolled a second time, the second rolling to cold is done in a single pass which produces a reduction in thickness about 40%.
- the strips thus obtained have a greater thickness or equal to 0.18 mm, a tensile strength less than 600 MPa, and a satisfactory drawing ability.
- Such a method is disclosed EP524162A2.
- the aim of the present invention is to propose a method for the production of cold rolled steel strips with good ability to stamp by conferring an anisotropy coefficient r between 1.5 and 2.5 while having a tensile strength greater than 600 MPa and a thickness less than 0.18 mm.
- the second cold rolling performs a thickness reduction of at least 35%.
- the second cold rolling can have two passes, and in this case, during the first pass, we perform a reduction at least 25% thick and during the second pass, a thickness reduction of at least 5%.
- the thickness reduction achieved during the second cold rolling is between 38% and 47%, and annealing is often carried out between 600 ° C and 700 ° C, 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 we manufacture a cold rolled steel strip of the ultra type low carbon, obtained from hot rolled strips rolled to cold a first time then annealed then cold rolled a second times, and when the second cold rolling is carried out in two passes at instead of a single pass, it was possible to obtain all at once, a low thickness, high mechanical strength and good suitability stamping.
- thin thickness means a thickness less than 0.20 mm, and preferably less than 0.17 mm; by resistance high mechanical strength means a tensile strength greater than 600 MPa; by good drawing ability is meant a rate of horn C between 0 and -0.4, and a neighboring anisotropy coefficient r of 2 (between 1.5 and 2.5).
- a strip is produced in known manner. hot rolled which is then cold rolled to obtain a strip cold rolled, (blank), thickness between 0.2 mm and 0.3 mm.
- This blank is then continuously annealed between 600 ° C and 700 ° C and preferably between 630 ° C and 680 ° C.
- 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 manufacture by stamping / re-stamping of steel containers of the type drinks boxes, the characteristics of which are indicated below above.
- Annealing was carried out at 650 ° C; during the second rolling at cold, 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 horn rate measured by the magnetic anisotropy method was -0.36 and the anisotropy rate r measured by the RX texture method was 2.01.
- Annealing was carried out at 650 ° C; during the second rolling at cold, 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 horn rate measured by the magnetic anisotropy method was -0.25
- the anisotropy rate r measured by the RX texture method was of 2
- Annealing was carried out at 650 ° C; during the second rolling at cold, 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 horn rate measured by the magnetic anisotropy method was -0.42 and the anisotropy rate r measured by the texture RX method was 1.5.
- Annealing was carried out at 650 ° C; the second rolling at cold, was carried out in a single pass, the reduction rate of which was 45%.
- the tensile strength of the strip was 599 MPa
- the horn rate measured by the magnetic anisotropy method was -0.34
- the anisotropy rate r measured by the RX texture method was 2.09.
- Annealing was carried out at 650 ° C; the second rolling at cold, was carried out in a single pass, the reduction rate of which was 30%.
- the tensile strength of the strip was 599 MPa
- the horn rate measured by the magnetic anisotropy method was -0.46
- the anisotropy rate r measured by the RX texture method was 1.5.
- the examples according to the invention is combine resistance tensile and horn rates and anisotropy coefficients which clearly show the advantage of the invention compared to the examples of the art previous given for comparison.
Landscapes
- 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)
- Heat Treatment Of Steel (AREA)
- Press Drives And Press Lines (AREA)
- Package Frames And Binding Bands (AREA)
- Metal Rolling (AREA)
Description
- 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.
- l'épaisseur est inférieure à 0.18 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 compris entre 1,5 et 2,5, de préférence voisin de 2.
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,
- 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 %.
- 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 %
- 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 %.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le recuit est effectué entre 600 °C et 700 °C.
- Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le recuit est effectué en continu.
- 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%
- 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 0.18 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 compris entre 1,5 et 2,5.
- Bande selon la revendication 8 caractérisée en ce que son épaisseur est inférieure à 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%
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9415350A FR2728490B1 (fr) | 1994-12-21 | 1994-12-21 | Procede de fabrication d'une bande d'acier destinee a la fabrication par emboutissage et re-emboutissage de recipients en acier |
FR9415350 | 1994-12-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0718411A1 EP0718411A1 (fr) | 1996-06-26 |
EP0718411B1 true EP0718411B1 (fr) | 2000-02-09 |
Family
ID=9470010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95402752A Expired - Lifetime EP0718411B1 (fr) | 1994-12-21 | 1995-12-07 | Procédé de fabrication d'une bande d'acier destinée à la fabrication par emboutissage et ré-emboutissage de récipients en acier |
Country Status (10)
Country | Link |
---|---|
US (1) | US5704997A (fr) |
EP (1) | EP0718411B1 (fr) |
JP (1) | JPH08224602A (fr) |
AT (1) | ATE189704T1 (fr) |
CA (1) | CA2166565A1 (fr) |
DE (1) | DE69515010T2 (fr) |
ES (1) | ES2144591T3 (fr) |
FR (1) | FR2728490B1 (fr) |
GR (1) | GR3033166T3 (fr) |
PT (1) | PT718411E (fr) |
Families Citing this family (7)
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 |
DE19628714C1 (de) * | 1996-07-08 | 1997-12-04 | Mannesmann Ag | Verfahren zur Herstellung von Präzisionsstahlrohren |
WO1999011835A1 (fr) * | 1997-09-04 | 1999-03-11 | Kawasaki Steel Corporation | Plaques d'acier pour futs, procede de fabrication et fut |
FR2769251B1 (fr) * | 1997-10-03 | 1999-12-24 | Lorraine Laminage | Procede de fabrication d'une bande de tole d'acier pour la realisation d'emballages metalliques par emboutissage et tole d'acier obtenue |
CN1055316C (zh) * | 1998-02-25 | 2000-08-09 | 谢燕飞 | 一种低碳高强韧性钢带及其制造工艺 |
JP4559918B2 (ja) * | 2004-06-18 | 2010-10-13 | 新日本製鐵株式会社 | 加工性に優れたブリキおよびテインフリースチール用鋼板およびその製造方法 |
JP6044207B2 (ja) * | 2012-09-11 | 2016-12-14 | Jfeスチール株式会社 | 剛性に優れた薄鋼板の製造方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0581629A1 (fr) * | 1992-07-23 | 1994-02-02 | Sollac | Tôle pour emboutissage en rétreint et procédé pour la fabrication d'une telle tôle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1438853A (fr) * | 1964-07-01 | 1966-05-13 | Yawata Iron & Steel Co | Procédé pour produire des tôles d'acier fines à extrêment bas carbone |
FR2115285B1 (fr) * | 1970-11-21 | 1974-05-31 | Nippon Kokan Kk | |
EP0524162B1 (fr) * | 1991-07-17 | 1998-11-11 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Procédé de fabrication d'une bande mince en acier doux |
CA2097900C (fr) * | 1992-06-08 | 1997-09-16 | Saiji Matsuoka | Tole d'acier laminee a froid a haute resistance pour emboutissage profond et procede de fabrication |
DE4319431C1 (de) * | 1993-06-11 | 1994-11-03 | Rasselstein Ag | Verfahren zur Herstellung eines kaltgewalzten Stahlbleches als Ausgangsmaterial für die Herstellung von Schattenmasken |
-
1994
- 1994-12-21 FR FR9415350A patent/FR2728490B1/fr not_active Expired - Fee Related
-
1995
- 1995-12-07 PT PT95402752T patent/PT718411E/pt unknown
- 1995-12-07 EP EP95402752A patent/EP0718411B1/fr not_active Expired - Lifetime
- 1995-12-07 ES ES95402752T patent/ES2144591T3/es not_active Expired - Lifetime
- 1995-12-07 DE DE69515010T patent/DE69515010T2/de not_active Expired - Fee Related
- 1995-12-07 AT AT95402752T patent/ATE189704T1/de not_active IP Right Cessation
- 1995-12-19 CA CA002166565A patent/CA2166565A1/fr not_active Abandoned
- 1995-12-19 JP JP7348755A patent/JPH08224602A/ja not_active Abandoned
- 1995-12-21 US US08/576,368 patent/US5704997A/en not_active Expired - Fee Related
-
2000
- 2000-04-06 GR GR20000400858T patent/GR3033166T3/el not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0581629A1 (fr) * | 1992-07-23 | 1994-02-02 | Sollac | Tôle pour emboutissage en rétreint et procédé pour la fabrication d'une telle tôle |
Also Published As
Publication number | Publication date |
---|---|
DE69515010D1 (de) | 2000-03-16 |
GR3033166T3 (en) | 2000-08-31 |
DE69515010T2 (de) | 2000-08-03 |
ES2144591T3 (es) | 2000-06-16 |
ATE189704T1 (de) | 2000-02-15 |
CA2166565A1 (fr) | 1996-06-22 |
JPH08224602A (ja) | 1996-09-03 |
FR2728490A1 (fr) | 1996-06-28 |
PT718411E (pt) | 2000-06-30 |
EP0718411A1 (fr) | 1996-06-26 |
FR2728490B1 (fr) | 1997-01-24 |
US5704997A (en) | 1998-01-06 |
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