EP0906961B1 - Procédé de fabrication d'une bande de tôle d'acier pour la réalisation d'emballages métalliques par emboutissage et tôle d'acier obtenue - Google Patents
Procédé de fabrication d'une bande de tôle d'acier pour la réalisation d'emballages métalliques par emboutissage et tôle d'acier obtenue Download PDFInfo
- Publication number
- EP0906961B1 EP0906961B1 EP98402383A EP98402383A EP0906961B1 EP 0906961 B1 EP0906961 B1 EP 0906961B1 EP 98402383 A EP98402383 A EP 98402383A EP 98402383 A EP98402383 A EP 98402383A EP 0906961 B1 EP0906961 B1 EP 0906961B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold rolling
- strip
- steel
- done
- rolling
- 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
- C21D8/0447—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 heat treatment
- C21D8/0468—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 heat treatment between cold rolling steps
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Definitions
- the invention relates to a method of manufacturing a sheet metal strip. steel for the production of metal packaging and the sheet obtained by the process.
- Sheets with strong characteristics may need to be obtained mechanical, in particular mechanical strength and high yield strength for making metal bodies or bodies with very good resistance, even in the case of very thin sheets for the production of certain packaging.
- the level of mechanical characteristics of the sheet which is obtained after the second cold rolling is a function of the reduction rate or the elongation of the sheet obtained during the two passes of the second rolling.
- the double reduction process which implements a second cold rolling in two passes after annealing the sheets, was applied to steel grades for both ultra low carbon (ULC) packaging the carbon content of which is less than 0.008% than that of steels of other types, for example to renitrided low aluminum steels containing from 8 to 16 thousandths percent of nitrogen.
- ULC ultra low carbon
- the object of the invention is to propose a manufacturing process a strip of sheet steel for the production of metal packaging allowing to obtain mechanical characteristics at least as high than in the case of double reduction manufacturing processes, with a lower work hardening of the sheet and therefore better formability too both in the case of ULC steel and in the case of low aluminum steel renitrence.
- the method of the invention comprising aging in conditions defined between the two passes of the second rolling which are carried out with controlled elongation rates, is made according to claim 1 in in the case of ULC steels and according to claim 4, in the case of low steels renitrided aluminum.
- Example 1 case of an ultra low carbon steel ULC.
- the blank was subjected to a second cold rolling in a skin-pass rolling mill.
- Sheet metal ref Allongt 1 passes era TT Re (MPa) Allongt 2nd pass Total elongation Re (Mpa) SP output Re (MPa) after 200 ° C / 20mn AT 43% 562 606 B 31% 527 9% 43% 558 610 VS 31% 20 ° C / 10J 568 9% 43% 594 648 E 31% 75 ° C / 3h 552 9% 43% 616 665 F 31% 200 ° C / 20 minutes 565 9% 43% 616 668 G 31% 20 ° C / 3j 560 9% 43% 589 621
- the sheets designated by the references A and B have not been subjected to a treatment according to the invention.
- the sheets A and B obtained at the end from the second cold rolling to the skin-pass are designated as sheets comparative.
- the sheets designated under the references C, E, F and G were subjected, according to the method of the invention, to a second cold rolling in two passes with aging between the two skin-pass rolling passes.
- the total elongation of the sheet is 43%, this elongation being obtained in a single pass in the case of sheet A.
- the elongation is obtained in two passes (respectively 31% and 9% elongation), without intermediate aging treatment between two passes, in the case of sheet B.
- Sheet C is subjected to aging for 10 days at 20 ° C between the two cold rolling passes.
- An aging treatment at 200 ° C for 20 minutes is carried out between the two passes from the final cold rolling to the skin-pass (extensions of 31 and 9%) in the case of sheet F and sheet G is subject three days aging at 20 ° C between the two rolling passes final.
- the elastic limit of the sheets was measured in MPa, at the end of the treatment thermal after the first pass from cold rolling to the skin-pass, when two rolling passes are made (sheets B to G); limits corresponding elastics are reported in the fourth column of the table I.
- the elastic limits of the sheets were also measured immediately after leaving the skin-pass (7 th column of table I) and after holding the sheet for 20 minutes at 200 ° C. after leaving the skin-pass (8 th column of the table I).
- Sheet B which is made with a second rolling in two passes therefore has mechanical characteristics, after 20 minutes at 200 ° C, slightly higher than sheet A produced by a second rolling in one pass.
- an additional improvement is brought about by an aging treatment between the two rolling passes of the rolling final.
- the limit elastic between the two rolling passes is considerably increased by a treatment of aging, as it appears by comparing the limits elastic of sheets C to G at the elastic limit of sheet B.
- the elastic limits, immediately after leaving the skin-pass or after 20 minutes at 200 ° C, are further increased due to the hardening brought about by the second pass of rolling.
- the final elastic limits obtained on sheets C to G of which the production is carried out according to the invention are significantly higher than the final elastic limits of sheets A and B obtained by a process of second rolling in one pass (sheet A) or second rolling in two passes (sheet B) according to the prior art, the total elongation rate being identical in all cases.
- the process according to the invention therefore makes it possible to obtain, for a total hardening of identical sheet, mechanical characteristics higher. Because the ability to form sheet metal and in particular the ability at the stamping depend on the hardening, one can obtain sheets having at the same time satisfactory forming characteristics and high mechanical characteristics.
- ultra low carbon steel can age at an ambient temperature of around 20 ° C for a period of 3 to 10 days, at a moderate temperature between 50 ° C and 100 ° C for a period of 1 to 5 hours, or at a temperature higher, between 150 ° C and 300 ° C, for a period between 10 minutes and 1 hour.
- Sheet metal ref Allongt 1 passes era TT Re (MPa) Long 2nd pass Total elongation Re (MPa) SP output AT' 28% 570 B ' 20% 20 ° C / 3j 601 6% 28% 595 VS' 20% 75 ° C / 10h 600 6% 28% 635 OF 20% 200 ° C / 20 minutes 630 6% 28% 625
- the sheet 1 ' is produced by an elaboration process according to art while the sheets B ', C' and D 'are produced by a process according to the invention.
- the second cold rolling is carried out in a single pass with an elongation rate of 28%.
- the elastic limit of the sheet at the exit of the skin-pass is 570 MPa.
- the sheets B ', C' and D ' were produced by a process according to the invention in which the second cold rolling is carried out in two passes (20% and 6% elongation respectively) with a heat treatment of aging between the two passes.
- the manufacturing processes for sheets B ', C' and D ' are distinguished by the conditions under which the heat treatment between the two passes of the final rolling.
- Sheet B ' was aged at an ambient temperature of 20 ° C for three days.
- Sheet C ' has been aged at a moderate temperature of 75 ° C for 10 hours and the sheet metal D has been aged at a temperature higher than 200 ° C for 20 minutes.
- the elastic limits obtained at the exit of the skin-pass after the second rolling pass producing 6% elongation are all greater than the elastic limit of the sheet A 'obtained by rolling with skin pass in one pass.
- sheet B ' Although long-term aging at room temperature is satisfactory (sheet B '), it is preferable to carry out the aging at a higher temperature, for a shorter time.
- a new dislocation network or second dislocation network During the second skin pass pass, a new dislocation network or second dislocation network.
- This new configuration of the dislocation network explains obtaining a better formability for characteristics mechanical properties or obtaining mechanical characteristics maintaining good formability.
- the invention applies to all steels for Al-K sheets, that is to say steels calmed with aluminum, without carburogenic and / or ni scholarogenic elements, when these sheet steels are continuously annealed.
- the aging treatment can be carried out at a temperature close to 20 ° C, for a period of 3 to 10 days, or at a moderate temperature between 50 and 100 ° C for a period of 5 to 15 hours, or even at a higher temperature between 150 and 300 ° C for a period of between 10 minutes and an hour.
- the invention also applies to ultra low carbon steels whose general composition is given above.
- the sheets obtained by the process of the invention can be used in all DR sheet packaging applications.
- the sheets can be cut to produce blanks intended to the manufacture of bodies or bottoms of boxes two or three pieces with strong mechanical characteristics.
- the sheets obtained by the process of the invention can be used in thicknesses weaker.
- the total elongation rate during the second cold rolling may be different from the elongation rates shown above.
- the distribution of the elongation percentages between the first and the second pass of the second cold rolling may be different from the indicated distributions upper.
- the second cold rolling with an elongation rate between 25% and 35% during the first rolling pass and with a rate elongation less than 15% and preferably between 5% and 10% during the second rolling phase.
- the second rolling with an elongation rate of between 15% and 25% during the first rolling pass and a rate of less than 10% during the second pass of the second cold rolling.
- the second rolling is preferably carried out the second rolling with an elongation rate of between 15% and 25% during the first rolling pass and a rate of less than 10%, during the second pass of the second cold rolling.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Package Frames And Binding Bands (AREA)
- Heat Treatment Of Steel (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Description
- carbone ≤ 0,006 %,
- silicium ≤ 0,02 %,
- 0,15 % ≤ manganèse ≤ 0,25 %,
- soufre ≤ 0,015 %,
- phosphore ≤ 0,017 %,
- azote ≤ 0,006 %,
- aluminium entre 0,02 % et 0,04 %,
Réf tôles | Allongt 1ère passe | TT | Re (MPa) | Allongt 2e passe | Allongt total | Re (Mpa) sortie SP | Re (MPa) après 200°C/20mn |
A | 43 % | 562 | 606 | ||||
B | 31 % | 527 | 9 % | 43 % | 558 | 610 | |
C | 31 % | 20°C/10J | 568 | 9 % | 43 % | 594 | 648 |
E | 31 % | 75°C/3h | 552 | 9 % | 43 % | 616 | 665 |
F | 31 % | 200°C/20mn | 565 | 9% | 43 % | 616 | 668 |
G | 31 % | 20°C/3j | 560 | 9 % | 43 % | 589 | 621 |
Réf tôles | Allongt 1ère passe | TT | Re (MPa) | Allongt 2ème passe | Allongt total | Re (MPa) Sortie SP |
A' | 28 % | 570 | ||||
B' | 20 % | 20°C/3j | 601 | 6 % | 28 % | 595 |
C' | 20 % | 75°C/10h | 600 | 6% | 28 % | 635 |
D' | 20 % | 200°C/20mn | 630 | 6 % | 28 % | 625 |
Claims (5)
- Procédé de fabrication d'une bande de tôle d'acier pour la réalisation d'emballages métalliques par emboutissage, dans lequel :on élabore une bande laminée à chaud en un acier à ultra bas carbone ayant la composition chimique pondérale suivante :carbone ≤ 0,006%silicium ≤ 0,02%0,15% ≤ manganèse ≤ 0,25%soufre ≤ 0,015%phosphore ≤ 0,017%azote ≤ 0,006%aluminium entre 0,02% et 0,04%,on effectue un premier laminage à froid de la bande laminée à chaud pour obtenir une ébauche,on soumet l'ébauche à un recuit de recristallisation en continu,on effectue un second laminage à froid de l'ébauche en au moins deux passes pour obtenir la bande de tôle pour emballage à son épaisseur finale,le second laminage à froid étant réalisé avec un taux d'allongement compris entre 25% et 35% au cours de la première passe de laminage et avec un taux d'allongement inférieur à 15% et de préférence compris entre 5 et 10%, pendant la seconde phase du laminage,et, entre les deux passes du second laminage à froid, on soumet la bande de tôle d'acier à un vieillissement,
- Procédé suivant la revendication 1, caractérisé par le fait qu'on réalise le vieillissement à une température modérée de l'ordre de 75°C pendant une durée de l'ordre de trois heures.
- Procédé suivant la revendication 1, caractérisée par le fait qu'on réalise le vieillissement à une température de l'ordre de 200°C pendant une durée de l'ordre de 20 minutes.
- Procédé de fabrication d'une bande de tôle d'acier pour la réalisation d'emballages métalliques par emboutissage, dans lequel :on élabore une bande laminée à chaud en un acier à bas aluminium renitruré ayant la composition pondérale suivante :carbone compris entre 0,05 et 0,08%manganèse compris entre 0,200 et 0,450%aluminium < 0,020%azote compris entre 0,008 et 0,016%,soufre < 0,020%silicium < 0,020% le reste étant constitué par du fer et des éléments résiduels,on effectue un premier laminage à froid de la bande laminée à chaud pour obtenir une ébauche,on soumet l'ébauche à un recuit de recristallisation en continu,on effectue un second laminage à froid de l'ébauche en au moins deux passes pour obtenir la bande de tôle pour emballage à son épaisseur finale,et, entre les deux passes du second laminage à froid on soumet la bande de tôle d'acier à un vieillissement,
- Bande de tôle en acier à bas aluminium renitruré pour la réalisation d'emballages métalliques par emboutissage présentant à la fois de fortes caractéristiques mécaniques et une bonne aptitude au formage, du type à double réduction, avec un second laminage à froid en deux passes, caractérisée par le fait que l'acier à bas aluminium renitruré présente la composition pondérale suivante :carbone compris entre 0,05 et 0,08%manganèse compris entre 0,200 et 0,450%aluminium < 0,020%azote compris entre 0,008 et 0,016%,soufre < 0,020%silicium < 0,020%,
et qu'elle possède un premier réseau de dislocations ancrées par des éléments en solution constitués par l'un au moins des éléments carbone et azote et un second réseau de dislocations superposé au premier réseau de dislocations.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9712375A FR2769251B1 (fr) | 1997-10-03 | 1997-10-03 | Procede de fabrication d'une bande de tole d'acier pour la realisation d'emballages metalliques par emboutissage et tole d'acier obtenue |
FR9712375 | 1997-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0906961A1 EP0906961A1 (fr) | 1999-04-07 |
EP0906961B1 true EP0906961B1 (fr) | 2002-09-04 |
Family
ID=9511822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402383A Expired - Lifetime EP0906961B1 (fr) | 1997-10-03 | 1998-09-28 | Procédé de fabrication d'une bande de tôle d'acier pour la réalisation d'emballages métalliques par emboutissage et tôle d'acier obtenue |
Country Status (8)
Country | Link |
---|---|
US (1) | US6156131A (fr) |
EP (1) | EP0906961B1 (fr) |
AT (1) | ATE223503T1 (fr) |
CA (1) | CA2246591C (fr) |
DE (1) | DE69807617T2 (fr) |
ES (1) | ES2181143T3 (fr) |
FR (1) | FR2769251B1 (fr) |
PT (1) | PT906961E (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108624741A (zh) * | 2017-03-23 | 2018-10-09 | 中国科学院金属研究所 | 兼具高热稳定性、高强度、高塑性的多相twip钢的制备方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2795740B1 (fr) | 1999-07-01 | 2001-08-03 | Lorraine Laminage | Tole d'acier a bas carbone calme a l'aluminium pour emballage |
FR2795744B1 (fr) * | 1999-07-01 | 2001-08-03 | Lorraine Laminage | Tole d'acier a basse teneur en aluminium pour emballage |
FR2795742B1 (fr) * | 1999-07-01 | 2001-08-03 | Lorraine Laminage | Tole d'acier a moyen carbone calme a l'aluminium pour emballage |
FR2795743B1 (fr) * | 1999-07-01 | 2001-08-03 | Lorraine Laminage | Tole d'acier a basse teneur en aluminium pour emballage |
JP5526483B2 (ja) | 2008-03-19 | 2014-06-18 | Jfeスチール株式会社 | 高強度缶用鋼板およびその製造方法 |
CN107326268B (zh) * | 2017-08-16 | 2019-03-15 | 马鞍山钢铁股份有限公司 | 一种经济型深冲冷轧搪瓷用钢及生产方法 |
CN111266421B (zh) * | 2020-01-22 | 2022-04-12 | 银邦金属复合材料股份有限公司 | 铝钢复合材料及其制备方法和电站空冷设备 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2145057A5 (fr) * | 1971-07-02 | 1973-02-16 | Ferrieux Francois | |
JPS5413846B2 (fr) * | 1973-06-18 | 1979-06-02 | ||
JPS5616650A (en) * | 1979-07-16 | 1981-02-17 | Kawasaki Steel Corp | Cold rolled steel plate for press forming having superior cold formability and artificial age hardenability and its using method |
JPS5779122A (en) * | 1980-11-01 | 1982-05-18 | Nippon Steel Corp | Production of ferritic stainless steel sheet of superior deep draw ability |
JPH0753885B2 (ja) * | 1989-04-17 | 1995-06-07 | 新日本製鐵株式会社 | 磁気特性の優れた一方向性電磁鋼板の製造方法 |
FR2728490B1 (fr) * | 1994-12-21 | 1997-01-24 | Lorraine Laminage | Procede de fabrication d'une bande d'acier destinee a la fabrication par emboutissage et re-emboutissage de recipients en acier |
-
1997
- 1997-10-03 FR FR9712375A patent/FR2769251B1/fr not_active Expired - Fee Related
-
1998
- 1998-09-28 PT PT98402383T patent/PT906961E/pt unknown
- 1998-09-28 DE DE69807617T patent/DE69807617T2/de not_active Expired - Lifetime
- 1998-09-28 EP EP98402383A patent/EP0906961B1/fr not_active Expired - Lifetime
- 1998-09-28 ES ES98402383T patent/ES2181143T3/es not_active Expired - Lifetime
- 1998-09-28 AT AT98402383T patent/ATE223503T1/de not_active IP Right Cessation
- 1998-10-02 CA CA002246591A patent/CA2246591C/fr not_active Expired - Lifetime
- 1998-10-05 US US09/166,126 patent/US6156131A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108624741A (zh) * | 2017-03-23 | 2018-10-09 | 中国科学院金属研究所 | 兼具高热稳定性、高强度、高塑性的多相twip钢的制备方法 |
CN108624741B (zh) * | 2017-03-23 | 2019-10-22 | 中国科学院金属研究所 | 兼具高热稳定性、高强度、高塑性的多相twip钢的制备方法 |
Also Published As
Publication number | Publication date |
---|---|
DE69807617D1 (de) | 2002-10-10 |
CA2246591A1 (fr) | 1999-04-03 |
PT906961E (pt) | 2003-01-31 |
US6156131A (en) | 2000-12-05 |
ATE223503T1 (de) | 2002-09-15 |
DE69807617T2 (de) | 2003-07-31 |
CA2246591C (fr) | 2007-04-10 |
FR2769251B1 (fr) | 1999-12-24 |
ES2181143T3 (es) | 2003-02-16 |
EP0906961A1 (fr) | 1999-04-07 |
FR2769251A1 (fr) | 1999-04-09 |
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