EP0094328B1 - Procédé de fabrication de produits en alliage d'aluminium aptes à l'étirage - Google Patents
Procédé de fabrication de produits en alliage d'aluminium aptes à l'étirage Download PDFInfo
- Publication number
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- temperature
- aluminium alloy
- carried out
- galling
- 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
Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 6
- 230000008569 process Effects 0.000 title description 5
- 238000005266 casting Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000011282 treatment Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 238000010409 ironing Methods 0.000 claims 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 9
- 239000011572 manganese Substances 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 8
- 229910052749 magnesium Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000001680 brushing effect Effects 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004040 coloring Methods 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 241000287107 Passer Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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.
Landscapes
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Metal Rolling (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
- Continuous Casting (AREA)
- Powder Metallurgy (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8207924 | 1982-04-30 | ||
| FR8207924A FR2526047A1 (fr) | 1982-04-30 | 1982-04-30 | Procede de fabrication de produits en alliage d'aluminium aptes a l'etirage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0094328A1 EP0094328A1 (fr) | 1983-11-16 |
| EP0094328B1 true EP0094328B1 (fr) | 1985-10-09 |
Family
ID=9273809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83420075A Expired EP0094328B1 (fr) | 1982-04-30 | 1983-04-29 | Procédé de fabrication de produits en alliage d'aluminium aptes à l'étirage |
Country Status (19)
Families Citing this family (21)
| 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 |
| CA2293608A1 (en) | 1997-06-04 | 1998-12-10 | Golden Aluminum Company | Continuous casting process for producing aluminum alloys having low earing |
| US5985058A (en) * | 1997-06-04 | 1999-11-16 | Golden Aluminum Company | Heat treatment process for aluminum alloys |
| US5976279A (en) | 1997-06-04 | 1999-11-02 | Golden Aluminum Company | For heat treatable aluminum alloys and treatment process for making same |
| US5993573A (en) * | 1997-06-04 | 1999-11-30 | Golden Aluminum Company | Continuously annealed aluminum alloys and process for making same |
| US20030173003A1 (en) * | 1997-07-11 | 2003-09-18 | Golden Aluminum Company | Continuous casting process for producing aluminum alloys having low earing |
| RU2171327C1 (ru) * | 1999-12-06 | 2001-07-27 | Акционерное общество открытого типа "Калужский завод путевых машин и гидроприводов" | Путеукладочный кран |
| RU2171312C1 (ru) * | 2000-07-05 | 2001-07-27 | Открытое акционерное общество "Объединенная компания "Сибирский Алюминий" | Способ изготовления листов и лент из алюминиевых сплавов |
| RU2181388C1 (ru) * | 2001-05-29 | 2002-04-20 | Общество с ограниченной ответственностью Торговый Дом "Русская фольга" | Способ изготовления фольги из алюминиевых сплавов для последующей штамповки |
| AU2003215101A1 (en) * | 2002-02-08 | 2003-09-02 | Nichols Aluminum | Method of manufacturing aluminum alloy sheet |
| WO2003066927A1 (en) * | 2002-02-08 | 2003-08-14 | Nichols Aluminium | Method and apparatus for producing a solution heat treated sheet |
| RU2288064C1 (ru) * | 2005-04-04 | 2006-11-27 | Открытое Акционерное Общество "Тяжпрессмаш" | Способ получения круглых заготовок для листовой штамповки |
| RU2340701C2 (ru) * | 2007-01-09 | 2008-12-10 | Государственное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ГОУВПО "КубГТУ") | Способ получения листового алюминия |
| DE102013013407B4 (de) * | 2013-08-07 | 2015-05-28 | Salzgitter Flachstahl Gmbh | Verfahren zur Herstellung von Schneid- und Zerspanwerkzeugen aus Stahl mit verbesserter Standzeit |
| AU2014317870B2 (en) * | 2013-09-06 | 2018-02-15 | Arconic Technologies Llc | Aluminum alloy products and methods for producing same |
| KR102213570B1 (ko) * | 2016-06-28 | 2021-02-08 | 노벨리스 인크. | 양극산화된-품질 알루미늄 합금 및 관련된 제품 및 방법 |
| US11806779B2 (en) | 2016-10-27 | 2023-11-07 | Novelis Inc. | Systems and methods for making thick gauge aluminum alloy articles |
| AU2017350513B2 (en) | 2016-10-27 | 2020-03-05 | Novelis Inc. | High strength 7xxx series aluminum alloys and methods of making the same |
| CN109890535A (zh) | 2016-10-27 | 2019-06-14 | 诺维尔里斯公司 | 高强度6xxx系列铝合金及其制造方法 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1198006A (fr) * | 1958-01-31 | 1959-12-04 | Pechiney Prod Chimiques Sa | Coulée continue des métaux |
| US3486947A (en) * | 1967-06-21 | 1969-12-30 | Olin Mathieson | Enhanced structural uniformity of aluminum based alloys by thermal treatments |
| CH493642A (de) * | 1967-12-29 | 1970-07-15 | Alusuisse | Verfahren zur Herstellung von feinkörnigen Bändern aus manganhaltigen Aluminium-Legierungen |
| 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 (de) * | 1978-03-09 | 1979-09-13 | Metallgesellschaft Ag | Verfahren zur weiterbehandlung von aus einer aluminium-mangan-legierung hergestellten blechen und baendern |
| US4163665A (en) * | 1978-06-19 | 1979-08-07 | Alumax Mill Products, Inc. | Aluminum alloy containing manganese and copper and products made therefrom |
| US4235646A (en) * | 1978-08-04 | 1980-11-25 | Swiss Aluminium Ltd. | Continuous strip casting of aluminum alloy from scrap aluminum for container components |
| DE2929724C2 (de) * | 1978-08-04 | 1985-12-05 | Coors Container Co., Golden, Col. | Verfahren zum Herstellen eines Bandes aus einer Aluminiumlegierung für Dosen und Deckel |
| US4269632A (en) * | 1978-08-04 | 1981-05-26 | Coors Container Company | Fabrication of aluminum alloy sheet 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/fr 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 GR GR71195A patent/GR71597B/el unknown
- 1983-04-25 AR AR292805A patent/AR231151A1/es active
- 1983-04-25 CA CA000426641A patent/CA1203068A/fr not_active Expired
- 1983-04-25 JP JP58072762A patent/JPS58199854A/ja active Granted
- 1983-04-26 IN IN500/CAL/83A patent/IN159293B/en unknown
- 1983-04-26 GB GB08311283A patent/GB2119294B/en not_active Expired
- 1983-04-27 SU SU833586955A patent/SU1306484A3/ru active
- 1983-04-27 TR TR21513A patent/TR21513A/xx unknown
- 1983-04-28 MA MA20004A patent/MA19784A1/fr unknown
- 1983-04-28 AU AU14033/83A patent/AU550513B2/en not_active Ceased
- 1983-04-29 DE DE8383420075T patent/DE3360967D1/de not_active Expired
- 1983-04-29 EP EP83420075A patent/EP0094328B1/fr not_active Expired
- 1983-04-29 BR BR8302222A patent/BR8302222A/pt unknown
- 1983-04-29 NO NO831516A patent/NO831516L/no unknown
- 1983-04-29 ES ES521949A patent/ES8402620A1/es not_active Expired
-
1986
- 1986-12-30 MY MY318/86A patent/MY8600318A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US4441933A (en) | 1984-04-10 |
| JPS6242025B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-09-05 |
| PH18237A (en) | 1985-05-03 |
| MY8600318A (en) | 1986-12-31 |
| NO831516L (no) | 1983-10-31 |
| GB2119294B (en) | 1985-09-25 |
| FR2526047B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1984-10-05 |
| GB2119294A (en) | 1983-11-16 |
| JPS58199854A (ja) | 1983-11-21 |
| EP0094328A1 (fr) | 1983-11-16 |
| AU550513B2 (en) | 1986-03-20 |
| CA1203068A (fr) | 1986-04-15 |
| GB8311283D0 (en) | 1983-06-02 |
| DE3360967D1 (en) | 1985-11-14 |
| TR21513A (tr) | 1984-07-01 |
| MA19784A1 (fr) | 1983-12-31 |
| GR71597B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1983-06-17 |
| ES521949A0 (es) | 1984-02-01 |
| IN159293B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-04-25 |
| FR2526047A1 (fr) | 1983-11-04 |
| AU1403383A (en) | 1983-11-03 |
| BR8302222A (pt) | 1984-01-03 |
| AR231151A1 (es) | 1984-09-28 |
| SU1306484A3 (ru) | 1987-04-23 |
| ES8402620A1 (es) | 1984-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0094328B1 (fr) | Procédé de fabrication de produits en alliage d'aluminium aptes à l'étirage | |
| EP1228254B1 (fr) | Procede de fabrication de bandes d'acier au carbone, notamment d'acier pour emballages | |
| CA1304276C (fr) | Toles en alliage d'aluminium contenant du magnesium aptes a la fabrication par emboutissage-etirage de corps de boites et procede d'obtention desdites toles | |
| WO2009147309A1 (fr) | Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore | |
| EP3817880B1 (fr) | Fil électrode a couche poreuse pour électroerosion et procédés de réalisation d'un tel fil électrode | |
| CA2715174C (fr) | Procede de revetement d'une bande metallique et installation de mise en oeuvre du procede | |
| FR2595684A1 (fr) | Procede de lubrification d'un moule pour la fabrication d'un recipient en verre | |
| EP0983129B1 (fr) | Procede de fabrication de bandes en alliages d'aluminium par coulee continue mince entre cylindres | |
| EP0660882B1 (fr) | Procede de fabrication d'une feuille mince apte a la confection d'elements constitutifs de boites | |
| FR2486601A1 (fr) | Materiaux pour paliers et leurs procedes de fabrication | |
| EP1187691A1 (fr) | Procede de coulee continue entre cylindres de bandes d'acier inoxydable ferritique exemptes de microcriques | |
| EP0939141B1 (fr) | Tôle dotée d'un revêtement d'aluminium résistant à la fissuration | |
| CA1107179A (fr) | Procede d'obtention d'un element allonge en acier dur | |
| CA1106265A (fr) | Procede de traitement thermique et de trempe des pieces forgees | |
| EP0988901A1 (fr) | Procédé de fabrication d'une bande mince en acier inoxydable | |
| BE1014417A3 (fr) | Procede de recuit continu pour l'obtention d'un etat de surface ameliore. | |
| BE567151A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| BE488481A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| CH286866A (fr) | Procédé de fabrication de tôles en matière ferreuse revêtues d'aluminium et tôle revêtue obtenue par ce procédé. | |
| FR2707668A1 (fr) | Procédé de fabrication d'une feuille mince apte à la confection de couvercles de boîtes. | |
| BE570815A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| BE1005224A7 (fr) | Procede de fabrication de fil machine a haute resistance en acier dur et dispositif pour sa mise en oeuvre. | |
| Plassart et al. | Formation and evolution during cold rolling of the surface layers of two metal alloys (Al-Mg, IF-Ti steel) | |
| FR2657887A1 (fr) | Procede d'aluminisation de toles d'acier magnetique a grains orientes et toles d'acier magnetique obtenues selon ce procede. | |
| BE512050A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE CH DE FR IT LI LU SE |
|
| 17P | Request for examination filed |
Effective date: 19831203 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CEGEDUR SOCIETE DE TRANSFORMATION DE L'ALUMINIUM P |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Designated state(s): BE CH DE FR IT LI LU SE |
|
| ITF | It: translation for a ep patent filed | ||
| REF | Corresponds to: |
Ref document number: 3360967 Country of ref document: DE Date of ref document: 19851114 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19860430 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19880430 Ref country code: LI Effective date: 19880430 Ref country code: CH Effective date: 19880430 |
|
| BERE | Be: lapsed |
Owner name: CEGEDUR SOC. DE TRANSFORMATION DE L'ALUMINIUM PEC Effective date: 19880430 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19881229 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19890103 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19890430 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 83420075.0 Effective date: 19890726 |