WO2000066287A1 - Procede de fabricaton, en continu, d'une bande metallique - Google Patents
Procede de fabricaton, en continu, d'une bande metallique Download PDFInfo
- Publication number
- WO2000066287A1 WO2000066287A1 PCT/FR2000/001161 FR0001161W WO0066287A1 WO 2000066287 A1 WO2000066287 A1 WO 2000066287A1 FR 0001161 W FR0001161 W FR 0001161W WO 0066287 A1 WO0066287 A1 WO 0066287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolling
- strip
- thickness
- diameter
- cold rolling
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/12—End of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
Definitions
- the subject of the invention is a process for manufacturing, on a continuous line, a metal strip such as a rolled steel sheet, from a strip produced hot. It is known that, in general, the manufacture of metal products requires first of all the preparation of a raw product by casting in an ingot mold or continuous casting, a hot transformation by forging and / or hot rolling and a cold transformation comprising various stages which depend on the nature of the metal, for example ferritic or austenitic steel, and on the quality of the product to be manufactured.
- the hot product is subjected, successively, to a pickling treatment for the removal of scale, to cold rolling until the desired thickness is obtained and, finally, to finishing treatments.
- Cold rolling is normally carried out in several successive passes, either in two opposite directions on a reversible train, or on several rolling mill stands operating in tandem.
- the rolling force to be applied to obtain a certain rate of thickness reduction depends, of course, on the diameter of the working rolls and the composition of the metal, common low-carbon steel, low alloy, stainless steel, alloy steel, as well as its characteristics, in particular its elastic limit.
- the methods of preparation and heat treatment have made it possible to produce coils of hot strip of relatively large thickness.
- the thickness reduction rate to be achieved was therefore important, generally of the order of 70% to 80% and up to 90% for certain qualities of steel.
- Rolling mills capable of developing the necessary power are very expensive and, usually, coupled line installations are therefore optimized by favoring the operation of the tandem rolling mill which constitutes the bottleneck of the installation.
- the rolling mill must at least slow down at the reel change and, if the running speed decreases, the coefficient of friction increases, as well as the rolling force to be applied between the working rolls to obtain the desired thickness reduction.
- the deformations and buckling of the cage also increase. We have therefore observed that there is a limit below which can no longer be laminated by ensuring thickness regulation.
- the strip is sheared at a relatively high speed by means of a so-called "flying" shear and two winding mandrels are actuated successively so that, during the time necessary for the unloading of the coil wound on a first mandrel, the strip can be engaged and begins to wind on the second mandrel, immediately after shearing.
- the quality of the strip is only affected by a low value, 1% or a few%, and over a short distance, which can be limited to a few meters.
- the performance of tracking the entire installation remains acceptable.
- the outer face of the coil which serves as packaging for the latter can, in any case, be more or less deteriorated during handling and is therefore sacrificed.
- the object of the invention is to remedy such drawbacks by means of a new manufacturing process, in a continuous line, for a laminated sheet, which makes it possible to adapt, in a very flexible manner, to a change in production conditions, while retaining the possibility, in all cases, of solving all of the problems mentioned above.
- the invention makes it possible to maintain the regularity of thickness and, in general, the quality of the sheet over a length of strip at least of the same order as in the most efficient current installations and, even, practically on the whole of a coil.
- the invention therefore relates, in general, to the manufacture of a metal strip from a hot product, by passing it through, in a continuous processing line comprising at least, in one direction feed, web, inlet section, pickling section for scale removal, accumulation section, cold rolling means and outlet section comprising a shearing member and means winding.
- the rolling speed is varied over a wide range, which can range from less than 1 m / min. at more than 1000 m / min and the cold rolling is carried out in at most three passes between working rolls whose diameter is determined so that the rolling force necessary to maintain the rate of reduction in thickness at each pass remains compatible, over the entire speed variation range, with the possibilities of regulating the thickness and flatness of the product, taking account of its characteristics.
- the invention can have advantages for all types of steel but, in practice, it applies essentially to the manufacture of strips of ordinary steel, low carbon and / or low alloy, and / or low elastic limit.
- working rolls whose diameter does not exceed 200 mm are used for cold rolling.
- the diameter of the rolls will be determined so that the rolling force required at the lowest speeds does not exceed twice the rolling force at the highest speeds.
- the invention applies especially to the manufacture of mild or low-alloy steel sheets for which the rolling operation can advantageously be limited to two passes, taking into account the elastic limit of the steel and the rate of reduction to be achieved.
- an oil-in-water emulsion is used, the saponification index of which does not exceed 50.
- the invention also covers a continuous line installation industrial production of a strip of steel sheet for the implementation of the method, successively comprising: a primary pickling section for the removal of scale; - a continuous cold rolling section;
- An output section comprising a strip shearing member for fractionation and reeling and a strip winding device.
- the invention applies to the production of sheets of mild, low carbon and / or low alloy steel and covers an installation in which the rolling section comprises at most three stands, the member shearing is of fixed type and the winding device comprises a single winding mandrel, such an installation being particularly economical.
- the pickling section can be of the chemical or electrochemical type and can then comprise a leveling device under tension of the "oxide-breaker" type.
- the pickling section can also include a blasting device and / or an abrasion device.
- cold rolling is carried out in rolling mill stands equipped with small diameter working rolls.
- multi-cylinder cages with intermediate cylinders arranged in a cluster of the "cluster mill” type or rolling mill cages whose working cylinders are associated with lateral support cylinders in particular of the " Z-high ".
- the rolling stands will advantageously be equipped with a device for controlling the flatness of the strips.
- at least one support cylinder will be of the deformable rotating envelope type.
- the fractionation cutting point can be at a distance such from the reel that the developed length of strip up to the grip of the last cage of rolling mill is greater than 20 meters, the regularity of thickness remaining assured in the part which constitutes the body of the strip.
- the method according to the invention can also be applied to lines the fractionation cutting point of which is at a distance such that the developed length of the strip up to the extent of the last stand of the rolling mill is less than 20 meters, the thickness tolerance being tightened in the part which constitutes the ends of the strip.
- a continuous line installation according to the invention can also be used to treat strips produced hot which require only a small or zero thickness reduction, the last cold rolling pass simply carrying out a finishing treatment of the "skin-pass" type.
- the rolling mill cages will then advantageously be quarto cages of the "Z-high" type in which each assembly constituted by a working cylinder, an intermediate cylinder and lateral support cylinders constitutes an insert which can be easily replaced by a cylinder. large diameter work to form a quarto-type cage working as a skin-pass.
- the last large diameter cage can advantageously be used to print on the sheet a relatively large roughness, for example of at least 0.4 micrometers, to facilitate the adhesion of a protective coating.
- FIG. 1 schematically represents a coupled sheet metal production line for implementing the method according to the invention.
- FIG. 2 schematically represents another configuration of coupled line according to the invention.
- FIG. 3 is a diagram representing the evolution of the rolling force as a function of the speed for large diameters of working rolls and for small diameters.
- FIG. 4 is a diagram of the evolution of the coefficient of friction with a lubricant suitable for the two cases of FIG. 3.
- FIG 1 there is shown schematically a coupled line comprising an inlet section A, a pickling section B, a rolling section C and an outlet section D.
- the inlet section A has not been shown in detail and includes a reel unwinder and a sealer
- the hot strip which comes from a coil, not shown, unrolls from left to right, first passing through a pickling station 1 intended to remove the existing scale on the hot prepared sheet.
- This unit can be of known type: chemical pickling, pickling by brushing, shot blasting, abrasion or even a combination of several techniques. It can advantageously be preceded by a leveling device under traction 2 whose role is to crack the scale to facilitate the action of a chemical pickling.
- the pickling station 2 is particularly suitable for processing a tonnage high annual band, the thickness of which may be appreciably less than in the coupled installations known up to now, for example less than one millimeter.
- the pickling line 1 will therefore be designed to operate at a high speed and this will be kept substantially constant, without admitting significant stops or even slowdowns to adapt to the operation of the rolling installation 3 placed downstream.
- the rolling section 3 is connected to the pickling section 1 by means of a strip accumulator device 4 associated with a tensioning block 5. This arrangement makes it possible to slow down or stop the rolling mill without disturbing the operation of pickling.
- the speed in the pickling section depends on the pickling process and the characteristics of the steel of the hot-formed sheet.
- the accumulator has the capacity necessary to maintain the operation of pickling at its optimum speed during the time when the rolling speed is different from that of pickling, the tensioning block ensuring separate control of the pulls in the two sections.
- cold tandem rolling mills comprise a succession of cages arranged one after the other on the path of the strip, the thickness of which is progressively reduced.
- the strip is kept perfectly stretched in the space between two successive cages or inter-cage space, by adjusting the traction in the strip to a predetermined value which depends on the characteristics of the product being rolled.
- rolling conditions are maintained in each of the cages such that it is possible to avoid reaching tensile levels which risk causing the strip to break.
- the regulation of the cold tandem train is ensured so as to obtain a perfectly constant exit thickness from the strip, in particular by regulating the rolling force applied by the clamping device as well as the speeds of the first and last stand.
- rolling mill stands include means for adjusting the clamping force applied, during rolling, between the rolls of the rolling mill which make it possible, in particular, to compensate for the deformation of the cage under the rolling force, to keep the thickness of the product substantially constant at the outlet of the cage.
- These clamping devices are generally constituted by hydraulic cylinders, bearing, in a quarto rolling mill, on the ends of a large diameter support cylinder.
- at least one stand of the rolling mill 3 is provided with a device for correcting flatness defects by modifying the distribution of the stresses along the bearing generator.
- the object of the invention is to adapt to various needs, by acting very flexibly on the operating conditions of the installation, in particular the rolling speed, while retaining the possibility to maintain the quality of the laminated strip over the greatest possible length.
- the respective influences of the various factors involved in the rolling process have been studied in detail.
- an essential parameter for ensuring, under given conditions, the desired reduction in thickness is the diameter of the working rolls.
- the cooling is carried out, normally, by sprinkling a heat transfer fluid but the coefficient of friction between the rolls and the product, which also intervenes in the rolling process, depends on the lubricating power of this fluid. It has been established that the maximum possible reduction in thickness during a rolling pass can be given by the formula:
- ⁇ is the coefficient of friction
- F the rolling force
- T s and T e the output and input pulls of the rolling stand
- D the diameter of the working rolls.
- This formula (1) shows, in particular, that the reduction in thickness depends not only on the diameter of the rolls, but also on the coefficient of friction and the rolling force.
- FIGS. 3 and 4 show, for a common steel, and according to the diameter of the working rolls, the variations, as a function of the running speed indicated on the abscissa, respectively of the rolling force to be applied and the coefficient of friction .
- the diagrams have been established for mild steel with a fairly low elastic limit, of the order of 25 kg / mm 2 .
- the curves A1 and B1 correspond to a rolling carried out between working rolls having, as usual, a fairly large diameter of the order of 500 mm.
- the curve Al shows that, as indicated, the rolling force, which varies little enough for high speeds, increases rapidly, starting from a limit speed which, for a cylinder diameter of 500 mm and for l 'steel considered, is of the order of 400 m / min.
- FIG. 3 shows that, for a current steel with low elastic limit, there is a very large difference in the evolution of the rolling force to be applied, between the curve Al which corresponds to a diameter of 500 mm and the curve A2 which corresponds to a diameter of 140 mm.
- the curve Al which corresponds to a diameter of 500 mm
- the curve A2 which corresponds to a diameter of 140 mm.
- curve A2 shows that, for a diameter of 140 mm for example, the rolling force varies little when the rolling speed is lowered, from around 300 m / min and then increases only very gradually, reaching 500 rpm at practically zero speed.
- the curve Bl of FIG. 4 established for a cylinder diameter of 500 mm, shows in fact that, if the speed is reduced from a normal speed of rolling of 1000 m / min, for example, the coefficient of friction initially varies very little up to a speed of the order of 400 m / min but then increases rapidly below this speed. Furthermore, formula (1) above shows that, if the diameter of the cylinders decreases, the coefficient of friction must be increased to ensure the reduction in thickness.
- the curve B2 represents, with such a lubricant and for a diameter of 140 mm, the variations in the coefficient of friction as a function of the rolling speed. It appears that, in this case, the coefficient of friction remains, over the entire speed range, greater than that which is usually obtained with a diameter of 500 mm.
- the use, in rolling cages of small diameter rolls, for example less than 200 mm, with a suitable lubricant makes it possible to vary the rolling speed within a range very wide ranging from high values, of the order of 1000 m / min to the lowest values, or even zero speed, while limiting the rolling force necessary for the desired reduction to a level below the limit L2 .
- This therefore allows tight thickness tolerances to be maintained over the entire length of the strips, body and ends included and regardless of the speed at which they have been laminated.
- the method according to the invention therefore makes it possible to produce, from a hot-drawn steel strip, a pickled and cold-rolled strip having an improved thickness regularity in an extended speed range, particularly in the low range. and very low rolling speeds.
- Such rolling mills which are said to be of the "Z-high” or “cluster-mill” type, are normally more expensive than conventional rolling mills, and, until now, were used mainly for hard steels, for example high carbon and / or stainless steels.
- the strip is simply stripped and then, optionally, "skin-pass" laminated and is then protected by oil spraying.
- the rolling being carried out, if necessary, in a separate section. If you want to use a coupled line, you must then place a switch downstream of the pickling section to direct the strip towards a "skin-pass" rolling mill, an oiling station and a winder, the tandem rolling mill being not used in this case.
- the invention therefore essentially applies to the manufacture of strips of ordinary steel requiring only a low or zero reduction rate and which, until now, have been produced discontinuously, the usual coupled lines not being profitable in that case.
- the invention makes it possible to benefit from the progress made in the production and hot treatment lines, in particular by continuous casting of thin strip, which make it possible to obtain hot strips of much smaller thickness than previously.
- hot strips were produced at a relatively high thickness, for example 2 to 6 mm.
- this thickness for example 2 to 6 mm.
- the evolution of the technique has made it possible to progressively reduce this thickness up to 1.2 mm and it is even possible to envisage having hot strips of even smaller thickness, up to less than 1 mm, for example.
- the rolling section may comprise only two or three cages with small rolls and, in this case, the use of "Z-high" type cages becomes profitable.
- the share of the rolling mill in the overall cost of an installation according to the invention decreases compared to the other sections of the line. Indeed, while in the coupled lines known up to now, it was necessary to have a significant rolling power to achieve the desired reduction in thickness, we can now consider reducing this rolling power and, by Consequently, the cost of the rolling installation, when the thickness reduction rate to be achieved does not exceed 50%.
- An industrial line according to the invention comprises at the output a winding device 7 preceded by a strip splitting device 6 for constituting easily transportable reels.
- the method according to the invention makes it possible to improve the thickness tolerance even at very low rolling speeds as well as over the rolled length without tension during restarting. It is then possible, without increasing the setting rate to the mile, to envisage new configurations of coupled line in which in particular, the last rolling stand may be located at a fairly great distance from the reel.
- an oiling device 8 intended to give corrosion protection to the finished product and a block have been placed between the outlet of the rolling installation 3 and the reel 7 powerful tensioner 9 allowing, on the one hand to pull the strip out of the pickling, even in the absence of lamination and, on the other hand, to maintain traction in the strip when it is cut to complete a reel.
- This further promotes the maintenance of tight thickness tolerances by avoiding variations in traction in the grip of the last rolling stand.
- an installation according to the invention therefore makes it possible to continuously carry out an average reduction in thickness. and, therefore, to increase the production range without considerably increasing the cost of the assembly.
- At least one stand of the rolling mill 3 is advantageously of the "Z-high” type.
- this can be transformed by making each assembly consisting of a small diameter cylinder, an intermediate cylinder and lateral supports, in the form of an "insert" which can be replaced by a larger diameter cylinder , for example greater than 500 mm, so as to produce a quarto-type cage which can perform a skin-pass treatment between the working rolls.
- Another advantage of a coupled line according to the invention will therefore be to be able to use part of the production time to produce coils of sheets whose thickness is directly that of the strip produced hot and which does not require reduction d 'cold thickness but only one pickling and one finishing pass of the skin-pass type. It is thus very easy to increase the possibilities of an existing line.
- the invention makes it possible to respond flexibly to such a request.
- the last rolling stand may be equipped with working rolls having a conventional diameter and a roughness of 3 to 4 microns, allowing , taking into account the transfer rate, for example 40%, to give the sheet obtained the desired roughness.
- the line shown diagrammatically in FIG. 2 comprises a stripping section 1 and a rolling section 3 between which is placed a device 2 for accumulating tape 4 and a traction control block 5.
- a device for leveling under traction - oxide breeze can also be installed upstream of the pickling section 1. The outlet of such a line then simply comprises the shearing device 6, for the fractionation, followed by the winding device 7.
- the strip in the grip is out of tension which, in the conventional processes would generate an abrupt variation of the thickness.
- the distance between the fractionation point and the hold of the last cage is short and generally less than 20 meters in developed length of laminated strip. This zone is therefore located in the ends of the strip, the thickness tolerance of which is traditionally less tight than that of the strip body.
- the use of a method according to the invention however makes it possible to improve this tolerance of thickness during slowing down and until stopping, as well as over the laminated length without tension during restarting, so that the ends strips respect the thickness tolerance set by the customer.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00925357A EP1100632B1 (fr) | 1999-04-28 | 2000-04-28 | Procede de fabricaton, en continu, d'une bande metallique |
US09/720,491 US6463777B1 (en) | 1999-04-28 | 2000-04-28 | Method for the continuous production of a metal strip |
DE60004948T DE60004948T2 (de) | 1999-04-28 | 2000-04-28 | Verfahren zur kontinuierlichen herstellung eines metallbandes |
BR0006054-2A BR0006054A (pt) | 1999-04-28 | 2000-04-28 | Processo de fabricação de uma tira metálica, e, linha industrial contìnua de fabricação de uma tira de chapa de aço. |
AT00925357T ATE248663T1 (de) | 1999-04-28 | 2000-04-28 | Verfahren zur kontinuierlichen herstellung eines metallbandes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/05393 | 1999-04-28 | ||
FR9905393A FR2792857B1 (fr) | 1999-04-28 | 1999-04-28 | Procede de fabrication, en continu, d'une bande metallique |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000066287A1 true WO2000066287A1 (fr) | 2000-11-09 |
Family
ID=9544978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/001161 WO2000066287A1 (fr) | 1999-04-28 | 2000-04-28 | Procede de fabricaton, en continu, d'une bande metallique |
Country Status (9)
Country | Link |
---|---|
US (1) | US6463777B1 (fr) |
EP (1) | EP1100632B1 (fr) |
CN (2) | CN1257025C (fr) |
AT (1) | ATE248663T1 (fr) |
BR (1) | BR0006054A (fr) |
DE (1) | DE60004948T2 (fr) |
ES (1) | ES2204575T3 (fr) |
FR (1) | FR2792857B1 (fr) |
WO (1) | WO2000066287A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2898523B1 (fr) * | 2006-03-14 | 2009-02-27 | Alstom Power Conversion Sa | Procede de laminage d'une bande de tole. |
CN102729049A (zh) * | 2012-07-17 | 2012-10-17 | 江苏龙源金属科技有限公司 | 轧制生产线中的连续供料装置 |
US10471502B2 (en) * | 2013-12-26 | 2019-11-12 | Posco | Continuous casting and rolling apparatus and method |
EP3023167B1 (fr) * | 2014-02-27 | 2017-10-04 | Totsky, Ivan Timofeevich | Précédé de préparation de produit semi-fini en acier laminé à chaud en vue du laminage à froid |
CN107486470A (zh) * | 2017-09-20 | 2017-12-19 | 大连民族大学 | 一种高效节能的冷连轧生产线及其工作方法 |
DE102020206176A1 (de) * | 2019-12-11 | 2021-06-17 | Sms Group Gmbh | Vorrichtung und Verfahren zum flexiblen Beeinflussen der Prozessführung, insbesondere Temperaturführung, eines entlang einer einzelnen Durchlauflinie durchgeleiteten Metallproduktes mittels mindestens zweier benachbarter Segmente |
CN112742868B (zh) * | 2020-12-10 | 2022-09-13 | 安阳钢铁股份有限公司 | 一种普通取向硅钢六辊五机架冷连轧一次冷轧工艺 |
CN113500098B (zh) * | 2021-08-20 | 2023-04-07 | 山西太钢不锈钢股份有限公司 | 五机架六辊连轧机消除超纯铁素体不锈钢轧制色差的方法 |
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FR2553312A1 (fr) * | 1983-10-14 | 1985-04-19 | Clecim Sa | Procede de reglage de l'epaisseur et du profil d'un produit plat en cours de laminage |
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JPS63119913A (ja) * | 1986-11-06 | 1988-05-24 | Ishikawajima Harima Heavy Ind Co Ltd | 多段圧延機 |
JPH0824908A (ja) * | 1994-07-19 | 1996-01-30 | Nisshin Steel Co Ltd | ステンレス鋼および高合金鉄帯体の圧延方法 |
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JPH1058010A (ja) * | 1996-08-27 | 1998-03-03 | Sumitomo Metal Ind Ltd | フェライト系ステンレス鋼帯の冷間圧延方法 |
JPH10175002A (ja) * | 1996-12-18 | 1998-06-30 | Ishikawajima Harima Heavy Ind Co Ltd | 段数切替え多段圧延機 |
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JPS6028887B2 (ja) * | 1980-04-11 | 1985-07-08 | 新日本製鐵株式会社 | 連続冷延焼鈍設備 |
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1999
- 1999-04-28 FR FR9905393A patent/FR2792857B1/fr not_active Expired - Fee Related
-
2000
- 2000-04-28 CN CNB008009309A patent/CN1257025C/zh not_active Expired - Fee Related
- 2000-04-28 ES ES00925357T patent/ES2204575T3/es not_active Expired - Lifetime
- 2000-04-28 CN CNA2006100673810A patent/CN1840251A/zh active Pending
- 2000-04-28 EP EP00925357A patent/EP1100632B1/fr not_active Expired - Lifetime
- 2000-04-28 WO PCT/FR2000/001161 patent/WO2000066287A1/fr active IP Right Grant
- 2000-04-28 AT AT00925357T patent/ATE248663T1/de not_active IP Right Cessation
- 2000-04-28 DE DE60004948T patent/DE60004948T2/de not_active Expired - Lifetime
- 2000-04-28 US US09/720,491 patent/US6463777B1/en not_active Expired - Fee Related
- 2000-04-28 BR BR0006054-2A patent/BR0006054A/pt not_active IP Right Cessation
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JOUET J ET AL: "LE DECAPAGE-TANDEM COUPLE DE SAINTE-AGATHE A SOLLAC FLORANGE: POINTAPRES DIX ANNEES D'EXPLOITATION", CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE,FR,REVUE DE METALLURGIE. PARIS, vol. 95, no. 3, pages 377-382, XP000765162, ISSN: 0035-1563 * |
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Also Published As
Publication number | Publication date |
---|---|
US6463777B1 (en) | 2002-10-15 |
CN1306463A (zh) | 2001-08-01 |
EP1100632A1 (fr) | 2001-05-23 |
CN1840251A (zh) | 2006-10-04 |
CN1257025C (zh) | 2006-05-24 |
ES2204575T3 (es) | 2004-05-01 |
DE60004948D1 (de) | 2003-10-09 |
DE60004948T2 (de) | 2004-07-22 |
BR0006054A (pt) | 2001-03-20 |
FR2792857A1 (fr) | 2000-11-03 |
EP1100632B1 (fr) | 2003-09-03 |
ATE248663T1 (de) | 2003-09-15 |
FR2792857B1 (fr) | 2001-07-27 |
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