EP1085949B1 - Verfahren zur herstellung von metallischen profilen mit polygonalem querschnitt durch kontinuierliches giessen mit hilfe eines rillengiessrades und kontinuierliches walzen - Google Patents

Verfahren zur herstellung von metallischen profilen mit polygonalem querschnitt durch kontinuierliches giessen mit hilfe eines rillengiessrades und kontinuierliches walzen Download PDF

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Publication number
EP1085949B1
EP1085949B1 EP99925059A EP99925059A EP1085949B1 EP 1085949 B1 EP1085949 B1 EP 1085949B1 EP 99925059 A EP99925059 A EP 99925059A EP 99925059 A EP99925059 A EP 99925059A EP 1085949 B1 EP1085949 B1 EP 1085949B1
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European Patent Office
Prior art keywords
section
rollers
process according
cross
aluminium alloy
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Expired - Lifetime
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EP99925059A
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English (en)
French (fr)
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EP1085949A1 (de
Inventor
Christian Gourdet
Gérard Thomas
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Rio Tinto France SAS
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Aluminium Pechiney SA
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Publication of EP1085949A1 publication Critical patent/EP1085949A1/de
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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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045—Manufacture of wire or bars with particular section or properties
    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0028—Drawing the rolled product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the invention relates to a method for manufacturing metal profiles, in particular of aluminum alloys, continuously rolled by a series of pairs of rollers from a blank obtained by continuous casting in a grooved wheel, possibly followed by one or more stages of drawing or drawing and annealing.
  • the blank generally of triangular or trapezoidal section, is then laminated. continuously through a series of successive cages formed of two rollers, and alternately horizontal and vertical, to obtain a wire of circular section, which can be used as is or processed by wire drawing.
  • the object of the invention is to remedy this drawback and to allow control precise geometry of the section of the rolled product, when this section includes a polygonal part, that is to say at least two intersecting straight parts.
  • the profile laminate can then be used directly as it is, or drawn or drawn to obtain a non-circular section wire, with a smaller number of passes than from a circular section.
  • the invention also relates to a method for manufacturing metal profiles drawn or drawn partially or fully polygonal in section from blanks of partially or totally polygonal cross-section obtained by continuous casting in a grooving and continuous rolling wheel, in which the number of drawing passes or wire drawing and the number of anneals are each reduced by at least a third compared to to the process of the prior art starting from a roughly substantially circular section blank.
  • FIG. 1 represents a continuous casting machine on a grooved wheel and the train continuous rolling of the blank.
  • Figures 2 to 5 show, in section through the plane of their axes of rotation, the last pair of rollers used for rolling the profiles described in the examples 1 to 4.
  • the manufacturing method according to the invention uses a casting machine comprising a liquid metal feed nozzle (1), a casting wheel (2), which is rotated, provided with a peripheral groove, closed by a metal strip (3) driven by the wheel.
  • the machine can be a two-wheel machine and a caster like that shown in FIG. 1, the second wheel (4) being used for tensioning the ribbon, and the caster (5) being intended to hold the ribbon on the casting wheel. in the vicinity of the casting area.
  • the machine can also be a machine with three, four or five wheels.
  • the section of the blank (6) generally trapezoidal, varies according to the installations between 900 and more than 3000 mm 2 .
  • the number of rolling stands (7), each comprising a pair of rollers, is greater than two and preferably between 3 and 8. This number depends on the final section to be obtained, since the starting section is linked to the casting machine and therefore cannot be changed easily.
  • the reduction in section at each cage is, in general, between 10 and 40%.
  • the accuracy of the geometry improves with the number of cages, but conversely a high number of cages tends to harden the metal, making subsequent wire drawing more difficult.
  • the first cages use rollers with the same grooves as those used for the rolling of the section wire circular.
  • the penultimate cage may include, as the case may be, identical rollers on the former, either flat pebbles or pebbles similar in shape to the pebbles of the last cage, which in all cases have grooves delimiting a section corresponding to the desired final section.
  • the continuous casting process according to the invention makes it possible to produce profiles metallic; in particular of aluminum or copper alloys, of square section, rectangular, triangular, and more generally partially or totally polygonal, with good dimensional tolerances, of the order of 0.1 mm, and with good detachment of the metal from the last rolling stand.
  • These profiles can be used as is in many applications mechanical or electrical, or for the manufacture of welding wire. They can also be processed by drawing or drawing in one or more passes, in order to confer dimensions, tolerances on dimensions and shape, or characteristics special mechanics. Some of these products, obtained from wire rod circular section, are known. Using as a draft for wire drawing or drawing a wire rod with a partially or totally polygonal cross section depending on the invention considerably simplifies the manufacturing process since the shape of the cross section of the blank can be very close to that of the drawn product wish. In addition, lubricant leaks between the metal and the die are avoided. obtains when the geometries of the blank and the die are too different.
  • the process for manufacturing partially or totally drawn or drawn wire of section polygonal according to the invention is characterized in that one chooses, for a section data of the final profile, a rough section such as the number of drawing passes or wire drawing and annealing can be minimized.
  • a work hardening rate E (inlet section - outlet section) / outlet section close to the maximum value (around 80% for aluminum alloys) that can support the wire without developing unacceptable defects
  • the skilled person may define, for an aluminum alloy or copper wire, a range of manufacturing such as the number of drawing or drawing passes and the number of annealed are each reduced by at least a third. This gain is greater for sections which, at least locally, deviate the most from a circular section (sections in V or in T, very elongated flats and in particular those having a section such as the width to thickness ratio is greater than 2).
  • the exact number of drawing or drawing passes depends on the type of alloy used, as well as parameters of the drawing or drawing process. For alloys aluminum and square or triangular section profiles, we can most often limit stretching or drawing to a single pass with annealing, instead of at least two passes and two anneals starting from a circular blank. For profiles of rectangular section with a width to thickness ratio between 1 and 2, we may limit drawing or drawing to two passes and one annealing, and for reports width on thickness between 2 and 5, three passes and two anneals. The profiles of rectangular section with a width to thickness ratio greater than 4 are moreover, very difficult to draw by drawing from a section blank round, so that the method according to the invention allows a widening of the possibilities of manufacturing wire drawing.
  • the process according to the invention can be used for a wide variety of alloys of metal, especially aluminum alloys, including treatment alloys thermal (2000, 6000 and 7000 series), and copper alloys.
  • the metal was cast on a continuous casting machine of the 3-wheel type, in a grooved wheel leading to a trapezoidal shape blank, of greater width 41 mm and height 29 mm, ie a rough section of 1050 mm 2 .
  • the first 4 pairs of rollers have grooves defining a circular section, as is the case for continuous rolling of circular shaped profiles.
  • the fifth pair of rollers defines a flat air gap and the sixth defines a section square very close to that of the finished product.
  • the air gap between the pebbles of this sixth pair is 2 mm.
  • the radii of curvature of the section of the grooves of the rollers at the 4 vertices of the square are 3 mm.
  • the remains on the sides of the square perpendicular at the air gap of the rollers are 1 °.
  • the first 5 pairs of rollers have standard grooves similar to those used for rolling circular section profiles.
  • the sixth pair presents a 1.5 mm air gap and its grooves delimit a rectangle whose vertices have a radius of curvature of 2 mm and the sides perpendicular to the air gap a draft 1 °. No bonding of the profile is observed at the exit of the last cage and the tolerances on the dimensions of the profile are less than 0.1 mm.
  • An aluminum alloy 1370 profile is produced having a cross section in the general shape of a circular sector, delimited by a triangle at the bottom and an arc of a circle at the top, forming part of a rectangle 16.2 x 12.2 mm, and 150 mm section 2 .
  • the types of rollers, formats and speeds at the exit of each cage are indicated in Table 3 cage n ° rollers section format (mm x mm) speed (m / s) 1 standard 45 x 19.5 19.6 2 standard 27 x 26 30.1 3 standard 33 x 14.6 41.2 4 standard 18 x 18 64.2 5 sector 17.3 x 14.8 88.2 6 sector 12.2 x 16.2 114
  • the first 4 pairs of rollers have standard grooves similar to those of the rollers used for continuous rolling of circular section profiles.
  • the gorges of the fifth pair delimits a sector-shaped section
  • the sixth pair has grooves delimiting a section in the shape of a circular sector, with a radius of 3 mm curvature between the 2 flat parts, a draft of 1 ° on these flat parts and an air gap between the 2 rollers of 1.5 mm.
  • the upper part of the section, in the shape of an arc is carefully polished. No bonding of the profile is observed at the exit of the last cage and the tolerances on the dimensions of the profile are less than 0.1 mm.
  • a profile is produced, intended for electrical applications, of aluminum alloy 1370 of the form shown in FIG. 4 of section 490 mm 2 .
  • the types of rollers, formats and speeds at the exit of each cage are shown in Table 4: Cage No. rollers section format (mm x mm) speed (m / s) 1 Standard 45 x 20.5 18 2 Dish 28 x 19.5 28 3 of form 32

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)
  • Continuous Casting (AREA)
  • Laminated Bodies (AREA)

Claims (15)

  1. Verfahren zur Herstellung metallischer Profile mit teilweise oder ganz polygonalem Querschnitt durch kontinuierliches Stranggießen in einem Rillengießrad und kontinuierliches Walzen mittels einer Reihe von mindestens drei und vorzugsweise drei bis acht Walzenpaaren, welche umfangsseitig mit einer Rille versehen sind, wobei diese Walzen symmetrisch zum Profil angeordnet und abwechselnd horizontal und vertikal sind, dadurch gekennzeichnet, dass:
    die Rillen der ersten Walzenpaare mit denen solcher Walzen identisch sind, die für die Herstellung von Profilen mit rundem Querschnitt verwendet werden,
    das letzte Walzenpaar Rillen aufweist, die einen Querschnitt definieren, welcher im wesentlichen dem des gewünschten Profils entspricht,
    der durch die Rillen des letzten Walzenpaars gebildete Querschnitt an den Spitzen des Polygons Biegeradien zwischen 1 und 5 mm aufweist,
    die zum Walzspalt des letzten Walzenpaars nicht parallel verlaufenden Seiten des Polygons in Bezug auf die entsprechenden Seiten des Querschnitts des Endprofils eine Schräge von ½ bis 3° aufweisen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Profil einen quadratischen oder rechteckigen Querschnitt hat.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Profil einen rechteckigen Querschnitt mit einem Breite-Dicke-Verhältnis > 4 hat.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Profil einen dreieckigen Querschnitt hat.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Profil einen T- oder V-förmigen Querschnitt hat.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Walzen des vorletzten Walzenpaars eine flache Oberfläche haben.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sich daran mindestens eine Streck- oder Ziehstufe und eventuell mindestens eine Glühung anschließen.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Zahl der Ziehstufen und die Zahl der Glühungen im Vergleich zu einem Verfahren, das als Zieh- oder Streckvormaterial einen Walzdraht mit weitgehend rundem Querschnitt zur Herstellung eines ähnlichen Produkts verwenden würde, jeweils um mindestens ein Drittel reduziert sind.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Profil aus Aluminiumlegierung ist mit quadratischem oder dreieckigem Querschnitt und dass das Verfahren nur eine Streck- oder Ziehstufe und nur eine Glühung umfasst.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Aluminiumlegierung eine Legierung der Serie 5000 ist.
  11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Aluminiumlegierung eine 5756-Legierung ist.
  12. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Profil aus Aluminiumlegierung ist mit rechteckigem Querschnitt mit einem Verhältnis Breite zu Dicke von 2 bis 5 und dass das Verfahren höchstens drei Streck- oder Ziehstufen und zwei Glühungen umfasst.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass die Aluminiumlegierung eine Legierung der Serie 2000 ist.
  14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass die Aluminiumlegierung eine 2017-Legierung ist.
  15. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Profil aus Aluminiumlegierung ist mit rechteckigem Querschnitt mit einem Verhältnis Breite zu Dicke von 1 bis 2 und dass das Verfahren höchstens zwei Streck- oder Ziehstufen und eine Glühung umfasst.
EP99925059A 1998-06-10 1999-06-09 Verfahren zur herstellung von metallischen profilen mit polygonalem querschnitt durch kontinuierliches giessen mit hilfe eines rillengiessrades und kontinuierliches walzen Expired - Lifetime EP1085949B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9807478 1998-06-10
FR9807478A FR2779672B1 (fr) 1998-06-10 1998-06-10 Procede de fabrication de profiles metalliques de section polygonale par coulee continue sur roue a gorge et laminage continu
PCT/FR1999/001360 WO1999064176A1 (fr) 1998-06-10 1999-06-09 Procede de fabrication de profiles metalliques de section polygonale par coulee continue sur roue a gorge et laminage continu

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EP1085949A1 EP1085949A1 (de) 2001-03-28
EP1085949B1 true EP1085949B1 (de) 2001-12-05

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EP99925059A Expired - Lifetime EP1085949B1 (de) 1998-06-10 1999-06-09 Verfahren zur herstellung von metallischen profilen mit polygonalem querschnitt durch kontinuierliches giessen mit hilfe eines rillengiessrades und kontinuierliches walzen

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US (1) US6584669B1 (de)
EP (1) EP1085949B1 (de)
JP (1) JP2002517316A (de)
KR (1) KR20010052690A (de)
CN (1) CN1155446C (de)
AT (1) ATE209975T1 (de)
AU (1) AU4147999A (de)
BR (1) BR9911085A (de)
CA (1) CA2334851A1 (de)
DE (1) DE69900558T2 (de)
DK (1) DK1085949T3 (de)
ES (1) ES2167117T3 (de)
FR (1) FR2779672B1 (de)
MX (1) MXPA00012159A (de)
RU (1) RU2217250C2 (de)
UA (1) UA57618C2 (de)
WO (1) WO1999064176A1 (de)

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KR100343771B1 (ko) * 2000-04-27 2002-07-20 선남기 압축력과 인장력이 균일한 코일스프링의 제조방법.
CN100464939C (zh) * 2005-08-16 2009-03-04 吴乐瑞 改进的滑座制造方法及其制造装置
CN101224544B (zh) * 2008-01-30 2010-06-02 江阴华电新材料有限公司 高强、高导引线框架铜合金带材的生产方法
RU2465081C1 (ru) * 2011-06-24 2012-10-27 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Способ производства листовой холоднокатаной продукции из алюминия и его сплавов
DE102012013425A1 (de) * 2012-07-03 2014-01-09 Salzgitter Flachstahl Gmbh Kontinuierlich arbeitende Bandgieß- und Walzanlage
CN104325099B (zh) * 2014-11-25 2017-06-27 四川金岳新型材料有限公司 铝合金窄板带连续铸轧装置及方法
ES2899646T3 (es) 2017-05-19 2022-03-14 Iq Power Licensing Ag Dispositivo de colada de portaelectrodos para baterías de plomo-ácido

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DE213605C (de)
FR1433460A (fr) * 1965-02-16 1966-04-01 Procédé pour l'obtention de profilés métalliques
US3517537A (en) * 1967-09-15 1970-06-30 Southwire Co Method of hot-forming continuously cast aluminum
FR2048693A5 (de) 1969-05-27 1971-03-19 Properzi Ilario
BE790448A (fr) 1971-01-13 1973-02-15 Southwire Co Dispositif de refroidissement pour train de
US3729973A (en) * 1971-04-02 1973-05-01 Morgan Construction Co Roll passes for rolling a bar of continuously cast non-ferrous metal and the method improving the metal structure
US3996780A (en) * 1975-07-02 1976-12-14 Dravo Corporation Method and apparatus for making an improved serrated grating bar
US4287934A (en) * 1977-12-14 1981-09-08 Southwire Company Continuous casting mold
DE2917784A1 (de) * 1979-05-03 1980-11-13 Krupp Gmbh Verfahren zum herstellen von flachmaterial aus aluminium, kupfer, stahl oder aus legierungen dieser werkstoffe mittels einer kontinuierlich arbeitenden giessmaschine und vorrichtung zur durchfuehrung des verfahrens
DD213605A1 (de) * 1983-02-11 1984-09-19 Freiberg Bergakademie Kalibrierungen zum walzen von feinstahl und draht mit regelmaessigem achteckquerschnitt

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CN1155446C (zh) 2004-06-30
ES2167117T3 (es) 2002-05-01
DE69900558D1 (de) 2002-01-17
FR2779672B1 (fr) 2000-07-28
DK1085949T3 (da) 2002-07-08
ATE209975T1 (de) 2001-12-15
AU4147999A (en) 1999-12-30
MXPA00012159A (es) 2002-04-17
JP2002517316A (ja) 2002-06-18
CA2334851A1 (fr) 1999-12-16
US6584669B1 (en) 2003-07-01
CN1309591A (zh) 2001-08-22
EP1085949A1 (de) 2001-03-28
DE69900558T2 (de) 2002-07-18
KR20010052690A (ko) 2001-06-25
FR2779672A1 (fr) 1999-12-17
WO1999064176A1 (fr) 1999-12-16
UA57618C2 (uk) 2003-06-16
RU2217250C2 (ru) 2003-11-27
BR9911085A (pt) 2001-02-20

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