EP1109942B1 - Method for producing cold-rolled bands or sheets - Google Patents

Method for producing cold-rolled bands or sheets Download PDF

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Publication number
EP1109942B1
EP1109942B1 EP99968685A EP99968685A EP1109942B1 EP 1109942 B1 EP1109942 B1 EP 1109942B1 EP 99968685 A EP99968685 A EP 99968685A EP 99968685 A EP99968685 A EP 99968685A EP 1109942 B1 EP1109942 B1 EP 1109942B1
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European Patent Office
Prior art keywords
cold
rolled
steels
micro
rolling
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Expired - Lifetime
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EP99968685A
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German (de)
French (fr)
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EP1109942A1 (en
Inventor
Bernhard Engl
Klaus Dieter Horn
Klaus Dieter Schmidt
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ThyssenKrupp Steel Europe AG
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ThyssenKrupp Stahl AG
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    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C21D8/0215—Rapid solidification; Thin strip casting
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling

Definitions

  • the invention relates to a method for generating cold rolled strips or sheets of low alloy Steel with max. 0.2% C, P, Al, Ti, V, Nb, S, B and max. 1% Si and Mn, balance iron and unavoidable impurities.
  • the steel is in known way after melting into slabs, Thin slabs or ribbon, usually in Continuous casting process, poured and then hot rolled, cold rolled and annealed to recrystallize.
  • the amount of for complete recrystallization of the cold rolled strip or sheet required Annealing temperature can be in the preliminary stages of Steel strip production can be influenced. So it is known that one about a high hot strip reel temperature and one high degree of cold rolling the recrystallization temperature can lower.
  • the invention is based on the object Manufacturing effort and the associated Manufacturing cost to produce a complete recrystallized cold rolled strip or sheet Reduce.
  • JP-A-05 239 554 and G1 238 919 relate to the production of a steel strip with a similar composition as according to the invention, but without a boron content, with parameters of the temperatures of the warm rolling, reeling and recrystallization annealing, which overlap the parmeters according to the invention.
  • the degree of cold rolling is, however, higher than that according to the invention.
  • the invention is the surprising finding based on that a lowered hot rolling final temperature and complete a low reel temperature Recrystallization of the cold rolled strip or sheet with an almost independent of the degree of cold rolling relatively low temperature can take place.
  • a low temperature for recrystallization annealing saves energy and costs.
  • the steels contain in addition to those specified above Alloy contents up to 0.01% of nitrogen and those for Nitrogen removal required amount of boron (> 0.78 x N), In addition, small amounts are different Alloy elements which the Recrystallization conditions are not disadvantageous influence, also permissible.
  • the hot rolling end temperature should preferably be about 50 ° C below Ar 3 and the coiling temperature preferably in the range of 300 to 600 ° C.
  • the coiling temperature preferably in the range of 300 to 600 ° C.
  • Table 1 shows the chemical compositions of four deep-drawing steels A to D are specified.
  • Figures 1 to 5 are the hot rolling and annealing conditions, respectively contain.

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  • 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)
  • Lubricants (AREA)
  • Metal Rolling (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

The present invention concerns a method for the production of cold-rolled bands or sheets from low-alloy steel with a maximum of 0.2% C, Al, Ti, V, Nb respectively and a maximum of 1% Si and Mn respectively, in addition to a portion of boron required for N binding (>0,78xN), the remainder being constituted by iron and unavoidable impurities, wherein said steel is cast after melting to slabs, thin slabs or a band, which are hot-rolled at a starting temperature above 1100° C. and at a final temperature below Ar3 and wherein the hot band is then drawn and cold-rolled at a temperature below 650° C., whereupon the cold band is annealed independently of the degree of cold-rolling at a low temperature that could possibly vary depending on the composition of the steel and ranging from 520 to 780° C. during a period of time that is sufficiently long to allow for complete recrystallization. The method disclosed makes it possible to simplify manufacturing and to lower production costs associated with the manufacture of a completely recrystallized cold-rolled band or sheet.

Description

Die Erfindung betrifft ein Verfahren zur Erzeugung von kaltgewalzten Bändern oder Blechen aus niedriglegiertem Stahl mit jeweils max. 0,2 % C, P, Al, Ti, V, Nb, S, B und jeweils max. 1 % Si und Mn, Rest Eisen und unvermeidbaren Verunreinigungen. Der Stahl wird in bekannter Weise nach dem Erschmelzen zu Brammen, Dünnbrammen oder Band, in der Regel im Stranggußverfahren, abgegossen und danach warmgewalzt, kaltgewalzt und rekristallisierend geglüht.The invention relates to a method for generating cold rolled strips or sheets of low alloy Steel with max. 0.2% C, P, Al, Ti, V, Nb, S, B and max. 1% Si and Mn, balance iron and unavoidable impurities. The steel is in known way after melting into slabs, Thin slabs or ribbon, usually in Continuous casting process, poured and then hot rolled, cold rolled and annealed to recrystallize.

Die Höhe der für eine vollständige Rekristallisation des kaltgewalzten Bandes oder Bleches erforderliche Glühtemperatur kann in den Vorstufen der Bandstahlerzeugung beeinflußt werden. So ist bekannt, daß man über eine hohe Warmband-Haspeltemperatur sowie einen hohen Kaltwalzgrad die Rekristallisationstemperatur absenken kann.The amount of for complete recrystallization of the cold rolled strip or sheet required Annealing temperature can be in the preliminary stages of Steel strip production can be influenced. So it is known that one about a high hot strip reel temperature and one high degree of cold rolling the recrystallization temperature can lower.

Der Erfindung liegt nun die Aufgabe zugrunde, den Fertigungsaufwand und die damit verbundenen Herstellungskosten für die Erzeugung eines vollständig rekristallisierten kaltgewalzten Bandes oder Blechs zu vermindern.The invention is based on the object Manufacturing effort and the associated Manufacturing cost to produce a complete recrystallized cold rolled strip or sheet Reduce.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung bei dem Verfahren nach Anspruch 1 vorgeschlagen, die Brammen oder Bänder mit einer Anfangstemperatur oberhalb 1100 °C und einer unter Ar3 liegenden Endtemperatur warmzuzwalzen, das Warmband bei einer unter 650 °C liegenden Temperatur zu haspeln und nach dem anschließenden Kaltwalzen mit einem kaltwalrgrad von höastens 50% das Kaltband bei einer vom Kaltwalzgrad nahezu unabhängigen je nach Stahlzusammensetzung und Glühe jeweils möglichst niedrigen Temperatur im Bereich von 500 bis 750 °C für eine ausreichend lange Dauer zur vollständigen Rekristallisation zu glühen.To achieve this object, it is proposed according to the invention in the method according to claim 1, hot rolling the slabs or strips with an initial temperature above 1100 ° C and a final temperature below Ar 3 , reeling the hot strip at a temperature below 650 ° C and after Subsequent cold rolling with a cold rolling degree of 50% or less, annealing the cold strip at a temperature as low as possible, depending on the steel composition and annealing, which is almost independent of the cold rolling degree, in the range from 500 to 750 ° C for a sufficiently long period for complete recrystallization.

JP-A-05 239 554 und G1 238 919 betreffen die Herstellung eines stahlbandes mit ähnlicher Zusammensetzung wie erfindungsgemäß, jedoch ohne einen Borgehalt, mit Parametern der Temperaturen des Warm walzens, Haspelns und Rekristallisations glühens, welche die erfindungsgemäßen Parmeters überlappen. Der kaltwalzgrad ist jedoch höher als erfindungsgemäß.JP-A-05 239 554 and G1 238 919 relate to the production of a steel strip with a similar composition as according to the invention, but without a boron content, with parameters of the temperatures of the warm rolling, reeling and recrystallization annealing, which overlap the parmeters according to the invention. The degree of cold rolling is, however, higher than that according to the invention.

Der Erfindung liegt die überraschende Feststellung zugrunde, daß über eine abgesenkte Warmwalz-Endtemperatur und eine niedrige Haspeltemperatur vollständige Rekristallisation des kaltgewalzten Bandes oder Bleches bei einer vom Kaltwalzgrad nahezu unabhängigen verhältnismäßig niedrigen Temperatur erfolgen kann. Eine niedrige Temperatur für die Rekristallisationsglühung spart Energie und Kosten.The invention is the surprising finding based on that a lowered hot rolling final temperature and complete a low reel temperature Recrystallization of the cold rolled strip or sheet with an almost independent of the degree of cold rolling relatively low temperature can take place. A low temperature for recrystallization annealing saves energy and costs.

Die Stähle enthalten neben den vorstehend angegebenen Legierungsgehalten bis 0,01 % an Stickstoff und die zur Stickstoffabbindung benötigte Menge an Bor (> 0,78 x N), Darüber hinaus sind geringe Mengen anderer Legierungselemente, welche die Rekristallisationsbedingungen nicht nachteilig beeinflussen, ebenfalls zulässig.The steels contain in addition to those specified above Alloy contents up to 0.01% of nitrogen and those for Nitrogen removal required amount of boron (> 0.78 x N), In addition, small amounts are different Alloy elements which the Recrystallization conditions are not disadvantageous influence, also permissible.

Die Warmwalz-Endtemperatur sollte möglichst etwa 50 °C unterhalb von Ar3 liegen und die Haspeltemperatur bevorzugt im Bereich von 300 bis 600 °C. IF-Stähle mit niedrigem Kohlenstoffgehalt bis 0,01 % bzw. mit Ti, V, Nb mikrolegierte Stähle können im Temperaturbereich von 600 bis 780 °C vollständig rekristallisierend geglüht werden, während nicht mikrolegierte Stähle bei noch niedrigerer Temperatur im Bereich von 500 bis 680 °C, weitestgehend unabhängig vom Kaltwalzgrad, vollständig rekristallisierend geglüht werden können.The hot rolling end temperature should preferably be about 50 ° C below Ar 3 and the coiling temperature preferably in the range of 300 to 600 ° C. IF steels with a low carbon content of up to 0.01% or steels microalloyed with Ti, V, Nb can be completely recrystallized annealed in the temperature range from 600 to 780 ° C, while non-microalloyed steels can be annealed at even lower temperatures in the range from 500 to 680 ° C, largely independent of the degree of cold rolling, can be completely recrystallized annealed.

Anhand von fünf Beispielen wird die Erfindung näher erläutert.The invention is illustrated by five examples explained.

In Tabelle 1 sind die chemischen Zusammensetzungen von vier Tiefziehstählen A bis D angegeben. In den Figuren 1 bis 5 sind jeweils die Warmwalz- und Glühbedingungen enthalten.Table 1 shows the chemical compositions of four deep-drawing steels A to D are specified. In Figures 1 to 5 are the hot rolling and annealing conditions, respectively contain.

Aus den Kurvenverläufen ist ersichtlich, wie durch die erfindungsgemäße Kombination von niedriger Warmwalz-Endtemperatur und niedriger Haspeltemperatur, kaltgewalztes Band oder Blech, Beispiele A4 bis C4, die Rekristallisationstemperatur sowohl in der Durchlaufglühe (Fig. 1 und 2) als auch in der Haubenglühe (Fig. 3 bis 5) bei niedrigem Kaltwalzgrad von 30 bis 50 % stark abgesenkt werden kann, gegenüber gleich zusammengesetztem Material, bei dessen Verarbeitung aber eine höhere Warmwalz-Endtemperatur und Haspeltemperatur angewendet wurde.

Figure 00040001
From the curves, it can be seen how the combination of low hot rolling final temperature and low coiling temperature, cold-rolled strip or sheet, examples A4 to C4, the recrystallization temperature in both the continuous annealing (Fig. 1 and 2) and the bell annealing (Fig 3 to 5) can be greatly reduced at a low degree of cold rolling of 30 to 50% compared to material of the same composition, but in the processing of which a higher hot rolling end temperature and coiling temperature was used.
Figure 00040001

Claims (7)

  1. Method for producing cold-rolled strips or sheets, in which a low-alloyed steel with a respective max. 0.2 % of C, Al, Ti, V, Nb and a respective max. 1 % Si and Mn, and the quantity of boron > 0.78 x N required for N-setting, remainder iron and unavoidable contaminants, are melted and cast into slabs, thin slabs or strips, wherein the slabs, thin slabs or strips are hot-rolled at an initial temperature exceeding 1,100 °C and a final temperature lying under Ar3, and the obtained hot strip is then coiled at a temperature of less than 650 °C and cold-rolled at a cold-rolling ratio of at most 50 %, whereupon the obtained cold strip is annealed for a time sufficient for complete recrystallization at a temperature ranging from 520 to 780 °C which is independent of the cold rolling level and as low as possible depending on steel composition.
  2. Method according to claim 1, characterized in that cold rolling takes place at cold-rolling ratios of between 30 % and 50 %.
  3. Method according to claim 1 or 2, characterized in that during cold rolling the strip is subjected to one or more intermediate annealings between the cold-rolling steps.
  4. Method according to one of claims 1 to 3, applied to steels with < 0.01 % C and free of micro-alloys, and to steels with any C content and micro-alloy elements, in which recrystallization annealing takes place in a continuous annealing installation at a temperature ranging from 700 to 780 °C.
  5. Method according to one of claims 1 to 3, applied to steels with more than 0.1 % C and free of micro-alloys, in which recrystallization annealing takes place in a continuous annealing installation at a temperature ranging from 600 to 680 °C.
  6. Method according to one of claims 1 to 3, applied to steels with < 0.01 % C and free of micro-alloys, and to steels with any C content and micro-alloy elements, in which recrystallization annealing takes place in a batch annealing installation a temperature ranging from 600 to 680 °C.
  7. Method according to one of claims 1 to 3, applied to steels with more than 0.1 % C and free of micro-alloys, in which recrystallization annealing takes place in a batch annealing installation at a temperature ranging from 520 to 600 °C.
EP99968685A 1998-09-08 1999-09-06 Method for producing cold-rolled bands or sheets Expired - Lifetime EP1109942B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19840788 1998-09-08
DE19840788A DE19840788C2 (en) 1998-09-08 1998-09-08 Process for producing cold-rolled strips or sheets
PCT/EP1999/006533 WO2000014288A1 (en) 1998-09-08 1999-09-06 Method for producing cold-rolled bands or sheets

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EP1109942A1 EP1109942A1 (en) 2001-06-27
EP1109942B1 true EP1109942B1 (en) 2003-06-25

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Country Status (19)

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US (1) US6582537B1 (en)
EP (1) EP1109942B1 (en)
JP (1) JP2002524657A (en)
KR (1) KR100613472B1 (en)
CN (1) CN1103824C (en)
AT (1) ATE243769T1 (en)
AU (1) AU749783B2 (en)
BR (1) BR9913530A (en)
CA (1) CA2342934A1 (en)
CZ (1) CZ300683B6 (en)
DE (2) DE19840788C2 (en)
ES (1) ES2201830T3 (en)
HU (1) HUP0104020A3 (en)
PL (1) PL191884B1 (en)
RU (1) RU2222610C2 (en)
SK (1) SK286577B6 (en)
TR (1) TR200100654T2 (en)
WO (1) WO2000014288A1 (en)
ZA (1) ZA200101676B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10153234A1 (en) * 2001-10-31 2003-05-22 Thyssenkrupp Stahl Ag Hot-rolled steel strip intended for the production of non-grain-oriented electrical sheet and method for its production
US8333923B2 (en) * 2007-02-28 2012-12-18 Caterpillar Inc. High strength gray cast iron
US8709178B2 (en) * 2009-02-09 2014-04-29 Nippon Steel & Sumitomo Metal Corporation Titanium material for hot rolling and method of producing the same
RU2699480C1 (en) * 2018-12-14 2019-09-05 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Method of producing cold-rolled products

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US3857740A (en) * 1972-07-11 1974-12-31 Nippon Steel Corp Precipitation hardening high strength cold rolled steel sheet and method for producing same
JPS5338690B2 (en) * 1972-11-20 1978-10-17
JPS6045689B2 (en) * 1982-02-19 1985-10-11 川崎製鉄株式会社 Method for manufacturing cold rolled steel sheet with excellent press formability
US4587371A (en) * 1984-08-27 1986-05-06 Cosden Technology, Inc. Hydrocarbon conversion of sulfur contaminated feed stock
JPS61238919A (en) 1985-04-15 1986-10-24 Kawasaki Steel Corp Manufacture of cold rolled deep drawing steel sheet having low anisotropy in plane
DE3528782A1 (en) 1985-08-10 1987-02-19 Hoesch Stahl Ag METHOD FOR PRODUCING AN AGING-RESISTANT STRIP STEEL WITH HIGH COLD FORMABILITY
JPS62139822A (en) 1985-12-11 1987-06-23 Kobe Steel Ltd Production of cold rolled steel sheet for deep drawing having excellent uniformity of material quality
DE3803064C2 (en) * 1988-01-29 1995-04-20 Preussag Stahl Ag Cold rolled sheet or strip and process for its manufacture
JPH05239554A (en) 1992-02-28 1993-09-17 Kobe Steel Ltd Production of cold rolled steel sheet for extra deep drawing having baking hardenability

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RU2222610C2 (en) 2004-01-27
SK2852001A3 (en) 2002-06-04
DE19840788A1 (en) 2000-03-16
PL346523A1 (en) 2002-02-11
CZ2001735A3 (en) 2002-03-13
AU749783B2 (en) 2002-07-04
US6582537B1 (en) 2003-06-24
ATE243769T1 (en) 2003-07-15
WO2000014288A1 (en) 2000-03-16
KR100613472B1 (en) 2006-08-18
PL191884B1 (en) 2006-07-31
HUP0104020A3 (en) 2002-03-28
DE59906117D1 (en) 2003-07-31
BR9913530A (en) 2001-06-05
ZA200101676B (en) 2002-06-28
JP2002524657A (en) 2002-08-06
CZ300683B6 (en) 2009-07-15
DE19840788C2 (en) 2000-10-05
AU5973599A (en) 2000-03-27
CN1103824C (en) 2003-03-26
EP1109942A1 (en) 2001-06-27
CN1317055A (en) 2001-10-10
SK286577B6 (en) 2009-01-07
HUP0104020A2 (en) 2002-02-28
CA2342934A1 (en) 2000-03-16
TR200100654T2 (en) 2001-07-23
KR20010074992A (en) 2001-08-09
ES2201830T3 (en) 2004-03-16

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