EP1430161A2 - High-strength duplex/triplex steel for lightweight construction and use thereof - Google Patents

High-strength duplex/triplex steel for lightweight construction and use thereof

Info

Publication number
EP1430161A2
EP1430161A2 EP02800111A EP02800111A EP1430161A2 EP 1430161 A2 EP1430161 A2 EP 1430161A2 EP 02800111 A EP02800111 A EP 02800111A EP 02800111 A EP02800111 A EP 02800111A EP 1430161 A2 EP1430161 A2 EP 1430161A2
Authority
EP
European Patent Office
Prior art keywords
lightweight steel
strength
steel according
steel
triplex
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.)
Granted
Application number
EP02800111A
Other languages
German (de)
French (fr)
Other versions
EP1430161B1 (en
Inventor
Konrad Eipper
Georg Frommeyer
Wolfgang Fussnegger
Arndt Gerick
Wolfgang KLEINEKATHÖFER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE10231125A external-priority patent/DE10231125A1/en
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1430161A2 publication Critical patent/EP1430161A2/en
Application granted granted Critical
Publication of EP1430161B1 publication Critical patent/EP1430161B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • 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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys

Definitions

  • the invention relates to a high-strength and very deep-drawable duplex or triplex lightweight steel and its use.
  • High-strength steel is developed for the automotive industry, construction industry and in aerospace applications with different properties and is already used in production.
  • the desire to reduce the weight of the vehicle through new materials is becoming increasingly important.
  • the aim is to manufacture lighter steel alloys, which otherwise maintain or further improve the previous favorable properties.
  • high-strength lightweight steels which have a higher proportion of aluminum, chromium and nickel and manganese and as a result which have a lower density than iron.
  • the steel alloy is characterized by good corrosion and stress corrosion cracking resistance as well as high strength.
  • Such steels have aluminum contents of up to 10% by weight.
  • the austenitic or austenitic / ferritic lightweight steel has a composition with 7-27% by weight Mn, 1-10% by weight Al, less than 10% by weight Cr, less than 10% by weight Ni, more than 0.7-4% by weight of Si, less than 3% by weight of Cu, less than 0.5% by weight of C and a remaining composition of iron and melting-related impurities.
  • the other alloy components can consist of small amounts of nitrogen, niobium, titanium, vanadium and phosphorus.
  • the known lightweight steels listed above have important advantageous properties for use in the mentioned technology areas, but these are associated with significant disadvantages. Further weight savings, for example in the automotive industry, can only be achieved with the known steels by further reducing the sheet thickness or by additional design measures. Well-formable, ie deep-draw and stretch-drawable, cold-rollable and recrystallized annealed deep-drawing steels with a higher aluminum content, such as are required in particular for use in automotive engineering, are not known in this form due to the still too high specific density from the prior art.
  • the object of the invention is to create a highly stable lightweight steel which is easy to form, in particular deeply and extensible, the density of which is below the specific density of previously known steels.
  • the solution according to the invention relates to a high-strength ⁇ / ⁇ -
  • the proportions of the elements Mg, Ga and Be, if present, are each greater than 0.3%.
  • the elements N, Nb, V and possibly Ti with the following proportions are preferably used as further alloy elements:
  • the lightweight steel according to the invention is formed from a multi-phase structure in the case of duplex steel from ⁇ -ferrite and ⁇ -austenite mixed crystals. In the case of triplex steel, an artensitic ⁇ phase and / or K phase is added to the first two phases.
  • the specific weight of the steel according to the invention is reduced to low values by the high proportions of the light alloy elements Al, Si, C and Mn and at least one of the elements Mg, Ga, Be and possibly Ti.
  • a density below 7 g / cm 3 is achieved with both alloys, which is significantly reduced by up to 15% compared to conventional steels with values between 7.3 and 7.5 g / cm 3 .
  • the solution according to the invention also has a further reduction in density compared to the lightweight steels known from the literature with up to 8% aluminum content.
  • the lightweight steel according to the invention achieves one through the element Mg, insofar as it is present in the alloy further lowering of its density due to the very low specific weight of Mg.
  • Be insofar as it is present in the alloy, an additional increase in strength being achieved here, which can be achieved while maintaining the ductility.
  • the element Ti is present in the alloy, a further increase in strength is achieved through grain refinement and mixed crystal hardening.
  • the element Ga if present in the alloy, also serves to increase strength and hardness. In addition, it increases the castability of the alloy, since the proportion of Ga makes it more liquid at comparable temperature conditions.
  • duplex or triplex lightweight steel according to the invention is characterized in the cold-rolled and recrystallized state by a fine-grained two- or three-phase structure with an equiaxial i.e. isotropic morphology of the ⁇ -ferrite, ⁇ -austenite or ⁇ -martensite grains.
  • the respective fine-grained two-phase or three-phase structure increases the energy absorption - the dissipative energy - of this steel when subjected to stress at high expansion speeds, such as occurs due to impact loads or in the event of a crash.
  • the lightweight steel is characterized by yield stresses of over 400 MPa. Due to a high degree of solidification due to strong interaction of the dislocations of the coexisting / ⁇ - or ⁇ / ⁇ / ⁇ (K) phases, tensile strengths on the hot strip of up to 1000 MPa are achieved and uniform strains up to 40% and maximum strains up to 50%.
  • the recrystallizing annealed cold strip has strengths in the range of 900 MPa with maximum elongations of 70%.
  • the significantly lower density than conventional steels is particularly advantageous.
  • the lightweight steel according to the invention also has a previously unknown density reduction compared to the lightweight steel with aluminum components known from the prior art.
  • Another advantage of the solution according to the invention is that, despite its high strength, the material has very good formability. These properties had previously only been achieved with high-alloy stainless steel. Particularly noteworthy is its pourability during processing, which, as already mentioned, is further improved in the presence of Ga.
  • the ⁇ / ⁇ duplex or ⁇ / ⁇ / ⁇ (K) triplex lightweight steel according to the invention thus results in a further improvement in the combination of previously unknown advantageous properties.
  • the lightweight steel Due to the high proportion of alloy components with a specific weight below the specific weight of iron and previously known lightweight steels, one for the Auto industry achieved advantageous weight reduction while maintaining the previous design. Furthermore, the lightweight steel has excellent ductility, high strength and an extremely high hardening rate. The property of a high loading speed in the crash behavior in the event of an accident should be emphasized, so that this steel alloy is particularly suitable for motor vehicle construction. Furthermore, there is an increased resistance to corrosion and, in particular, stress crack corrosion, so that this steel alloy is also suitable for use in other technological areas, for example in construction.
  • the lightweight steels according to the invention can be used excellently, in particular as prestressed concrete steels and reinforcing bars (steel) or guard rails and sheet piling.
  • the corrosion resistance can further be improved by chemical, electrochemical, organic, non-metallic or metallic coatings.
  • a protective cover layer can be achieved by enriching and / or coating the surface with aluminum.
  • the deep- and stretch-drawable aluminum-containing steel is melted in the manufacturing process, cast in the continuous casting process, rolled in the temperature range above the recrystallization temperature or preferably by casting rolling, thin strip casting, cast as a strip close to the final dimension.
  • the steel can either be directly processed as hot strip or can be cold rolled after hot rolling.
  • the lightweight steel according to the invention is particularly suitable for component production for body-in-white components / body, integral beams, chassis structures and space frames.
  • Other lightweight components in motor vehicles are steering, axles and axle components, add-on parts, seat rails, fastening parts and systems for passive safety, wheel suspensions, drive train and fuel tanks.
  • the area of application also extends to rail and water vehicles as well as in aerospace, there preferably in thin-walled components relevant to rigidity.
  • the material is also suitable for conveyor systems, conveyor belts and in metallurgy.

Abstract

The invention concerns a steel for lightweight construction, consisting of a multiphase structure. In the case of a duplex steel, it consists of mixed ferrite (alpha) and austenite (gamma) crystals. In the case of a triplex steel, it comprises, additioally to said two phases, martensitic (epsilon) and/or (kappa) phases. The volumetric weight of the inventive steel is low as a result of the high proportion of light alloys A1, Si Mn, Mg, Ga and Be. The inventive alloys have a volumetric weight of less than 7b/cm<SUP>3</SUP>.

Description

Hochfester Duplex-/Triplex-Leichtbaustahl und seine VerwendungHigh-strength duplex / triplex lightweight steel and its use
Die Erfindung betrifft einen hochfesten und sehr gut tiefzieh- fähigen Duplex- bzw. Triplex-Leichtbaustahl und seine Verwendung.The invention relates to a high-strength and very deep-drawable duplex or triplex lightweight steel and its use.
Hochfester Stahl wird für die Fahrzeugindustrie, Bauindustrie sowie in Luft- und Raumfahrtanwendungen mit unterschiedlichen Eigenschaften entwickelt und bereits in der Produktion eingesetzt. Hierbei steht insbesondere im Einsatz in der Automobilindustrie zunehmend der Wunsch im Vordergrund, durch neue Materialien eine Gewichtsreduzierung des Fahrzeuges vorzunehmen. Ziel dabei ist die Herstellung von leichteren Stahllegierungen, welche ansonsten die bisherigen günstigen Eigenschaften beibehalten bzw. weiter verbessern.High-strength steel is developed for the automotive industry, construction industry and in aerospace applications with different properties and is already used in production. In the automotive industry in particular, the desire to reduce the weight of the vehicle through new materials is becoming increasingly important. The aim is to manufacture lighter steel alloys, which otherwise maintain or further improve the previous favorable properties.
Aus der DE 43 03 316 sind Stähle mit 13-16 Gew.-% AI und zum Teil höheren Gehalten weiterer Legierungselemente, wie Cr, Nb, Ta, Si, B, Ti, für oxidations- und korrosionsbeständige Bauteile bekannt. Derartige Legierungen zeichnen sich bei Temperaturen oberhalb 700 °C durch eine hohe Oxidations- und Korrosionsbeständigkeit aus und werden in Bauteilen verwendet, die zwar bei hohen Temperaturen einsetzbar sind, jedoch bevorzugt nur bei geringer mechanischer Belastung oxidierenden und korrodierenden Bedingungen ausgesetzt werden.From DE 43 03 316 steels with 13-16 wt .-% Al and sometimes higher contents of other alloying elements, such as Cr, Nb, Ta, Si, B, Ti, for oxidation and corrosion-resistant components are known. Alloys of this type are distinguished by a high resistance to oxidation and corrosion at temperatures above 700 ° C. and are used in components which can be used at high temperatures, but are preferably only exposed to oxidizing and corrosive conditions at low mechanical stress.
Weiterhin sind beispielsweise aus der DE 199 00 199 hochfeste Leichtbaustähle bekannt, welche einen höheren Anteil an Aluminium, Chrom und Nickel sowie Mangan aufweisen und infolge dessen eine geringere Dichte als Eisen besitzen. Erwartungsgemäß zeichnet sich die Stahllegierung durch gute Korrosionsund Spannungsrißkorrosionsbeständigkeit sowie hoher Festigkeit aus. Derartige Stähle weisen Aluminiumgehalte bis 10 Gew.-% auf.Furthermore, from DE 199 00 199 high-strength lightweight steels are known which have a higher proportion of aluminum, chromium and nickel and manganese and as a result which have a lower density than iron. As expected, the steel alloy is characterized by good corrosion and stress corrosion cracking resistance as well as high strength. Such steels have aluminum contents of up to 10% by weight.
Beispielsweise weist der austenitische bzw. austenitisch/ ferritische Leichtbaustahl eine Zusammensetzung auf mit 7-27 Gew.-% Mn, 1-10 Gew.-% AI, weniger als 10 Gew.-% Cr, weniger als 10 Gew.-% Ni, mehr als 0,7-4 Gew.- % Si, weniger als 3 Gew.-% Cu, weniger als 0,5 Gew.-% C und einer restlichen Zusammensetzung aus Eisen und erschmelzungsbedingten Verunreinigungen. Die weiteren Legierungsbestandteile können aus geringen Anteilen Stickstoff, Niob, Titan, Vanadium und Phosphor bestehen.For example, the austenitic or austenitic / ferritic lightweight steel has a composition with 7-27% by weight Mn, 1-10% by weight Al, less than 10% by weight Cr, less than 10% by weight Ni, more than 0.7-4% by weight of Si, less than 3% by weight of Cu, less than 0.5% by weight of C and a remaining composition of iron and melting-related impurities. The other alloy components can consist of small amounts of nitrogen, niobium, titanium, vanadium and phosphorus.
Aus der DE 12 62 613 Bl ist außerdem die Verwendung von Leichtbaustählen für Flugzeugbauteile und -motoren sowie Geschosse und dergleichen bekannt, welche mit 4 bis 20% AI, 18 bis 40% Mn und 0,15 bis 2% C hohe Anteile an leichten Legierungsbestandteilen aufweisen. Dazu können ggf. noch 0 bis 3% Si und 0 bis 4% Nb kommen.From DE 12 62 613 Bl the use of lightweight steels for aircraft components and engines as well as projectiles and the like is known, which with 4 to 20% Al, 18 to 40% Mn and 0.15 to 2% C high proportions of light alloy components exhibit. 0 to 3% Si and 0 to 4% Nb may also be added.
Auch bekannt ist aus der DE 197 27 759 die Verwendung eines kaltumformbaren, insbesondere gut tiefziehfähigen, auste- nitischen Leichtbaustahls, der eine Zugfestigkeit bis 1100 MPa sowie TRIP- und/oder TWIP-Eigenschaften aufweist. In derIt is also known from DE 197 27 759 to use a cold-formable, in particular deep-drawable, austenitic lightweight steel which has a tensile strength of up to 1100 MPa and TRIP and / or TWIP properties. In the
Zusammensetzung mit 1 bis 6 % Si, 1 bis 8% AI, wobei (Al+Si)< 12 %, 10 bis 30 % Mn, Rest im wesentlichen Eisen einschließlich üblicher Stahlbegleitelemente dient er als Werkstoff für versteifende Karosserieblechteile .Composition with 1 to 6% Si, 1 to 8% Al, whereby (Al + Si) <12%, 10 to 30% Mn, rest essentially iron including common steel accompanying elements, it serves as a material for stiffening body panels.
Die vorstehend aufgeführten bekannten Leichtbaustähle weisen zwar wichtige vorteilhafte Eigenschaften für den Einsatz in den genannten Technologiegebieten auf, dennoch sind diese mit wesentlichen Nachteilen behaftet. Weitere Gewichtseinsparungen, beispielsweise in der Autoindustrie, lassen sich mit den bekannten Stählen nur durch eine weitere Reduzierung der Blechdicke oder durch zusätzliche konstruktive Maßnahmen erreichen. Gut umformbare, d. h. tief- und streckziehfähige, kaltwalzbare und rekristallisierend geglühte Tiefziehstähle mit höherem Aluminiumgehalt, wie sie insbesondere für die Anwendung in der Automobiltechnik benötigt werden, sind aufgrund einer immer noch zu hohen spezifischen Dichte aus dem Stand der Technik in dieser Form nicht bekannt.The known lightweight steels listed above have important advantageous properties for use in the mentioned technology areas, but these are associated with significant disadvantages. Further weight savings, for example in the automotive industry, can only be achieved with the known steels by further reducing the sheet thickness or by additional design measures. Well-formable, ie deep-draw and stretch-drawable, cold-rollable and recrystallized annealed deep-drawing steels with a higher aluminum content, such as are required in particular for use in automotive engineering, are not known in this form due to the still too high specific density from the prior art.
Der Erfindung liegt die Aufgabe zugrunde, einen gut kaltu form- baren, insbesondere gut tief- und streckziehfähigen hochfesten Leichtbaustahl zu schaffen, dessen Dichte unter der spezifischen Dichte bisher bekannter Stähle liegt.The object of the invention is to create a highly stable lightweight steel which is easy to form, in particular deeply and extensible, the density of which is below the specific density of previously known steels.
Die Erfindung wird durch den Gegenstand des Anspruchs 1 wiedergegeben. Die weiteren Ansprüche enthalten vorteilhafte Aus- und Weiterbildungen der Erfindung.The invention is represented by the subject matter of claim 1. The further claims contain advantageous refinements and developments of the invention.
Die erfindungsgemäße Lösung betrifft einen hochfesten α/γ-The solution according to the invention relates to a high-strength α / γ-
Duplex- oder α/γ/ε (K) -Triplex-Leichtbaustahl mit folgender Zusammensetzung (Gehalte in Gewichts %) : 18 bis 35% Mn 8 bis 12% AI bis zu 6% Si, wobei AI + Si > 12%Duplex or α / γ / ε (K) triplex lightweight steel with the following composition (contents in weight%): 18 to 35% Mn 8 to 12% AI up to 6% Si, where AI + Si> 12%
0,5 bis 2% C höchstens 0,05% B0.5 to 2% C at most 0.05% B
0 bis 3 % Ti zumindest eines der Elemente Mg, Ga, Be mit einem Gehalt von jeweils bis zu 3% mit Rest, im wesentlichen Eisen, einschließlich üblicher0 to 3% Ti of at least one of the elements Mg, Ga, Be with a content of up to 3% each with the rest, essentially iron, including conventional ones
Stahlbegleitelemente . Besonders günstig ist dabei eine Weiterbildung der Erfindung mit mehr als 3% des leichten Elements Si.Steel accompanying elements. A further development of the invention with more than 3% of the light element Si is particularly favorable.
Gemäß einer sehr günstigen Weiterbildung der Erfindung sind die Anteile der Elemente Mg, Ga und Be soweit vorhanden jeweils größer als 0,3%.According to a very favorable development of the invention, the proportions of the elements Mg, Ga and Be, if present, are each greater than 0.3%.
Als weitere Legierungselemente finden gemäß von Weiterbildungen der erfindungsgemäßen Legierung bevorzugt die Elemente N, Nb, V und ggf. Ti mit den folgenden Anteilen Verwendung:According to further developments of the alloy according to the invention, the elements N, Nb, V and possibly Ti with the following proportions are preferably used as further alloy elements:
0,03 bis 2% Ti0.03 to 2% Ti
N kleiner als 0, 3%N less than 0.3%
Nb kleiner als 0,5%Nb less than 0.5%
V kleiner als 0,5%.V less than 0.5%.
Der erfindungsgemäße Leichtbaustahl wird aus einem mehrphasigen Gefüge im Falle des Duplex-Stahls aus α-Ferrit- und γ-Austenit- Mischkristallen gebildet. Im Falle des Triplex-Stahls tritt zu den beiden erstgenannten Phasen noch eine artensitische ε- Phase und/oder K-Phase hinzu. Das spezifische Gewicht des erfindungsgemäßen Stahls wird durch die hohen Anteile der leichten Legierungselemente AI, Si, C und Mn sowie zumindest eines der Elemente Mg, Ga, Be und ggf. Ti auf niedrige Werte abgesenkt. Mit beiden Legierungen wird eine Dichte unter 7 g/cm3 erzielt, die gegenüber herkömmlichen Stählen mit Werten zwischen 7,3 bis 7,5 g/cm3 um bis zu 15% deutlich verringert ist. Auch gegenüber den aus der Literatur bekannten Leichtbaustählen mit bis zu 8% Aluminiumanteil weist die erfindungsgemäße Lösung eine weitere Verringerung der Dichte auf.The lightweight steel according to the invention is formed from a multi-phase structure in the case of duplex steel from α-ferrite and γ-austenite mixed crystals. In the case of triplex steel, an artensitic ε phase and / or K phase is added to the first two phases. The specific weight of the steel according to the invention is reduced to low values by the high proportions of the light alloy elements Al, Si, C and Mn and at least one of the elements Mg, Ga, Be and possibly Ti. A density below 7 g / cm 3 is achieved with both alloys, which is significantly reduced by up to 15% compared to conventional steels with values between 7.3 and 7.5 g / cm 3 . The solution according to the invention also has a further reduction in density compared to the lightweight steels known from the literature with up to 8% aluminum content.
Der Leichtbaustahl gemäß der Erfindung erzielt durch das Element Mg, soweit es in der Legierung vorhanden ist, eine weitere Absenkung seiner Dichte, aufgrund des sehr geringen spezifischen Gewichts von Mg. Vergleichbares gilt für Be, soweit es in der Legierung vorhanden ist, wobei hier zusätzlich noch eine Steigerung der Festigkeit erreicht wird, welche unter Beibehalten der Dukltilität erzielbar ist. Durch das Element Ti wird, sofern es in der Legierung vorhanden ist, eine weitere Festigkeitssteigerung durch Kornfeinung und Mischkritallhärtung erreicht. Auch das Element Ga dient, sofern es in der Legierung vorhanden ist, der Steigerung von Festigkeit und Härte. Ausserdem steigert es die Vergießbarkeit der Legierung, da diese durch den Anteil an Ga bei vergleichbaren Temperaturbedingungen flüssiger wird.The lightweight steel according to the invention achieves one through the element Mg, insofar as it is present in the alloy further lowering of its density due to the very low specific weight of Mg. The same applies to Be, insofar as it is present in the alloy, an additional increase in strength being achieved here, which can be achieved while maintaining the ductility. If the element Ti is present in the alloy, a further increase in strength is achieved through grain refinement and mixed crystal hardening. The element Ga, if present in the alloy, also serves to increase strength and hardness. In addition, it increases the castability of the alloy, since the proportion of Ga makes it more liquid at comparable temperature conditions.
Der erfindungsgemäße Duplex- bzw. Triplex-Leichtbaustahl zeichnet sich im kaltgewalzten und rekristallisierten Zustand durch ein feinkörniges zwei- bzw. dreiphasiges Gefüge mit äquiaxialer d.h. isotroper Morphologie der α-Ferrit-, γ- Austenit- bzw. ε-Martensit-Körner aus.The duplex or triplex lightweight steel according to the invention is characterized in the cold-rolled and recrystallized state by a fine-grained two- or three-phase structure with an equiaxial i.e. isotropic morphology of the α-ferrite, γ-austenite or ε-martensite grains.
Der Verfestigungsexponent des Duplex-/Triplex-Stahls liegt bei n = 0,23 bis 0,24 und der mittlere r-Wert (planare Anisotropie) beträgt: r = (r0° + r90° + 2r45°)/4 = 1. D.h. dieser Leichtbaustahl verhält sich bezüglich einer planaren Formänderung beim Tief- und Streckziehen quasiisotrop (Δr = 0) .The strengthening exponent of the duplex / triplex steel is n = 0.23 to 0.24 and the mean r-value (planar anisotropy) is: r = (r0 ° + r90 ° + 2r45 °) / 4 = 1. That is. this lightweight steel behaves quasi-isotropically with respect to a planar shape change during deep drawing and stretch drawing (Δr = 0).
Das jeweilige feinkörnige zwei- bzw. dreiphasige Gefüge erhöht die Energieabsorption - die dissipative Energie - dieses Stahls bei Beanspruchung unter hoher Dehnungsgeschwindigkeit, wie sie beispielsweise durch Impactbelastung oder im Crashfall auftritt .The respective fine-grained two-phase or three-phase structure increases the energy absorption - the dissipative energy - of this steel when subjected to stress at high expansion speeds, such as occurs due to impact loads or in the event of a crash.
Der Leichtbaustahl zeichnet sich durch Fließspannungen von über 400 MPa aus. Durch eine hohe Verfestigung infolge starker Wechselwirkung der Versetzungen der koexistierenden /γ- bzw. α/γ/ε (K) -Phasen werden Zugfestigkeiten am Warmband von bis zu 1000 MPa erzielt und Gleichmaßdehnungen bis zu 40% sowie maximale Dehnungen bis zu 50% erreicht. Das rekristallisierend geglühte Kaltband weist Festigkeiten im Bereich von 900 MPa bei maximalen Dehnungen von 70% auf.The lightweight steel is characterized by yield stresses of over 400 MPa. Due to a high degree of solidification due to strong interaction of the dislocations of the coexisting / γ- or α / γ / ε (K) phases, tensile strengths on the hot strip of up to 1000 MPa are achieved and uniform strains up to 40% and maximum strains up to 50%. The recrystallizing annealed cold strip has strengths in the range of 900 MPa with maximum elongations of 70%.
Besonders vorteilhaft ist die gegenüber herkömmlichen Stählen deutlich abgesenkte Dichte. Der erfindungsgemäße Leichtbaustahl weist auch gegenüber den aus dem Stand der Technik bekannten Leichtbaustählen mit Aluminium-Bestandteilen eine bisher nicht gekannte Dichtereduzierung auf.The significantly lower density than conventional steels is particularly advantageous. The lightweight steel according to the invention also has a previously unknown density reduction compared to the lightweight steel with aluminum components known from the prior art.
Ein weiterer Vorteil der erfindungsgemäßen Lösung liegt darin, dass trotz seiner hohen Festigkeiten der Werkstoff eine sehr gute Umformbarkeit aufweist. Diese Eigenschaften waren bisher nur mit hochlegierten Edelstahlen erreicht worden. Besonders hervorzuheben ist auch seine Gießfähigkeit bei der Verarbeitung, welche wie bereits erwähnt, bei Vorhandensein von Ga nochmals verbessert ist.Another advantage of the solution according to the invention is that, despite its high strength, the material has very good formability. These properties had previously only been achieved with high-alloy stainless steel. Particularly noteworthy is its pourability during processing, which, as already mentioned, is further improved in the presence of Ga.
Das beschriebene Eigenschaftsspektrum einer höheren Bauteilfestigkeit, der höheren Gestaltungsfreiheit in der Geometrie sowie der verringerten Werkstoffdichte führt zum Ziel, ein verringertes Bauteilgewicht durch Stoff- und Formleichtbau zu erhalten.The described range of properties of a higher component strength, the greater freedom of design in the geometry as well as the reduced material density leads to the goal of obtaining a reduced component weight through lightweight construction and lightweight construction.
Damit hat der erfindungsgemäße α/γ-Duplex- oder α/γ/ε (K) - Triplex- Leichtbaustahl eine weitere Verbesserung in der Kombination bisher nicht bekannter vorteilhafter Eigenschaften zur Folge.The α / γ duplex or α / γ / ε (K) triplex lightweight steel according to the invention thus results in a further improvement in the combination of previously unknown advantageous properties.
Durch den hohen Anteil an Legierungsbestandteilen mit einem spezifischen Gewicht unterhalb des spezifischen Gewichts von Eisen und bisher bekannten Leichtbaustählen wird eine für die Autoindustrie vorteilhafte Gewichtsreduzierung unter Beibehaltung der bisherigen Konstruktionsbauweise erreicht. Im weiteren weist der Leichtbaustahl eine ausgezeichnete Duktilität, eine hohe Festigkeit und eine extrem hohe Verfestigungsrate auf. Hervorzuheben ist die Eigenschaft einer hohen Belastungsgeschwindigkeit im Crashverhalten bei einem Unfall, so dass diese Stahllegierung besonders für den Kraftfahrzeugbau geeignet ist. Im weiteren besteht eine erhöhte Korrosions- und insbesondere Spannungsriß-Korrosionsbeständigkeit, so dass sich diese Stahllegierung auch für den Einsatz in anderen technologischen Gebieten beispielsweise im Bauwesen eignet .Due to the high proportion of alloy components with a specific weight below the specific weight of iron and previously known lightweight steels, one for the Auto industry achieved advantageous weight reduction while maintaining the previous design. Furthermore, the lightweight steel has excellent ductility, high strength and an extremely high hardening rate. The property of a high loading speed in the crash behavior in the event of an accident should be emphasized, so that this steel alloy is particularly suitable for motor vehicle construction. Furthermore, there is an increased resistance to corrosion and, in particular, stress crack corrosion, so that this steel alloy is also suitable for use in other technological areas, for example in construction.
Bei Betonkonstruktionen, d. h. insbesondere als Spannbetonstähle und Moniereisen (- Stähle) oder Leitplanken und Spundwände lassen sich die erfindungsgemäßen Leichtbaustähle hervorragend einsetzen. Die Korrosionsbeständigkeit kann im weiteren durch chemische, elektrochemische, organische, nichtmetallische oder metallische Beschichtungen verbessert werden.In concrete structures, i.e. H. The lightweight steels according to the invention can be used excellently, in particular as prestressed concrete steels and reinforcing bars (steel) or guard rails and sheet piling. The corrosion resistance can further be improved by chemical, electrochemical, organic, non-metallic or metallic coatings.
Auch besteht die Möglichkeit, durch eine chemische, elektrochemische oder thermische Behandlung eine Vergütung der Stahllegierung herbeizuführen.There is also the possibility of effecting tempering of the steel alloy by chemical, electrochemical or thermal treatment.
Die Bildung einer schützenden Deckschicht kann dadurch erzielt werden, dass die Oberfläche mit Aluminium angereichert und/oder beschichtet ist.The formation of a protective cover layer can be achieved by enriching and / or coating the surface with aluminum.
Der tief- und streckziehfähige aluminiumhaltige Stahl wird im Herstellungsverfahren erschmolzen, im Stranggießverfahren vergossen, abgewalzt im Temperaturbereich oberhalb der Rekristallisierungstemperatur oder durch das Gießwalzen, Dünnbandgießen bevorzugt, als endabmessungsnahes Band abgegossen. Der Stahl kann entweder als Warmband direkt weiterverarbeitet oder nach dem Warmwalzen kaltgewalzt weiterverarbeitet werden.The deep- and stretch-drawable aluminum-containing steel is melted in the manufacturing process, cast in the continuous casting process, rolled in the temperature range above the recrystallization temperature or preferably by casting rolling, thin strip casting, cast as a strip close to the final dimension. The steel can either be directly processed as hot strip or can be cold rolled after hot rolling.
Neben den bereits erwähnten Verwendungsmöglichkeiten im Fahrzeugbau eignet sich der erfindungsgemäße Leichtbaustahl insbesondere zur Bauteilfertigung für Rohbaukomponenten/Karosserie, Integralträger, Fahrwerkstrukturen und Space Frames. Weitere Leichtbauteile in Kraftfahrzeugen sind Lenkung, Achsen und Achskomponenten, Anbauteile, Sitzschienen, Befestigungsteile sowie Systeme für die passive Sicherheit, Radaufhängungen, Antriebsstrang und Kraftstoffbehälter.In addition to the already mentioned possible uses in vehicle construction, the lightweight steel according to the invention is particularly suitable for component production for body-in-white components / body, integral beams, chassis structures and space frames. Other lightweight components in motor vehicles are steering, axles and axle components, add-on parts, seat rails, fastening parts and systems for passive safety, wheel suspensions, drive train and fuel tanks.
Ebenso erstreckt sich der Anwendungsbereich auf Schienen- und Wasserfahrzeuge sowie in Luft- und Raumfahrt, dort bevorzugt in dünnwandigen steifigkeitsrelevanten Bauteilen.The area of application also extends to rail and water vehicles as well as in aerospace, there preferably in thin-walled components relevant to rigidity.
Neben dem bereits beschriebenen Einsatz in der Baubranche, insbesondere im Hochbau, eignet sich der Werkstoff ebenso für Förderanlagen, Transportbänder und im Hüttenwesen. In addition to the use already described in the construction industry, especially in building construction, the material is also suitable for conveyor systems, conveyor belts and in metallurgy.

Claims

Patentansprüche claims
1. Hochfester α/γ-Duplex oder α/γ/ε (K) -Triplex Leichtbaustahl, g e k e n n z e i c h n e t d u r c h folgende Zusammensetzung (Gehalte in Gewichts %) :1.High-strength α / γ-duplex or α / γ / ε (K) -triplex lightweight steel, g e k e n n z e i c h n e t d u r c h the following composition (contents in weight%):
18 bis 35% Mn18 to 35% Mn
8 bis 12% AI bis zu 6% Si, wobei AI + Si > 12%8 to 12% AI up to 6% Si, where AI + Si> 12%
0,5 bis 2% C höchstens 0.05% B0.5 to 2% C at most 0.05% B
0 bis 3 % Ti zumindest eines der Elemente Mg, Ga, Be mit einem Gehalt von jeweils bis zu 3% mit Rest, im wesentlichen Eisen, einschließlich üblicher0 to 3% Ti of at least one of the elements Mg, Ga, Be with a content of up to 3% each with the rest, essentially iron, including conventional ones
Stahlbegleitelemente .Steel accompanying elements.
2. Hochfester Leichtbaustahl nach Anspruch 1, g e k e n n z e i c h n e t d u r c h, einen Gehalt von Si > 3%.2. High-strength lightweight steel according to claim 1, g e k e n n z e i c h n e t d u r c h, a content of Si> 3%.
3. Hochfester Leichtbaustahl nach Anspruch 1 oder 2, g e k e n n z e i c h n e t d u r c h,3. High-strength lightweight steel according to claim 1 or 2, g e k e n n z e i c h n e t d u r c h,
Mg und/oder Ga und/oder Be mit einem Anteil von größer als 0,3%.Mg and / or Ga and / or Be with a proportion greater than 0.3%.
4. Hochfester Leichtbaustahl nach Anspruch 1, 2 oder 3, g e k e n n z e i c h n e t d u r c h,4. High-strength lightweight steel according to claim 1, 2 or 3, g e k e n n z e i c h n e t d u r c h,
Ti mit einem Anteil von 0,03 bis 2%. Ti with a share of 0.03 to 2%.
5. Hochfester Leichtbaustahl nach einem der Ansprüche 1 bis 4, g e k e n n z e i c h n e t d u r c h folgende Anteile weiterer Legierungselemente bis zu 0,3% N bis zu 0,5% Nb bis zu 0,5% V.5. High-strength lightweight steel according to any one of claims 1 to 4, the following proportions of further alloying elements up to 0.3% N up to 0.5% Nb up to 0.5% V.
6. Hochfester Leichtbaustahl nach einem der Ansprüche 1 bis 5, g e k e n n z e i c h n e t d u r c h ein feinkörniges zweiphasiges α/γ-Duplexgefüge oder dreiphasiges α/γ/ε (K) - Triplexgefüge mit äquiaxialer Morphologie im kaltgewalzten und rekristallisierten Zustand.6. High-strength lightweight steel according to one of claims 1 to 5, g e k e n n z e i c h n e t d u r c h a fine-grained two-phase α / γ duplex structure or three-phase α / γ / ε (K) - triplex structure with equiaxial morphology in the cold-rolled and recrystallized state.
7. Hochfester Leichtbaustahl nach einem der Ansprüche 1 bis 6, g e k e n n z e i c h n e t d u r c h eine planare Isotropie mit r « 1, d.h. ein Stahl, der in der Blechebene nahezu isotrope mechanische Eigenschaften bezüglich Festigkeit und Dehnung aufweist.7.High strength lightweight steel according to one of claims 1 to 6, g e k e n n z e i c h n e t d u r c h a planar isotropy with r «1, i.e. a steel that has almost isotropic mechanical properties in terms of strength and elongation in the plane of the sheet.
8. Herstellung eines Bauteils aus hochfestem Leichtbaustahl nach einem der Ansprüche 1 bis 7 mittels eines Gießverfahrens.8. Production of a component from high-strength lightweight steel according to one of claims 1 to 7 by means of a casting process.
9. Verwendung eines Leichtbaustahls nach einem der Ansprüche 1 bis 7, als Werkstoff für Rohbau- oder Karosseriekomponenten, Integralträger, Fahrwerkstrukturen oder Space Frame bei Fahrzeugen.9. Use of a lightweight steel according to one of claims 1 to 7, as a material for bodyshell or body components, integral beams, chassis structures or space frames in vehicles.
10. Verwendung eines Leichtbaustahls nach einem der Ansprüche 1 bis 7, als Werkstoff für Hochbau, Förderanlagen, Hüttenwesen, sowie Leitplanken und Spundwände. 10. Use of a lightweight steel according to one of claims 1 to 7, as a material for building construction, conveyor systems, metallurgy, and crash barriers and sheet piling.
EP02800111A 2001-09-28 2002-09-25 High-strength duplex/triplex steel for lightweight construction and use thereof Expired - Lifetime EP1430161B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10148101 2001-09-28
DE10148101 2001-09-28
DE10231125A DE10231125A1 (en) 2001-09-28 2002-07-10 High strength duplex / triplex lightweight engineering steel and its use
DE10231125 2002-07-10
PCT/EP2002/010679 WO2003029504A2 (en) 2001-09-28 2002-09-25 High-strength duplex/triplex steel for lightweight construction and use thereof

Publications (2)

Publication Number Publication Date
EP1430161A2 true EP1430161A2 (en) 2004-06-23
EP1430161B1 EP1430161B1 (en) 2005-06-15

Family

ID=26010254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02800111A Expired - Lifetime EP1430161B1 (en) 2001-09-28 2002-09-25 High-strength duplex/triplex steel for lightweight construction and use thereof

Country Status (6)

Country Link
US (1) US20070125454A1 (en)
EP (1) EP1430161B1 (en)
JP (1) JP2005504175A (en)
AT (1) ATE298009T1 (en)
ES (1) ES2242899T3 (en)
WO (1) WO2003029504A2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1807542A1 (en) * 2004-11-03 2007-07-18 ThyssenKrupp Steel AG High-strength steel strip or sheet exhibiting twip properties and method for producing said strip by direct strip casting "
DE102005017929A1 (en) * 2005-04-18 2006-10-19 Friedr. Fingscheidt Gmbh Use of a lightweight steel
DE102005057599A1 (en) * 2005-12-02 2007-06-06 Volkswagen Ag lightweight steel
DE102005062221B3 (en) * 2005-12-20 2007-05-03 Salzgitter Flachstahl Gmbh Deformable light alloy steel with TRIP) and TWIP properties useful in production of products having decreased crack liability twinning induced plasticity (TWIP) good ductility and tensile strength without increase in hydrogen embrittlement
DE102006030699B4 (en) 2006-06-30 2014-10-02 Daimler Ag Cast steel piston for internal combustion engines
ES2399928T3 (en) * 2006-08-23 2013-04-04 Neurogen Corporation 2-phenoxypyrimidinone analogues
DE102008020757A1 (en) 2007-04-30 2008-11-06 Volkswagen Ag Sheet workpiece forming method, involves inserting sheet workpiece into molding tool at specific temperature, forming workpiece by molding tool, and extracting heat from workpiece during retention period
JP5286409B2 (en) 2008-11-05 2013-09-11 本田技研工業株式会社 High strength steel plate and manufacturing method thereof
WO2010052052A1 (en) * 2008-11-07 2010-05-14 Siemens Aktiengesellschaft Rotor for a turbomachine
US20120121452A1 (en) * 2009-03-11 2012-05-17 Salzgitter Flachstahl Gmbh Method for producing a hot rolled strip and hot rolled strip produced from triplex lightweight steel
US20120067492A1 (en) * 2010-09-22 2012-03-22 Yann Bernard Duval Tires with high strength reinforcement
DE102011117135A1 (en) 2010-11-26 2012-05-31 Salzgitter Flachstahl Gmbh Energy-saving container made of lightweight steel
RU2625512C2 (en) * 2015-12-03 2017-07-14 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Structured casting ausaging steel with high strength-weight ratio and method of its processing
RU2652935C1 (en) * 2016-11-28 2018-05-03 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Structural foundry and deformable by microalloy nitrogen austenite heat-resistant cryogenic steel with high specific strength and method of its treatment
RU2652934C1 (en) * 2016-11-28 2018-05-03 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Structural wrought austenitic non-magnetic heat-resistant cryogenic steel with high specific strength and method of its treatment
US11530468B2 (en) 2018-06-12 2022-12-20 The Trustees Of Dartmouth College High-entropy alloys with high strength

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB938401A (en) * 1959-05-14 1963-10-02 Langley Alloys Ltd Improvements in iron-aluminium-manganese alloys
GB841366A (en) * 1957-07-02 1960-07-13 Langley Alloys Ltd Improvements in iron aluminium alloys
DE1182844B (en) * 1959-06-23 1964-12-03 Ford Werke Ag Austenitic steel alloy
SU348089A1 (en) * 1970-02-14 1978-05-25 Предприятие П/Я М-5641 High-temperature steel
US4865662A (en) * 1987-04-02 1989-09-12 Ipsco Inc. Aluminum-manganese-iron stainless steel alloy
GB2220674A (en) * 1988-06-29 1990-01-17 Nat Science Council Alloys useful at elevated temperatures
US5278881A (en) * 1989-07-20 1994-01-11 Hitachi, Ltd. Fe-Cr-Mn Alloy
DE19727759C2 (en) * 1997-07-01 2000-05-18 Max Planck Inst Eisenforschung Use of a lightweight steel
DE102005027258B4 (en) * 2005-06-13 2013-01-31 Daimler Ag High carbon steel with superplasticity

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03029504A2 *

Also Published As

Publication number Publication date
ATE298009T1 (en) 2005-07-15
WO2003029504A2 (en) 2003-04-10
EP1430161B1 (en) 2005-06-15
JP2005504175A (en) 2005-02-10
US20070125454A1 (en) 2007-06-07
ES2242899T3 (en) 2005-11-16
WO2003029504A3 (en) 2003-11-27

Similar Documents

Publication Publication Date Title
EP2383353B1 (en) High tensile steel containing Mn, steel surface product made from such steel and method for producing same
EP2366035B1 (en) Manganese steel strip having an increased phosphorus content and process for producing the same
EP1309734B1 (en) Highly stable, steel and steel strips or steel sheets cold-formed, method for the production of steel strips and uses of said steel
EP1430161B1 (en) High-strength duplex/triplex steel for lightweight construction and use thereof
WO2008009722A1 (en) Rustproof austenitic cast steel, method for production and use thereof
KR101275895B1 (en) Method of producing austenitic iron/carbon/manganese steel sheets having very high strength and elongation characteristics and excellent homogeneity
KR101779305B1 (en) Austenitic stainless steel sheet and method for producing same
EP3083239B1 (en) Flat steel product for components of a car body for a motor vehicle
DE60133493T2 (en) Hot-dip galvanized steel sheet and process for its production
WO2009090231A1 (en) Parts made of austenitic cast iron having an increased carbon content, methods for the production thereof, and use thereof
US9315883B2 (en) High strength and low density particle-reinforced steel with improved E-modulus and method for producing said steel
EP2905348B1 (en) High strength flat steel product with bainitic-martensitic structure and method for manufacturing such a flat steel product
EP0576107B1 (en) Use of a steel for the manufacture of constructiontubes
EP1905857B1 (en) High-strength steel and applications for such steel
WO2009090228A1 (en) Parts made of high-strength, ductile cast steel having a high manganese content, method for the production thereof, and use thereof
WO2018083028A1 (en) Seamless tube of a medium manganese steel and method for the production thereof
EP3625045B1 (en) Hot-working material, component and use
EP3573826A1 (en) Steel material composite with inhomogeneous property distribution
EP3847284B1 (en) Hot-rolled flat steel product and method for the production thereof
DE10231125A1 (en) High strength duplex / triplex lightweight engineering steel and its use
WO2017167778A1 (en) Steel having reduced density and method for producing a flat or long steel product from such a steel
DE102021129464A1 (en) PRESS HARDENING STEEL WITH A COMBINATION OF BETTER CORROSION RESISTANCE AND ULTRA HIGH STRENGTH
EP3458623B1 (en) Method for producing a steel material, and steel material
EP3122910A2 (en) Components made of a steel alloy and method for producing high-strength components
EP0994197B1 (en) Steel alloy

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

17P Request for examination filed

Effective date: 20040304

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FUSSNEGGER, WOLFGANG

Inventor name: GERICK, ARNDT

Inventor name: KLEINEKATHOEFER, WOLFGANG

Inventor name: FROMMEYER, GEORG

Inventor name: EIPPER, KONRAD

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50203428

Country of ref document: DE

Date of ref document: 20050721

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050915

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050915

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050915

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050915

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050925

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2242899

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051124

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
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

Effective date: 20060316

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20060914

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060921

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20060922

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20060928

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060930

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060930

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20061012

Year of fee payment: 5

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

BERE Be: lapsed

Owner name: *DAIMLERCHRYSLER A.G.

Effective date: 20070930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20070925

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070925

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20080531

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: 20071001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070925

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070925

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090922

Year of fee payment: 8

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50203428

Country of ref document: DE

Effective date: 20110401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110401