EP1430161B1 - Hochfester duplex-/triplex-leichtbaustahl und seine verwendung - Google Patents
Hochfester duplex-/triplex-leichtbaustahl und seine verwendung Download PDFInfo
- Publication number
- EP1430161B1 EP1430161B1 EP02800111A EP02800111A EP1430161B1 EP 1430161 B1 EP1430161 B1 EP 1430161B1 EP 02800111 A EP02800111 A EP 02800111A EP 02800111 A EP02800111 A EP 02800111A EP 1430161 B1 EP1430161 B1 EP 1430161B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- structural steel
- strength
- lightweight structural
- steel according
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
-
- 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
Definitions
- the invention relates to a high-strength and very deep-drawable Duplex or Triplex lightweight steel and its Use.
- High strength steel is used for the automotive industry, construction industry as well as in aerospace applications with different Properties developed and already in production used. This is especially in use in the Automobile industry increasingly the desire in the foreground, through new materials a weight reduction of the vehicle make.
- the aim is to produce lighter ones Steel alloys, which otherwise the previous favorable Maintain or improve properties.
- the austenitic or austenitic / ferritic Lightweight steel a composition on with 7-27 Wt% Mn, 1-10 wt% Al, less than 10 wt% Cr, less than 10% by weight of Ni, more than 0.7-4% by weight of Si, less than 3 Wt .-% Cu, less than 0.5 wt .-% C and a remainder Composition of iron and melting Impurities.
- the other alloy components can from small amounts of nitrogen, niobium, titanium, vanadium and Phosphorus exist.
- the known lightweight structural steels listed above have Although important advantageous properties for use in the these technology areas, but they are with significant disadvantages. Further weight savings, For example, in the auto industry, can be with the known steels only by further reducing the Sheet thickness or by additional design measures to reach. Good formability, d. H. deep and stretchable, cold-rolled and recrystallizing annealed deep drawing steels higher aluminum content, as they are especially for the application are needed in the automotive industry, are due to a still to high specific gravity from the state of the Technique not known in this form.
- EP-A-414 949 describes an ⁇ - ⁇ duplex lightweight steel having a composition similar that of the invention, but with lower Si content and without Mg and / or Ga and / or Be contents.
- the invention is based on the object, a good kaltumformbaren, especially good deep drawing and stretchable high strength Lightweight steel to create its density under the specific density of previously known steels.
- the lightweight structural steel according to the invention is formed from a multi-phase structure in the case of duplex steel made of ⁇ -ferrite and ⁇ -austenite mixed crystals.
- a martensitic ⁇ -phase and / or ⁇ -phase is added to the first two phases.
- the specific weight of the steel according to the invention is lowered to low values by the high proportions of the light alloying elements Al, Si, C and Mn and at least one of the elements Mg, Ga, Be and optionally Ti. With both alloys, a density of less than 7 g / cm 3 is achieved, which is significantly reduced by up to 15% compared to conventional steels with values of between 7.3 and 7.5 g / cm 3 .
- the solution according to the invention has a further reduction in density.
- the lightweight steel according to the invention achieved by the Element Mg, as far as it is present in the alloy, a further lowering its density, due to the very low specific gravity of Mg.
- Be as far as it is present in the alloy, here additionally still an increase in the strength is achieved, which under Maintaining the Dukltiltician is achievable.
- the element Ti is, if it is present in the alloy, another Increase in strength through grain refining and mixed critical hardening reached.
- the element Ga serves, provided it is in the alloy exists, increasing strength and hardness. In addition, it increases the castability of the alloy, since these by the proportion of Ga at comparable Temperature conditions becomes more fluid.
- the inventive duplex or triplex lightweight steel is characterized in the cold-rolled and recrystallized state by a fine-grained two- or three-phase structure with equiaxial i. isotropic morphology of ⁇ -ferrite, ⁇ -austenite or ⁇ -martensite grains.
- This lightweight steel behaves with respect to a planar change in shape during Deep and ironing quasi-isotropic ( ⁇ r ⁇ 0).
- the respective fine-grained two- or three-phase structure increases the energy absorption - the dissipative energy - of this steel when subjected to high strain rate, as they are for example, by impact load or in the event of a crash occurs.
- the lightweight steel is characterized by yield stresses of over 400 MPa. Due to a high solidification due to strong Interaction of the displacements of the coexisting ⁇ / ⁇ or ⁇ / ⁇ / ⁇ ( ⁇ ) phases become tensile strengths on the hot strip of up to Achieved 1000 MPa and uniform expansions up to 40% as well maximum strains up to 50% achieved.
- the recrystallizing annealed cold-rolled strip has strengths in the range of 900 MPa maximum strains of 70%.
- the lightweight construction steel according to the invention also indicates that known from the prior art Lightweight steels with aluminum components one not yet Known density reduction on.
- Another advantage of the solution according to the invention is that, despite its high strength, the material is a very has good formability. These properties have been so far only achieved with high-alloyed stainless steels. Especially also worth mentioning is its pourability during processing, which, as already mentioned, in the presence of Ga is improved again.
- the ⁇ / ⁇ -duplex or ⁇ / ⁇ / ⁇ ( ⁇ ) -triplex Lightweight steel is another improvement in the Combination of previously unknown advantageous properties result.
- the lightweight steel Due to the high proportion of alloy components with one specific gravity below the specific weight of Iron and previously known lightweight steels will be one for the Auto industry advantageous weight reduction while maintaining achieved the previous design construction.
- the lightweight steel has an excellent Ductility, high strength and extremely high Solidification rate on. To emphasize is the property of a high load speed in crash behavior at a Accident, making this steel alloy especially for the Motor vehicle construction is suitable. Furthermore, there is an increased Corrosion and in particular stress cracking corrosion resistance, so that this steel alloy is also suitable for use in other technological fields such as construction suitable.
- d. H. especially as prestressed concrete steels and Monierisen (- steels) or crash barriers and Sheet piling can be the lightweight steels of the invention excellent use.
- the corrosion resistance can in others by chemical, electrochemical, organic, non-metallic or metallic coatings are improved.
- a protective cover layer can thereby be achieved be that the surface enriched with aluminum and / or is coated.
- the deep and stretchable aluminum-containing steel is used in the Production process melted, in the continuous casting process potted, rolled in the temperature range above the Recrystallization temperature or by casting, thin strip casting preferably, poured off as near-net-near band.
- the steel can either be processed directly as a hot strip or cold-rolled after hot rolling.
- the lightweight structural steel according to the invention is suitable in particular for the production of components for body shell components / body, Integral beams, suspension structures and space Frames.
- Other lightweight components in motor vehicles are steering, Axles and axle components, attachments, seat rails, Fasteners and systems for passive safety, Wheel suspensions, driveline and fuel tank.
- the scope extends to rail and Watercraft and aerospace, there preferably in thin-walled stiffness-relevant components.
- the material is also suitable for Conveying systems, conveyor belts and metallurgy.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Body Structure For Vehicles (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Description
Claims (8)
- Hochfester α/γ-Duplex oder α/γ/ε-Triplex Leichtbaustahl mit folgender Zusammensetzung (Gehalte in Gewichts %):18 bis 35% Mn,8 bis 12% Al,3 bis 6% Si, wobei Al + Si > 12%,0,5 bis 2% C,höchstens 0,05% B,höchstens 3 % Ti,zumindest eines der Elemente Mg, Ga, Be mit einem Gehalt von jeweils 0,3% bis zu 3%,mit Rest, im wesentlichen aus Eisen, einschließlich üblicher Stahlbegleitelemente.
- Hochfester Leichtbaustahl nach Anspruch 1, gekennzeichnet durch,
Ti mit einem Anteil von 0,03 bis 2%. - Hochfester Leichtbaustahl nach einem der Ansprüche 1 oder 2, gekennzeichnet durch folgende Anteile weiterer Legierungselementebis zu 0,3% Nbis zu 0,5% Nbbis zu 0,5% V.
- Hochfester Leichtbaustahl nach einem der Ansprüche 1 bis 3 , gekennzeichnet durch
ein feinkörniges zweiphasiges α/γ-Duplexgefüge oder dreiphasiges α/γ/ε-Triplexgefüge mit äquiaxialer Morphologie im kaltgewalzten und rekristallisierten Zustand. - Hochfester Leichtbaustahl nach einem der Ansprüche 1 bis 4, gekennzeichnet durch eine planare Isotropie mit r ≈ 1, d.h. ein Stahl, der in der Blechebene nahezu isotrope mechanische Eigenschaften bezüglich Festigkeit und Dehnung aufweist.
- Herstellung eines Bauteils aus hochfestem Leichtbaustahl nach einem der Anspniche 1 bis 5 mittels eines Gießverfahrens.
- Verwendung eines Leichtbaustahls nach einem der Ansprüche 1 bis 5, als Werkstoff für Rohbau- oder Karosseriekomponenten, Integralträger, Fahrwerkstrukturen oder Space Frame bei Fahrzeugen.
- Verwendung eines Leichtbaustahls nach einem der Ansprüche 1 bis 5, als Werkstoff für Hochbau, Förderanlagen, Hüttenwesen, sowie Leitplanken und Spundwände.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10148101 | 2001-09-28 | ||
| DE10148101 | 2001-09-28 | ||
| DE10231125 | 2002-07-10 | ||
| DE10231125A DE10231125A1 (de) | 2001-09-28 | 2002-07-10 | Hochfester Duplex-/Triplex-Leichtbaustahl und seine Verwendung |
| PCT/EP2002/010679 WO2003029504A2 (de) | 2001-09-28 | 2002-09-25 | Hochfester duplex-/triplex-leichtbaustahl und seine verwendung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1430161A2 EP1430161A2 (de) | 2004-06-23 |
| EP1430161B1 true EP1430161B1 (de) | 2005-06-15 |
Family
ID=26010254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02800111A Expired - Lifetime EP1430161B1 (de) | 2001-09-28 | 2002-09-25 | Hochfester duplex-/triplex-leichtbaustahl und seine verwendung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070125454A1 (de) |
| EP (1) | EP1430161B1 (de) |
| JP (1) | JP2005504175A (de) |
| AT (1) | ATE298009T1 (de) |
| ES (1) | ES2242899T3 (de) |
| WO (1) | WO2003029504A2 (de) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101065503A (zh) * | 2004-11-03 | 2007-10-31 | 蒂森克虏伯钢铁股份公司 | 具有twip性能的高强度钢带或薄钢板以及通过钢带连铸制备它的方法 |
| DE102005017929A1 (de) * | 2005-04-18 | 2006-10-19 | Friedr. Fingscheidt Gmbh | Verwendung eines Leichtbaustahls |
| DE102005057599A1 (de) * | 2005-12-02 | 2007-06-06 | Volkswagen Ag | Leichtbaustahl |
| DE102005062221B3 (de) * | 2005-12-20 | 2007-05-03 | Salzgitter Flachstahl Gmbh | Umformbarer Leichtbaustahl |
| DE102006030699B4 (de) | 2006-06-30 | 2014-10-02 | Daimler Ag | Gegossener Stahlkolben für Verbrennungsmotoren |
| CA2660957C (en) * | 2006-08-23 | 2016-10-11 | Neurogen Corporation | 2-phenoxy pyrimidinone analogues |
| DE102008020757A1 (de) | 2007-04-30 | 2008-11-06 | Volkswagen Ag | Verfahren zur Umformung von Blechwerkstücken aus Eisen-Mangan-Stahl |
| US9267193B2 (en) | 2008-11-05 | 2016-02-23 | Honda Motor Co., Ltd | High-strength steel sheet and the method for production therefor |
| WO2010052052A1 (de) * | 2008-11-07 | 2010-05-14 | Siemens Aktiengesellschaft | Rotor für eine strömungsmaschine |
| EP2406023A1 (de) * | 2009-03-11 | 2012-01-18 | Salzgitter Flachstahl GmbH | Verfahren zum erzeugen eines warmbandes und aus einem triplex-leichtbaustahl hergestelltes warmband |
| US20120067492A1 (en) * | 2010-09-22 | 2012-03-22 | Yann Bernard Duval | Tires with high strength reinforcement |
| DE102011117135A1 (de) * | 2010-11-26 | 2012-05-31 | Salzgitter Flachstahl Gmbh | Energie speicherndes Behältnis aus Leichtbaustahl |
| RU2625512C2 (ru) * | 2015-12-03 | 2017-07-14 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Конструкционная литейная аустенитная стареющая сталь с высокой удельной прочностью и способ ее обработки |
| RU2652935C1 (ru) * | 2016-11-28 | 2018-05-03 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Конструкционная литейная и деформируемая микролегированная азотом аустенитная теплостойкая криогенная сталь с высокой удельной прочностью и способ ее обработки |
| RU2652934C1 (ru) * | 2016-11-28 | 2018-05-03 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Конструкционная деформируемая аустенитная немагнитная теплостойкая криогенная сталь с высокой удельной прочностью и способ ее обработки |
| US11530468B2 (en) | 2018-06-12 | 2022-12-20 | The Trustees Of Dartmouth College | High-entropy alloys with high strength |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB841366A (en) * | 1957-07-02 | 1960-07-13 | Langley Alloys Ltd | Improvements in iron aluminium alloys |
| GB938401A (en) * | 1959-05-14 | 1963-10-02 | Langley Alloys Ltd | Improvements in iron-aluminium-manganese alloys |
| DE1182844B (de) * | 1959-06-23 | 1964-12-03 | Ford Werke Ag | Austenitische Stahllegierung |
| SU348089A1 (ru) * | 1970-02-14 | 1978-05-25 | Предприятие П/Я М-5641 | Жаропрочную сталь |
| 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 (de) * | 1997-07-01 | 2000-05-18 | Max Planck Inst Eisenforschung | Verwendung eines Leichtbaustahls |
| DE102005027258B4 (de) * | 2005-06-13 | 2013-01-31 | Daimler Ag | Hochkohlenstoffhaltiger Stahl mit Superplastizität |
-
2002
- 2002-09-25 AT AT02800111T patent/ATE298009T1/de not_active IP Right Cessation
- 2002-09-25 ES ES02800111T patent/ES2242899T3/es not_active Expired - Lifetime
- 2002-09-25 JP JP2003532715A patent/JP2005504175A/ja active Pending
- 2002-09-25 US US10/491,055 patent/US20070125454A1/en not_active Abandoned
- 2002-09-25 EP EP02800111A patent/EP1430161B1/de not_active Expired - Lifetime
- 2002-09-25 WO PCT/EP2002/010679 patent/WO2003029504A2/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003029504A2 (de) | 2003-04-10 |
| WO2003029504A3 (de) | 2003-11-27 |
| ES2242899T3 (es) | 2005-11-16 |
| JP2005504175A (ja) | 2005-02-10 |
| ATE298009T1 (de) | 2005-07-15 |
| EP1430161A2 (de) | 2004-06-23 |
| US20070125454A1 (en) | 2007-06-07 |
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