US20090196785A1 - Transformable Lightweight Structural Steel - Google Patents

Transformable Lightweight Structural Steel Download PDF

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Publication number
US20090196785A1
US20090196785A1 US12/158,490 US15849006A US2009196785A1 US 20090196785 A1 US20090196785 A1 US 20090196785A1 US 15849006 A US15849006 A US 15849006A US 2009196785 A1 US2009196785 A1 US 2009196785A1
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US
United States
Prior art keywords
content
structural steel
lightweight structural
transformable
value pairs
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.)
Abandoned
Application number
US12/158,490
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English (en)
Inventor
Karl-Heinz Spitzer
Hellfried Eichholz
Bianca Springub
Rune Schmidt-Jürgensen
Markus Schäperkötter
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.)
Salzgitter Flachstahl GmbH
Original Assignee
Salzgitter Flachstahl GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37814445&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20090196785(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Salzgitter Flachstahl GmbH filed Critical Salzgitter Flachstahl GmbH
Assigned to SALZGITTER FLACHSTAHL GMBH reassignment SALZGITTER FLACHSTAHL GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EICHHOLZ, HELLFRIED, SCHAEPERKOETTER, MARKUS, SCHMIDT-JUERGENSEN, RUNE, SPITZER, KARL-HEINZ, SPRINGUB, BIANCA
Publication of US20090196785A1 publication Critical patent/US20090196785A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • 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
    • C21D6/00—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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0405—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing of ferrous alloys
    • 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
    • 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
    • C21D2211/008—Martensite

Definitions

  • the invention relates to a transformable lightweight structural steel with TRIP (Transformation Induced Plasticity) and TWIP (Twinning Induced Plasticity) characteristics according to the preamble of claim 1 .
  • Transformable lightweight structural steels are known (DE 10 2004 061 284 A1, DE 197 27 759 A1, DE 101 285 44 A1).
  • the presence of residual stress in the material may lead in these and comparable steels in dependence on the structure and strength to a lagging embrittlement which is triggered by hydrogen and ultimately to cracking.
  • the problem stated in the formulation of the object is solved by a new alloying concept.
  • This is characterized by associating a higher C content to a lower Mn content and a lower C content to a higher Mn content, with the C—Mn value pairs lying approximately in a C—Mn coordinate system on a straight connection line which is distant to the connection line of C—Mn value pairs that are in balance between ⁇ (austenite fcc) and ⁇ ′ phases (martensite bcc).
  • the conversion from the ⁇ martensite phase to the ⁇ ′martensite phase causes the hydrogen to escape as a result of the lower solubility and leads either atomically or recombinant to a material weakening, possibly to cracking.
  • the addition of Al and Si is substantially the same.
  • the carbon content is a crucial element in the proposed alloying concept as it stabilizes the austenite phase and displaces hydrogen from the free lattice sites.
  • the first alloy example After annealing at 850° C., the first alloy example has a yield point R p0.2 of 480 MPa and a strength of 850 MPa with an elongation A of 58%.
  • These values for the second alloy example also after annealing at 850° C. are R p0.2 of 450 MPa, R m of 790 MPa and A of 53%.
  • a second characteristic quantity is the product of strength ⁇ elongation, which is a measure for the performance of the material. This value is at 49,300 for the alloy example 1 and at 41,870 (% ⁇ MPa) for example 2.
  • the sole FIGURE shows the C content as a function of the Mn content as plotted in a coordinate system.
  • the continuous straight connection line shows the C—Mn value pairs in balance with respect to the ⁇ austenite and the ⁇ ′ martensite phases, with consideration of addition of Al and/or Si.
  • the dashed connection line which is distant to the balance line characterizes value pairs of the optimum alloying concept with respect to material properties in the absence of a lagging crack formation (delayed fracture).
  • the hatching shown across the dashed line is intended to indicate the qualitative scatter band within which optimum properties can still be expected.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US12/158,490 2005-12-20 2006-11-22 Transformable Lightweight Structural Steel Abandoned US20090196785A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005062221.6 2005-12-20
DE102005062221A DE102005062221B3 (de) 2005-12-20 2005-12-20 Umformbarer Leichtbaustahl
PCT/DE2006/002081 WO2007076748A1 (de) 2005-12-20 2006-11-22 Umformbarer leichtbaustahl

Publications (1)

Publication Number Publication Date
US20090196785A1 true US20090196785A1 (en) 2009-08-06

Family

ID=37814445

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/158,490 Abandoned US20090196785A1 (en) 2005-12-20 2006-11-22 Transformable Lightweight Structural Steel

Country Status (10)

Country Link
US (1) US20090196785A1 (de)
EP (1) EP1969151B1 (de)
KR (1) KR20080081969A (de)
CN (1) CN101405420A (de)
AU (1) AU2006332301B2 (de)
DE (2) DE102005062221B3 (de)
RU (1) RU2430184C2 (de)
UA (1) UA88994C2 (de)
WO (1) WO2007076748A1 (de)
ZA (1) ZA200805306B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012171530A1 (en) * 2011-06-17 2012-12-20 National Oilwell Varco Denmark I/S An unbonded flexible pipe
US8852356B2 (en) 2009-03-11 2014-10-07 Salzgitter Glachstahl GmbH Method for producing a hot rolled strip and hot rolled strip produced from ferritic steel
US9393615B2 (en) 2011-02-02 2016-07-19 Salzgitter Flachstahl Gmbh Process and device for producing a cast strip with material properties which are adjustable over the strip cross section
US9593392B2 (en) 2010-03-16 2017-03-14 Salzgitter Flachstahl Gmbh Method for producing workpieces from lightweight steel having material properties that are adjustable across the wall thickness
US9630243B2 (en) 2012-07-03 2017-04-25 Sms Group Gmbh Continuously operating strip casting and rolling system
US9677146B2 (en) 2008-11-12 2017-06-13 Voestalpine Stahl Gmbh Manganese steel strip having an increased phosphorous content and process for producing the same
US10214790B2 (en) 2013-05-06 2019-02-26 Salzgitter Flachstahl Gmbh Method for producing components from lightweight steel
US10253399B2 (en) * 2010-11-26 2019-04-09 Salzgitter Flachstahl Gmbh Method for producing an energy-storing container made of lightweight steel

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2208803A1 (de) * 2009-01-06 2010-07-21 ThyssenKrupp Steel Europe AG Höherfester, kaltumformbarer Stahl, Stahlflachprodukt, Verfahren zur Herstellung eines Stahlflachprodukts sowie Verwendung eines Stahlflachproduktes
WO2013124283A1 (de) * 2012-02-25 2013-08-29 Technische Universität Bergakademie Freiberg Verfahren zur herstellung hochfester formteile aus hochkohlenstoff- und hochmanganhaltigem austenitischem stahlguss mit trip/twip-eigenschaften
CN103667883B (zh) * 2013-12-26 2017-01-11 北京科技大学 一种低密度、高强韧汽车用钢板及制备工艺
CN103667885B (zh) * 2013-12-31 2015-11-25 深圳市晶莱新材料科技有限公司 一种用于医学领域含Pt纳米孪晶钢及其制备方法
RU2615738C1 (ru) * 2016-02-08 2017-04-10 Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") Высокопрочная сталь системы Fe-Mn-Al-C, обладающая эффектом TWIP и TRIP
CN107475618B (zh) * 2017-07-11 2019-02-26 西南交通大学 一种高强韧低碳含铝中锰形变诱发塑性钢及制备方法
CN108707817B (zh) * 2018-05-02 2020-10-09 北京科技大学 一种挖掘机斗齿及具有该斗齿的挖掘机
CN113549840A (zh) * 2021-06-29 2021-10-26 鞍钢股份有限公司 一种780MPa级的高强塑积Fe-Mn-Al-C系轻质钢及其制备方法
CN115216703B (zh) * 2022-06-24 2023-02-28 燕山大学 一种超高强度低密度钢及其制备方法
CN116356233A (zh) * 2023-04-11 2023-06-30 重庆大学 一种利用形变孪晶提高锆合金抗氢脆性能的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0483852A (ja) * 1990-07-26 1992-03-17 High Frequency Heattreat Co Ltd 高マンガン鋼材および該高マンガン鋼材の製造方法
JPH05255813A (ja) * 1991-12-24 1993-10-05 Nippon Steel Corp 加工性と制振性能に優れた高強度合金
DE19727759C2 (de) 1997-07-01 2000-05-18 Max Planck Inst Eisenforschung Verwendung eines Leichtbaustahls
DE10128544C2 (de) * 2001-06-13 2003-06-05 Thyssenkrupp Stahl Ag Höherfestes, kaltumformbares Stahlblech, Verfahren zu seiner Herstellung und Verwendung eines solchen Blechs
EP1430161B1 (de) * 2001-09-28 2005-06-15 DaimlerChrysler AG Hochfester duplex-/triplex-leichtbaustahl und seine verwendung
DE102004061284A1 (de) * 2003-12-23 2005-07-28 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen von Warmbändern aus Leichtbaustahl
DE102005052774A1 (de) * 2004-12-21 2006-06-29 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen von Warmbändern aus Leichtbaustahl

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9677146B2 (en) 2008-11-12 2017-06-13 Voestalpine Stahl Gmbh Manganese steel strip having an increased phosphorous content and process for producing the same
US8852356B2 (en) 2009-03-11 2014-10-07 Salzgitter Glachstahl GmbH Method for producing a hot rolled strip and hot rolled strip produced from ferritic steel
US9593392B2 (en) 2010-03-16 2017-03-14 Salzgitter Flachstahl Gmbh Method for producing workpieces from lightweight steel having material properties that are adjustable across the wall thickness
US10253399B2 (en) * 2010-11-26 2019-04-09 Salzgitter Flachstahl Gmbh Method for producing an energy-storing container made of lightweight steel
US9393615B2 (en) 2011-02-02 2016-07-19 Salzgitter Flachstahl Gmbh Process and device for producing a cast strip with material properties which are adjustable over the strip cross section
WO2012171530A1 (en) * 2011-06-17 2012-12-20 National Oilwell Varco Denmark I/S An unbonded flexible pipe
EP2721334A1 (de) * 2011-06-17 2014-04-23 National Oilwell Varco Denmark I/S Unverbundener schlauch
EP2721334A4 (de) * 2011-06-17 2015-04-22 Nat Oilwell Varco Denmark Is Unverbundener schlauch
US10001228B2 (en) 2011-06-17 2018-06-19 National Oilwell Varco Denmark I/S Unbonded flexible pipe
US9630243B2 (en) 2012-07-03 2017-04-25 Sms Group Gmbh Continuously operating strip casting and rolling system
US10214790B2 (en) 2013-05-06 2019-02-26 Salzgitter Flachstahl Gmbh Method for producing components from lightweight steel

Also Published As

Publication number Publication date
AU2006332301B2 (en) 2011-07-28
DE202005021771U1 (de) 2010-02-18
RU2008129694A (ru) 2010-01-27
EP1969151A1 (de) 2008-09-17
KR20080081969A (ko) 2008-09-10
AU2006332301A1 (en) 2007-07-12
CN101405420A (zh) 2009-04-08
UA88994C2 (ru) 2009-12-10
EP1969151B1 (de) 2014-02-26
WO2007076748A1 (de) 2007-07-12
ZA200805306B (en) 2009-04-29
RU2430184C2 (ru) 2011-09-27
DE102005062221B3 (de) 2007-05-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SALZGITTER FLACHSTAHL GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SPITZER, KARL-HEINZ;EICHHOLZ, HELLFRIED;SPRINGUB, BIANCA;AND OTHERS;REEL/FRAME:021749/0169

Effective date: 20080623

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION