EP2994548A1 - Procédé de fabrication de pièces en acier léger - Google Patents

Procédé de fabrication de pièces en acier léger

Info

Publication number
EP2994548A1
EP2994548A1 EP13730795.5A EP13730795A EP2994548A1 EP 2994548 A1 EP2994548 A1 EP 2994548A1 EP 13730795 A EP13730795 A EP 13730795A EP 2994548 A1 EP2994548 A1 EP 2994548A1
Authority
EP
European Patent Office
Prior art keywords
forming
trip
temperature
components
room temperature
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
EP13730795.5A
Other languages
German (de)
English (en)
Other versions
EP2994548B1 (fr
Inventor
Thomas Evertz
Manuel Otto
Bianca Springub
Zacharias Georgeou
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
Application filed by Salzgitter Flachstahl GmbH filed Critical Salzgitter Flachstahl GmbH
Publication of EP2994548A1 publication Critical patent/EP2994548A1/fr
Application granted granted Critical
Publication of EP2994548B1 publication Critical patent/EP2994548B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C21D6/04—Hardening by cooling below 0 degrees Celsius
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation

Definitions

  • the invention relates to a method for the production of components made of lightweight steel according to the preamble of claim 1.
  • the z. B. from ribbons, sheets or tubes are formed by deformation and, for example, in areas of mechanical engineering, plant, steel and shipbuilding, and in particular in automotive z. B. for body or chassis components application.
  • Vehicle components on the other hand, but also a passive safety of the passengers promoting behavior of the individual components with high static and dynamic stresses during operation and in the event of a crash.
  • the individual components must meet a variety of requirements in terms of strength, toughness, wear resistance, etc.
  • airbag holders which must have a very high degree of toughness in order to be able to absorb the introduced energy in the event of a sudden load.
  • Si is 0.05 to 6.0
  • Requirement Cr, Cu, Ti, Zr, V and Nb are added.
  • This known lightweight steel has a partially stabilized mixed crystal structure with defined stacking fault energy with a z. T. multiple TRIP effect, which transforms the stress- or strain-induced transformation of a face-centered mixed crystal (austenite) into a -Martensit (hexagonal closest packing), which then transforms on further deformation in a body-centered -Martensit and Restaustenit.
  • the high degree of deformation is achieved by TRIP (Transformation Induced Plasticity) and TWIP (Twinning Induced Plasticity) properties of the steel.
  • the object of the invention is to provide a method for producing components made of metastable austenitic lightweight structural steel with TRIP and TWIP properties, with which it is possible in a simple and cost-effective manner to produce using a material components that meet different requirements in the operating condition can be.
  • the forming at a TRIP- / TWIP effect avoiding temperature above room temperature, at 40 to 160 ° C, and to achieve in particular a high component strength, the forming at a den TRIP / TWIP effect reinforcing temperature below room temperature, at -65 to 0 ° C, made.
  • Room temperature is understood below to mean a temperature range of 19 ° C to 27 ° C.
  • the essence of the invention is to adjust the required forming temperatures according to the requirements of the component. Is used while the
  • the sheets, circuit boards or tubes used for the production of the components can be provided in accordance with the invention with metallic blank or with a metallic coating.
  • the TRIP effect is based on the difference between the free energies of the individual phases. If the difference of the energies is exceeded by the forming energy, the structure works accordingly.
  • the ⁇ phase at room temperature is the stable phase, but it has a very low energy difference to the a- or ⁇ -phase ( Figure).
  • the TRIP effect can be intensified at low temperatures, since the energy to be overcome is low. If the forming is carried out at temperatures above room temperature, the austenite stabilizes, since the energy to be overcome increases sharply.
  • the resulting in the forming temperature increase in the component can be used selectively.
  • the component undergoes an increase in temperature from about room temperature to about 40 to 160 ° C.
  • refrigeration is now dispensed with according to the invention or a tempering of the tools to 40 to 160 ° C. is deliberately carried out. In this way, components are produced which have a stable austenitic structure with high ductility.
  • the conversion to a component should therefore be carried out at temperatures of about 40-160 ° C and to achieve a high component strength between about -65 and 0 ° C.
  • the high forming capacity of austenitic materials can be optimized without the additional addition of alloying elements by using a
  • Multi-stage forming process in the first forming stages of the TRIP or TWIP effect is suppressed and so before the last forming stage still the forming capacity of the base material is present.
  • low-temperature forming can favor the TRIP or TWIP effect. So can also without adding more
  • Alloy elements component strength can be increased.
  • the deformation in the first stage or in further stages may be done at a deformation-induced TRIP / TWIP effect above room temperature to maintain the ductility of the starting material and in the final stage, the transformation may be carried out at a TRIP / TWIP Effect enhancing temperature below room temperature to produce a high strength component.
  • the forming takes place in several stages, wherein in the individual stages, the forming temperature and / or the degree of deformation and / or the deformation rate can be varied.
  • the component in the different transformation stages very different material characteristics can be impressed, which offers a variety of ways to meet different component requirements.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Steel (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de fabrication de pièces à partir d'un acier léger austénitique métastable dans son état initial par déformation d'une tôle, d'un larget ou d'un tube en une ou plusieurs étapes, ledit acier présentant un effet TRIP et/ou TWIP dépendant de la température lors de la déformation. Pour permettre l'obtention d'une pièce présentant en particulier une haute ténacité, la déformation est réalisée à une température évitant l'effet TRIP/TWIP supérieure à la température ambiante et comprise entre 40 et 160 °C et, pour permettre l'obtention d'une pièce en particulier de haute résistance, la déformation est réalisée à une température renforçant l'effet TRIP/TWIP inférieure à la température ambiante et comprise entre -65 et 0 °C.
EP13730795.5A 2013-05-06 2013-05-06 Procédé de fabrication de pièces en acier léger Active EP2994548B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2013/000266 WO2014180456A1 (fr) 2013-05-06 2013-05-06 Procédé de fabrication de pièces en acier léger

Publications (2)

Publication Number Publication Date
EP2994548A1 true EP2994548A1 (fr) 2016-03-16
EP2994548B1 EP2994548B1 (fr) 2022-10-26

Family

ID=48672312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13730795.5A Active EP2994548B1 (fr) 2013-05-06 2013-05-06 Procédé de fabrication de pièces en acier léger

Country Status (5)

Country Link
US (1) US10214790B2 (fr)
EP (1) EP2994548B1 (fr)
KR (1) KR101749201B1 (fr)
RU (1) RU2631219C2 (fr)
WO (1) WO2014180456A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018083028A1 (fr) * 2016-11-02 2018-05-11 Salzgitter Flachstahl Gmbh Tube sans soudure en acier au manganèse moyen et procédé de fabrication

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3095889A1 (fr) 2015-05-22 2016-11-23 Outokumpu Oyj Procédé de fabrication d'un composant en acier austénitique
TR201808389T4 (tr) 2015-07-16 2018-07-23 Outokumpu Oy Ostenitli twip veya trip/twip çeliği bileşeni üretimi için metod.
DE102015111680A1 (de) * 2015-07-17 2017-01-19 Benteler Steel/Tube Gmbh Gasgenerator
DE102015112215A1 (de) * 2015-07-27 2017-02-02 Salzgitter Flachstahl Gmbh Hochlegierter Stahl insbesondere zur Herstellung von mit Innenhochdruck umgeformten Rohren und Verfahren zur Herstellung derartiger Rohre aus diesem Stahl
EP3173504A1 (fr) 2015-11-09 2017-05-31 Outokumpu Oyj Procédé de fabrication d'un composant d'acier austenitique et utilisation dudit composant
DE102016104800A1 (de) * 2016-03-15 2017-09-21 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines warmumgeformten Stahlbauteils und ein warmumgeformtes Stahlbauteil
DE102016110661A1 (de) * 2016-06-09 2017-12-14 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines kaltgewalzten Stahlbandes aus einem hochfesten, manganhaltigen Stahl
CN109642263B (zh) * 2016-08-23 2021-02-26 德国沙士基达板材有限公司 一种用于制造在进一步加工过程中具有改进性能的高强度钢带的方法以及这种钢带
DE102016117502A1 (de) * 2016-09-16 2018-03-22 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines Warm- oder Kaltbandes und/oder eines flexibel gewalzten Stahlflachprodukts aus einem hochfesten manganhaltigen Stahl und Stahlflachprodukt hiernach
DE102016117494A1 (de) 2016-09-16 2018-03-22 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines umgeformten Bauteils aus einem mittelmanganhaltigen Stahlflachprodukt und ein derartiges Bauteil
EP3512967A1 (fr) * 2016-09-16 2019-07-24 Salzgitter Flachstahl GmbH Procédé pour la fabrication d'une pièce façonnée en un produit plat en acier contenant du manganèse et pièce correspondante
MX2020009524A (es) 2018-03-13 2020-10-28 Ak Steel Properties Inc Reduccion a temperatura elevada de aceros recubiertos que contienen austenita metastable.

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US5431753A (en) * 1991-12-30 1995-07-11 Pohang Iron & Steel Co. Ltd. Manufacturing process for austenitic high manganese steel having superior formability, strengths and weldability
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EP1699582B1 (fr) * 2003-12-23 2013-12-11 Salzgitter Flachstahl GmbH Procede pour produire des feuillards a chaud a partir d'un acier leger
DE102004061284A1 (de) 2003-12-23 2005-07-28 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen von Warmbändern aus Leichtbaustahl
EP1807542A1 (fr) * 2004-11-03 2007-07-18 ThyssenKrupp Steel AG Bande ou tole d'acier extremement resistante a proprietes twip et procede de fabrication de ladite bande a l'aide de la "coulee directe de bandes"
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018083028A1 (fr) * 2016-11-02 2018-05-11 Salzgitter Flachstahl Gmbh Tube sans soudure en acier au manganèse moyen et procédé de fabrication
WO2018083029A1 (fr) * 2016-11-02 2018-05-11 Salzgitter Flachstahl Gmbh Tube fabriqué sans soudure et réalisé par formage à basse température en acier au manganèse moyen et procédé de fabrication

Also Published As

Publication number Publication date
WO2014180456A8 (fr) 2015-08-20
KR101749201B1 (ko) 2017-06-20
RU2631219C2 (ru) 2017-09-19
WO2014180456A1 (fr) 2014-11-13
US10214790B2 (en) 2019-02-26
EP2994548B1 (fr) 2022-10-26
RU2015152135A (ru) 2017-06-13
US20160122839A1 (en) 2016-05-05
KR20160003744A (ko) 2016-01-11

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