EP2183396B1 - Acier pour produire des composants de machines mis en forme à l'état solide - Google Patents

Acier pour produire des composants de machines mis en forme à l'état solide Download PDF

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Publication number
EP2183396B1
EP2183396B1 EP08801149A EP08801149A EP2183396B1 EP 2183396 B1 EP2183396 B1 EP 2183396B1 EP 08801149 A EP08801149 A EP 08801149A EP 08801149 A EP08801149 A EP 08801149A EP 2183396 B1 EP2183396 B1 EP 2183396B1
Authority
EP
European Patent Office
Prior art keywords
accordance
component
steel
controlled cooling
cooling down
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.)
Revoked
Application number
EP08801149A
Other languages
German (de)
English (en)
Other versions
EP2183396A1 (fr
Inventor
Roman Diederichs
Axel STÜBER
Robert Lange
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.)
Georgsmarienhuette GmbH
Original Assignee
Georgsmarienhuette 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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Application filed by Georgsmarienhuette GmbH filed Critical Georgsmarienhuette GmbH
Publication of EP2183396A1 publication Critical patent/EP2183396A1/fr
Application granted granted Critical
Publication of EP2183396B1 publication Critical patent/EP2183396B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C22C38/02—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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Definitions

  • the invention relates to a steel for producing massively formed machine components, in particular for vehicle construction, with a predominantly bainitic structure.
  • the chemical composition has the following contents by weight: 0.10% ⁇ C ⁇ 0.25% 0.15% ⁇ Si ⁇ 0.40% 1.00% ⁇ Mn ⁇ 1.50% 1.00% ⁇ Cr ⁇ 2.00% 0.20% ⁇ Ni ⁇ 0.40% 0.05% ⁇ Mo ⁇ 0.20% 0.010% ⁇ Nb ⁇ 0.040% 0.05% ⁇ V ⁇ 0.25% 0.01% ⁇ Al ⁇ 0.05% 0.005% ⁇ N ⁇ 0.025% 0% ⁇ B ⁇ 0.0050% the remainder being iron and the meltdown-related contaminants.
  • a particularly advantageous composition of the steel is given by claim 2, wherein: 0.10% ⁇ C ⁇ 0.20% 0.20% ⁇ Si ⁇ 0.30% 1.00% ⁇ Mn ⁇ 1.50% 1.50% ⁇ Cr ⁇ 2.00% 0.20% ⁇ Ni ⁇ 0.40% 0.05% ⁇ Mo ⁇ 0.20% 0.020% ⁇ Nb ⁇ 0.040% 0.05% ⁇ V ⁇ 0.20% 0.01% ⁇ Al ⁇ 0.05% 0.005% ⁇ N ⁇ 0.025% the remainder being iron and the contaminants due to melting.
  • the yield strength after accelerated controlled cooling from the forming heat is above 620 N / mm 2 .
  • the tensile strength should be according to claim 5 after an accelerated, controlled cooling from the forming heat between 800 N / mm 2 and 1100 N / mm 2 .
  • the yield ratio after accelerated, controlled cooling from the forming heat over 70%.
  • the elongation at break after an accelerated, controlled cooling from the forming heat is over 10%.
  • the Brucheinschnürung after an accelerated, controlled cooling from the forming heat is over 40%.
  • the notched-bar bending work (DVM notch, room temperature) after an accelerated, controlled cooling from the Umformmaschine over 25 J.
  • the toughness characteristics can be adjusted by a stepped cooling with first high cooling rate and a holding stage in the bainite range or a subsequent aging treatment.
  • the component should be suitable for case hardening and carbonitriding according to claim 11.
  • thermo-mechanical treatment the mechanical properties in both the rolled forging stock and in the forged component by a thermo-mechanical treatment can be adjusted.

Landscapes

  • 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 Steel (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un acier et un procédé de traitement associé pour la fabrication de pièces de machines mises en forme à l'état solide et utilisées en particulier dans la construction automobile, principalement sous forme bainitique. L'invention est caractérisée en ce que, sa composition chimique présente les teneurs suivantes exprimées en pour cent en poids: 0,10% ≤ C ≤ 0,25%, 0,15% ≤ Si ≤ 0,40%, 1,00% ≤ Mn ≤ 1,50%, 1,00% ≤ Cr ≤ 2,00%, 0,20% ≤ Ni ≤ 0,40%, 0,05% ≤ Mo ≤ 0,20%, 0,010% ≤ Nb ≤ 0,040%, 0,05% ≤ V ≤ 0,25%, 0,01 % ≤ Al ≤ 0,05%, 0,005% ≤ N ≤ 0,025%, 0% ≤ B ≤ 0,0050%, le reste étant composé de fer, et d'impuretés et de sous-produits résultant de la fusion de l'acier.

Claims (12)

  1. Acier pour la fabrication de pièces de machines massives formées, en particulier pour la construction de véhicules, avec une structure essentiellement bainitique, qui est caractérisé en ce que sa composition chimique présente en pourcentages en poids les teneurs suivantes : 0,10 % ≤ C ≤ 0,25 % 0,15 % ≤ Si ≤ 0,40 % 1,00 % ≤ Mn ≤ 1,50 % 1,00 % ≤ Cr ≤ 2,00 % 0,20 % ≤ Ni ≤ 0,40 % 0,05 % ≤ Mo ≤ 0,20 % 0,010 % ≤ Nb ≤ 0,040 % 0,05 % ≤ V ≤ 0,25 % 0,01 % ≤ Al ≤ 0,05 % 0,005 % ≤ N ≤ 0,025 % 0 % ≤ B ≤ 0,0050 %
    le reste étant constitué de fer et des impuretés inévitables de fusion.
  2. Acier selon la revendication 1, caractérisé en ce que sa composition chimique est telle que l'on a : 0,10 % ≤ C ≤ 0,20 % 0,20 % ≤ Si ≤ 0,30 % 1,00 % ≤ Mn ≤ 1,50 % 1,50 % ≤ Cr ≤ 2,00 % 0,20 % ≤ Ni ≤ 0,40 % 0,05 % ≤ Mo ≤ 0,20 % 0,020 % ≤ Nb ≤ 0,040 % 0,05 % ≤ V ≤ 0,20 % 0,01 % ≤ Al ≤ 0,05 % 0,005 % ≤ N ≤ 0,025 %
    le reste étant constitué de fer et des impuretés inévitables de fusion.
  3. Utilisation d'un acier selon la revendication 2 pour la fabrication de pièces de construction de machines, en particulier pour la construction de véhicules qui, après le forgeage par matriçage et un refroidissement accéléré contrôlé, présentent une structure essentiellement bainitique avec des précipités de carbures spéciaux, respectivement de nitrures.
  4. Pièce de construction selon la revendication 3, caractérisée en ce que la limite apparente d'élasticité après un refroidissement accéléré contrôlé partant de la chaleur de formage est supérieure à 620 N/mm2.
  5. Pièce de construction selon la revendication 4, caractérisée en ce que la résistance à la traction après un refroidissement accéléré contrôlé partant de la chaleur de formage est comprise entre 800 N/mm2 et 1100 N/mm2 .
  6. Pièce de construction selon la revendication 5, caractérisée en ce que le rapport de limite apparente d'élasticité après un refroidissement accéléré contrôlé partant de la chaleur de formage est de plus de 70 %.
  7. Pièce de construction selon la revendication 6, caractérisée en ce que l'allongement à la rupture après un refroidissement accéléré contrôlé partant de la chaleur de formage est de plus de 10 %.
  8. Pièce de construction selon la revendication 7, caractérisée en ce que la striction à la rupture après un refroidissement accéléré contrôlé partant de la chaleur de formage est de plus de 40 %.
  9. Pièce de construction selon la revendication 8, caractérisée en ce que l'énergie de flexion au choc sur entaille (entaille selon le DVM, température ambiante) après un refroidissement accéléré contrôlé partant de la chaleur de formage est de plus de 25 J.
  10. Pièce de construction selon la revendication 9, caractérisée en ce que les valeurs de résilience peuvent être ajustées par un refroidissement étagé avec d'abord une grande vitesse de refroidissement, puis par une étape d'arrêt dans la plage de la bainite ou par un traitement consécutif de vieillissement.
  11. Pièce de construction selon la revendication 10, caractérisée en ce qu'elle convient à une cémentation ou à une carbonitruration.
  12. Pièce de construction selon la revendication 11, caractérisée en ce que les propriétés mécaniques, aussi bien dans le matériau laminé préliminaire de forgeage que dans la pièce forgée, peuvent être ajustées par un traitement thermomécanique.
EP08801149A 2007-08-27 2008-08-12 Acier pour produire des composants de machines mis en forme à l'état solide Revoked EP2183396B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007040616 2007-08-27
PCT/DE2008/001319 WO2009026881A1 (fr) 2007-08-27 2008-08-12 Acier pour produire des pièces de machines mises en forme à l'état solide

Publications (2)

Publication Number Publication Date
EP2183396A1 EP2183396A1 (fr) 2010-05-12
EP2183396B1 true EP2183396B1 (fr) 2011-12-14

Family

ID=40149548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08801149A Revoked EP2183396B1 (fr) 2007-08-27 2008-08-12 Acier pour produire des composants de machines mis en forme à l'état solide

Country Status (16)

Country Link
US (1) US20100189591A1 (fr)
EP (1) EP2183396B1 (fr)
JP (1) JP2010537054A (fr)
KR (1) KR20100057823A (fr)
CN (1) CN101821413A (fr)
AR (1) AR067684A1 (fr)
AT (1) ATE537274T1 (fr)
AU (1) AU2008291431A1 (fr)
CA (1) CA2697794A1 (fr)
DE (1) DE102007057421A1 (fr)
EA (1) EA017741B1 (fr)
ES (1) ES2378353T3 (fr)
MX (1) MX2010002282A (fr)
TW (1) TW200927954A (fr)
WO (1) WO2009026881A1 (fr)
ZA (1) ZA201001002B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5620336B2 (ja) * 2011-05-26 2014-11-05 新日鐵住金株式会社 高疲労強度、高靭性機械構造用鋼部品およびその製造方法
CN106661691B (zh) * 2014-07-29 2018-07-24 新日铁住金株式会社 碳氮共渗轴承用钢
JP2016145380A (ja) * 2015-02-06 2016-08-12 株式会社神戸製鋼所 大型鍛造用鋼及び大型鍛造部品
CN113025777A (zh) * 2021-03-02 2021-06-25 攀钢集团江油长城特殊钢有限公司 一种30CrNi2MoVA大规格锻材及其制备方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328211A (en) * 1963-12-05 1967-06-27 Ishikawajima Harima Heavy Ind Method of manufacturing weldable, tough and high strength steel for structure members usable in the ashot-state and steel so made
JPS61279656A (ja) * 1985-06-05 1986-12-10 Daido Steel Co Ltd 熱間鍛造用非調質鋼
JPH05148535A (ja) * 1991-06-07 1993-06-15 Kobe Steel Ltd 熱処理歪が少なく曲げ疲労強度の優れた表面硬化部品の製造方法
JPH09170047A (ja) * 1995-12-16 1997-06-30 Daido Steel Co Ltd 高強度−高靱性ベイナイト型非調質鋼及びその製造方法
CZ293084B6 (cs) * 1999-05-17 2004-02-18 Jinpo Plus A. S. Ocele pro žárupevné a vysokopevné tvářené součásti, obzvláště trubky, plechy a výkovky
JP2000345281A (ja) * 1999-06-02 2000-12-12 Nippon Steel Corp 溶接性と低温靭性に優れた低合金耐熱鋼およびその製造方法
US7081174B2 (en) * 2002-04-30 2006-07-25 Sanyo Special Steel Co., Ltd. Process for producing steel products having improved grain size properties and machinability
DE102005052069B4 (de) * 2005-10-28 2015-07-09 Saarstahl Ag Verfahren zum Herstellen von Vormaterial aus Stahl durch Warmverformen

Also Published As

Publication number Publication date
ES2378353T3 (es) 2012-04-11
MX2010002282A (es) 2010-03-29
EA201070313A1 (ru) 2010-08-30
WO2009026881A1 (fr) 2009-03-05
ZA201001002B (en) 2010-10-27
KR20100057823A (ko) 2010-06-01
AR067684A1 (es) 2009-10-21
EP2183396A1 (fr) 2010-05-12
ATE537274T1 (de) 2011-12-15
CA2697794A1 (fr) 2009-03-05
TW200927954A (en) 2009-07-01
CN101821413A (zh) 2010-09-01
AU2008291431A1 (en) 2009-03-05
JP2010537054A (ja) 2010-12-02
DE102007057421A1 (de) 2009-03-05
US20100189591A1 (en) 2010-07-29
EA017741B1 (ru) 2013-02-28

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