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US20100189591A1 - Steel for producing machine components formed from solid stock - Google Patents

Steel for producing machine components formed from solid stock Download PDF

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Publication number
US20100189591A1
US20100189591A1 US12/733,312 US73331208A US2010189591A1 US 20100189591 A1 US20100189591 A1 US 20100189591A1 US 73331208 A US73331208 A US 73331208A US 2010189591 A1 US2010189591 A1 US 2010189591A1
Authority
US
United States
Prior art keywords
component according
accelerated
controlled cooling
forming heat
heat amounts
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
US12/733,312
Inventor
Roman Diederichs
Axel Stueber
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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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40149548&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20100189591(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Georgsmarienhuette GmbH filed Critical Georgsmarienhuette GmbH
Assigned to GEORGSMARIENHUETTE GMBH reassignment GEORGSMARIENHUETTE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DIEDERICHS, ROMAN, LANGE, ROBERT, STUEBER, AXEL
Publication of US20100189591A1 publication Critical patent/US20100189591A1/en
Abandoned legal-status Critical Current

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
    • 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
    • C22C38/02—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
    • C22C38/18—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 and to a processing method for the production of solidly formed machine components, particularly for vehicle construction, with a predominantly bainitic structure.
  • the chemical composition has the following contents, in weight percent:
  • a particularly advantageous composition is given by claim 2 , whereby:
  • a use of this steel, according to the invention, is given in the production of machine components, particularly for vehicle construction, whereby such components, after forging in a die and after accelerated, controlled cooling have a bainitic structure, to a great extent, with precipitates of special carbides and/or nitrides.
  • the yield strength after accelerated, controlled cooling from the forming heat amounts to above 620 N/mm 2 .
  • the tensile strength after accelerated, controlled cooling from the forming heat is supposed to amount to between 800 N/mm 2 and 1100 N/mm 2 , according to claim 5 .
  • the yield strength ratio after accelerated, controlled cooling from the forming heat amounts to above 70%.
  • the ultimate elongation after accelerated, controlled cooling from the forming heat amounts to above 10%.
  • the ultimate constriction after accelerated, controlled cooling from the forming heat amounts to above 40%.
  • the notched-bar impact bending value (DVM notch, room temperature) after accelerated, controlled cooling from the forming heat is supposed to amount to above 25 J.
  • the impact strength characteristics can be adjusted by means of stepped cooling, at a high cooling velocity, at first, and a holding stage in the bainitic range, or subsequent aging treatment.
  • the component is supposed to be suitable for case hardening and carbonitration.

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

The invention relates to a steel and a processing method for producing machine components formed from solid stock, particularly for vehicle construction, having a primarily bainitic structure, characterized in that the chemical composition thereof has the following contents in weight percent: 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%, with the remainder being iron and the steel making-related accompanying elements and residual materials.

Description

  • The invention relates to a steel and to a processing method for the production of solidly formed machine components, particularly for vehicle construction, with a predominantly bainitic structure.
  • In this connection, it is provided, according to the invention, that the chemical composition has the following contents, in weight percent:
  •
     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%
  • whereby the remainder consists of iron and the melting-related accompanying elements and residual substances.
  • A particularly advantageous composition is given by claim 2, whereby:
  •
     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%
  • whereby the remainder consists of iron and the melting-related accompanying elements and residual substances.
  • A use of this steel, according to the invention, is given in the production of machine components, particularly for vehicle construction, whereby such components, after forging in a die and after accelerated, controlled cooling have a bainitic structure, to a great extent, with precipitates of special carbides and/or nitrides.
  • In the case of components produced in this manner, according to claim 4, it is provided that the yield strength after accelerated, controlled cooling from the forming heat amounts to above 620 N/mm2.
  • In this connection, the tensile strength after accelerated, controlled cooling from the forming heat is supposed to amount to between 800 N/mm2 and 1100 N/mm2, according to claim 5.
  • Preferably, the yield strength ratio after accelerated, controlled cooling from the forming heat amounts to above 70%.
  • According to claim 7, it is provided that the ultimate elongation after accelerated, controlled cooling from the forming heat amounts to above 10%.
  • According to claim 8, it is provided that the ultimate constriction after accelerated, controlled cooling from the forming heat amounts to above 40%.
  • According to claim 9, the notched-bar impact bending value (DVM notch, room temperature) after accelerated, controlled cooling from the forming heat is supposed to amount to above 25 J.
  • According to claim 10, it is proposed that the impact strength characteristics can be adjusted by means of stepped cooling, at a high cooling velocity, at first, and a holding stage in the bainitic range, or subsequent aging treatment.
  • According to claim 11, the component is supposed to be suitable for case hardening and carbonitration.
  • Finally, the mechanical properties both in the rolled pre-material for forging and in the forged components are supposed to be adjusted by means of thermomechanical treatment.

Claims (12)

1. Steel and processing method for the production of solidly formed machine components, particularly for vehicle construction, with a predominantly bainitic structure, wherein its chemical composition has the following contents, in weight percent:
 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%
whereby the remainder consists of iron and the melting-related accompanying elements and residual substances.
2. Steel according to claim 1, wherein its chemical composition is such that the following applies:
 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%
whereby the remainder consists of iron and the melting-related accompanying elements and residual substances.
3. Use of a steel according to claim 2 for the production of machine components, particularly for vehicle construction, which components, after forging in a die and after accelerated, controlled cooling, have a bainitic structure, to a great extent, with precipitates of special carbides and/or nitrides.
4. Component according to claim 3, wherein the yield strength after accelerated, controlled cooling from the forming heat amounts to above 620 N/mm2.
5. Component according to claim 4, wherein the tensile strength after accelerated, controlled cooling from the forming heat amounts to between 800 N/mm2 and 1100 N/mm2.
6. Component according to claim 5, wherein the yield strength ratio after accelerated, controlled cooling from the forming heat amounts to above 70%.
7. Component according to claim 6, wherein the ultimate elongation after accelerated, controlled cooling from the forming heat amounts to above 10%.
8. Component according to claim 7, wherein the ultimate constriction after accelerated, controlled cooling from the forming heat amounts to above 40%.
9. Component according to claim 8, wherein the notched-bar impact bending value (DVM notch, room temperature) after accelerated, controlled cooling from the forming heat amounts to above 25 J.
10. Component according to claim 9, wherein the impact strength characteristics can be adjusted by means of stepped cooling, at a high cooling velocity, at first, and a holding stage in the bainitic range, or subsequent aging treatment.
11. Component according to claim 10, wherein it is supposed to be suitable for case hardening and carbonitration.
12. Component according to claim 11, wherein the mechanical properties both in the rolled pre-material and in the forged component can be adjusted by means of thermomechanical treatment.
US12/733,312 2007-08-27 2008-08-12 Steel for producing machine components formed from solid stock Abandoned US20100189591A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007040616.0 2007-08-27
DE102007040616 2007-08-27
PCT/DE2008/001319 WO2009026881A1 (en) 2007-08-27 2008-08-12 Steel for producing machine components formed from solid stock

Publications (1)

Publication Number Publication Date
US20100189591A1 true US20100189591A1 (en) 2010-07-29

Family

ID=40149548

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/733,312 Abandoned US20100189591A1 (en) 2007-08-27 2008-08-12 Steel for producing machine components formed from solid stock

Country Status (16)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113025777A (en) * 2021-03-02 2021-06-25 攀钢集团江油长城特殊钢有限公司 30CrNi2MoVA large-size forged material and preparation method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5620336B2 (en) * 2011-05-26 2014-11-05 新日鐵住金株式会社 Steel parts for high fatigue strength and high toughness machine structure and manufacturing method thereof
CN106661691B (en) * 2014-07-29 2018-07-24 新日铁住金株式会社 Carbo-nitriding bearing steel
JP2016145380A (en) * 2015-02-06 2016-08-12 株式会社神戸製鋼所 Steel for large sized forging and large sized forging component

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040048217A1 (en) * 2002-04-30 2004-03-11 Sanyo Special Steel Co.,Ltd. Process for producing steel products having improved grain size properties and machinability

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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 (en) * 1985-06-05 1986-12-10 Daido Steel Co Ltd Non-thermal steel for hot forging
JPH05148535A (en) * 1991-06-07 1993-06-15 Kobe Steel Ltd Production of surface hardened parts having decreased heat treating strain and excellent bending fatigue strength
JPH09170047A (en) * 1995-12-16 1997-06-30 Daido Steel Co Ltd High strength-high toughness bainite type non-heat treated steel and manufacturing method thereof
CZ293084B6 (en) * 1999-05-17 2004-02-18 Jinpo Plus A. S. Steel for creep-resisting and high-strength wrought parts, particularly pipes, plates and forgings
JP2000345281A (en) * 1999-06-02 2000-12-12 Nippon Steel Corp Low alloy heat-resistant steel excellent in weldability and low-temperature toughness and its manufacturing method
DE102005052069B4 (en) * 2005-10-28 2015-07-09 Saarstahl Ag Process for the production of semi-finished steel by hot working

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040048217A1 (en) * 2002-04-30 2004-03-11 Sanyo Special Steel Co.,Ltd. Process for producing steel products having improved grain size properties and machinability

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113025777A (en) * 2021-03-02 2021-06-25 攀钢集团江油长城特殊钢有限公司 30CrNi2MoVA large-size forged material and preparation method thereof

Also Published As

Publication number Publication date
ATE537274T1 (en) 2011-12-15
ES2378353T3 (en) 2012-04-11
MX2010002282A (en) 2010-03-29
EP2183396B1 (en) 2011-12-14
CA2697794A1 (en) 2009-03-05
EA017741B1 (en) 2013-02-28
WO2009026881A1 (en) 2009-03-05
KR20100057823A (en) 2010-06-01
AU2008291431A1 (en) 2009-03-05
AR067684A1 (en) 2009-10-21
DE102007057421A1 (en) 2009-03-05
JP2010537054A (en) 2010-12-02
EP2183396A1 (en) 2010-05-12
EA201070313A1 (en) 2010-08-30
CN101821413A (en) 2010-09-01
TW200927954A (en) 2009-07-01
ZA201001002B (en) 2010-10-27

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Owner name: GEORGSMARIENHUETTE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DIEDERICHS, ROMAN;STUEBER, AXEL;LANGE, ROBERT;SIGNING DATES FROM 20100215 TO 20100217;REEL/FRAME:023995/0617

STCB Information on status: application discontinuation

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