[go: up one dir, main page]

EP1050591A3 - Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products - Google Patents

Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products Download PDF

Info

Publication number
EP1050591A3
EP1050591A3 EP00108714A EP00108714A EP1050591A3 EP 1050591 A3 EP1050591 A3 EP 1050591A3 EP 00108714 A EP00108714 A EP 00108714A EP 00108714 A EP00108714 A EP 00108714A EP 1050591 A3 EP1050591 A3 EP 1050591A3
Authority
EP
European Patent Office
Prior art keywords
cooling
unalloyed
elongated
workpiece
treatment process
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.)
Withdrawn
Application number
EP00108714A
Other languages
German (de)
French (fr)
Other versions
EP1050591A2 (en
Inventor
Meinert Meyer
Andreas Dr. Peters
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP1050591A2 publication Critical patent/EP1050591A2/en
Publication of EP1050591A3 publication Critical patent/EP1050591A3/en
Withdrawn legal-status Critical Current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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
    • 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
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/902—Metal treatment having portions of differing metallurgical properties or characteristics

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

Um Wärmebehandlungsverfahren zur Herstellung randschichtgehärteter Lang- oder Flachprodukte, umfassend die Schritte Abkühlen des Werkstücks auf eine Temperatur unterhalb der Martensitstarttemperatur und nachfolgendem langsamen Abkühlen des Kerns dahingehend zu verbessern, daß die Zähigkeitseigenschaften des Werkstücks verbessert werden, wird erfindungsgemäß vorgeschlagen, daß der erste Abkühlprozeß in mehreren, sich wiederholenden Schritten durchgeführt wird, wobei sich jeder Prozeßschritt aus einem Abkühlen auf eine Temperatur unterhalb der Martensitstarttemperatur zur martensitischen Umwandlung nur jeweils eines Teils des Werkstückrandbereichs und einer sich anschließenden zeitlichen Phase zur Entspannung der bereits gebildeten martensitischen Gefügteteile und/oder Randbereiche Martensit/Austenit zusammensetzt.

Figure 00000001
In order to improve heat treatment processes for the production of surface-hardened long or flat products, comprising the steps of cooling the workpiece to a temperature below the martensite start temperature and then slowly cooling the core in such a way that the toughness properties of the workpiece are improved, it is proposed according to the invention that the first cooling process in several , repetitive steps is carried out, each process step consisting of cooling to a temperature below the martensite start temperature for martensitic transformation of only a part of the workpiece edge area and a subsequent time phase for relaxation of the martensitic structural parts and / or edge areas already formed martensite / austenite ,
Figure 00000001
EP00108714A 1999-05-07 2000-04-22 Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products Withdrawn EP1050591A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19921286 1999-05-07
DE19921286A DE19921286A1 (en) 1999-05-07 1999-05-07 Heat treatment process for the production of surface-hardened long and flat products from unalloyed or low-alloy steels

Publications (2)

Publication Number Publication Date
EP1050591A2 EP1050591A2 (en) 2000-11-08
EP1050591A3 true EP1050591A3 (en) 2004-06-23

Family

ID=7907440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108714A Withdrawn EP1050591A3 (en) 1999-05-07 2000-04-22 Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products

Country Status (4)

Country Link
US (1) US6355119B1 (en)
EP (1) EP1050591A3 (en)
JP (1) JP2000328141A (en)
DE (1) DE19921286A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9132567B2 (en) * 2007-03-23 2015-09-15 Dayton Progress Corporation Tools with a thermo-mechanically modified working region and methods of forming such tools
US8968495B2 (en) * 2007-03-23 2015-03-03 Dayton Progress Corporation Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels
WO2009102848A1 (en) * 2008-02-15 2009-08-20 Dayton Progress Corporation Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels
US8518195B2 (en) * 2012-01-20 2013-08-27 GM Global Technology Operations LLC Heat treatment for producing steel sheet with high strength and ductility
CN106756504B (en) * 2016-12-28 2018-05-15 鞍钢集团（鞍山）铁路运输设备制造有限公司 A kind of ball grinding machine lining board and preparation method thereof
CN107480328B (en) * 2017-07-04 2022-09-20 山东建筑大学 Carbon distribution theory calculation method based on Q & P process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1351423A (en) * 1971-04-14 1974-05-01 Koninklijke Hoogovens En Staal Manufacture of profiled rod
US4016009A (en) * 1975-01-29 1977-04-05 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Producing rolled steel products
DE2916218A1 (en) * 1979-04-21 1980-10-23 Florin Stahl Walzwerk Rolled steel prods. with multilayer microstructure - where prod. leaving hot rolling mill is quenched intermittently to obtain several layers of tempered martensite
GB2087927A (en) * 1980-10-16 1982-06-03 Arbed Manufacture of rolled steel products having good weldability, a high elastic limit, and toughness at very low temperatures
US4877463A (en) * 1984-08-23 1989-10-31 Dyckerhoff & Widmann Aktiengesellschaft Method for producing rolled steel products, particularly threaded steel tension members

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4180418A (en) * 1973-09-11 1979-12-25 Stahlwerke Peine-Salzgitter A.G. Method of making a steel wire adapted for cold drawing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1351423A (en) * 1971-04-14 1974-05-01 Koninklijke Hoogovens En Staal Manufacture of profiled rod
US4016009A (en) * 1975-01-29 1977-04-05 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Producing rolled steel products
DE2916218A1 (en) * 1979-04-21 1980-10-23 Florin Stahl Walzwerk Rolled steel prods. with multilayer microstructure - where prod. leaving hot rolling mill is quenched intermittently to obtain several layers of tempered martensite
GB2087927A (en) * 1980-10-16 1982-06-03 Arbed Manufacture of rolled steel products having good weldability, a high elastic limit, and toughness at very low temperatures
US4877463A (en) * 1984-08-23 1989-10-31 Dyckerhoff & Widmann Aktiengesellschaft Method for producing rolled steel products, particularly threaded steel tension members

Also Published As

Publication number Publication date
JP2000328141A (en) 2000-11-28
DE19921286A1 (en) 2000-11-09
US6355119B1 (en) 2002-03-12
EP1050591A2 (en) 2000-11-08

Similar Documents

Publication Publication Date Title
US4448613A (en) Divorced eutectoid transformation process and product of ultrahigh carbon steels
ATE292194T1 (en) METHOD FOR PRODUCING PRODUCTS FROM PRECITATION HARDENED MARTENSITIC STAINLESS STEEL AND USE OF THE METHOD
JP4063865B2 (en) Manufacturing method of high strength steel structural members
KR950704521A (en) Process for producing hot forging steel with excellent fatigue strength, yield strength and cuttability
EP1050591A3 (en) Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products
Achary et al. Microstructural development and austempering kinetics of ductile iron during thermomechanical processing
EP0974676A3 (en) Process for thermo-mechanically treating steel for torsion spring elements
ATE361999T1 (en) FASTENING ELEMENT MADE OF A CARBON STEEL AND METHOD FOR PRODUCING IT
CN116536485A (en) Wear resistant high strength roll formed parts
DE60011666D1 (en) METHOD FOR PRODUCING ULTRAFINE GRAIN STRUCTURE FOR UNALLOYED OR LOW-ALLOY STEELS
JP2001294935A (en) Method of manufacturing tool steel with excellent toughness
JPH09225557A (en) Mold for plastic working and method for manufacturing the same
JP2002020849A (en) Method for working/heat-treating superelastic alloy
Barella et al. A leap into the beginning of the metal age: recrystallization and carburizing
SU460101A1 (en) The method of obtaining products
SU582305A1 (en) Method of heat and mechanical treatment of bimetallic articles
JPS5558330A (en) Heat treating method of steam turbine rotor shaft
JPS5852532B2 (en) Manufacturing method for tempered high-strength steel with excellent uniform elongation properties
KR0138441B1 (en) Surface hardening method of forged steel product
SU472985A1 (en) The method of processing steel
JPH0526064U (en) Compound steel cutlery
SU1184858A1 (en) Method of producing rolled sections
SU1611951A1 (en) Method of thermal treatment of articles of steels of perlite class
SU789606A1 (en) Method of thermal treatment of chrome-nickel austenite-martensite steels
SU515807A1 (en) Method of thermomechanical processing of dies

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000510

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7C 21D 1/02 -

Ipc: 7C 21D 1/78 B

Ipc: 7C 21D 8/08 B

Ipc: 7C 21D 1/06 B

Ipc: 7C 21D 1/19 A

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20041224