EP1528109A1 - Procédé de traitement thermique pour des aciers à teneur moyenne de carbone - Google Patents

Procédé de traitement thermique pour des aciers à teneur moyenne de carbone Download PDF

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Publication number
EP1528109A1
EP1528109A1 EP04090351A EP04090351A EP1528109A1 EP 1528109 A1 EP1528109 A1 EP 1528109A1 EP 04090351 A EP04090351 A EP 04090351A EP 04090351 A EP04090351 A EP 04090351A EP 1528109 A1 EP1528109 A1 EP 1528109A1
Authority
EP
European Patent Office
Prior art keywords
water
steels
steel
temperature
cooling
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Withdrawn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
EP04090351A
Other languages
German (de)
English (en)
Inventor
Ingo Von Hagen
Axel Kulgmeyer
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.)
Vodafone GmbH
Original Assignee
Mannesmannroehren Werke 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 Mannesmannroehren Werke AG filed Critical Mannesmannroehren Werke AG
Publication of EP1528109A1 publication Critical patent/EP1528109A1/fr
Withdrawn legal-status Critical Current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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents

Definitions

  • the invention relates to a method for heat treatment of carbonaceous steels, in particular of sheet metal or pipes, according to the preamble of claim 1.
  • sheet metal or tubes without special requirements delivered in the rolling condition can be used for higher requirements, eg. B. greater toughness, usually one the rolling subsequent separate heat treatment performed.
  • tempering a steel is meant a hardening with subsequent tempering.
  • the steel is usually heated to a defined temperature above Ac3 and then cooled to about room temperature. Subsequently, the hardened Steel tempered again to temperatures below the Ac1 point, there a certain Time kept and then cooled in air.
  • cooling media for quenching during the curing process come after the well-known State of the art, for example, water, water-surfactant mixtures, emulsions or oil used, which has different effects on the quenching intensity of the Have steel.
  • water as a cooling medium, wherein for controlling the cooling rate of the steel, the water-insoluble inorganic particles, for example made of ceramic material.
  • the particles should be a size from 0.01 to 0.1 microns.
  • the cooling rate can be controlled in a targeted manner so as to reduce the adverse effects of any eventuality great cooling rate on the steel or the workpiece to avoid.
  • the object of the invention is therefore to provide a process for heat treatment of carbonaceous Specify steels, in particular sheets or pipes, in the water as a cooling medium is used and the cooling conditions depending on the carbon content of the steel are controllable.
  • the setting range of the cooling water temperature is limited to 25 to 80 ° C. An increase in the Cooling water temperature above 80 ° C is possible, but the effect on the heat flux density ever smaller.
  • Another increase in the cooling water temperature z. B. to 80 ° C causes a reduction of the heat flux density and thus the cooling rate by an additional 20%.
  • the water temperature is set as a function of the C content of the steel. For C-contents of 0.30 to 0.39%, this range is 25 to 60 ° C, for C-contents 0.40 to 0.45% 61 to 70 ° C and for C-contents of 0.46 to 0 , 50% is the temperature range 71 to 79 ° C.
  • the cooling conditions can thus be adjusted in an advantageous manner specifically to the carbon content of the steel and thus to the sensitivity to heat.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP04090351A 2003-10-28 2004-09-14 Procédé de traitement thermique pour des aciers à teneur moyenne de carbone Withdrawn EP1528109A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003150832 DE10350832A1 (de) 2003-10-28 2003-10-28 Verfahren zur Wärmebehandlung metallischer Werkstücke
DE10350832 2003-10-28

Publications (1)

Publication Number Publication Date
EP1528109A1 true EP1528109A1 (fr) 2005-05-04

Family

ID=34399624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04090351A Withdrawn EP1528109A1 (fr) 2003-10-28 2004-09-14 Procédé de traitement thermique pour des aciers à teneur moyenne de carbone

Country Status (2)

Country Link
EP (1) EP1528109A1 (fr)
DE (1) DE10350832A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524932A (en) * 1978-08-08 1980-02-22 Nippon Steel Corp Manufacture of bainite tough hardening steel
CA1191077A (fr) * 1982-03-15 1985-07-30 Friedrich W. Kruppert Methode de trempe discontinue
US5681407A (en) * 1993-05-18 1997-10-28 Aluminum Company Of America Method of heat treating metal with liquid coolant containing dissolved gas
WO2001006022A1 (fr) * 1999-07-19 2001-01-25 Centre De Recherches Metallurgiques Procede de fabrication d'une bande d'acier en continu

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD67999A (fr) *
DE19755001C2 (de) * 1997-12-11 1999-10-14 Thyssenkrupp Stahl Ag Verfahren zum Härten von Härtegut

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524932A (en) * 1978-08-08 1980-02-22 Nippon Steel Corp Manufacture of bainite tough hardening steel
CA1191077A (fr) * 1982-03-15 1985-07-30 Friedrich W. Kruppert Methode de trempe discontinue
US5681407A (en) * 1993-05-18 1997-10-28 Aluminum Company Of America Method of heat treating metal with liquid coolant containing dissolved gas
WO2001006022A1 (fr) * 1999-07-19 2001-01-25 Centre De Recherches Metallurgiques Procede de fabrication d'une bande d'acier en continu

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"TYPICAL COOLING RATE CURVES FOR VARIOUS LIQUID QUENCHANTS", February 1998, ADVANCED MATERIALS & PROCESSES, AMERICA SOCIETY FOR METALS. METALS PARK, OHIO, US, PAGE(S) 36EE, ISSN: 0882-7958, XP000737257 *
LAMPMAN S.R., ZORC T.B.: "ASM Handbook", August 1991, ASM INTERNATIONAL, USA, XP002307399, 4 *
PATENT ABSTRACTS OF JAPAN vol. 0040, no. 54 (C - 008) 23 April 1980 (1980-04-23) *

Also Published As

Publication number Publication date
DE10350832A1 (de) 2005-06-09

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