FR2078143A5 - Steel treatment - by faster controlled cooling, quenching and annealing schedules - Google Patents

Steel treatment - by faster controlled cooling, quenching and annealing schedules

Info

Publication number
FR2078143A5
FR2078143A5 FR7103610A FR7103610A FR2078143A5 FR 2078143 A5 FR2078143 A5 FR 2078143A5 FR 7103610 A FR7103610 A FR 7103610A FR 7103610 A FR7103610 A FR 7103610A FR 2078143 A5 FR2078143 A5 FR 2078143A5
Authority
FR
France
Prior art keywords
degrees
temp
cooling
quenching
controlled 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.)
Expired
Application number
FR7103610A
Other languages
French (fr)
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.)
Krupp Stahl AG
Original Assignee
Stahlwerke Suedwestfalen 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 Stahlwerke Suedwestfalen AG filed Critical Stahlwerke Suedwestfalen AG
Priority to FR7103610A priority Critical patent/FR2078143A5/en
Application granted granted Critical
Publication of FR2078143A5 publication Critical patent/FR2078143A5/en
Expired 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
    • 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

Landscapes

  • 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 Steel (AREA)

Abstract

Steel immediately after the hot forming treatment is subjected to a faster cooling schedule than conventionally, by cooling to a temp. 10-40 degrees C above the Au point and maintained at this temp for 5-20 mins (cooling rate used of 5-25 degrees C/sec). It is then quenched to below the martensitic transformation temp., followed by a conventional annealing process. Spec. during the final hot rolling the final temp. tE is kept so that tE plus-or-minus 15 degrees C is in the range 880-950 degrees C, with selective heating or cooling of regions of the material outside these limits. Steel of improved mechanical characteristics is obtained with significant reduction in treatment times.
FR7103610A 1971-02-03 1971-02-03 Steel treatment - by faster controlled cooling, quenching and annealing schedules Expired FR2078143A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7103610A FR2078143A5 (en) 1971-02-03 1971-02-03 Steel treatment - by faster controlled cooling, quenching and annealing schedules

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7103610A FR2078143A5 (en) 1971-02-03 1971-02-03 Steel treatment - by faster controlled cooling, quenching and annealing schedules

Publications (1)

Publication Number Publication Date
FR2078143A5 true FR2078143A5 (en) 1971-11-05

Family

ID=9071330

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7103610A Expired FR2078143A5 (en) 1971-02-03 1971-02-03 Steel treatment - by faster controlled cooling, quenching and annealing schedules

Country Status (1)

Country Link
FR (1) FR2078143A5 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2323765A1 (en) * 1975-09-12 1977-04-08 Italsider Spa THERMAL TREATMENT OF STEEL LAMINATES, BY INTERMEDIATE TEMPERING AND QUICK REINFORCEMENT BY MEANS OF PARASITIC CURRENTS
FR2403391A1 (en) * 1977-09-19 1979-04-13 Centre Rech Metallurgique PROCESS FOR IMPROVING THE QUALITY OF STEEL PROFILES
WO1997040196A1 (en) * 1996-04-19 1997-10-30 Naco Incorporated Method of making a heat treated steel casting and a heat treated steel casting
GB2317187A (en) * 1996-04-19 1998-03-18 Naco Inc Method of making a heat treated steel casting and a heat treated steel casting
RU2457257C1 (en) * 2011-06-17 2012-07-27 Открытое акционерное общество "ЕВРАЗ Объединенный Западно-Сибирский металлургический комбинат" (ОАО "ЕВРАЗ ЗСМК") Manufacturing method of rolled products of angle section

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2323765A1 (en) * 1975-09-12 1977-04-08 Italsider Spa THERMAL TREATMENT OF STEEL LAMINATES, BY INTERMEDIATE TEMPERING AND QUICK REINFORCEMENT BY MEANS OF PARASITIC CURRENTS
FR2403391A1 (en) * 1977-09-19 1979-04-13 Centre Rech Metallurgique PROCESS FOR IMPROVING THE QUALITY OF STEEL PROFILES
WO1997040196A1 (en) * 1996-04-19 1997-10-30 Naco Incorporated Method of making a heat treated steel casting and a heat treated steel casting
GB2317187A (en) * 1996-04-19 1998-03-18 Naco Inc Method of making a heat treated steel casting and a heat treated steel casting
US5900082A (en) * 1996-04-19 1999-05-04 Naco, Inc. Method of making a heat treated steel casting and a heat treated steel casting
GB2317187B (en) * 1996-04-19 2000-02-02 Naco Inc Method of making a heat treated steel casting and a heat treated steel casting
RU2457257C1 (en) * 2011-06-17 2012-07-27 Открытое акционерное общество "ЕВРАЗ Объединенный Западно-Сибирский металлургический комбинат" (ОАО "ЕВРАЗ ЗСМК") Manufacturing method of rolled products of angle section

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Legal Events

Date Code Title Description
ST Notification of lapse