EP0058607B1 - Dispositif de refroidissement rapide et contrôlé dans un four de recuit en atmosphère neutre ou réductrice - Google Patents

Dispositif de refroidissement rapide et contrôlé dans un four de recuit en atmosphère neutre ou réductrice Download PDF

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Publication number
EP0058607B1
EP0058607B1 EP82400237A EP82400237A EP0058607B1 EP 0058607 B1 EP0058607 B1 EP 0058607B1 EP 82400237 A EP82400237 A EP 82400237A EP 82400237 A EP82400237 A EP 82400237A EP 0058607 B1 EP0058607 B1 EP 0058607B1
Authority
EP
European Patent Office
Prior art keywords
strip
gas
blowing
cooling device
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
EP82400237A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0058607A1 (fr
Inventor
Robert Wang
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.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
Fives Stein SA
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 Stein Heurtey SA, Fives Stein SA filed Critical Stein Heurtey SA
Publication of EP0058607A1 publication Critical patent/EP0058607A1/fr
Application granted granted Critical
Publication of EP0058607B1 publication Critical patent/EP0058607B1/fr
Expired 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum

Definitions

  • the present invention relates to the rapid and controlled cooling of a metal strip, in an annealing furnace in a neutral or reducing atmosphere.
  • Another technique also well known (see FR-A-2460333), consists in effecting a cooling by contact effect of the strip in continuous travel with a metal roller on which this strip is applied and which is cooled by a liquid.
  • This technique has the drawback, for a fixed winding of the strip around the cooled roller, of not allowing the cooling speed to be regulated. It is therefore necessary, in order to be able to maintain the final cooling temperature at a desired level, to vary the length of winding of the strip on the roller, which leads to complex mechanical arrangements, since the rollers and the strip to be cooled are located in a sealed enclosure relative to the outside.
  • the present invention proposes to provide a rapid and controlled cooling device in an annealing furnace in a neutral or reducing atmosphere, not having the drawbacks mentioned above of the techniques currently known.
  • This device essentially comprises a series of rollers cooled by liquid, arranged in the oven and on which the strip to be treated is applied, and it is characterized in that said rollers have a fixed position, so that the length of the arc winding of the strip around them does not vary during cooling, and in that there is provided, in front of each roller, a gas jet blowing means designed so as to project a gas jet perpendicular to the strip running continuously.
  • the final temperature of the strip leaving the device is regulated by varying the blowing speed of the jets striking this strip.
  • a protective gas is used in the jet blowing system, in any desired proportion.
  • each roller such as 14, a means of blowing by gas jets.
  • each of these means is constituted by a box, such as 18, provided with nozzles or slots ensuring a projection of gaseous jets 20 perpendicular to the strip 10, over a length substantially close to that of the arc for winding the strip 10 around the cooled roller 14.
  • the passage of the strip being perfectly delimited in space, the geometry of the jets 20 can be chosen so as to give them greater cooling efficiency than that obtained with conventional cooling systems by blowing gas jets.
  • the gas blown through the nozzles or the slots in the boxes 18 is, after heat exchange with the strip, taken up by a line 22, to be sent to an exchanger 24 outside the installation, before being recycled, by the through a recirculation fan 26, in the blowing boxes 18.
  • the final temperature of the strip 10 leaving the device is regulated by varying the speed of blowing the jets. gas coming to strike the strip. This variation can extend from a value equal to zero up to the maximum value made possible by the characteristics of the recirculation fan 26.

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 Strip Materials And Filament Materials (AREA)
EP82400237A 1981-02-12 1982-02-10 Dispositif de refroidissement rapide et contrôlé dans un four de recuit en atmosphère neutre ou réductrice Expired EP0058607B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8102744 1981-02-12
FR8102744A FR2499591A1 (fr) 1981-02-12 1981-02-12 Dispositif de refroidissement rapide et controle dans un four de recuit en atmosphere neutre ou reductrice

Publications (2)

Publication Number Publication Date
EP0058607A1 EP0058607A1 (fr) 1982-08-25
EP0058607B1 true EP0058607B1 (fr) 1984-12-27

Family

ID=9255114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400237A Expired EP0058607B1 (fr) 1981-02-12 1982-02-10 Dispositif de refroidissement rapide et contrôlé dans un four de recuit en atmosphère neutre ou réductrice

Country Status (3)

Country Link
EP (1) EP0058607B1 (enExample)
DE (2) DE58607T1 (enExample)
FR (1) FR2499591A1 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3463162D1 (en) * 1983-06-11 1987-05-21 Nippon Steel Corp Method for cooling a steel strip in a continuous-annealing furnace
JPS60128220A (ja) * 1983-12-15 1985-07-09 Mitsubishi Heavy Ind Ltd 連続焼鈍炉冷却帯のストリツプ温度制御方法
JPS60169524A (ja) * 1984-02-14 1985-09-03 Mitsubishi Heavy Ind Ltd 金属ストリツプ冷却装置
JPS62149820A (ja) * 1985-12-24 1987-07-03 Kawasaki Steel Corp 鋼帯の冷却方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460333A1 (fr) * 1979-06-28 1981-01-23 Nippon Kokan Kk Procede et appareil pour refroidir des bandes d'acier au cours d'un traitement de recuit en continu

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2023285A (en) * 1934-08-30 1935-12-03 Gen Electric Heat treating
DE878949C (de) * 1944-04-04 1953-06-08 Benno Schilde Maschb A G Durchziehofen zum Warmbehandeln von Baendern und Draehten
US2890037A (en) * 1954-11-10 1959-06-09 United States Steel Corp Method and apparatus for continuously cooling metal strips
JPS54118315A (en) * 1978-03-08 1979-09-13 Nippon Kokan Kk <Nkk> Metal belt cooling

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460333A1 (fr) * 1979-06-28 1981-01-23 Nippon Kokan Kk Procede et appareil pour refroidir des bandes d'acier au cours d'un traitement de recuit en continu

Also Published As

Publication number Publication date
EP0058607A1 (fr) 1982-08-25
FR2499591B1 (enExample) 1984-06-22
FR2499591A1 (fr) 1982-08-13
DE58607T1 (de) 1983-03-03
DE3261651D1 (en) 1985-02-07

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