EP0195739A2 - Procédé de recuit semi-continu - Google Patents

Procédé de recuit semi-continu Download PDF

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Publication number
EP0195739A2
EP0195739A2 EP86730028A EP86730028A EP0195739A2 EP 0195739 A2 EP0195739 A2 EP 0195739A2 EP 86730028 A EP86730028 A EP 86730028A EP 86730028 A EP86730028 A EP 86730028A EP 0195739 A2 EP0195739 A2 EP 0195739A2
Authority
EP
European Patent Office
Prior art keywords
strip
bundle
annealing
aging
store
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.)
Granted
Application number
EP86730028A
Other languages
German (de)
English (en)
Other versions
EP0195739B1 (fr
EP0195739A3 (en
Inventor
Klaus Dr.-Ing. Fromman
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
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0195739A2 publication Critical patent/EP0195739A2/fr
Publication of EP0195739A3 publication Critical patent/EP0195739A3/de
Application granted granted Critical
Publication of EP0195739B1 publication Critical patent/EP0195739B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention relates to an annealing system for cold-rolled steel strip.
  • Cold-rolled steel strip must be annealed after cold rolling in order to be used for further processing, e.g. B. by deep drawing to achieve the required mechanical properties.
  • the annealing of cold rolled steel strip is done e.g. Currently still largely in bell annealers. This process is very lengthy, with annealing and cooling times of up to 10 days being common.
  • An advantage of the hood annealing is that even small production quantities can be produced economically and that the investment costs for a plant of low production are relatively low.
  • a major disadvantage of the bell annealer is that high-strength steels, especially the so-called dual-phase steels, can only be produced to a very limited extent and with the use of additional alloying elements, which makes these steels correspondingly expensive.
  • the disadvantages of bell annealing are largely eliminated by the continuous annealing. This enables cost-effective production of high-strength steels, better uniformity of the material properties over the length of the strip, better cleanliness of the strip surface and excellent flatness of the strip. In addition, the throughput time of the material is drastically reduced compared to the hood anneal and is only about 10 minutes.
  • the disadvantage of continuous annealing is that, in their current design, they require very high investment costs and are therefore only economically interesting for relatively high annual production.
  • the object of the invention is to provide an annealing system with which even smaller production quantities can be processed economically in a process corresponding to continuous annealing. According to the invention, this object is achieved by the features specified in the patent claims.
  • a semi-continuous annealing installation is created in a favorable manner, in which an otherwise usual separate over-aging furnace is achieved by passing through the installation twice and operating the annealing furnace as an aging furnace is saved. This considerably reduces the system outlay; the overall length is greatly reduced.
  • the pickling which must be arranged in front of the annealing furnace or aging furnace in this system, is bypassed the first time the belt is run through.
  • the cold-rolled strip first goes through the known strip cleaning process steps (degreasing 5, rinsing 7, drying 8). Then it runs into a vertical annealing furnace 10; where it is heated to annealing temperature, mainly inductively 11, and briefly held to annealing temperature 12 (under protective gas). The strip is then slowly cooled 13 from the holding temperature between 700 ° C and 850 ° C to a lower temperature with cooled protective gas and quenched very quickly in a known manner after exiting the furnace in a water tank 14, the quenching speed depending on the strip thickness being approx Can be 500 to 2000 ° C per second. Depending on the steel grade, quenching in the water tank can also take place directly from the holding temperature.
  • the belt surface After exiting the furnace, the belt surface is oxidized.
  • the tape which is moist after exiting the water tank, is then dried 15 and wound up into a bundle by a reel 18.
  • a tape store and a pair of scissors 17 are arranged in front of the reel.
  • the bundles annealed and quenched in this way still contain a high proportion of carbon dissolved in iron and are therefore not yet suitable for further processing. Besides, that is Surface covered by a thin layer of oxide.
  • a second pass of the strip through the plant according to FIG. 2 then follows, wherein pickling and aging are carried out in order to remove the oxide layer and to partially or completely remove the dissolved carbon. For this purpose, after a sufficiently large number of bundles have passed through the first treatment stage, these bundles are returned to the decoilers after passing through an intermediate store 19.
  • the first band is welded to a dummy band (at 3), which has been welded to the last band of the first pass.
  • the strip passes through the pickle 6, neutralization 7, sink 8 and dryer 9 before it enters the oven 10 again.
  • the strip is preferably inductively heated under protective gas to the aging temperature which, depending on the steel grade, is 200 ° C. to 400 ° C.
  • the strip is held at this temperature in a known manner for about 45 to 60 seconds, the carbon dissolved in the iron being partially or almost completely eliminated, depending on the temperature.
  • the strip is cooled to a temperature below 100 ° C. by means of cooled protective gas, so that it no longer oxidizes when it leaves the furnace.
  • the tape is then fed through the dry water tank to the take-up reel 18 and wound into bundles.

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)
EP86730028A 1985-03-20 1986-02-21 Procédé de recuit semi-continu Expired - Lifetime EP0195739B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853510050 DE3510050A1 (de) 1985-03-20 1985-03-20 Halbkontinuierliche gluehanlage
DE3510050 1985-03-20

Publications (3)

Publication Number Publication Date
EP0195739A2 true EP0195739A2 (fr) 1986-09-24
EP0195739A3 EP0195739A3 (en) 1988-08-10
EP0195739B1 EP0195739B1 (fr) 1990-06-27

Family

ID=6265790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730028A Expired - Lifetime EP0195739B1 (fr) 1985-03-20 1986-02-21 Procédé de recuit semi-continu

Country Status (4)

Country Link
US (1) US4710240A (fr)
EP (1) EP0195739B1 (fr)
JP (1) JPS61221333A (fr)
DE (2) DE3510050A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT411821B (de) * 2002-06-20 2004-06-25 Heinz Ing Altendorfer Bauform und betriebsweise von behandlungsanlagen für bänder oder drähte aus metall

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11342402A (ja) * 1998-05-29 1999-12-14 Kawasaki Steel Corp 冷間圧延設備
US9708686B2 (en) 2015-01-02 2017-07-18 The Beoing Company Apparatuses and methods for processing a metal ribbon
WO2023198634A1 (fr) * 2022-04-11 2023-10-19 Sms Group Gmbh Ligne de traitement thermique pour une bande à chaud

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127190A2 (fr) * 1983-05-31 1984-12-05 Nippon Steel Corporation Procédé et dispositif pour le recuit en continu de tôles d'acier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106811C2 (de) * 1981-02-24 1988-10-20 Klöckner-Werke AG, 4100 Duisburg Anlage zum kontinuierlichen Behandeln von Feinblech

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127190A2 (fr) * 1983-05-31 1984-12-05 Nippon Steel Corporation Procédé et dispositif pour le recuit en continu de tôles d'acier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT411821B (de) * 2002-06-20 2004-06-25 Heinz Ing Altendorfer Bauform und betriebsweise von behandlungsanlagen für bänder oder drähte aus metall

Also Published As

Publication number Publication date
JPS61221333A (ja) 1986-10-01
DE3510050C2 (fr) 1987-07-30
DE3510050A1 (de) 1986-12-04
DE3672277D1 (de) 1990-08-02
EP0195739B1 (fr) 1990-06-27
EP0195739A3 (en) 1988-08-10
JPH0218366B2 (fr) 1990-04-25
US4710240A (en) 1987-12-01

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