EP0195739B1 - Procédé de recuit semi-continu - Google Patents

Procédé de recuit semi-continu Download PDF

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Publication number
EP0195739B1
EP0195739B1 EP86730028A EP86730028A EP0195739B1 EP 0195739 B1 EP0195739 B1 EP 0195739B1 EP 86730028 A EP86730028 A EP 86730028A EP 86730028 A EP86730028 A EP 86730028A EP 0195739 B1 EP0195739 B1 EP 0195739B1
Authority
EP
European Patent Office
Prior art keywords
strip
coil
annealing
zone
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.)
Expired - Lifetime
Application number
EP86730028A
Other languages
German (de)
English (en)
Other versions
EP0195739A2 (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 a method for the comparison of cold-rolled steel blend.
  • Cold rolled steel blend must be annealed after cold rolling in order to be used for further processing, e.g. by deep drawing to achieve the required mechanical properties.
  • the annealing of cold rolled steel strip is done e.g. Currently still predominantly in hood ventilation systems. 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 hood scraper 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 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 bell anneal and is only about 10 minutes.
  • the disadvantage of continuous annealing is that, in their current conception, 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 process 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.
  • the invention advantageously provides a semi-continuous annealing process in which an otherwise customary separate aging furnace is saved by two passes through an annealing system and operation of the annealing furnace as an aging furnace. 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 over-furnace furnace in this system, is bypassed during the first pass of the belt.
  • the cold-rolled strip first passes 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, primarily inductively 11, and briefly kept at annealing temperature 12 (under protective gas). The strip is then slowly cooled 13 with a cooled protective gas from the holding temperature between 700 ° C and 850 ° C to a lower temperature 13 and very quickly quenched in a known manner after exiting the furnace in a water tank 14, the quenching speed depending on the strip thickness approx Can be 500 to 2000 ° C per second. Depending on the steel grade, the water tank can be broken off directly from the holding temperature. 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. In a known manner, the reel and a band store and a pair of scissors 17 are arranged upstream.
  • 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.
  • the surface is covered by a thin oxide layer.
  • pickling and aging being carried out in order to remove the oxide layer and to partially or completely remove the dissolved carbon.
  • these bundles are returned to the decoilers after passing through an intermediate storage 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 furnace 10 again.
  • the strip is heated inductively, preferably under protective gas, to the aging temperature, which is 200 ° C. to 400 ° C., depending on the steel grade.
  • 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 ends.

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)

Claims (2)

1. Procédé de recuit d'une bande d'acier laminée à froid en particulier pour le traitement de petites quantités de bandes, dans lequel la bande, déroulée par des dévidoirs, est guidée successivement à travers les postes de traitement suivants: une cisaille transversale (2), une machine de soudage (3), un poste de stockage de bandes (4), une partie de nettoyage des bandes (5,7,8,9), un four de recuit (10) avec zone de chauffage (11), zone de maintien (12) et zone de refroidissement (13), un dispositif de trempe à l'eau (14), une installation de décapage (6) pour éliminer la couche d'oxyde, suivie par une zone de neutralisation (7), de rinçage (8) et de séchage (9), un four de vieillissement (10) avec zone de chauffage (11), zone de vieillissment (12) et zone de refroidissement (13), un autre post de stockage de bandes (16), une cisaille transversale (17), avant qu'elle ne soit enroulée sur un de, le chas échéant, plusieurs enrouloirs (18), caractérisé en ce que la bande, après avoir quitté le dispositif de trempe à l'eau (14) et après avoir traversé le dispositif de séchage (15) et le dispositif de stockage (16), est enroulée en une bobine et, sous forme de bobine, est amenée à un magasin intermédiaire (19), et en ce que la bobine, venant du magasin intermédiaire (19), est amenée de nouyeau au dévidoir (1), pour être guidée, une seconde fois, à travers la ligne de recuit (10 à 13) fonctionnant alors comme ligne de vieillissement, la bande étant, de façon connue, tout d'abord décapée (6), neutralisée (7), rincée (8), séchée (9) et vieillit de façon habituelle à la température appropriée, dans le four de recuit (10), et ensuite enroulée (18).
2. Procédé selon la revendication 1, caractérisé en ce que, avant le passage l'extrémité de la dernière bobine lors du premier passage, une bande fictive est soudée à l'extrémité de bande, à l'extrémité de laquelle le début de la première bobine du second passage est soudé.
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
DE3510050 1985-03-20
DE19853510050 DE3510050A1 (de) 1985-03-20 1985-03-20 Halbkontinuierliche gluehanlage

Publications (3)

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

Families Citing this family (4)

* 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
AT411821B (de) * 2002-06-20 2004-06-25 Heinz Ing Altendorfer Bauform und betriebsweise von behandlungsanlagen für bänder oder drähte aus metall
US9708686B2 (en) 2015-01-02 2017-07-18 The Beoing Company Apparatuses and methods for processing a metal ribbon
JP2025512994A (ja) * 2022-04-11 2025-04-22 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 熱間ストリップ用の熱処理ライン

Family Cites Families (2)

* 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
ES532780A0 (es) * 1983-05-31 1985-11-01 Nippon Steel Corp Procedimiento y aparato para recocer continuamente chapas o flejes de acero

Also Published As

Publication number Publication date
JPS61221333A (ja) 1986-10-01
DE3510050C2 (fr) 1987-07-30
EP0195739A2 (fr) 1986-09-24
US4710240A (en) 1987-12-01
JPH0218366B2 (fr) 1990-04-25
EP0195739A3 (en) 1988-08-10
DE3672277D1 (de) 1990-08-02
DE3510050A1 (de) 1986-12-04

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