EP0708843A1 - Procede et installation permettant de realiser des ebauches en acier special - Google Patents

Procede et installation permettant de realiser des ebauches en acier special

Info

Publication number
EP0708843A1
EP0708843A1 EP94924719A EP94924719A EP0708843A1 EP 0708843 A1 EP0708843 A1 EP 0708843A1 EP 94924719 A EP94924719 A EP 94924719A EP 94924719 A EP94924719 A EP 94924719A EP 0708843 A1 EP0708843 A1 EP 0708843A1
Authority
EP
European Patent Office
Prior art keywords
descaling
strip
stainless steel
pickling
plant
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
EP94924719A
Other languages
German (de)
English (en)
Other versions
EP0708843B1 (fr
Inventor
Gerald Maresch
Edgar Braun
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.)
Andritz Patentverwaltungs GmbH
Original Assignee
Andritz Patentverwaltungs GmbH
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 Andritz Patentverwaltungs GmbH filed Critical Andritz Patentverwaltungs GmbH
Publication of EP0708843A1 publication Critical patent/EP0708843A1/fr
Application granted granted Critical
Publication of EP0708843B1 publication Critical patent/EP0708843B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
    • 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
    • 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

Definitions

  • the invention relates to a method for producing stainless steel blanks, in particular stainless steel strip, comprising at most the rolling and annealing of cast material, and descaling, in particular by pickling in aqueous media, and possibly winding up in the form of stainless steel blanks, or a method comprising the process steps of Casting, if necessary rolling the cast material, cooling, and descaling, in particular by pickling in aqueous media, and possibly winding up strip-shaped stainless steel blanks.
  • the stainless steel is melted with all alloying elements, the melt is poured into a slab and this is mechanically cleaned of contaminants on the surface after cooling. Then the cleaned slab is heated again and in a hot rolling mill into a strip - typically with a maximum thickness of 15 mm, a maximum width of 2.5 m and a length of the order of up to 100 m and more - or a plate - typically with a thickness between 10 and 150 mm and dimensions of about 10 m length and 3 m width - rolled out.
  • the stainless steel strip can be treated in batches in a suitable pickling line, as described for example in AT-PS 394.734, without further annealing. Different steel grades and strips or plates of different dimensions can be treated directly in succession without the need for time-consuming changes to the treatment system. Otherwise, the stainless steel hot strip is annealed in continuously working annealing and pickling lines in a gas-heated annealing furnace, then cooled, the majority of the scale is removed mechanically and the remaining scale is removed by pickling with preferably acids, with a pretreatment with electricity to save acids can be used in neutral salt solutions. With this type of system, stainless steel strips are welded into an endless strip, which is cut again at the end of the system.
  • Sheets or other shaped blanks are transported through the system in various ways.
  • this also has the disadvantage that, for example, the strip has to be removed from a strip storage during the welding time, which is then filled again.
  • all strip that is currently in the annealing furnace is scrap, as it has been subjected to the annealing treatment for too long.
  • the invention is intended to avoid the disadvantages mentioned above and to provide a method or a system in which there is greater flexibility in the sequence of stainless steel qualities and dimensions of the blanks in the entire manufacturing process for stainless steel blanks.
  • this is achieved according to the invention by batch-wise heat treatment of the material, preferably batch-wise annealing and descaling which follows the last heat treatment of the material without intermediate storage, the material being pushed through, if appropriate, an annealing furnace and the descaling system, preferably a pickling system until the beginning of the material has emerged from the descaling system, after which the material is drawn exclusively or additionally by devices located after the descaling system through the annealing furnace and the descaling system.
  • the process variant of the production of stainless steel blanks that are cast is characterized according to the invention by the batch-wise casting and the subsequent descaling without intermediate storage, the material being pushed through, if appropriate, an annealing furnace and the descaling system, preferably a pickling system, until the beginning of the material from the Descaling system has leaked, after which the material is exclusively or additionally from facilities located after the descaling system by the annealing furnace and Descaling system is pulled.
  • the advantages correspond to the first-mentioned method in terms of flexibility in the immediately successive producibility of different stainless steel qualities and blanks of different dimensions.
  • the material is first hot-rolled after casting, then annealed, cooled and descaled without intermediate storage of the annealed material after the last heat treatment, an improved quality of the stainless steel can be achieved with many materials while maintaining the advantages mentioned above.
  • it can be hot rolled after casting and then directly annealed, cooled and descaled.
  • the strip can be cooled directly in a descaling system consisting of a mechanical pre-descaling with a subsequent chemical descaling (pickling) of the formed Scale is freed, the strip not having to be wound up into a bundle beforehand, but instead all steps are carried out continuously in one pass. Only before the strip is wound up into a bundle or, if necessary, passed directly through the annealing and descaling system, is the beginning of the strip, which in the case of casting is not the same width as the rest of the subsequent strip, cut off with scissors and returned as scrap . The end of the tape, which also does not have the full bandwidth, is also cut off and returned.
  • strip-shaped material is preferably fed to a winding device, preferably a reel, and wound thereon, the material preferably being pulled through the system by the winding device.
  • the material is cut into plates after leaving the descaling system.
  • the requirements of the customers regarding the dimensions or the surface quality of the stainless steel can be met in a favorable manner if the strip-shaped material is smoothed, if necessary before winding, for example in a skin-pass system.
  • descaling is carried out chemically, optionally after mechanical descaling, preferably by means of acids, for example nitric acid, sulfuric acid, hydrochloric acid, hydrofluoric acid or a mixture of at least two of these acids and / or aqueous solutions of one or more salts of these acids with the metals contained in the material.
  • acids for example nitric acid, sulfuric acid, hydrochloric acid, hydrofluoric acid or a mixture of at least two of these acids and / or aqueous solutions of one or more salts of these acids with the metals contained in the material.
  • the chemical descaling described above is advantageously facilitated by electrolytic treatment of the material, in particular in a neutral salt solution, before chemical descaling, the material preferably being alternately polarized anodically or cathodically.
  • the upstream electrolytic treatment loosens the scale layer and thereby facilitates chemical attack by the pickling liquid.
  • the material is inductively heated in the annealing furnace. This means that the warm-up times of the material can be around 10 to 20% of the time in conventional annealing furnaces with gas burners and, consequently, the throughput times reduced by the annealing system and the throughput rate can be increased through the entire system.
  • a plant according to the invention for producing stainless steel blanks comprises a casting plant for the raw material and a descaling plant, preferably a pickling plant, and is characterized according to the invention by cooling devices for the cast material and devices for pushing the beginning of the material through the immediately following descaling plant.
  • a rolling mill preferably a hot rolling mill
  • a descaling plant preferably a pickling plant
  • the descaling plant is connected to an annealing device for the rolled material, preferably a Annealing furnace, if necessary a cooling device after the annealing device, without intermediate storage, for example winding and unwinding devices, immediately following.
  • An advantageous embodiment of the system according to the invention is characterized in that the glow device is designed as an inductively acting glow device. Due to the shorter heating times, considerably smaller annealing furnaces can be used with the same throughput, which leads to large savings in investment costs, or with the same design of the furnace, higher throughput of the furnace and also the entire system. In addition, the direct heating and the associated reduction in heat losses also reduce operating costs.
  • the annealing device and the descaling system are equipped with means for pushing the beginning of the material through the device or system, i.e. designed as a thrust annealing device or thrust pickling system.
  • a thrust annealing device or thrust pickling system i.e. designed as a thrust annealing device or thrust pickling system.
  • devices for gripping the beginning of the material emerging from the descaling plant are advantageously provided after the descaling plant, preferably driven winding devices such as a reel.
  • a cross-cut shear could be provided.
  • a device for smoothing the material is between the descaling system and the winding device or cross-cut shear smoothing device, such as a skin-pass system, provided.
  • the descaling system has at least one chemical descaling section, in particular a pickling section with at least one container for holding aqueous pickling media, preferably acids.
  • aqueous pickling media preferably acids.
  • electrodes of different polarity are present in at least one container according to a further feature of the invention.
  • At least one washing brush machine preferably with abrasive brushes, can be provided between at least two containers.
  • a rinsing section is provided, which is preferably equipped with a washing brush machine, preferably with abrasive brushes.
  • FIG. 1 shows a flow diagram of a conventional method for producing stainless steel strip
  • FIGS. 2, 3 and 4 show flow diagrams of three method variants according to the invention
  • FIG. 5 schematically represents a conventional system for producing stainless steel strip
  • FIG 6, 7 and 8 represent, likewise schematically, advantageous exemplary embodiments for plants for carrying out the method according to the invention.
  • Fig. 1 shows the sequence of a conventional method for producing a stainless steel strip with the successive steps of melting the stainless steel, pouring the slab, cooling the cast slab and cleaning it from the adhering scale, heating again, hot rolling to the desired final thickness Tape, cooling and winding into a bundle. Subsequently, however, after a storage period that is in principle arbitrary, can the bundle is annealed again in a conventional continuous annealing and pickling system before being fed in for further processing and then descaled mechanically and / or chemically, after which the finished strip is either wound up again into a bundle or cut into plates.
  • the melting of the stainless steel is followed by casting of the blank and hot rolling to the desired strip thickness. This is followed by cooling and winding the tape into a bundle.
  • This bundle is, if necessary, discontinuously annealed and descaled after a certain storage period, that is to say without being connected to another bundle, for example by welding, after which the finished strip is rewound - or also cut into plates.
  • the strip is immediately cast in the desired thickness, as is the case according to a second variant of the method shown in FIG. 3, the strip, which is already of the final thickness, is cooled immediately by the discontinuous annealing and descaling of the strip. Finally, it can be rewound or cut into plates.
  • the process sequence shown schematically in FIG. 4 complements the previously described sequence to the extent that, if necessary, the strip can be annealed after it has been hot-rolled and then cooled. Only after the repeated cooling, there is then an intermittent annealing and immediately followed by the descaling of the strip and its winding or cutting.
  • FIG. 5 schematically shows a plant for the production of stainless steel strip according to the conventional method.
  • Stainless steel melted and poured in the continuous casting plant 2.
  • Pieces of a predetermined length are separated from a separating device 3, which are then fed to an annealing furnace 4, then rolled in a hot rolling mill 5 to the desired final thickness of the strip, cooled in a cooling system 6, for example by spraying with water or air cooling, and finally preferably on a coiler 7 be wound up in bundles.
  • Such bundles of stainless steel strips are further fed to a continuous annealing and pickling system.
  • continuous means that the strips delivered one after the other are unwound from a reel 8, connected to one another in a welding installation 10 and drawn through the subsequent installations as a "continuous strip".
  • the strip In order not to hinder the continuous passage of the preceding strip section during the welding of two strips, the strip must be removed from a strip store 11 for this period of time.
  • the repeated annealing in the annealing system 12 can often be omitted, but the mechanical pre-descaling in the descaling system 13, for example a "shot blaster", and the chemical descaling in a pickling section 14, if necessary with current support, are absolutely necessary for the required surface quality of the strip are.
  • the belt After a rinsing system 15 for removing pickling liquid still on the belt, the belt again arrives in a memory 16 so as not to impede the separation of the individual belt sections by the cross-cutting system 17, and is finally wound up again into a bundle on a reel 18.
  • the embodiment of the plant according to the invention shown in FIG. 6 also includes the ladle 1 and the continuous casting plant 2, from which the cast blank is fed directly to the hot rolling mill 5 and, after subsequent cooling in the cooling system 6, is wound up on a reel 7.
  • Each bundle is unwound from the unwinding device 8 and fed directly to an annealing furnace 12 without being connected to a preceding or subsequent bundle.
  • the beginning of each strip is pushed through the annealing furnace 12, the mechanical descaling system 13, the chemical descaling system 14 and the rinsing system 15, until it reaches the reel 18.
  • the beginning of the tape is preferably clamped and can then transport the tape exclusively or together with the devices for pushing the beginning of the tape through the systems 12, 13, 14 and 15, the tape being wound up again.
  • a washing brush machine 14a can advantageously be provided between each two pickling tubs of the pickling system 14, and instead of the reel 18 a cross-cutting system could be provided for dividing the finished strip into plates.
  • a further advantageous embodiment for a system according to the invention provides, as shown in FIG. 7, to cast a strip with the desired final thickness directly in a strip casting system 2a and to cool it in a cooling system 6.
  • This strip is then fed directly to the annealing furnace 12, pushed through it and, after renewed cooling in a further cooling system 6, is fed to the mechanical descaling system 13 and the chemical descaling system 14, through which the strip is also pushed until it passes the reel after passing through the rinsing system 15 18 or has reached a cross-cutting system.
  • the strip is first hot-rolled to the desired thickness after the strip casting system 2a and then goes through the process steps and systems described in the previous paragraph, with the exception that the descaling is directly followed by the annealing.
  • a stainless steel strip of quality AISI 304 with a dimension of 350 mm width and 10 mm thickness was continuously cast on a test plant, cooled to a strip temperature of 60 ° C. and then freed from the scale formed in a chemical pickling plant.
  • the first part of the tape was cut into 1.5 m long slabs with cross-cut scissors, the rest was wound up on a reel.
  • the technological properties of the stainless steel belt corresponded to the properties of a conventionally manufactured belt.
  • a stainless steel strip of AISI 304 quality in the dimensions 350 mm wide and 13 mm thick was continuously cast, cooled somewhat and rolled directly to a final thickness of 5 mm in a hot rolling mill. After the rolled strip had cooled to 45 ° C., the stainless steel strip was pushed directly through a mechanical and chemical descaling system, pickled, rinsed and dried. It was only after drying that the tape was wound up for the first time.
  • the technological properties of the stainless steel belt corresponded to the properties of a conventionally manufactured belt.
  • a stainless steel band of AISI 316 quality in dimensions of 320 mm wide and 8 mm thick was cast, cooled to room temperature and wound up into a bundle. After a storage period of a few days, this strip was heated in a separate, continuously working annealing and pickling line with an inductively heated oven to 1100 ° C - 1300 ° C, then cooled to approx. 50 ° C with air and water, descaled mechanically and chemically and rewound after rinsing and drying.
  • a stainless steel strip of the quality AISI 430 in the dimensions 350 mm wide and 15 mm thick was cast, then rolled in a hot rolling mill to 7 mm strip thickness and then cooled to room temperature and wound up. After a storage period of several days, this stainless steel strip was annealed again in a separate, continuously working annealing and pickling line, mechanically and chemically descaled and rewound after rinsing with water and drying.
  • a conventionally produced stainless steel strip of quality AISI 304 was cut after hot rolling from a total width of 1450 mm into a strip with a width of 300 mm and a further strip of 1150 mm.
  • the wider strip was conventionally annealed in a continuously working annealing and pickling plant, mechanically and chemically descaled and rewound.
  • the narrow strip was annealed in a discontinuous thrust annealing and thrust pickling system with an inductively heated furnace, then also mechanically and chemically descaled and wound up. When the technological properties were compared, no difference could be found between the two tapes treated differently.
  • a conventionally produced stainless steel strip of the quality AISI 316 was divided after the hot rolling from a total width of 1350 mm into a strip with a width of 350 mm and a strip with a width of 1000 mm. While the wider strip was conventionally annealed, mechanically and chemically descaled and rewound in a continuously working annealing and pickling system, the narrower strip went through a discontinuous thrust annealing and thrust pickling system. After the annealing in the induction heated annealing furnace, the subsequent mechanical and chemical descaling and winding, again no difference could be found in the technological properties of the two strips.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé de fabrication d'ébauches en acier spécial, notamment de bandes en acier spécial, qui comprend le laminage et le recuit du matériau coulé, ainsi que les décalaminage, notamment par décapage dans des substances aqueuses et éventuellement l'enroulage dans le cas d'ébauches d'acier spécial se présentant sous forme de bandes. Afin d'atteindre une plus grande flexibilité en ce qui concerne les qualités d'acier aptes à être traitées et les dimensions des ébauches, il est prévu d'effectuer un traitement thermique du matériau par lots, de préférence un recuit, un refroidissement et ensuite, sans stockage intermédiaire, un décalaminage par lots. Selon un procédé regroupant les étapes suivantes: la coulée, au besoin le laminage du matériau coulé, le refroidissement, ainsi que le décalaminage, notamment par décapage dans des substances aqueuses et au besoin l'enroulage d'ébauches d'acier spécial se présentant sous forme de bandes, il est prévu pour arriver aux mêmes avantages, de procéder à la coulée par lots et de passer ensuite au décalaminage sans stockage intermédiaire. L'invention concerne également des installations permettant la mise en oeuvre du procédé décrit.
EP94924719A 1993-07-13 1994-07-06 Procede et installation permettant de realiser des ebauches en acier special Expired - Lifetime EP0708843B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0137593A AT404907B (de) 1993-07-13 1993-07-13 Verfahren und anlage zum herstellen von edelstahlband
AT1375/93 1993-07-13
PCT/EP1994/002215 WO1995002706A1 (fr) 1993-07-13 1994-07-06 Procede et installation permettant de realiser des ebauches en acier special

Publications (2)

Publication Number Publication Date
EP0708843A1 true EP0708843A1 (fr) 1996-05-01
EP0708843B1 EP0708843B1 (fr) 1997-03-26

Family

ID=3512528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94924719A Expired - Lifetime EP0708843B1 (fr) 1993-07-13 1994-07-06 Procede et installation permettant de realiser des ebauches en acier special

Country Status (11)

Country Link
US (1) US5725696A (fr)
EP (1) EP0708843B1 (fr)
KR (1) KR100207835B1 (fr)
AT (1) AT404907B (fr)
AU (1) AU697873B2 (fr)
BR (1) BR9407126A (fr)
DE (1) DE59402245D1 (fr)
ES (1) ES2100732T3 (fr)
FI (1) FI102548B1 (fr)
RU (1) RU2112812C1 (fr)
WO (1) WO1995002706A1 (fr)

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CN107838193A (zh) * 2016-09-19 2018-03-27 烨联钢铁股份有限公司 复合式冷轧线

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JP2750096B2 (ja) * 1995-05-08 1998-05-13 新日本製鐵株式会社 ストリップ連続鋳造熱間圧延熱処理酸洗設備および酸洗コイルの製造方法
DE19532278B4 (de) * 1995-09-01 2006-07-27 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren zur Herstellung eines kaltgewalzten Bandes in einem Durchlauf
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WO1995002706A1 (fr) 1995-01-26
AT404907B (de) 1999-03-25
AU7491294A (en) 1995-02-13
RU2112812C1 (ru) 1998-06-10
ES2100732T3 (es) 1997-06-16
FI102548B (fi) 1998-12-31
ATA137593A (de) 1998-08-15
US5725696A (en) 1998-03-10
KR960703441A (ko) 1996-08-17
DE59402245D1 (de) 1997-04-30
FI960146A (fi) 1996-03-12
AU697873B2 (en) 1998-10-22
EP0708843B1 (fr) 1997-03-26
FI960146A0 (fi) 1996-01-12
FI102548B1 (fi) 1998-12-31
KR100207835B1 (ko) 1999-07-15
BR9407126A (pt) 1996-09-10

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