EP0845310B1 - Refroidissement de fil - Google Patents

Refroidissement de fil Download PDF

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Publication number
EP0845310B1
EP0845310B1 EP97119944A EP97119944A EP0845310B1 EP 0845310 B1 EP0845310 B1 EP 0845310B1 EP 97119944 A EP97119944 A EP 97119944A EP 97119944 A EP97119944 A EP 97119944A EP 0845310 B1 EP0845310 B1 EP 0845310B1
Authority
EP
European Patent Office
Prior art keywords
rolling
reduction
stand
distances
stages
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
EP97119944A
Other languages
German (de)
English (en)
Other versions
EP0845310A1 (fr
Inventor
Georg Kleinefeldt
Klaus Dipl.-Ing. Hoffmann
Uwe Dipl.-Ing. Plociennik
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP0845310A1 publication Critical patent/EP0845310A1/fr
Application granted granted Critical
Publication of EP0845310B1 publication Critical patent/EP0845310B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working

Definitions

  • the invention relates to a method and a plant for finish rolling wire in at least one finished block with two-stage reduction stages, in which the wire cross-section by a horizontal and vertical stitch with a given Degree of reduction is reduced and the final rolling speed as well Degree of reduction of each reduction step in accordance with the Material quality and rolling speed is determined by the rolling temperature is, to achieve comparatively higher final rolling speeds with a possibly increased degree of reduction and approximately the same Rolling temperature the distances between the individual reduction stages of a finishing block increased and at least in the area of a part of these distances an intermediate cooling of the rolling stock is made.
  • the invention further relates to a use of the method or the system.
  • the rolling of wire for example from billet material, is usually done in one Rolling mill made up of a roughing street, an intermediate street and a finishing train. That is when entering the finishing train Rolled stock is already largely reduced so that it is almost circular Has cross-section.
  • the rolling stock is then in the finished block with a sequence two-stage reduction stages, each with a horizontal and vertical stitch Rolled to the specified final caliber. This will be a comparative one high final rolling speed achieved, especially for the rolling speeds of the rolling stock in the fore and intermediate line and thus for the rolling capacity of the entire rolling mill is decisive.
  • Cooling device It is known in principle, intercooling within a rolling mill to make the rolling stock, but require those known in the prior art Cooling device each have a significant increase in space requirements System associated with considerable additional costs for investment and operation.
  • DE-A-30 39 101 is a fine beam wire rolling mill for rolling made known by wire, consisting of arranged one behind the other in a rolling line Pre-, intermediate and finished series.
  • the pre-season is in two or more Similar relay sections (each consisting of double frames known per se 90 ° offset from each other).
  • Every double scaffold is a cooling section (water cooling pipe) with controllable cooling intensity arranged downstream; immediately behind it closes one equipped with a loop thrower Heat compensation section.
  • Finished scale from four such double frames, whereby after the last one Cooling section as heat compensation section the route to the reel station Heat compensation is used.
  • EP-A-0 140 592 describes a method for rolling warm wire rod known in which before and after or alternatively also during finish rolling cooling by application in a multi-stand prefabricated group of liquid coolant is carried out on the wire. On his way from the finished group to a downstream laying head, the wire rod liquid cooling devices arranged there passes through, is on the wire rod by inserting through the caliber at least one set of driver rollers Traction applied to ensure a desired increase in wire kink resistance.
  • US 4,182,148 discloses a finishing train for fine steel profiles with a finishing block, comprising four units in two parallel rolling lines, each unit for each of the lines a double stand with one vertical / horizontal rolling step having. Turnouts are provided in front of and behind the blocks in the rolling direction, which turn the rolling stock from one feed roller table into one or the other line and steer back into a common outlet roller table at the outlet.
  • everyone Block has a central drive with a downstream branching gear for the two units.
  • the rolling lines are designed for multi-shift operation, Intercooling is not provided.
  • DE 44 25 930 A1 discloses a fine steel rolling mill, in particular a wire rolling mill, to optimize product quality and performance of the finishing train. at This can be achieved with economical use of investment funds at economical Space requirement and an increase in performance without significant production interruptions as well as modernization can be achieved by using the finishing train at least one two-column standard bloom is upstream or downstream. Intermediate cooling is not provided for in this system either.
  • EP-A-0 560 115 is finally a rolling mill for precision rolling of Wire or rolling stock with a round cross section has become known in which one Finishing mill block with several two-stand reduction stages at least two-stand roughing mill is arranged downstream. Between the finishing block and the finishing block is a tempering cooling section and / or compensation device interposed for the rolling stock.
  • a significantly lower stitch decrease which is between 5 to 15%.
  • the roughing block is thus used as a precision rolling block to To improve the surface quality of the rolling stock and the rolling stock tolerances further constrict.
  • the invention is based on the object in a process and a suitable plant for finish rolling of wire in at least one finishing block to indicate the final feed speed and thus the capacity of the entire rolling mill without impermissible Increase in temperature comparatively significantly and at the same time also the flexibility of the rolling process when adapting a rolling program z.
  • this object is achieved in a method in that finish rolling is carried out in at least two finish blocks, between which set relatively large distances and the rolling stock in the area of these distances is cooled intensely that individual of the two-stand reduction stages are only in use when they are needed and until then, e.g. B. when rolling thick dimensions, are available for "maintenance” and that to achieve greater flexibility in the reduction vote of individual reduction stages among themselves individual of the two-stage reduction stages and preferably the last one is operated as a "sizing level".
  • finish rolling is carried out with at least two finish blocks, between which comparatively large distances can be set, that Rolled material can be cooled intensively in the area of these distances.
  • the dissolution of a known finished block according to the invention in several two-stand units can be a specially selected engine or Gear unit design for the individual units - like tearing apart Rolling families - make them unnecessary.
  • Another advantage results from the fact that individual of the two-stand units are only in use when they are needed and until then (e.g. when rolling thick dimensions) for "maintenance" stand.
  • the conversion time of a prefabricated block can also help additionally available roll stands or units significantly reduced be what is overall essential to availability and overall performance contributes to the rolling mill.
  • the guides can also can be installed more quietly and more precisely.
  • Blocks that are not used can be placed next to the rolling line for one next dimension can be prepared without wasting time. And can continue by appropriate coordination of the purchase conditions among themselves Engine performance of the individual blocks can be optimized.
  • the overall system is more flexible because the decreases between the individual stages or units in a relatively wide range, for example when reducing cross sections in the rough and intermediate street, changed or can be adapted to each other. This can also be used to advantage to the maximum engine power at the determining dimensions to reduce.
  • the invention envisages a use of the method and the method for it Implementation provided especially for finish rolling wires Stainless steel quality.
  • the inventive method and the system enable Increasing the productivity of a wire rolling mill.
  • Figures 1 to 4 is the temperature profile for rolls of tire wire in a roughing area of the plant area between 0 and 50 m, then in an intermediate street between 50 and 150 m in length, as well as in an eight-stand Prefabricated block with two-stand units between 150 and 200 m length shown.
  • the final diameter is 5.5 each mm.
  • the core temperature reaches according to Figure 1 when the Rolled stock at 1000 ° C in the first roughing stand at the beginning of the Intermediate rolling at approx. 66 m a temperature peak of 1050 ° C, after which the wire emerges from the last
  • the core temperature drops to approx. 825 ° C and in the eight-stand prefabricated block at approx. 169 m at 1035 ° C increases and by means of cooling when exiting the last Scaffolding is lowered to approx. 855 ° C.
  • the strongest Temperature fluctuations naturally result in Surface temperatures with difference amounts of approximately 300 ° C of individual cooling levels.
  • FIGS. 1 and 2 are boundary conditions and total length of the road with Fig. 1 up to 150 m length of the rough and intermediate road identical.
  • the finished block broken down into five two-stand blocks with intermediate cooling.
  • the core temperature in the rolling stock is thus around on average about 70 ° C, namely from 1035 ° C of FIG. 1 to 965 ° C 2.
  • the final temperatures at 225 m length are 855. 835, 825 ° C (core temperature, average temperature, Surface temperature).
  • the temperature curves of FIGS. 1 and 2 correspond to a final rolling speed under otherwise the same Parameters of material quality and the rolling program of 105 m / s.
  • Figures 3 and 4 show temperature curves same rolling program, starting material and end product, however with 150 m / s rolling speed. It is in the Intermediate road reaches a maximum temperature of 1070 °, that at 870 ° C when the rolling stock enters the finished block (Core), 845 ° C (average temperature) and 830 ° C (Surface temperature) is reduced in several cooling stages. By dissolving the finished block in two-stand units with Intercooling is achieved at the same Production parameters the maximum core temperature in Finished block at a system length of approx. 180 m not above 1060 ° C increases. Surrendered after leaving the last finishing stand for the core temperature 960 ° C, for the Average temperature 940 ° C and for that Surface temperature 925 ° C.
  • FIG. 5 shows a typical course of the core average and surface temperatures with positive effects of Method and plant according to the invention.
  • a total of five two-stand 10 in an extension of 150 to 350 m arranged at intervals of 40 m on average and with Intercooling equipped. This ensures that the Core temperature at the top, for example at 280 m 865 ° C does not exceed and the average temperature itself approximates at 800 ° C.
  • the other system parameters correspond to the course of the curves from FIGS. 1 to 4, however, the rolling speed is 150 m / s.
  • Figure 6 shows the temperature simulation of a stainless steel mill when rolling a Ni-based alloy with a Rolling speed of 20 m / s.
  • the Temperature peak in the finished block at approx. 275 m in the range of 1270 ° C.
  • Figure 7 shows the same rolling process as Fig. 6, but with a final rolling speed of 30 m / s.
  • the Temperature peak in the finished block at approx. 275 m in the range of 1340 ° C.
  • FIG. 9 shows the same rolling parameters and one with three two-stand units with cooling more powerful exploded finished block a reduction in Peak temperature at 240 m at 1275 ° C. That is the proof provided that a realization is comparatively higher Final rolling speeds with possibly increased Degree of reduction and almost constant rolling temperature or reduced rolling temperature succeeds if after the Invention the distances between individual reduction stages or units of a finished block increased and at least in Area of part of these distances an intercooling of the Rolled good is made. It becomes essential Production increase with the use of effective economic Medium reached, with the Vor pieces and insectsse slightly be adapted and substantially preserved.
  • Figure 10 shows a in the form of a block diagram Prefabricated block (1) with five two-stand units (2a) vertical, (2b) horizontal to (6a) vertical, (6b) horizontal. Each of these units (2 to 6) is a cooling or Downstream cooling section (20, 30, 40, 50, 60).
  • the after the Invention thus achievable temperature curve for core, Average and surface is favorably lowered and corresponds approximately to the curve diagram of FIG. 5.
  • This Designing a prefabricated block will be an optimal solution achieved the task set at the beginning.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Surgical Instruments (AREA)
  • Insulated Conductors (AREA)

Claims (4)

  1. Procédé de laminage de finition de fil métallique en au moins un bloc de finition (1) comportant des étapes de réduction à deux cages dans lesquelles la section transversale du fil est réduite par respectivement une table horizontale et verticale avec un degré de réduction prédéfini et la vitesse de laminage final ainsi que le degré de réduction de chaque étape de réduction (2a, 2b à 6a, 6b) sont définis en fonction de la température de laminage s'installant en fonction de la qualité de la matière et de la vitesse de laminage, les écarts entre les différentes étapes de réduction (2a, 2b à 6a, 6b) d'un bloc de finition (1) augmentant pour atteindre des vitesses de laminage final comparativement plus élevées avec un degré de réduction le cas échéant accru et une température approximativement stable et un refroidissement intermédiaire du produit à laminer étant réalisé du moins dans le secteur d'une partie de ces écarts, caractérisé en ce que
    le laminage de finition est réalisé dans au moins deux blocs de finition (1) entre lesquels sont fixés des écarts comparativement grands et que le produit à laminer est refroidi intensivement dans le secteur de ces écarts,
    certaines des étapes de réduction à deux cages (2a, 2b à 6a, 6b) ne sont utilisées que si on a besoin et qu'elles sont jusque là à disposition, par exemple lors du laminage de dimensions épaisses, pour la maintenance, et
    que, pour obtenir une plus grande souplesse dans la définition mutuelle de la réduction des différents étapes de réduction (2a, 2b à 6a, 6b), certaines des étapes de réduction à deux cages (2a, 2b à 6a, 6b) et de préférence la dernière fonctionnent comme « étape de dimensionnement ».
  2. Procédé selon la revendication 1, caractérisé en ce que le total des opérations de chauffage dans les passes est réduit grâce à la décomposition d'un bloc de finition à plusieurs cages en étapes de réduction individuelles à deux cages écartées les uns des autres (2a, 2b à 6a, 6b).
  3. Installation pour la réalisation du procédé selon une des revendications précédentes pour le laminage de finition de fil métallique dans une ligne de finition à plusieurs cages comportant au moins des étapes de réduction à deux cages (2a, 2b à 6a, 6b) regroupées en au moins un bloc de finition (1), qui comprennent respectivement une cage horizontale (2a - 6a) et verticale (2b - 6b), les étapes de réduction (2a, 2b à 6a, 6b) présentant entre elles des écarts comparativement accrus et des dispositifs (20, 30, 40, 50) de refroidissement intermédiaire de la marchandise à laminer en transit étant disponibles dans le secteur d'au moins un de ces écarts, caractérisée en ce que
    la ligne de finition consiste en au moins deux blocs de finition à plusieurs cages (1), qui présentent de l'un à l'autre un écart accru avec une possibilité de refroidissement intensif de la marchandise à laminer dans le secteur de ces écarts ;
    les étapes de réduction à deux cages (2a, 2b à 6a, 6b) peuvent être supprimées individuellement de la ligne de laminage en cas de non-usage et être préparées près de la ligne de laminage pour un autre usage et
    que les étapes de réduction individuelles (2a, 2b à 6a, 6b) et de préférence la dernière étape respective de réduction (6a, 6b) sont conçues comme une « étape de dimensionnement ».
  4. Utilisation du procédé et de l'installation selon les revendications 1 à 3 pour le laminage de finition de fil métallique en acier de qualité inoxydable.
EP97119944A 1996-11-27 1997-11-14 Refroidissement de fil Expired - Lifetime EP0845310B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19649022A DE19649022A1 (de) 1996-11-27 1996-11-27 Drahtkühlung
DE19649022 1996-11-27

Publications (2)

Publication Number Publication Date
EP0845310A1 EP0845310A1 (fr) 1998-06-03
EP0845310B1 true EP0845310B1 (fr) 2003-07-16

Family

ID=7812858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119944A Expired - Lifetime EP0845310B1 (fr) 1996-11-27 1997-11-14 Refroidissement de fil

Country Status (4)

Country Link
US (1) US5907967A (fr)
EP (1) EP0845310B1 (fr)
AT (1) ATE245059T1 (fr)
DE (2) DE19649022A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810215A1 (de) * 1998-03-10 1999-09-16 Schloemann Siemag Ag Kühlschacht für einen Rollgang
DE19960638A1 (de) * 1999-12-16 2001-06-28 Sms Demag Ag Wasserkühlstrecke für Draht
CN109174979A (zh) * 2018-08-21 2019-01-11 唐山市德龙钢铁有限公司 一种提高线材成材率的水冷段布置方式
DE102020205252A1 (de) * 2020-04-24 2021-10-28 Kocks Technik Gmbh & Co Kg Vorrichtung zum Kühlen von Langprodukten und Verfahren zum Kühlen eines Langproduktes unter Verwendung derselben
CN112935008B (zh) * 2021-01-25 2023-04-28 陕西鼎益科技有限公司 一种新型特种高温合金丝材热轧制工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5617104A (en) * 1979-07-23 1981-02-18 Nippon Steel Corp Method and apparatus for rolling bar or rod
US4274273A (en) * 1979-10-03 1981-06-23 General Electric Company Temperature control in hot strip mill
DE3039101A1 (de) * 1980-10-16 1982-05-13 Schloemann-Siemag AG, 4000 Düsseldorf Anordnung einer kontinuierlich arbeitenden feinstahl-drahtwalzstrasse zum auswalzen von draht oder rundquerschnitten aus edelstaehlen oder hochwertigen legierungen
US4527408A (en) * 1983-10-31 1985-07-09 Morgan Construction Company Method and Apparatus for cooling and handling hot rolled steel rod in direct sequence with a high speed rolling operation
CA2066475C (fr) * 1991-05-06 1997-06-03 Terence M. Shore Methode et appareil de laminage a chaud en continu d'articles en metal ferreux de forme allongee
DE4207298A1 (de) * 1992-03-07 1993-09-09 Schloemann Siemag Ag Verfahren und walzwerk zum praezisionswalzen von draht bzw. von walzgut mit rundquerschnitt

Also Published As

Publication number Publication date
EP0845310A1 (fr) 1998-06-03
ATE245059T1 (de) 2003-08-15
DE19649022A1 (de) 1998-05-28
US5907967A (en) 1999-06-01
DE59710439D1 (de) 2003-08-21

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