EP0531755A1 - Procédé pour la fabrication à chaud de large bande - Google Patents

Procédé pour la fabrication à chaud de large bande Download PDF

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Publication number
EP0531755A1
EP0531755A1 EP92114047A EP92114047A EP0531755A1 EP 0531755 A1 EP0531755 A1 EP 0531755A1 EP 92114047 A EP92114047 A EP 92114047A EP 92114047 A EP92114047 A EP 92114047A EP 0531755 A1 EP0531755 A1 EP 0531755A1
Authority
EP
European Patent Office
Prior art keywords
strip
stand
rolling
hearth furnace
train
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
EP92114047A
Other languages
German (de)
English (en)
Other versions
EP0531755B1 (fr
Inventor
Wolfgang Prof. Dr. Rohde
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 Schloemann Siemag AG
Schloemann Siemag 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6440073&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0531755(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0531755A1 publication Critical patent/EP0531755A1/fr
Application granted granted Critical
Publication of EP0531755B1 publication Critical patent/EP0531755B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • 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
    • B21B45/004—Heating the product
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B21B1/26—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 in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B45/08—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 hydraulically

Definitions

  • the invention relates to a rolling mill for the production of hot strip, consisting of a single or multi-stand roughing mill and a multi-stand finishing mill, which are preceded by a high pressure descaling and a cropping shear.
  • Conventional-type hot strip mills consist of a roughing train and a finishing train.
  • the roughing mill the roughing slab, 200 to 300 mm thick, is rolled out in several passes to an intermediate thickness of 25 to 60 mm.
  • the roughing mill generally consists of several rolling stands. At least one reversing scaffold is required.
  • the belt After the last stitch in the roughing train, the belt is led over the roller table to the finishing train. It goes through the cropping shear and high pressure descaling.
  • the temperature is approximately the same over the entire length of the strip. After tapping in the first stand, however, the rolling temperature in the first stand drops steadily due to the radiation and convection to the environment.
  • coil weights For example, from 20 kg / mm coil width, the temperature drop at the end of the strip is already approx. 150 ° C.
  • finishing train were operated at a constant speed, the appearance with lower temperature levels would also show up in the other stands of the finishing train. Ultimately, the final rolling temperature on the last stand, which is decisive for the technological properties of the strip, would drop significantly from the beginning of the strip to the end of the strip.
  • the speed of the finishing train is continuously increased during the rolling time from the beginning of the strip to the end of the strip.
  • the consequently increasing forming capacity on all stands causes the strip to be reheated, which, if the degrees of acceleration are selected correctly, results in a constant rolling temperature in the last stand.
  • the process is disadvantageous in several ways. Due to the increased forming speeds and the still existing temperature drop in the front stands, there is a noticeable increase in the rolling forces and the rolling moments over the strip length. The resulting changes in the mill stretch and in the bending of the roller sets have to be eliminated by complex control and regulation mechanisms. The amount of heat to be dissipated in the cooling section increases steadily with increasing speed. Depending on the speed, additional cooling zones must be activated, which means that irregularities in the reel temperature reached are unavoidable. Ultimately, uniform cooling of the strip over the length of the strip at the same cooling speeds becomes impossible.
  • the object of the present invention is to change a hot strip mill by suitable measures so that the rolling speed from the beginning of the strip to the end of the strip can be kept constant without changing the rolling temperatures in the individual stands.
  • Skidmarks are cold spots in the supporting strip at regular intervals due to the contact of the preliminary slab with the water-cooled support rails in the slab furnace.
  • the skid marks are largely eliminated as they pass through the heated roller hearth furnace 5, so that there is a significant reduction in the known disturbances in the rolling force and thus in the thickness of the strip to be rolled.
  • Another advantage is the reduction in the drive power required for finishing train 2, since the power required for acceleration is eliminated.
  • the construction of the cooling section 8 is considerably simplified. The cooling at constant speed enables the driving of predetermined temperature curves to achieve certain technological properties, which can be maintained for each strip point over the entire strip length. This opens up new possibilities for optimizing thermomechanical effects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Preparation Of Fruits And Vegetables (AREA)
  • Noodles (AREA)
  • Glass Compositions (AREA)
EP92114047A 1991-09-09 1992-08-18 Procédé pour la fabrication à chaud de large bande Revoked EP0531755B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4129749A DE4129749A1 (de) 1991-09-09 1991-09-09 Walzstrasse zur erzeugung von warmbreitband
DE4129749 1991-09-09

Publications (2)

Publication Number Publication Date
EP0531755A1 true EP0531755A1 (fr) 1993-03-17
EP0531755B1 EP0531755B1 (fr) 1995-12-13

Family

ID=6440073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92114047A Revoked EP0531755B1 (fr) 1991-09-09 1992-08-18 Procédé pour la fabrication à chaud de large bande

Country Status (5)

Country Link
EP (1) EP0531755B1 (fr)
JP (1) JP3262379B2 (fr)
AT (1) ATE131422T1 (fr)
DE (2) DE4129749A1 (fr)
ES (1) ES2081004T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810044A1 (fr) * 1996-05-28 1997-12-03 Nkk Corporation Procédé et dispositif de fabrication d'une tÔle d'acier laminée à chaud
EP0919296A1 (fr) * 1997-11-21 1999-06-02 Sms Schloemann-Siemag Aktiengesellschaft Adaption des trains de laminage chauds pour laminer des bandes minces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559222A1 (de) * 1975-12-30 1977-07-14 Nippon Steel Corp Verfahren zum warmwalzen von band und warmbandwalzwerk
US4444038A (en) * 1981-09-29 1984-04-24 Tippins Machinery Company, Inc. Method of modernizing a hot strip mill
EP0320846A1 (fr) * 1987-12-18 1989-06-21 Hitachi, Ltd. Dispositif et procédé pour laminer à chaud des bandes à partir de brames

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559222A1 (de) * 1975-12-30 1977-07-14 Nippon Steel Corp Verfahren zum warmwalzen von band und warmbandwalzwerk
US4444038A (en) * 1981-09-29 1984-04-24 Tippins Machinery Company, Inc. Method of modernizing a hot strip mill
EP0320846A1 (fr) * 1987-12-18 1989-06-21 Hitachi, Ltd. Dispositif et procédé pour laminer à chaud des bandes à partir de brames

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810044A1 (fr) * 1996-05-28 1997-12-03 Nkk Corporation Procédé et dispositif de fabrication d'une tÔle d'acier laminée à chaud
US5927118A (en) * 1996-05-28 1999-07-27 Nkk Corporation Method for making hot-rolled steel sheet and apparatus therefor
EP0919296A1 (fr) * 1997-11-21 1999-06-02 Sms Schloemann-Siemag Aktiengesellschaft Adaption des trains de laminage chauds pour laminer des bandes minces

Also Published As

Publication number Publication date
JP3262379B2 (ja) 2002-03-04
EP0531755B1 (fr) 1995-12-13
DE59204667D1 (de) 1996-01-25
ES2081004T3 (es) 1996-02-16
ATE131422T1 (de) 1995-12-15
DE4129749A1 (de) 1993-03-11
JPH06315710A (ja) 1994-11-15

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