US3429164A - Method of processing ferrous strip - Google Patents

Method of processing ferrous strip Download PDF

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Publication number
US3429164A
US3429164A US541259A US3429164DA US3429164A US 3429164 A US3429164 A US 3429164A US 541259 A US541259 A US 541259A US 3429164D A US3429164D A US 3429164DA US 3429164 A US3429164 A US 3429164A
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United States
Prior art keywords
strip
flexing
rolls
flat
fluting
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
US541259A
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English (en)
Inventor
Kasimir Oganowski
Marvin B Pierson
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Armco Inc
Original Assignee
Armco Inc
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Filing date
Publication date
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Publication of US3429164A publication Critical patent/US3429164A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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
    • 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
    • B21B2015/0071—Levelling the rolled product
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0231—Warm rolling
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension

Definitions

  • This invention relates to the processing of ferrous strip, and more specifically to the production of a non-fluting table-flat strip. It has been found that the invention has great and particular utility in connection with the processing of metallic coated strip; however, it will be understood that no limitation is intended, and that the invention is equally applicable to the processing of un-coated strip.
  • the primary object of this invention is the provision of a process for continuously producing non-fluting, table-flat strip with or without alteration of its surface texture.
  • table-flat will be used to describe a strip or sheet which, when observed visually, has an imperceptible deviation from a horizontal flat surface.
  • a 48" by 96" sheet would be considered table-flat if the deviation from a horizontal flat surface would be less than 4; inch.
  • non-fluting table-flat strip could be produced, but only in a two step operation. That is, by following the teachings of the above noted Ward patent, or of US. Patent 2,797,476, in the name of Tadeusz Sendzimir, a manufacturer obtains a non-fluting strip. This strip is then coiled, usually cut into sheets, and then subjected to any of the conventional processes and equipment designed for producing flat stock. As is well known, such conventional equipment includes both the roller levelers, and the stretcher levelers.
  • Roller leveling is designed to produce table-flat strip, but the desired result is often not achieved.
  • successful operation of a roller leveler requires a high degree of skill on the part of the operator, and re quires continuous attention.
  • the roller leveling operation cannot effect a full correction. It is therefore to be preferred that a continuous stretcher leveling step be used.
  • the inst-ant invention will permit the production of non-fluting table-flat strip at a lower cost, in view of the elimination of several of the steps necessary according to the prior art, and in the elimination of the attendant equipment.
  • a further object of this invention is to provide a process for producing strip having the characteristics noted above, which is flexible to the extent that the surface texture of the strip can be altered or not, as desired, and required.
  • this invention contemplates a process for the continuous treatment of a ferrous met-a1 strip which includes the steps of first working the strip to the extent that its tendency to form flutes or stretcher strains is substantially eliminated, and thereafter continuously leveling the strip.
  • the tendency of the strip to formflutes will be substantially eliminated by a hot flexing operation followed by an immediate quench.
  • the stock as thus treated is then passed into a continuous stretcher leveling arrangement.
  • the resulting product is a table-flat strip free of stretcher strains.
  • the strip to be treated is indicated at 10. It Will be understood that prior to the practice of the in stant invention, the strip can be treated in any desired way. According to preferred practices of the invention, the strip will have been coated with one of the Well known, conventional coating metals according to the well known Sendzimir process described in Us. Patent No. 2,110,893.
  • the strip 10 is first subjected to a hot flexing operation on the three roll bender 12 in order to stress at least the outer fibers of the strip through their yield point.
  • the temperature range for the flexing operation is 400 F. to 650 F., and it will be understood that the strip can be brought to this temperature in any conventional way. In certain cases, the residual heat from the hot coating operation will be sufficient.
  • the diameter of the rolls in the bender 12 is critical with respect to strip gage. Experimentation has shown that the maxi-mum roll diameter which can be used successfully is 525 times the strip thickness. As a practical matter, the maximum factor would be 500.
  • the hot flexing operation is carried out at a temperature in the range of substantially 400 F. to 650 F.
  • the lower temperature limit for the flexing operation has been found to vary in an exponential relationship with the degree of strain introduced by the flexing rolls. This relationship may be expressed by the following formula:
  • the upper temperature limit for the hot flexing operation is fixed by the ability to quench the strip before aging occurs. That is, the hot flexing step if followed immediately by quench cooling as schematically shown at 14. This quench cooling should be sufficient to reduce the temperature of the strip to less than 150 F.
  • the continuous stretcher leveling is accomplished by stretching the strip beyond its elastic limit between two tension bridles indicated at 16 and -18.
  • the bridles 16 and 18 each have five rolls, but it will be understood that more or less rolls may be de sirable under varying circumstances.
  • These tension bridles are mechanically coupled together to provide a desired adjustable strip elongation; that is, elongation is determined by the speed differential between bridles. The precise elongation is determined and obtained by engaging the stretch rolls 20 which are disposed ahead of the tension bridle 18.
  • the strip Upon leaving the tension bridle 18, the strip passes over an inspection table 22. 'It will be observed that at a this stage in the operation, the strip is not under tension. (Note the loop 24 after the inspection table.) This makes it possible to visually, or by the use of instruments, determine, oheck, and control flatness of the resulting product.
  • the foregoing process will produce the desired prodnet, and will preserve the original finish of the strip. In some cases, however, it is desirable to effect an alteration of the surface.
  • the alteration is eflected by the use of a temper mill, wherein the surface finish is largely controlled by the surface texture of the work rolls. It is well known by the skilled worker in the art that smoothground rolls impart a bright, dense surface finish, while rough-ground or shot-blasted rolls impart a substantially rougher surface.
  • smoothground temper rolls disposed as indicated at 26, just ahead of the stretch rolls 20.
  • a continuous method of treating coated ferrous metal strip comprising the steps of:
  • a process for producing table-flat ferrous strip substantially free from flutes and stretcher strains comprising the steps of:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)
  • Package Frames And Binding Bands (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US541259A 1966-04-08 1966-04-08 Method of processing ferrous strip Expired - Lifetime US3429164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54125966A 1966-04-08 1966-04-08

Publications (1)

Publication Number Publication Date
US3429164A true US3429164A (en) 1969-02-25

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US541259A Expired - Lifetime US3429164A (en) 1966-04-08 1966-04-08 Method of processing ferrous strip

Country Status (7)

Country Link
US (1) US3429164A (cs)
BE (1) BE696725A (cs)
DE (1) DE1533953C3 (cs)
ES (1) ES338960A1 (cs)
GB (1) GB1149671A (cs)
PL (1) PL71135B1 (cs)
SE (1) SE348228B (cs)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686921A (en) * 1970-03-16 1972-08-29 Wallace Expanding Machines Method and apparatus for processing coiled sheet metal
US3762198A (en) * 1972-03-24 1973-10-02 Gen Electric Apparatus and methods for handling strip material
US4074555A (en) * 1975-08-21 1978-02-21 Bwg Bergwerk-Und Walzwerk Maschinenbau Gesellschaft Mit Beschrankter Haftung Method of and apparatus for improving hot-rolled sheet-metal strips
US4528830A (en) * 1982-06-30 1985-07-16 Sumitomo Metal Industries, Ltd. Method for changing widthwise distribution of thickness of metal strip
US4680952A (en) * 1984-02-17 1987-07-21 Max Kammerer Gmbh Process and apparatus for the production of strands for Bowden cables
US4765169A (en) * 1987-11-02 1988-08-23 The Monarch Machine Tool Co. Method of tension leveling nonhomogeneous metal sheet
US4826138A (en) * 1984-02-24 1989-05-02 Van Dorn Company Apparatus for heat treating steel plates
US5329798A (en) * 1989-09-18 1994-07-19 Hitachi, Ltd. Leveling device and leveling method
EP0707905A1 (de) * 1994-10-22 1996-04-24 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren zum Herstellen von Blechtafeln, insbesondere grossformatigen Blechtafeln, und Vorrichtung
EP0785286A1 (en) * 1996-01-16 1997-07-23 Draftex Industries Limited Apparatus and methods for rolling and stress relaxing a metal strip
US5724845A (en) * 1996-08-12 1998-03-10 Kawasaki Steel Corporation Bowing correction apparatus for temper rolling mill
EP1230993A3 (de) * 2001-02-07 2005-01-26 SMS Demag AG Vorrichtung zur Verbesserung der Planheit von gewalztem Band, insbesondere von Stahlband
US20090282883A1 (en) * 2008-05-16 2009-11-19 Andreas Noe Method of and apparatus for leveling strip
US20170095848A1 (en) * 2015-10-02 2017-04-06 The Material Works, Ltd. Cut-To-Length Steel Coil Processing Line With Stretcher Leveler And Temper Mill

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797476A (en) * 1952-06-17 1957-07-02 Sendzimir Tadeusz Process and apparatus for treating metallic strips
US3050847A (en) * 1958-04-01 1962-08-28 Inland Steel Co Method of preventing the surface staining of cold rolled steel
US3171464A (en) * 1962-09-04 1965-03-02 Voss Engineering Co Method of flattening metal strip or sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797476A (en) * 1952-06-17 1957-07-02 Sendzimir Tadeusz Process and apparatus for treating metallic strips
US3050847A (en) * 1958-04-01 1962-08-28 Inland Steel Co Method of preventing the surface staining of cold rolled steel
US3171464A (en) * 1962-09-04 1965-03-02 Voss Engineering Co Method of flattening metal strip or sheet

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686921A (en) * 1970-03-16 1972-08-29 Wallace Expanding Machines Method and apparatus for processing coiled sheet metal
US3762198A (en) * 1972-03-24 1973-10-02 Gen Electric Apparatus and methods for handling strip material
US4074555A (en) * 1975-08-21 1978-02-21 Bwg Bergwerk-Und Walzwerk Maschinenbau Gesellschaft Mit Beschrankter Haftung Method of and apparatus for improving hot-rolled sheet-metal strips
US4528830A (en) * 1982-06-30 1985-07-16 Sumitomo Metal Industries, Ltd. Method for changing widthwise distribution of thickness of metal strip
US4680952A (en) * 1984-02-17 1987-07-21 Max Kammerer Gmbh Process and apparatus for the production of strands for Bowden cables
US4826138A (en) * 1984-02-24 1989-05-02 Van Dorn Company Apparatus for heat treating steel plates
US4765169A (en) * 1987-11-02 1988-08-23 The Monarch Machine Tool Co. Method of tension leveling nonhomogeneous metal sheet
US5329798A (en) * 1989-09-18 1994-07-19 Hitachi, Ltd. Leveling device and leveling method
EP0707905A1 (de) * 1994-10-22 1996-04-24 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren zum Herstellen von Blechtafeln, insbesondere grossformatigen Blechtafeln, und Vorrichtung
US5579658A (en) * 1994-10-22 1996-12-03 Bwg Berkwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for producing large metal plates
EP0785286A1 (en) * 1996-01-16 1997-07-23 Draftex Industries Limited Apparatus and methods for rolling and stress relaxing a metal strip
US5724845A (en) * 1996-08-12 1998-03-10 Kawasaki Steel Corporation Bowing correction apparatus for temper rolling mill
EP1230993A3 (de) * 2001-02-07 2005-01-26 SMS Demag AG Vorrichtung zur Verbesserung der Planheit von gewalztem Band, insbesondere von Stahlband
US20090282883A1 (en) * 2008-05-16 2009-11-19 Andreas Noe Method of and apparatus for leveling strip
US8291738B2 (en) * 2008-05-16 2012-10-23 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for leveling strip
US20170095848A1 (en) * 2015-10-02 2017-04-06 The Material Works, Ltd. Cut-To-Length Steel Coil Processing Line With Stretcher Leveler And Temper Mill
US10022760B2 (en) * 2015-10-02 2018-07-17 The Material Works, Ltd. Cut-to-length steel coil processing line with stretcher leveler and temper mill

Also Published As

Publication number Publication date
PL71135B1 (cs) 1974-04-30
GB1149671A (en) 1969-04-23
SE348228B (cs) 1972-08-28
DE1533953C3 (de) 1978-11-16
DE1533953A1 (de) 1970-07-16
BE696725A (cs) 1967-10-06
DE1533953B2 (de) 1978-03-23
ES338960A1 (es) 1968-07-01

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