EP0442864A1 - Méthode et arrangement pour le laminage de barres et fils - Google Patents

Méthode et arrangement pour le laminage de barres et fils Download PDF

Info

Publication number
EP0442864A1
EP0442864A1 EP91890010A EP91890010A EP0442864A1 EP 0442864 A1 EP0442864 A1 EP 0442864A1 EP 91890010 A EP91890010 A EP 91890010A EP 91890010 A EP91890010 A EP 91890010A EP 0442864 A1 EP0442864 A1 EP 0442864A1
Authority
EP
European Patent Office
Prior art keywords
rolling
temperature
rolling stock
cross
sectional area
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
EP91890010A
Other languages
German (de)
English (en)
Other versions
EP0442864B1 (fr
Inventor
Hans Dipl.-Ing. Lösch
Franz Rischka
Johann Eilmer
Karl Strahlhofer
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.)
Voestalpine Boehler Edelstahl GmbH
Original Assignee
Boehler GmbH
Boehler Edelstahl GmbH
Boehler GmbH Germany
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 Boehler GmbH, Boehler Edelstahl GmbH, Boehler GmbH Germany filed Critical Boehler GmbH
Publication of EP0442864A1 publication Critical patent/EP0442864A1/fr
Application granted granted Critical
Publication of EP0442864B1 publication Critical patent/EP0442864B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties of ferrous metals or ferrous alloys 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
    • 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
    • B21B1/166—Rolling wire into sections or flat ribbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/06—Cassettes

Definitions

  • the invention relates to a method and an arrangement for rolling wire and rod material made of metallic materials, wherein the rolling stock is given a reduction in the cross-sectional area of at least 50%.
  • Rolling or drawing processes are used throughout for the production of wire and rod material, raw material with a large cross-sectional area or with a large diameter, in particular over 10 mm, by rolling at high temperatures, preferably over 1000 ° C., and raw material with a small diameter, in particular less than 5 mm, by drawing, usually in several steps, at room temperature, optionally with soft annealing treatments between the drawing steps.
  • wire with a small cross-section is produced by using continuous isothermal rolling in a roll train equipped with heated rolls, followed by a subsequent drawing without intermediate annealing.
  • the preheating and rolling temperature is chosen high in order to avoid material hardening or to save intermediate annealing operations. Disadvantages here are oxidation of the surface, a coarse microstructure and the hardening of higher carbon alloys with rapid cooling from the rolling heat.
  • the rolling stock is rolled in at least two steps, the last step involving a deformation of at least 50% with at least two rolling steps at a temperature which is close to, but above the AR3 temperature of the alloy, is carried out.
  • Disadvantages here are oxidation of the primary material during heating and increased roller wear, as well as structural inhomogeneities over the cross section of the workpiece due to the formation of surface martensite during intermediate cooling.
  • FR-PS-2 579 116 a method is known for the continuous production of metallic profiles, in which a wire or rod material is removed from the storage device and straightened in a roller straightening machine, after which the rolled material is first conductively preheated and then inductively final heated and with is deformed several rolling steps.
  • This process is complex because surface cleaning of the rolling stock, for example by brushing, may be necessary before the conductive heating.
  • unevenness in the surface and therefore punctiform introduction of current into the primary material in this stoving point or areas which are brought to high temperature for a short time and thus harden can be formed.
  • Better heating conditions are to be achieved by means of complex inductive final heating.
  • the straightening process creates in the primary material in places, especially in the near-surface zone of the primary material, plastic deformations or solidified points, which can cause inhomogeneities in the structure of the material when rolled below the transition temperature of the material.
  • the invention has for its object to provide a generic method with which a rolled product having a small cross-sectional area with a high surface quality and with a finer microstructure of the material that is homogeneously formed over the cross section can be produced in a simple manner with advantageous usage properties and good further processability.
  • the process according to the invention is characterized in that the pre-material or rolling stock is pre-deformed in a first step before it is warmed up to a temperature of improved deformability and then rolled, the material properties of which are changed. It has been shown that a reduction in the cross-sectional area of the rolling stock during a pre-deformation, preferably at substantially room temperature, and a consolidation and adjustment of an internal stress state in the material produce new dislocations in the crystal lattice, which cause dislocations to migrate and block and cause a lattice tension .
  • the heating of the rolling stock provided in the second step of the method according to the invention in the case of hardenable steels preferably to a temperature just below the transition temperature or the Ac 1 temperature, the lattice tension is stabilized and in the subsequent rolling deformation even at lower degrees of deformation a special grain refinement is achieved, which is intensified with the further rolling steps. If deep pre-deformation is carried out by rolling with a cross-sectional area reduction of at least 1.8%, the rolled product has a particularly homogeneous, finely structured structure of the material with advantageous usage properties.
  • the pre-deformation significantly improves the transition conditions for the electrical current in the contact area of a conductive heating device, so that no surface and structural defects result from arcing and / or local material overheating.
  • a cross-sectional area constancy of the rolling stock that can be achieved by the pre-deformation additionally results in an easier and more precise temperature control during the conductive heating.
  • the invention also relates to an arrangement for carrying out the method, which is explained in more detail with reference to the schematic drawing.
  • a raw material (7) in the descaled, pickled, ground or the like state of a provision device (1) e.g. removed from a drum (11) or (not shown) from a stack and fed to a pre-shaping device (2).
  • a shaping device can consist of two successive cold rolling stands (21, 22), in which the raw material cross section is reduced and a precise round or flat cross section is rolled.
  • a drawing device or the like can also be used for the pre-deformation, but the start of the method is made more difficult or more complex to carry out.
  • a heating device (3) After the rolled material emerges from the pre-forming device, it has essentially straightness, a smooth surface with a constant cross section or constant cross-sectional shape and a crystal lattice strain in the material.
  • a heating device (3) a circuit is closed by means of contact rollers (31, 32), an electrical current flow from a current source through the rolling stock and resistance heating is achieved.
  • a regulation of the energy supply and the like and / or a control of the method can be carried out with a temperature measuring device (30) which is connected downstream of the heating zone. Provision can also be made for a temperature compensation device (4) to be arranged in front of a deformation device (5).
  • the deformation device (5) preferably consists of at least two roll stands (51, 52) or a cassette rolling mill for a minimum deformation of 50% in total.
  • the finished product is stored by storage device (6), e.g. Drum (61), or stack container added.
  • storage device (6) e.g. Drum (61), or stack container added.
  • the preforming device (2) and the rolling device (5) and, if appropriate, the contact rollers of the heating device (3) are controlled in such a way that the exit speed of the rolling stock after the preforming, the passage speed through the heating device and the entry speed into the rolling device is essentially the same and tensile stresses prevail in the rolling stock lying between them.
  • a temperature-controlled overall control has proven to be advantageous for such a control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
EP91890010A 1990-02-13 1991-01-24 Méthode et arrangement pour le laminage de barres et fils Expired - Lifetime EP0442864B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT319/90 1990-02-13
AT0031990A AT394670B (de) 1990-02-13 1990-02-13 Verfahren und anordnung zum walzen von drahtund stabmaterial

Publications (2)

Publication Number Publication Date
EP0442864A1 true EP0442864A1 (fr) 1991-08-21
EP0442864B1 EP0442864B1 (fr) 1994-06-22

Family

ID=3487419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890010A Expired - Lifetime EP0442864B1 (fr) 1990-02-13 1991-01-24 Méthode et arrangement pour le laminage de barres et fils

Country Status (4)

Country Link
EP (1) EP0442864B1 (fr)
JP (1) JPH04272135A (fr)
AT (2) AT394670B (fr)
DE (1) DE59101963D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030135A1 (fr) * 1995-03-31 1996-10-03 Fintube Limited Partnership Procede de production d'une bande de metal a partir d'une barre laminee a chaud
US5638714A (en) * 1994-04-20 1997-06-17 Fintube Limited Partnership Process for making a strip from a rod
CN104889293A (zh) * 2015-06-10 2015-09-09 天津市安博尔金属制品有限公司 一种清洁球用扁丝成型机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT256006B (de) * 1961-11-25 1967-08-10 Moossche Eisenwerke Ag Verfahren zum Auswalzen von Profilen mittels Kaliberwalzen
DE2352880A1 (de) * 1973-04-09 1974-10-17 Schwermaschb Kom Ernst Thaelma Verfahren zum walzen von draht und stabstahl in duo-walzgeruesten
DE2455922A1 (de) * 1974-11-26 1976-06-10 Inst Metallofiziki Akademii Na Verfahren zum herstellen von langmasserzeugnissen aus warmgewalztem kohlenstoffstahl und nach diesem verfahren hergestellte erzeugnisse
EP0098658A1 (fr) * 1982-07-05 1984-01-18 Lamitref Aluminium Procédé de fabrication de fil métallique, fil métallique ainsi obtenu et unité de production utilisée pour appliquer ce procédé
CH669128A5 (en) * 1986-05-13 1989-02-28 Moos Stahl Ag High yield strength precision wire rod prodn. - by stretching and calibrating, useful for reinforcing rod mfr.
EP0314667A1 (fr) * 1987-10-29 1989-05-03 BÖHLER Gesellschaft m.b.H. Procédé et dispositif pour la fabrication de fils, de barres, de tuyaux et de profilés minces en aciers ou alliages difficilement déformables, notamment en aciers durcissables

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT256006B (de) * 1961-11-25 1967-08-10 Moossche Eisenwerke Ag Verfahren zum Auswalzen von Profilen mittels Kaliberwalzen
DE2352880A1 (de) * 1973-04-09 1974-10-17 Schwermaschb Kom Ernst Thaelma Verfahren zum walzen von draht und stabstahl in duo-walzgeruesten
DE2455922A1 (de) * 1974-11-26 1976-06-10 Inst Metallofiziki Akademii Na Verfahren zum herstellen von langmasserzeugnissen aus warmgewalztem kohlenstoffstahl und nach diesem verfahren hergestellte erzeugnisse
EP0098658A1 (fr) * 1982-07-05 1984-01-18 Lamitref Aluminium Procédé de fabrication de fil métallique, fil métallique ainsi obtenu et unité de production utilisée pour appliquer ce procédé
CH669128A5 (en) * 1986-05-13 1989-02-28 Moos Stahl Ag High yield strength precision wire rod prodn. - by stretching and calibrating, useful for reinforcing rod mfr.
EP0314667A1 (fr) * 1987-10-29 1989-05-03 BÖHLER Gesellschaft m.b.H. Procédé et dispositif pour la fabrication de fils, de barres, de tuyaux et de profilés minces en aciers ou alliages difficilement déformables, notamment en aciers durcissables

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638714A (en) * 1994-04-20 1997-06-17 Fintube Limited Partnership Process for making a strip from a rod
WO1996030135A1 (fr) * 1995-03-31 1996-10-03 Fintube Limited Partnership Procede de production d'une bande de metal a partir d'une barre laminee a chaud
CN104889293A (zh) * 2015-06-10 2015-09-09 天津市安博尔金属制品有限公司 一种清洁球用扁丝成型机

Also Published As

Publication number Publication date
EP0442864B1 (fr) 1994-06-22
JPH04272135A (ja) 1992-09-28
DE59101963D1 (de) 1994-07-28
ATE107546T1 (de) 1994-07-15
ATA31990A (de) 1991-11-15
AT394670B (de) 1992-05-25

Similar Documents

Publication Publication Date Title
DE69710159T2 (de) Verfahren und einrichtung zum herstellen nahtloser stahlrohre
DE69814513T2 (de) Walzverfahren und Walzstrasse für dünne Flacherzeugnisse
EP2044234B1 (fr) Procédé de laminage flexible de bandes d'acier revêtues
EP1613783A2 (fr) Procede de traitement thermo-mecanique de l'acier
EP2421664A1 (fr) Procédé et dispositif de coulée continue d'une brame
EP1462192B1 (fr) Procédé de formage d'une tôle en acier de traitement et dispositif pour la mise en oeuvre du procédé
EP1613449B1 (fr) Procede de fabrication de ressorts helicoidaux ou de stabilisateurs
AT393361B (de) Verfahren und Vorrichtung zur Erzeugung dünner Drähte, Stäbe, Rohre und Profile aus Stählen und Legierungen mit geringem Formänderungsverm¦gen, insbes. aus härtbaren Stählen.
DE10161465C1 (de) Verfahren zum Herstellen von Warmband
DE3885222T2 (de) Werkstoffe mit variabler stärke, geformt mittels schnellverformung.
DE3033501C2 (fr)
EP1812609B1 (fr) Procede et dispositif de façonnage a proximite de la taille finale de produits de depart en forme de fils et de barres
AT394670B (de) Verfahren und anordnung zum walzen von drahtund stabmaterial
DE102011007590B4 (de) Verfahren und Vorrichtung zum Gleitziehbiegen
WO2008006346A2 (fr) Procédé de fabrication d'un demi-produit en tôle adapté pour le formage à chaud
AT506727B1 (de) Verfahren zur wärmebehandlung eines walzguts aus einer aushärtbaren aluminiumlegierung
DE10055338C1 (de) Verfahren zum Herstellen eines bei niedrigen Verformungsgraden kaltverformten Kaltbandes
DE2530470C2 (fr)
DE102021207943A1 (de) Verfahren zum Herstellen eines metallischen Bandes
DE3110043C2 (fr)
EP0496726A2 (fr) Procédé et installation pour la fabrication en continue de fil enroulé en bobines
AT396073B (de) Verfahren zum warmwalzen und waermebehandeln von stabfoermigem material
DE60116885T2 (de) Verfahren zur herstellung eines geschlossenen profils
DE2262140A1 (de) Verfahren zum richten von stahlhalbzeug
DE2337091C3 (de) Verfahren und Anlage zur Wärmebehandlung von Draht, Band, Rohren und Walzprofilen aus Stahl

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19910201

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

D17Q First examination report despatched (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BOEHLER EDELSTAHL GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940622

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19940622

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940622

Ref country code: DK

Effective date: 19940622

Ref country code: BE

Effective date: 19940622

REF Corresponds to:

Ref document number: 107546

Country of ref document: AT

Date of ref document: 19940715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59101963

Country of ref document: DE

Date of ref document: 19940728

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940701

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
EAL Se: european patent in force in sweden

Ref document number: 91890010.1

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961212

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19961216

Year of fee payment: 7

Ref country code: FR

Payment date: 19961216

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961217

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19961224

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970107

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980124

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981001

EUG Se: european patent has lapsed

Ref document number: 91890010.1

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050124