EP0630295B1 - Verfahren und vorrichtung zur verminderung der zunderbildung beim warmumformen von metall, insbesondere von stahl - Google Patents

Verfahren und vorrichtung zur verminderung der zunderbildung beim warmumformen von metall, insbesondere von stahl Download PDF

Info

Publication number
EP0630295B1
EP0630295B1 EP93905334A EP93905334A EP0630295B1 EP 0630295 B1 EP0630295 B1 EP 0630295B1 EP 93905334 A EP93905334 A EP 93905334A EP 93905334 A EP93905334 A EP 93905334A EP 0630295 B1 EP0630295 B1 EP 0630295B1
Authority
EP
European Patent Office
Prior art keywords
inert gas
metal
roll
steel
roll gap
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
EP93905334A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0630295A1 (de
Inventor
Klaus GRÜTZMACHER
Vladimir JÄGER
Friedrich Raffauf
Klaus Ulrich
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.)
ArcelorMittal Bremen GmbH
Original Assignee
Kloeckner Stahl GmbH
Stahlwerke Bremen 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 Kloeckner Stahl GmbH, Stahlwerke Bremen GmbH filed Critical Kloeckner Stahl GmbH
Publication of EP0630295A1 publication Critical patent/EP0630295A1/de
Application granted granted Critical
Publication of EP0630295B1 publication Critical patent/EP0630295B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/009—Gas treatment of work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
    • B21C43/02—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass combined with or specially adapted for use in connection with drawing or winding machines or apparatus
    • B21C43/04—Devices for de-scaling wire or like flexible work
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Definitions

  • the invention relates to a method and an apparatus for reducing scale formation during hot rolling of metal, in particular steel, in which the heated metal is plastically deformed for a short time under high pressure with an elastic component and can then relax, the rolling stock on the outlet side using several against the Rolled nozzles, which are taken up by a device for supplying inert gas, are covered with inert gas.
  • a method and device is known from JP-A-61-123403. It is also known from US-A-3,613,421 that blowing metal from a hot rolling mill is blown with inert gas in order to prevent the formation of oxide dust.
  • the inert gas coverage of the leaking metal is practically limited to the nip itself or a short path thickness immediately following it.
  • Nitrogen is preferably used as the inert gas, with which the material leaving the roll gap is blown over a certain distance during the hot rolling of steel.
  • this distance corresponds to the 'relaxation phase' of the steel strip after its plastic deformation in the nip; in any case, it has been shown that naturally a (normally thin) scale build-up occurs after this certain distance, but no more of the suspended matter is emitted.
  • the blowing direction of the inert gas is preferably set obliquely against the feed direction of the steel.
  • the inert gas is also blown into the free spaces of the roll gap lying to the side of the rolling stock.
  • a device for carrying out the method according to the invention is characterized according to the invention by the features according to claim 3. It is preferably provided that the device has elements which at least enclose the material to be formed during the relaxation phase, and on the inside of which the inert gas, which is at a higher than atmospheric pressure, can be supported. It has been shown that a certain inert gas pressure is required in order to bring it sufficiently close and intensively to the surface of the material to be formed, despite its spontaneous heating when it approaches the material to be formed. However, such pressure of the inert gas cannot be built up without at least largely enclosing the material to be formed during the expansion phase.
  • the enclosing elements can be parts of the roll stand of a roll stand on the exit side.
  • FIG. 1 Only sections of the work rolls 2, 3 and support rolls 4, 5 held in the stand 1 of a roll stand are shown in FIG. 1 shown in a schematic side view.
  • the heated rolling stock passes through the roll gap 6 from left to right in FIG. 1; the elements belonging to the rolling stand shown in FIG. 1 are therefore on the output side of the rolling stock.
  • These elements include, below the hot strip 7, a roller table consisting of the two parts 8a and 8b with a scraper 9 resting on the work roll 3, and a cooling water distributor 10 below the roll table 8a.
  • the cooling water delivered by these to the work roll 3 is indicated at 11.
  • a water tank 12 can be seen in FIG. 1, the underside 16 of which is provided with a scraper 13 in the area of the work roll 2.
  • Distributors 14 for the cooling water 15, which is sprayed onto the work roll 2 are arranged in the water box 12.
  • the scraper 13 prevents the cooling water from draining onto the hot strip 7; the cooling water runs off to the side in the area of the cheeks of the stand 1 and is discharged below the roll stand.
  • Both in the area of the roller table 8 and the top-side water box 12 are devices for blowing nitrogen into the largely enclosed by the table and the water box with their wipers 9, 13 and the side components of the stand 1, by the hot strip 7 immediately after leaving the roll gap 6 through room provided.
  • a pipe 20 running transversely to the rolling direction leads through a hose line 21 to a double pipe transverse distributor 22, which distributes it to a plurality of relatively thin nozzle pipes 23, which have their openings 24 Push through the underside 16 of the water tank 12 in a sealed manner and direct an inert gas jet 25 at an angle against the feed direction of the hot strip 7 against the hot strip 7.
  • Another hose connection 26 leads from the tube 20 inert gas to a transverse distributor 27 arranged in the feed direction of the hot strip behind the water tank 12, which is provided with various nozzle openings 28 distributed over the width of the hot strip 7 and in turn emits inert gas jets 29 at an angle to the feed direction of the hot strip 7 .
  • a transverse distributor 27 arranged in the feed direction of the hot strip behind the water tank 12, which is provided with various nozzle openings 28 distributed over the width of the hot strip 7 and in turn emits inert gas jets 29 at an angle to the feed direction of the hot strip 7 .
  • a double pipe cross distributor 42 receives the inert gas from a pipe 40 via a hose 41 and distributes it to a plurality of nozzle pipes 43 distributed over the width of the roll stand on nozzles 44 which pass through the lower roller table 8a and inert gas jets which are inclined against the feed direction of the hot strip 7 45 against this.
  • hoses 46, 47, cross distributors 48, 49 are connected to the pipe 40 and direct inert gas jets 50, 51 (through the spaced-apart individual elements of the roller table 8b; cf. Hot strip 7.
  • the passage of the hot strip 7 through the work rolls 2, 3 is illustrated schematically in FIG. 4.
  • the hot strip 7 comes from the left with the initial thickness s and is plastically deformed in the roll gap 6 to a smaller thickness, which has the size s 1 at some distance from the roll gap 6.
  • the scale layer 7a which surrounds the hot strip 7 on all sides before entering the roll gap 6, can be seen in FIG. 4 to the left of the roll gap. This scale layer is torn open and blown off in the course of the wedge-shaped deformation; this is indicated in a greatly enlarged manner in FIG. 4.
  • the zone E of the relaxation phase extends over a certain distance which adjoins the roll gap 6 in the feed direction and which is identified by “E” in FIG. 4 on the top and bottom of the hot strip 7.
  • inert gas preferably nitrogen - so that no new scale can form on the strip there.
  • the metal surface reacts with the oxygen in the ambient air and forms a (new) scale layer 7b of comparatively small thickness.
  • the inert gas is also blown into the free spaces 52 of the roll gap 6 located next to the hot strip 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
EP93905334A 1992-03-14 1993-03-10 Verfahren und vorrichtung zur verminderung der zunderbildung beim warmumformen von metall, insbesondere von stahl Expired - Lifetime EP0630295B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4208208A DE4208208C2 (de) 1992-03-14 1992-03-14 Verfahren und Vorrichtung zur Verminderung der Zunderbildung beim Warmumformen von Metall, insbesondere von Stahl
DE4208208 1992-03-14
PCT/EP1993/000545 WO1993018869A1 (de) 1992-03-14 1993-03-10 Verfahren und vorrichtung zur verminderung der zunderbildung beim warmumformen von metall, insbesondere von stahl

Publications (2)

Publication Number Publication Date
EP0630295A1 EP0630295A1 (de) 1994-12-28
EP0630295B1 true EP0630295B1 (de) 1996-06-05

Family

ID=6454076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93905334A Expired - Lifetime EP0630295B1 (de) 1992-03-14 1993-03-10 Verfahren und vorrichtung zur verminderung der zunderbildung beim warmumformen von metall, insbesondere von stahl

Country Status (9)

Country Link
EP (1) EP0630295B1 (enrdf_load_stackoverflow)
CN (1) CN1078179A (enrdf_load_stackoverflow)
AU (1) AU3632293A (enrdf_load_stackoverflow)
DE (2) DE4208208C2 (enrdf_load_stackoverflow)
ES (1) ES2088276T3 (enrdf_load_stackoverflow)
PL (1) PL170068B1 (enrdf_load_stackoverflow)
TW (1) TW227019B (enrdf_load_stackoverflow)
WO (1) WO1993018869A1 (enrdf_load_stackoverflow)
ZA (1) ZA931765B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936010B4 (de) * 1999-08-04 2009-04-30 Sms Demag Ag Verfahren und Vorrichtung zum Unterdrücken von Zunderbildung insbesondere Sekundärzunder beim Warmwalzen von Brammen

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953230C2 (de) * 1999-11-04 2003-08-28 C D Waelzholz Produktionsgmbh Kaltwalzverfahren
US6675622B2 (en) 2001-05-01 2004-01-13 Air Products And Chemicals, Inc. Process and roll stand for cold rolling of a metal strip
KR101186761B1 (ko) 2006-08-28 2012-10-08 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 극저온 액체 분사용 분사 장치 및 이 장치와 관련된 분사 방법
CN100571925C (zh) * 2006-12-29 2009-12-23 黄文结 一种在金属坯料热温锻造加工时减少温热锻造氧化皮膜生成的方法
CN101811149B (zh) * 2010-04-14 2012-05-23 新兴铸管股份有限公司 一种高合金无缝钢管的制造方法
CN102367508A (zh) * 2011-09-16 2012-03-07 山西太钢不锈钢股份有限公司 一种提高热轧钢卷表面质量的方法
CN102728632B (zh) * 2012-05-25 2014-05-28 莱芜钢铁集团有限公司 减少冷轧产品表面的乳化液黑斑的方法
CN105817480B (zh) * 2015-01-07 2018-06-01 宝山钢铁股份有限公司 一种抑制轧辊氧化速率的装置及其使用方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230897A (en) * 1938-06-23 1941-02-04 Cold Metal Process Co Rolling mill guide
US3613421A (en) * 1969-06-17 1971-10-19 Theodore A Repper Method and apparatus for eliminating iron oxide dust
FR2565511B1 (fr) * 1984-06-07 1988-05-13 Air Liquide Procede et installation de protection d'un metal solide contre l'oxydation pendant une operation de laminage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936010B4 (de) * 1999-08-04 2009-04-30 Sms Demag Ag Verfahren und Vorrichtung zum Unterdrücken von Zunderbildung insbesondere Sekundärzunder beim Warmwalzen von Brammen

Also Published As

Publication number Publication date
CN1078179A (zh) 1993-11-10
DE59302830D1 (de) 1996-07-11
ZA931765B (en) 1993-09-27
AU3632293A (en) 1993-10-21
DE4208208C2 (de) 1994-12-15
TW227019B (enrdf_load_stackoverflow) 1994-07-21
EP0630295A1 (de) 1994-12-28
ES2088276T3 (es) 1996-08-01
DE4208208A1 (de) 1993-09-16
WO1993018869A1 (de) 1993-09-30
PL170068B1 (en) 1996-10-31

Similar Documents

Publication Publication Date Title
EP3092088B1 (de) Schmierung mit spritzdüsen mit mehreren öleintrittsöffnungen
EP3016754B2 (de) Verfahren zum warmwalzen von stahlband
EP0630295B1 (de) Verfahren und vorrichtung zur verminderung der zunderbildung beim warmumformen von metall, insbesondere von stahl
EP0608286B1 (de) Warmwalzverfahren und warmwalzwerk für metallband
DE102006019544A1 (de) Verfahren und Vorrichtung zur Entzunderung von Dünnbrammen und Bändern in Warmbandstraßen, Bandbehandlungsanlagen oder dergleichen
EP3097218B1 (de) Verfahren und anlage zum schmelztauchbeschichten von warmgewalztem stahlband
WO2013068196A1 (de) Verfahren und vorrichtung zum schmelztauchbeschichten eines metallbands mit einem metallischen überzug
DE102010026757B4 (de) Verfahren und Produktionslinie zum Herstellen eines kaltgewalzten Stahlflachprodukts aus einem nicht rostenden Stahl
DE112013000850T5 (de) Oberflächenbearbeitungssystem für ein Blechband in kaltem Zustand und Bearbeitungsverfahren für dasselbe
EP1900449A1 (de) Spritzbalken einer hydraulischen Entzunderungsanlage und Verfahren zum Betreiben eines solchen Spritzbalkens
EP0688878B1 (de) Verfahren zur Nachbehandlung geschweisster Platinen
EP3733317B1 (de) Walzen eines walzguts
DE102008039140A1 (de) Verfahren und Vorrichtung zum Erzeugen eines Magnesiumbands
EP3670011B1 (de) Kühlung von metallband in einem walzgerüst
EP0998993A2 (de) Verfahren und Vorrichtung zum Kühlen von walzwarmem Walzgut, insbesondere Warmbreitband
EP1525060B1 (de) Verfahren und anlage zur kontinuierlichen herstellung metallischer bänder
DE4320638A1 (de) Verfahren und Anlage zum raschen Abkühlen eines in einem Warmwalzwerk verarbeitenden Walzgutes
DE2913664A1 (de) Verfahren zur herstellung von kaltband
DE2641512A1 (de) Verfahren und vorrichtung zum kontinuierlichen erzeugen eines kupferstrangs
DE3710450A1 (de) Verfahren und einrichtung zur abkuehlung von walzgut in wasserkuehlstrecken
DE4430856C2 (de) Verfahren zur Reduzierung und Steuerung der Oberflächenverzunderung beim Warmwalzen von Flachprodukten, insbesondere Warmbändern
EP1802406B2 (de) Verfahren und vorrichtung zum reinigen von walzen
EP4214010A1 (de) Verfahren und sprüheinrichtung zur thermischen oberflächenbehandlung eines metallischen produkts
EP1261751A2 (de) Verfahren und anlage zum feuerbeschichten von metallischen bändern
EP3698895A1 (de) Anlage und verfahren zur texturierung der oberfläche eines metallbandes

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: 19940906

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES FR GB IT NL

17Q First examination report despatched

Effective date: 19950102

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: STAHLWERKE BREMEN GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES FR GB IT NL

REG Reference to a national code

Ref country code: ES

Ref legal event code: BA2A

Ref document number: 2088276

Country of ref document: ES

Kind code of ref document: T3

REF Corresponds to:

Ref document number: 59302830

Country of ref document: DE

Date of ref document: 19960711

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

Effective date: 19960625

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2088276

Country of ref document: ES

Kind code of ref document: T3

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed
ET Fr: translation filed
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: BE

Payment date: 19990219

Year of fee payment: 7

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

Ref country code: ES

Payment date: 19990302

Year of fee payment: 7

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

Ref country code: GB

Payment date: 19990305

Year of fee payment: 7

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

Ref country code: NL

Payment date: 19990331

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: 19990531

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: 20000310

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

Ref country code: ES

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

Effective date: 20000311

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

Ref country code: BE

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

Effective date: 20000331

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

Ref country code: FR

Payment date: 20000331

Year of fee payment: 8

BERE Be: lapsed

Owner name: STAHLWERKE BREMEN G.M.B.H.

Effective date: 20000331

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

Ref country code: NL

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

Effective date: 20001001

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

Effective date: 20000310

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20001001

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: 20010103

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010910

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

Ref country code: FR

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

Effective date: 20011130

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050310