EP1230045B1 - Kaltwalzverfahren - Google Patents

Kaltwalzverfahren Download PDF

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Publication number
EP1230045B1
EP1230045B1 EP00972882A EP00972882A EP1230045B1 EP 1230045 B1 EP1230045 B1 EP 1230045B1 EP 00972882 A EP00972882 A EP 00972882A EP 00972882 A EP00972882 A EP 00972882A EP 1230045 B1 EP1230045 B1 EP 1230045B1
Authority
EP
European Patent Office
Prior art keywords
rolling
stock
gas
inert gas
rolling stock
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
EP00972882A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1230045A1 (de
Inventor
Heinz HÖFINGHOFF
Hans-Toni Junius
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.)
C D Waelzholz GmbH
Original Assignee
Cd Walzholz Produktions-Gesellschaft Mbh
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 Cd Walzholz Produktions-Gesellschaft Mbh filed Critical Cd Walzholz Produktions-Gesellschaft Mbh
Publication of EP1230045A1 publication Critical patent/EP1230045A1/de
Application granted granted Critical
Publication of EP1230045B1 publication Critical patent/EP1230045B1/de
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
    • 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
    • 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
    • B21B1/30—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 non-continuous process
    • B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • 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
    • B21B45/0206—Coolants
    • 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
    • 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
    • B21B2045/0212—Cooling devices, e.g. using gaseous coolants using gaseous coolants
    • 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
    • B21B45/0239—Lubricating
    • B21B45/0242—Lubricants

Definitions

  • the present invention relates to a method for Cold rolling of metallic rolling stock, in which the rolling stock at room temperature for plastic deformation by a Rolling gap between counter-driven rollers fürläft and in the area in the nip Inert gas is blown, which is a lower temperature has, as the rolling stock temperature in the nip.
  • the invention further relates to a cold rolling stand for cold rolling metallic rolling stock by a method of the aforementioned Art.
  • Cold rolling is a long known process for shaping continuously passing strip, profile or sheet from steel or other metals. This is a cold deformation in which - in contrast to the hot forming - the rolling stock is not heated before the actual forming process, ie at the prevailing ambient temperature (room temperature) is subjected to the plastic deformation. This change in shape below the respective recrystallization temperature of the metals brings about advantageous changes in the properties of the deformed materials, for example an increase in strength and hardness.
  • material surfaces with defined roughness values R a can be realized thereby, and indeed both the highest surface qualities with a mean roughness value according to DIN 4768/1 R a ⁇ 0.3 ⁇ m - crack and pore-free (RP) or crack-free and pore-free brightly bright (RPG) - as well as roughened surfaces with R a > 1.5 ⁇ m.
  • the surfaces can be optimally matched to the requirements for subsequent processing steps.
  • all cold-workable metal materials can be processed in this way, ie steel, non-ferrous metals, aluminum and other alloys.
  • cold-rolled steel sheet is ideally suited for immediate further processing with the highest quality requirements, for example in the automotive industry.
  • DE-C-31 50 996 describes a method for cold rolling of metallic rolling of the type mentioned
  • This method is a gas in the nip above and injected below the belt.
  • the known method concerns the rolling or rolling of rolling stock Nachwalzgraden of not more than 2.5%, the flatness of Band to improve. It is described by the Use of the injected gas during rolling without Lubrication also belts with perfect smooth surface and without tarnish. It is in this Scripture talk about that by the injected gas additionally a cooling effect was exerted on the roll surface becomes. However, the injected gas is used in this process not cooled. The cooling effect is thus only insofar available, as z. B. blown at room temperature gas has a lower temperature than the surfaces of the rolls, which due to the deformation of the rolling stock Heat rolling process.
  • the present invention is the Task based, a cold rolling process and a Specify cold rolling mill for carrying out this method, which the aforementioned problems by the use avoids as far as possible conventional cooling lubricants.
  • a sufficient cooling and Lubrication be ensured in the nip, where possible no harmful residues remain on the rolling stock should.
  • the inventive method proposes to solve the aforementioned problems, in the area of the roll gap Inert gas or reactive gas deep-frozen blow and the Inert gas or reactive gas below its To supply liquefaction temperature in liquid form.
  • the roll gap or the rolling stock passing through the nip with locally Inert gas circulates.
  • an inert gas is a non-oxidizing Gas, for example nitrogen, noble gases, Carbon dioxide or other gases and gas mixtures containing the Do not attack rolling stock, that means there is no Cause corrosion.
  • the method according to the invention is based on the surprising finding that effective heat removal from the roll gap, a corrosion-preventing effect and, what is particularly unexpected, a good reduction in friction in the roll gap are effected by a directionally cooled inert gas stream. This means that, according to the invention, gas cooling lubrication during cold rolling is realized for the first time.
  • the inventive method thus shows a first Way, the previously considered mandatory, at Room temperature liquid cooling lubricants such as water, oil or emulsions by gaseous at room temperature Coolant gas to replace.
  • the inert gas is limited to the limit Contact surface in the nip between rolling stock and roller directed blown.
  • the rolling stock is where the maximum thermal load occurs, especially good locally cooled.
  • the lubricating effect of Gas lubrication according to the invention by the directed Insufflation to the edge of the interface also improved.
  • the inert gas in Walzguteintritt and in Walzgutaustritt blown is a particularly good Cooling and safe shielding from harmful Guaranteed atmospheric oxygen. In individual cases, however, it can already sufficient, the inert gas in Walzguteinstritt or in Walzgutaustritt supply.
  • the inert gas is expediently at least on the Fed to the top of the rolling stock. It is exploited that the cold inert gas is heavier than the ambient air and thus alone under the influence of gravity the underside of the rolling stock and the lower roll also flows around.
  • the invention Method provides that the inert gas below its Is blown liquefaction temperature.
  • the inert gas For example, nitrogen, which under normal conditions (Room temperature, atmospheric pressure) is present in gaseous form, it is so far cooled down until it is the liquid state of aggregation occupies.
  • As a liquefied gas it is then according to the inventive method in the region of the roll gap injected or injected.
  • this LPG goes on warming to room temperature completely in the gaseous state of aggregation, leaves behind consequently, no harmful residues on the rolling stock, as if it is blown in gaseous form.
  • the significantly improved cooling effect when using Liquefied gas results from its extremely low temperature and from the fact that it is all its vaporization energy Transition into the gaseous state of aggregation as heat energy withdraws from the environment, resulting in relatively large amounts of heat be removed from the rolling stock within a short time.
  • the Walzgut thus occurs at very low temperature in the Roll gap.
  • the resulting heat of deformation is at Walzgutaustritt by liquefied natural gas cooling practically immediately dissipated.
  • the thermal stress of the Surfaces, both the Walzgut- and the Rolled surfaces are thereby reduced to a minimum.
  • due to the temperature differences is formed Gas cushion on the contact surface in the nip, so that the Roller friction and thus the mechanical stress of Surfaces is also significantly reduced. After all is due to the low surface temperatures Surface corrosion effectively reduced by oxidation, and although even then, if the rolling stock or the Roll surface the directly flowed with inert gas Leave the area around the nip.
  • the process according to the invention is preferred during cold rolling of steel, in particular steel strip and sheet steel carried out, especially at high Surface finishes according to DIN EN 10139.
  • process is not based on the processing of steel limited, but can of course also at Cold rolling of other cold-workable metal materials be used, for example, non-ferrous metals, aluminum and other metals and alloys.
  • the inventive method can be relatively low design effort on a cold rolling stand for cold rolling of metallic rolling, which is at least two Rollers (work rolls) which can be driven in opposite directions are stored in a roll stand and between them the nip is through which the rolling stock Change in shape passes. According to the invention this has with cold inert gas acted upon nozzles on the Roll nip are directed.
  • the nozzles are at Walzguteintritt and on Walzgutaustritt mounted. At least they should be on the Be arranged top of the rolling stock. This arrangement is often sufficient, since the cold inert gas alone due Gravity will wash around the underside of the rolling stock. Optionally, however, on the underside of the rolling stock also be mounted nozzles.
  • the nozzles with be acted upon cryogenic gas or liquefied gas.
  • the present invention provides that instead of Inert gas, which is related to the material surfaces behaves passively, a reactive gas is used, which with the surface of the rolling stock to achieve defined Surface properties can undergo chemical reactions.
  • a reactive gas is used, which with the surface of the rolling stock to achieve defined Surface properties can undergo chemical reactions.
  • this reactive gas are also the problems underlying the invention by the use liquid cooling lubricants avoided. This can be done namely also a sufficient cooling and lubrication in Achieve rolling gap, and, as with the inert gas, no harmful residues remain on the rolling stock.
  • Reactive gases are all gases or gas mixtures in question, which under suitable conditions, for example in certain temperature ranges with the respective material of the rolling stock can react in a predeterminable manner. It is conceivable, for example, the use of carbon dioxide and other inorganic or organic gases or Gas mixtures.
  • Fig. 1 shows in a perspective view obliquely from above schematically a cold rolling mill according to the invention, wherein the better clarity the roll stand omitted are.
  • This cold rolling mill which as a whole with the Reference numeral 1 is provided, has two perpendicular superposed rollers 2, between which the nip 3 is located.
  • the rolling stock is represented by a metal band or Sheet 4, for example made of steel, formed in Arrow direction passes through the nip 3.
  • the reference numeral 5 denotes nozzles which are on the Bandeintritts- and the tape exit side of the roll stand. 2 are arranged and with their gas outlet obliquely from above in the area of the roll gap 3 are directed.
  • the rollers 2 In driven manner known to rotate, whereby the rolling stock. 4 under shape change passes through the nip 3.
  • the Nozzles 5 are subjected to inert gas according to the invention, and Although preferred with cold or cryogenic gas or Liquefied gas, for example nitrogen. This will be a effective local cooling of the rolling stock 4 in the region of Roll gap 3. Due to the local protective atmosphere in the area of the nip 3, oxidation is reliably suppressed.
  • the Inert gas immediately ensures adequate lubrication between the roll and Walzgutoberfest so that no additional coolants and lubricants are required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Lubricants (AREA)
  • Heat Treatment Of Steel (AREA)
  • Laminated Bodies (AREA)
EP00972882A 1999-11-04 2000-10-31 Kaltwalzverfahren Expired - Lifetime EP1230045B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19953230A DE19953230C2 (de) 1999-11-04 1999-11-04 Kaltwalzverfahren
DE19953230 1999-11-04
PCT/EP2000/010711 WO2001032326A1 (de) 1999-11-04 2000-10-31 Kaltwalzverfahren

Publications (2)

Publication Number Publication Date
EP1230045A1 EP1230045A1 (de) 2002-08-14
EP1230045B1 true EP1230045B1 (de) 2004-01-14

Family

ID=7927992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00972882A Expired - Lifetime EP1230045B1 (de) 1999-11-04 2000-10-31 Kaltwalzverfahren

Country Status (10)

Country Link
US (1) US6874344B1 (es)
EP (1) EP1230045B1 (es)
AT (1) ATE257749T1 (es)
AU (1) AU1145401A (es)
BR (1) BR0015467B1 (es)
CA (1) CA2390171C (es)
DE (2) DE19953230C2 (es)
ES (1) ES2214330T3 (es)
MX (1) MXPA02004110A (es)
WO (1) WO2001032326A1 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005120739A1 (de) * 2004-06-09 2005-12-22 Sms Demag Ag Verfahren und walzgerüst zum kaltwalzen von metallischen walzgut, insbesondere von walzband, mit düsen für gasförmige oder flüssige behandlungsmedien
DE102011109534A1 (de) * 2011-08-05 2013-02-07 Air Liquide Deutschland Gmbh Verfahren und Vorrichtung zur Kühlung von kontinuierlich durchlaufendem Material

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US6675622B2 (en) * 2001-05-01 2004-01-13 Air Products And Chemicals, Inc. Process and roll stand for cold rolling of a metal strip
US20030145694A1 (en) * 2002-02-04 2003-08-07 Zbigniew Zurecki Apparatus and method for machining of hard metals with reduced detrimental white layer effect
US7513121B2 (en) 2004-03-25 2009-04-07 Air Products And Chemicals, Inc. Apparatus and method for improving work surface during forming and shaping of materials
US7634957B2 (en) 2004-09-16 2009-12-22 Air Products And Chemicals, Inc. Method and apparatus for machining workpieces having interruptions
DE102005001806A1 (de) * 2005-01-13 2006-07-20 Air Liquide Deutschland Gmbh Verfahren zum Kaltwalzen von metallischem Walzgut
DE102005042020A1 (de) 2005-09-02 2007-03-08 Sms Demag Ag Verfahren zum Schmieren und Kühlen von Walzen und Metallband beim Walzen, insbesondere beim Kaltwalzen, von Metallbändern
US7434439B2 (en) * 2005-10-14 2008-10-14 Air Products And Chemicals, Inc. Cryofluid assisted forming method
US7390240B2 (en) * 2005-10-14 2008-06-24 Air Products And Chemicals, Inc. Method of shaping and forming work materials
DE102006019544A1 (de) * 2005-12-01 2007-06-06 Sms Demag Ag Verfahren und Vorrichtung zur Entzunderung von Dünnbrammen und Bändern in Warmbandstraßen, Bandbehandlungsanlagen oder dergleichen
JP4986499B2 (ja) * 2006-04-26 2012-07-25 Ｊｘ日鉱日石金属株式会社 Ｃｕ−Ｎｉ−Ｓｉ合金すずめっき条の製造方法
KR101186761B1 (ko) 2006-08-28 2012-10-08 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 극저온 액체 분사용 분사 장치 및 이 장치와 관련된 분사 방법
JP5265126B2 (ja) 2007-03-27 2013-08-14 Ｊｘ日鉱日石エネルギー株式会社 圧延方法
DE102007032067A1 (de) * 2007-07-10 2009-01-15 Linde Ag Vorrichtung und Verfahren zur CO2 Reinigung beim Schweißen von Metallen
BRPI0815930A2 (pt) * 2007-08-28 2015-09-29 Air Prod & Chem método, e aparelho para uso com um processo de laminação a frio
EP2200762B1 (en) * 2007-08-28 2014-08-06 Air Products and Chemicals, Inc. Method and apparatus for discharging a non-linear cryogen spray across the width of a mill stand
BRPI0815928A2 (pt) * 2007-08-28 2017-05-16 Air Prod & Chem equipamento para uso com um sistema que possui um componente de resfriamento criogênico, método utilizado com um sistema que possui um componente de resfriamento criogênico
BRPI0815929A2 (pt) * 2007-08-28 2017-05-16 Air Prod & Chem equipamento, método para prevenir a formação de congelamento em um dispositivo criogênicos, e método de operar um dispositivo criogênico
WO2009032709A1 (en) 2007-08-28 2009-03-12 Air Products And Chemicals, Inc. Apparatus and method for controlling the temperature of a cryogen
US8893519B2 (en) * 2008-12-08 2014-11-25 The Hong Kong University Of Science And Technology Providing cooling in a machining process using a plurality of activated coolant streams
GB2466458B (en) 2008-12-19 2011-02-16 Siemens Vai Metals Tech Ltd Rolling mill temperature control
US9303316B1 (en) * 2010-01-15 2016-04-05 Apollo Precision Kunming Yuanhong Limited Continuous web apparatus and method using an air to vacuum seal and accumulator
CN103433310B (zh) * 2013-09-18 2015-07-15 河南理工大学 一种热轧金属的除鳞方法
CN103481201A (zh) * 2013-10-16 2014-01-01 山西太钢不锈钢股份有限公司 金属板带表面连续除鳞的装置与方法
GB2532924A (en) * 2014-11-26 2016-06-08 Primetals Technologies Austria GmbH Seal
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
EP3383561B1 (en) * 2015-12-04 2024-01-24 Arconic Technologies LLC Methods of cooling an electrically conductive sheet during transverse flux induction heat treatment
EP3282023A1 (de) * 2016-08-11 2018-02-14 Linde Aktiengesellschaft Kühlvorrichtung und verfahren zum kühlen durchlaufender elemente
DE102017007801A1 (de) * 2017-08-17 2019-02-21 Linde Aktiengesellschaft Verfahren und Vorrichtung zum Verfestigungsstrahlen oder Verfestigungswalzen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005120739A1 (de) * 2004-06-09 2005-12-22 Sms Demag Ag Verfahren und walzgerüst zum kaltwalzen von metallischen walzgut, insbesondere von walzband, mit düsen für gasförmige oder flüssige behandlungsmedien
DE102011109534A1 (de) * 2011-08-05 2013-02-07 Air Liquide Deutschland Gmbh Verfahren und Vorrichtung zur Kühlung von kontinuierlich durchlaufendem Material

Also Published As

Publication number Publication date
BR0015467B1 (pt) 2008-11-18
US6874344B1 (en) 2005-04-05
EP1230045A1 (de) 2002-08-14
DE50005041D1 (de) 2004-02-19
WO2001032326A1 (de) 2001-05-10
DE19953230A1 (de) 2001-05-23
CA2390171A1 (en) 2001-05-10
ATE257749T1 (de) 2004-01-15
CA2390171C (en) 2008-01-15
AU1145401A (en) 2001-05-14
BR0015467A (pt) 2002-06-25
MXPA02004110A (es) 2003-08-20
DE19953230C2 (de) 2003-08-28
ES2214330T3 (es) 2004-09-16

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