EP1861517A1 - Reduction controlee d'epaisseur pour un feuillard d'acier lamine a chaud et revetu par immersion a chaud et installation correspondante - Google Patents

Reduction controlee d'epaisseur pour un feuillard d'acier lamine a chaud et revetu par immersion a chaud et installation correspondante

Info

Publication number
EP1861517A1
EP1861517A1 EP06723308A EP06723308A EP1861517A1 EP 1861517 A1 EP1861517 A1 EP 1861517A1 EP 06723308 A EP06723308 A EP 06723308A EP 06723308 A EP06723308 A EP 06723308A EP 1861517 A1 EP1861517 A1 EP 1861517A1
Authority
EP
European Patent Office
Prior art keywords
thickness
hot
steel strip
station
reduction
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
EP06723308A
Other languages
German (de)
English (en)
Other versions
EP1861517B1 (fr
Inventor
Hans-Georg KLÖCKNER
Andreas Gramer
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 En Wuppermann Staal Nederland Bv
Original Assignee
SMS Demag AG
Wuppermann Staal Nederland BV
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
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Application filed by SMS Demag AG, Wuppermann Staal Nederland BV filed Critical SMS Demag AG
Priority to PL06723308T priority Critical patent/PL1861517T3/pl
Publication of EP1861517A1 publication Critical patent/EP1861517A1/fr
Application granted granted Critical
Publication of EP1861517B1 publication Critical patent/EP1861517B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing

Definitions

  • a cold-rolled strip is recrystallized annealed, then hot-dip coated and then dressed and / or stretch-bending.
  • a hot strip which was previously dip coated, is reduced to dimensional stability on a separate cold rolling mill.
  • a hot strip is hot dip coated after the removal of the Zundems and trained and / or stretch bending.
  • 6,761,936 B1 WO 01/011099
  • A2 a method for hot-dip galvanizing hot-rolled steel sheet is already known, wherein in a first step the strip is introduced into a pickling station, in a further step the strip is inserted into a strip Rinsing station is introduced, then introduced into a drying station, introduced in a further step in a galvanizing furnace and a galvanizing is carried out, wherein the aforementioned method steps are carried out under hermetic seal against air and oxygen from the environment.
  • the object of the present invention is to further process the strip directly in the process line during the production of such hot dip-finished hot strips and to subject it there to a specific thickness reduction.
  • the present invention thus relates to a process for hot dip galvanized steel strip, wherein the steel strip passes through a pickling station, a rinsing station, a drying station, a heating furnace and then a molten bath, characterized in that the finished thickness and the thickness tolerance of the hot dip coated steel strip are controlled Thickness reduction is achieved in a rolling stand in the process line, in which by at least one thickness gauge in the outlet of the rolling mill, the achievement of the finished thickness is controlled and deviations from this up or down as a control signal to the employment of the rolling stand are returned to increase the thickness reduction accordingly or reduce.
  • the hot dip coated strip is subjected to elongation in the line and thus to a reduction in thickness in a skin pass mill, in which the goal of uniform elongation of the strip cross section over the strip length is pursued.
  • the inlet and outlet speeds are measured and evaluated as a measure of a uniform extension or thickness reduction for control purposes.
  • the technological emphasis in the method according to the invention in the targeted and controlled setting of the finished thickness and the tolerance in the roll stand in the line after hot dipping.
  • tempering lies in the fact that e.g. as the run-in thickness increases, the reduction in thickness in the rolling mill increases to maintain the finished thickness, thereby increasing the run-out speed (at a constant run-in speed).
  • thinner inlet thickness e.g. as the run-in thickness increases, the reduction in thickness in the rolling mill increases to maintain the finished thickness, thereby increasing the run-out speed (at a constant run-in speed).
  • thinner inlet thickness e.g. as the run-in thickness increases, the reduction in thickness in the rolling mill increases to maintain the finished thickness, thereby increasing the run-out speed (at a constant run-in speed).
  • thinner inlet thickness at a constant run-in speed
  • the aforementioned thickness gauge is sold, for example, by the Thermo Electron (Er GmbH in Erlangen under the name Radiometrie RM 200 EM together with the corresponding software and hardware. These gauges are preferably used in line directly behind, and in particular also in front of, the hot rolling mill to control the rolling force for the thick reduced hot dipped hot rolled strip.
  • a thickness gauge is arranged in front of the roll stand, which measures the input thickness of the steel strip and reports the thickness control of the roll stand.
  • the thickness reduction is in a range of more than 2% to 30%, preferably 4% to 10%. With such thickness reductions, the thickness tolerance relative to the center of the band is +/- 0.01 mm, or better. According to a preferred embodiment of the present invention, the thickness reduction takes place after cooling of the steel strip to 25 0 C - 55 0 C, in particular 30 0 C - 50 0 C.
  • a steel strip in the sense of the present invention is understood to mean e.g. hot rolled mild steels for cold forming, as used in DIN EN 10 111 under the designations DD11 - DD14, as well as hot rolled unalloyed structural steels, as described in DIN EN 10025.
  • strip accumulators are provided before and / or after the roll stand in order to absorb speed fluctuations through the thickness control.
  • These are, in particular, mini-band memories, in which the corresponding speed fluctuations can be absorbed particularly well.
  • At least one of the work rolls in the roll stand is smooth or has a structured surface with a special cut and / or stochastic / deterministic structure.
  • both a cylindrical grinding, as well as a spherical grinding can be used.
  • stochastic structures For the production of rough surfaces on the steel strip on the one hand stochastic structures can be used, which by the methods Shot Blast Texturing (SBT), Electro Discharge Texturing (EDT), Electro Chemical Texturing (ECT) and Precision Texturing (PRETEX® process from Salzgitter AG) Furthermore, laser texturing (LT) and electron beam texturing (EBT) can be used to generate deterministic crater-like structures on such work rolls.
  • SBT Shot Blast Texturing
  • EDT Electro Discharge Texturing
  • ECT Electro Chemical Texturing
  • PRETEX® process Precision Texturing
  • LT laser texturing
  • EBT electron beam texturing
  • the thickness reduction takes place in the presence of a rolling fluid.
  • a rolling fluid is either a volatilizing metalworking agent, demineralized water, Synthetic rolling oil, but also to a rolling emulsion, which improve the friction properties in the nip (friction conditions between rolling and rolling).
  • Such lubrications are usually carried out by a quantity order of about 0.2 g / m 2 - 5 g / m 2 .
  • the hot-dip coating is a coating with a zinc or aluminum alloy.
  • a zinc or aluminum alloy Exemplified are zinc, zinc-iron, zinc-aluminum, aluminum-zinc or aluminum-silicon, with zinc and zinc alloys being preferred.
  • the pickling station, rinsing station, drying station and the molten bath pass through under shielding against air and oxygen.
  • the object of the present invention is further to provide a plant for producing a special hot-dip coated hot-rolled steel strip.
  • the present invention therefore relates to a plant for the production of hot-dip coated hot-rolled steel strip of the type described, comprising a pickling station, a rinsing station, a dryer, a heating furnace and a molten bath, characterized in that in the process line a rolling stand with at least one thickness gauge in the outlet is provided for a controlled reduction in thickness, preferably to provide a thickness reduction of more than 2% to 30%, in particular 4% to 10%, optionally in conjunction with an embossing with special grinding and / or stochastic / deterministic structure of the steel strip.
  • a hot-rolled soft steel for cold forming under the designation band EN 10111 -DD 11 was subjected to a controlled thickness reduction of about 6.5% following a hot-dip coating of the abovementioned type according to the invention.
  • the soft product EN 10111-DD11 is used to produce a galvanized grade steel such as DX51D of EN 10327 or S320GD of EN 10326 with the same material characteristics as a galvanized steel strip of the same designation in accordance with the EN standard. During the controlled reduction in thickness, the calipers were recorded over the tape length of hot strip coils.
  • Example 1 was repeated, but instead of a controlled reduction in thickness, a 1% treatment was carried out. As in Example 1, the thicknesses were recorded over the tape length of hot strip coils.
  • a comparison of the characteristics shows that the thickness letters over the strip length of hot strip coils in the trained state on the one hand (prior art) and in the inventive method on the other hand significantly different from each other and the process product according to the invention at almost 6.5 times higher thickness reduction, a hot strip coil with much lower Thickness tolerances is generated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
EP06723308A 2005-03-18 2006-03-09 Reduction controlee d'epaisseur pour un feuillard d'acier lamine a chaud et revetu par immersion a chaud et installation correspondante Active EP1861517B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06723308T PL1861517T3 (pl) 2005-03-18 2006-03-09 Kontrolowana redukcja grubości powlekanej zanurzeniowo taśmy stalowej walcowanej na gorąco i stosowane przy tym urządzenie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005013103A DE102005013103A1 (de) 2005-03-18 2005-03-18 Kontrollierte Dickenreduktion bei schmelztauchbeschichtetem warmgewalztem Stahlband und hierbei eingesetzte Anlage
PCT/EP2006/002155 WO2006097237A1 (fr) 2005-03-18 2006-03-09 Reduction controlee d'epaisseur pour un feuillard d'acier lamine a chaud et revetu par immersion a chaud et installation correspondante

Publications (2)

Publication Number Publication Date
EP1861517A1 true EP1861517A1 (fr) 2007-12-05
EP1861517B1 EP1861517B1 (fr) 2008-12-31

Family

ID=36581615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06723308A Active EP1861517B1 (fr) 2005-03-18 2006-03-09 Reduction controlee d'epaisseur pour un feuillard d'acier lamine a chaud et revetu par immersion a chaud et installation correspondante

Country Status (9)

Country Link
US (2) US8163348B2 (fr)
EP (1) EP1861517B1 (fr)
JP (1) JP4866897B2 (fr)
CN (1) CN101107378B (fr)
AT (1) ATE419408T1 (fr)
DE (2) DE102005013103A1 (fr)
PL (1) PL1861517T3 (fr)
RU (1) RU2409698C2 (fr)
WO (1) WO2006097237A1 (fr)

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CN106521390B (zh) * 2016-10-28 2018-09-11 鞍钢未来钢铁研究院有限公司 一种基于数据库的带钢连续热镀锌镀层厚度控制方法
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CN111957750B (zh) * 2020-07-08 2022-03-04 北京科技大学设计研究院有限公司 一种利用质量分析工具进行轧机入口厚度优化的方法
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CN112760470A (zh) * 2021-01-14 2021-05-07 首钢京唐钢铁联合有限责任公司 一种消除带钢冷轧边裂的方法

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Also Published As

Publication number Publication date
US20120213932A1 (en) 2012-08-23
EP1861517B1 (fr) 2008-12-31
US8703242B2 (en) 2014-04-22
DE502006002498D1 (de) 2009-02-12
RU2409698C2 (ru) 2011-01-20
US20080193655A1 (en) 2008-08-14
CN101107378B (zh) 2010-05-19
DE102005013103A1 (de) 2006-09-28
CN101107378A (zh) 2008-01-16
JP2008533300A (ja) 2008-08-21
JP4866897B2 (ja) 2012-02-01
PL1861517T3 (pl) 2009-06-30
RU2007121258A (ru) 2008-12-20
WO2006097237A1 (fr) 2006-09-21
US8163348B2 (en) 2012-04-24
ATE419408T1 (de) 2009-01-15

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