EP0710732B1 - Verfahren zur Heisstauch-Beschichtung ohne Legieren einer Stahlplatte mit einem geringen Gehalt an Zwischengitteratomen - Google Patents

Verfahren zur Heisstauch-Beschichtung ohne Legieren einer Stahlplatte mit einem geringen Gehalt an Zwischengitteratomen Download PDF

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Publication number
EP0710732B1
EP0710732B1 EP95402327A EP95402327A EP0710732B1 EP 0710732 B1 EP0710732 B1 EP 0710732B1 EP 95402327 A EP95402327 A EP 95402327A EP 95402327 A EP95402327 A EP 95402327A EP 0710732 B1 EP0710732 B1 EP 0710732B1
Authority
EP
European Patent Office
Prior art keywords
sheet
hot
alloy
zinc
steel
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
EP95402327A
Other languages
English (en)
French (fr)
Other versions
EP0710732A1 (de
Inventor
Armelle Jouet
Louis Guillot
Vincent Cholet
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0710732A1 publication Critical patent/EP0710732A1/de
Application granted granted Critical
Publication of EP0710732B1 publication Critical patent/EP0710732B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • 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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29—Cooling or quenching

Definitions

  • the invention relates to a coating method, by soaking and without alloy, of a sheet of steel with low interstitial by a metallic layer to aluminum or zinc base and the use of this coated sheet for prepare said strip for enameling or painting.
  • IF Interstitial Free
  • these steel shades contain proportions sufficiently low interstitial elements, in particular carbon and nitrogen, which avoids any risk of supersaturation of these elements in steel.
  • IF steel sheets are widespread, in particular because that these sheets do not present a risk of metallurgical aging.
  • Metallurgical aging is particularly troublesome in the case of sheets coated by dipping, in particular intended for enamelling or for painting.
  • a treatment is generally also carried out thermal alloy after quenching at a sufficiently high temperature to trigger the alliance, said temperature often being higher than the coating melting temperature.
  • the annealing treatment and alloying treatment help to eliminate carbon and nitrogen oversaturations in steel, and therefore to be freed problems inherent in metallurgical aging.
  • the invention relates to IF steel sheets for which such metallurgical aging treatment is, of course, never considered after a dip coating without alloying.
  • the invention relates to coatings based on zinc or aluminum on these IF steel sheets.
  • the layer of enamel deposited on said sheet coated may have a matt, satin or shiny character.
  • the invention aims to improve the surface appearance of an IF sheet coated by dipping, in particular with a metallic base layer aluminum or zinc, after enameling or after painting or after simple aging.
  • the subject of the invention is a coating process, by quenching and without alloy, of a sheet of steel with low interstitial by a metallic layer to aluminum or zinc base according to which said sheet is prepared for the coating, soaking said sheet in a bath of molten metal, extracting bath said sheet and solidifies the metallic layer entrained on the surface of said sheet, in particular by rapid cooling, characterized in that that, immediately after solidification of said metal layer, subjects said sheet to a rapid heat treatment of a shorter duration 5 minutes including a rapid heating step and a rapid cooling to room temperature, said rapid heating being adapted to bring the surface of said sheet to a temperature higher than 300 ° C but lower than the alloying temperature between said sheet metal and said metal layer.
  • the invention also relates to the use of such a coated sheet by dipping, in particular with a layer of aluminum or aluminum alloy, for an enamel coating, in particular an enamel having a surface brilliant.
  • the invention also relates to the use of such a coated sheet by dipping, in particular with a layer of zinc, for a coating of paint, especially paint that requires cooking at a temperature above 100 ° C.
  • the installation of continuous coating by dipping a strip metal comprises means for preparing the strip, means soaking the strip in a molten metal bath, means for solidification and dewatering of metallic layer and means of rapid heat treatment arranged in cascade along a path continuous scrolling of said strip.
  • the means for preparing the strip, the means for soaking the strip in a bath of molten metal and the solidification means and of metallic layer are known in themselves for the dip coating of metal strips.
  • the means for preparing the strip include in particular means for preparing the surface of the strip and means for recrystallization of the steel from the strip.
  • the means for surface preparation of the strip comprise a burning chamber with open flame burners oriented towards said tape scroll path.
  • the recrystallization means comprise a thermal enclosure whose atmosphere is confined and controllable.
  • the dipping means comprise a crucible for dipping the strip to contain a bath of molten metal.
  • the solidification and wringing means include ramps of gas blowing at room temperature oriented towards the tape scrolling.
  • the heat treatment means include means for heating and cooling means.
  • the heating means are in the form of a tunnel equipped with infrared radiation ramps oriented towards the path tape scrolling.
  • heating means can be used without losing of the present invention, in particular means of heating by induction.
  • the cooling means include ejection ramps gas or liquid oriented toward the tape running path.
  • the duration of the rapid heat treatment is less than 2 minutes.
  • the radiation power of the infrared ramps of the tunnel heating and the length of said tunnel are adapted in a known manner in itself so that the temperature of the surface of the strip is brought up at a temperature above 300 ° C but below the temperature of alloy between said sheet and said metal layer.
  • said strip surface temperature is preferably between 550 ° C and 625 ° C.
  • said surface temperature of the strip is preferably between 320 ° C and 390 ° C.
  • said strip surface temperature is preferably between 390 ° C and 550 ° C.
  • the gas flow rate of the ejection ramps of the cooling means and the number of ramps along the tape running path are adapted in a manner known per se to cool the surface of the tape at room temperature.
  • the Applicant has also found that surface defects no longer appear after aging of an IF steel sheet, thus coated by dipping, in particular zinc or a zinc-based alloy.
  • the purpose of this test is to illustrate the method according to the invention of dip coating of an IF steel strip with a layer of alloy aluminum.
  • the aluminum alloy to be deposited contains, by weight, 90% aluminum and 10% silicon and melts at a temperature of about 680 ° C.
  • the length of the tunnel of heating means for treatment thermal according to the invention is about 80 m.
  • the aluminum alloy coating thus obtained has good adhesion to the steel substrate and a homogeneous surface appearance.
  • the purpose of this test is to illustrate the improvement of the surface condition of a coated sheet according to the invention then enamelled to obtain a surface brilliant.
  • An IF steel strip coated under the same conditions is prepared than in test no. 1, with the difference that the coated strip is cooled to room temperature immediately after spinning and solidification of the coating layer, without passing through the rapid heating tunnel and a sheet blank A is cut from the strip obtained.
  • a sheet blank B is cut from the coated strip from test # 1.
  • the enamel used can have the following composition: Si02: 27% - TiO2:: 25% - Na2O:: 17% - K2O: 11% - V2O5: 8% - CdO: 5% - B2O3: 3% - P2O5: 2% - Li2O: 1% - Al2O3: 1%.
  • a sheet of steel, coated by dipping in accordance with the invention, in particular a layer of aluminum or a base alloy aluminum, then enamelled to obtain a shiny surface, does not have almost more surface defects.
  • the zinc coating thus obtained has good adhesion to steel substrate.
  • An IF steel strip coated under the same conditions is prepared than in test no. 3 with the difference that the coated strip is cooled to room temperature immediately after spinning and solidification of the coating layer, without passing through the rapid heating tunnel and a sheet blank C is cut from the strip obtained.
  • a sheet metal blank D is cut from the coated strip from test # 3.
  • the painted surface of the sheet blank D has a very good appearance and has almost no defects, whereas that of the blank C is very disturbed and has many micro-blisters or micro-blisters.
  • a sheet of steel, coated by dipping in accordance with the invention, in particular a layer of zinc, then painted, does not present almost more surface defects.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (9)

  1. Verfahren zur Heißtauchbeschichtung ohne Legieren eines Stahlbleches mit einem geringen Gehalt an Zwischengitteratomen mit einem Metallüberzug auf Aluminium- oder Zinkbasis, bei dem man das Blech für die Beschichtung vorbereitet, man das Blech in ein Bad aus geschmolzenem Metall taucht, man das Blech aus dem Bad herauszieht und man den an der Oberfläche des Bleches mitgeführten Metallüberzug insbesondere durch schnelle Abkühlung zum Erstarren bringt, dadurch gekennzeichnet, daß man unmittelbar nach Erstarren des Metallüberzugs das Blech einer schnellen Wärmebehandlung von weniger als 5 Minuten Dauer unterzieht, die einen Schritt der schnellen Erhitzung und einen Schritt der schnellen Abkühlung auf die Umgebungstemperatur umfaßt, wobei die schnelle Erhitzung derart erfolgt, daß die Oberfläche des Bleches auf eine Temperatur gebracht wird, die höher als 300°C, jedoch niedriger als die Temperatur des Legierens zwischen dem Blech und dem Metallüberzug ist.
  2. Verfahren zur Heißtauchbeschichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Dauer der schnellen Wärmebehandlung vorzugsweise weniger als etwa 2 Minuten beträgt.
  3. Verfahren zur Heißtauchbeschichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Metallüberzug auf Aluminiumbasis ist und daß die Temperatur der Wärmebehandlung zwischen 550°C und 625°C beträgt.
  4. Verfahren zur Heißtauchbeschichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Metallüberzug auf Zinkbasis ist und daß die Temperatur der Wärmebehandlung zwischen 320°C und 390°C beträgt.
  5. Verfahren zur Heißtauchbeschichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Metallüberzug eine Legierung aus Zink und Aluminium ist und daß die Temperatur der Wärmebehandlung zwischen 390°C und 550°C beträgt.
  6. Verfahren zur Heißtauchbeschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es kontinuierlich durchgeführt wird.
  7. Verfahren zur Heißtauchbeschichtung eines Stahlbleches nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Vorbereitung des Bleches auf die Beschichtung dieses einer Rekristallisationsbehandlung in einer nichtoxidierenden Atmosphäre unterzogen wird.
  8. Verwendung eines nach einem der Ansprüche 1, 2, 3, 6 und 7 heißtauchbeschichteten Bleches, das insbesondere mit einem Überzug aus Aluminium oder einer Aluminiumlegierung beschichtet wurde, für einen Emailüberzug, insbesondere mit einem Email, das eine hochglänzende Oberfläche aufweist.
  9. Verwendung eines nach einem der Ansprüche 1, 2, 4 bis 7 insbesondere mit einem Überzug aus Zink oder einer Zinklegierung heißtauchbeschichteten Bleches für einen Farbüberzug, insbesondere mit einer Anstrichfarbe, die ein Einbrennen bei einer Temperatur von über 100°C erfordert.
EP95402327A 1994-11-04 1995-10-19 Verfahren zur Heisstauch-Beschichtung ohne Legieren einer Stahlplatte mit einem geringen Gehalt an Zwischengitteratomen Expired - Lifetime EP0710732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9413165 1994-11-04
FR9413165A FR2726578B1 (fr) 1994-11-04 1994-11-04 Procede de revetement au trempe d'une tole d'acier par une couche metallique a base d'aluminium ou de zinc

Publications (2)

Publication Number Publication Date
EP0710732A1 EP0710732A1 (de) 1996-05-08
EP0710732B1 true EP0710732B1 (de) 1998-01-07

Family

ID=9468485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402327A Expired - Lifetime EP0710732B1 (de) 1994-11-04 1995-10-19 Verfahren zur Heisstauch-Beschichtung ohne Legieren einer Stahlplatte mit einem geringen Gehalt an Zwischengitteratomen

Country Status (5)

Country Link
EP (1) EP0710732B1 (de)
AT (1) ATE161898T1 (de)
DE (1) DE69501386T2 (de)
ES (1) ES2111380T3 (de)
FR (1) FR2726578B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007134400A1 (en) * 2006-05-24 2007-11-29 Bluescope Steel Limited Treating al/zn-based alloy coated products

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646362C2 (de) 1996-11-09 2000-07-06 Thyssen Stahl Ag Verfahren zum Wärmebehandeln von ZnAl-schmelztauchbeschichtetem Feinblech
EP0916624B1 (de) * 1997-11-11 2001-07-25 Kawasaki Steel Corporation Porzellan-emailliertes Stahlblech und Fritten zur Emaillierung
FR2775297B1 (fr) * 1998-02-25 2000-04-28 Lorraine Laminage Tole dotee d'un revetement d'aluminium resistant a la fissuration
DE102007022453B4 (de) * 2007-05-10 2020-02-06 Thyssenkrupp Steel Europe Ag Mehrschichtiges Verbundteil und aus diesem hergestelltes Bauteil
NZ597077A (en) 2009-05-28 2014-04-30 Bluescope Steel Ltd Metal-coated steel strip

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297499A (en) * 1964-04-02 1967-01-10 Nat Steel Corp Method for heat treating steel strip
JPS608289B2 (ja) * 1978-10-16 1985-03-01 日新製鋼株式会社 加工性のすぐれた溶融めつき鋼板の製造方法
JPS6048570B2 (ja) * 1978-12-25 1985-10-28 日新製鋼株式会社 連続溶融アルミニウムメツキ鋼板の連続過時効処理法
BE874599A (fr) * 1979-03-02 1979-09-03 Centre Rech Metallurgique Procede de fabrication d'une bande d'acier revetue
JPS61223174A (ja) * 1985-03-28 1986-10-03 Sumitomo Metal Ind Ltd 合金化溶融亜鉛めつき鋼板の製造方法
JPS62130268A (ja) * 1985-12-02 1987-06-12 Kawasaki Steel Corp 加工用合金化処理溶融亜鉛めつき軟鋼板の製造方法
BE1005288A6 (fr) * 1990-09-27 1993-06-22 Centre Rech Metallurgique Installation de traitement continu d'une bande d'acier galvanisee et procede pour son utilisation.
JPH05247619A (ja) * 1992-03-03 1993-09-24 Nippon Steel Corp 合金化亜鉛めっき鋼板製造用竪型合金化炉

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007134400A1 (en) * 2006-05-24 2007-11-29 Bluescope Steel Limited Treating al/zn-based alloy coated products
EP2021523A1 (de) * 2006-05-24 2009-02-11 Bluescope Steel Limited Behandlung von mit einer legierung auf al/zn-basis beschichteten produkten
EP2021523A4 (de) * 2006-05-24 2011-04-13 Bluescope Steel Ltd Behandlung von mit einer legierung auf al/zn-basis beschichteten produkten
CN101454475B (zh) * 2006-05-24 2011-04-20 蓝野钢铁有限公司 处理Al/Zn基合金涂覆产品的方法及所得到的产品

Also Published As

Publication number Publication date
FR2726578A1 (fr) 1996-05-10
DE69501386D1 (de) 1998-02-12
FR2726578B1 (fr) 1996-11-29
ES2111380T3 (es) 1998-03-01
ATE161898T1 (de) 1998-01-15
EP0710732A1 (de) 1996-05-08
DE69501386T2 (de) 1998-07-23

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