EP0939141B1 - Stahlplatte mit spannungsrissbeständiger Aluminiumbeschichtung - Google Patents

Stahlplatte mit spannungsrissbeständiger Aluminiumbeschichtung Download PDF

Info

Publication number
EP0939141B1
EP0939141B1 EP99400414A EP99400414A EP0939141B1 EP 0939141 B1 EP0939141 B1 EP 0939141B1 EP 99400414 A EP99400414 A EP 99400414A EP 99400414 A EP99400414 A EP 99400414A EP 0939141 B1 EP0939141 B1 EP 0939141B1
Authority
EP
European Patent Office
Prior art keywords
layer
aluminium
outer layer
thickness
sheet
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
EP99400414A
Other languages
English (en)
French (fr)
Other versions
EP0939141A1 (de
Inventor
Didier Mareuse
Thérèse Six
Pierre Jean Krauth
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 EP0939141A1 publication Critical patent/EP0939141A1/de
Application granted granted Critical
Publication of EP0939141B1 publication Critical patent/EP0939141B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12—Aluminium or alloys based thereon
    • 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
    • C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/925—Relative dimension specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12639—Adjacent, identical composition, components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB metal-base component
    • Y10T428/12757—Fe
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/12764—Next to Al-base component

Definitions

  • the invention relates to aluminized sheets.
  • a metallic coating based on aluminum on a sheet is a commonly used means of protecting a steel sheet against corrosion, in particular in the case where the temperature of use of this sheet exceeds about 400 ° C.
  • the thickness of the metal coating in question is generally between 5 and 100 ⁇ m.
  • the slats are in the form of needles, it is therefore difficult to distinguish, in practice, needles and coverslips.
  • the internal layer of alloy having a fragile behavior one seeks generally to limit its thickness.
  • Silicon is the most commonly used alloying inhibitor; to be effective, its weight concentration must generally be greater than 6% in the soaking bath.
  • Certain aluminized sheets can then be subjected to heat treatments, either to modify their properties, or even normal use (example: thermal screens); so it is important not to not significantly increase the thickness of the internal alloy layer.
  • the inner layer can be subdivided into several sublayers comprising still other phases; at the interface between inner layer 1 and steel 2, we can sometimes find an underlay comprising the phases following: a phase called ⁇ (Fe2Al5), a phase called ⁇ (FeAl3), one or several phases based on aluminum nitride; the thickness of this underlay generally does not exceed 1 ⁇ m.
  • This outer layer may also include alloying phases to based on aluminum, silicon and iron, in particular of eutectic composition with low melting point.
  • the ⁇ 5 phase has a hexagonal structure; it is sometimes called ⁇ H or H; the iron content of this phase is generally between 29 and 36% by weight; the silicon content of this phase is generally between 6 and 12% by weight; the balance consists mainly of aluminum.
  • the ⁇ 6 phase has a monoclinic structure; it is sometimes called ⁇ or M; the iron content of this phase is generally between 26 and 29% in weight ; the silicon content of this phase is generally between 13 and 16% by weight; the balance consists mainly of aluminum.
  • Table I summarizes the possible composition and the temperature of fusion of the phases present in the coatings obtained after soaked in an aluminizing bath (the composition and temperature of fusion are specified in this same table).
  • phase inclusions ⁇ 6 have an elongated shape whereas the inclusions of phase ⁇ 5 generally have a globular shape.
  • composition of the coating phases Composition: % by mass HAVE Yes Fe Fusion temperature Bath ⁇ 91 > 6 3 (saturation) 675 ° C (T ° C hardened) eutectic 87 12.2 0.8 ⁇ 577 ° C Dendrites Al ⁇ 98 ⁇ 1.5 ⁇ 0,5 ⁇ 660 ° C Slats Si Majority silicon 1412 ° C ⁇ 6 needles 55 14 31 > 577 ° C Phase ⁇ 5 55 to 62 6 to 12 31 to 36 > 577 ° C
  • the object of the invention is to offer a sheet with a coating based on of aluminum is more resistant to cracking by deformation, i.e. a sheet which is more resistant to corrosion after shaping.
  • nitride at the interface or free nitrogen in the steel blocks or limits the growth of the thickness of the internal layer of alloy.
  • the duration of heat treatment, in the phase where said temperature is higher than 570 ° C, is less than or equal to 15 seconds.
  • the steel grade In a manner known per se, the steel grade, the conditions for applying the coating and the composition of the bath, in particular the content of alloying inhibitor, so that the thickness of the inner layer 1 alloy does not exceed that of the outer layer 3.
  • silicon is introduced as alloying inhibitor in the bath, with a content greater than or equal to 6% in weight; preferably, the silicon content is greater than or equal to 8%.
  • the annealing step can be performed under an atmosphere containing ammonia.
  • the outer layer 3 comprises, in addition to the dendrites based aluminum, other phases 4 in the form of needles or elongated lamellae distributed in the thickness of this layer between the dendrites.
  • This projection p is shown in FIG. 1 in the particular case any strip, the strip referenced 5.
  • the treatment time is less than 15 seconds from so as to limit and / or prevent the increase in layer thickness internal alloy.
  • the heat treatment according to the invention has has the effect of significantly reducing the proportion of needles and strips in this outer layer.
  • the aluminum coating is applied so as to the thickness of said internal alloy layer is less than or equal to 5 ⁇ m and the heat treatment according to the invention is carried out so that the thickness of said internal alloy layer remains less than or equal to 5 ⁇ m.
  • the minimum temperature of the treatment according to the invention corresponds to the melting temperature of the phase of the outer layer corresponding to the Al-Si-Fe eutectic composition.
  • the maximum temperature of the treatment according to the invention corresponds to the melting temperature of the aluminum dendrites of the outer layer.
  • This heat treatment can be carried out in air, even if the coating oxidizes slightly on the surface.
  • the aluminized sheet according to the invention therefore resists corrosion better after shaping, in the sense that the coating better protects the steel.
  • the structure of the coating of the aluminized sheet according to the invention is shown schematically in Figure 2 and shown in Figure 6; the general structure remains the same: on steel 2, an internal layer 7 of alloy and a layer external 8 mainly composed of aluminum.
  • the treatment according to the invention generates a structural rearrangement of the layer external leading to the disappearance and / or partition of the lamellae or needles of this layer.
  • the heat treatment according to the invention would therefore have the technical effect first to rearrange the structure of the outer layer so as to obtain a structure opposing the propagation of cracks.
  • the heat treatment according to the invention must also be adapted for prevent or limit the increase in thickness of the inner layer 7 of alloy, because this layer is particularly fragile.
  • the conditions of the heat treatment according to the invention can therefore be optimized in a manner known per se between these two compromises : sufficient rearrangement of the outer layer and slight increase in the thickness of the internal layer of alloy.
  • the heat treatment according to the invention is of short duration, which is an important advantage compared to long-term annealing treatments and at a lower temperature.
  • This heat treatment can therefore advantageously be carried out in line on conventional dip coating installations.
  • this heat treatment is applied so as to heat the outer layer more than the inner alloy layer.
  • the heat treatment according to the invention can also improve appreciably the surface reflectivity of the sheet, in particular in the field wavelengths between 1.5 and 5 ⁇ m; we get this advantage additional especially when performing heat treatment under non-oxidizing atmosphere.
  • the treatment according to the invention is not limited to a surface gloss treatment; indeed some effective brightening treatments cause significant increase of the thickness of the internal layer of alloy, which is contrary to the invention described here.
  • a steel grade containing a content greater than or equal to 10 -2 % by weight of nitrogen is used. free.
  • AlN aluminum nitrides
  • the aluminized steel sheet according to the invention has the following analysis (element contents expressed in thousandths of% by weight): Composition of the steel of Example 1 Element VS mn P S Yes al Or Cr Cu NOT 10 -3 % 53 300 10 15 6 22 20 20 7 11
  • the other elements are in the state of traces; the titanium content is less than 10 -3 %.
  • a significant part of the nitrogen contained in this steel is said to be "free", the other part being essentially combined with aluminum in the form of aluminum nitride (AIN); the AIN content having been evaluated at approximately 1.4 10 -3 % by weight of “nitrogen” equivalent, it is deduced therefrom that the content of free nitrogen is of the order of 10 -2 % by weight in this steel.
  • AIN aluminum nitride
  • a coating based on both sides of this sheet is applied aluminum with a total thickness of approximately 15 ⁇ m; this coating is applied as previously described by soaking in an aluminum bath containing silicon.
  • the average silicon content in the coating is 7% about.
  • this treatment consists in heating the sheet at the speed of 4 ° C / s up to a temperature of 578 ° C, and, as soon as this temperature is reached, blowing with nitrogen to obtain a speed of cooling between 10 and 15 ° C / s.
  • the schematic device is used in FIG. 4: it is a vertical oven 13 comprising two series of electrical resistors 14; the sample to be treated 15, made of aluminized sheet, is suspended from a support rod 16; to measure the temperature of heat treatment, a thermocouple 17, type K (chromel-alumel) is used, 0.2 mm in diameter and class 1 ( ⁇ T ° C x 0.004, i.e. ⁇ 2.4 ° C at 600 ° C); this thermocouple 17 is welded to the face coated with the aluminized sheet.
  • a thermocouple 17 type K (chromel-alumel) is used, 0.2 mm in diameter and class 1 ( ⁇ T ° C x 0.004, i.e. ⁇ 2.4 ° C at 600 ° C); this thermocouple 17 is welded to the face coated with the aluminized sheet.
  • the coating according to the invention is very resistant better cracking than the coating according to the prior art which has not undergone heat treatment.
  • Example 1 Aluminized sheet Folding type Average number of cracks / mm Average crack width observations Before heat treatment 0T 10 40 ⁇ m Inner layer separation and large cracks. 1T 8 62 ⁇ m 2T 5 7 ⁇ m 3T 2 7 ⁇ m After heat treatment (invention) 0T 5 41 ⁇ m Little or no internal layer detachments 1T 3 55 ⁇ m 2T 0 - 3T 0 -
  • the aluminized steel sheet according to the invention has the following analysis (element contents expressed in thousandths of% by weight): Composition of the steel of Example 2 Element VS mn P S Yes al Or Cr Cu NOT 10 -3 % 3 230 10 13 8 46 16 23 20 12
  • the other elements are in the state of traces.
  • a special feature of this steel also lies in its temperature of winding at the end of hot rolling: ⁇ 620 ° C.
  • This steel is aluminized and then heat treated according to the invention in the same conditions as in Example 1.
  • An aluminized sheet according to the invention is then obtained.
  • Example 2 Aluminized sheet Folding type Average number of cracks / mm Average crack width Before heat treatment 0T 11 31 ⁇ m 1T 8 28 ⁇ m 2T 6 7 ⁇ m 3T 2 3 ⁇ m After heat treatment (invention) 0T 10 17 ⁇ m 1T 3 10 ⁇ m 2T 1 3 ⁇ m 3T ⁇ 1 3 ⁇ m

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Coating With Molten Metal (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Laminated Bodies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (8)

  1. Verfahren zur Herstellung eines Stahlblechs (2), das mit einer metallischen Beschichtung auf Basis Aluminium beschichtet ist, die hauptsächlich in zwei Schichten unterteilt ist:
    eine Innenschicht (7), die im wesentlichen aus einer oder mehreren Legierungen auf Basis Eisen, Aluminium und/oder Silizium besteht,
    eine Aussenschicht (8), die im wesentlichen aus einer Phase auf Basis Aluminium und zusätzlichen anderen Phasen in Form von Nadeln oder langgestreckten Lamellen besteht, die in der Phase auf Basis Aluminium verteilt sind und deren Dicke grösser oder gleich derjenigen der inneren Legierungsschicht ist,
    wobei die metallische Beschichtung auf Basis Aluminium durch Eintauchen in ein flüssiges Bad auf Basis Aluminium aufgebracht wird,
    dadurch gekennzeichnet, dass nach der Erstarrung der aufgebrachten Schicht das Blech einer thermischen Behandlung unterzogen wird, die derart ausgelegt ist, dass wenigstens die Aussenschicht (8) auf eine Temperatur gebracht wird, die höher als 570° C und niedriger als 660° C ist, bei der ein Schmelzen der eutektischen Phasen der Aussenschicht gewährleistet ist, unter Bedingungen, insbesondere der Aufheiz- und Abkühlgeschwindigkeiten, die derart gewählt sind, dass:
    die Dicke der Aussenschicht (8) kleiner oder gleich derjenigen der inneren Legierungsschicht (7) ist,
    und dass die Projektion der Länge einer jeden Nadel oder Lamelle (9) in eine Richtung senkrecht zur Ebene der Aussenschicht (8) in jedem Fall kleiner ist als die Dicke dieser Schicht (8),
    und wobei zur erheblichen Verringerung des Anteils an Nadeln und Lamellen in der Aussenschicht die Dauer der thermischen Behandlung während des Zeitraums, in dem die Temperatur oberhalb 570° C liegt, weniger als oder gleich 15 Sekunden beträgt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Bad auf Basis Aluminium wenigstens 6 Gew.% Silizium enthält.
  3. Verfahren nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass das Bad auf Basis Aluminium wenigstens 8 Gew.% Silizium enthält.
  4. Stahlblech, das mit einer metallischen Beschichtung auf Basis Aluminium beschichtet ist, die hauptsächlich in zwei Schichten unterteilt ist:
    eine Innenschicht (7), die im wesentlichen aus einer oder mehreren Legierungen auf Basis Eisen, Aluminium und/oder Silizium besteht
    eine Aussenschicht (8), die im wesentlichen aus einer Phase auf Basis Aluminium und zusätzlichen Phasen in Form von Nadeln und langgestreckten Lamellen (9) besteht, die in der Phase auf Basis Aluminium verteilt sind und deren Dicke grösser oder gleich derjenigen der inneren Legierungsschicht (7) ist,
    das durch ein Verfahren nach einem der vorhergehenden Ansprüche erhalten wurde,
    dadurch gekennzeichnet, dass die Projektion der Länge einer jeden Nadel oder Lamelle (9) in eine Richtung senkrecht zur Ebene der Aussenschicht (8) in jedem Fall kleiner ist als die Dicke der Aussenschicht (8).
  5. Blech nach Anspruch 4, dadurch gekennzeichnet, dass die Dicke der inneren Legierungsschicht (7) kleiner oder gleich 5 µm ist.
  6. Blech nach einem der Ansprüche 4 bis 5, dadurch gekennzeichnet, dass die Beschichtung Verbindungen auf Basis Aluminiumnitrid aufweist, die zwischen dem Stahl (2) des Blechs und der Innenschicht (7) angeordnet sind.
  7. Blech nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass der Gehalt an freiem Stickstoff des Stahles (2) grösser oder gleich ungefähr 10-2 Gew.% ist.
  8. Verfahren zur Formgebung eines Stahlblechs, das mit einer metallischen Beschichtung auf Basis Aluminium beschichtet ist, die hauptsächlich in zwei Schichten unterteilt ist:
    eine Innenschicht (7), die im wesentlichen aus einer oder mehreren Legierungen auf Basis Eisen, Aluminium und/oder Silizium besteht
    eine Aussenschicht (8), die im wesentlichen aus einer Phase auf Basis Aluminium und zusätzlichen anderen Phasen in Form von Nadeln oder langgestreckten Lamellen (9) besteht, die in der Phase auf Basis Aluminium verteilt sind und deren Dicke grösser oder gleich derjenigen der inneren Legierungsschicht (7) ist,
    dadurch gekennzeichnet, dass vor dem eigentliche Schritt der Formgebung des Blechs dieses Blech einer thermischen Behandlung unterzogen wird, die derart ausgelegt ist, dass wenigstens die Aussenschicht (8) auf eine Temperatur gebracht wird, die höher als 570° C und niedriger als 660° C ist, bei der ein Schmelzen der eutektischen Phasen der Aussenschicht gewährleistet ist, unter Bedingungen insbesondere der Aufheiz- und Abkühlgeschwindigkeiten, die derart gewählt sind, dass:
    die Dicke der Aussenschicht (8) grösser oder gleich derjenigen der inneren Legierungsschicht (7) ist
    die Projektion der Länge einer jeden Nadel oder Lamelle (9) in eine Richtung senkrecht zur Ebene der Aussenschicht (8) auf jeden Fall kleiner als die Dicke der Aussenschicht (8) ist und
    zur erheblichen Verringerung des Anteils an Nadeln und Lamellen in der Aussenschicht die Dauer der thermischen Behandlung während des Zeitraums, in dem die Temperatur oberhalb 570° C liegt, kleiner oder gleich 15 Sekunden beträgt.
EP99400414A 1998-02-25 1999-02-22 Stahlplatte mit spannungsrissbeständiger Aluminiumbeschichtung Expired - Lifetime EP0939141B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9802265 1998-02-25
FR9802265A FR2775297B1 (fr) 1998-02-25 1998-02-25 Tole dotee d'un revetement d'aluminium resistant a la fissuration

Publications (2)

Publication Number Publication Date
EP0939141A1 EP0939141A1 (de) 1999-09-01
EP0939141B1 true EP0939141B1 (de) 2002-04-10

Family

ID=9523346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400414A Expired - Lifetime EP0939141B1 (de) 1998-02-25 1999-02-22 Stahlplatte mit spannungsrissbeständiger Aluminiumbeschichtung

Country Status (7)

Country Link
US (2) US6328824B1 (de)
EP (1) EP0939141B1 (de)
AT (1) ATE215996T1 (de)
BR (1) BR9900785A (de)
CA (1) CA2263019A1 (de)
DE (1) DE69901197T2 (de)
FR (1) FR2775297B1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775297B1 (fr) * 1998-02-25 2000-04-28 Lorraine Laminage Tole dotee d'un revetement d'aluminium resistant a la fissuration
CN100370054C (zh) * 2001-06-15 2008-02-20 新日本制铁株式会社 镀有铝合金体系的高强度钢板以及具有优异的耐热性和喷漆后耐腐蚀性的高强度汽车零件
WO2003078676A1 (de) * 2002-03-18 2003-09-25 Karl Merz Verfahren und vorrichtung zum alfinieren von bauteilen
WO2007118939A1 (fr) 2006-04-19 2007-10-25 Arcelor France Procede de fabrication d'une piece soudee a tres hautes caracteristiques mecaniques a partir d'une tole laminee et revetue
WO2009090443A1 (en) * 2008-01-15 2009-07-23 Arcelormittal France Process for manufacturing stamped products, and stamped products prepared from the same
DE102008006771B3 (de) * 2008-01-30 2009-09-10 Thyssenkrupp Steel Ag Verfahren zur Herstellung eines Bauteils aus einem mit einem Al-Si-Überzug versehenen Stahlprodukt und Zwischenprodukt eines solchen Verfahrens
ES2535676T3 (es) * 2010-06-21 2015-05-13 Nippon Steel & Sumitomo Metal Corporation Chapa de acero revestida de Al por inmersión en caliente, con excelente resistencia al ennegrecimiento por calor y un método para la producción de la misma
KR102227111B1 (ko) 2018-11-30 2021-03-12 주식회사 포스코 열간성형 부재 및 그 제조방법
MX2021006197A (es) 2018-11-30 2021-08-16 Posco Lamina de acero chapada con aleacion de al-fe para formacion en prensa caliente que tiene excelente resistencia a la corrosion y resistencia al calor, parte formada en prensa caliente y metodo de manufactura para la misma.
WO2023200529A1 (en) * 2022-04-11 2023-10-19 Cleveland-Cliffs Steel Properties Inc. Super commercial quality high temperature alloy-resistant aluminized steel with moderate formability

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212181A1 (de) * 1982-04-01 1983-10-06 Nisshin Steel Co Ltd Stahltraeger fuer eine flachdruckplatte, sowie verfahren zur herstellung
US4595980A (en) * 1983-07-27 1986-06-17 International Business Machines Corp. Interactive data processing system having concurrent multi-lingual inputs
JPS61113754A (ja) * 1984-11-09 1986-05-31 Nippon Steel Corp 光沢保持性耐熱溶融アルミニウムめつき鋼板
US5023113A (en) * 1988-08-29 1991-06-11 Armco Steel Company, L.P. Hot dip aluminum coated chromium alloy steel
DE4222211C1 (de) * 1992-07-07 1993-07-22 Mtu Muenchen Gmbh
FR2726578B1 (fr) * 1994-11-04 1996-11-29 Lorraine Laminage Procede de revetement au trempe d'une tole d'acier par une couche metallique a base d'aluminium ou de zinc
EP0760399B1 (de) * 1995-02-24 2003-05-14 Nisshin Steel Co., Ltd. Heisstauchbeschichtetes aluminisiertes blech, verfahren zu dessen herstellung und legierungsschichtkontrollvorrichtung
DE69603782T2 (de) * 1995-05-18 2000-03-23 Nippon Steel Corp Aluminiumbeschichtetes Stahlband mit sehr guter Korrosions- und Wärmebeständigkeit und zugehöriges Herstellungsverfahren
FR2775297B1 (fr) * 1998-02-25 2000-04-28 Lorraine Laminage Tole dotee d'un revetement d'aluminium resistant a la fissuration

Also Published As

Publication number Publication date
US6395407B2 (en) 2002-05-28
DE69901197T2 (de) 2002-10-02
US6328824B1 (en) 2001-12-11
ATE215996T1 (de) 2002-04-15
US20020018909A1 (en) 2002-02-14
FR2775297B1 (fr) 2000-04-28
FR2775297A1 (fr) 1999-08-27
DE69901197D1 (de) 2002-05-16
EP0939141A1 (de) 1999-09-01
CA2263019A1 (fr) 1999-08-25
BR9900785A (pt) 1999-12-14

Similar Documents

Publication Publication Date Title
EP3783116B1 (de) Vorbeschichtete blätter, die die herstellung von druckgehärteten und beschichteten stahlteilen erlauben
CA2815018C (fr) Tole d'acier laminee a chaud ou a froid, son procede de fabrication et son utilisation dans l'industrie automobile
CA2623146C (fr) Procede de fabrication d'une piece en acier de microstructure multi-phasee
CA2584449C (fr) Procede de revetement au trempe a chaud dans un bain de zinc des bandes en acier fer-carbone-manganese
CA2218445C (fr) Tole aluminiee a faible emissivite
EP0939141B1 (de) Stahlplatte mit spannungsrissbeständiger Aluminiumbeschichtung
EP2954086B1 (de) Metallblech mit einer znalmg-beschichtung mit einer besonderen mikrostruktur und entsprechendes herstellungsverfahren
FR2472022A1 (fr) Procede de production d'une tole d'acier laminee a deux phases dont une est formee par refroidissement rapide apres recuit continu
WO2011104443A1 (fr) Procédé de fabrication d'une pièce a partir d'une tôle revêtue d'aluminium ou d'alliage d'aluminium
EP0571521B1 (de) Metalldraht aus einem stahlsubstrat mit kaltgehärteter geglühter martensitischer struktur und beschichtung
EP1534869B1 (de) Ultrahochfester stahl und verfahren zur herstellung eines mit zink oder zinklegierung platierten stahlbleches
CA1293163C (fr) Procede de revetement protecteur de produits siderurgiques
CA2298312C (fr) Procede d'aluminiage d'acier permettant d'obtenir une couche d'alliage interfaciale de faible epaisseur
EP1354070B1 (de) Isotropischer hochfester stahl, verfahren zur herstellung von blechen und hergestellte bleche
CA2246858C (fr) Procede pour la fabrication d'une tole d'acier galvanise allie sans phase dzeta en surface
BE1004077A3 (fr) Procede pour le revetement au trempe d'une bande d'acier en continu.
CA2565931C (fr) Bain de galvanisation a chaud de pieces en une nuance d'acier quelconque
EP0848076A1 (de) Verfahren zur Heisstauch-Beschichtung einer Stahlplatte; galvanisierte oder aluminisierte Stahlplatte so hergestellt

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

AK Designated contracting states

Kind code of ref document: A1

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

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RTI1 Title (correction)

Free format text: STEEL PLATE WITH ALUMINUM COATING HAVING STRESS CRACKING RESISTANCE

17P Request for examination filed

Effective date: 20000301

AKX Designation fees paid

Free format text: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

17Q First examination report despatched

Effective date: 20010219

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: IE

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: 20020410

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: 20020410

Ref country code: FI

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: 20020410

Ref country code: AT

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: 20020410

REF Corresponds to:

Ref document number: 215996

Country of ref document: AT

Date of ref document: 20020415

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

REF Corresponds to:

Ref document number: 69901197

Country of ref document: DE

Date of ref document: 20020516

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020710

Ref country code: PT

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: 20020710

Ref country code: DK

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: 20020710

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

Effective date: 20020704

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20021030

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

Ref document number: 0939141E

Country of ref document: IE

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

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: 20030228

Ref country code: CH

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

Effective date: 20030228

26N No opposition filed

Effective date: 20030113

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: NL

Payment date: 20070204

Year of fee payment: 9

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

Ref country code: DE

Payment date: 20070215

Year of fee payment: 9

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

Ref country code: GB

Payment date: 20070221

Year of fee payment: 9

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

Ref country code: LU

Payment date: 20070228

Year of fee payment: 9

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

Ref country code: IT

Payment date: 20070518

Year of fee payment: 9

Ref country code: BE

Payment date: 20070416

Year of fee payment: 9

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

Ref country code: FR

Payment date: 20070208

Year of fee payment: 9

BERE Be: lapsed

Owner name: *SOLLAC

Effective date: 20080228

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

Effective date: 20080222

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

Effective date: 20080901

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: 20080901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081031

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: 20080902

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: 20080228

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: 20080229

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: 20080222

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: 20080222

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: 20080222