EP2768989A1 - Acier en bandes galvanisé à chaud à haute résistance - Google Patents

Acier en bandes galvanisé à chaud à haute résistance

Info

Publication number
EP2768989A1
EP2768989A1 EP20120759372 EP12759372A EP2768989A1 EP 2768989 A1 EP2768989 A1 EP 2768989A1 EP 20120759372 EP20120759372 EP 20120759372 EP 12759372 A EP12759372 A EP 12759372A EP 2768989 A1 EP2768989 A1 EP 2768989A1
Authority
EP
European Patent Office
Prior art keywords
steel strip
max
hot dip
dip galvanised
mpa
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
EP20120759372
Other languages
German (de)
English (en)
Other versions
EP2768989B1 (fr
Inventor
Bernard Leo Ennis
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.)
Tata Steel Ijmuiden BV
Original Assignee
Tata Steel Ijmuiden 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
Application filed by Tata Steel Ijmuiden BV filed Critical Tata Steel Ijmuiden BV
Priority to EP12759372.1A priority Critical patent/EP2768989B1/fr
Publication of EP2768989A1 publication Critical patent/EP2768989A1/fr
Application granted granted Critical
Publication of EP2768989B1 publication Critical patent/EP2768989B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • C21D1/19Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20Isothermal quenching, e.g. bainitic hardening
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224Two or more thermal pretreatments
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/001Austenite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/002Bainite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/005Ferrite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/008Martensite
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771Transition metal-base component
    • Y10T428/12785Group IIB metal-base component
    • Y10T428/12792Zn-base component
    • Y10T428/12799Next to Fe-base component [e.g., galvanized]

Definitions

  • the invention relates to a high strength hot dip galvanised steel strip having improved formability, such as used in the automotive industry.
  • Such steel types are known and have been developed under the name of dual phase steel types. Such steel types do not provide the required formability as required in many applications for the automotive industry. For this reason, TRIP assisted dual phase steel types have been developed.
  • EP 1 889 935 Al A document describing such steel types is EP 1 889 935 Al .
  • This document describes a high strength hot dip galvanised steel sheet containing (in mass percent) 0.05 - 0.3 % C
  • TRIP assisted dual phase steel strip Formability, however, is not the only requirement for a TRIP assisted dual phase steel strip.
  • the alloying elements should be low in amount to make the cost of the steel as low as possible, it should be as easy as possible to produce the steel strip and to coat it, the steel strip has to have high strength, good weldability and should also exhibit a good surface quality. These requirements are especially important for industrially produced TRIP assisted dual phase steel types, which have to be formed into for instance automotive parts that will be spot welded into a body in white.
  • the balance being Fe and inevitable impurities
  • the inventors have found that by a careful selection of the amounts of the main constituting elements of the steel, being carbon, manganese, silicon, aluminium and chromium, a high strength hot dip galvanised steel strip can be produced that has the required formability, processability, strength and elongation, while at the same time providing a sufficient weldability, coatability and surface quality. It has been found by the inventors that none of the examples given in the state of the art provide all these requirements at the same time.
  • Si is traditionally used to effectuate the TRIP effect, due to retardation of carbide formation in the presence of Si which leads to carbon enrichment and, hence, stabilisation of austenite at room temperature.
  • the disadvantages of Si are that in very high quantities (above 0.4 wt. %) it interferes with the wettability of zinc, making galvanisation over tradition continuous annealing lines impossible. It has also been shown in EP 1 889 935 Al that Si can be replaced by relatively high quantities of Al.
  • the present invention shows that the addition of Si can be omitted and Al kept to a minimum by careful selection of the Cr content and with the addition of Nb.
  • composition of the steel strip according to the invention is such that the formability of the steel is good and no necking occurs, and that the edge ductility of pressed parts is such that no cracking occurs.
  • the reason for the amounts of the main constituting elements is as follows.
  • C 0.13 - 0.19 mass %.
  • Carbon has to be present in an amount that is high enough to ensure hardenability and the formation of martensite at the cooling rates available in a conventional annealing/galvanising line. Martensite is required to deliver adequate strength. Free carbon also enables stabilisation of austenite which delivers improved work hardening potential and good formability for the resulting strength level. A lower limit of 0.13 mass % is desired for these reasons. A maximum level of 0.19 mass % has been found to be essential to ensure good weldability. Mn: 1.70 - 2.50 mass %. Manganese is added to increase hardenability thus making the formation of martensite easier within the cooling rate capability of a conventional continuous annealing/galvanising line.
  • Manganese also contributes to the solid solution strengthening which increases the tensile strength and strengthens the ferrite phase, thus helping to stabilise retained austenite.
  • Manganese lowers the transformation temperature range of the dual phase steel, thus lowering the required annealing temperature to levels that can be readily attained in a conventional continuous annealing/galvanising line.
  • a lower limit of 1.70 mass % is needed for the above reasons.
  • a maximum level of 2.50 mass % is imposed to ensure acceptable rolling forces in the hot mill and to ensure acceptable rolling forces in the cold mill by ensuring sufficient transformation of the dual phase steel to soft transformation products (ferrite and pearlite). This maximum level is also given in view of the stronger segregation during casting and the forming of a band of martensite in the strip at higher values.
  • Al 0.40 - 1.00 mass %. Aluminium is added to liquid steel for the purpose of de- oxidation. In the right quantity it also provides an acceleration of the bainite transformation, thus enabling bainite formation within the time constraints imposed by the annealing section of a conventional continuous annealing/galvanising line. Aluminium also retards the formation of carbides thus keeping carbon in solution thus causing partitioning to austenite during overaging, and promoting the stabilisation of austenite. A lower level of 0.40 mass % is required for the above reasons. A maximum level of 1.00 mass % is imposed for castability, since high aluminium contents lead to poisoning of the casting mould slag and consequently an increase in mould slag viscosity, leading to incorrect heat transfer and lubrication during casting.
  • Cr 0.05 - 0.25 mass %. Chrome is added to increase hardenability. Chrome forms ferrite and suppresses the formation of carbides, thus enhancing the forming of retained austenite. A lower level of 0.05 mass % is required for the above reasons. A maximum level of 0.25 mass % is imposed to ensure satisfactory pickling of the steel strip, and to keep the cost of the strip sufficiently low.
  • Ca max 0.004 mass %.
  • the addition of calcium modifies the morphology of manganese sulphide inclusions. When calcium is added the inclusions get a globular rather than an elongated shape. Elongated inclusions, also called stringers, may act as planes of weakness along which lamellar tearing and delamination fracture can occur. The avoidance of stringers is beneficial for forming processes of steel sheets which entail the expansion of holes or the stretching of flanges and promotes isotropic forming behaviour.
  • Calcium treatment also prevents the formation of hard, angular, abrasive alumina inclusions in aluminium deoxidised steel types, forming instead calcium aluminate inclusions which are softer and globular at rolling temperatures, thereby improving the material's processing characteristics.
  • some inclusions occurring in molten steel have a tendency to block the nozzle, resulting in lost output and increased costs.
  • Calcium treatment reduces the propensity for blockage by promoting the formation of low melting point species which will not clog the caster nozzles.
  • P max 0.10 mass %. Phosphorus interferes with the formation of carbides, and therefore some phosphorus in the steel is advantageous. However, phosphorus can make steel brittle upon welding, so the amount of phosphorus should be carefully controlled, especially in combination with other embrittling elements such as sulphur and nitrogen.
  • Niobium is added in an amount between 0.01 and 0.05 mass % for grain refinement and formability. Niobium promotes transformation on the runout table and thus provides a softer and more homogeneous intermediate product. Niobium further suppresses formation of martensite at isothermal overaging temperatures, thereby promoting stabilisation of retained austenite.
  • the optional elements are mainly added to strengthen the steel.
  • the ranges for aluminium, chromium and manganese are chosen such that a correct balance is found to deliver complete transformation on the runout table to ensure a steel strip that can be cold rolled, and to provide a starting structure enabling rapid dissolution of carbon in the annealing line to promote hardenability and correct ferritic/bainitic transformation behaviour.
  • aluminium accelerates and chromium decelerates the bainitic transformation
  • the right balance between aluminium and chromium has to be present to produce the right quantity of bainite within the timescales permitted by a conventional hot dip galvanising line with a restricted overage section.
  • the relative amounts of certain elements are of importance.
  • Aluminium and silicon together should be maintained between 0.4 and 1.05 mass % to ensure suppression of carbides in the end product and stabilisation of a sufficient amount of austenite, with the correct composition, to provide a desirable extension of formability.
  • Manganese and chromium together should be above 1.90 mass % to ensure sufficient hardenability for formation of martensite and thus achievement of strength in a conventional continuous annealing line and hot dip galvanising line.
  • element C is present in an amount of 0.13 - 0.16 %. In this range the hardenability of the steel is optimal while the weldability of the steel is enhanced.
  • element Mn is present in an amount of 1.95
  • a higher amount of manganese provides steel with a higher strength, so it is advantageous to raise the lower limit to 1.95 or even 2.00 mass % manganese.
  • hot rolling and cold rolling of the steel is more difficult for higher amounts of manganese, so it is advantageous to lower the upper limit to 2.40, 2.30 or even 2.20 mass % manganese.
  • element Si is present in an amount of 0.05 - 0.15 %.
  • Si ensures a better retardation of carbides during overaging which is advantageous for the formability of the steel.
  • element Al is present in an amount of 0.60
  • a raised lower level of aluminium has the same effect as a higher amount of silicon, but also improves the bainite formation.
  • a lower upper limit of aluminium improves the castability of the steel.
  • element Cr is present in an amount of 0.10 - 0.25 %.
  • a raised lower level increases the hardenability of the steel.
  • element Nb is present in an amount of 0.01
  • niobium improves the homogeneity of the intermediate product.
  • the upper limit is mainly in consideration of the cost of niobium.
  • the steel has an ultimate tensile strength Rm of at least 700 MPa, more preferably an ultimate tensile strength Rm of at least 750 MPa.
  • This strength can, due to the careful selection of the amounts of the elements present in the steel, be reached while the formability of a conventional 600 MPa dual phase steel is maintained.
  • the hot dip galvanised steel strip has an 0.2 % proof strength Rp of at least 400 MPa, preferably an 0.2 % proof strength Rp of at least 450 MPa. Also this strength can be reached due to the careful selection of the amounts of the elements present in the steel.
  • the hot dip galvanised steel strip has a total elongation of at least 18 %. This is a high elongation which is also reached by the chosen presence of the elements in the steel.
  • the hot dip galvanised steel strip has a hole expansion coefficient of at least 35 % when Rm is 750 MPa and Rp is 450 MPa. This is a good hole expansion coefficient, as will be elucidated below. The hole expansion coefficient decreases with increasing strength.
  • the hot dip galvanised steel strip has an Erichsen cupping index of more than 10.5 mm when Rm is 750 MPa and Rp is 450 MPa. This is satisfactory for the usability of the steel.
  • the Erichsen cupping index decreases with increasing strength.
  • the hot dip galvanised steel strip has a dual phase structure containing 8 - 12 % retained austenite, 10 - 20 % martensite, the remainder being a mixture of ferrite and bainite, preferably the hot dip galvanised steel strip containing not more than 10 % bainite. With such microstructures, a high elongation and a high strength will be reached.
  • the hot dip galvanised steel strip has an average grain size of at most 5 ⁇ . This small grain size helps to achieve the above mentioned mechanical properties of the steel.
  • a method for producing a high strength hot dip galvanised steel strip as defined above, wherein the cast steel is hot rolled and cold rolled to a strip having a desired thickness, after which the strip is reheated in an annealing line to a temperature above the Acl temperature and preferably between the Acl and the Ac3 temperature of the steel type and fast cooled at a cooling rate such as to avoid retransformation to ferrite, after which isothermal overaging is applied to form bainite, and the strip is hot dip galvanised.
  • the deformation schedule during hot rolling, the finish rolling temperature and the subsequent cooling pattern on a run-out table can be selected to achieve a microstructure in the hot rolled product which is conducive to further reduction of thickness in the cold mill.
  • the temperature in the annealing line can be chosen such that the steel strip comprises both ferrite and austenite.
  • the cooling rate should be such that in principle no ferrite is formed, and the isothermal overaging is applied to promote the formation of bainite.
  • Hot dip galvanising can be performed in the usual manner. During this method the temperature and duration of most steps is critical for the realisation of the desired balance between strength and ductility in the final product.
  • the annealing will be carried out a temperature between 750°C and 850°C and more preferably at a temperature between 780°C and 820°C. At these temperatures the steel strip comprises both ferrite and austenite.
  • the overaging is applied at a temperature between 360°C and 480°C.
  • the iron-carbon eutectoid system has a number of critical transformation temperatures as defined below. These temperatures are dependent on chemistry and processing conditions:
  • A2 - Curie temperature temperature above which the material ceases to be magnetic
  • the suffixes c and r denote transformations in the heating and cooling cycle respectively.
  • the invention will be elucidated hereinafter; a number of compositions will be evaluated with regard to some well-known formability parameters that are elucidated first.
  • n-value The work hardening coefficient or n- value is closely related to uniform elongation. In most sheet forming processes the limit of formability is determined by the resistance to local thinning or "necking". In uniaxial tensile testing necking commences at the extent of uniform elongation, n-value and uniform elongation derived from the tensile test can be taken as a measure of the formability of sheet steels. When aiming to improve formability of strip steels n-value and uniform elongation represent the most suitable optimisation parameters.
  • Hole expansion coefficient To be successfully applied in industrial stamping operations, sheet metals must have a certain ability to withstand stretching of their sheared edges. This is tested in accordance with the international technical specification ISO/TS 16630. A hole having a diameter of 10mm is made in the centre of a test piece having the dimensions 90 x 90mm. A cone punch of 40mm diameter with a 60° apex is forced into the hole while the piece is fixed with a die having an inner diameter of 55mm. The diameter of the hole is measured when a crack had extended through the thickness of the test piece.
  • Max HEC % ((Dh - Do)/Do) x 100, wherein Do is the original hole diameter and Dh is the diameter of the hole after cracking. Stretch flangeability is evaluated on the basis of the maximum HEC and is deemed satisfactory when HEC > 25%
  • EI Erichsen Index
  • ISO 20482:2003 The Erichsen test describes the ability of metals to undergo plastic deformation in stretch forming and is tested in accordance with the international standard test ISO 20482:2003.
  • a hemispherical punch is driven into a fully clamped sheet.
  • As lubrication graphite grease is used on top of the punch.
  • the punch travel is stopped when a through thickness crack is detected. Due to friction the fracture is not on top of the punch but to the side, so not in equi bi-axial strain but more towards plane strain.
  • the depth of the punch penetration is measured.
  • the value of the Erichsen cupping index (IE) is the average of a minimum of three individual measurements, expressed in millimetres and for the present invention is deemed satisfactory when EI > 10mm.
  • Weldability Resistance spot welding is the major joining technique used in the automotive industry, with an average car containing around 2000 - 3000 spot welds. Traditionally spot welds have always been a very cheap and reliable joint type, however since the introduction of AHSS, this reliability has been compromised. The weldability is measured by the ability of the material to be spot-welded. Welding conditions were taken from BS 1 140: 1993 which are standard for industry, although not necessarily optimised for AHSS. Spot-weldability is measured by the failure mode of the resultant spot- weld (plug). When a material cannot be welded then the plug will split along the interface between the two joining surfaces.
  • the failure will be in the parent metal, outside of the plug and preferably also outside the heat-affected zone. This is known as full-plug failure, that is the full plug is pulled out of the parent metal. Spot-weldability can be expressed on the scale between full-interface failure and full-plug failure with the former being deemed un-weldable.
  • One of the aims of the present invention is to provide a high strength hot dip galvanised steel strip that has a formability in the range of a 600MPa AHSS hot dip galvanised steel strip, but having a strength level of at least 700 MPa. This is achieved by realising a suitable increase in the uniform elongation and n-value.
  • Table 1 shows six different alloys A to F, of which alloys B, C and F have a composition according to the invention and alloys A, D and E are comparative examples.
  • alloys A, D and E processing conditions according to the invention have been applied as shown in Table 2.
  • the mechanical properties of the alloys A and E are clearly outside the values as desired for according to the invention, because for alloy A the Rp value is below 400 MPa, and for alloy E the hole expansion coefficient is only 25% and the Erichsen cupping index is less than 10.
  • Alloy D has a composition according to the invention, but the Si level is too high.
  • Table 2 shows that the mechanical properties as measured fall within the values as desired for according to the invention, though the Rm value is only just above the lower limit of 700 MPa, and clearly lower than the preferred value of at least 750 MPa.
  • the structure of alloy D is not in accordance with the desired structure, because the amount of martensite and retained austenite is too low.
  • Alloy B is an alloy according to the invention.
  • different processing conditions have been applied as shown in Table 2.
  • Different annealing temperatures and different isothermal holding temperatures result in mechanical properties that fulfil the desired values according to the invention as regards the ultimate tensile strength and the 0.2% proof strength, though desired total elongation is not always met. This occurs when the overaging temperature is above the optimum bainite holding temperature (i.e. above 480°C), thus reducing the amount of retained austenite available.
  • Alloy C is also an alloy according to the invention.
  • this alloy two different processing conditions have been applied as shown in Table 2.
  • the ultimate tensile strength Pan is more than 750 MPa and the total elongation is more than 18 %.
  • the Erichsen Index is more than 10, the n-value is 0.17 and the HEC is above 30.
  • Alloy F is another alloy according to the invention. Three different processing conditions have been applied, as shown in Table 2, and in all three cases the ultimate tensile strength is more than 750 MPa, the total elongation is even more than 19 %, and the n-value is 0.15 or more. Where measured, the Erichsen Index is more than 10 and the HEC is above 30.
  • Hole expansion coefficient HEC and Erichsen cupping index EI are not always measured but where measured the value is satisfactory. Also the work hardening coefficient or n-value is good in all cases.
  • the TRIP assisted dual phase steel according to the invention with low amounts of silicon thus shows to be a steel type that gives satisfactory mechanical properties, contrary to the expectation by the person skilled in the art that a certain amount of added silicon is always needed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Coating With Molten Metal (AREA)

Abstract

L'invention se rapporte à un acier en bandes galvanisé à chaud à haute résistance qui se compose, en pourcentage en masse, des éléments suivants : le carbone (C) en une quantité comprise entre 0,13 et 0,19 % ; le manganèse (Mn) en une quantité comprise entre 1,70 et 2,50 % ; le silicium (Si) en une quantité maximale de 0,15 % ; l'aluminium (Al) en une quantité comprise entre 0,40 et 1,00 % ; le chrome (Cr) en une quantité comprise entre 0,05 et 0,25 % ; le niobium (Nb) en une quantité comprise entre 0,01 et 0,05 % ; le phosphore (P) en une quantité maximale de 0,10 % ; le calcium (Ca) en une quantité maximale de 0,004 % ; le soufre (S) en une quantité maximale de 0,05 % ; l'azote (N) en une quantité maximale de 0,007 % et facultativement au moins l'un des éléments suivants : le titane (Ti) en une quantité maximale de 0,50 % ; le vanadium (V) en une quantité maximale de 0,40 % ; le molybdène (Mo) en une quantité maximale de 0,50 % ; le nickel (Ni) en une quantité maximale de 0,50 % ; le cuivre (Cu) en une quantité maximale de 0,50 % ; le bore (B) en une quantité maximale de 0,005 %, le reste étant du fer (Fe) et des impuretés inévitables, et 0,40 % < Al + Si < 1,05 % et Mn + Cr > 1,90 %. Cet acier présente une meilleure aptitude à la déformation à une résistance élevée, une bonne soudabilité et une bonne qualité de surface ainsi qu'une bonne aptitude à la production et au revêtement.
EP12759372.1A 2011-09-13 2012-09-12 Acier en bandes galvanisé à chaud à haute résistance Active EP2768989B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12759372.1A EP2768989B1 (fr) 2011-09-13 2012-09-12 Acier en bandes galvanisé à chaud à haute résistance

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11007431 2011-09-13
EP12759372.1A EP2768989B1 (fr) 2011-09-13 2012-09-12 Acier en bandes galvanisé à chaud à haute résistance
PCT/EP2012/003823 WO2013037485A1 (fr) 2011-09-13 2012-09-12 Acier en bandes galvanisé à chaud à haute résistance

Publications (2)

Publication Number Publication Date
EP2768989A1 true EP2768989A1 (fr) 2014-08-27
EP2768989B1 EP2768989B1 (fr) 2015-11-18

Family

ID=46851934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12759372.1A Active EP2768989B1 (fr) 2011-09-13 2012-09-12 Acier en bandes galvanisé à chaud à haute résistance

Country Status (13)

Country Link
US (1) US20140205858A1 (fr)
EP (1) EP2768989B1 (fr)
JP (1) JP2014531511A (fr)
KR (1) KR20140068186A (fr)
CN (1) CN103857808B (fr)
BR (1) BR112014005641A2 (fr)
CA (1) CA2848161A1 (fr)
ES (1) ES2562478T3 (fr)
IN (1) IN2014CN02734A (fr)
MX (1) MX2014002922A (fr)
PT (1) PT2768989E (fr)
WO (1) WO2013037485A1 (fr)
ZA (1) ZA201402590B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020245678A1 (fr) 2019-06-03 2020-12-10 Arcelormittal Tôle d'acier laminée à froid et revêtue et son procédé de fabrication
WO2020245668A1 (fr) 2019-06-03 2020-12-10 Arcelormittal Tôle d'acier laminée à froid et revêtue et son procédé de fabrication
WO2021123880A1 (fr) * 2019-12-18 2021-06-24 Arcelormittal Tôle d'acier laminée à froid et recuite et son procédé de fabrication
WO2023281035A1 (fr) * 2021-07-07 2023-01-12 Tata Steel Ijmuiden B.V. Bande d'acier à deux phases revêtue à haute résistance et son procédé de production

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2903916A1 (fr) * 2013-03-11 2014-09-18 Tata Steel Ijmuiden Bv Bande d'acier haute resistance, a phase complexe et galvanisee a chaud
DE102014017274A1 (de) * 2014-11-18 2016-05-19 Salzgitter Flachstahl Gmbh Höchstfester lufthärtender Mehrphasenstahl mit hervorragenden Verarbeitungseigenschaften und Verfahren zur Herstellung eines Bandes aus diesem Stahl
KR20180025852A (ko) * 2015-07-01 2018-03-09 타타 스틸 이즈무이덴 베.뷔. 고강도 용융 침지 아연도금 강 스트립
JP7019574B2 (ja) 2015-12-15 2022-02-15 タタ、スティール、アイモイデン、ベスローテン、フェンノートシャップ 高強度溶融亜鉛めっき鋼帯
WO2018157136A1 (fr) * 2017-02-27 2018-08-30 Nucor Corporation Traitement thermique pour affinage de grain d'austénite
WO2018220430A1 (fr) * 2017-06-02 2018-12-06 Arcelormittal Tôle d'acier destinée à la fabrication de pièces trempées à la presse, pièce trempée à la presse présentant une association de résistance élevée et de ductilité d'impact, et procédés de fabrication de cette dernière
DE102021121997A1 (de) 2021-08-25 2023-03-02 Thyssenkrupp Steel Europe Ag Kaltgewalztes Stahlflachprodukt und Verfahren zu seiner Herstellung
CN115537665A (zh) * 2022-10-14 2022-12-30 山东钢铁集团日照有限公司 一种可用相同原料生产连退、镀锌两类590MPa级DH钢的生产方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01127623A (ja) 1987-11-09 1989-05-19 Sumitomo Metal Ind Ltd 加工性と耐食性の良好な高強度鋼板の製造法
US20090211668A1 (en) 2005-04-20 2009-08-27 Nippon Steel Corporation Method for producing high-strength hot-dip galvannealed steel sheet
JP2010132975A (ja) 2008-12-05 2010-06-17 Jfe Steel Corp 高強度溶融亜鉛めっき鋼板及び高強度合金化溶融亜鉛めっき鋼板の製造方法
JP2010255100A (ja) 2009-03-31 2010-11-11 Jfe Steel Corp 高強度溶融亜鉛めっき鋼板およびその製造方法
FI20090387A (fi) 2009-10-23 2011-04-24 Rautaruukki Oyj Menetelmä korkealujuuksisen terästuotteen valmistamiseen sekä terästuote

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5328528A (en) * 1993-03-16 1994-07-12 China Steel Corporation Process for manufacturing cold-rolled steel sheets with high-strength, and high-ductility and its named article
JP4000974B2 (ja) * 2002-09-25 2007-10-31 住友金属工業株式会社 高張力合金化溶融亜鉛めっき鋼板およびその製造方法
JP4528137B2 (ja) * 2004-03-19 2010-08-18 新日本製鐵株式会社 穴拡げ性に優れた高強度高延性薄鋼板の製造方法
JP4445365B2 (ja) * 2004-10-06 2010-04-07 新日本製鐵株式会社 伸びと穴拡げ性に優れた高強度薄鋼板の製造方法
CN101151392A (zh) * 2005-03-31 2008-03-26 杰富意钢铁株式会社 合金化热镀锌钢板及其制造方法
JP5250939B2 (ja) * 2005-03-31 2013-07-31 Jfeスチール株式会社 合金化溶融亜鉛めっき鋼板の製造方法
JP4956998B2 (ja) 2005-05-30 2012-06-20 Jfeスチール株式会社 成形性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法
DE102005051052A1 (de) * 2005-10-25 2007-04-26 Sms Demag Ag Verfahren zur Herstellung von Warmband mit Mehrphasengefüge
JP5167487B2 (ja) * 2008-02-19 2013-03-21 Jfeスチール株式会社 延性に優れる高強度鋼板およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01127623A (ja) 1987-11-09 1989-05-19 Sumitomo Metal Ind Ltd 加工性と耐食性の良好な高強度鋼板の製造法
US20090211668A1 (en) 2005-04-20 2009-08-27 Nippon Steel Corporation Method for producing high-strength hot-dip galvannealed steel sheet
JP2010132975A (ja) 2008-12-05 2010-06-17 Jfe Steel Corp 高強度溶融亜鉛めっき鋼板及び高強度合金化溶融亜鉛めっき鋼板の製造方法
JP2010255100A (ja) 2009-03-31 2010-11-11 Jfe Steel Corp 高強度溶融亜鉛めっき鋼板およびその製造方法
FI20090387A (fi) 2009-10-23 2011-04-24 Rautaruukki Oyj Menetelmä korkealujuuksisen terästuotteen valmistamiseen sekä terästuote

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020245678A1 (fr) 2019-06-03 2020-12-10 Arcelormittal Tôle d'acier laminée à froid et revêtue et son procédé de fabrication
WO2020245668A1 (fr) 2019-06-03 2020-12-10 Arcelormittal Tôle d'acier laminée à froid et revêtue et son procédé de fabrication
WO2020245627A1 (fr) 2019-06-03 2020-12-10 Arcelormittal Tôle d'acier laminée à froid et revêtue et son procédé de fabrication
WO2020245626A1 (fr) 2019-06-03 2020-12-10 Arcelormittal Tôle d'acier laminée à froid et revêtue et son procédé de fabrication
WO2021123880A1 (fr) * 2019-12-18 2021-06-24 Arcelormittal Tôle d'acier laminée à froid et recuite et son procédé de fabrication
WO2023281035A1 (fr) * 2021-07-07 2023-01-12 Tata Steel Ijmuiden B.V. Bande d'acier à deux phases revêtue à haute résistance et son procédé de production

Also Published As

Publication number Publication date
ZA201402590B (en) 2015-07-29
BR112014005641A2 (pt) 2017-03-28
EP2768989B1 (fr) 2015-11-18
KR20140068186A (ko) 2014-06-05
CN103857808A (zh) 2014-06-11
CA2848161A1 (fr) 2013-03-21
ES2562478T3 (es) 2016-03-04
CN103857808B (zh) 2016-11-23
WO2013037485A1 (fr) 2013-03-21
PT2768989E (pt) 2016-03-18
US20140205858A1 (en) 2014-07-24
JP2014531511A (ja) 2014-11-27
IN2014CN02734A (fr) 2015-07-03
MX2014002922A (es) 2014-05-21

Similar Documents

Publication Publication Date Title
EP2768989B1 (fr) Acier en bandes galvanisé à chaud à haute résistance
US9677150B2 (en) High strength hot dip galvanised steel strip
EP2971209B1 (fr) Bande dýacier à phase complexe galvanisé à chaud haute résistance
JP6108046B1 (ja) 高強度冷延鋼板、高強度溶融亜鉛めっき鋼板、および高強度合金化溶融亜鉛めっき鋼板
JP5598157B2 (ja) 耐遅れ破壊特性及び衝突安全性に優れたホットプレス用鋼板及びその製造方法
EP2729590A1 (fr) Bande d&#39;acier haute résistance laminée à chaud avec résistance élevée au ramollissement haz et son procédé de production
KR20060047587A (ko) 스폿 용접성 및 재질안정성이 우수한 고강도용융아연도금강판
RU2714975C1 (ru) Способ изготовления высокопрочной стальной полосы с улучшенными свойствами для дальнейшей обработки и стальная полоса такого типа
US20180230570A1 (en) High strength hot dip galvanised steel strip
CN103380217A (zh) 由复相钢制成的热轧钢板产品及其制造方法
JP4495064B2 (ja) 熱間プレス用鋼板
RU2734216C9 (ru) Способ изготовления плоского стального продукта из стали с содержанием марганца и такой плоский стальной продукт
CN113316649A (zh) 高强度高延展性的复相的冷轧钢带或板
JP2010180462A (ja) 冷延鋼板およびその製造方法
EP4308736A1 (fr) Bande, feuille ou ébauche d&#39;acier et procédé de production d&#39;une pièce formée à chaud ou d&#39;une pièce préformée traitée à chaud
CN115087751A (zh) 高可卷边的超高强度延展热轧钢,制造所述热轧钢的方法及其用途
EP3317431A1 (fr) Bande d&#39;acier galvanisé à chaud à haute résistance

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140414

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 8/02 20060101ALI20150423BHEP

Ipc: C22C 38/26 20060101ALI20150423BHEP

Ipc: C21D 9/46 20060101ALI20150423BHEP

Ipc: C21D 1/20 20060101AFI20150423BHEP

Ipc: C23C 2/02 20060101ALI20150423BHEP

Ipc: C22C 38/04 20060101ALI20150423BHEP

Ipc: C22C 38/06 20060101ALI20150423BHEP

INTG Intention to grant announced

Effective date: 20150522

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Owner name: TATA STEEL IJMUIDEN BV

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 761620

Country of ref document: AT

Kind code of ref document: T

Effective date: 20151215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602012012407

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2562478

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20160304

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20160208

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160218

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

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

Effective date: 20151118

Ref country code: HR

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: 20151118

Ref country code: LT

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: 20151118

Ref country code: NO

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: 20160218

Ref country code: IS

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: 20160318

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

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: 20151118

Ref country code: LV

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: 20151118

Ref country code: RS

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: 20151118

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: 20160219

Ref country code: PL

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: 20151118

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

Ref country code: CZ

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: 20151118

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602012012407

Country of ref document: DE

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

Ref country code: SM

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: 20151118

Ref country code: RO

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: 20151118

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: 20151118

Ref country code: EE

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: 20151118

Ref country code: SK

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: 20151118

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

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 5

26N No opposition filed

Effective date: 20160819

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

Ref country code: SI

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: 20151118

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

Ref country code: MC

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: 20151118

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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: 20160930

Ref country code: CH

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

Effective date: 20160930

Ref country code: IE

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

Effective date: 20160912

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: 20160912

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

REG Reference to a national code

Ref country code: AT

Ref legal event code: UEP

Ref document number: 761620

Country of ref document: AT

Kind code of ref document: T

Effective date: 20151118

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

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20120912

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

Ref country code: MT

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

Effective date: 20160930

Ref country code: CY

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: 20151118

Ref country code: MK

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: 20151118

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

Ref country code: BG

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: 20151118

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

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

Ref country code: AL

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: 20151118

Ref country code: TR

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: 20151118

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

Ref country code: NL

Payment date: 20220926

Year of fee payment: 11

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230517

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

Ref country code: GB

Payment date: 20230927

Year of fee payment: 12

Ref country code: AT

Payment date: 20230821

Year of fee payment: 12

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

Ref country code: SE

Payment date: 20230927

Year of fee payment: 12

Ref country code: PT

Payment date: 20230831

Year of fee payment: 12

Ref country code: FR

Payment date: 20230925

Year of fee payment: 12

Ref country code: DE

Payment date: 20230927

Year of fee payment: 12

Ref country code: BE

Payment date: 20230927

Year of fee payment: 12

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

Ref country code: ES

Payment date: 20231002

Year of fee payment: 12

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20231001