[go: up one dir, main page]

EP1263540B1 - Procede pour produire des pieces en acier a faible epaisseur de paroi, et pieces ainsi produites - Google Patents

Procede pour produire des pieces en acier a faible epaisseur de paroi, et pieces ainsi produites Download PDF

Info

Publication number
EP1263540B1
EP1263540B1 EP01900129A EP01900129A EP1263540B1 EP 1263540 B1 EP1263540 B1 EP 1263540B1 EP 01900129 A EP01900129 A EP 01900129A EP 01900129 A EP01900129 A EP 01900129A EP 1263540 B1 EP1263540 B1 EP 1263540B1
Authority
EP
European Patent Office
Prior art keywords
layers
procedure according
hardened
steel
composite material
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
EP01900129A
Other languages
German (de)
English (en)
Other versions
EP1263540A1 (fr
Inventor
Hans-Toni Junius
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CD Waelzholz Brockhaus GmbH
Original Assignee
Cd Walzholz Produktions-Gesellschaft Mbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cd Walzholz Produktions-Gesellschaft Mbh filed Critical Cd Walzholz Produktions-Gesellschaft Mbh
Publication of EP1263540A1 publication Critical patent/EP1263540A1/fr
Application granted granted Critical
Publication of EP1263540B1 publication Critical patent/EP1263540B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/008—Continuous casting of metals, i.e. casting in indefinite lengths of clad ingots, i.e. the molten metal being cast against a continuous strip forming part of the cast product
    • 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
    • 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
    • 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
    • Y10S428/9335—Product by special process
    • Y10S428/94—Pressure bonding, e.g. explosive
    • 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
    • Y10T428/12458—All metal or with adjacent metals having composition, density, or hardness gradient
    • 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
    • Y10T428/12472—Microscopic interfacial wave or roughness
    • 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.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12958—Next to Fe-base component
    • 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.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12958—Next to Fe-base component
    • Y10T428/12965—Both containing 0.01-1.7% carbon [i.e., steel]
    • 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.]
    • Y10T428/12986—Adjacent functionally defined components

Definitions

  • the present invention relates to a method for producing thin-walled Steel components, the layers of which different steel alloys exist according to The preamble of claim 1.
  • the invention further comprises thin-walled components made of steel with a core layer and edge layers.
  • thermal treatment namely martensitic or bainitic.
  • Made from hardening steel a component with a uniform, high hardness, which however has a low toughness.
  • a cheaper combination wear-resistant surfaces with high toughness in the core zone achieved the use of case-hardened steels.
  • Through a carburizing treatment in a thermochemical hardening process produces hardened, hard surface layers, while the core layer continues to maintain high toughness.
  • use properties are a relatively complex manufacturing process across from.
  • roll-clad is still a substitute for case hardening Steel known, two or more, differently alloyed strips or sheets, preferably from cold rolled strip.
  • the core and outer layers are made of different alloys Steels intimately connected to one another in the roll gap on the surfaces.
  • annealing results from the diffusion processes of the metallic composite.
  • Such a roll cladding process is specified, for example, in DE 41 37 118 A1.
  • this creates an abrupt, abrupt transition between the different layers of material.
  • the hardship transition between paid and unrefined layers is therefore also correspondingly steep, so that due to the load-induced stress gradient produces relatively thick boundary layers Need to become.
  • DE-A-198 15 007 and DE-A-198 50 213 describe methods and procedures manufactured thin metal tapes known, in which a core material an inexpensive material through a casting process with thin metal strips be cast in layers to form a composite material, the thin Metal strips for the production of corrosion-resistant and / or particularly smooth outer layers be used. A subsequent treatment is also in progress here on the influence of other properties of the composite material.
  • the task for the present invention is a rational process for the production of thin-walled components made of steel with different Strength and / or hardness properties. Furthermore, a Component with layers of different strength and / or hardness properties be specified, which is particularly cheaper due to the reduced effort than can be produced so far.
  • the method according to the invention for the production of thin-walled components Steel that has an inner core layer and outer peripheral layers sees here before that the core and outer layers of different steel alloys exist and in a casting process to a composite material with flat Alloy gradients are connected at the interfaces and the composite deformed to the dimensions of the thin-walled components and heat-treated and the heat treatment becomes a martensitic or bainitic Not all harden, but at least one of the layers leads.
  • the method according to the invention is characterized by core and edge layers made of steel materials with different strength and / or hardness properties, namely in particular different martensitic hardenability properties, to combine with each other so that thin-walled components are available be made, which the respective advantages of case hardening and Combine roll cladding.
  • the individual layers are preferably made of steel alloys with different martensitic hardenability properties, i.e. different grades formed on carbon, chromium and manganese, the subsequent influencing the strength and / or hardness properties due to martensitic or bainitic Heat treatment takes place, i.e. a heat treatment with the steps of heating-quenching-tempering.
  • they consist of their strength and / or Hardness properties of layers of higher alloy, i.e. carbon-rich steel than that not in their strength and / or hardness properties influenceable layers.
  • In the area of the flat alloy gradient becomes a correspondingly flat carbon gradient in this case realized.
  • This transition zone between higher and lower carbon Layers extends with a wall thickness of the components of less than 4 mm over less than 20%, preferably less than 15% of the wall thickness.
  • the range of the flat alloy or carbon gradient is wider than 0.1 mm, i.e. more than an order of magnitude wider than the known one Walzplattiermaschine.
  • the strength and / or hardness properties can be influenced Layers the edge layers of the components, which are hard as a surface are and get a hardness curve, which is roughly the case hardening equals.
  • the disadvantage of case hardening is that due to the long residence time A relatively coarse grain structure occurs in the marginal zones, which leads to an increased Micro-crack sensitivity is caused by the layer arrangement according to the invention however avoided.
  • the Edge layers also have a wear-resistant fine grain structure with high toughness the edge zone, which leads to a particularly low sensitivity to microcracks.
  • components with a wall thickness can be made using the method according to the invention less than 4 mm.
  • the strength of the wall thickness and / or hardness properties of influenceable layers i.e. the martensitic hardened layers, a cross-sectional proportion of about 10% to 50%.
  • the core layer of the components in their strength and / or hardness properties be influenced, for example hardened, while the outer layers Steel alloys which cannot be influenced in their strength and / or hardness properties or stainless steels.
  • the layers which can be influenced in their strength and / or hardness properties Materials such as C 55, C 67 or other steels from EN, 100 Cr 6 or X 20 Cr13, X 35 CrMo 17 advantageously form the boundary layers, while the core layers cannot be influenced in their strength and / or hardness properties Materials such as DC 01 or C 10 exist.
  • layers also form the core layers, for example one Spring steel core made of C 60, C 67 or C 75, while the outer layers made of easily deformable Steels such as C 10 or DC 01, or also made of rust-resistant Steels like X 5 CrNi 1810.
  • the alloy gradient according to the invention between the surface and core layers can be produced in that for the production of the composite material for the Edge layers Boards made of martensitic hardenable steel parallel and spaced apart be arranged and the core layer between them with molten, low-carbon steel is cast.
  • the Surface layers become, for example, cold or surface treated hot strip used with predetermined chemical analysis, especially high carbon content. Due to the molten core material cast in between, the has a lower carbon content, local melting occurs of the boards at the material interfaces, which is due to diffusion processes a flat alloy or carbon gradient, with a depth of about 0.1 - 0.3 mm. These properties are due to the invention Connection by means of a casting process close to the final dimensions.
  • the boards are preferably at the casting wheels or the casting mold Pouring the molten core material cooled from the outside. This can even with thin blanks, the width of the alloy gradient can be controlled that it is in the range of 0.1 mm and thereby up to 10% of the total cross section is.
  • the blanks as strip steel at the edge of the casting gap be fed to a continuously operating casting plant.
  • the casting plant can be a continuous casting plant with a fixed continuous mold or for Carrying out a continuous casting and rolling process with the casting gap delimiting rotating rollers (casting wheels).
  • the Tapes are bare, scale and oxide free due to the appropriate surface treatment as well as roughened if necessary.
  • a protective glass bell is generated by supplying inert gases or inert gas mixtures.
  • the aforementioned casting is preferably followed by a hot rolling process. Due to the prevailing temperatures of above 950 ° C due to the high surface pressure and deformation ensures that complete welding of the layers safely achieved in the manner desired according to the invention will, even if the metallic joining when the Melt with the belt surface should not have been sufficient. It forms then at the latest a flat material transition gradient between the layers which is in the 0.1 mm range.
  • the surface of the rolling stock receives one Condition poor in rolling scars and scales without flaming or finishing operations.
  • the composite material is then rolled by hot and / or cold rolling Rolling degree of regularly more than 30% rolled to a thickness of 1 to 5 mm.
  • the final, preferably cold rolling true-to-shape design to the wall thickness of the components, which range up to 4.0 mm, with the surface having the smallest depths of defects and high freedom from pores has what the prerequisite for later use for highly stressed Components, for example machine components. If necessary, the final Shaping multiple cold rolling and intermediate annealing may be required.
  • the is on Dimensionally rolled composite material preferably a recrystallization or soft annealing subjected to about 730 ° C. In this soft annealed condition is suitable the composite material is good for cold forming, for example of machine components.
  • the composite molded material is used to influence its Strength and / or hardness properties subjected to a heat treatment at which results in a martensitic hardening of the hardenable layers.
  • a heat treatment at which results in a martensitic hardening of the hardenable layers.
  • partial heat treatment for example by means of laser or electron radiation, can have a locally limited influence on the strength and / or Hardness properties, that is, hardening take place.
  • an influencing the strength and / or hardness properties take place in the short-term continuous process, preferably in a protective gas oven. This enables a particularly rational Production of functionally optimized strip material and components.
  • a particularly advantageous application has one according to the aforementioned Process-manufactured, thin-walled steel component with a soft core layer and martensitic hardened surface layers, which consists of a cold-formed, hardened multi-layer composite material, which is carbon-rich, martensitic hardened surface layers and a relatively lower-carbon core layer The carbon gradient between the layers is flat.
  • This component according to the invention is characterized in that it is The hardness curve and distribution of strength come close to a case-hardened steel component.
  • martensitic curable layers can have material properties which cannot be achieved with other hardening processes are.
  • the component also boundary layers which cannot be influenced in their strength and / or hardness properties, for example made of stainless steel alloys, and a tempered core layer have, for example made of spring steel.
  • the wall thickness of the component according to the invention is preferably up to 4.0 mm.
  • the carbon gradient in the transition area extends over approximately 10 up to 30% of the wall thickness, in any case over 0.1 mm.
  • the materials for the outer and core layers are preferably one on the other matched that the hardness of the core layer at least 30% to 50% of the hardness corresponds to the boundary layers.
  • the component can consist of two different materials, for example from a low-alloy core layer and high-alloy outer layers.
  • the chemical composition of the outer layers can, however, if necessary also be different, so that a total of at least three layers with different Material properties are present. This allows one more achieve improved functional optimization of the components, such as corrosion protection or fusion weldability.
  • asymmetrical components can be made in components manufactured according to the invention Realize spring travel or self-adjusting spring travel or forces.
  • Fig. 1 shows a section through a cold-formed, martensitic surface layer hardened Component 1. This is preferably made of strip material with a total thickness of 5 formed, which is in the range of 0.3 to 4.0 mm.
  • the component shown consists of steel layer material with several layers. These include in particular a core area B made of low carbon alloy and outer layers A made of carbon-rich, martensitic hardened steel.
  • the Core layer B consists for example of Ck10, DC01, C 10, C 35 or C 53.
  • Die outer edge layers consist, for example, of Ck67, C 55, C 67, or also 102 Cr6, x5 Cr Ni 1810 or the like.
  • the boundary layers A can in turn also consist of steel alloys with different analyzes.
  • the peculiarity of the component 1 shown is that the layers A, B, A even before cold forming to the final dimension 5 according to the invention Processes have been interconnected so that wide at the layer boundaries Transition zones G have been formed, which are indicated by hatching and in which a flat surface is formed by carbon diffusion between the layer materials Has formed a carbon gradient that is in the range of several 1/10 mm.
  • the entire component 1 (FIG. 1) is, after which it becomes, for example, a machine component has been cold formed, subjected to a martensitic hardening process Service.
  • the outer layers A are hardened, while the core B is a relative one maintains great toughness.
  • the flat carbon gradient according to the invention G there is a flat voltage curve at the layer boundaries, so that there is no danger chipping of the outer layers A from the core layer B is like this for example in the case of the roll-clad strip according to the prior art is.
  • the component 1 according to the invention as shown in FIG Core layer B which is hardened in particular martensitic or bainitic, and relative have not or less tempered outer layers, whereby it consists of a cold-formed, in its strength and / or hardness properties influenceable multilayer composite consists of a carbon-rich, in their strength and / or Core layer B which can be influenced by hardness properties and relatively low-carbon in relation thereto
  • Has boundary layers A the zone of the carbon gradient G, such as explained above, runs flat between the layers A, B.
  • a spring steel that can be influenced in its strength and / or hardness properties in the core and low corrosion for example stainless alloys in the Edge layers A conceivable. This allows, for example, an asymmetrical suspension travel or specify a self-adjusting spring force.
  • Fig. 2 shows schematically a continuously operating two-roll casting and rolling system. This has two rotating, water-cooled copper rollers 2, which have a casting gap Limit from 1 - 5 mm wide. From above, the melt sump 3 is over Dip tube 4 charged with molten material B. Along the edges of the Casting nip is fed from strip material A from supply coils. With the one in the casting gap encapsulated core material B is there the connection between the as a steel hot band supplied material A and the molten material B instead. Due to the high surface pressure at temperatures above 950 ° C in hot rolling there is definitely an optimal metallic joining.
  • the heat dissipation via the copper rollers 2 ensures that Steel warmer A through that the carbon gradient G is the steel warmer A does not penetrate too far. In any case, it remains sufficiently thick Boundary layer of the carbon-rich, martensitic hardenable boundary material A is present, around components in the subsequent heat treatment and hardening processes with the hardness curve shown or the strength distribution.
  • steel layer materials can be with extremely different properties in terms of strength and / or hardness properties of the individual layers.
  • the cold-formable composite can be processed particularly well and efficiently to final dimensions. in the Contrary to the known methods, neither occurs during the subsequent hardening to a disadvantageous delay in hardness, there is still the risk of flaking off Surface layers. This is because they have a fine, tough structure, which not to break the component even under high loads or short-term overload leads.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Steel (AREA)
  • Forging (AREA)
  • Powder Metallurgy (AREA)

Claims (29)

  1. Procédé de fabrication de pièces à parois minces en acier qui présentent une couche intérieure formant âme et des couches extérieures formant peau, les couches formant âme et formant peau étant constituées de différents alliages d'acier et étant assemblées, dans un procédé de coulage, en un matériau composite présentant aux interfaces un gradient d'alliage évoluant de manière constante, et le matériau composite étant formé à la dimension des pièces à parois minces et traité thermiquement, et le traitement thermique conduisant à des duretés martensitiques et ou bainitiques non pas de l'ensemble, mais toutefois d'au moins l'une des couches.
  2. Procédé selon la revendication 1, caractérisé en ce que la (les) couche(s) durcie(s) est(sont) constituée(s) d'acier plus fortement allié que la (les) couche(s) inchangée(s) dans ses (leurs) caractéristiques de résistance et/ou de dureté.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que les couches formant âme ou formant peau comprennent des couches durcies et résistantes à la corrosion.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que les couches durcies constituent les couches formant peau.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les couches durcies ont une structure à granularité fine résistant à l'usure, présentant une ténacité élevée et une sensibilité minime aux microfissures.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que les couches durcies constituent les couches formant âme.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que les pièces ont une épaisseur de paroi inférieure à 4 mm.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que les couches durcies représentent en coupe transversale une proportion de 10 à 50 % de l'épaisseur de paroi.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la zone du gradient d'alliage a une largeur supérieure à 0,1 mm.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que le gradient d'alliage s'étend sur environ 10 à 25 % de l'épaisseur de paroi.
  11. Procédé selon l'une des revendications 1 à 10, caractérisé en ce que pour la fabrication du matériau composite, des plaques en acier capables de subir un durcissement martensitique ou bainitique sont disposées parallèlement à distance les unes des autres et la couche formant âme située entre celles-ci est coulée en acier en fusion, moins riche en carbone.
  12. Procédé selon la revendication 11, caractérisé en ce que les plaques sont refroidies de l'extérieur.
  13. Procédé selon la revendication 12 ou 13, caractérisé en ce que les plaques sont amenées, sous forme de ruban d'acier, au bord de la fente de coulage d'une installation de coulage travaillant en continu.
  14. Procédé selon la revendication 13, caractérisé en ce que l'installation de coulage continu présente une lingotière de coulage continu, statique.
  15. Procédé selon la revendication 13, caractérisé en ce que l'installation de coulage présente des rouleaux refroidis, rotatifs, qui délimitent la fente de coulage.
  16. Procédé selon la revendication 1 à 15, caractérisé en ce que le formage du matériau composite s'opère par laminage à chaud.
  17. Procédé selon l'une des revendications 1 à 15, caractérisé en ce que le formage du matériau composite s'opère par laminage à froid.
  18. Procédé selon l'une des revendications 1 à 17, caractérisé en ce que le matériau composite formé à la dimension des pièces subit un recuit d'adoucissement et ensuite formé en pièces.
  19. Procédé selon l'une des revendications 1 à 18, caractérisé en ce que le durcissement s'opère par un traitement thermique court.
  20. Procédé selon l'une des revendications 1 à 19, caractérisé en ce que le matériau composite formé à la dimension finale est soumis à un traitement thermique en vue du durcissement martensitique ou bainitique des couches durcies.
  21. Procédé selon l'une des revendications 1 à 20, caractérisé en ce qu'il s'opère un durcissement localement limité des couches durcies.
  22. Procédé selon l'une des revendications 1 à 21, caractérisé en ce que le durcissement martensitique ou bainitique des couches s'opère par procédé en continu.
  23. Pièce en acier à parois minces, réalisée suivant le procédé selon l'une ou plusieurs des revendications 1 à 22, caractérisée en ce qu'elle est constituée d'un matériau composite multicouche formé à froid, qui présente des couches formant peau durcies et une couche formant âme non durcie.
  24. Pièce à parois minces selon la revendication 23, caractérisée en ce que les couches formant peau ayant subi un durcissement martensitique ou bainitique sont riches en carbone et que par comparaison à celles-ci la couche formant âme est relativement moins riche en carbone, le gradient de carbone entre les couches étant constant.
  25. Pièce en acier à parois minces, réalisée suivant le procédé selon l'une ou plusieurs des revendications 1 à 22, caractérisée en ce qu'elle est constituée d'un matériau composite multicouche formé à froid, qui présente des couches formant peau non durcies et une couche formant âme durcie.
  26. Pièce selon l'une des revendications 23 à 25, caractérisée en ce que l'épaisseur de paroi de la pièce est inférieure à 4 mm.
  27. Pièce selon l'une des revendications 23 à 26, caractérisée en ce que le gradient de carbone s'étend sur au maximum 10 % à 30 % de l'épaisseur de paroi de la pièce.
  28. Pièce selon l'une des revendications 23 à 27, caractérisée en ce que le gradient de carbone s'étend sur plus de 0,1 mm.
  29. Pièce selon l'une des revendications 23 à 28, caractérisée en ce qu'elle présente dans la zone marginale une structure à granularité fine résistant à l'usure, présentant une ténacité élevée et une sensibilité minime aux microfissures.
EP01900129A 2000-03-13 2001-01-05 Procede pour produire des pieces en acier a faible epaisseur de paroi, et pieces ainsi produites Expired - Lifetime EP1263540B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10011758A DE10011758C2 (de) 2000-03-13 2000-03-13 Verfahren zur Herstellung von dünnwandigen Bauteilen aus Stahl und danach hergestellte Bauteile
DE10011758 2000-03-13
PCT/EP2001/000088 WO2001068293A1 (fr) 2000-03-13 2001-01-05 Procede pour produire des pieces en acier a faible epaisseur de paroi, et pieces ainsi produites

Publications (2)

Publication Number Publication Date
EP1263540A1 EP1263540A1 (fr) 2002-12-11
EP1263540B1 true EP1263540B1 (fr) 2004-06-30

Family

ID=7634263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01900129A Expired - Lifetime EP1263540B1 (fr) 2000-03-13 2001-01-05 Procede pour produire des pieces en acier a faible epaisseur de paroi, et pieces ainsi produites

Country Status (13)

Country Link
US (1) US6953627B2 (fr)
EP (1) EP1263540B1 (fr)
AT (1) ATE270163T1 (fr)
AU (1) AU2372701A (fr)
BR (1) BR0109190B1 (fr)
CA (1) CA2404361C (fr)
CZ (1) CZ303019B6 (fr)
DE (2) DE10011758C2 (fr)
ES (1) ES2223770T3 (fr)
HU (1) HU225711B1 (fr)
MX (1) MXPA02008871A (fr)
SK (1) SK286356B6 (fr)
WO (1) WO2001068293A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12031613B2 (en) 2019-05-28 2024-07-09 Schaeffler Technologies AG & Co. KG Profiled nut of a screw drive, in particular a ball screw nut of a ball screw drive, and method for the production thereof

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10202212B4 (de) * 2002-01-18 2004-02-26 Thyssenkrupp Stahl Ag Verfahren zum Erzeugen von aus metallischem Verbundwerkstoff bestehendem Band oder Blech
DE102005006606B3 (de) * 2005-02-11 2006-03-16 Thyssenkrupp Steel Ag Verfahren zum Herstellen von walzplattiertem Warmband zur Weiterverarbeitung zu Kaltband und gewickeltes Coil aus solchem Warmband
DE102006019567B3 (de) * 2006-04-27 2007-11-08 Daimlerchrysler Ag Verfahren zum Herstellen umgeformter Stahlbauteile
DE102007022453B4 (de) * 2007-05-10 2020-02-06 Thyssenkrupp Steel Europe Ag Mehrschichtiges Verbundteil und aus diesem hergestelltes Bauteil
DE102008018204A1 (de) 2008-02-04 2009-08-06 Wickeder Westfalenstahl Gmbh Verbundwerkstoff und Verfahren zur Herstellung eines Verbundwerkstoffs
DE102008008113A1 (de) * 2008-02-08 2009-08-13 Schaeffler Kg Nichtmagnetisierbares Wälzlagerbauteil aus einem austenitischen Werkstoff und Verfahren zur Herstellung eines derartigen Wälzlagerbauteils
DE102008022709A1 (de) 2008-05-07 2009-11-19 Thyssenkrupp Steel Ag Verwendung eines metallischen Verbundwerkstoffs in einer Fahrzeugstruktur
PL2123447T3 (pl) * 2008-05-07 2019-05-31 Thyssenkrupp Steel Europe Ag Tworzywo kompozytowe z efektem ochrony balistycznej
US20100330389A1 (en) * 2009-06-25 2010-12-30 Ford Motor Company Skin pass for cladding thin metal sheets
DE102011106222A1 (de) * 2011-06-07 2012-12-13 Rwe Power Ag Dampferzeugerbauteil sowie Verfahren zur Herstellung eines Dampferzeugerbauteil
DE102013106570A1 (de) * 2013-06-24 2014-12-24 Thyssenkrupp Resource Technologies Gmbh Siebstange, Stangensieb und Verfahren zur Herstellung einer Siebstange
DE102013017798A1 (de) * 2013-10-25 2015-04-30 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Verbundstahlblech
DE102014116949A1 (de) * 2014-11-19 2016-05-19 Thyssenkrupp Ag Verfahren zur Herstellung eines Verbundwerkstoffes
CN109996637A (zh) 2016-11-18 2019-07-09 Sms集团有限公司 用于制造连续的带状复合材料的方法以及设备
JP7550767B2 (ja) * 2019-01-23 2024-09-13 バード スティール，インコーポレイテッド 内部勾配材料、道具、および方法
KR20230036983A (ko) * 2021-09-08 2023-03-15 고오슈우하네쓰렌 가부시기가이샤 강재접합체 및 그 제조 방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1435936A (fr) * 1965-03-08 1966-04-22 Siderurgie Fse Inst Rech Procédé et dispositif de coulée continue de produits liquides
FR1495365A (fr) * 1965-10-01 1967-12-20
DE3346391C2 (de) * 1983-12-22 1985-11-21 Mannesmann AG, 4000 Düsseldorf Stranggießverfahren und Vorrichtung zum Herstellen von Mehrschichtwerkstoffen
DE4137118A1 (de) * 1991-11-12 1993-05-13 Schaeffler Waelzlager Kg Kaltband zur herstellung praezisions-tiefgezogener, einsatzgehaerteter bauteile, insbesondere waelzlager- und motorenteile
DE19631999A1 (de) * 1996-08-08 1998-02-12 Schloemann Siemag Ag Stranggießverfahren zur Herstellung von Verbundblechen sowie Stranggießanlage
DE19731124C1 (de) * 1997-07-19 1999-01-21 Schloemann Siemag Ag Verfahren und Vorrichtung zur Erzeugung von beschichtetem Warm- und Kaltband
DE19850213C2 (de) * 1998-01-23 2001-08-30 Sms Demag Ag Gießverfahren für ein dünnes Metallband und zugehörige Gießvorrichtung
DE19815007C2 (de) * 1998-01-23 2000-07-06 Sms Demag Ag Gießverfahren für einen Metallstrang

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12031613B2 (en) 2019-05-28 2024-07-09 Schaeffler Technologies AG & Co. KG Profiled nut of a screw drive, in particular a ball screw nut of a ball screw drive, and method for the production thereof

Also Published As

Publication number Publication date
BR0109190A (pt) 2003-05-27
EP1263540A1 (fr) 2002-12-11
DE10011758A1 (de) 2001-09-27
CA2404361C (fr) 2007-03-06
HUP0300086A2 (en) 2003-04-28
BR0109190B1 (pt) 2011-04-05
ATE270163T1 (de) 2004-07-15
SK286356B6 (sk) 2008-08-05
CZ303019B6 (cs) 2012-02-29
CZ20023038A3 (cs) 2003-06-18
ES2223770T3 (es) 2005-03-01
WO2001068293A1 (fr) 2001-09-20
HU225711B1 (en) 2007-06-28
US6953627B2 (en) 2005-10-11
DE50102738D1 (de) 2004-08-05
CA2404361A1 (fr) 2001-09-20
DE10011758C2 (de) 2003-10-16
MXPA02008871A (es) 2004-10-14
SK13272002A3 (sk) 2003-07-01
US20030029530A1 (en) 2003-02-13
AU2372701A (en) 2001-09-24

Similar Documents

Publication Publication Date Title
EP2547800B1 (fr) Procédé de fabrication de pièces en acier léger de construction ayant des propriétés de matériau ajustables suivant l'épaisseur de paroi
EP1263540B1 (fr) Procede pour produire des pieces en acier a faible epaisseur de paroi, et pieces ainsi produites
EP2473297B1 (fr) Procédé et dispositif pour produire un composant métallique et utilisation d'un tel composant métallique
EP2446064B1 (fr) Procédé de fabrication d'une pièce trempée à chaud sous presse et utilisation d'un produit en acier pour la fabrication d'une pièce trempée à chaud sous presse
EP3265365B1 (fr) Pièce profilée en tôle trempée à la presse ayant différentes épaisseurs et rigidités
DE3825634C2 (de) Verfahren zur Erzeugung von Warmbad oder Grobblechen
EP0580062A1 (fr) Procédé pour la fabrication des plaques de blindage épaisses
DE4019845C2 (de) Verfahren zur Herstellung einer Arbeitswalze für ein Metallwalzwerk
WO2018234102A1 (fr) Procédé de fabrication d'un composant en acier pourvu d'un revêtement métallique anticorrosion
DE3919199C2 (fr)
EP1274872B1 (fr) Procede de production d'un acier allie a l'azote, compacte par pulverisation
DE69203228T2 (de) Metalldraht aus einem stahlsubstrat mit kaltgehärteter geglühter martensitischer struktur und beschichtung.
DE3236268C2 (de) Verschleißfeste Gußeisenlegierung
EP2414552B1 (fr) Pivots à rotule en aciers à structure bainitique pour de véhicules à usage personnel et de véhicules utilitaires légers
DE10161465C1 (de) Verfahren zum Herstellen von Warmband
EP3827103B1 (fr) Procédé pour la fabrication d'un produit en acier durci
EP0074347A2 (fr) Procédé pour la fabrication de vis de transport
EP4043115B1 (fr) Procédé de formage d'une pièce en tôle trempée à la presse comportant des zones ayant des propriétés différentes
DE1814112A1 (de) Verfahren zur Herstellung aufgeschweisster Walzen fuer Walzwerke zur Verformung von Metallen
DE2810186C2 (de) Arbeitswalze zum Warmwalzen von Nichteisenmetallen und Verfahren zur Herstellung des Walzenmantels einer solchen Arbeitswalze
WO1997036112A1 (fr) Materiau composite stratifie et procede permettant d'ameliorer la durete superficielle de materiaux composites stratifies
WO2008006346A2 (fr) Procédé de fabrication d'un demi-produit en tôle adapté pour le formage à chaud
DE102019115165A1 (de) Verfahren zum Erzeugen eines Stahlverbundwerkstoffs
DE102018220222A1 (de) Verfahren zur Herstellung eines Werkstoffverbundes, Werkstoffverbund und seine Verwendung
DE102006052834A1 (de) Verfahren zum Herstellen eines Wälzlagerringes und Wälzlagerring

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: 20020913

AK Designated contracting states

Kind code of ref document: A1

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

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI PAYMENT 20020913

17Q First examination report despatched

Effective date: 20030416

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

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 CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: SI

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: 20040630

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: 20040630

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: 20040630

Ref country code: NL

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: 20040630

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

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: GERMAN

REF Corresponds to:

Ref document number: 50102738

Country of ref document: DE

Date of ref document: 20040805

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

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

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: 20040930

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: 20040930

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: C.D. WAELZHOLZ-BROCKHAUS GMBH

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20040630

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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: 20050105

Ref country code: LU

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

Effective date: 20050105

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: 20050105

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: 20050131

Ref country code: BE

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

Effective date: 20050131

Ref country code: CH

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

Effective date: 20050131

Ref country code: MC

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

Effective date: 20050131

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2223770

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

ET Fr: translation filed
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

26N No opposition filed

Effective date: 20050331

BERE Be: lapsed

Owner name: C.D. *WALZHOLZ PRODUKTIONS-G.M.B.H.

Effective date: 20050131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

BERE Be: lapsed

Owner name: C.D. *WALZHOLZ PRODUKTIONS-G.M.B.H.

Effective date: 20050131

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

Ref country code: PT

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

Effective date: 20041130

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20091201

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

Ref country code: SE

Payment date: 20120124

Year of fee payment: 12

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

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 NON-PAYMENT OF DUE FEES

Effective date: 20130106

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

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

Ref country code: FR

Payment date: 20181129

Year of fee payment: 19

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

Ref country code: ES

Payment date: 20190208

Year of fee payment: 19

Ref country code: GB

Payment date: 20190118

Year of fee payment: 19

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

Ref country code: AT

Payment date: 20181219

Year of fee payment: 19

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

Ref country code: IT

Payment date: 20200130

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50102738

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 270163

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200105

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

Effective date: 20200105

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: 20200105

Ref country code: DE

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

Effective date: 20200801

Ref country code: FR

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

Effective date: 20200131

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

Ref country code: AT

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

Effective date: 20200105

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20210602

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 NON-PAYMENT OF DUE FEES

Effective date: 20200106