DE10044067A1 - Making wear- and heat- resistant, diffusion-inhibiting surface layer for ferrous metals, especially for use in casting, coats and anodizes aluminum layer - Google Patents

Making wear- and heat- resistant, diffusion-inhibiting surface layer for ferrous metals, especially for use in casting, coats and anodizes aluminum layer

Info

Publication number
DE10044067A1
DE10044067A1 DE2000144067 DE10044067A DE10044067A1 DE 10044067 A1 DE10044067 A1 DE 10044067A1 DE 2000144067 DE2000144067 DE 2000144067 DE 10044067 A DE10044067 A DE 10044067A DE 10044067 A1 DE10044067 A1 DE 10044067A1
Authority
DE
Germany
Prior art keywords
layer
aluminum layer
aluminum
resistant
diffusion
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.)
Withdrawn
Application number
DE2000144067
Other languages
German (de)
Inventor
Dirk Eichel
Michael Kopp
Karl Goelder
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt GmbH
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 KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Priority to DE2000144067 priority Critical patent/DE10044067A1/en
Publication of DE10044067A1 publication Critical patent/DE10044067A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2209—Selection of die materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00

Abstract

An aluminum layer is coated onto the ferrous metal, forming an intermetallic phase of composition FexAly. By anodic oxidation, an anodized layer of composition Al2O3 is produced.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer verschleißfesten, thermisch beständigen, diffusionshemmenden Oberflächenschicht für Eisenmetalle.The invention relates to a method for producing a wear-resistant, thermally resistant, diffusion-inhibiting Surface layer for ferrous metals.

Bei Gießprozessen kommt es z. B. bei einem Aufeinandertreffen von flüssigem Aluminium und einem Eisenmetall zu einem Diffusionsvorgang, welcher zum Verschleiß des festen Eisenmetalls führt. In der Gießform können dadurch Abweichungen im Maß entstehen, welche Nachbesserungen in kurzen Zeitabständen notwendig machen.In casting processes, it happens e.g. B. at a meeting from liquid aluminum and a ferrous metal to one Diffusion process, which leads to wear of the solid Leads ferrous metal. This can be done in the mold  Deviations in dimensions arise, which improvements in make short intervals necessary.

Um dieses Problem zu vermeiden, wurden die Gießformen bisher direkt gehärtet, lackiert oder beschichtet. Beispielsweise wurden Beschichtungen mit C bzw. CrC verwendet. Alternativ wurde auch das Verfahren des Plasmaspritzens bzw. Flammspritzens verwandt.To avoid this problem, the molds have been used up to now directly hardened, painted or coated. For example coatings with C or CrC were used. alternative was the process of plasma spraying or Flame spraying related.

Es ist Aufgabe der Erfindung, ein alternatives Verfahren zur Herstellung einer verschleißfesten, thermisch beständigen, diffusionshemmenden Oberflächenschicht für Eisenmetalle bereitzustellen, die gleichzeitig eine höhere Standzeit bei Gießwerkzeugen sowie eine, verbesserte Maßhaltigkeit gewährleistet.It is an object of the invention to provide an alternative method for Manufacture of a wear-resistant, thermally resistant, diffusion-inhibiting surface layer for ferrous metals to provide that at the same time a longer service life Casting tools and an, improved dimensional accuracy guaranteed.

Die Aufgabe wird durch ein Verfahren gelöst, bei dem zunächst eine Aluminiumschicht auf das Eisenmetall aufgetragen wird und das Aluminium der Aluminiumschicht mit dem Eisen des Eisenmetalls eine intermetallische Phase mit der Zusammensetzung FexAly bildet, wobei anschließend durch anodische Oxidation eine Eloxalschicht mit der Zusammensetzung Al2O3 erzeugt wird.The object is achieved by a process in which an aluminum layer is first applied to the ferrous metal and the aluminum of the aluminum layer with the iron of the ferrous metal forms an intermetallic phase with the composition Fe x Al y , and then anodic oxidation with an anodized layer with the composition Al 2 O 3 is generated.

Beispielsweise durch Alfinieren als ersten Verfahrensschritt wird das zu behandelnde Werkstück mit einer Aluminiumschicht überzogen. Diese Aluminiumschicht wird dann in einem zweiten Verfahrensschritt mittels anodischer Oxidation in eine Eloxalschicht umgewandelt.For example, by refining as the first process step the workpiece to be treated with an aluminum layer overdrawn. This aluminum layer is then in a second  Process step by means of anodic oxidation in a Anodized layer converted.

Durch die hohe Härte und Temperaturbeständigkeit der Eloxalschicht, die bis zu 2060°C reicht, erhält man zum einen einen besseren Verschleißschutz, zum anderen jedoch auch einen Schutz vor Oxidation sowie einen Schutz vor chemischen Reaktionen, Säuren und Basen.Due to the high hardness and temperature resistance of the On the one hand you get an anodized coating that reaches up to 2060 ° C better wear protection, but also one Protection against oxidation as well as protection against chemical Reactions, acids and bases.

Diese Vorteile führen zu höheren Standzeiten der Gießwerkzeuge sowie zu einer verbesserten Maßhaltigkeit, da kein weiterer Diffusionsprozeß des festen Eisens der Gießform mit dem zu vergießenden Werkstoff mehr stattfindet.These advantages lead to longer tool life as well as an improved dimensional accuracy, since no other Diffusion process of the solid iron of the mold with that shedding material takes place more.

Es kann insbesondere vorgesehen sein, daß die Aluminiumschicht durch Alfinieren auf das Eisenmetallwerkstück aufgebracht wird. Alternativ kann das Aufbringen jedoch auch mittels Plasmaspritzen, Schweißen, Hartlöten oder elektro-chemisch erfolgen.In particular, it can be provided that the aluminum layer applied to the ferrous metal workpiece by finishing becomes. Alternatively, the application can also be carried out by means of Plasma spraying, welding, brazing or electro-chemical respectively.

Es kann weiter vorgesehen sein, daß das Eisenmetall zum Aufbringen der Aluminiumschicht erhitzt oder gekühlt wird.It can further be provided that the ferrous metal for Application of the aluminum layer is heated or cooled.

Das Aluminium der Aluminiumschicht kann während des Alfinierens bzw. einer anderen Beschichtungsmethode in das Eisen hineindiffundieren und bildet aufgrund dieses Diffusionsvorgangs eine intermetallische Verbindung.The aluminum of the aluminum layer can during the Alfinieren or another coating method in the Diffuse iron into it and forms on account of this Diffusion process an intermetallic compound.

Claims (5)

1. Verfahren zur Herstellung einer verschleißfesten, thermisch beständigen, diffusionshemmenden Oberflächenschicht für Eisenmetalle, dadurch gekennzeichnet, daß zunächst eine Aluminiumschicht auf das Eisenmetall aufgetragen wird und das Aluminium der Aluminiumschicht mit dem Eisen des Eisenmetalls eine intermetallische Phase mit der Zusammensetzung FexAly bildet, wobei anschließend durch anodische Oxidation eine Eloxalschicht mit der Zusammensetzung Al2O3 erzeugt wird.1. A process for producing a wear-resistant, thermally resistant, diffusion-inhibiting surface layer for ferrous metals, characterized in that first an aluminum layer is applied to the ferrous metal and the aluminum of the aluminum layer with the iron of the ferrous metal forms an intermetallic phase with the composition Fe x Al y , an anodic oxidation subsequently producing an anodized layer with the composition Al 2 O 3 . 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Aufbringen der Aluminiumschicht durch Alfinieren, Plasmaspritzen, Schweißen, Hartlöten oder elektro-chemisch erfolgt.2. The method according to claim 1, characterized in that that the application of the aluminum layer by Alfining, plasma spraying, welding, brazing or electro-chemically. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Eisenmetall zum Aufbringen der Aluminiumschicht erhitzt oder gekühlt wird.3. The method according to claim 1 or 2, characterized characterized in that the ferrous metal for application the aluminum layer is heated or cooled. 4. Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Aluminium der Aluminiumschicht in das Eisen hineindiffundiert. 4. Method according to one or more of the preceding Claims, characterized in that the aluminum the aluminum layer diffuses into the iron.   5. Verfahren nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Eloxalschicht einfärbbar ist.5. Method according to one or more of the preceding Claims, characterized in that the Anodized layer can be colored.
DE2000144067 2000-09-07 2000-09-07 Making wear- and heat- resistant, diffusion-inhibiting surface layer for ferrous metals, especially for use in casting, coats and anodizes aluminum layer Withdrawn DE10044067A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2000144067 DE10044067A1 (en) 2000-09-07 2000-09-07 Making wear- and heat- resistant, diffusion-inhibiting surface layer for ferrous metals, especially for use in casting, coats and anodizes aluminum layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000144067 DE10044067A1 (en) 2000-09-07 2000-09-07 Making wear- and heat- resistant, diffusion-inhibiting surface layer for ferrous metals, especially for use in casting, coats and anodizes aluminum layer

Publications (1)

Publication Number Publication Date
DE10044067A1 true DE10044067A1 (en) 2002-04-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE2000144067 Withdrawn DE10044067A1 (en) 2000-09-07 2000-09-07 Making wear- and heat- resistant, diffusion-inhibiting surface layer for ferrous metals, especially for use in casting, coats and anodizes aluminum layer

Country Status (1)

Country Link
DE (1) DE10044067A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008011A1 (en) * 2007-02-15 2008-08-21 Rolls-Royce Deutschland Ltd & Co Kg Process for forming an aluminum diffusion layer for oxidation protection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008011A1 (en) * 2007-02-15 2008-08-21 Rolls-Royce Deutschland Ltd & Co Kg Process for forming an aluminum diffusion layer for oxidation protection

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Ipc: C23F 17/00

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