EP0083043B1 - Pièce d'usure - Google Patents

Pièce d'usure Download PDF

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Publication number
EP0083043B1
EP0083043B1 EP82111762A EP82111762A EP0083043B1 EP 0083043 B1 EP0083043 B1 EP 0083043B1 EP 82111762 A EP82111762 A EP 82111762A EP 82111762 A EP82111762 A EP 82111762A EP 0083043 B1 EP0083043 B1 EP 0083043B1
Authority
EP
European Patent Office
Prior art keywords
layer
layers
range
titanium
wearing part
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
Application number
EP82111762A
Other languages
German (de)
English (en)
Other versions
EP0083043A1 (fr
Inventor
Wilfried Dr. Schintlmeister
Wolfgang Wallgram
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.)
Metallwerk Plansee GmbH
Original Assignee
Metallwerk Plansee 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 Metallwerk Plansee GmbH filed Critical Metallwerk Plansee GmbH
Publication of EP0083043A1 publication Critical patent/EP0083043A1/fr
Application granted granted Critical
Publication of EP0083043B1 publication Critical patent/EP0083043B1/fr
Expired 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates

Definitions

  • the invention relates to a wearing part, in particular a hard metal cutting insert for machining, with a multilayer hard material coating, at least one layer being embodied as an oxide layer.
  • Such a wear part is known from DE-AS 2253745, the inner layer of the carbide base body which is initially located and consists of one or more carbides and / or nitrides of the elements Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Si and / or B and the outer layer of which consists of one or more extremely wear-resistant deposits made of aluminum oxide and / or zirconium oxide.
  • a disadvantage of this wearing part is that cracks can occur in the pure oxide top layers and that in many cases the oxide layers have insufficient adhesive strength and flake off.
  • the brittleness of the oxide layer increases rapidly with increasing layer thickness.
  • the structure changes very disadvantageously, so that in practice such wear parts are limited to the use of a comparatively very thin layer of a few micrometers or a thicker layer does not bring any additional advantages. This in turn limits the service life of wearing parts, e.g. from indexable inserts to machining, crucial.
  • DE-OS 2317447 which represents an additional application to the aforementioned E-AS 2253745, describes a wearing part, the outer cover layer of which consists of one or more deposits of ceramic oxides, the oxides of the elements Si in particular being in addition to the oxides mentioned in the main patent , B, Ca, Mg, Ti and / or Hf are listed and the formation of mixed oxides is generally included in the application. Individual mixed oxides are not particularly emphasized.
  • DE-AS 2851584 discloses a composite body, preferably with a hard metal base body, in which on the base body one or more layers of one or more carbides and / or nitrides of the elements Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Si, B and on this layer or layers one or more layers of a mixture of at least one oxide and at least one nitride and / or of at least one oxynitride of the elements Cr, Al, Ca, Mg, Th , Sc, Y, La, Ti, Hf, V, Nb, Ta are arranged, the nitrogen content of the outermost layer being 0.1 to 30 atom%, preferably 0.2 to 15 atom%.
  • the only example describes the following layer structure on hard metal: TiC, 4 Jl m + Al 2 O 2.8 N 0.2 , 2-3 Jlm.
  • carbide wear parts in particular have been known, in which the outer layer consists of a large number of layers of alternating Ti (C, N) and Al 2 (O, N), this embodiment also being within the scope of protection of DE-AS 2917348 falls.
  • the object on which the invention is based is to create a wearing part, in particular a hard metal cutting insert for machining with a multi-layer hard material coating, at least one layer being designed as an oxide layer, which has improved wear resistance and improved wear resistance compared to known wearing parts Has adhesive strength of the hard material coating.
  • the wearing part according to the invention has a significantly increased wear resistance as well as an excellent adhesive strength of the hard material coating compared to known multi-layer coated wearing parts, so that there is a considerably longer service life of the wearing part.
  • These unexpectedly good properties are achieved by the incorporation of boron in the aluminum oxide layers with the simultaneous incorporation of oxygen components in the oxycarbide, oxycarbonitride, oxynitride, oxiboride, oxibornitride and oxiborocarbonitride intermediate layers.
  • oxygen and boron contents of the individual layers are within the specified limits.
  • the influence of oxygen can practically no longer be determined below 0.1% by weight.
  • the hardness of the intermediate layers drops very quickly and does not increase the wear resistance of the layer structure according to the invention.
  • an underlayer between the base body and the coating according to the invention.
  • This underlayer preferably has a single or multi-layer structure consisting of one or more carbides, nitrides, carbonitrides, borides or boron nitrides of the elements of IV. To VI. Group of the periodic table.
  • titanium oxycarbonitride and / or titanium oxynitride with a layer thickness of 0.05 to 1 ⁇ m directly on a base body made of hard metal or over a base layer and then a single aluminum-boron mixed oxide layer with a layer thickness from 2 to 10 ⁇ m.
  • a particularly preferred embodiment of the invention provides that directly on a base body made of hard metal or over an underlayer of a coating, consisting of a layer of titanium oxycarbonitride and / or titanium oxynitride with a layer thickness of 0.1 to 1 ⁇ m and subsequently of 2 to 8 aluminum-boron mixed oxide layers having layer thicknesses of 0.3 to 2 microns, respectively, alternating with 1 to 7 layers of Titanoxikarbonitrid and / or titanium oxynitride of the layer thicknesses of 0.05 to 0.5 m Jl are applied.
  • the titanium oxycarbonitride and / or titanium oxynitride layers preferably have an oxygen content of 0.5 to 3% by weight, while the aluminum-boron mixed oxide layers preferably have a boron content of 0.04-0.4% by weight. -% exhibit.
  • this multilayered layer structure according to the invention results in a further increase in the toughness of the coating with an excellent adhesive strength of the individual layers and thus in an unexpected increase in the wear resistance under impact stress compared to a layer structure according to the invention which contains only one aluminum-boron mixed oxide layer of the wearing part.
  • a particularly preferred underlayer starting from a base body made of hard metal, has the layer sequence titanium carbide and / or titanium carbonitride and / or titanium nitride with a total layer thickness of 1 to 8 ⁇ m .
  • the aluminum-boron mixed oxides partially contain titanium, zirconium, hafnium, niobium, chromium and / or magnesium oxides.
  • the mixed oxides can also have a nitrogen content of 0.14-2.76% by weight (0.2 to 4 atomic%).
  • the hard material coating of the wearing part according to the invention is preferably carried out by the CVD process, the chemical composition of the individual layers being determined by appropriate mixing ratios of the reaction gases.
  • Another preferred method for producing the wearing part according to the invention is that the individual layers of appropriate chemical composition are produced both by deposition using the CVD method and by interdiffusion between adjacent layers.
  • the introduction of the oxygen fractions into the oxycarbide, oxycarbonitride, oxynitride, oxiboride, oxibornitride and / or oxiborocarbonitride layers can take place both via an appropriate gas mixture composition, for example CO 2 H z O vapor, air, O 2 or contain other oxidizing gases, as well as by interdiffusion from the adjacent aluminum-boron mixed oxide layers.
  • This interdiffusion can be carried out, for example, by a temperature treatment between or after the individual coating runs at a temperature which is above the coating temperature, or during the coating travel of the aluminum-boron mixed oxide layers by means of an increased supply of oxygen in the gas mixture.
  • indexable inserts made of carbide of the UIOT grade / composition 6% Co, 5% TiC, 5% (TaC + NbC), 84% WC coatings corresponded to the USO application group MIO / and the shape SPGN 120308 EN in 5 different layer construction variants applied according to the table below.
  • the indexable inserts were cleaned, installed in the coating chamber of a prototype system from the applicant, heated to the coating temperature under protective gas and coated under the following coating conditions.
  • Variants 4 and 5 are provided with a layer structure according to the invention. These variants are compared with variants 1 to 3, which have a layer structure which differs from the invention and is known in one case, in a machining test.
  • the wear mark width v B of the open area wear was measured after a rotation time of 5 min.
  • the single-layer Al 2 O 3 or aluminum-boron mixed oxide layer is replaced by 4 layers, that by 3 Ti (C, N) or 3 Ti (C, N, 0) intermediate layers are connected.
  • a Ti (C 0.6 , N 0.4 ) layer was deposited on indexable inserts of the same type as in Example 1 and a TiN layer was deposited thereon.
  • the further layer structure was carried out in two variants, variant 2 representing a layer structure according to the invention.
  • the coating was carried out under reduced pressure. The wear resistance of the individual variants was again compared with one another in a machining test.
  • Oxygen content of the Ti (C, N, O) layers approx. 2% by weight.
  • the end of the service life was given by scour wear in both variants.
  • the end of the service life was 32 minutes for variant 1 and 41 minutes for variant 2 according to the invention.
  • the invention is not limited to hard metal base bodies.
  • the layer structure according to the invention also leads to other base materials such as e.g. with high-speed steel, stellite or other heat-resistant alloys, this leads to an unexpectedly large increase in wear resistance.
  • the invention is not limited to machining tools. Rather, it also extends to tools for non-cutting machining such as drawing dies and the like. As well as to tools that are mainly exposed to eroding wear, such as. B. rock drilling.

Claims (10)

1. Pièce d'usure, en particulier pièce de rechange de découpe en métal dur ou carbure pour l'usinage, par enlèvement de copeaux, avec un revêtement en matériau dur multi-couches, selon lequel est réalisé au moins une couche sous forme de couche d'oxyde, caractérisée en ce que le revêtement déposé sur le corps ou matériau de base immédiatement ou sur une couche sous-jacente se compose, soit d'une, soit de plusieurs couches d'oxycarbure et/ou d'oxycarbonitrure et/ou d'oxynitrure et/ou d'oxyborure et/ou d'oxyboro- nitrure et/ou d'oxyborocarbonitrure, des éléments Ti, Zr, Hf, B, Si, AI avec une teneur en oxygène de 0,1 à 5% en poids, respectivement en alternance avec une ou plusieurs couches d'oxyde mixte aluminium-bore, avec une teneur en bore de 0,01 à 1 % en poids.
2. Pièce d'usure selon la revendication 1, caractérisée en ce que la couche sous-jacente présente une formation de couches à un ou plusieurs dépôts d'un ou plusieurs carbures, nitrures, carbonitrures, borures ou boronitrures des IVe à Vle groupes du système périodique.
3. Pièce d'usure selon la revendication 1, caractérisée en ce qu'immédiatement sur le corps de base ou sur une couche sous-jacente, sont déposées une couche d'oxycarbonitrure de titane et d'oxynitrure de titane avec une épaisseur de couche de 0,05 et en liaison avec celle-ci, une couche d'oxyde mixte d'aluminium-bore avec une épaisseur de couche de 2 à 10 Jlm.
4. Pièce d'usure selon la revendication 1, caractérisée en ce qu'immédiatement sur le corps de base ou sur une couche sous-jacente, sont déposées une couche d'oxycarbonitrure de titane et/ou d'oxynitrure de titane avec une épaisseur de couche de 0,1 à 1 Jlm et en liaison avec celle-ci, alternativement 2 à 8 couches d'oxyde mixte d'aluminium-bore avec des épaisseurs de couche de 0,3 à 2 µm, respectivement en alternance avec 1 à 7 couches d'oxycarbonitrure de titane et/ou d'oxynitrure de titane avec des épaisseurs de couche de 0,05 à 0,5 µm.
5. Pièce d'usure selon les revendications 3 et 4, caractérisée en ce que les couches d'oxycarboni- trure de titane et/ou d'oxynitrure de titane présentent une teneur en oxygène de 0,5 à 3% en poids.
6. Pièce d'usure selon les revendications 3 et 5, caractérisée en ce que les couches d'oxyde mixte d'aluminium-bore présentent une teneur en bore de 0,04 à 0,4% en poids.
7. Pièce d'usure selon les revendications 1 à 6, caractérisée en ce que la couche sous-jacente présente depuis la séquence de couches carbure de titane et/ou carbonitrure de titane et/ou nitrure de titane une épaisseur de couches totale de 1 à 8 µm.
8. Pièce d'usure selon les revendications 1 à 7, caractérisée en ce que l'oxyde mixte présente une teneur en azote de 0,14-2,76% en poids (0,2 à 4 atomes %).
9. Procédé de fabrication d'une pièce d'usure selon les revendications 1 à 8, caractérisé en ce qu'on réalise le dépôt de formation de couches en matériau dur selon le procédé CVD, selon lequel on peut fixer la composition chimique des différentes couches par un rapport correspondant du mélange des gaz réactionnels.
10. Procédé de fabrication d'une pièce d'usure selon les revendications 1 à 8, caractérisé en ce que la fabrication des différentes couches de compositions chimiques correspondantes se produit aussi bien par le dépôt selon le procédé CVD qu'également par interdiffusion entre des couches limitrophes.
EP82111762A 1981-12-24 1982-12-17 Pièce d'usure Expired EP0083043B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5557/81 1981-12-24
AT0555781A AT377786B (de) 1981-12-24 1981-12-24 Verschleissteil, insbesondere hartmetall -schneideinsatz zur spanabhebenden bearbeitung

Publications (2)

Publication Number Publication Date
EP0083043A1 EP0083043A1 (fr) 1983-07-06
EP0083043B1 true EP0083043B1 (fr) 1985-07-03

Family

ID=3577093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111762A Expired EP0083043B1 (fr) 1981-12-24 1982-12-17 Pièce d'usure

Country Status (5)

Country Link
US (1) US4599281A (fr)
EP (1) EP0083043B1 (fr)
JP (1) JPS58115081A (fr)
AT (1) AT377786B (fr)
DE (1) DE3264591D1 (fr)

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US6726987B2 (en) 2001-02-09 2004-04-27 Plansee Tizit Aktiengesellschaft Hard metal wearing part with mixed oxide coating

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US6726987B2 (en) 2001-02-09 2004-04-27 Plansee Tizit Aktiengesellschaft Hard metal wearing part with mixed oxide coating

Also Published As

Publication number Publication date
JPS6154114B2 (fr) 1986-11-20
AT377786B (de) 1985-04-25
ATA555781A (de) 1984-09-15
US4599281A (en) 1986-07-08
DE3264591D1 (en) 1985-08-08
EP0083043A1 (fr) 1983-07-06
JPS58115081A (ja) 1983-07-08

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