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EP0948659B1 - Poudre de revetement et procede de production de ladite poudre - Google Patents

Poudre de revetement et procede de production de ladite poudre Download PDF

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Publication number
EP0948659B1
EP0948659B1 EP97912020A EP97912020A EP0948659B1 EP 0948659 B1 EP0948659 B1 EP 0948659B1 EP 97912020 A EP97912020 A EP 97912020A EP 97912020 A EP97912020 A EP 97912020A EP 0948659 B1 EP0948659 B1 EP 0948659B1
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EP
European Patent Office
Prior art keywords
coating powder
hard material
powder according
hard
phase
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
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EP97912020A
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German (de)
English (en)
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EP0948659A1 (fr
Inventor
Lutz-Michael Berger
Manfred Nebelung
Petri Vuoristo
Tapio Mäntylä
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Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/04—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbonitrides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2207/00—Aspects of the compositions, gradients
    • B22F2207/01—Composition gradients
    • B22F2207/07—Particles with core-rim gradient

Definitions

  • the invention relates to a coating powder for use in various Coating technologies, such as the different variants of the thermal spraying, such as plasma spraying, High speed flame spraying (HVOF) and detonation spraying, as well as others Processes such as coating by laser or powder plasma deposition welding.
  • the coating powder according to the invention can be applied by means of these methods various highly stressed components are applied, which the various stresses, such as abrasive and erosive Wear, corrosion and high temperatures or various Combinations of these stresses are exposed, and in the different areas of technology find their application.
  • Application examples are coated components in vehicle construction, in mechanical engineering, in chemical and petrochemical plants, and many other industries.
  • Various hard metal-like coating powders are widely used in technology. These are characterized in that a carbide hard material such as WC or Cr 3 C 2 is embedded in a ductile binder matrix.
  • the most important systems for coatings are WC-Co and Cr 3 C 2 -NiCr.
  • WC-Co has a very high wear resistance. Use at elevated temperatures (up to a maximum of 450 ° C). and simultaneous chemical exposure is limited. Attempts have been made to improve the corrosion resistance in particular by using other binders such as Ni and alloy with chromium, which is only possible to a limited extent due to the low alloyability of the system.
  • Cr 3 C 2 -NiCr can be used well at higher temperatures (up to 750-800 ° C) and corrosive loads. However, the wear resistance of the system is lower than that of WC-Co.
  • DD 224 057 describes a coating powder based on TiC which, in addition to at least one of the metals Ni, Co, Cr, W and B and / or Si, also contains Mo or Mo 2 C and free carbon. Individual components, such as Mo 2 C, can be bound to the TiC. Because there is no composite powder with a hard metal-like microstructure and the individual powder components are very coarse, no highly wear-resistant layers can be produced.
  • DE 41 34 144 describes a carbide wettable powder, which is coated with active carbon is supposed to protect the core from signs of oxidation, described.
  • the wettable powders to be coated are there in a matrix of metals the group iron, nickel and cobalt also mentions titanium carbide and titanium carbonitride.
  • WO 87/04732 describes a method for producing a wear-resistant one Layer, made of a powdered material of 10-50 mass% TiC and a Fe- and / or contains Ni alloy or a Co alloy. The proportion of the hard material phase is too low for these compositions to wear resistance to increase significantly.
  • EP 0 425 464 describes a roll for paper manufacture, which has several Layers is provided.
  • the top layer is a hard metal-like layer, the hard material phase of tungsten, chromium, titanium, niobium or boron carbides or of a mixture of these, and their metallic binder phase Ni, Co or Fe or their alloys with transition metals of IV. to VI.
  • Sub-group of the PSE can be alloyed.
  • the hard phase content can be up to 96%.
  • M.Yu. Zashlyapin et al. (Sashchitnye pokrytiya na metallakh, volume 20, 1986, p. 52-55) describe coating powder with TiCN as hard material phase and binders from 75% mass% Ni and 25% mass% Mo, which in the composite powder with 35-65 % By mass are included. This corresponds to 65-78 vol .-% hard phase in Coating powder.
  • the sintered wettable powders made of TiCN and a solid solution of TiCN and Mo in the Nickel matrix Through the use of Mo as a starting material and with it associated low non-metal content, this powder is susceptible to oxidation and substrates coated with it show poor wear behavior.
  • the layers produced from these coating powders are better than those which were produced from TiC-containing coating powders from the prior art, but have not yet been improved so significantly (e.g. in abrasive wear) that these layers are sufficiently superior and competitive compared to other hard metal systems .
  • Coating powder should accordingly be achieved by conventional Coating technologies carbide-like, extremely resistant layers can be generated on highly stressed components compared to known technical solutions improved combinations of properties such as high Wear resistance at high temperature, high wear resistance with simultaneous high corrosive load, low friction coefficient at high temperature, have and easily by varying the composition to different Stress profiles can be adjusted.
  • these tasks relate to the coating powder according to one or more of claims 1 to 18 and relating to the method for the production of this powder according to one or more of claims 19 to 21 solved.
  • the coating powder according to the invention is characterized in that it has a hard metal-like microstructure.
  • Two cubic hard material phases which have a karn-shell structure and form a hard material grain, are embedded in a metallic binder matrix composed of at least one or more of the elements Ni, Co and Fe.
  • Said core-shell structure is formed by metallurgical reactions, dissolution and re-elimination processes during the sintering process in the production of coating powder.
  • the task of the hard material phase in the shell is, in particular, to improve the poor wetting of the pure hard material TiC with the usual binding metals Ni, Co and Fe or their alloys.
  • the metals Mo and W which are added in particular in the form of their carbides Mo 2 C or WC as starting powder in the production of coating powder, have proven to be particularly suitable.
  • these carbides preferentially dissolve in the binder compared to TiC and separate in the cooling phase of the sintering process as mixed carbides (Ti, Mo) C 1-x or (Ti, W) C 1-x as a shell around undissolved TiC grains from.
  • Nitrogen is advantageously added as a further alloy element.
  • This can be achieved by using the titanium carbide, which is the starting material for Coating powder production is used, in whole or in part Titanium carbonitride replaced.
  • titanium carbide which is the starting material for Coating powder production is used, in whole or in part Titanium carbonitride replaced.
  • From the developments for cutting materials it is known that by increasing the nitrogen content in particular the Mo and / or W content in the binder phase (P. Etmayer et al., Int. J. Refractory Metals & Hard Materials, 1995, No. 6, vol. 13, p.343-351).
  • the well known fact that made of carbonitrides at elevated temperatures, as is the case with thermal spraying occur, nitrogen is released is due to the application of nitrogen in commercial carbide-like coating powders have so far been dispensed with.
  • microstructural according to the invention Formation of the coating powder in the hard phases before nitrogen losses Spraying process are protected.
  • the use of nitrogen-containing coating powders is particularly advantageous if these layers are used to produce one must have a low coefficient of friction.
  • the elements Zr, Hf, V, Nb, Ta and Cr are also further alloy elements according to the invention. these can can be used both alone and together with nitrogen. Alloy elements such as Al, B and others are also special Use cases advantageous.
  • metallic alloy elements in the form of carbides are introduced during the production of the coating powder.
  • Cr 3 C 2 , Cr 7 C 3 , Cr 23 C 6 , WC, W 2 C and Mo 2 C can, for example, still be detectable by X-ray phase analysis after the sintering process.
  • the orthorhombic Cr 3 C 2 is detected, for example, after sintering from a certain amount by X-ray phase analysis.
  • the carbide hard materials Cr 3 C 2 , Cr 7 C 3 , Cr 23 C 6 , WC, W 2 C and Mo 2 C oxidize in such a way that a free carbide of the metal is released when free carbon is released - if this is stable - and then the metal itself is formed (RFVoitovich, Okislenie karbidov i nitridov, Kiev, Naukova dumka, 1981).
  • This forming metal is able to further alloy the metallic binder.
  • This also has the effect that the alloy state of the binder is positively influenced and the oxygen content in the layer is reduced.
  • the chromium formed by oxidation of the Cr 3 C 2 significantly increases the corrosion resistance of the binder. It is also important that all carbidic and carbonitridic starting materials used for coating powder production have a low oxygen content.
  • Such a distribution of the alloy elements is also within the meaning of the present invention.
  • Ti (C, N) As a starting material.
  • nitrogen accumulation occurs in the core of the hard material particles, while the nitrogen content is lower in the envelopes, but an accumulation of Mo or W can be observed (P. Etmayer, H. Kolaska, Metall, 1989, volume 43 , Issue 8, pp.742-749).
  • this means that the content of titanium and carbon in the cores of the hard materials is> 60 atom%, and at the same time the content of titanium, the second metal and carbon is> 50 atom% in the shells.
  • these values are well above the specified limit values.
  • Several shell phases can also be detectable in special alloy variants.
  • the volume ratio between the hard material phases and the Binder phase in the coating powder according to the invention varied within wide limits sufficient wear resistance of the layers is only achieved if the volume fraction of hard materials, based on the raw materials before Sintering,> 60 vol .-%.
  • both individual hard materials such as TiC, TiN, Ti (C, N), Mo 2 C, WC, and Cr 3 C 2
  • complex hard materials such as (Ti, Mo) C and (W, Ti) C
  • single hard materials are preferably used.
  • the carbon content of the titanium-containing hard materials is in the range from 4 to 21% by mass, the nitrogen content is a maximum of 17% by mass.
  • TiC or Ti (C, N) this corresponds to all compositions of the solid mixed crystals from TiC to approximately TiC 0.3 N 0.7 . In the corresponding ratio, TiC and TiN can also be used as starting materials.
  • the volume fraction of these titanium-containing hard materials is 50-95% by volume, preferably 60-85% by volume. If a third hard material phase is used, its proportion is at most 35% by volume, preferably at most 25% by volume. The proportion of the second hard material phase responsible for the formation of the core-shell structure results from the respective differences.
  • the alloying elements such as W, Mo, Cr, are preferably used as Carbides are added and can accumulate during the sintering process Coating powder production both in the cubic hard material phases and partially dissolve in the binder phase.
  • the core-shell structure of the cubic that characterizes the coating powder Hard material phases are transferred to the layer and can be detected in it.
  • Another advantage of the coating powder according to the invention is that it with the most diverse process variants of thermal spraying almost equally well can be processed.
  • the coating powder according to the invention can be different Coating powder manufacturing technologies as the main technological Step include a sintering process, such as Sintering and breaking.
  • a sintering process such as Sintering and breaking.
  • Coating powder particles of irregular morphology For the Processing coating powders has been shown to be spherical Morphology, which increases the flowability of the powder, has a particularly favorable effect. Therefore, the preferred technology for producing the invention Spray powder used the agglomeration and sintering.
  • a spray drying process for agglomeration advantageously used a spray drying process.
  • the spray drying parameters should be selected so that granules with a high green density are produced, which are compacted by a simple sintering process, in which the core-shell structure which can form hard material phases in the binder matrix.
  • the height The green density of the spray drying granules is still important for the fact that the Sintering together individual granules is kept to a minimum. Through the Sintering leads to a change in the phase composition in the coating powders through the metallurgical reactions, solution and Processes of re-excretion, changes in the elementary Compositions are insignificant.
  • the size of the hard material particles with core-shell structure in the sintered coating powder is ⁇ 10 ⁇ m, but preferably ⁇ 5 ⁇ m. After sintering, the coating powder is slightly sintered together prepared by a gentle grinding process and then according to the Requirements for its application in one of the above Coating technologies fractionated.
  • the grain size of the coating powder according to the invention must Requirements of the respective coating technology can be adapted, it can therefore lie in a wide range of 10-250 ⁇ m.
  • Binder are premixed dry, dispersed in water and then mixed intimately in a roller chair in stainless steel containers with hard metal balls.
  • the suspension is mixed with 1.5% by mass of an adapted binder made of polyvinyl alcohol and polyethylene glycol and then granules are produced in a spherical shape by spray drying.
  • the binder is driven out together with the sintering in a one-stage tempering.
  • Debinding and tempering are carried out in flat graphite crucibles under argon at a heating rate of 5 K / min to 600 ° C and 10 K / min up to the sintering temperature at 1320 ° C, which is followed by an isothermal holding time of 30 min.
  • Figure 1 shows the metallographic cross section of a coating powder particle with a magnification of 3000 times. The grain-shell structure of the hard material particles can be clearly seen.
  • the sintered powders are subjected to gentle grinding and then fractionated according to the requirements for use in the various coating technologies.
  • the preferred grain size for use in high-speed flame spraying or detonation spraying is 20-45 ⁇ m.
  • the d10 of this powder was 20 ⁇ m, the d90 42 ⁇ m.
  • the spraying conditions optimized for this material were used.
  • the spray distance was 120 mm with a detonation rate of 6.6 detonations / s.
  • An acetylene / oxygen mixture in a volume ratio of 1.0 was used.
  • the coating powder was fractionated; a particle size range of 20-45 ⁇ m was also used for spray tests.
  • the morphology of this wettable powder according to the invention is shown in Figure 4.
  • the coating powder was also processed under spray conditions analogous to embodiment 1 using the "Perun P" detonation spray system (Paton Institute, Ukraine) to give layers with a layer thickness of approximately 250 ⁇ m on steel substrates which are suitable for the abrasion test.
  • the mass loss after 5904 m wear path was 68 mg, when converted to the volume loss 10.6 mm 3 .
  • the coating powder was also processed under spray conditions analogous to embodiment 1 using the "Perun P" detonation spray system (Paton Institute, Ukraine) to give layers with a layer thickness of approximately 250 ⁇ m on steel substrates which are suitable for the abrasion test.
  • the mass loss after 5904 m wear path was 58 mg, when converted to the volume loss 8.9 mm 3 .
  • the coating powder was also processed under spray conditions analogous to embodiment 1 using the "Perun P" detonation spray system (Paton Institute, Ukraine) to give layers with a layer thickness of approximately 250 ⁇ m on steel substrates which are suitable for the abrasion test.
  • the mass loss after 5904 m wear path was 80 mg, when converted to the volume loss 12.1 mm 3 .
  • a coating powder from embodiment 1 was likewise applied to a steel substrate suitable for the abrasion test using a PT A-3000S plasma spraying system with an F4 burner in the atmosphere.
  • An Ar / H 2 plasma (best results at 45 l / min Ar and 14 l / min H2) with a plasma output of 38 kW was used for this.
  • the mass loss after 5904 m wear path was 100 mg, when converted to the volume loss 16.4 mm 3 .
  • a coating powder from embodiment 1 by high-speed flame spraying with a PT CDS spraying system with a gas mixture of hydrogen (600 l / min) and oxygen (300 l / min) at a spraying distance of 200 mm was also applied to steel substrates suitable for the abrasion test.
  • the mass loss after 5904 m wear path was 94 mg, when converted to the volume loss 15.4 mm 3 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Powder Metallurgy (AREA)
  • Paints Or Removers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Materials For Medical Uses (AREA)

Claims (21)

  1. Poudre pour revétement à microstructure ressemblant à celle d'un métal dur, constituée de deux phases de matériau dur cubique représentant l'une et l'autre une structure à noyau-enveloppe de particule de matériau dur, la phase de matériau dur dans le noyau étant constituée pour une part prédominante de Ti et de C et la phase de matériau dur dans l'enveloppe étant constituée pour une part prédominante de Ti, un second métal, mais différent de Ni, Co et Fe et de carbone, et celles-ci étant enrobées dans une phase de liant constituée d'au moins un ou plusieurs des éléments Ni, Co et Fe,
    caractérisée en ce qu'
    on trouve soit dans les phases de matériau dur, soit dans a phase de liant, soit dans les deux simultanément, au moins un autre élément d'alliage, et dans la phase de liant métallique peut être enrobée au moins une troisième phase de matériau dur de type carbure, qui se décompose au cours du processus de revêtement sous une atmosphère contenant de l'oxygène avec perte de carbone et dont les composants métalliques s'allient avec les autres phases de matériau dur et/ou la phase de liant, ou restent sous forme dissoute comme carbure dans le liant par le refroidissement rapide.
  2. Poudre pour revétement selon la revendication 1,
    caractérisée en ce que
    la phase de matériau dur cubique dans l'enveloppe contient comme second métal Mo ou W.
  3. Poudre pour revétement selon la revendication 1 ou 2,
    caractérisée en ce que
    les autres éléments d'alliage sont N et/ou au moins un des éléments Zr, Hf, V, Nb, Ta et Cr.
  4. Poudre pour revêtement selon une ou plusieurs des revendications 1 à 3,
    caractérisée en ce que
    la phase de liant métallique est en outre alliée avec W et/ou Mo, mais un des éléments, ou les deux, étant simultanément contenu dans la phase de matériau dur cubique formant l'enveloppe.
  5. Poudre pour revêtement selon l'une ou plusieurs des revendications 1 à 4,
    caractérisée en ce que
    la troisième phase ou toute autre phase carbure présente un réseau cristallin cubique ou autre.
  6. Poudre pour revétement selon les revendications 1 ou 5,
    caractérisée en ce que
    pour ce qui est des phases carbures, il s'agit de Cr3C2, Cr7C3, Cr23C6, WC, W2C et Mo2C.
  7. Poudre pour revétement selon une ou plusieurs des revendications 1 à 6,
    caractérisée en ce que
    la proportion volumique des matériaux durs, par rapport aux produits de départ avant frittage, s'élève à plus de 60 % en volume.
  8. Poudre pour revétement selon la revendication 7,
    caractérisée en ce que
    la proportion volumique des matériaux durs par rapport aux produits de départ avant le frittage, se situe dans un intervalle allant de 70 à 95 % en volume.
  9. Poudre pour revêtement selon la revendication 8,
    caractérisée en ce que
    la proportion volumique des matériaux durs, par rapport aux produits de départ avant le frittage, se situe dans un intervalle allant de 80 à 95 % en volume.
  10. Poudre pour revêtement selon l'une ou plusieurs des revendications 1 à 9,
    caractérisée en ce que
    la teneur en carbone de la masse de matériau dur contenant du titane s'élève à 4 à 22 % massique et la teneur en azote des matériaux durs contenant du titane s'élève au maximum à 17 % massique en cas d'utilisation des divers matériaux durs TiC, TiN ou Ti(C,N) par rapport aux produits de départ avant le frittage.
  11. Poudre pour revêtement selon l'une ou plusieurs des revendications 7 à 10,
    caractérisée en ce que
    la proportion volumique des matériaux durs contenant du titane lors de l'utilisation des divers matériaux durs TiC, TiN ou Ti(C,N), par rapport aux produits de départ avant le frittage et à la proportion totale en materiau dur, s'élève à 50 à 95 % en volume.
  12. Poudre pour revêtement selon la revendication 11,
    caractérisée en ce que
    la proportion volumique des matériaux durs contenant du titane lors de l'utilisation des divers matériaux durs TiC, TiN ou Ti(C,N), par rapport aux produits de départ avant le frittage et à la proportion totale de matériau dur, s'élève à 60 à 90 % en volume.
  13. Poudre pour revêtement selon l'une ou plusieurs des revendications 1 à 12,
    caractérisée en ce que
    la proportion volumique de la troisième phase de matériau dur carbure, par rapport aux produits de dèpart avant le frittage et à la proportion totale de matériau dur, s'élève au maximum à 35 % en volume.
  14. Poudre pour revêtement selon la revendication 13,
    caractérisée en ce que
    la proportion volumique de la troisième phase de matériau dur carbure, par rapport aux produits de départ avant le frittage et à la proportion totale de matériau dur, s'élève au maximum à 25 % en volume.
  15. Poudre pour revétement selon l'une ou plusieurs des revendications 1 à 14,
    caractérisée en ce que
    la granulométrie des particules frittées se situe dans un intervalle allant de 10 à 250 µm.
  16. Poudre pour revêtement selon la revendication 15,
    caractérisée en ce que
    la granulométrie des particules frittées se situe dans un intervalle allant de 20 à 90 µm.
  17. Poudre pour revétement selon la revendication 16,
    caractérisée en ce que
    la granulométrie des particules frittées se situe dans un intervalle allant de 10 à 45 µm.
  18. Poudre pour revétement selon la revendication 15, 16 ou 17,
    caractérisée en ce que
    les particules frittées présentent une morphologie sphérique.
  19. Procédé de production des poudres pour revêtement selon l'une ou plusieurs des revendications 1 à 18,
    caractérisé en ce que
    les divers matériaux durs et les poudres métalliques sont mélangés et homogénéisés dans une suspension aqueuse par une opération simultanée de broyage et de mélange dans un broyeur à boulets, puis granulés, frittés, et préparés par une technique de broyage.
  20. Procédé de production de la poudre pour revêtement selon la revendication 19,
    caractérisé en ce que
    la granulation s'effectue au moyen d'un séchage par pulvérisation.
  21. Procédé de production des poudres pour revétement selon la revendication 19 ou 20,
    caractérisé en ce que
    le frittage s'effectue en fonction de la composition de l'alliage et à des températures auxquelles il se forme une phase suffisamment liquide, qui permet les réactions métallurgiques et les processus de dissolution et de redépôt, qui sont nécessaires pour la formation de la structure noyau-enveloppe des phases de matériau dur cubique.
EP97912020A 1996-10-02 1997-09-25 Poudre de revetement et procede de production de ladite poudre Expired - Lifetime EP0948659B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19640788A DE19640788C1 (de) 1996-10-02 1996-10-02 Beschichtungspulver und Verfahren zu seiner Herstellung
DE19640788 1996-10-02
PCT/DE1997/002207 WO1998014630A1 (fr) 1996-10-02 1997-09-25 Poudre de revetement et procede de production de ladite poudre

Publications (2)

Publication Number Publication Date
EP0948659A1 EP0948659A1 (fr) 1999-10-13
EP0948659B1 true EP0948659B1 (fr) 2001-12-05

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EP97912020A Expired - Lifetime EP0948659B1 (fr) 1996-10-02 1997-09-25 Poudre de revetement et procede de production de ladite poudre

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US (1) US6162276A (fr)
EP (1) EP0948659B1 (fr)
JP (1) JP4282767B2 (fr)
AT (1) ATE210205T1 (fr)
BR (1) BR9711858A (fr)
CA (1) CA2267960C (fr)
DE (1) DE19640788C1 (fr)
NO (1) NO321957B1 (fr)
WO (1) WO1998014630A1 (fr)

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WO2004094685A2 (fr) * 2003-04-22 2004-11-04 Diamond Innovations, Inc. Procedes d'obtention et d'application d'un revetement resistant a l'usure et articles enduits connexes
US6863990B2 (en) * 2003-05-02 2005-03-08 Deloro Stellite Holdings Corporation Wear-resistant, corrosion-resistant Ni-Cr-Mo thermal spray powder and method
US7074253B2 (en) * 2003-05-20 2006-07-11 Exxonmobil Research And Engineering Company Advanced erosion resistant carbide cermets with superior high temperature corrosion resistance
US7247186B1 (en) * 2003-05-20 2007-07-24 Exxonmobil Research And Engineering Company Advanced erosion resistant carbonitride cermets
US7175686B2 (en) * 2003-05-20 2007-02-13 Exxonmobil Research And Engineering Company Erosion-corrosion resistant nitride cermets
ES2320592T3 (es) * 2005-07-11 2009-05-25 Akzo Nobel Coatings International Bv Materiales de recubrimiento en polvo.
CN101248145B (zh) * 2005-07-11 2012-07-04 阿克佐诺贝尔国际涂料股份有限公司 制备粉末涂料组合物的方法
US20070099014A1 (en) * 2005-11-03 2007-05-03 Sulzer Metco (Us), Inc. Method for applying a low coefficient of friction coating
DE102007004937B4 (de) * 2007-01-26 2008-10-23 H.C. Starck Gmbh Metallformulierungen
BRPI1101402A2 (pt) * 2011-03-29 2013-06-04 Mahle Metal Leve Sa elemento deslizante
US20130260172A1 (en) * 2012-04-02 2013-10-03 Kennametal Inc. Coated titanium alloy surfaces
JP2017013047A (ja) * 2015-07-01 2017-01-19 株式会社神戸製鋼所 被覆粒子
CN106001550B (zh) * 2016-06-03 2018-10-19 广东工业大学 一种以TiC-Ni-Mo2C合金为耐磨相的耐磨金属陶瓷及其制备方法与应用
CN106216663A (zh) * 2016-09-18 2016-12-14 广东工业大学 一种金属陶瓷颗粒及其制备方法应用
CN106216662A (zh) * 2016-09-18 2016-12-14 广东工业大学 一种金属陶瓷颗粒及其制备方法与应用

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US3859057A (en) * 1970-03-16 1975-01-07 Kennametal Inc Hardfacing material and deposits containing tungsten titanium carbide solid solution
JPS5425232A (en) * 1977-07-28 1979-02-26 Riken Piston Ring Ind Co Ltd Sliding parts having wearrresistant jet coated layer
DD224057A1 (de) * 1984-05-14 1985-06-26 Immelborn Hartmetallwerk Beschichtungspulver auf der basis von titancarbid
CH670103A5 (fr) * 1986-02-04 1989-05-12 Castolin Sa
FI86566C (fi) * 1989-10-27 1992-09-10 Valmet Paper Machinery Inc Vals foer anvaendning vid pappersframstaellning och foerfarande foer framstaellning av valsen.
DE4134144C2 (de) * 1991-10-16 1994-04-21 Fraunhofer Ges Forschung Karbidisches Spritzpulver

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Publication number Publication date
CA2267960C (fr) 2003-07-08
EP0948659A1 (fr) 1999-10-13
ATE210205T1 (de) 2001-12-15
NO991572D0 (no) 1999-03-30
DE19640788C1 (de) 1997-11-20
CA2267960A1 (fr) 1998-04-09
JP2001503105A (ja) 2001-03-06
WO1998014630A1 (fr) 1998-04-09
NO991572L (no) 1999-03-30
NO321957B1 (no) 2006-07-31
US6162276A (en) 2000-12-19
BR9711858A (pt) 1999-08-24
JP4282767B2 (ja) 2009-06-24

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