EP0492323A2 - Method for the surface-treatment of parts - Google Patents

Method for the surface-treatment of parts Download PDF

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Publication number
EP0492323A2
EP0492323A2 EP91121460A EP91121460A EP0492323A2 EP 0492323 A2 EP0492323 A2 EP 0492323A2 EP 91121460 A EP91121460 A EP 91121460A EP 91121460 A EP91121460 A EP 91121460A EP 0492323 A2 EP0492323 A2 EP 0492323A2
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EP
European Patent Office
Prior art keywords
layer
shot
coverage
peened
mcraly
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Granted
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EP91121460A
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German (de)
French (fr)
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EP0492323A3 (en
EP0492323B1 (en
Inventor
Thomas Sedlmair
Horst Pillhöfer
Peter Dr. Adam
Martin Dr. Thoma
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MTU Aero Engines GmbH
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MTU Motoren und Turbinen Union Muenchen GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • 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
    • C23C4/18—After-treatment

Definitions

  • the invention relates to a method for the surface treatment of components by means of shot peening.
  • Shot peening to improve the fatigue strength of components are known from the publication by W. Schütz in the journal Material Technology, 17, pages 53-61, (1986). Shot peening primarily increases the vibration resistance of the components through favorable compressive residual stresses and increases the hardness of the blasted component surface.
  • the optimization of the blasting treatment depends on the machine type, the blasting time, the particle size, the degree of coverage and the blasting intensity. To harden and improve the vibration resistance, optimization is carried out in the direction of high beam intensity with a low degree of coverage up to 100%. With higher degrees of coverage, the risk of surface deformation and material damage increases.
  • the object of the invention is to provide a method for the surface treatment of components, which coating the surface resistant to oxidation and hot gas corrosion and enables smoothing of the rough coating surface.
  • the surface treatment should not reduce the adhesion of the coating and should not cause uneven layer removal.
  • a MCrAlY layer is first applied to the component surface as an oxidation and hot gas corrosion layer, the layer surface of which is then coated with particle beams with a radiation intensity of at most 0.15 mm Almen A, a coverage of at least 400% and a mean shot particle diameter of at most 0.5 mm is shot peened and smoothed.
  • NDPS method low-pressure plasma spraying
  • the method is reproducible with regard to an improvement in the average roughness value and can also be used in the case of components of complex design.
  • Balls with a mean blasting particle diameter of at most 0.2 mm made of cast steel, aronded steel wire, zirconium oxide, aluminum oxide or glass are preferably used as blasting particles. Such balls have the advantage of further reducing the average roughness.
  • Spheres with an average beam particle diameter of less than 50 ⁇ m show no further improvement in the average roughness value, at least for MCrAlY layers.
  • a preferred implementation of the method provides that the layer surface is shot-peened in critical component areas at preferably low radii of curvature with degrees of coverage over 600% and a greatly reduced beam intensity.
  • This high degree of coverage combined with a greatly reduced beam intensity has the advantage of a combination of micro-deformation and abrasion that gently smoothes these critical component areas.
  • the method is preferably used for airfoil surfaces of high-pressure turbine blades.
  • the MCrAlY layer is smoothed both on the front edge of the blade and on the even more curved rear edge of the blade without a difference in layer thickness occurring.
  • An airfoil surface of a high-pressure turbine blade with an airfoil height of 42 mm and an airfoil width of 20 mm is coated with a CoNiCrAlY layer by means of low-pressure plasma spraying.
  • the measured average roughness value is 4.77 ⁇ m.
  • the surface of this high-pressure turbine blade is then shot-peened in an overpressure nozzle blasting system with glass beads with an average blasting particle diameter of 0.12 mm.
  • the beam intensity is set to 0.23 mm Almen N and a degree of coverage of 800% is achieved.
  • a uniform layer decrease of maximum 20 ⁇ m is measured both on the airfoil surface and in the area of the leading edge and the trailing edge.
  • the mean roughness value has been improved to 1.37 ⁇ m.
  • 1 shows a scanning electron microscope image of an MCrAlY layer after low-pressure plasma spraying, with a roughness depth of 42.3 ⁇ m and a mean roughness value of 4.77 ⁇ m.
  • Fig. 3 shows a cross section of a coated and shot-peened High-pressure turbine blade in the area of the leading edge (1).
  • the boundary (2) between the CoNiCrAlY layer (3) and the blade base material (4) can be clearly seen. Even the leading edge tip (5) is simulated by the smoothed CoNiCrAlY layer (3) and is not leveled.
  • Fig. 4 shows a cross section of the coated and shot-blasted high-pressure turbine blades in the area of the trailing edge (6).
  • the boundary (2) between the CoNiCrAlY layer (3) and the blade base material (4) can be clearly seen.
  • the smoothed CoNiCrAlY layer (3) also reproduces the much more curved trailing edge (6).

Abstract

The invention relates to a method for the surface treatment of parts by means of shot peening. An MCrAlY layer is first deposited on the surface of the part as an oxidation and hot-gas corrosion layer. Then the layer surface is shot-peened using a jet of particles having a jet intensity of not more than 0.15 mm Almen A, a coverage of not less than 400% and a mean jet particle diameter of not more than 0.5 mm to smooth and compact the surface. The method is particularly suitable for the surfaces of high-pressure turbine blades having a low radius of curvature at the leading and trailing edge.

Description

Die Erfindung betrifft ein Verfahren zur Oberflächenbehandlung von Bauteilen mittels Kugelstrahlen.The invention relates to a method for the surface treatment of components by means of shot peening.

Kugelstrahlen zur Verbesserung der Schwingfestigkeit von Bauteilen sind aus der Veröffentlichung von W. Schütz in der Zeitschrift Werkstofftechnik, 17, Seite 53-61, (1986) bekannt. Das Kugelstrahlen steigert primär durch günstige Druckeigenspannungen die Schwingfestigkeit der Bauteile und erhöht die Härte der gestrahlten Bauteiloberfläche. Die Optimierung der Strahlbehandlung ist abhängig vom Maschinentyp, von der Strahldauer, der Partikelgröße, dem Deckungsgrad und der Strahlintensität. Zur Härtung und Verbesserung der Schwingfestigkeit wird in Richtung hoher Strahlintensität bei gleichzeitig niedrigem Deckungsgrad bis 100% optimiert. Bei höheren Deckungsgraden wächst die Gefahr der Oberflächendeformation und der Werkstoffschädigung.Shot peening to improve the fatigue strength of components are known from the publication by W. Schütz in the journal Material Technology, 17, pages 53-61, (1986). Shot peening primarily increases the vibration resistance of the components through favorable compressive residual stresses and increases the hardness of the blasted component surface. The optimization of the blasting treatment depends on the machine type, the blasting time, the particle size, the degree of coverage and the blasting intensity. To harden and improve the vibration resistance, optimization is carried out in the direction of high beam intensity with a low degree of coverage up to 100%. With higher degrees of coverage, the risk of surface deformation and material damage increases.

Beim Kugelstrahlen wird die Oberfläche plastisch deformiert, so daß nachteilig eine hohe Oberflächenrauhigkeit entsteht. Außerdem werden Druckeigenspannungen im oberflächennahen Bereich des Bauteils induziert, so daß sich bei beschichteten Bauteilen nachteilig die Gefahr des Abplatzens der Schicht erhöht.When shot peening, the surface is plastically deformed, so that disadvantageously high surface roughness arises. In addition, residual compressive stresses are induced in the region of the component near the surface, so that the disadvantage of coated components The risk of the layer flaking off increases.

Bei Beschichtungsverfahren, die zunächst eine rauhe Beschichtungsoberfläche auf dem Bauteil erzeugen, wird deshalb nicht mit dem Kugelstrahlverfahren die Oberfläche geglättet, sondern durch mechanisches Nachpolieren, wie beispielsweise Scheuern, Bürstenpolieren oder Druckfließläppen, eine Oberflächenglättung erreicht. Diese bekannten und gebräuchlichen Oberflächenbehanldungen zum Glätten haben den Nachteil, daß sie einen örtlich ungleichmäßigen Schichtabtrag an exponierten Ecken und Kanten bewirken.In coating processes that initially produce a rough coating surface on the component, the surface is therefore not smoothed with the shot-peening process, but instead surface smoothing is achieved by mechanical polishing, such as abrasion, brush polishing or pressure flow lapping. These known and customary surface treatments for smoothing have the disadvantage that they cause a locally uneven layer removal at exposed corners and edges.

Aufgabe der Erfindung ist es, ein Verfahren zur Oberflächenbehandlung von Bauteilen anzugeben, das die Oberfläche oxidations- und heißgaskorrosionsfest beschichtet und eine Glättung der rauhen Beschichtungsoberfläche ermöglicht. Die Oberflächenbehandlung soll die Haftfähigkeit der Beschichtung nicht vermindern und keinen ungleichmäßigen Schichtabtrag verursachen.The object of the invention is to provide a method for the surface treatment of components, which coating the surface resistant to oxidation and hot gas corrosion and enables smoothing of the rough coating surface. The surface treatment should not reduce the adhesion of the coating and should not cause uneven layer removal.

Gelöst wird diese Aufgabe durch ein Verfahren mit den folgenden Verfahrensschritten: auf die Bauteiloberfläche wird zunächst eine MCrAlY-Schicht als Oxidations- und Heißgaskorrosionsschicht aufgebracht, deren Schichtoberfläche anschließend mit Partikelstrahlen einer Strahlenintensität von höchstens 0,15 mm Almen A, einem Dekkungsgrad von mindestens 400% und einem mittleren Strahlpartikeldurchmesser von höchstens 0,5 mm kugelgestrahlt und dabei geglättet wird.This task is solved by a process with the following process steps: a MCrAlY layer is first applied to the component surface as an oxidation and hot gas corrosion layer, the layer surface of which is then coated with particle beams with a radiation intensity of at most 0.15 mm Almen A, a coverage of at least 400% and a mean shot particle diameter of at most 0.5 mm is shot peened and smoothed.

Dieses Verfahren hat den Vorteil, daß ein Mittenrauhwert unter Ra = 2,5µm für MCrAlY-Schichten, die beispielsweise mit Hilfe des Niederdruckplasmaspritzen (NDPS-Verfahren) aufgetragen wurden, erreichbar ist, und die MCrAlY-Schicht gleichzeitig oberflächig verdichtet wird. Darüber hinaus ist das Verfahren reproduzierbar im Hinblick auf eine Mittenrauhwertverbesserung und auch bei kompliziert gestalteten Bauteilen anwendbar.This method has the advantage that a mean roughness value below Ra = 2.5 μm can be achieved for MCrAlY layers, which have been applied, for example, with the aid of low-pressure plasma spraying (NDPS method), and the MCrAlY layer is simultaneously compacted on the surface. In addition, the method is reproducible with regard to an improvement in the average roughness value and can also be used in the case of components of complex design.

Als Strahlpartikel werden vorzugsweise Kugeln mit einem mittleren Strahlpartikeldurchmesser von höchstens 0,2 mm aus Stahlguß, arondiertem Stahldraht, Zirkoniumoxid, Aluminiumoxid oder Glas eingesetzt. Derartige Kugeln haben den Vorteil einer weiteren Mittenrauhwertverminderung. Kugeln mit einem mittleren Strahlpartikeldurchmesser unter 50µm zeigen zumindest für MCrAlY-Schichten keine weiteren Mittenrauhwertverbesserung.Balls with a mean blasting particle diameter of at most 0.2 mm made of cast steel, aronded steel wire, zirconium oxide, aluminum oxide or glass are preferably used as blasting particles. Such balls have the advantage of further reducing the average roughness. Spheres with an average beam particle diameter of less than 50 µm show no further improvement in the average roughness value, at least for MCrAlY layers.

Eine bevorzugte Durchführung des Verfahrens sieht vor, daß die Schichtoberfläche in kritischen Bauteilbereichen an vorzugsweise geringen Krümmungsradien mit Deckungsgraden über 600% und stark verminderter Strahlintensität kugelgestrahl wird. Dieser hohe Deckunsgrad bei gleichzeitig stark verminderter Strahlintensität hat den Vorteil, einer Kombination aus Mikroverformung und Abrasion, die äußerst schonend diese kritischen Bauteilbereiche glättet.A preferred implementation of the method provides that the layer surface is shot-peened in critical component areas at preferably low radii of curvature with degrees of coverage over 600% and a greatly reduced beam intensity. This high degree of coverage combined with a greatly reduced beam intensity has the advantage of a combination of micro-deformation and abrasion that gently smoothes these critical component areas.

Vorzugsweise wird das Verfahren für Schaufelblattoberflächen von Hochdruckturbinenschaufeln angewandt. Dabei wird die MCrAlY-Schicht sowohl auf der Schaufelvorderkante als auch auf der noch stärker gekrümmten Schaufelhinterkante geglättet, ohne daß ein Schichtdickenunterschied auftritt.The method is preferably used for airfoil surfaces of high-pressure turbine blades. The MCrAlY layer is smoothed both on the front edge of the blade and on the even more curved rear edge of the blade without a difference in layer thickness occurring.

Das folgende Beispiel und die zugehörigen Figuren zeigen eine bevorzugte Durchführung und Ausbildung des Verfahrens.The following example and the associated figures show a preferred implementation and development of the method.

Beispiel 1 listet die Kugelstrahlparameter auf,

Fig. 1
zeigt eine Rasterelektronenmikroskopaufnahme von einer MCrAlY-Schicht nach einem Niederdruckplasmaspritzen,
Fig. 2
zeigt eine Rasterelektronenmikroskopaufnahme von der MCrAlY-Schicht nach einem Kugelstrahlen,
Fig. 3
zeigt einen Querschliff einer beschichteten und kugelgestrahlten Hochdruckturbinenschaufel im Bereich der Eintrittskante und
Fig. 4
zeigt einen Querschliff der beschichteten und kugelgestrahlten Hochdruckturbinenschaufeln im Bereich der Austrittskante.
Example 1 lists the shot peening parameters
Fig. 1
1 shows a scanning electron microscope image of an MCrAlY layer after low-pressure plasma spraying,
Fig. 2
shows a scanning electron microscope image of the MCrAlY layer after shot peening,
Fig. 3
shows a cross section of a coated and shot peened high pressure turbine blade in the area of the leading edge and
Fig. 4
shows a cross section of the coated and shot-blasted high-pressure turbine blades in the area of the trailing edge.

Beispiel 1example 1

Eine Schaufelblattoberfläche einer Hochdruckturbinenschaufel mit einer Schaufelblatthöhe von 42 mm und einer Schaufelblattbreite von 20 mm wird mit einer CoNiCrAlY-Schicht mittels Niederdruckplasmaspritzverfahren beschichtet. Der gemessene Mittenrauhwert liegt bei 4,77µm. Die Oberfläche dieser Hochdruckturbinenschaufel wird anschließend in einer Überdruckdüsenstrahlanlage mit Glasperlen eines mittleren Strahlpartikeldurchmessers von 0,12 mm kugelgestrahlt. Dazu wird die Strahlintensität auf 0,23 mm Almen N eingestellt und ein Deckungsgrad von 800% gefahren. Als Ergebnis einer Schichtverdichtung und eines Schichtabtrags wird eine gleichmäßige Schichtabnahme von maximal 20µm sowohl auf der Schaufelblattfläche als auch im Bereich der Eintrittskante und der Austrittskante gemessen. Der Mittenrauhwert ist auf 1,37µm verbessert.An airfoil surface of a high-pressure turbine blade with an airfoil height of 42 mm and an airfoil width of 20 mm is coated with a CoNiCrAlY layer by means of low-pressure plasma spraying. The measured average roughness value is 4.77 µm. The surface of this high-pressure turbine blade is then shot-peened in an overpressure nozzle blasting system with glass beads with an average blasting particle diameter of 0.12 mm. For this purpose, the beam intensity is set to 0.23 mm Almen N and a degree of coverage of 800% is achieved. As a result of a layer compression and a layer removal, a uniform layer decrease of maximum 20 µm is measured both on the airfoil surface and in the area of the leading edge and the trailing edge. The mean roughness value has been improved to 1.37 µm.

Fig. 1 zeigt eine Rasterelektronenmikroskopaufnahme von einer MCrAlY-Schicht nach einem Niederdruckplasmaspritzen, mit einer Rauhtiefe von 42,3µm und einem Mittenrauhwert von 4,77µm.1 shows a scanning electron microscope image of an MCrAlY layer after low-pressure plasma spraying, with a roughness depth of 42.3 μm and a mean roughness value of 4.77 μm.

Fig. 2 zeigt eine Rasterelektronenmikroskopaufnahme von dergleichen CoNiCrAlY-Schicht nach einem Kugelstrahlen mit den Verfahrensparametern entsprechend Beispiel 1. Die Rauhtiefe hat sich um mehr als das 4-fache auf 7,93 verbessert und der Mittenrauhwert wurde auf 1,37µm vermindert.2 shows a scanning electron microscope image of the same CoNiCrAlY layer after shot peening with the process parameters corresponding to example 1. The roughness depth has improved more than 4-fold to 7.93 and the average roughness value has been reduced to 1.37 μm.

Fig. 3 zeigt einen Querschliff einer beschichteten und kugelgestrahlten Hochdruckturbinenschaufel im Bereich der Eintrittskante (1). Deutlich ist die Grenze (2) zwischen CoNiCrAlY-Schicht (3) und Schaufelgrundmaterial (4) zu erkennen. Selbst die Eintrittskantenspitze (5) wird von der geglätteten CoNiCrAlY-Schicht (3) nachgebildet und nicht eingeebnet.Fig. 3 shows a cross section of a coated and shot-peened High-pressure turbine blade in the area of the leading edge (1). The boundary (2) between the CoNiCrAlY layer (3) and the blade base material (4) can be clearly seen. Even the leading edge tip (5) is simulated by the smoothed CoNiCrAlY layer (3) and is not leveled.

Fig. 4 zeigt einen Querschliff der beschichteten und kugelgestrahlten Hochdruckturbinenschaufeln im Bereich der Austrittskante (6). Deutlich ist die Grenze (2) zwischen CoNiCrAlY-Schicht (3) und Schaufelgrundmaterial (4) zu erkennen. Auch die wesentlich stärker gekrümmte Austrittskante (6) wird von der geglätteten CoNiCrAlY-Schicht (3) nachgebildet.Fig. 4 shows a cross section of the coated and shot-blasted high-pressure turbine blades in the area of the trailing edge (6). The boundary (2) between the CoNiCrAlY layer (3) and the blade base material (4) can be clearly seen. The smoothed CoNiCrAlY layer (3) also reproduces the much more curved trailing edge (6).

Claims (3)

Verfahren zur Oberflächenbehandlung von Bauteilen mittels Kugelstrahlen, dadurch gekennzeichnet, daß auf die Bauteiloberfläche zunächst eine MCrAlY-Schicht als Oxidations- und Heißgaskorrisionsschicht aufgebracht wird und anschließend die Schichtoberfläche mit Partikelstrahlen einer Strahlintensität von höchstens 0,15 mm Almen A, einem Deckungsgrad von mindestens 400 % und einem mittleren Strahlpartikeldurchmesser von höchstens 0,5 mm kugelgestrahlt und dabei geglättet wird.Process for the surface treatment of components by means of shot peening, characterized in that an MCrAlY layer is first applied to the component surface as an oxidation and hot gas correction layer and then the layer surface with particle beams with a beam intensity of at most 0.15 mm Almen A, a coverage of at least 400% and an average shot particle diameter of at most 0.5 mm is shot peened and smoothed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schichtoberfläche in kritischen Bauteilbereichen an vorzugsweise geringen Krümmungsradien mit Deckungsgraden über 600% und stark verminderter Strahlintensität kugelgestrahlt wird.A method according to claim 1, characterized in that the layer surface is shot-peened in critical component areas at preferably low radii of curvature with degrees of coverage over 600% and greatly reduced beam intensity. Anwendung des Verfahrens nach einem der Ansprüche 1 oder 2 für Schaufelblattoberflächen von Hochdruckturbinenschaufeln.Application of the method according to one of claims 1 or 2 for airfoil surfaces of high-pressure turbine blades.
EP91121460A 1990-12-21 1991-12-14 Method for the surface-treatment of parts Expired - Lifetime EP0492323B1 (en)

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DE4041103 1990-12-21
DE4041103A DE4041103A1 (en) 1990-12-21 1990-12-21 METHOD FOR TREATMENT OF COMPONENTS

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EP0492323A3 EP0492323A3 (en) 1992-10-07
EP0492323B1 EP0492323B1 (en) 1995-09-20

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Cited By (11)

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EP0559330A1 (en) * 1992-02-18 1993-09-08 Johnson Matthey Public Limited Company Coated article
FR2694575A1 (en) * 1992-08-08 1994-02-11 Mtu Muenchen Gmbh Process for the treatment of coatings in MCrAlZ.
EP0638652A1 (en) * 1993-08-12 1995-02-15 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Process for hardening metal workpieces
EP1101827A1 (en) * 1999-11-18 2001-05-23 Snecma Moteurs Process for ultrasonic shotpeening large annular surfaces of thinwalled workpieces
GB2375725A (en) * 2001-05-26 2002-11-27 Siemens Ag Blasting metallic surfaces
US7028378B2 (en) 2000-10-12 2006-04-18 Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces Method of shot blasting and a machine for implementing such a method
FR2883216A1 (en) * 2005-03-21 2006-09-22 Snecma Moteurs Sa Prestressing metal parts, especially turbine components, by shot-blasting, by projecting spheres against part surface having protective coating, e.g. of phenolic resin, to prevent roughening
EP1805344B1 (en) * 2004-10-16 2011-03-16 MTU Aero Engines AG Method for producing a component covered with a wear-resistant coating
WO2012022298A3 (en) * 2010-08-14 2012-06-07 Mtu Aero Engines Gmbh Method and device for removing a layer from a surface of a body
EP2604377A1 (en) * 2011-12-15 2013-06-19 Siemens Aktiengesellschaft Method for laser processing a laminated piece with ceramic coating
GB2562382A (en) * 2017-05-12 2018-11-14 Safran Nacelles Ltd Method of coating a workpiece

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DE19743579C2 (en) * 1997-10-02 2001-08-16 Mtu Aero Engines Gmbh Thermal barrier coating and process for its manufacture
DE10123554B4 (en) * 2001-03-27 2011-02-03 Widia Gmbh Method for increasing the compressive stress or for reducing the inherent tensile stress of a CVD, PCVD or PVD layer and cutting insert for machining
DE102011085143A1 (en) * 2011-10-25 2013-04-25 Mtu Aero Engines Gmbh K3 coating process for the formation of well-adhering and crack-resistant coatings and corresponding coating component
DE102022116082A1 (en) 2022-06-28 2023-12-28 Voestalpine Metal Forming Gmbh Process for conditioning the surfaces of heat-treated galvanized steel sheets

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437933A (en) * 1992-02-18 1995-08-01 Johnson Matthey Public Limited Company Coated ceramic article
EP0559330A1 (en) * 1992-02-18 1993-09-08 Johnson Matthey Public Limited Company Coated article
FR2694575A1 (en) * 1992-08-08 1994-02-11 Mtu Muenchen Gmbh Process for the treatment of coatings in MCrAlZ.
EP0638652A1 (en) * 1993-08-12 1995-02-15 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Process for hardening metal workpieces
EP1101827A1 (en) * 1999-11-18 2001-05-23 Snecma Moteurs Process for ultrasonic shotpeening large annular surfaces of thinwalled workpieces
WO2001036692A1 (en) * 1999-11-18 2001-05-25 Snecma Moteurs Method for ultrasonic shot blasting of large-dimensioned annular surfaces on thin parts workpieces
FR2801322A1 (en) * 1999-11-18 2001-05-25 Snecma METHOD FOR ULTRASONIC BLASTING OF LARGE DIMENSIONAL ANNULAR SURFACES ON THIN PARTS
US6289705B1 (en) 1999-11-18 2001-09-18 Snecma Moteurs Method for the ultrasonic peening of large sized annular surfaces of thin parts
US7028378B2 (en) 2000-10-12 2006-04-18 Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces Method of shot blasting and a machine for implementing such a method
GB2375725A (en) * 2001-05-26 2002-11-27 Siemens Ag Blasting metallic surfaces
EP1805344B1 (en) * 2004-10-16 2011-03-16 MTU Aero Engines AG Method for producing a component covered with a wear-resistant coating
US8920881B2 (en) 2004-10-16 2014-12-30 MTU Aero Engines AG Method for producing a component covered with a wear-resistant coating
FR2883216A1 (en) * 2005-03-21 2006-09-22 Snecma Moteurs Sa Prestressing metal parts, especially turbine components, by shot-blasting, by projecting spheres against part surface having protective coating, e.g. of phenolic resin, to prevent roughening
WO2012022298A3 (en) * 2010-08-14 2012-06-07 Mtu Aero Engines Gmbh Method and device for removing a layer from a surface of a body
US20130139852A1 (en) * 2010-08-14 2013-06-06 Mtu Aero Engines Gmbh Method and device for removing a layer from a surface of a body
US9333623B2 (en) 2010-08-14 2016-05-10 Mtu Aero Engines Gmbh Method and device for removing a layer from a surface of a body
EP2604377A1 (en) * 2011-12-15 2013-06-19 Siemens Aktiengesellschaft Method for laser processing a laminated piece with ceramic coating
GB2562382A (en) * 2017-05-12 2018-11-14 Safran Nacelles Ltd Method of coating a workpiece

Also Published As

Publication number Publication date
EP0492323A3 (en) 1992-10-07
DE4041103A1 (en) 1992-07-02
DE59106539D1 (en) 1995-10-26
EP0492323B1 (en) 1995-09-20

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