EP0048083B1 - Procédé pour le traitement de la surface d'un alliage réfractaire - Google Patents

Procédé pour le traitement de la surface d'un alliage réfractaire Download PDF

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Publication number
EP0048083B1
EP0048083B1 EP19810303264 EP81303264A EP0048083B1 EP 0048083 B1 EP0048083 B1 EP 0048083B1 EP 19810303264 EP19810303264 EP 19810303264 EP 81303264 A EP81303264 A EP 81303264A EP 0048083 B1 EP0048083 B1 EP 0048083B1
Authority
EP
European Patent Office
Prior art keywords
heat
alloy
resistant alloy
surface treatment
treatment method
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
EP19810303264
Other languages
German (de)
English (en)
Other versions
EP0048083A1 (fr
Inventor
Yoshio Takasago Technical Institute Harada
Masaharu Takasago Tech. Institute Nakamori
Keigo Takasago Technical Institute Saika
Ichiro Takasago Technical Institute Fukue
Shigefumi Takasago Tech. Institute Takaoka
Atsushi Takasago Techn. Institute Maekawa
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0048083A1 publication Critical patent/EP0048083A1/fr
Application granted granted Critical
Publication of EP0048083B1 publication Critical patent/EP0048083B1/fr
Expired legal-status Critical Current

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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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface

Definitions

  • This invention relates to a method of surface treatment of a member of heat-resistant alloy for use in turbines, blowers, boilers or the like to render it resistant to high temperature oxidation as well as to high temperature corrosion.
  • the present invention is directed to-providing a method which overcomes the deficiencies of these previous methods.
  • a method of applying a protective coating to a heat resistant alloy part of a kind having at least at its surface an inhomogeneous morphology which involves depositing a first coating of Ni with some Cr (namely 5-15% by weight Cr) for example, it is suggested, by plasma spraying to form a first layer, and then depositing a second coating for example, it is suggested, by slurry aluminising to form a second, aluminised, layer, and thereafter heat treating the part, whereby, it is said, the aluminised layer is caused to diffuse completely through the first layer and into the base material.
  • the present invention provides a surface treatment method of a heat-resistant alloy comprising the steps of plasma spraying a Ni-Cr alloy on to the surface of a member made of heat-resistant alloy, applying thereon a coating slurry containing aluminium particles and then heat treating the coated member for diffusion penetration which is characterised in that the Ni-Cr alloy comprises 50Ni-50Cr alloy and in that the coating slurry contains additionally Si0 2 particles.
  • the surface treatment method of the present invention provides the characterizing features as illustrated in Table 1 in comparison with some conventional methods.
  • a substrate of Udimet 520 (Registered Trade Mark) comprising by weight 19% Cr, 12% Co, 6% Mo, 3% Ti, 2% Al, 1% Fe, Ni-Bal, and widely used as a super-alloy for the hot parts of a gas turbine, was treated in the following sequence: -
  • step (4) could be carried out using a mixture of AI with Si0 2 in a mixing ratio by weight of 80/20 or 50/50.
  • step (6) could be carried out using a vacuum furnace in place of the hydrogen furnace.
  • Udimet 520 has been treated by the method of the invention by way of example, similar excellent results can also be obtained when treating the surfaces of other substrates such Ni-based alloy, Co-based alloy and stainless steel.
  • the coated surface of the substrate provided by the above described method had an extremely smooth and flat surface and AI and Si from the second layer sufficiently penetrated by diffusion into the first layer, thereby completely eliminating the fine pores of the first layer.
  • the composite coating was rendered wholly homogeneous.
  • AI since the melting point of AI is 660°C, AI was fused due to the heat-treatment and penetrated into the fine pores, thus presumably rendering the surface smooth and flat. Further, it was confirmed that a part of AI and Si reached and was diffused also into the substrate.
  • Table 2 illustrates the results of fly-ash errosion resistance test, corrosion resistance test, and practical application test using gas turbine blades, each test being applied to a member treated by a method in accordance with the present invention and a member treated-by a conventional method.
  • the composite coating produced by the method in accordance with the present invention had a better performance in comparison with that produced by the conventional method in the fly-ash errosion resistance test and the corrsion resistance test.
  • the coated blade produced using the method of the present invention exhibited the tendency that the deposition amount of the fuel ash become smaller.
  • the composite coating produced by the method of the present invention did not suffer peeling or cracking and had extremely good adhesion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Claims (4)

1. Procédé pour le traitement de surface d'un alliage réfractaire, au cours duquel on applique par projection au plasma un alliage Ni-Cr sur la surface d'un élément fait de l'alliage réfractaire, on l'enduit d'un coulis de revêtement renfermant des particules d'aluminium, puis on traite thermiquement l'élément ainsi revêtu de manière à produire une pénétration par diffusion, caractérisé en ce que l'alliage Ni-Cr est un alliage 50 Ni-50 Cr, et en ce que ledit coulis de revêtement renferme en outre des particules de Si02.
2. Procédé selon la revendication 1, caractérisé en ce que lesdites particules d'aluminium et de Si02 ont une taille comprise approximativement entre 0,1 pm et 1 pm.
3. Procédé selon la revendication 1, caractérisé en ce que le traitement thermique comporte une étape de maintien de l'élément revêtu à environ 1080°C.
4. Procédé selon la revendication 3, dans lequel ladite étape du traitement thermique est précédée d'une étape de chauffage pour faire évacuer le liquide du coulis, suivie d'un traitement thermique à environ 330°C.
EP19810303264 1980-09-17 1981-07-16 Procédé pour le traitement de la surface d'un alliage réfractaire Expired EP0048083B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP128738/80 1980-09-17
JP12873880A JPS5754282A (ja) 1980-09-17 1980-09-17 Tainetsugokinnohyomenshorihoho

Publications (2)

Publication Number Publication Date
EP0048083A1 EP0048083A1 (fr) 1982-03-24
EP0048083B1 true EP0048083B1 (fr) 1986-03-05

Family

ID=14992227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810303264 Expired EP0048083B1 (fr) 1980-09-17 1981-07-16 Procédé pour le traitement de la surface d'un alliage réfractaire

Country Status (4)

Country Link
EP (1) EP0048083B1 (fr)
JP (1) JPS5754282A (fr)
CA (1) CA1173305A (fr)
DE (1) DE3173970D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58177458A (ja) * 1982-04-12 1983-10-18 Sumitomo Metal Ind Ltd ニツケル、クロム合金拡散浸透処理法
JPS63487A (ja) * 1986-06-19 1988-01-05 Tookaro Kk 含クロム溶射金属被覆層上に酸化皮膜を有する耐熱部材
US5789077A (en) 1994-06-27 1998-08-04 Ebara Corporation Method of forming carbide-base composite coatings, the composite coatings formed by that method, and members having thermally sprayed chromium carbide coatings
DE19824792B4 (de) * 1998-06-03 2005-06-30 Mtu Aero Engines Gmbh Verfahren zum Herstellen einer Haftschicht für eine Wärmedämmschicht
US6294261B1 (en) * 1999-10-01 2001-09-25 General Electric Company Method for smoothing the surface of a protective coating
US20060057418A1 (en) 2004-09-16 2006-03-16 Aeromet Technologies, Inc. Alluminide coatings containing silicon and yttrium for superalloys and method of forming such coatings
WO2007067185A2 (fr) * 2004-12-13 2007-06-14 Aeromet Technologies, Inc. Composants de moteur a turbine avec revetements protecteurs contenant du silicium et du chrome sans aluminure et procedes de fabrication de tels revetements protecteurs sans aluminure
US9133718B2 (en) 2004-12-13 2015-09-15 Mt Coatings, Llc Turbine engine components with non-aluminide silicon-containing and chromium-containing protective coatings and methods of forming such non-aluminide protective coatings
CN109868447B (zh) * 2017-12-01 2022-03-25 通用电气公司 用于降低表面粗糙度的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837894A (en) * 1972-05-22 1974-09-24 Union Carbide Corp Process for producing a corrosion resistant duplex coating
CA1004964A (en) * 1972-05-30 1977-02-08 Union Carbide Corporation Corrosion resistant coatings and process for making the same
JPS5635749B2 (fr) * 1973-01-23 1981-08-19
US3989863A (en) * 1975-07-09 1976-11-02 The International Nickel Company, Inc. Slurry coating process
GB2009251B (en) * 1977-12-01 1982-08-18 Rolls Royce Coated metal part and the method of applying coating

Also Published As

Publication number Publication date
EP0048083A1 (fr) 1982-03-24
DE3173970D1 (en) 1986-04-10
JPH0132309B2 (fr) 1989-06-30
JPS5754282A (ja) 1982-03-31
CA1173305A (fr) 1984-08-28

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