EP1970461A1 - Pièce de turbine dotée d'une couche d'isolation thermique - Google Patents

Pièce de turbine dotée d'une couche d'isolation thermique Download PDF

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Publication number
EP1970461A1
EP1970461A1 EP07005301A EP07005301A EP1970461A1 EP 1970461 A1 EP1970461 A1 EP 1970461A1 EP 07005301 A EP07005301 A EP 07005301A EP 07005301 A EP07005301 A EP 07005301A EP 1970461 A1 EP1970461 A1 EP 1970461A1
Authority
EP
European Patent Office
Prior art keywords
iron
weight
based alloy
layer
powder
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Withdrawn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
EP07005301A
Other languages
German (de)
English (en)
Inventor
Jochen Dr. Barnikel
Friedhelm Schmitz
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP07005301A priority Critical patent/EP1970461A1/fr
Priority to PCT/EP2008/053021 priority patent/WO2008110607A1/fr
Priority to JP2009553149A priority patent/JP2010522823A/ja
Priority to CN200880008098A priority patent/CN101631888A/zh
Priority to EP08717765A priority patent/EP2132350A1/fr
Publication of EP1970461A1 publication Critical patent/EP1970461A1/fr
Withdrawn legal-status Critical Current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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/30—Application in turbines
    • F05B2220/301—Application in turbines in steam turbines

Definitions

  • the invention relates to an iron-based alloy according to claim 1, a protective layer according to claim 10, a layer system according to claim 11 and a method for producing the iron-based layer according to claim 16.
  • MCrAlY Protective layers for metallic components intended to increase their corrosion resistance and / or oxidation resistance are known in the art in large numbers. Most of these protective layers are known under the collective name MCrAlY, where M stands for at least one of the elements from the group consisting of iron, cobalt and nickel and further components chromium, aluminum and yttrium.
  • Thermal barrier coatings that are applied to turbine components, for example, in the EP 1 541 810 A1 described.
  • the effort to increase the inlet temperatures of the live steam in steam turbines is of great importance, because to achieve optimum thermal efficiency, the inlet temperature of the live steam is an important determinant.
  • Due to the use of specially developed ferritic base materials for thermally highly stressed turbine components steam temperatures of approx. 620 ° C can currently be achieved.
  • thermal barrier coatings on these base materials a fresh steam inlet temperature should be increased or the use of cost-effective materials should be made possible at the same steam temperature.
  • a protective layer In order to achieve sufficient resistance to oxidation and corrosion of the ferritic base materials, protective coatings must be used. In addition to the sufficient chemical resistance of a protective layer, a protective layer must also be resistant to good mechanical properties Properties, not least in view of the mechanical interaction between the protective layer and the base material, have. In particular, the protective layer must be sufficiently ductile in order to be able to follow any deformations of the base material and not to break, since in this way points of attack for oxidation and corrosion would be created.
  • the adhesive layer ensures good adhesion of the thermal barrier coating to the base material and, on the other hand, protection of the base material against oxidation and corrosion.
  • top-coating In order to protect the thermal barrier coating against erosion and corrosion, a further protective layer can be arranged on the thermal barrier coating, which is referred to as top-coating.
  • Adhesive layers and / or top coatings made of Ni-Cr 80/20 and / or MCrAlY are particularly suitable for the base materials used in steam turbine construction.
  • these abovementioned adhesive layers are suitable for base materials such as, for example, Ni-base alloys, where suitability above 700 ° C. appears possible.
  • a disadvantage of the use of these adhesive layers and / or top coatings is that their thermal expansion coefficient compared to the base materials or thermal barrier coatings is relatively high, which means that stresses and / or strains can lead to undesirable cracking.
  • the object of the invention is therefore to provide a suitable material for the adhesive layer and / or top coatings.
  • the object is also achieved by a method for producing a layer according to claim 16 and / or 19.
  • the invention is based inter alia on the finding that the proportion of chromium content on the chemical and physical properties of the adhesive layer and / or the topcoat depends substantially on the chromium content, wherein the aluminum content plays an essential role.
  • the invention is characterized in that the thermal spraying a spray powder is used with a chromium content of 25 wt .-% to 35 wt .-% chromium, whereby a chromium content of 15 wt .-% - 30 wt. % is achieved in the iron-based layer after the manufacturing process. It has been determined by experiments that the chromium content of the spray powder falls by up to 10% by weight during the manufacturing process.
  • an aluminum content of 1% by weight to 5% by weight of aluminum can be added to the sprayed powder.
  • the lowest possible silicon content ⁇ 0.2% by weight is used.
  • the elements Ce, Y and / or Hf can be used.
  • FIG. 1 shows a first embodiment of an inventively designed component.
  • the component 1 could, for example, be an inflow region of a turbine, in particular a steam turbine, and has a base material 4 and a thermal insulation layer 7 applied thereto.
  • the thermal insulation layer 7 may be formed from a ceramic material.
  • the thermal barrier coating 7 may be formed as a ceramic thermal barrier coating of zirconium oxide, wherein the zirconium oxide is unstabilized, partially stabilized or fully stabilized by yttrium oxide and / or magnesium oxide.
  • the ceramic thermal barrier coating may be titanium oxide, the thickness being between 0.1 mm and 2 mm.
  • the ceramic thermal barrier coating 7 by thermal spraying such as atmospheric plasma spraying (APS) and by chemical or physical coating methods such. As CVD or PVD can be used.
  • thermal spraying such as atmospheric plasma spraying (APS)
  • APS atmospheric plasma spraying
  • CVD or PVD chemical or physical coating methods
  • FIG. 2 shows a further embodiment of the inventively constructed component 1.
  • the difference between the FIG. 1 and the FIG. 2 is that between the base material 4 and the thermal barrier coating 7 at least one adhesive layer 10, comprising an iron-based alloy is formed.
  • the adhesive layer 10 serves firstly to protect against corrosion and / or oxidation of the base material and secondly to better bond the ceramic thermal barrier coating 7 to the base material 4. This is particularly the case when the ceramic thermal barrier coating and the base material consist of a metal.
  • the iron-based adhesive layer in this case comprises 15 wt .-% to 30 wt .-% chromium. Furthermore, the iron-based alloy comprises 1.5 wt% to 2.5 wt% aluminum and less than 0.2 wt% silicon.
  • the iron-based adhesive layer may comprise the element Y, the element hafnium and the element Cer with the following proportions by weight: 0.1 wt.% To 0.7 wt.% Y 0.1% by weight to 0.5% by weight of cerium 0.1 wt .-% to 0.5 wt .-% hafnium have.
  • the thermal expansion coefficients of the base material 4 and the adhesive layer 10 are thereby very well matched or even equal, so that there is no or only low thermal stresses between the base material 4 and the adhesive layer 10, the chipping and / or cracking the adhesive layer 10 or could cause the thermal barrier coating. This is particularly important because in ferritic materials often no heat treatment for diffusion bonding is performed, but the thermal barrier coating 7 largely or only by adhesion to the base material adheres.
  • the base material 4 may be a ferritic base alloy, a steel, in particular a 1% CrMoV steel or a 9% -13% chromium steel. Further advantageous ferritic substrates 4 of the component 1 consist of a 1% - 2% chromium steel for waves: such.
  • the component 1 is manufactured by thermal spraying, using iron-based powder comprising 25% by weight to 35% by weight of chromium.
  • oxygen uptake during the injection process leads to a more or less pronounced formation of Cr oxide, which in turn results in a strong localized Cr depletion up to a fraction below 12%.
  • the use of the iron-based powder according to the invention ensures that the iron-based alloy has a proportion of 15% by weight to 30% by weight of chromium after the production process.
  • the manufacturing process is improved in that aluminum is added to the powder with 1 wt% to 5 wt% aluminum. After thermal spraying, an aluminum content of 1.5 wt.% To 3 wt.% Aluminum in the iron-based alloy remains.
  • the process uses a powder comprising 28% to 30% by weight of chromium, aluminum being added to the powder with 2.5 wt .-% to 3.5 wt .-% aluminum.
  • the powder in this case has less than 0.2 wt .-% silicon.
  • the method of producing the iron-based layer using thermal spraying can be improved so that the iron-based powder consists of 25 wt% to 35 wt% of chromium.
  • the powder may consist of 25 wt% to 35 wt% chromium and 1 wt% to 5 wt% aluminum.
  • the iron-based powder may consist of 28% to 30%, 2.5% to 3.5%, by weight, aluminum and silicon less than 0.2% by weight.
  • FIG. 3 shows a further embodiment of the inventively designed component.
  • the erosion protection layer 13 can also be referred to as a top coating. It consists in particular of a metal or a metal alloy and protects the component from erosion and / or wear, as is the case in particular in steam turbine power plants which have a scaling in the superheated steam region, where average flow velocities of about 50 m / sec and pressures of up to 350 bar occur.
  • the erosion protection layer 13 may have substantially the same chemical elements as the adhesion layer 10. This achieves the advantage that the thermal stresses between a thermal barrier coating and the erosion control layer 13 are minimal.
  • an adhesive layer 10 may be present.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Powder Metallurgy (AREA)
EP07005301A 2007-03-14 2007-03-14 Pièce de turbine dotée d'une couche d'isolation thermique Withdrawn EP1970461A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP07005301A EP1970461A1 (fr) 2007-03-14 2007-03-14 Pièce de turbine dotée d'une couche d'isolation thermique
PCT/EP2008/053021 WO2008110607A1 (fr) 2007-03-14 2008-03-13 Composant de turbine avec couche d'isolation thermique
JP2009553149A JP2010522823A (ja) 2007-03-14 2008-03-13 断熱層付きタービン部品
CN200880008098A CN101631888A (zh) 2007-03-14 2008-03-13 具有绝热层的涡轮机构件
EP08717765A EP2132350A1 (fr) 2007-03-14 2008-03-13 Composant de turbine avec couche d'isolation thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07005301A EP1970461A1 (fr) 2007-03-14 2007-03-14 Pièce de turbine dotée d'une couche d'isolation thermique

Publications (1)

Publication Number Publication Date
EP1970461A1 true EP1970461A1 (fr) 2008-09-17

Family

ID=38050293

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07005301A Withdrawn EP1970461A1 (fr) 2007-03-14 2007-03-14 Pièce de turbine dotée d'une couche d'isolation thermique
EP08717765A Withdrawn EP2132350A1 (fr) 2007-03-14 2008-03-13 Composant de turbine avec couche d'isolation thermique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08717765A Withdrawn EP2132350A1 (fr) 2007-03-14 2008-03-13 Composant de turbine avec couche d'isolation thermique

Country Status (4)

Country Link
EP (2) EP1970461A1 (fr)
JP (1) JP2010522823A (fr)
CN (1) CN101631888A (fr)
WO (1) WO2008110607A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2309017A1 (fr) * 2009-10-09 2011-04-13 Siemens Aktiengesellschaft Composant de turbine à vapeur doté d'un revêtement de protection
EP2381005A1 (fr) * 2010-04-22 2011-10-26 Siemens Aktiengesellschaft Système de couche pour composants de turbine
EP2381006A1 (fr) * 2010-04-22 2011-10-26 Siemens Aktiengesellschaft Système de couche pour un composant de turbine
EP2431572A1 (fr) * 2010-09-21 2012-03-21 Siemens Aktiengesellschaft Revêtement de barrière thermique pour un élément de turbine à vapeur
CN109162774A (zh) * 2018-08-30 2019-01-08 江苏华强新能源科技有限公司 一种用于燃气轮机排气扩散段的内保温板
CN113549865A (zh) * 2021-07-27 2021-10-26 黑龙江省农业机械工程科学研究院 一种铁基合金粉末、棱纹型仿生减阻耐磨结构及其制备方法与应用

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9945036B2 (en) * 2011-03-22 2018-04-17 General Electric Company Hot corrosion-resistant coatings and components protected therewith
EP2650398B8 (fr) * 2012-04-11 2015-05-13 Oerlikon Metco AG, Wohlen Poudre mouillable avec liaison à base de fer super-ferritique, ainsi qu'un substrat, notamment un disque de frein avec une couche de diffusion thermique
CN102676972A (zh) * 2012-05-30 2012-09-19 重庆国际复合材料有限公司 铂铑合金漏板的处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101713A (en) * 1977-01-14 1978-07-18 General Electric Company Flame spray oxidation and corrosion resistant superalloys
DE10002933C1 (de) * 2000-01-25 2001-07-05 Krupp Vdm Gmbh Verfahren zur Herstellung einer formstabilen Eisen-Chrom-Aluminium-Folie sowie Verwendung derselben
DE10310865B3 (de) * 2003-03-11 2004-05-27 Thyssenkrupp Vdm Gmbh Eisen-Chrom-Aluminium-Legierung
EP1541810A1 (fr) * 2003-12-11 2005-06-15 Siemens Aktiengesellschaft Utilisation de revêtement de barrière thermique pour un élément d'une turbine à vapeur et une turbine à vapeur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101713A (en) * 1977-01-14 1978-07-18 General Electric Company Flame spray oxidation and corrosion resistant superalloys
DE10002933C1 (de) * 2000-01-25 2001-07-05 Krupp Vdm Gmbh Verfahren zur Herstellung einer formstabilen Eisen-Chrom-Aluminium-Folie sowie Verwendung derselben
DE10310865B3 (de) * 2003-03-11 2004-05-27 Thyssenkrupp Vdm Gmbh Eisen-Chrom-Aluminium-Legierung
EP1541810A1 (fr) * 2003-12-11 2005-06-15 Siemens Aktiengesellschaft Utilisation de revêtement de barrière thermique pour un élément d'une turbine à vapeur et une turbine à vapeur

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
T. B. MASSALSKI: "Binary alloy phase diagrams - volume 1", 1990, ASM INTERNATIONAL, XP002435437 *
T.B. MASSALSKI: "Binary alloy phase diagrams - volume 2", 1990, ASM INTERNATIONAL, XP002435436 *
Y. TAMARIN: "Protective coatings for turbine blades", 2002, ASM INTERNATIONAL, MATERIALS PARK, OHIO, XP002435435 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2309017A1 (fr) * 2009-10-09 2011-04-13 Siemens Aktiengesellschaft Composant de turbine à vapeur doté d'un revêtement de protection
WO2011042500A1 (fr) * 2009-10-09 2011-04-14 Siemens Aktiengesellschaft Élément de turbine à vapeur muni d'un revêtement protecteur
EP2381005A1 (fr) * 2010-04-22 2011-10-26 Siemens Aktiengesellschaft Système de couche pour composants de turbine
EP2381006A1 (fr) * 2010-04-22 2011-10-26 Siemens Aktiengesellschaft Système de couche pour un composant de turbine
EP2431572A1 (fr) * 2010-09-21 2012-03-21 Siemens Aktiengesellschaft Revêtement de barrière thermique pour un élément de turbine à vapeur
CN109162774A (zh) * 2018-08-30 2019-01-08 江苏华强新能源科技有限公司 一种用于燃气轮机排气扩散段的内保温板
CN109162774B (zh) * 2018-08-30 2021-05-18 江苏华强新能源科技有限公司 一种用于燃气轮机排气扩散段的内保温板
CN113549865A (zh) * 2021-07-27 2021-10-26 黑龙江省农业机械工程科学研究院 一种铁基合金粉末、棱纹型仿生减阻耐磨结构及其制备方法与应用
CN113549865B (zh) * 2021-07-27 2023-03-14 黑龙江省农业机械工程科学研究院 一种铁基合金粉末、棱纹型仿生减阻耐磨结构及其制备方法与应用

Also Published As

Publication number Publication date
JP2010522823A (ja) 2010-07-08
WO2008110607A1 (fr) 2008-09-18
CN101631888A (zh) 2010-01-20
EP2132350A1 (fr) 2009-12-16

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