EP0035377A1 - Alliages pour l'obtention de couches de liaison par projection thermique - Google Patents

Alliages pour l'obtention de couches de liaison par projection thermique Download PDF

Info

Publication number
EP0035377A1
EP0035377A1 EP81300805A EP81300805A EP0035377A1 EP 0035377 A1 EP0035377 A1 EP 0035377A1 EP 81300805 A EP81300805 A EP 81300805A EP 81300805 A EP81300805 A EP 81300805A EP 0035377 A1 EP0035377 A1 EP 0035377A1
Authority
EP
European Patent Office
Prior art keywords
bond
coat
aluminium
alloy
nickel
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.)
Ceased
Application number
EP81300805A
Other languages
German (de)
English (en)
Inventor
Gerald Robert Bell
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.)
Wall Colmonoy Ltd
Original Assignee
Wall Colmonoy 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 Wall Colmonoy Ltd filed Critical Wall Colmonoy Ltd
Publication of EP0035377A1 publication Critical patent/EP0035377A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • 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
    • C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic

Definitions

  • This invention relates to bond-coating alloys for thermal spraying and particularly to an alloy suitable for flame spraying in powder form onto a metal substrate to provide a bond-coat thereon.
  • bond-coats are required if the substrate is in the form of a thin section which would be distorted by grit-blasting or rough-machining.
  • Such bond-coats bond metallurgically to the substrate and are capable of repeated coating applications although they need be used in all cases for repeated coating applications. In this aspect they differ from so-called "self-bonding coatings" which are normally intended as single deposit coatings which show some measure of metallurgical bonding to a metallic substrate but are not necessarily suitable for use as bond-coats on metal substrates such as hardened steels. This specification is only concerned with bond-coats.
  • Such a bond- coat, sprayed on as a thin adherent layer, provides attachment for a subsequent, thicker, sprayed deposit .
  • the bond-coat material must be capable of adhering with sufficient strength to a, smooth machined surface of a substrate and this conventionally is achieved by ensuring that the temperature of the bond-coat particles issuing from the spraying apparatus remains high until they meet the substrate surface.
  • the additional heat necessary may be provided by an exothermic reaction between the bond coat material and oxygen in the spray flame in the case, for example, of an exothermic bond coat material such as molybdenum.
  • molybdenum When molybdenum is sprayed from a wire-spray gun it reacts with oxygen either in the air or in the flame to form a volatile oxide.
  • Composite materials containing or comprising nickel and aluminium, such as nickel coated aluminium powders, agglomerated nickel/aluminium powders and composite wires have been proposed for use as bond-coat materials but such materials are costly and/or in short supply. These materials, when sprayed, react to form nickel aluminide with the evolution of heat sufficient to promote metallurgical bonding at the interface. Powdered materials such as the above have been used also in association with other alloy powders to provide "self bonding" coatings, but such mixtures are not normally advocated as bond-coats.
  • the invention provides an alloy, suitable for flame spraying in powder form onto a metal substrate to provide a bond-coat thereon, which contains, by weight, from 2 to 30% aluminium, from 2 to 25% chromium, from 0 to 8% silicon, from 0 to 4% boron and from 0 to 6% iron, the balance, apart from impurities, being copper and/or nickel.
  • the alloy contains from 2 to 15% aluminium.
  • the alloy contains not less than 5% chromium. More preferably the alloy contains 6.0% aluminium, 8.5% chromium, 4.6% silicon and 49.0% copper, the balance, apart from impurities, being nickel.
  • a preferred alloy containing, by weight, 5% aluminium, 10% chromium, 5% silicon, and 45% copper, the balance, apart from impurities, being nickel.
  • a further preferred alloy contains, by weight, 8% aluminium, 4% chromium, 2% silicon, and 15% nickel, the balance, apart from impurities, being copper.
  • bond-coats were tested by means of a scratch test in which the bond-coatings where applied to steel samples approximately 50 mm x 50 mm x 10 mm in size and adhesion of the bond-coat was judged by observing the effects of scribing, down to the substrate, two lines approximately 3 mm apart.
  • the test samples were used in the as machined condition after degreasing with an organic solvent immediately prior to spraying. The samples were preheated only sufficiently to' prevent condensation of moisture on their surfaces and each material was sprayed in a rapid series of overlapping passes, two layers being applied, with the second being at right angles to the first to give a deposit thickness of approximately 0.25 mm.
  • Molybdenum powder sprayed with an oxidising flame produced a bond-coat with good cohesion and adhesion but spraying with a neutral or reducing flame gave a coating having virtually no adhesion.
  • Nickel aluminium composite proprietary powders were flame sprayed to produce bond-coatings with good cohesion and adhesion whereas nickel aluminium pre-alloyed powders when flame sprayed gave a coating with good cohesion but reduced adhesion.
  • a 90% copper, 10% aluminium alloy in pre-alloyed form provided a flame sprayed coating with adequate adhesion and best results were obtained with an oxidising flame.
  • Bond-coatings were then produced from an alloy of the invention in powder form. Satisfactory bonding and adhesion characteristics were obtained with alloys containing, by weight, from 2 to 30%, preferably from 2 to 15%, aluminium, from 2 to 25%, preferably from 5 to 25%, chromium, from 0 to 8% silicon, from 0 to 4% boron and 0 to 6% iron, the balance, apart from impurities, being copper and/or nickel.
  • a further preferred alloy composition according to the invention contained 6.0% aluminium, 8.5% chromium, 4.5% silicon and 49.5% copper, the balance, apart from impurities, being nickel.
  • Such alloys according to the invention produced bond-coatings with bond strengths comparable to that of unreacted nickel-aluminium composites but superior to that of well sprayed molybdenum or aluminium bronze materials.
  • An alloy according to the invention having the nominal composition given in the foregoing example, was used as a bond-coat for applying a coating of COLMONOY C290 (Trade Mark) having a nominal composition, by weight, of 13.3% chromium, 1.5% boron, 2.5% silicon, 0.4% carbon 37.0% nickel, with the balance, apart from impurities, being iron, to electric motor shafts and to an hydraulic ram.
  • the shafts were satisfactorily repaired in this way.
  • the ram was rough threaded to increase the coating contact area, sprayed with the bond-coat of the alloy of the invention to a thickness of 0.1 mm en which a further coating of the COLMONOY C 290 alloy was built up to a thickness sufficient to machine back to the original ram size.
  • bond-coats produced from an alloy according to the invention possess very good properties of adhesion to the substrate, sufficient even to withstand the severe test of subsequent machining. These good adhesion properties enable a bond-coat produced from an alloy of the invention to be used for reclamation of areas of components which have been mismachined to dimensions below the minimum required dimensions. Such areas may be bond-coated and subsequently machined or ground to the required dimensions without the need for roughening or undercutting of the substrate area to be reclaimed.
  • alloys according to the present invention may be used as bond-coats for the application of ceramic deposits, such as alumina (nominal composition by weight, 94.0% aluminium oxide, 2.5% titanium oxide, 2.0% silicon dioxide, plus usual impurities) or TITANIA (Trade Mark) (nominal composition, by weight, 50% aluminium oxide, 50% titanium dioxide) to a metal substrate.
  • ceramic deposits such as alumina (nominal composition by weight, 94.0% aluminium oxide, 2.5% titanium oxide, 2.0% silicon dioxide, plus usual impurities) or TITANIA (Trade Mark) (nominal composition, by weight, 50% aluminium oxide, 50% titanium dioxide) to a metal substrate.
  • TITANIA Trade Mark
  • the bond-coat may be applied directly onto a machined and degreased substrate without grit-blasting being necessary.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
EP81300805A 1980-02-28 1981-02-26 Alliages pour l'obtention de couches de liaison par projection thermique Ceased EP0035377A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8006763 1980-02-28
GB8006763 1980-02-28

Publications (1)

Publication Number Publication Date
EP0035377A1 true EP0035377A1 (fr) 1981-09-09

Family

ID=10511747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81300805A Ceased EP0035377A1 (fr) 1980-02-28 1981-02-26 Alliages pour l'obtention de couches de liaison par projection thermique

Country Status (1)

Country Link
EP (1) EP0035377A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212512A1 (de) * 1981-04-06 1982-11-04 Eutectic Corp., 11358 Flushing, N.Y. Frei fliessendes und selbst bindefaehiges flammspruehpulver
DE3212513A1 (de) * 1981-04-06 1982-12-23 Eutectic Corp., 11358 Flushing, N.Y. Flammspritzpulver und dessen herstellung
EP0081170A3 (en) * 1981-12-05 1984-09-26 Bbc Aktiengesellschaft Brown, Boveri & Cie. High-temperature protective coating
DE19900942A1 (de) * 1999-01-13 2000-07-20 Man B & W Diesel As Verfahren zur Erzeugung eines Schutzbelags sowie Maschine mit wenigstens einem mit einem Schutzbelag versehenen Bauteil
RU2161211C1 (ru) * 2000-01-12 2000-12-27 Волгоградский государственный технический университет Способ обработки поверхностей трения
WO2002058927A1 (fr) * 2001-01-25 2002-08-01 Jimmie Brooks Bolton Procedes d'application d'un materiau reducteur d'usure sur des raccords de tige
US6428858B1 (en) * 2001-01-25 2002-08-06 Jimmie Brooks Bolton Wire for thermal spraying system
DE19858913B4 (de) * 1998-12-19 2004-01-15 Mtu Aero Engines Gmbh Schutzschicht

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019875A (en) * 1973-07-06 1977-04-26 Metco, Inc. Aluminum-coated nickel or cobalt core flame spray materials

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019875A (en) * 1973-07-06 1977-04-26 Metco, Inc. Aluminum-coated nickel or cobalt core flame spray materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Thin Solid Films, Vol. 53, 1978 Lausanne (CH) I. KVERNES et al.: "Use of Corrosion-Resistant Plasma-Sprayed Coatings in Diesel Engines", pages 259-269 * Table 1, sample GA-B, 10 * *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212512A1 (de) * 1981-04-06 1982-11-04 Eutectic Corp., 11358 Flushing, N.Y. Frei fliessendes und selbst bindefaehiges flammspruehpulver
DE3212513A1 (de) * 1981-04-06 1982-12-23 Eutectic Corp., 11358 Flushing, N.Y. Flammspritzpulver und dessen herstellung
EP0081170A3 (en) * 1981-12-05 1984-09-26 Bbc Aktiengesellschaft Brown, Boveri & Cie. High-temperature protective coating
DE19858913B4 (de) * 1998-12-19 2004-01-15 Mtu Aero Engines Gmbh Schutzschicht
DE19900942A1 (de) * 1999-01-13 2000-07-20 Man B & W Diesel As Verfahren zur Erzeugung eines Schutzbelags sowie Maschine mit wenigstens einem mit einem Schutzbelag versehenen Bauteil
DE19900942C2 (de) * 1999-01-13 2003-04-10 Man B & W Diesel As Kopenhagen Verfahren zur Erzeugung eines Schutzbelags sowie Maschine mit wenigstens einem derartigen Schutzbelag
RU2161211C1 (ru) * 2000-01-12 2000-12-27 Волгоградский государственный технический университет Способ обработки поверхностей трения
WO2002058927A1 (fr) * 2001-01-25 2002-08-01 Jimmie Brooks Bolton Procedes d'application d'un materiau reducteur d'usure sur des raccords de tige
US6428858B1 (en) * 2001-01-25 2002-08-06 Jimmie Brooks Bolton Wire for thermal spraying system
US6861612B2 (en) 2001-01-25 2005-03-01 Jimmie Brooks Bolton Methods for using a laser beam to apply wear-reducing material to tool joints

Similar Documents

Publication Publication Date Title
JP2601754B2 (ja) 基板の耐食耐摩耗性の改善法
EP1583851B1 (fr) Revetements de diffusion polymetalliques anticorrosion, et procede d'application
US5516586A (en) Method for protecting a metal surface
US4628004A (en) Powder metal and/or refractory coated ferrous metal
US4542048A (en) Powder metal and/or refractory coated ferrous metals
US4537837A (en) Corrosion resistant metal composite with metallic undercoat and chromium topcoat
EP0035377A1 (fr) Alliages pour l'obtention de couches de liaison par projection thermique
US6613452B2 (en) Corrosion resistant coating system and method
Abdivakhidov Application and removing protective metal coatings
US5395661A (en) Method of manufacturing an immersion member with pore-sealing layer
EP1546424B9 (fr) Procédé d'application d'un revetêment à base d'un oxyde de niobium par pulvérisation thermique
JPWO1993011277A1 (ja) 溶融金属浴用浸漬部材の製造方法
GB2073248A (en) Bond-coating alloys for thermal spraying
JP3009341B2 (ja) 窒化硼素−シリケートシーラント
US5575865A (en) Process for coating a workpiece of steel with an anti-corrosive agent
EP0603797B1 (fr) Couche de silicure possédant une bonne résistance aux métaux liquides
KR100923651B1 (ko) 기계 도금용 투사재 및 고내식성 피막
JPH0257140B2 (fr)
Verstappen et al. Durability of powder-coated hot-dip galvanized steel
DE69930163D1 (de) Polymetallat und heteropolymetallat zur passivierungsbeschichtung metallischer oberflächen
JPH05171457A (ja) 有機複合型合金化溶融Ｚｎめっき鋼板
JPH0256421B2 (fr)
Rawdon Corrosion Embrittlement of Duralumin IV: The Use of Protective Coatings
US5965199A (en) Corrosion-resistant coating prepared by the thermal decomposition of lithium permanganate
JP2526678Y2 (ja) 亜鉛メッキ設備用搬送ロール

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR IT

17P Request for examination filed

Effective date: 19820303

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WALL COLMONOY LIMITED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19840603

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BELL, GERALD ROBERT