(19)
(11) EP 0 605 175 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.04.1995 Bulletin 1995/14

(43) Date of publication A2:
06.07.1994 Bulletin 1994/27

(21) Application number: 93310374.9

(22) Date of filing: 21.12.1993
(51) International Patent Classification (IPC)5: C23C 4/06, C23C 4/18
(84) Designated Contracting States:
CH DE FR GB IT LI

(30) Priority: 30.12.1992 US 998712

(71) Applicant: PRAXAIR S.T. TECHNOLOGY, INC.
Danbury, Connecticut 06810-5113 (US)

(72) Inventor:
  • Walsh, Patrick Noel
    Indianapolis, Indiana 46208 (US)

(74) Representative: W.P. Thompson & Co. 
Coopers Building, Church Street
Liverpool L1 3AB
Liverpool L1 3AB (GB)


(56) References cited: : 
   
       


    (54) A coated article and a method of coating said article


    (57) The present specification discloses a coated article having a wear and corrosion resistant coating which is formed by blending a powder formulation having a metal carbide-metal binder component and a nickel base boron containing alloy component. The blend is deposited on a body of the article by a method capable of producing a coating with an as-deposited porosity of less than 5% and a boron content of 1.3 to 3.0 wt % of the whole coating. Then the coated article is preferably heat-treated to achieve in the coating a microhardness above 900 Kg/mm² HV.3 and the elimination of all interconnected porosity. The coating thus produced will sustain oil quenching without cracking.






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