(19)
(11) EP 1 033 414 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.09.2002 Bulletin 2002/38

(43) Date of publication A2:
06.09.2000 Bulletin 2000/36

(21) Application number: 00301474.3

(22) Date of filing: 24.02.2000
(51) International Patent Classification (IPC)7: C22C 29/06, C22C 29/08, C22C 29/10, B22F 7/06
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 01.03.1999 US 258954

(71) Applicant: GENERAL ELECTRIC COMPANY
Schenectady, NY 12345 (US)

(72) Inventors:
  • Dey, Nishit
    Colimbus, Ohio 43220 (US)
  • Marek, Henry Samuel
    Worthington, Ohio 43235 (US)
  • O'tighaernaigh, Eoin M.
    Worthington, Ohio 43235 (US)

(74) Representative: Szary, Anne Catherine, Dr. et al
GE London Patent Operation, Essex House, 12-13 Essex Street
London WC2R 3AA
London WC2R 3AA (GB)

   


(54) Corrosion resistant polycrystalline abrasive compacts


(57) A supported abrasive particle compact is composed of a cobalt-cemented carbide support integrally bonded to an abrasive particle layer of self-bonded diamond particles or CBN particles. The cobalt content in said supported compact is provided in form of a nickel-cobalt alloy wherein the amount of nickel is such that the cobalt is present in the face center cubic (FCC) or e phase. The inventive cutters can be made by infiltration of Ni metal into cemented WC substrate and/or the polycrystalline layer bonded thereto. Bonding includes high pressure/high temperature (HP/HT) formation of the supported polycrystalline compact and the brazing of the polycrystalline compact to the support.






Search report