(19)
(11) EP 0 256 555 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.02.1989 Bulletin 1989/08

(43) Date of publication A2:
24.02.1988 Bulletin 1988/08

(21) Application number: 87111982.2

(22) Date of filing: 18.08.1987
(51) International Patent Classification (IPC)4: C22C 1/10, C22C 32/00
(84) Designated Contracting States:
AT BE CH DE ES FR GB IT LI NL SE

(30) Priority: 18.08.1986 US 897745

(71) Applicant: Inco Alloys International, Inc.
Huntington West Virginia 25720 (US)

(72) Inventors:
  • Benn, Raymond Christopher
    Huntington, W VA 25705 (US)
  • Fischer, John Joseph
    Huntington, W VA 25701 (US)
  • Smith, Gaylord Darrell
    Huntington, W VA 25705 (US)

(74) Representative: Greenstreet, Cyril Henry et al
Haseltine Lake & Co. Hazlitt House 28 Southampton Buildings Chancery Lane
London WC2A 1AT
London WC2A 1AT (GB)


(56) References cited: : 
   
       


    (54) Dispersion strengthened alloys


    (57) A dispersion strengthened powder metallurgical iron-base alloy combines good stress rupture strength and high resistance to oxidation attack at temperatures as high as 1300°C and contains special amounts of chromium, aluminum, a refractory metal dispersoid and pre­ferably titanium in addition to iron. Advantageously, the alloy is prepared by mechanical alloying.





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